Vehicle Stop Support System Using Adaptive Lateral Acceleration
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Solution Overview
Problem
Current vehicle stop support systems lack the ability to effectively utilize advanced technologies like high-accuracy geographic maps and vehicle-mounted cameras to prioritize driver safety and rescue in emergency conditions by optimizing vehicle stops based on driver physical abnormalities.
Innovation Solution
A vehicle stop support system that includes an abnormality detection module, target time period setting, allowable lateral acceleration setting, candidate detection, and vehicle control to identify and prioritize safe stop points minimizing lateral acceleration and ensuring quick rescue, with adaptive settings for consciousness, eye state, line-of-sight, and center-of-gravity position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the vehicle travels to the stop point as quickly as possible, then the rescue operation can be started quickly, but the lateral acceleration becomes excessively large causing the driver's posture to become imbalanced
Solution Approach 1:
The system dynamically changes the allowable lateral acceleration parameter based on the driver's detected physical condition. When the driver is conscious and able to maintain posture, a larger allowable lateral acceleration is set to prioritize quick arrival. When the driver is unconscious or unable to maintain posture, a smaller allowable lateral acceleration is set to prioritize driver safety, thus resolving the contradiction between speed and driver protection
Solution Approach 2:
The system makes the vehicle's acceleration profile dynamic by adjusting the allowable lateral acceleration in real-time based on driver condition monitoring. This dynamic adjustment allows the vehicle to optimize its travel profile to each stop point candidate, balancing the need for quick arrival with the need to protect the driver based on their current physical state
2Object-affected harmful factors
If a small lateral acceleration is applied to maintain driver posture, then driver safety is improved, but the time to reach the stop point increases
Solution Approach 1:
The system changes the allowable lateral acceleration parameter based on driver condition. When the driver is in good condition (conscious, able to maintain posture), the system allows larger lateral acceleration to minimize travel time. When the driver's condition deteriorates (unconscious, unable to maintain posture), the system reduces the allowable lateral acceleration to protect the driver, thus dynamically balancing safety and time
3Speed
If the allowable lateral acceleration is set to a large value, then the vehicle can travel quickly to the stop point, but the driver's posture becomes imbalanced when the driver is in severe abnormality
Solution Approach 1:
The system uses feedback from the abnormality detection part to continuously monitor the driver's physical condition and adjusts the allowable lateral acceleration accordingly. When the driver is conscious and maintaining posture, the system allows higher speeds with larger lateral acceleration. When the driver becomes unconscious or unable to maintain posture, the system reduces the allowable lateral acceleration to prevent further imbalance, thus using feedback to balance speed and driver protection
Solution Approach 2:
The system dynamically changes the allowable lateral acceleration parameter based on the driver's detected condition. For severe abnormalities where the driver cannot maintain posture, the system sets a smaller allowable lateral acceleration to prioritize driver safety over speed. For less severe conditions, the system allows larger lateral acceleration to enable faster travel, thus resolving the contradiction through parameter adaptation
Data Source
AI summary
Provided is a vehicle stop support system for supporting vehicle stop in an emergency condition. The vehicle stop support system sets a target time period based on physical abnormality of a driver; sets an allowable lateral acceleration, based on the abnormality; estimates a time period required to reach each of a plurality of stop point candidates; estimates a lateral acceleration to be generated during traveling of a vehicle to each of the candidates; sets a stop point; and controls the vehicle to travel to the stop point and stop at the stop point. The system is operable to set, as the stop point, one of the candidates which satisfies a condition that the lateral acceleration estimated with respect thereto is equal to or less than the allowable lateral acceleration, and the required time period estimated with respect thereto is equal to or less than the target time period.