研究者詳細 - 青木　宏文

Evaluating Driver Mental Workload in a Realistic Condition using Eye Movement Sensor

Son Le Anh, Aoki Hirofumi

2018 巻 ( 0 ) 2018年

Driving Behavior Improvement through Driving Support and Review Support from Driver Agent

Tanaka Takahiro, Fujikake Kazuhiro, Yoshihara Yuki, Yonekawa Takashi, Inagami Makoto, Aoki Hirofumi, Kanamori Hitoshi

HAI'18: PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON HUMAN-AGENT INTERACTION 頁： 36 - 44 2018年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：HAI 2018 - Proceedings of the 6th International Conference on Human-Agent Interaction

In recent years, the number of traffic accidents caused by elderly drivers in Japan has increased. Cars are an important mode of transportation for the elderly. Thus, to ensure their driving safety, a system that can assist elderly drivers is required. In this study, we propose a driver agent system that provides support to elderly drivers during and after driving and encourages them to improve their driving. In this paper, we describe the proposed driver agent system. We conducted an experiment to evaluate driving behavior improvement through three types of support: driving support, review support, and a combination of both. The results revealed that the combination of both supports lead to the greatest improvements in driving behavior and was most acceptable to elderly drivers.

DOI： 10.1145/3284432.3284444

Development of traction force-speed based fuel consumption prediction model for hybrid vehicles

Pitanuwat S., Aoki H., Iizuka S., Morikawa T.

31st International Electric Vehicle Symposium and Exhibition, EVS 2018 and International Electric Vehicle Technology Conference 2018, EVTeC 2018 2018年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：31st International Electric Vehicle Symposium and Exhibition, EVS 2018 and International Electric Vehicle Technology Conference 2018, EVTeC 2018

In the transportation sector, fuel consumption model is a fundamental tool for vehicles’ energy consumption and emission analysis. Over the past decades, Vehicle Specific Power (VSP) has been adopted in a number of studies to estimate vehicles’ instantaneous driving power. Then, the relationship between driving power and fuel consumption is established as a fuel consumption model. However, this paper has discovered that driving power is not the only factor that indicates vehicles’ fuel consumption. Thus, this study proposes a new methodology for a fuel consumption model development based on fundamentals of hybrid powertrain operation characteristics, which aim to minimize error from the conventional modeling method. First, this study introduces a new driving power estimation equation calibrated for Toyota Prius generation 3. Then, Traction Force-Speed Based Fuel Consumption Model (TFS model) is proposed. By combining these two processes together, it provides a significant improvement on fuel consumption prediction error compared to the conventional VSP prediction method. The absolute maximum error was reduced from 57% to 23%, and more than 90% of the predictions fell inside the 95% confidential interval. In addition, the results show that the proposed model well captures the efficiency variation of the hybrid powertrain. This model is also applicable throughout a variety of real-world traffic and driving conditions.

ドライブレコーダを用いた安全運転行動評価法の提案とそれを用いた高齢ドライバ特性分析

米川隆, 田中貴紘, 青木宏文, 山岸未沙子, 吉原佑器, 稲上誠, 藤掛和広, 木下史也, 金森等, 二宮芳樹, 鈴木達也

自動車技術会論文集 49 巻 ( 2 ) 頁： 384 - 389 2018年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：公益社団法人自動車技術会

近年，高齢ドライバの加齢に伴う運転能力低下で交通事故が増加している. 高齢ドライバの運転能力に合わせた運転支援を行うためには，運転能力の評価を行う必要がある．本研究では，一時停止交差点の運転における，教習所指導員による運転教示の結果とドライブレコーダの運転データを用いて，運転能力の評価手法を提案した．

DOI： 10.11351/jsaeronbun.49.384

Investigation of Factors Affecting the Usability Evaluation of an Adaptive Cruise Control System

Maehigashi Akihiro, Miwa Kazuhisa, Aoki Hirofumi, Suzuki Tatsuya

ENGINEERING PSYCHOLOGY AND COGNITIVE ERGONOMICS (EPCE 2018) 10906 巻頁： 445 - 456 2018年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

In this study, we investigate the factors affecting the usability evaluation of an adaptive cruise control (ACC) system. In this experiment, the participants drove a Toyota Prius car with an ACC on a highway. We sampled 215 types of driving data recorded at a frequency of 60 Hz during driving. At each of the six designated stop points on the driving course, the participants stopped their cars and evaluated the usability of the ACC system by answering the usability questionnaire for automation systems. The participants’ driving styles were measured using the driving style questionnaire. The multiple regression analyses showed that the participants’ driving styles, the ACC’s driving control, and the participants’ intervention in the driving control of the ACC influenced the usability evaluation. The results were discussed in terms of the human–automation interactions and the design principles of an ACC.

DOI： 10.1007/978-3-319-91122-9_36

ドライバエージェントの形態の差異に対する高齢者の主観的評価の比較

藤掛和広, 田中貴紘, 米川隆, 山岸未沙子, 稲上誠, 木下史也, 青木宏文, 金森等

人間工学 53 巻 ( 6 ) 頁： 214 - 224 2017年12月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人日本人間工学会

<p>本研究では，ドライバエージェントの受容性を明らかにする為に，エージェントに対する主観的評価実験を行った．評価者は，高齢者を含む幅広い年齢である．評価するエージェントは「音声」「映像」「ロボット」の3種類の形態である．エージェントに対する評価の結果，「親しみを感じる」等の評価項目では，高齢層と非高齢層に共通して，ロボットエージェントの評価が高かった．また，「邪魔だと思う」等の評価項目では，音声・映像よりも，ロボットエージェントの評価が低かった．このことから，ロボットエージェントは受容性が高く，阻害要因になりにくいと考えられる．また，ドライバエージェントを繰り返し使用することで，評価結果が変化したことから，継続利用の影響も示唆された．今後の研究課題として，最も受容性の高かったロボットエージェントを対象とした運転後の行動変容や長期利用に伴う変化等について検討が必要である．</p>

DOI： 10.5100/jje.53.214

Effect of Mental Workload and Aging on Driver Distraction Based on the Involuntary Eye Movement

Son, LA; Hamada, H; Inagami, M; Suzuki, T; Aoki, H

ADVANCES IN HUMAN ASPECTS OF TRANSPORTATION 484 巻頁： 349 - 359 2017年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Advances in Intelligent Systems and Computing

We have shown that the driver distraction can be quantitatively estimated from the vestibulo-ocular reflex (VOR) that is a type of involuntary eye movement. However, the optokinetic reflex (OKR) was not considered in the previous models. Here, we developed a new model with both VOR and OKR. Using the new model, we investigated the effect of mental workload and aging on the involuntary eye movement as well as the driving performance. In this study, we evaluate driver distraction of younger group (age 20-59) and older group (age 60 and above) while driving with/without mental workload. Total 12 participants (6 in each group) who drive on a daily basis participated in the experiment to evaluate driver distraction. As expected, we succeed in applying VOR and OKR models to evaluate driver distraction while driving. Based on that, the effects of mental workload and aging on driver distraction were analyzed. The results indicate that the older group shows worse performance, especially under the distracted driving condition.

DOI： 10.1007/978-3-319-41682-3_30

Driver Agent for Encouraging Safe Driving Behavior for the Elderly

Tanaka Takahiro, Fujikake Kazuhiro, Yonekawa Takashi, Yamagishi Misako, Inagami Makoto, Kinoshita Fumiya, Aoki Hirofumi, Kanamori Hitoshi

PROCEEDINGS OF THE 5TH INTERNATIONAL CONFERENCE ON HUMAN AGENT INTERACTION (HAI'17) 頁： 71 - 79 2017年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：HAI 2017 - Proceedings of the 5th International Conference on Human Agent Interaction

In recent years, the number of traffic accidents caused by elderly drivers has increased in Japan. However, a car is an important mode of transportation for the elderly. Therefore, to ensure safe driving, a system that can assist elderly drivers is required. In this study, we propose a driver-agent system that provides support to elderly drivers during and after driving and encourages them to improve their driving. This paper describes the prototype system based on the analysis of the teaching records of a human instructor, and the subjective evaluation of driving support to elderly driver from three different agent forms, a voice, visual, and robot. The result revealed the robot form is more noticeable, familiar, and acceptable to the elderly than other forms.

DOI： 10.1145/3125739.3125743

Development of an automated vehicle stop system for cardiac emergencies

Nguyen T.T., Takahashi I., Tanaka T., Takeuchi E., Kato S., Suzuki T., Kanamori H., Ninomiya Y., Aoki H.

Advances in Science, Technology and Engineering Systems 2 巻 ( 3 ) 頁： 669 - 673 2017年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Advances in Science, Technology and Engineering Systems

This paper describes the concept and configuration of a novel automated safety vehicle stop system, and a future prospect of the study. Intrinsic sudden death may cause traffic accident since such accidents sometimes involve not only the driver but also other traffic users such as passengers and pedestrians. Cardiovascular disease (CVD) is considered as a serious driving risk factor. The pain and others effects of cardiac events degrade driver's performance, and CVD causes ischemia brought by the CVD induces incapacity of driving. In the automated safety vehicle stop system, which our research group has developed, steer-sensors collects bio-signals and a camera captures the driver's posture to monitor driver's incapability. When the driver loses his or her driving capability, the system takes over the maneuver of the vehicle and automatically drives to a safety spot by observing the traffic environment. An emergency scenario was used to demonstrate the system verifying its potential.

DOI： 10.25046/aj020385

The effect of visual stimulus on voluntary eye movement based on a VOR/OKR model

Son L., Inagami M., Hamada H., Suzuki T., Aoki H.

International Journal of Automotive Engineering 8 巻 ( 2 ) 頁： 37 - 44 2017年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：International Journal of Automotive Engineering

The main purpose of this study is to investigate the effect of visual stimulus on voluntary eye movement during driving. In this paper, we examine two cases: Driving with/without visual stimulus by means of a driving simulator. We develop a model that consists of both vestibulo-ocular reflex (VOR) and optokinetic reflex (OKR) components. By comparing the observed eye movement and the simulation result of the model, the results of eye movement simulation was more accurate than VOR model only even in a naturalistic situation with optic flow of the visual scene and the driver's voluntary eye movement.

DOI： 10.20485/jsaeijae.8.2_37

H6-1　中高年・高齢ドライバにおける一年間のドライブレコーダデータによる運転行動

山岸未沙子, 米川隆, 田中貴紘, 稲上誠, 佐藤稔久, 赤松幹之, 青木宏文

人間工学 53 巻 ( 1 ) 頁： S248 - S249 2017年

高齢者を含むドライバの一時停止交差点通過時の運転行動と生体機能の分析

田中貴紘, 米川隆, 青木宏文, 山岸未沙子, 高橋一誠, 稲上誠, 金森等

自動車技術会論文集 48 巻 ( 1 ) 頁： 147 - 153 2017年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：公益社団法人自動車技術会

一時停止交差点における高齢ドライバの交通事故が増えている．加齢に伴う，認知機能や視覚機能の低下の影響が指摘されている．本研究では，高齢者を含むドライバを対象に，ドライビングシミュレータを用いて，見通しの異なる一時停止交差点の通過実験を行い，交差点での衝突率とドライバの運転行動，生体機能との関係を分析した．

DOI： 10.11351/jsaeronbun.48.147

H7-3　ドライバエージェントの自動車運転支援に対する高齢者の主観的評価

藤掛和広, 田中貴紘, 米川隆, 山岸未沙子, 稲上誠, 木下史也, 青木宏文, 金森等

人間工学 53 巻 ( 1 ) 頁： S276 - S277 2017年

A study on the relationship between robotic movement with animacy and visual attention of young children

Lee J., Aoki H., Stefanov D., Yamamoto T., Obinata G.

25th IEEE International Symposium on Robot and Human Interactive Communication, RO-MAN 2016 頁： 682 - 687 2016年11月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：25th IEEE International Symposium on Robot and Human Interactive Communication, RO-MAN 2016

Socially assistive robots have been used successfully for improvement of communication skills of young children. Such robots need to attract children's attention and stimulate sustainable interactions. Many recent research studies propose various approaches for increasing of interaction effectiveness of such robots. In this study, we investigate the effect of robotic movements with animacy on the visual attention of young children. For the experiments, we used the TurtleBot robot. The effect of three different robot movement patterns were explored with the conducted tests: simple circle movement, inanimated movement, and animated movement. Thirty four children (21 males, 13 females, Mean of ages: 4.5) participated in an experiment. Results show that robot movement raises visual attention. Most of the children demonstrated increased interest toward animated robotic movement than simple motion. The animated movement that elicits much interest depends on children's age. The findings of this study contribute to effective use of interactive robots in education and therapy of young children and children with developmental disorder.

DOI： 10.1109/ROMAN.2016.7745192

Automated safety vehicle stop system for cardiac emergencies

Takahashi I., Nguyen T.T., Kanamori H., Tanaka T., Kato S., Ninomiya Y., Takeuchi E., Nakagawa T., Makiguchi M., Aoki H.

2016 IEEE International Conference on Emerging Technologies and Innovative Business Practices for the Transformation of Societies, EmergiTech 2016 頁： 9 - 12 2016年11月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：2016 IEEE International Conference on Emerging Technologies and Innovative Business Practices for the Transformation of Societies, EmergiTech 2016

Cardiovascular disease (CVD) is a considerable risk factor of driving. The pain of cardiac events distracts driver's concentration, and ischemia brought by the CVD induces incapacity of driving. In this study, a prototype of the automated safety vehicle stop system has been developed. The system collects bio-signals through the steer-sensor and recognizes the driver's posture by a camera, and detects driver's incapacity. The system takes over the vehicle maneuver when the driver lost his capacity, and automatically drives to a safety spot by sensing the traffic environment. The system has been demonstrated in a prepared emergency scenario and verified the potential. This paper describes the concept and configuration of the system, and a future prospect of the study.

DOI： 10.1109/EmergiTech.2016.7737302