Drive Assist Apparatus Target Stop Position Offset
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Solution Overview
Problem
Conventional drive assisting apparatuses often fail to accurately assist vehicle stopping at traffic lights due to the presence of preceding vehicles, leading to shifts in the actual stopping position from the intended traffic light point.
Innovation Solution
The drive assisting apparatus determines a target stop position by subtracting an estimated variation distance from the reference stop position, adjusts vehicle speed based on this distance, and learns from past stop position data to optimize stop assistance timing, incorporating factors like elapsed time and past stop position information to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the drive assisting apparatus notifies the driver to stop at the traffic light point, then the stop assistance timing is optimized for reaching the intersection, but the actual stopping position shifts forward due to the presence of preceding vehicles
Solution Approach 1:
The system performs preliminary estimation of the variation distance between the traffic light point and the actual stop position caused by preceding vehicles. By calculating this offset distance in advance based on traffic flow conditions, the system can adjust the target stop position before issuing stop assistance notifications, ensuring the vehicle stops at the correct position rather than shifting forward
Solution Approach 2:
The system uses feedback from traffic light information, vehicle speed, and distance data to continuously adjust the target stop position. By monitoring the relationship between the notified stop position and actual stopping behavior, the system refines its estimation of the variation distance to improve stopping position accuracy over time
2Measurement precision
If the system adjusts the stop assistance timing to account for preceding vehicles, then the stopping position accuracy improves, but the system complexity increases due to additional calculations
Solution Approach 1:
The system changes the parameter of target stop position by subtracting the estimated variation distance from the traffic light point. This parameter adjustment allows the system to maintain simple control logic while achieving accurate stopping positions, avoiding the need for complex multi-variable optimization algorithms
Data Source
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AI summary
A drive assisting apparatus (1) includes an assistance controller (50) configured to create a target vehicle travelling state in which a timing to start stop assistance is changed in accordance with an elapsed time elapsed from at the time a traffic light, which exists in an advancing direction of a vehicle (2), is switched to a stop display, and an assisting device (4) configured to be able to output drive assisting information for assisting the driving of the vehicle (2) based on the target travelling state amount of the vehicle (2).