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| Model | : | MDAS (first generation), MDASⅡ(second generation) |
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| Familiar name | : | MDAS (first generation), MDASⅡ(second generation) |
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| Technical applications | : | Prevention of accidents caused by drowsiness, prevention of collision using following distance warnings |
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| Applied model | : | Heavy duty trucks |
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| Year manufactured | : | 1996 |
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| Application year | : | 1996 |
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| Designed by | : | Mitsubishi Fuso Truck and Bus Corporation (Then, Mitsubishi Motors Corporation) |
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| Collaboration | : | Mitsubishi Electric Corporation |
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| Device structure | : | Detection part: CCD camera for lane recognition (attached to headliner of vehicle), laser radar (front grill)
Analysis part: Follow-up distance warning ECU and attention estimation ECU (driver's seat) |
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| Display portion | : | Display part: The driving attention monitor provides multiple displays of the driver's attention level at the center of IP. The attention following distance is provided in the display and spreads air freshener and a warning buzzer if necessary. |
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| Performance function | : | Front obstacle detection distance: 100 m
Driving attention monitor: Displays the estimated attention results each minute on the monitor
Following distance warning: Using the attentiveness information, it sounds a warning at the optimal timing to reduce the warning frequency to 1:7 to 1:8.
Attention maintenance function: This optimizes the type of fragrance, and the application interval and time to provide a fragrance-based attention maintenance function. |
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| Effect | : | The reminders using the driving attention monitor contributes to the prevention of accidents caused by inattention.
Since the following distance warning that utilizes the attention information is issued at an optimal timing, it can be trusted by the driver to help prevent crashes.
In addition, the time that attention can be maintained is maximized by the fragrance-based attention maintenance function. |
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| Points of interest, topicality | : | This is the world's first system for maintaining attention using fragrance, and has been widely reported in the media including TV, radio, newspaper and magazines. |
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| Features | : | 1. The system uses the road lanes to detect deviations in the vehicle's course.
2. It uses fuzzy logic to estimate the attention level of the driver.
3. It transmits the estimated results of the attention level each minute to the driver through a bar graph display.
4. It uses the estimated result of the attention level each minute to adjust the timing for the following distance warning.
5. It also uses fragrance to maintain the attention level. |
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| Reference materials | : | K Yamamoto et al. "Estimate of Driver's Arousal Level using Fuzzy Method" SAE Truck & Bus Meeting (1994)
K. Yamamoto et al. "Correlation between vehicle's meandering and driver's alertness level" JSAE Review 16 49-54 (1995)
K. Yamamoto et al. "Development of driver's alertness monitoring system" Proc. Third Annual World Congress on ITS (1996)
Keiichi Yamamoto et al. "Unten chuiryoku monitor ni kansuru kenkyu"JSME The 6th Transportation and Logistics Conference seminor papers (1997)
Keiichi Yamamoto et al. "Chuiryoku tekiougata shakankyori keiho system no kaihatsu" JSAE seminar pre-printing papers No.60-00, 271(2000)
K Yamamoto "Active Safety Improvement through Effective Use of Driver's Alertness Level Information" Proc. 7th Annual World Congress on ITS (2000)
Keiichi Yamamoto "Unten chuiryoku monitor" Motoring No. 10 (2000)
K. Yamamoto "Development of alertness-level-dependent headway distance warning system" JSAE Review 22 325-330 (2001)
Keiichi Yamamoto "Unten chuiryoku monitor no human interface" JSAE Vol. 56, No.3 "Unten chuiryoku monitor no human interface" JSAE Vol. 56, No. 3 (2002)
Keiichi Yamamoto "Chuiryoku tekiougata shakanryori keihou system no kaihatsu" JSAE collected papers Vol. 32, No.4 |
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| Introduction | : | This is the world's first system using road lanes. The attention level of the driver is estimated using fuzzy logic based on the vehicle's course deviations, corrective steering amounts, and the operation frequency of the indicators etc. The estimation is transmitted to the driver via a bar graph display every minute. The indication color is changed according to the attention level, and an attention reminder is sounded if necessary.
In addition, fragrance is disseminated with a time interval of 1/f noise during monotonous driving, which extends the time that the driver can maintain attention without discomfort. |
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