Side Mirror Retraction Control for Low-Speed Narrow-Space Collision Avoidance
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Solution Overview
Problem
In traffic jams or narrow spaces, vehicles risk colliding with side mirrors due to the proximity of bicycles or motorcycles, especially when there is insufficient space on the side, such as when parked vehicles obstruct the path.
Innovation Solution
A side mirror control device equipped with a mobile object detection unit and a side mirror control unit that rapidly retracts the side mirror when a mobile object is detected within a set warning area, provided the vehicle is traveling below a certain speed threshold, and adjusts retraction based on passage space width and object size to prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the side mirror is retracted when a mobile object is detected in the side warning area, then the risk of collision with bicycles or motorcycles is reduced, but false retraction may occur when passage space is sufficient
Solution Approach 1:
The system changes the retraction decision based on the parameter of passage space width. When the minimum width of passage space is equal to or greater than a first threshold, retraction is suppressed even if a mobile object is detected. This parameter-based adaptation prevents false retraction while maintaining collision prevention in narrow spaces.
Solution Approach 2:
The system uses feedback from the passage space detection unit to modulate the retraction control. The detection of sufficient passage space width provides feedback that suppresses unnecessary retraction commands, allowing the system to adapt its response based on actual environmental conditions rather than simply reacting to mobile object detection.
2Adaptability or versatility
If the side mirror retraction is suppressed when passage space is sufficient, then false retraction is avoided, but collision risk increases in narrow spaces
Solution Approach 1:
The system dynamically changes the retraction control state based on the passage space width parameter. When the minimum width is below the first threshold, the system transitions to a high-alert state where mobile object detection immediately triggers retraction, ensuring collision prevention in narrow spaces while avoiding false retraction in open areas.
3Speed
If the side mirror is rapidly retracted at higher vehicle speeds, then collision response is faster, but the side mirror may not have time to return to normal position before next detection
Solution Approach 1:
The system changes the retraction control based on vehicle speed parameter. When vehicle speed is below the side mirror retraction threshold, rapid retraction is permitted. When speed exceeds the threshold, retraction is suppressed, allowing the mirror adequate time to return to normal position and preventing operation under high-speed conditions where rapid movement would be unsafe.
Data Source
AI summary
A side mirror control device for controlling side mirrors of a vehicle includes a mobile object detection unit that detects entry of a mobile object into a side warning area set on left and right sides of the vehicle, and a side mirror control unit that rapidly retracts the side mirror on the side corresponding to the side warning area when the entry of the mobile object into the side warning area is detected when a vehicle speed of the vehicle is lower than a side mirror retraction threshold.