Vehicle Stop Support System with Dynamic Lateral Acceleration Control
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Solution Overview
Problem
Current vehicle stop support systems lack the ability to effectively utilize high-accuracy geographic maps and vehicle-mounted cameras to prioritize driver safety and minimize rear-end collision risks during emergency vehicle stops, potentially worsening the driver's condition due to excessive lateral acceleration.
Innovation Solution
A vehicle stop support system that includes an abnormality detection part, allowable value setting part, candidate detection part, acceleration estimation part, risk estimation part, and vehicle control part to identify suitable stop points with minimal lateral acceleration and low rear-end collision risk, prioritizing driver safety and quick rescue operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the vehicle stops quickly at the nearest stop point candidate, then the response time for rescue is reduced, but the lateral acceleration becomes excessively large causing the driver's posture to become imbalanced and worsening the driver's condition
Solution Approach 1:
The system dynamically adjusts the allowable lateral acceleration parameter based on the detected abnormality type and driver condition. For severe abnormalities like loss of consciousness, a lower allowable lateral acceleration is set to prioritize driver safety, while for minor conditions, a higher value allows faster stopping. The stop point selection is optimized by evaluating both lateral acceleration and rear-end collision risk parameters to find the best compromise between speed and safety.
2Stability of the object's composition
If the allowable lateral acceleration is set to a small value to suppress lateral acceleration, then the driver's posture stability is improved, but the vehicle traveling speed to reach stop point decreases
Solution Approach 1:
The system dynamically adjusts the allowable lateral acceleration based on the detected abnormality condition. For severe abnormalities such as loss of consciousness or medical emergencies, a lower allowable lateral acceleration is applied to ensure driver safety and posture stability. For minor conditions like temporary distraction or fatigue, a higher allowable lateral acceleration permits faster vehicle response. This dynamic parameter adjustment optimizes the balance between driver protection and rescue efficiency.
3Reliability
If the vehicle stops at a stop point with low rear-end collision risk, then the safety of the stopped vehicle is improved, but the distance to travel increases and stopping time is delayed
Solution Approach 1:
The system evaluates multiple stop point candidates by calculating both rear-end collision risk and lateral acceleration for each candidate. The stop point selection optimizes the balance between safety and response time by choosing the candidate that provides adequate protection while minimizing travel distance. The system considers road geometry, traffic flow patterns, and vehicle dynamics to identify the optimal stop location that satisfies both safety requirements and rescue timing constraints.
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 an allowable lateral acceleration, based on a physical abnormality of a driver; detects a plurality of stop point candidates in a traveling direction of a vehicle; estimates a lateral acceleration to be generated during traveling of the vehicle to each of the candidates; estimates a rear-end collision risk that the vehicle will be rear-ended by a following vehicle; 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 which is lowest in terms of the rear-end collision risk.