Updated on 2022/04/13

写真a

 
MIZUNO, Koji
 
Organization
Graduate School of Engineering Mechanical Systems Engineering 2 Professor
Graduate School
Graduate School of Engineering
Undergraduate School
School of Engineering Mechanical and Aerospace Engineering
Title
Professor
Contact information
メールアドレス

Degree 2

  1. 博士(工学) ( 1999.9   名古屋大学 ) 

  2. Master of Engineering ( 1988.3   The University of Tokyo ) 

Research Interests 3

  1. Crash safety

  2. Driver response

  3. Impact biomechanics

Research Areas 3

  1. Others / Others  / Machine Mechanics/Control

  2. Others / Others  / Machine Material/Material Mechanics

  3. Others / Others  / 自動車工学

Current Research Project and SDGs 5

  1. Occupant Protection in Automobile Collisions

  2. Pedestrian protection in car collision

  3. 高齢者の転倒時の大腿骨近位部骨折の防止に関する研究

  4. Pediatric injuries in automobile collisions

  5. 緊急時のドライバ応答に関する研究

Research History 1

  1. Nagoya University   Green Mobility Collaborative Research Center

    2011.4

Education 3

  1. Nagoya University   Graduate School, Division of Engineering

    1997.4 - 1999.9

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    Country: Japan

  2. The University of Tokyo   Graduate School, Division of Engineering

    1986.4 - 1988.3

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    Country: Japan

  3. The University of Tokyo   Faculty of Engineering

    1982.4 - 1986.3

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    Country: Japan

Professional Memberships 4

  1. Society of Automotive Engineers

  2. 機械学会

  3. 自動車技術会

  4. 日本交通科学学会   理事

Committee Memberships 20

  1. 内閣府中央交通安全対策会議   専門委員  

    2020.4 - 2021.3   

  2. 国土交通省交通政策審議会   臨時委員  

    2020.10   

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    Committee type:Government

  3. 国土交通省 自動車アセスメント評価検討委員会   委員  

    2003.4   

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    Committee type:Government

  4. 国土交通省 車両安全対策検討のための医工連携による詳細事故調査分析検討会   委員  

    2012.4   

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    Committee type:Government

  5. 国土交通省車両安全対策検討会   委員  

    2011.4   

  6. 交通事故総合分析センター事業用自動車事故調査委員会   委員  

    2014.4   

  7. 第56回日本交通科学学会学術講演会   大会長  

    2020.11   

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    Committee type:Academic society

  8. 自動車技術会論文集編集委員会   委員  

    2020.4   

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    Committee type:Academic society

  9. 日本機械学会論文集(JBSE)編集委員会   委員  

    2019.4   

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    Committee type:Academic society

  10. 日本交通科学学会   理事  

    2019.4   

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    Committee type:Academic society

  11. 名古屋大学出版会   評議員  

    2017.4   

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    Committee type:Other

  12. 貸切バスの確実な点検整備の実施に関する検討会   座長  

    2016.6 - 2017.3   

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    Committee type:Government

  13. 国土交通省 軽井沢スキーバス事故対策検討委員会   委員  

    2016.1 - 2016.6   

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    Committee type:Government

  14. 内閣府中央交通安全対策会議   専門委員  

    2015.4 - 2016.3   

  15. International Journal of Crashworthiness   Editorial board  

    2014.1   

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    Committee type:Academic society

  16. International Journal of Vehicle Safety   Editor  

    2014.1   

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    Committee type:Academic society

  17. 国土交通省 使用過程車の保守管理に関する調査分析検討会   委員  

    2011.4 - 2012.3   

  18. 国土交通省 政策審議会WG委員   委員  

    2010.10 - 2011.5   

  19. 独立行政法人 交通安全環境研究所   客員研究員  

    2004.4   

  20. International Forum of Automobile Traffic Safety   Academic Committee  

    2002.1   

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    Committee type:Academic society

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Awards 11

  1. 日本機械学会東海支部特別功労賞

    2021.3   日本機械学会東海支部  

    水野幸治

  2. Society of Automotive Engineers (SAE) Fellow

    2020.12  

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    Country:United States

  3. 自動車技術会 2018年春季大会学術講演会 優秀講演発表賞

    2018.10   自動車技術会   胸たわみ低減のためのシートベルトシステムの提案

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  4. 交通事故総合分析センター25周年記念論文優秀賞(読売新聞社賞)

    2017.10   交通事故総合分析センター   今後の道路交通安全対策はいかにあるべきか -映像を用いた事故分析の有用性について-

    水野幸治,伊藤大輔,細川成之,田中良知

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    Award type:Award from publisher, newspaper, foundation, etc.  Country:Japan

  5. 自動車技術会フェローエンジニア

    2017.1   自動車技術会  

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    Country:Japan

  6. 自動車技術会論文賞

    2016.5   自動車技術会  

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

  7. 自動車技術会フェロー

    2010.6   自動車技術会  

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    Country:Japan

  8. U.S. Government Award for Safety Engineering Excellence

    2009.6   Department of Transport, US  

  9. 三井住友海上福祉財団賞論文賞

    2005   三井住友海上福祉財団  

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    Country:Japan

  10. International forum of automobile traffic safety貢献賞

    2002.1   International forum of automobile traffic safety  

    水野幸治

  11. 運輸省交通安全公害研究所所長表彰

    2000.7   運輸省交通安全公害研究所  

    水野幸治

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Papers 102

  1. Experimental study on car collisions with bicycles equipped with child seats, Accident Analysis and Prevention Reviewed

    Takaaki Terashima, Kenshiro Kato, Ryo Oga, Nobuaki Takubo, Koji Mizuno

    ACCIDENT ANALYSIS AND PREVENTION   Vol. 166   2022.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.aap.2021.106535

  2. A preliminary FE analysis of a helmeted head in an A-pillar impact: effects of whole-body kinematic behavior of cyclist and head-helmet interaction on brain strain Reviewed

    Ito Daisuke, Sugiura Kotaro, Mizuno Koji

    INTERNATIONAL JOURNAL OF CRASHWORTHINESS   Vol. 27 ( 1 ) page: 160 - 167   2022.1

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/13588265.2020.1779995

    Web of Science

  3. The Head AIS 4+Injury Thresholds for the Elderly Vulnerable Road User Based on Detailed Accident Reconstructions Reviewed International coauthorship

    FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY   Vol. 9   2021.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.3389/fbioe.2021.682015

    Web of Science

  4. Analysis of normal and tangential restitution coefficients in car collisions based on finite element method Reviewed

    Yamamoto Yuta, Zhao Yuqing, Mizuno Koji

    INTERNATIONAL JOURNAL OF CRASHWORTHINESS     2021.5

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/13588265.2021.1926825

    Web of Science

  5. Studies of the interaction between the lap belt and anterior superior iliac spine Reviewed

      Vol. 52 ( 2 ) page: 337 - 342   2021.3

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    Authorship:Last author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: doi.org/10.11351/jsaeronbun.52.337

  6. Evaluation of rib deformation of THOR dummy in seat belt loadings Reviewed

      Vol. 52 ( 2 ) page: 486 - 491   2021.3

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    Authorship:Last author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.11351/jsaeronbun.52.486

  7. Analysis of car driver responses to avoid car-to-cyclist perpendicular collisions based on drive recorder data and driving simulator experiments Reviewed International coauthorship

    Yuqing Zhao, Teruki Miyahara, Koji Mizuno, Daisuke Ito, Yong Han

      Vol. 150   2021.2

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.aap.2020.105862

    Web of Science

  8. Analysis of kinematic behavior of pedestrians/cyclists in vehicle collisions using impulse Reviewed

    Shinya Murano, Chunyu Kong, Koji Mizuno, Daisuke Ito, Daisuke Nakane, Asei Wakabayashi

    Traffic Injury Prevention   Vol. 21 ( 5 ) page: 335 - 340   2020.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/15389588.2020.1745197

    Web of Science

  9. A new approach for uncertainty analysis of ETW Rider Head Injury Reconstruction via Coupling Response Surface and Monte Carlo methodologies Reviewed International coauthorship

    Han Yong, Xu Jiashao, Thomson Robert, Mizuno Koji

    FORENSIC SCIENCE INTERNATIONAL   Vol. 309   2020.4

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.forsciint.2020.110195

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  10. Chest compression of a pregnant woman by a seatbelt might affect fetal outcome, even in minor to moderate frontal vehicle collisions Reviewed

    Ishiko Akiko, Hitosugi Masahito, Takaso Marin, Mizuno Koji, Tsuji Shunichiro, Ono Tetsuo, Kimura Fuminori, Murakami Takashi

    FORENSIC SCIENCE INTERNATIONAL   Vol. 302   2019.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.forsciint.2019.109888

    Web of Science

  11. Analysis of pedestrian kinematics and ground impact in traffic accidents using video records Reviewed International coauthorship

    Han Yong, Li Quan, Wang Fang, Wang Bingyu, Mizuno Koji, Zhou Qing

    INTERNATIONAL JOURNAL OF CRASHWORTHINESS   Vol. 24 ( 2 ) page: 211-220   2019.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/13588265.2018.1429520

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  12. AEB effectiveness evaluation based on car-to-cyclist accident reconstructions using video of drive recorder

    Zhao Yuqing, Ito Daisuke, Mizuno Koji

    TRAFFIC INJURY PREVENTION   Vol. 20 ( 1 ) page: 100-106   2019.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/15389588.2018.1533247

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  13. The effects of inboard shoulder belt and lap belt loadings on chest deflection

    Koji Mizuno, Ryoichi Yoshida, Yutaka Nakajima, Yoshihiko Tanaka, Ryota Ishigaki, Naruyuki Hosokawa, Yoshinori Tanaka, Masahito Hitosugi

    Stapp Car Crash Journal   Vol. 62   page: 1-25   2018.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  14. Difference between car-to-cyclist crash and near crash in a perpendicular crash configuration based on driving recorder analysis

    Ito Daisuke, Hayakawa Kosei, Kondo Yuma, Mizuno Koji, Thomson Robert, Piccinini Giulio Bianchi, Hosokawa Naruyuki

    ACCIDENT ANALYSIS AND PREVENTION   Vol. 117   page: 1-9   2018.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.aap.2018.03.029

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  15. Analysis of pedestrian-to-ground impact injury risk in vehicle-to-pedestrian collisions based on rotation angles

    Shi Liangliang, Han Yong, Huang Hongwu, Li Quan, Wang Bingyu, Mizuno Koji

    JOURNAL OF SAFETY RESEARCH   Vol. 64   page: 37-47   2018.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jsr.2017.12.004

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  16. Study of chest injuries to 3YO child occupants seated in impact shield and 5-point harness CRSs Reviewed

    Yong Han, Di Pan, Jun Ouyang, Lei Qian, Koji Mizuno, Anguo Cang

    Traffic Injury Prevention   Vol. 19 ( 3 ) page: 274 - 279   2018

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    DOI: 10.1080/15389588.2017.1385780

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  17. Application of energy derivative method to determine the structural components' contribution on the deceleration in crashes Reviewed

    Kei Nagasaka, Koji Mizuno, Robert Thomson

    Traffic Injury Prevention   Vol. 19 ( 6 ) page: 651 - 656   2018

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/15389588.2018.1456657

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  18. Validation of Crush Energy Calculation Methods for Use in Accident Reconstructions by Finite Element Analysis Reviewed

    3. Sunsuke Numata, Koji Mizuno, Daisuke Ito, Hisashi Kinoshita, Dai Okumura

    SAE International Journal of Transportation Safety   Vol. 6 ( 2 ) page: 133 - 145   2018

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.4271/09-06-02-0009

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  19. Soft Tissue Injury Risk in Chest and Abdomen of 3YO Child based on CRS dynamic load

    Han Yong, Peng Le Yuan, Pan Di, Tang Hui Cong, Huang Hongwu, Mizuno Koji

    2018 10TH INTERNATIONAL CONFERENCE ON MEASURING TECHNOLOGY AND MECHATRONICS AUTOMATION (ICMTMA)     page: 545-548   2018

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/ICMTMA.2018.00139

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  20. Analysis of the equation of motion on the chest of Hybrid III 3YO dummy in dynamic loads

    Han Yong, Tang Huicong, Tian Fengyi, Huang Hongwu, Mizuno Koji

    2018 INTERNATIONAL CONFERENCE ON ROBOTS & INTELLIGENT SYSTEM (ICRIS 2018)     page: 529-533   2018

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/ICRIS.2018.00137

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  21. Proposal of a calculation method to determine the structural components' contribution on the deceleration of a passenger compartment based on the energy-derivative method

    Nagasaka Kei, Mizuno Koji, Ito Daisuke, Saida Naoya

    TRAFFIC INJURY PREVENTION   Vol. 18   page: S79-S84   2017

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    DOI: 10.1080/15389588.2017.1296957

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  22. Head protection with cyclist helmet in impact against vehicle A-pillar

    Mizuno Koji, Ito Daisuke, Oida Keiji, Kobayashi Goichi, Han Yong

    INTERNATIONAL JOURNAL OF CRASHWORTHINESS   Vol. 22 ( 3 ) page: 322-331   2017

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    DOI: 10.1080/13588265.2016.1259952

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  23. Comparison of chest injury measures of hybrid III dummy Reviewed

    Mizuno Koji, Nezaki Shogo, Ito Daisuke

    INTERNATIONAL JOURNAL OF CRASHWORTHINESS   Vol. 22 ( 1 ) page: 38-48   2017

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/13588265.2016.1215587

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  24. Analysis of injuries requiring ophthalmological check-ups because of frontal vehicle collisions Reviewed

    Masahito Hitosugi, Marin Takaso, Atsuko Matsumoto, Takeshi Koseki, Satoshi Furukawa, Koji Mizuno

    Romanian Journal of Legal Medicine   Vol. 24 ( 4 ) page: 261-265   2016.12

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    DOI: 10.4323/rjlm.2016.261

  25. The influence of lower extremity postures on kinematics and injuries of cyclists in vehicle side collisions Reviewed

    Koji Mizuno, Hidefumi Yamada, Hiroshi Mizuguchi, Daisuke Ito, Yong Han, Masahito Hitosugi

    Traffic Injury and Prevention   Vol. 17 ( 6 ) page: 618-624   2016.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/15389588.2015.1126671

  26. Crash pulse optimization for occupant protection at various impact velocities Reviewed

    Daisuke Ito, Yokoi Yusuke, Koji Mizuno

    Traffic Injury and Prevention   Vol. 16 ( 1 ) page: 62-69   2015.4

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  27. Adult headform impact tests of three Japanese child bicycle helmets in vehicle-cyclist collisions Reviewed

    Koji Mizuno, Daisuke Ito, Ryoich Yoshida, Hiroyuki Masuda, Hiroshi Okada, H., Mitsunori Nomura, Chikayo Fujii

    Accident Analysis and Prevention   Vol. 73   page: 359-372   2014.12

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi:10.1016/j.aap.2014.09.018

  28. Bumper contact sensor for pedestrian collisions based on analysis of pedestrian kinematic behavior Reviewed

    Daisuke Ito, Koji Mizuno, Takaharu Ueyama, Daisuke Nakane, Shingo Wanami

    International Journal of Crashworthiness   Vol. 19 ( 5 ) page: 514-523   2014.9

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    DOI: 10.1080/13588265.2014.917493

  29. Dynamic response and injury risk of pedestrians in mini car collision

    Yong Han, Koji Mizuno, Yasuhiro Matsui

    Journal of Automotive Safety and Energy   Vol. 4 ( 3 ) page: 244-249   2013.9

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  30. Analysis of child-vehicle collision injuries by vehicle type Reviewed

    Kawato, H., Hitosugi, M., Mizuno, K., Matsui, Y., Tokudome, S.

    Journal of Pediatric Surgery   Vol. 55 ( 6 ) page: 1588-1592   2013.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jpedsurg.2011.09.039

  31. Severity of child pedestrian injuries due to bonnet-type vehicle collisions Reviewed

    Pediatrics International   Vol. 55 ( 6 )   2013.5

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    DOI: doi: 10.1111/ped.12140

  32. Simulation study on mechanism of hip fractures in backward falls Reviewed

    Hirabayashi, S., Tsuchida, T., Tanaka, E., Mizuno, K

    Journal of Biomechanical Science and Engineering   Vol. 8 ( 4 )   2013

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    DOI: DOI: 10.1299/jbse.8.328

  33. Optimization of vehicle deceleration to Reduce Occupant injury risks in frontal impact, Traffic Injury Prevention Reviewed

    Traffic Injury Prevention   Vol. 15 ( 1 ) page: 48-55   2013

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/15389588.2013.792408

  34. Effects of vehicle impact velocity, vehicle front-end shapes on pedestrian injury risk

    Han, Y., Yang, J., Mizuno, K., Matsui, Y.

    Traffic Injury Prevention   Vol. 13 ( 5 ) page: 507-518   2012.9

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  35. FE analysis of child occupant kinematics in CRS in side oblique impact Reviewed

    Yingai Cui, Yamaguchi Masatomo, Koji Mizuno, Yoshinori Tanaka, Ryoich Yoshida

    International Journal of Crashworthiness   Vol. 17 ( 3 ) page: 233-242   2012.6

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  36. A study on chest injury mechanism and the effectiveness of a headform impact test for pedestrian chest protection from vehicle collisions Reviewed

    Han, Y., Yang, J., Mizuno, K., Matsui, Y.

    Safety Science   Vol. 50 ( 5 ) page: 1304-1312   2012.6

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  37. Comparison of responses of the Flex-PLI and TRL legform impactors in pedestrian tests Reviewed

    Mizuno, K., Ueyama, T., Nakane, D., Wanami, S.

    nternational Journal of Passenger Cars - Mechanical Systems   Vol. 5   page: 203-213   2012.5

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi:10.4271/2012-01-0270

  38. Evaluation of mechanical properties of skeletal muscle with strain injury Reviewed

    Ito D., Yamamoto S., Tanaka E., Mizuno K.

    Journal of Biomechanical Science and Engineering   Vol. 17 ( 2 ) page: 156-167   2012.4

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  39. Finite element analysis of kinematic behavior and injuries of pedestrians in vehicle collisions Reviewed

    Han, Y., Yang, J., Nishimoto, K., Mizuno, K., Matsui, Y., Nakane, D., Wanamie, S., Hitosugi M.

    International Journal of Crashworthiness   Vol. 17 ( 2 ) page: 141-152   2012.4

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  40. 後席乗員の胸部傷害を軽減するための車両減速度の最適化 Reviewed

    坂野雄亮,水野幸治,吉田良一

    自動車技術会論文集   Vol. 43 ( 2 ) page: 237-241   2012.3

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  41. 側面衝突試験によるCRS 子ども乗員の頭部挙動とスレッド試験による再現 Reviewed

    吉田良一,岡田宏,野邑満教,横橋松人,藤居睦代,水野幸治,田中良知,細川成之

    自動車技術会論文集   Vol. 42 ( 6 ) page: 1335-1340   2011.11

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  42. Head Injury Mechanisms of a Child Occupant in a Child Restraint System Based on Side Oblique Impact Tests

    Ryoichi Yoshida, Mitsunori Nomura, Hiroshi Okada, Koji Mizuno, Hideki Yonezawa, Yoshinori Tanaka, Naruyuki Hosokawa

    Stapp Car Crash Journal   Vol. 55   page: 117-139   2011.11

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    n side collision accidents, the head is the most frequently injured body region for child occupants seated in a child restraint system (CRS). Accident analyses show that a child's head can move out of the CRS shell, make hard contact with the vehicle interior, and thus sustain serious injuries. In order to improve child head protection in side collisions, it is necessary to understand the injury mechanism of a child in the CRS whose head makes contact with the vehicle interior. In this research, an SUV-to-car oblique side crash test was conducted to reconstruct such head contacts. A Q3s child dummy was seated in a CRS in the rear seat of the target car. The Q3s child dummy's head moved out beyond the CRS side wing, moved laterally, and made contact with the side window glass and the doorsill. It was demonstrated that the hard head contact, which produced a high HIC value, could occur in side collisions. A series of sled tests was carried out to reproduce the dummy kinematic behavior observed in the SUV-to-car crash test, and the sled test conditions such as sled angle, ECE seat slant angle and velocity-time history that duplicated the kinematic behavior were determined. A parametric study also was conducted with the sled tests; and it was found that the impact angle, harness slack, chest clip, and the CRS side wing shape affected the torso motion and head contact with the vehicle interior.

  43. Performance of Collision Damage Mitigation Braking Systems and their Effects on Human Injury in the Event of Car-to-Pedestrian Accidents

    Yasuhiro Matsui, Yon Hang, Koji Mizuno

    Stapp Car Crash Journal   Vol. 55   page: 461-477   2011.11

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    The number of traffic deaths in Japan was 4,863 in 2010. Pedestrians account for the highest number (1,714, 35%), and vehicle occupants the second highest (1,602, 33%). Pedestrian protection is a key countermeasure to reduce casualties in traffic accidents. A striking vehicle's impact velocity could be considered a parameter influencing the severity of injury and possibility of death in pedestrian crashes. A collision damage mitigation braking system (CDMBS) using a sensor to detect pedestrians could be effective for reducing the vehicle/pedestrian impact velocity. Currently in Japan, cars equipped with the CDMBS also have vision sensors such as a stereo camera for pedestrian detection. However, the ability of vision sensors in production cars to properly detect pedestrians has not yet been established. The effect of reducing impact velocity on the pedestrian injury risk has also not been determined.
    The first objective of this study is to evaluate the performance of the CDMBS in detecting pedestrians when it is installed in production cars. The second objective of this study is to evaluate the effect of reducing impact velocity on mitigating pedestrian injury.
    Firstly, impact experiments were performed using a car with the CDMBS in which the car collided with a pedestrian surrogate. In these tests, the velocity was chosen for the various test runs to be 20, 40 and 60 km/h, respectively, which were based on the velocity distribution in real-world pedestrian crashes. The results indicated that the impact velocity reduction ranged approximately from 10 to 15 km/h at the standing location of a pedestrian surrogate at both daytime and nighttime lighting conditions. These results show that the system has the potential to reduce pedestrian casualties from car-to-pedestrian contacts.
    Secondly, finite-element analyses were performed simulating vehicle-to-pedestrian impacts with the THUMS pedestrian models. The vehicle models selected for the study included a medium sedan, a minicar, and an SUV. Since head and chest injuries are the most typical causes of pedestrian deaths in car-to-pedestrian accidents, the risk of head and chest injuries was calculated when the impact velocity was reduced from 50 km/h to 40 km/h, 30km/h, and 20 km/h. The results revealed that an impact velocity reduction of 10 km/h mitigated severe pedestrian injury at impact velocities greater than or equal to 40 km/h. Specifically, a significant effect was observed in collisions with the medium sedan and SUV. In Japan, the CDMBS has just started to be installed in medium sedans. The pedestrian injury mitigation will be greatly improved if the system can be applied to various types of vehicles including SUVs in the future.

  44. Severity of vehicle bumper location in vehicle-to-pedestrian impact accidents Reviewed

    Matsui, Y., Hitosugi, M., Mizuno, K.

    Forensic Science International   Vol. 212 ( 1-3 ) page: 205-209   2011.10

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    Pedestrian protection is one of the key topics for safety measures in traffic accidents all over the world. To analyze the relation between the collision site of the vehicle bumper and the severity of the lower extremity injuries, we performed biomechanical experiments. We compared the applied external force and the risks of subsequent injuries between the impact of the center and side positions of the front bumper. These comparisons were performed by practical impact tests with eight typical different types of cars which were typical of the current vehicle fleets. The tests were made using the TRL legform impactor which was a mechanical substitute of a pedestrian lower extremity. The TRL impactor is used all over the world for assessing the safety of car bumpers. It was found that the risks of lower extremity injuries in the impacts at the side positions, in front of the vehicle's side member, were significantly higher than those at the center. In the tests, we found that foam materials around the rigid front cross member had a significant effect on reducing the lower extremity injury risks and especially tibia fracture risk against vehicle bumper center collisions, but had little effect at the sides of the bumper over the vehicle's side members where the foam was thinner. We also found that the front shape of the vehicle affected the risk of ligaments injuries. According to these results, the information of impact locations of cars in vehicle-to-pedestrian traffic accidents is valuable for clinicians to diagnose patients with lower extremity injuries in traffic accidents and for forensic pathologists to analyze the accident reconstruction. Furthermore, the results suggest that testing of the bumper area in front of the main longitudinal beams should be included in the car safety legislation to require pedestrian safety.

    DOI: 10.1016/j.forsciint.2011.06.012

  45. 歩行者下肢保護試験におけるFLEXとTRLインパクタの応答比較 Reviewed

    上山孝治,菊地裕輔,水野幸治,中根大祐,和波真吾

    自動車技術会論文集   Vol. 42 ( 5 ) page: 1035-1040   2011.9

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  46. Effect of Test Conditions on Child Occupant Responses in CRS Reviewed

    Koji Mizuno, Takahiro Ikari, Hiroshi Kawahara, Masami Kubota, Susumu Ohsato

    International Journal of Automotive Engineering   Vol. 2 ( 2 ) page: 26-32   2011.4

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    A child restraint system (CRS) is installed in various vehicles with different seat, seatbelt routing paths, and seatbelt characteristics. In this research, a series of sled tests were conducted using the ECE R44 seat bench utilizing various CRS models under the same crash pulse specified by JNCAP. During the impact in JNCAP, the cushion of the multi-purpose vehicle seat was soft and the CRS rotated, which led to large forward excursions of the CRS and dummy. A trend was observed that there is a linear relationship of the assessment values between the JNCAP tests and the ECE base tests.

  47. Analysis of Maxillofacial Injuries of Vehicle Passengers Involved in Frontal Collisions Reviewed

    Masahito Hitosugi, Koji Mizuno, Toshiaki Nagai, Shogo Tokudome

    Journal of Oral Maxillofacial Surgery   Vol. 69 ( 4 ) page: 1146-1156   2011.4

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    Purpose: To clarify the incidence and mechanisms of maxillofacial injuries sustained by motor vehicle passengers, in-depth data from the Institute for Traffic Accident Research and Data Analysis, Japan, were retrospectively analyzed.
    Materials and Methods: From the Institute for Traffic Accident Research and Data Analysis in-depth data for 1993 through 2005, data were collected for 226 individuals with maxillofacial injuries who were adult passengers involved in frontal motor vehicle collisions. The accident information, a subject's medical data, and anatomic Injury Severity Scores were examined.
    Results: The median Injury Severity Score was 2, and the mean equivalent barrier speed of the vehicles was 35.2+-13.0 km/hour. The most common maxillofacial injuries were lacerations (46.7%), followed by abrasions (41.9%), fractures (14.0%), and dental injuries (5.7%). Maxillofacial fractures occurred more often in unrestrained drivers without airbag deployment (18.4%) and less often in restrained drivers with airbag deployment (4.3%). The incidences of fractures caused by impacts with areas other than the steering wheel were markedly decreased using any safety device (35.5% to 0%).
    Conclusion: Combined use of seat belts and airbags by occupants decreases fractures compared with completely unrestrained occupants. Furthermore, wearing a seat belt prevents the free flight of drivers within a vehicle and contact with the interior of a vehicle (other than the steering wheel). Although the anatomic Injury Severity Score of maxillofacial injuries was relatively low, because these injuries are also associated with socioeconomic costs, the correct use of safety devices and further development of more
    effective injury prevention systems are needed.

    DOI: 10.1016/j.joms.2010.05.030

  48. Seatbelt Effectiveness for Rear seat Occupants in Frontal Crashes Reviewed

      Vol. 16 ( 1 ) page: 63-74   2011.3

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    In Japan, it became mandatory for rear seat occupants to wear seatbelts as of 2008. This paper summarises the results of full car crash tests for rear seat occupants, and compares the kinematics and injury risk to belted and unbelted rear sear occupants in order to show the effectiveness of seatbelts. Full-width rigid barrier and offset frontal impact tests were conducted using Hybrid III fifth percentile female and 3-year-old dummies in belted or unbelted conditions in the rear seat. In both full and offset frontal tests, the injury measures of the belted fifth female and 3-year-old dummies in the rear seat were relatively low
    because contact with the car interior was prevented by the seatbelt, although the head injury criterion and the chest deflection of the fifth female dummy were relatively large. In the tests with the fifth female dummy not belted, its knees and head made contact with the front seatback and the head of the front seat dummy, respectively. Due to this impact by the fifth female dummy, the injury measures of the driver dummy became high. The unbelted 3-year-old dummy moved in the passenger compartment, making contact with several locations in the car. These test results were comparable with accident analyses that show high injury risks to the chest of belted rear seat occupants, and high injury risks to the head and lower extremities in unbelted rear seat occupants.

    DOI: /10.1080/13588265.2010.514770

  49. 有限インパルス応答を適用した衝撃時の乗員応答予測 Reviewed

    長坂 圭,水野幸治

    自動車技術会論文集   Vol. 42 ( 2 ) page: 67-72   2011.3

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  50. The Effectiveness of Matching of Front Rail Height in Car-to-Car Crashes Reviewed

    Koji Mizuno, Yuji Arai

    International Journal of Crashworthiness   Vol. 15 ( 6 ) page: 571-579   2010.12

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  51. Analysis of Loading of Lower Extremities Based on Bending Moment in Car-Pedestrian Collisions Reviewed

    Daisuke Nakane, Sadayuki Kuwahara, Yasuhito Ozeki, Junichi Taniguchi, Koji Mizuno

    International Journal of Crashworthiness   Vol. 15 ( 5 ) page: 481-490   2010.11

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  52. Occupant Responses in Child Restraint Systems Subjected to Full-Car Side Impact Tests Reviewed

    Hideki Yonezawa, Yoshinori Tanaka, Naruyuki Hosokawa, Yasuhiro Matsui, Koji Mizuno, Ryoichi Yoshida

    SAE International Journal of Passenger Cars - Mechanical Systems   Vol. 3 ( 1 ) page: 744-767   2010.8

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  53. ECE R44試験条件における各種CRSでのHybrid III 3YOとQ3との応答比較に関する考察 Reviewed

    田中良知,米澤英樹,細川成之,松井靖浩,水野幸治,山口真誠,吉田良一

    自動車技術会論文集   Vol. 41 ( 3 )   2010.5

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  54. Countermeasures to Mitigate Head and Neck Injuries to Toddlers in Frontal and Lateral Vehicle Crash Conditions Reviewed

    Tanya Kapoor, William Altenhof, Andrew Howard, Anne Snowdon, Jim Rasico, Fuchun Zhu, Koji Mizuno

    International Journal of Crashworthiness   Vol. 15 ( 1 ) page: 17-37   2010

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  55. Basic Parameters Affecting Child Occupant Responses in Side Impact Reviewed

    Tanya Kapoor, William Altenhof, Andrew Howard, Anne Snowdon, Jim Rasico, Fuchun Zhu and Koji Mizuno

    International Journal of Vehicle Safety   Vol. 4 ( 4 ) page: 300-314   2010

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  56. 有限要素解析に基づく歩行者事故における衝突車両の前面形状が歩行者の胸部傷害に及ぼす影響 Reviewed

    松井靖浩,高橋国夫,西本雄俊,水野幸治,一杉正仁,中根大祐,和波真吾

    自動車技術会論文集   Vol. 41 ( 5 ) page: 1017-1022   2010

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  57. Occupant Responses in Child Restraint Systems Subjected to Full-Car Side Impact Tests Reviewed

    13. Hideki Yonezawa, Yoshinori Tanaka, Naruyuki Hosokawa, Yasuhiro Matsui, Koji Mizuno, Ryoichi Yoshida

      Vol. 3 ( 1 ) page: 744-767   2010

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  58. The Kinematic Behavior and Responses of Hybrid III 3YO Dummy and Child Human FE Model in ISOFIX CRS in Frontal Impact Reviewed

    Jia Hu, Koji Mizuno

    International Journal of Crashworthiness   Vol. 14 ( 4 ) page: 391-404   2009.8

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    An ISOFIX-attached child restraint system (CRS) implements a simple, rigid and standardised attachment to a vehicle seat compared to the conventional-type CRS attached by a vehicle seat belt. The goal of this research is to investigate the kinematic behaviour and responses of a child restrained by an ISOFIX CRS in frontal impact and to investigate the effect of utilising a force limiter in the top tether of the ISOFIX CRS on reducing injury assessment measures. A finite-element (FE) model of a Hybrid III 3-year-old dummy and a child human model restrained by a five-point harness conventional-type CRS (using a vehicle seat belt for installation) and a five-point harness ISOFIX CRS were developed and validated using frontal sled tests. Since the thoracic region of the spine of the human model is flexible as compared to the Hybrid III dummy model, the contact behaviour of the chin and chest differs between the Hybrid III dummy model and the child human model. This behaviour led to different upper neck forces and moments. The energy absorption efficiency of the CRS harness for the chest was calculated to understand the relation with the chest acceleration levels in various usage conditions. A top-tether force limiter proved to be useful. Particularly, the torso of both the Hybrid III dummy model and the child human FE model showed an upright posture in the ISOFIX CRS with a top-tether force limiter, and the head and chest accelerations and upper neck forces and moments were reduced, although the head excursion increased slightly.

  59. Effectiveness of Wearing Seatbelt for Rear Seat Occupants in Full Frontal Rigid Barrier Impact tests Reviewed

    Yasuhiro MATSUI, Koji MIZUNO, Takahiro IKARI, Kenichi TOMITA

      Vol. 34 ( 1 ) page: 99-106   2009.6

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    The purpose of the present study is to clarify the effectiveness of seatbelt for rear seat occupants in frontal crashes. The Hybrid III AF05 and 3 YO dummies were seated in the rear seat with belted or unbelted condition, and full frontal rigid barrier impact tests were
    carried out. For the belted AF05 dummy in the rear seat, the injury risk was low, on the other hand, when the AF05 was not belted, risks to head injury and femur fracture were particularly high due to contact with several locations in car interior. When the 3 YO dummy was not restrained by the child restraint systems, the unbelted 3 YO dummy was flied over the front seat, which resulted in the possibility of high injury risk due to contact with several locations in car interior.

  60. Comparison of Human FE Model and Crash Dummy Response in Various Child Restraint Systems Reviewed

    Koji Mizuno, Kazuya Iwata, Tatsuya Namikiri, Nobuhiko Tanaka

    International Journal of Crashworthiness   Vol. 14 ( 2 ) page: 139-149   2009.4

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    In order to investigate injuries to various body regions of a child in detail, a child finite element (FE) model had been developed previously. In this study, a pelvis with a child anatomical structure was newly developed and incorporated into the existing model. In examining a method for modelling the pelvis, it was shown that the anatomical structures of a child should be represented in order to evaluate stress distributions. This updated child FE model was exercised using sled test simulations with various child restraint systems (CRS), such as a 5-point harness, an impact shield and a safety vest. The FE analyses were also conducted using a Hybrid III 3-year-old (3YO) FE model. The main differences between the kinematic
    behaviour of the Hybrid III 3YO and child FE models were due to the flexibility of the thoracic spine in the child FE model. In analyses with the 5-point harness and the impact shield CRS, the predicted injury measures were comparable between the two models; whereas in the safety vest the injury measure predictions were noticeably different. It was demonstrated that the child FE model is useful to examine the behaviour, local deformation and stress distributions of a child during impacts, which could be difficult to predict using the Hybrid III 3YO FE model.

  61. *Effectiveness and Evaluation of SEAS of SUV in Frontal Impact Reviewed

    Koji Mizuno, Yuji Arai, Kunio Yamazaki, Hidenobu Kubota, Hideki Yonezawa, Nariuki Hosokawa

    International Journal of Crashworthiness   Vol. 13 ( 5 ) page: 553-541   2008.10

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  62. Load Limiting Behaviour in CRS Tether Anchors as a Method to Mitigate Head and Neck Injuries to Children in Frontal Crash Reviewed

    Tanya Kapoor, William Altenhof, Miroslav Tot, Wencheng Zhang, Andrew Howard, Jim Rasico, Fuchun Zhu, Koji Mizuno

    Traffic Injury Prevention   Vol. 9 ( 3 ) page: 243-255   2008

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    This study focuses on methods to reduce injuries, specifically in the head and neck region, sustained by children seated in forward-facing child restraint system during a frontal vehicle crash. The main objective of this research was to implement load-limiting behavior into the upper tether and lower LATCH anchors of the CRS in order to reduce the neck injury criteria by increasing forward head excursion.

  63. Occupant Responses in Child Restraint Systems in Side Impact Tests Reviewed

    International Journal of Vehicle Safety   Vol. 3 ( 3 ) page: 14-41   2008

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  64. Evaluation of Crash Compatibility Based on Car-to-Car Crash Tests Reviewed

    Hideki Yonezawa, Naruyuki Hosokawa, Koji Mizuno

    International Journal of Vehicle safety   Vol. 3 ( 3 ) page: 81-90   2008

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    Results of car-to-car crash tests were examined to evaluate crash compatibility. The method of calculating driver scores based on Japan NCAP was applied to the car-to-car crash tests. Self-protection and aggressivity could be evaluated based on the scores of the drivers of both vehicles. It was shown that the compatibility performance of small cars could be demonstrated with the use of delta-V of 60 to 70 km/h.

  65. Evaluation of Lower Extremity Injury Risk Using Pedestrian FE Model and TRL Legform Impactor Reviewed

    Koji Mizuno, Keita Okada, Toshio Hosokawa, Sadayuki Kuwahara, Daisuke Nakane

    Review of Automotive Engineering   Vol. 28 ( 4 )   2007.10

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    A human finite element (FE) model was used to evaluate injury risks of pedestrian lower extremities in car-to-pedestrian collision. The bending moment diagram and stress diagram of tibia were introduced to investigate loading to leg. Using car models, it was demonstrated that the location of the lower absorber affects loadings on tibia and knee significantly. The FE analysis using TRL legform impactor was also conducted using the same series of car models. The injury criteria of both FE models were compared, and it is suggested that the tibia stress and knee angle in the human FE model tended to increase with increasing of the injury criteria of the TRL impactor.

  66. Finite Element Analysis of Pedestrian Lower Extremity Injuries in Car-to-Pedestrian Impacts Reviewed

    Sadayuki Kuwahara, Toshio Hosokawa, Keita Okada, Koji Mizuno

    SAE 2007 Transactions Journal of Passenger Cars – Mechanical Systems   Vol. V116-6   page: 2007-01-0755   2007.3

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    In order to prevent lower extremity injuries to a pedestrian when struck by a car, it is important to elucidate the loadings from car front structures on the lower extremities and the injury mechanism caused by these loadings. In this udy, using a human finite element (FE)model, a bending moment diagram and a stress diagram of tibia were introduced to examine the effects of loading from car structures. By the lower absorber of the car, the bending moment was distributed over the tibia with small moment at the upper tibia location that can reduce knee injury risk. Certain positions of the lower absorber reduced the tibia fracture risk. An FE analysis of a legform impact test using the TRL legform impactor was also conducted, and a relation was found between the injury criteria of the TRL legform impactor and the human FE model. High acceleration of the TRL legform impactor corresponded to the tibia fracture or MCL rupture of the human FE model.

  67. Pediatric Biomechanics Invited Reviewed

    Koji Mizuno

    Review of Automotive Engineering   Vol. 28 ( 1 )   2007.1

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    A human finite element (FE) model was used to evaluate injury risks of pedestrian lower extremities in car-to-pedestrian collision. The bending moment diagram and stress diagram of tibia were introduced to investigate loading to leg. Using car models, it was demonstrated that the location of the lower absorber affects loadings on tibia and knee significantly. The FE analysis using TRL legform impactor was also conducted using the same series of car models. The injury criteria of both FE models were compared, and it is suggested that the tibia stress and knee angle in the human FE model tended to increase with increasing of the injury criteria of the TRL impactor.

  68. 歩行者人体FEモデルとTRL脚部インパクタの傷害評価の比較 Reviewed

    自動車技術会論文集   Vol. 38 ( 2 ) page: 259-264   2007

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  69. 歩行者転倒における大腿骨頚部骨折発生機序の生体力学的検討 Reviewed

    山本創太,田中英一,窪内靖治,池田武司,水野幸治,原田敦,奥泉宏康

    日本機械学会論文集   Vol. 72 ( 723 ) page: 1799-1807   2006.11

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  70. Case study of a low-velocity pedestrian accident Reviewed

      Vol. 2 ( 1 ) page: 316-329   2006

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  71. CRSの拘束方法による人体モデルと衝突ダミーの衝撃応答の比較 Reviewed

    自動車技術会論文集   Vol. 37 ( 6 ) page: 193-198   2006

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    開発した3歳児人体FEモデルに対して,子供の解剖学的特長を持つ骨盤モデルを組み込んだ.さらに拘束方法の異なる三種類のCRSについて,Hybrid III FEモデルと3歳児人体FEモデルの衝撃応答の比較をおこなった.

  72. SUVの構造インタラクション改善のための評価試験に関する研究 Reviewed

    自動車技術会論文集   Vol. 37 ( 6 ) page: 199-204   2006

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  73. Effects of Loading Direction on Anterior Cruciate Ligament Injury Reviewed

    Sota Yamamoto, Akinori Saito, Akinori Ishikawa, Koji Mizuno, Eiichi Tanaka

      Vol. 27 ( 3 ) page: 316-329   2006

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  74. Evaluation of Passenger Compartment Strength in Car-to-Car Frontal Crashes Reviewed

    Koji Mizuno, Kazumasa Tateishi, Hideki Yonezawa, Hiroko Minda

    Vehicle compatibility in automotive crashes   Vol. SAE PT102   2005.4

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  75. *Development of a Three-Year-Old Child FE Model Reviewed

    Koji Mizuno, Kazuya Iwata, Takashi Deguchi, Takashi Ikami, Masami Kubota

    Traffic Injury Prevention   Vol. 6 ( 4 ) page: 361-371   2005

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  76. コンパティビリティの評価試験に関する研究 Reviewed

    自動車技術会論文集   Vol. 36 ( 6 ) page: 187-192   2005

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  77. *Full-Width Test and Overload Test to Evaluate Compatibility Reviewed

    Koji Mizuno, Yuji Arai, Masao Notsu

    SAE 2005 Transactions, Journal of Passenger Car     page: 2005-01-1373   2005

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  78. Test Procedures for Vehicle Compatibility Evaluation Reviewed

    Koji Mizuno, Yuji Arai, Kunio Yamazaki, Hideki Yonezawa, Masao Notsu

    International Journal of Crashworthiness   Vol. 10 ( 5 )   2005

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  79. ヒッププロテクタによる大腿骨頸部転倒骨折予防の生体力学的検討 Reviewed

    田中英一,山本創太,尾関重宣,水野幸治,原田敦,水野雅士

    日本機械学会論文集   Vol. 70 ( 697 ) page: 1193-1200   2004.9

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  80. Compartment Strength and Its Evaluation in Car Crashes Reviewed

    International Journal of Crashworthiness   Vol. 9 ( 5 ) page: 547-557   2004

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  81. Finite Element Analysis of Knee Injury Risks in Car-to-Pedestrian Impacts Reviewed

    Traffic Injury Prevention   Vol. 4 ( 4 ) page: 345-354   2003

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  82. 子供の歩行者事故とその解析に関する研究 Reviewed

    自動車技術会論文集   Vol. 34 ( 1 ) page: 145-149   2003

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  83. Vehicle Crashworthiness in Full and Offset Frontal Impact Tests Reviewed

    Koji Mizuno, Kenji Wani, Hideki Yonezawa

    JSAE Review   Vol. 24 ( 2 ) page: 173-181   2003

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  84. Comparative Analysis of Vehicle-Bicyclist and Vehicle-Pedestrian Accidents in Japan Reviewed

    Tetsuo Maki, Janusz Kajzer, Koji Mizuno, Yasufumi Sekine

    Accident Analysis & Prevention   Vol. 35 ( 6 ) page: 927-940   2003

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  85. 次世代の側突試験法に関する研究 Reviewed

    自動車技術会論文集   Vol. 33 ( 2 ) page: 101-106   2002

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  86. 自転車乗員の頭部衝突位置に関する考察 Reviewed

    自動車技術会論文集   Vol. 33 ( 1 ) page: 95-100   2002

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  87. オーバーロード試験による衝突時の客室強度の評価 Reviewed

    自動車技術会論文集   Vol. 32 ( 4 ) page: 121-126   2001.10

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  88. *Head Injuries in Vehicle-Pedestrian Impact Reviewed

    Koji Mizuno, Janusz Kajzer

    SAE 2000 Transactions, Journal of Passenger Car     page: 2000-01-0157   2001

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  89. Accident Analysis of Sports Utility Vehicle – Human Factors from Statistic Analysis and Case Study Reviewed

    Nobuaki Takubo, Koji Mizuno

    JSAE Review   Vol. 21 ( 1 ) page: 103-108   2000

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  90. コンパティビリティの試験法に関する研究 Reviewed

    自動車技術会論文集   Vol. 31 ( 4 ) page: 79-84   2000

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  91. MADYMOによる軽乗用車の前突安全性の解析 Reviewed

    自動車技術会論文集   Vol. 30 ( 1 ) page: 139-144   1999.1

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  92. *Compatibility Problems in Frontal, Side, Single Car Collisions and Car-to-Pedestrian Accidents in Japan Invited Reviewed

    Koji Mizuno, Janusz Kajzer

    Accident Analysis & Prevention   Vol. 31 ( 4 ) page: 89-99   1999

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  93. 歩行者事故における頭部傷害と衝突部位の関係 Reviewed

    自動車技術会論文集   Vol. 30 ( 4 ) page: 55-60   1999

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  94. 側面衝突時における車体変形によるエネルギー吸収に関する研究 Reviewed

    自動車技術会論文集   Vol. 30 ( 4 ) page: 61-66   1999

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  95. 事故データとシミュレーションによる自動車衝突時のコンパティビリティの解析 Reviewed

    水野幸治,ヤヌシュ・カイザー

    日本機械学会論文集   Vol. 65 ( 631 ) page: 245-252   1999

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  96. The Relationship Between Car Size and Occupant Injury in Traffic Accidents in Japan

    Koji Mizuno, Hideki Yonezawa, Tetsuhiro Umeda

    SAE Transactions   Vol. 16   1998

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

  97. Compatibility Analysis of Mini Cars in Frontal Collisions Using MADYMO

    International Journal of Crash worthiness   Vol. 3   page: 2   1998

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

  98. The Effect of Vehicle Mass in Car-to-Car Collisions

    SAE Transactions   Vol. 15   1997

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

  99. The Relationship Between Car Size and Occupant Injury in Collisions

    Transaction of Society of Automotive Engineers of Japan   Vol. 28   page: 4   1997

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

  100. The Effect of Vehicle Mass on Occupant's Injury in Car-to-Car Collisions Reviewed

    Transaction of Society of Automotive Engineers of Japan   Vol. 27   page: 3   1996

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

  101. Study on the Effects of Motorcycle Anti-Lock-Braking System for Skilled and Less-Skilled Riders Reviewed

    Yoshinori Toyofuku, Kazuo Matsushima, Yasuhiko Irie, Hideki Yonezawa, Koji Mizuno

    JSAE Review   Vol. 15   page: 223-228   1994

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    Language:English   Publishing type:Research paper (scientific journal)  

  102. Characterization of Thermal Stresses in Ceramic/Metal-Joint

    Journal of the Faculty of Engineering, the University of Tokyo   Vol. 39 ( 4 ) page: 401-412   1988

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

▼display all

Books 9

  1. 交通外傷―メカニズムから診療まで―

    一杉正仁,西山慶 編( Role: Joint author ,  第6章 交通事故時の挙動と受傷メカニズム(3) 自動車乗員)

    名古屋大学出版会  2020.6  ( ISBN: 4815809925

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    Total pages:268   Responsible for pages:69-82   Language:Japanese Book type:Scholarly book

  2. 自動車の衝突安全 基礎論

    水野幸治( Role: Sole author)

    名古屋大学出版会  2018.10  ( ISBN:4815809224

  3. 自動車工学の基礎

    近森順, 森吉泰生, 岡村宏, 北條春夫, 熊谷頼範, 森村浩明, 川口裕, 水野幸治( Role: Joint author ,  第7章)

    名古屋大学出版会  2018.6  ( ISBN:4815809119

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    Language:Japanese Book type:Scholarly book

    現代社会に不可欠な自動車には、様々な技術が凝縮されている。本書は基礎科目である機械力学や熱力学などの発展として自動車工学を一貫した形で捉え直し、変わりゆく技術を根底から支える不変のロジックを身につける。工学部生・高専生のみならず、現場の技術者の学び直しにも最適。

    Other Link: https://www.amazon.co.jp/%E8%87%AA%E5%8B%95%E8%BB%8A%E5%B7%A5%E5%AD%A6%E3%81%AE%E5%9F%BA%E7%A4%8E-%E8%BF%91%E6%A3%AE-%E9%A0%86/dp/4815809119/ref=sr_1_18?__mk_ja_JP=%E3%82%AB%E3%82%BF%E3%82%AB%E3%83%8A&keywords=%E8%87%AA%E5%8B%95%E8%BB%8A%E5%B7%A5%E5%AD%A6&qid=1563921552&s=gateway&sr=8-18

  4. Crash Safety of Passenger Vehicles

    Koji Mizuno( Role: Joint author)

    2017.2  ( ISBN:9791158061975

  5. Crash Safety of Passenger Vehicles

    Koji Mizuno( Role: Sole author)

    Golden Bell  2016.12  ( ISBN:9791158061975

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    Total pages:430   Book type:Scholarly book

  6. 自動車工学・第6章衝突安全

    自動車技術会 教育図書編集委員会( Role: Joint author)

    自動車技術会  2013.3  ( ISBN:4-915219-30-5

  7. 自動車の衝突安全

    水野幸治( Role: Sole author)

    名古屋大学出版会  2012.2 

  8. 工学技術者と医療従事者のためのインパクトバイオメカニクス

    インパクトバイオメカニクス部門委員( Role: Joint author)

    自動車技術会  2006.7 

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    Language:Japanese

  9. 交通外傷バイオメカニクス

    水野幸治,一杉正仁( Role: Joint author)

    自動車技術会  2003.5 

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    Language:Japanese

▼display all

MISC 1

  1. ドライブレコーダを用いた四輪車対自転車の出会い頭事故の分析 Invited

    趙 雨晴,水野幸治

    自動車技術   Vol. 75 ( 9 ) page: 96 - 101   2021.9

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

Presentations 57

  1. 歩行者事故における路面傷害の分析 Invited

    水野幸治

    インパクトバイオメカニクス部門委員会  2021.12.10  インパクトバイオメカニクス部門委員会

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    Event date: 2021.12

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

  2. 四輪車対自転車事故のドライバから見た発生要因 Invited

    水野幸治

    第5回日本安全運転・医療研究会  2021.12.5 

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    Event date: 2021.12

    Presentation type:Oral presentation (invited, special)  

    Venue:日本安全運転・医療研究会  

  3. 衝突安全の基礎 Invited

    水野幸治

    第1回自動車工学基礎講座  2021.11.11  次世代自動車センター浜松

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    Event date: 2021.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:ONLINE  

  4. 野球ボール衝突による脳変形メカニズムの検討

    近藤悠生, 水野幸治, 伊藤大輔

    日本機械学会第31回バイオフロンティア講演会  2020.12.12  日本機械学会

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    Event date: 2020.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:ONLINE  

  5. 様々な段階から見た安全 -自転車の安全を例として- Invited

    水野幸治

    第56回日本交通科学学会学術講演会  2020.11.23  日本交通科学学会講演会

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:ONLINE  

  6. 歩行者および自転車乗員挙動の力積による解析

    堀木誠大,水野幸治

    第56回日本交通科学学会学術講演会  2020.11.23  日本交通科学学会講演会

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:ONLINE  

  7. 反発係数に基づく衝突時の車両挙動解析

    山本裕太,水野 幸治

    第56回日本交通科学学会学術講演会  2020.11.23  日本交通科学学会講演会

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:ONLINE  

  8. ダミーの加速度・角速度を用いた軌跡の算出

    奉 海傑,川畑 誠,水野幸治

    第56回日本交通科学学会学術講演会  2020.11.23  日本交通科学学会講演会

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:ONLINE  

  9. ドライブレコーダとドライビングシミュレータを用いた四輪車対自転車出会い頭衝突回避のためのドライバ反応の分析

    趙 雨晴,宮原 輝貴,水野 幸治,伊藤 大輔

    第56回日本交通科学学会学術講演会  2020.11.23  日本交通科学学会講演会

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:ONLINE  

  10. シートベルト負荷によるTHORダミーの胸部変形の評価

    徐 蕾, 青島侑平, 是永大地, 水野幸治

    自動車技術会2020年秋季大会  2020.10.21  自動車技術会

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    Event date: 2020.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:ONLINE  

  11. ラップベルトと骨盤上前腸骨棘の相互作用に関する研究

    安部英和, 水野幸治,田中良彦

    自動車技術会2020年秋季大会  2020.10.21  自動車技術会

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    Event date: 2020.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:ONLINE  

  12. AEB effective evaluations by accident reconstructions using videos of drive recorders in perpendicular and turning car-to-cyclist collisions International conference

    Yuqing Zhao, Daisuke Ito, Koji Mizuno, Chunyu Kong

    International Research Council on Biomechanics of Injury (IRCOBI) 

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    Event date: 2019.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:University of Florence   Country:Italy  

  13. The geometrical relationship between the lap belt and occupants' anterior superior iliac spine International conference

    Koji Mizuno, Wataru Hatano, Ryoichi Yoshida, Yutaka Nakajima, Yoshihiko Tanaka, Takanari Muroya, Ryota Ishigaki

    24th International Technical Conference on the Enhanced-Safety of Vehicles 

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    Event date: 2019.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:Netherlands  

    The restraint of the pelvis by the lap belt is a prerequisite for occupant protection in a 3-point seatbelt system. If the lap belt slips over the anterior superior iliac spine (ASIS), the lap belt can penetrate the abdominal area during impact, leading to abdominal injuries. Many studies of this phenomenon (known as submarining) have focused on cases in which the lap belt is initially positioned correctly, but slips off due to the dynamics of impact. However, lap belt riding over the iliac bone can also occur when the lap belt is placed on the abdomen from the beginning, without overlapping the iliac crest. In this research, the relationship of the lap belt to the ASIS of seated occupants was investigated, first by statically measuring the initial lap belt-ASIS overlap in a group of volunteers and then by using FE analysis to assess the dynamic interaction of the lap belt with ASIS during test-sled crash simulations.
    The lap belt-ASIS overlap of ten volunteers was measured as they sat in a small car's rear seat (where the lap belt anchor is further back). The lap belt did not overlap with the ASIS for four volunteers: of these, three had a body mass index (BMI) of less than average (that is, <24.1 kg/m2). Further measurements of 20 male volunteers sitting in a rigid seat were conducted to examine the factors which affect the lap belt-ASIS overlap. When volunteers sat in an upright posture, the overlap increased as the height of the ASIS relative to the thigh increased. When they sat in a slouching posture, for low-BMI volunteers the lap belt was located higher on the (flat) abdomen and the overlap of the lap belt with the ASIS tended to decrease.
    FE analysis was carried out for rear seat occupants whose ASIS was located at the torso-thigh junction. For the occupant with a protruding abdomen, even though the lap belt did not initially overlap the ASIS, during impact the lap belt was pulled rearward and down; there was sufficient time for the lap belt to interact with the ASIS. However, for the occupant with a flat abdomen, since the abdomen fore-aft diameter and the flesh thickness on the ASIS was small, there was not enough time for the lap belt to interact with the ASIS even though the lap belt was pulled downward, and the lap belt penetrated into the abdomen. Thus, for low-BMI occupants in the rear seat both the initial lap belt-ASIS overlap and the dynamic interaction of the lap belt with the ASIS during vehicle deceleration tend to be insufficient for effective restraint of the pelvis.

  14. Ground landing mechanisms in vehicle-to-pedestrian impacts based on accident video records International conference

    Quan Li, Yong Han, Koji Mizuno

    WCX World Congress Experience 

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    Event date: 2018.4

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

    DOI: 10.4271/2018-01-1044

  15. Analysis of vulnerable road user kinematics before/during/after vehicle Collisions based on video records International conference

    Yong Han, Quan Li, Wei He, Fang Wan, Bingyu Wang, Koji Mizuno

    IRCOBI Conference 

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    Event date: 2017.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Antwerp   Country:Belgium  

  16. Proposal of a calculation method to determine the structural components' contribution on the deceleration of a passenger compartment based on the energy-derivative method International conference

    Kei Nagasaka, Koji Mizuno, Daisuke Ito, Naoya Saida

    25th International Technical Conference on the Enhanced-Safety of Vehicles 

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    Event date: 2017.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  17. Analysis of chest injuries to child occupants seated in impact shield CRS based on dummy tests, FE simulations and animal tests International conference

    Yong Han, Jun Ouyang, Koji Mizuno, Anguo Can

    IRCOBI Conference 

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    Event date: 2016.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Spain  

  18. Comparison of the dummy response in two different restraint system crash tests International conference

    Thorsten Adolph, Andre Eggers, Robert Thomson, Koji Mizuno

    IRCOBI Conference 

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    Event date: 2014.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Germany  

  19. The crashworthiness of minicars in frontal impact tests International conference

    Koji Mizuno, Yuji Arai, Naruyuki Hosokawa, William Hollowell

    23rd International Technical Conference on the Enhanced-Safety of Vehicles 

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    Event date: 2013.5

    Language:English   Presentation type:Oral presentation (general)  

    Country:Korea, Republic of  

    In Japan, the number of minicars is increasing due to market demands resulting from environmental and economic concerns, and constitutes 32% of the registrations among passenger cars (2012). The safety of the minicar for various crashes is a technological challenge due to its small size and mass. In this paper, the crashworthiness of minicars was investigated and the issues that should be addressed are discussed. The crash pulse, deformation, and dummy responses of minicars were examined for various frontal impact tests: fullwidth rigid barrier (FWRB), offset deformable barrier (ODB), full-width deformable barrier (FWDB), and car-to-car tests.
    In the FWRB tests, the car accelerations were high and large crash loadings were applied to the occupants. The dummy injury measures were less than injury thresholds because of the high performance of occupant restraint systems: the early and timely restraint system. In the FWDB tests, the deformation mode was relatively comparable to that in the car-to-car tests, and dummy injury measures were higher than those in the FWRB tests. An analysis using a simple spring-mass model indicated that a later restraint trigger time in the FWDB test led to high injury measures of the occupants. In the ODB tests, the passenger compartment was intact for all of the tested minicars. Since the car acceleration in the ODB test was lower than that in the FWRB tests, all of the injury measures of the driver dummy in the ODB tests were smaller than those in the FWRB tests except for the tibia index.
    In the car-to-car tests, though the minicar has a single-load path, the structural interaction was acceptable since the engine was located forward in the vehicle and interacted with structures of the other car. The passenger compartments of the minicars were intact and injury measures were lower than the injury thresholds until the loading on the vehicles reached the NCAP crash severity level. The crashworthiness of Japanese minicars could be representative of the safety of future mini electric vehicles.

  20. Analysis of abdominal injuries in obese and nonobese restrained occupants International conference

    2. Hitoshi Ida, Koji Mizuno, Masahito Hitosugi, Masashi, Aoki, Michihisa, Asaoka

    23rd International Technical Conference on the Enhanced-Safety of Vehicles 

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    Event date: 2013.5

    Language:English   Presentation type:Oral presentation (general)  

    Country:Korea, Republic of  

    This study clarified the effect of body physique to abdominal injury distribution in terms of frontal passengers at frontal collision using NASS/CDS database with medical knowledge and engineering analysis.
    Present research based on the real-world accident data showed that distribution and severity of abdominal injuries of the restrained front seat occupants in frontal collisions was reflected by the body physique. Obese occupants tend to suffer from the injuries of middle-lower abdomen owing to the seatbelt compression. From the reconstruction of the occupants' kinematics, severity of abdominal injuries largely depended on the pelvic displacement in both obese and nonobese occupants. Therefore, to decrease the severity of abdominal injuries, knee airbag is one of considered proper devices as restraint systems for controlling pelvic displacement. The result of frontal collision simulation with human model THUMS with various body physiques clearly shows that the mechanism and the effects of reduction of abdominal injuries.

  21. Comparison of responses of the Flex-PLI and TRL legform impactors in pedestrian tests International conference

    SAE World Congress 

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    Event date: 2012.4

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  22. Update on Investigation of New Side Impact Test Procedures in Japan International conference

    Hideki Yonezawa, Naruyuki Hosokawa, Yoshinori Tanaka, Yasuhiro Matsui, Takeshi Korenori, Kiyohiko Hirakawa, Koji Mizuno

    22nd International Technical Conference on the Enhanced-Safety of Vehicles 

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    Event date: 2011.5

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  23. Identification of Head Injury Mechanisms of a Child Occupant in a Child restraint System Based on Side Impact Tests International conference

    Ryoichi Yoshida, Hiroshi Okada, Mitsunori Nomura, Matsuto Yokohashi, Chikayo Fujii, Koji Mizuno, Hideki Yonezawa, Yoshinori Tanaka, Naruyuki Hosokawa, Yasuhiro Matsui

    22nd International Technical Conference on the Enhanced-Safety of Vehicles 

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    Event date: 2011.5

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  24. A Study on Head and Chest Injuries in Car-Pedestrian Collisions International conference

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    Event date: 2010.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:China  

  25. Behavior of Occupant Seated in ISOFIX CRS in Various Full-Scale Car Side Impact Tests International conference

    Hideki Yonezawa, Yoshinori Tanaka, Naruyuki Hosokawa, Yasuhiro Matsui, Koji Mizuno, Ryoichi Yoshida

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    Event date: 2010.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:Germany  

  26. Finite Element Analysis of Human Kinematic Behavior and Injuries in Vehicle to Pedestrian Collisions International conference

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    Event date: 2010.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  27. FE Analysis of Child Occupant Kinematics in CRS in Side Oblique Impact International conference

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    Event date: 2010.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  28. Occupant Responses in Child Restraint Systems Subjected to Full-Car Side Impact Tests International conference

    SAE World Congress 

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    Event date: 2010.4

    Language:English   Presentation type:Oral presentation (general)  

  29. Car-to-Car Side Impact Tests in Various Conditions International conference

    SAE World Congress 

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    Event date: 2010.4

    Language:English   Presentation type:Oral presentation (general)  

  30. The Behavior of Child Occupant Seated in ISOFIX CRS in Full-Scale Car Side Impact Tests International conference

    Protection of children in cars, 7th international conference 

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    Event date: 2009.12

    Language:English   Presentation type:Oral presentation (general)  

  31. Finite Element Analysis of Child Occupant Responses in Side Impact International conference

    The Seventh International Forum of Automotive Traffic Safety and Seminar for Impact Biomechanics and Injury Prevention 

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    Event date: 2009.12

    Language:English   Presentation type:Oral presentation (general)  

  32. Study of Chest Injuries by Car Type in Car-Pedestrian Collisions Based on Finite Element Analysis International conference

    The Seventh International Forum of Automotive Traffic Safety and Seminar for Impact Biomechanics and Injury Prevention 

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    Event date: 2009.12

    Language:English   Presentation type:Oral presentation (general)  

  33. 衝突における車体変形と乗員挙動

    水野幸治

    日本機械学会M&M2009材料力学カンファレンス 

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    Event date: 2009.7

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  34. Summary of Activities of the Compatibility Working Group in Japan International conference

    21st International Technical Conference on the Enhanced-Safety of Vehicles 

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    Event date: 2009.6

    Language:English   Presentation type:Oral presentation (general)  

  35. Investigation for New Side Impact Test Procedures in Japan International conference

    21st International Technical Conference on the Enhanced-Safety of Vehicles 

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    Event date: 2009.6

    Language:English  

  36. Responses of Hybrid III 3YO and Q3 Dummies in Various CRSs Tested Using ECE R44 Impact Conditions International conference

    21st International Technical Conference on the Enhanced-Safety of Vehicles 

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    Event date: 2009.6

    Language:English   Presentation type:Oral presentation (general)  

  37. Implementation of child biomechanical neck behaviour into a child FE model International conference

    SAE World Congress 

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    Event date: 2009.4

    Language:English   Presentation type:Oral presentation (general)  

  38. Japan NCAP for Passenger Car Occupant, and Pedestrian Safety International conference

    The Sixth International Forum of Automotive Traffic Safety and Seminar for Impact Biomechanics and Injury Prevention, 

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    Event date: 2008.12

    Language:English   Presentation type:Oral presentation (invited, special)  

  39. Child Occupant Protection in ISOFIX CRS International conference

    The Sixth International Forum of Automotive Traffic Safety and Seminar for Impact Biomechanics and Injury Prevention 

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    Event date: 2008.12

    Language:English   Presentation type:Oral presentation (general)  

  40. Chest deflection of Hybrid III 3YO and Q3 dummy in impact shield CRS International conference

    Protection of children in cars, 6th international conference 

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    Event date: 2008.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  41. The Effectiveness of Matching of Front Rail Height in Car-to-Car Crashes International conference

    ICrash 2008 

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    Event date: 2008.7

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  42. Analysis of loading of lower extremities based on bending moment in car-pedestrian collisions International conference

    ICrash 2008 

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    Event date: 2008.7

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  43. Investigation for New Side Impact Test Procedures in Japan International conference

    Enhanced-Safety of Vehicles 

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    Event date: 2007.6

    Language:English   Presentation type:Oral presentation (general)  

  44. Effectiveness of Seatbelt for Rear Seat Occupants in Frontal Crashes International conference

    Enhanced-Safety of Vehicles 

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    Event date: 2007.6

    Language:English   Presentation type:Oral presentation (general)  

  45. Analysis of Child Reponses in CRS using Child Human FE Model International conference

    Enhanced-Safety of Vehicles 

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    Event date: 2007.6

    Language:English   Presentation type:Oral presentation (general)  

  46. Full-Width Tests to Evaluate Structural Interaction International conference

    Enhanced-Safety of Vehicles 

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    Event date: 2007.6

    Language:English   Presentation type:Oral presentation (general)  

  47. A Comparison of the Kinematics of a Child Finite Element Model and the Hybrid III 3-Year-Old Dummies in Frontal Crashes International conference

    SAE World Congress & Exhibition, April 2007 

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    Event date: 2007.4

    Language:English   Presentation type:Oral presentation (general)  

  48. Finite Element Analysis of Pedestrian Lower Extremity Injuries in Car-to-Pedestrian Impacts International conference

    SAE World Congress 

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    Event date: 2007.4

    Language:English   Presentation type:Oral presentation (general)  

  49. The Responses of Child using ISOFIX CRS during Impacts International conference

    Third Asian Pacific Conference on Biomechanics 

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    Event date: 2007

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  50. Comparison of human FE model and crash dummy response in various child restraint systems International conference

    ICRASH2006 

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    Event date: 2006.7

    Language:English   Presentation type:Oral presentation (general)  

  51. Effectiveness and evaluation of SEAS of SUV in frontal impact International conference

    ICRASH2006 

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    Event date: 2006.7

    Language:English  

  52. 交通事故鑑定の問題点-歩行者事故の再現-

    日本賠償科学会 

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    Event date: 2005.12

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  53. In-depth analysis of car-to-car accidents in Japan International conference

    Compatibility in Road Traffic 

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    Event date: 2005.10

    Language:English   Presentation type:Oral presentation (invited, special)  

  54. Vehicle compatibility International conference

    Koji Mizuno

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    Event date: 2005.9

    Language:English   Presentation type:Oral presentation (invited, special)  

  55. Japan Research on Compatibility Improvement and Test Procedures

    Koji Mizuno, Kunio Yamazaki, Yuji Arai, Maso Notsu

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    Event date: 2005.6

    Language:English   Presentation type:Oral presentation (general)  

  56. Full-Width Test and Overload Test to Evaluate Compatibility International conference

    SAE World Congress 

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    Event date: 2005.4

    Language:English   Presentation type:Oral presentation (general)  

  57. Development of Human Three-Year-Old Child FE Model International conference

    IRCOBI Conference on the Biomechanics of Impact 

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    Event date: 2004.9

    Language:English   Presentation type:Oral presentation (general)  

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Research Project for Joint Research, Competitive Funding, etc. 7

  1. ドライブレコーダによる実事故映像を用いた自転車・歩行者事故発生要因の解明

    2017.4 - 2020.3

    タカタ財団研究助成 

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    Grant type:Competitive

  2. 高齢歩行者死亡事故例における歩行者挙動の解析

    2017.4 - 2019.3

    交通科学学会調査研究 

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    Grant type:Competitive

  3. 自動車衝突時の安全を考慮した自転車乗員ヘルメットの衝撃保護性能改善に関する研究

    2012.11 - 2013.10

    研究助成 交通安全等部門 

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    Grant type:Competitive

  4. 自動車の衝突安全に関する研究

    2008

    国内共同研究 

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    自動車の衝突時の車体特性や拘束装置と乗員傷害値の相関関係をマルチボディシミュレーションにより明らかにし,乗員保護のための対策の有効性を大規模有限要素解析により検証する.

  5. 三歳児の人体モデルを用いた実安全の向上のためのチャイルドシートに関する研究

    2006.4 - 2007.3

    国内共同研究 

  6. 車対歩行者衝突時の傷害リスク低減に関する研究

    2002.4

    国内共同研究 

  7. 車同士の衝突事故分析及び計算機シミュレーション

    2002.1 - 2002.3

    交通安全環境研究所 

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    Grant type:Competitive

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KAKENHI (Grants-in-Aid for Scientific Research) 7

  1. 自動運転に向けた四輪車対自転車事故の統合安全に関する研究

    2019.4 - 2022.3

    科学研究費補助金  基盤研究(B)

    水野幸治

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    Authorship:Principal investigator 

  2. 自動運転に向けた四輪車対自転車事故の統合安全に関する研究

    Grant number:19H02259  2019.4 - 2022.3

    水野 幸治

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    Authorship:Principal investigator 

    Grant amount:\9490000 ( Direct Cost: \7300000 、 Indirect Cost:\2190000 )

    本研究では四輪車対自転車衝突事故を対象として,事故とヒヤリハットのドライブレコーダ映像を比較し,事故の発生因子と閾値を求める.ドライビングシミュレータ実験から,衝突回避が困難な状況下の運転者行動を分析し,四輪運転者の行動モデルを作成する.このモデルを衝突の力学モデルと結合させて,統合事故再現データベースを構築する.データベースに衝突被害軽減ブレーキ等の衝突回避デバイスを導入し,事故における衝突回避効果を得る.さらに,この回避困難な衝突について有限要素解析を行い,自転車乗員の被害軽減の方策を得る.本研究では,事故発生から被害者保護までシームレスにつなぐ統合安全による自転車乗員保護方法を提示する.
    本研究ではドライブレコーダをもとに四輪車対自転車事故の発生要因を分析した.出会い頭事故が最も多いことから,この事故形態の分析を行った.映像から自転車乗員の位置や速度を求める方法を確立した.
    出会い頭事故では道路幅員が狭く,住宅等の建物が視界遮蔽物になっている無信号交差点で発生する場合が多い.四輪車自転車が見える時の衝突余裕時間TTCについて調べると,出会い頭の事故では2種類の類型が存在した.一つは,ドライバが自転車に気付くのが遅れ,ブレーキ反応も遅れたことによる事故であり,もう一つは,自転車の飛び出し事故である.四輪車が制動を開始した時点において,停止までに0.55G以上の減速度を必要とする領域に自転車乗員が入るかどうかで事故とヒヤリハットが区別される.
    ドライビングシミュレータによる被験者実験を行い,ドライブレコーダから確認された事故を再現した.TTCが大きなシナリオでは,被験者のブレーキ反応時間が衝突回避に大きな影響を及ぼす.TTCが小さなシナリオは被験者のブレーキ反応時間,TTC等が全て満たされたときに衝突回避が可能であった.
    ドライブレコーダ映像から事故再現を行い,さらに,衝突被害軽減ブレーキAEBを装備したときのシミュレーションをAEBのパラメータを変えて実施した.運転者の制動遅れに起因する出会い頭事故ではセンサー視野角FOVの拡大が有効であった.一方,自転車の飛び出しに起因するTTCが小さい出会い頭事故ではAEBによる衝突回避が困難であった.
    衝突時の自転車乗員の挙動について有限要素解析を行った.フロントピラーと頭部が衝突するとヘルメットを着用していても,頭蓋骨と脳実質には大きなひずみが発生し,重篤な傷害が予測された.衝突から路面落下までの挙動を明確にするために,車体から加わる力積および力積モーメントを用いて,人体の速度と回転を予測できることがわかった.
    本研究ではドライブレコーダによる四輪車自転車事故の事故映像を用いて,事故の発生要因を明確にし,その対策方法を提示することを目的とする.本研究の研究項目と進捗状況は下記のとおりである.
    1. 自転車乗員との衝突に至るパラメータを抽出するとともにその閾値を求める.さらに,衝突被害軽減ブレーキによる衝突防止効果を検討する.現在,出会い頭事故についてはほぼ研究を終了し,ヒヤリハットと事故を分ける因子,および事故の発生要因が明確となっている.さらに,次年度の予定であった右左折事故に取り組み始めている.
    2. ドライビングシミュレータによって実事故を再現して,ドライバ反応の分析を行い,事故の発生要因を運転者の行動の面から明確化する.今年度の目標であった出会い頭の自転車飛び出しにについては,ドライバ反応の概要が求められた.この反応が,ドライブレコーダによる事故でのドライバ応答とも一致していることを見出すなど,当初の予定を超える成果が得られた.
    3. 衝突時の自転車乗員の被害軽減のため,マルチボディおよび有限要素モデルを作成し,自転車乗員の挙動と頭部保護方法を検討する.これまでに,有限要素モデルから自転車乗員が衝突時に受ける衝撃と傷害の予測が可能となった.本年度の目標としていた直接の傷害リスクの評価に加えて,路面による傷害を検討するめどがたつなど,予想を超える進展があった..
    以上のように,現在,研究計画を超える進捗が得られている.
    ドライブレコーダによる四輪車自転車事故の事故映像による事故の発生要因の明確化,その対策方法の提示をさらに進めるため,つぎの研究項目を下記の手順で進めていく.
    1. 出会い頭事故に加えて,事故発生頻度の高い右左折事故について,自転車乗員との衝突に至るパラメータを抽出するとともにその閾値を求める.右左折事故については,ドライバと自転車乗員の予測の誤り,「Looked-but-failed-to-see」などの問題が関与している可能性があり,ドライバと自転車乗員の顔映像を見ながら事故発生要因の統計分析を進める.さらに,右左折事故では衝突被害軽減ブレーキに加えて,ドライバウォーニングよる衝突防止効果を検討する.
    2. ドライビングシミュレータによる実事故を再現によるドライバ反応の分析をさらに進める.昨年の実験結果の統計分析から,年齢が高いほど,慎重な運転を行うために事故が起きにくいという結果が得られている.さらに後期高齢者も含めた実験を行い,年齢とドライバ反応の関係につて研究を進める.また,右左折についてもドライビングシミュレータ実験を試みる.
    3. 四輪車衝突時の自転車乗員の被害軽減のため,これまでに,作成したマルチボディおよび有限要素モデルによる計算を進め,自転車乗員が四輪車と衝突して以降,路面に衝突するまでの一連の過程での傷害防止対策を検討する.特に,現在,対策が困難とされている路面衝突について,挙動のコントロール方法を検討する.
    4. 自転車衝突における四輪車ドライバへのウォーニング,衝突被害軽減ブレーキ,自転車乗員のヘルメット着用,衝突時の自転車乗員の挙動コントロールを組み合わせた,「統合安全」の効果の見積もり方法について検討する.

  3. 交通事故時の自転車乗員の頭部保護に関する研究

    2013.4 - 2016.4

    科学研究費補助金  基盤研究(C)

    水野幸治

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    Authorship:Principal investigator 

  4. 自動車側面衝突時の子ども乗員の保護

    2010.4 - 2012.3

    科学研究費補助金  基盤研究(C)

    水野幸治

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    Authorship:Principal investigator 

  5. 日本人人体有限要素モデルによる自動車衝突時の後席乗員保護に関する研究

    2007

    科学研究費補助金  基盤研究(C)(一般),課題番号:19560087

    水野 幸治

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    Authorship:Principal investigator 

  6. 低速度の車対歩行者衝突に関する研究

    2005

    科学研究費補助金  基盤研究(C),課題番号:17560225

    水野 幸治

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    Authorship:Principal investigator 

  7. 自動車衝突時の子供の拘束方法に関する生体力学的研究

    2003 - 2004

    科学研究費補助金  基盤C 14550073

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Teaching Experience (On-campus) 33

  1. Vehicle Safety (G30)

    2020

  2. ヒューマンシステム工学特論

    2020

  3. 自動車工学

    2019

  4. 力学II

    2018

  5. ヒューマンシステム工学特論

    2016

  6. 移動体システム創造設計製作2

    2016

  7. 移動体システム創造設計製作1

    2016

  8. 固体力学

    2016

  9. ヒューマンシステム工学セミナー1A

    2015

  10. ヒューマンシステム工学特別実験及び演習A

    2015

  11. ヒューマンシステム工学セミナー1D

    2015

  12. ヒューマンシステム工学セミナー1C

    2015

  13. ヒューマンシステム工学セミナー1B

    2015

  14. ヒューマンシステム工学特別実験及び演習B

    2014

  15. バイオメカニクス特別実験及び演習A

    2011

  16. バイオメカニクスセミナー1D

    2011

  17. バイオメカニクスセミナー1C

    2011

  18. バイオメカニクスセミナー1B

    2011

  19. 数値解析法

    2011

  20. 自動車工学

    2011

  21. バイオメカニクス特別実験及び演習B

    2011

  22. バイオメカニクス特別実験及び演習B

    2010

  23. バイオメカニクス特別実験及び演習A

    2010

  24. バイオメカニクスセミナー1D

    2010

  25. バイオメカニクスセミナー1C

    2010

  26. バイオメカニクスセミナー1B

    2010

  27. バイオメカニクスセミナー1A

    2010

  28. 数値解析法特論

    2010

  29. 基礎セミナー

    2010

  30. 数値解析法

    2010

  31. 数値解析法

    2009

  32. 数値解析法特論

    2009

  33. 自動車工学

    2009

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Teaching Experience (Off-campus) 2

  1. 自動車技術会基礎講座衝突安全

    2010.4 自動車技術会)

  2. Crash Safety

    2009.4 - 2010.3 湖南大学(中国))

 

Social Contribution 2

  1. 上田高校課題研究入門講座

    Role(s):Lecturer

    上田高校  上田高校課題研究入門講座  2020.8

  2. ドライブレコーダを活用した自転車事故分析

    Role(s):Lecturer

    中部運輸局  自動車事故防止セミナー  2019.1

Media Coverage 5

  1. 自転車と交通事故 Newspaper, magazine

    日刊自動車新聞  交通安全・医理工連携の今  110-111  2022.1

  2. 事故時の後部座席「高リスク」 Newspaper, magazine

    京都新聞  2021.7

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    Author:Myself 

  3. 交通安全・医理工連携の今 自転車と交通事故 Newspaper, magazine

    日刊自動車新聞  日刊自動車新聞  2020.5

  4. 国土交通省 チャイルドシート使用法ビデオ Internet

    国土交通省自動車局審査・リコール課  【国土交通省】お子様の安全を脅かす未認証チャイルドシートにご注意!  https://www.youtube.com/watch?v=swpzweGVkn4  2017.6

  5. NHK BS出演 TV or radio program

    NHK  アインシュタインの眼「徹底解剖アクションシーン」  2011.9