Vehicle Collision Detection High-Risk Region Logic
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Solution Overview
Problem
Collision detection devices struggle to determine an optimal collision detection time period when multiple obstacle objects are present on the road, leading to reduced detection efficiency for moving objects that do not require immediate notification to the driver.
Innovation Solution
A collision detection device with a computer system that includes an area determination part and a collision detection part, which determines a high-risk region based on the farthest feature point of detected obstacle objects, allowing for a dynamic adjustment of the collision detection time period based on the presence and location of moving objects relative to these obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the high-risk region is extended toward behind the stopped vehicle to detect all moving objects, then the detection coverage is improved, but the collision detection time period is reduced unnecessarily for objects that do not require immediate notification
Solution Approach 1:
The patent applies local quality by differentiating the collision detection time period based on the local position of the moving object within the high-risk region. Objects in specific sub-regions (e.g., directly behind stopped vehicles) trigger a reduced collision detection time period, while objects in other areas use the standard time period. This resolves the contradiction by making the high-risk region coverage comprehensive while avoiding unnecessary time period reductions for low-priority objects.
2Loss of time
If the high-risk region is reduced to avoid detecting unnecessary moving objects, then the collision detection time period is maintained, but moving objects that need notification may be missed
Solution Approach 1:
The patent segments the high-risk region into multiple sub-regions with different detection requirements. By dividing the monitoring space into zones behind different stopped vehicles and applying position-based logic, the system ensures that moving objects in critical zones trigger reduced collision detection time periods while maintaining overall detection reliability. This resolves the contradiction by ensuring no important objects are missed while avoiding unnecessary time period reductions.
Data Source
AI summary
A collision detection device detects a probability of whether a vehicle will collide with a detected moving object. An ECU determines a high-risk region measured by a predetermined distance in a forward moving direction of the vehicle from a farthest feature point obtained from a farthest-located obstacle object detected on a road's shoulder. When the moving object is detected in the high-risk region, the ECU reduces a collision detection time-period within which the vehicle must detect whether the vehicle would collide with the moving object. The reduced collision detection time-period is shorter than a collision detection time-period to be used when the moving object is detected outside of the high-risk region.