Pedestrian Collision Avoidance Control With Dynamic Predicted Track Width
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Solution Overview
Problem
Existing collision avoidance support devices in vehicles often execute unnecessary automatic brake and steering controls when pedestrians are positioned outside the travel lane, as they do not accurately differentiate between the risk of collision based on the pedestrian's lane position, leading to inefficient and potentially uncomfortable control activations.
Innovation Solution
A collision avoidance support device that adjusts its operation conditions based on the relative position of the pedestrian to the travel lane, enlarging the vehicle's predicted track width when a pedestrian is on the lane to prioritize necessary collision avoidance controls and reducing the width when the pedestrian is outside the lane to minimize unnecessary controls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the variable width of the vehicle predicted track is enlarged to detect pedestrians outside the travel lane, then the detection capability of pedestrians is improved, but unnecessary automatic brake control and automatic steering control are executed
Solution Approach 1:
The patent applies local quality by differentiating the vehicle predicted track width based on the pedestrian's position relative to the travel lane. When a pedestrian is detected on the travel lane, the track width is enlarged to ensure detection and collision avoidance. When the pedestrian is outside the travel lane, the track width is not enlarged, preventing unnecessary control execution. This localized adjustment of the track width parameter resolves the contradiction between detection capability and unnecessary control activation.
2Ease of operation
If the variable width of the vehicle predicted track is reduced to minimize unnecessary controls, then the comfort of occupants is improved, but the detection capability of pedestrians on the travel lane is reduced
Solution Approach 1:
The patent implements dynamics by making the vehicle predicted track width a dynamic parameter that changes based on the pedestrian's position. The control unit continuously monitors the pedestrian's position relative to the travel lane and adjusts the track width accordingly. This dynamic adjustment ensures that the track width is enlarged only when necessary (pedestrian on lane) and reduced when unnecessary (pedestrian outside lane), thereby maintaining both detection capability and occupant comfort.
3Device complexity
If the variable width of the vehicle predicted track is set to a fixed value, then the system complexity is reduced, but the accuracy of collision risk assessment is reduced
Solution Approach 1:
The patent applies parameter changes by modifying the vehicle predicted track width parameter based on the pedestrian's position. Instead of using a fixed track width, the control unit adjusts this parameter dynamically: enlarging it when a pedestrian is on the travel lane and maintaining a smaller width when the pedestrian is outside the lane. This parameter adjustment enables accurate collision risk assessment without requiring complex additional hardware or systems.
Data Source
AI summary
A collision avoidance support device comprises target detection unit, target type determination unit, relative position determination unit, target track prediction unit, and vehicle track prediction unit, obstacle determination unit. The vehicle track prediction unit is configured to enlarge said width of a vehicle predicted track compared with a case where an enlargement condition is not satisfied when the enlargement condition is satisfied. The enlargement condition is satisfied when the relative position determination unit detects that a target determined to be a pedestrian by the target type determination unit is positioned on a travel lane at least once.