Vehicle Target Detection Reliability via Overlap Time
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Solution Overview
Problem
Conventional target detection systems face reliability issues when a target moves out of the overlapping detection area of multiple sensors, leading to a lowered target reliability degree, which can prevent necessary vehicle control actions, such as automatic control, especially when a pedestrian is detected in an area only detectable by one sensor.
Innovation Solution
A target detection apparatus comprising a first target detection section (millimeter wave radar) and a second target detection section (image sensor) with a reliability degree setting section that sets the target reliability based on the overlap detection time when both sections continuously detect the target, ensuring higher reliability even when the target is detected in non-overlapping areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the target reliability degree is lowered when a target is detected in a non-overlapping detection area, then the false detection rate is reduced, but the control performance deteriorates because necessary control actions cannot be performed
Solution Approach 1:
The system performs preliminary tracking of the target in the non-overlapping detection area before making a reliability determination. By continuously monitoring the target's position and movement characteristics over a predetermined time period, the system gathers sufficient information to assess whether the target is genuine, thereby enabling informed control decisions without immediately lowering reliability
Solution Approach 2:
The target reliability degree is made dynamic rather than static. The system adjusts the reliability degree based on real-time detection conditions: maintaining high reliability when targets are consistently detected through tracking in non-overlapping areas, while allowing reliability to be lowered only after confirmed false detection patterns emerge
2Ease of operation
If the target reliability degree is maintained high when a target is detected in a non-overlapping detection area, then the control performance is improved, but the false detection rate increases
Solution Approach 1:
The system implements a feedback mechanism where detection results from the non-overlapping area are continuously monitored and fed back into the reliability assessment. The tracking information and detection consistency feedback enable the system to distinguish between genuine targets and false detections, adjusting the target reliability degree accordingly to balance control performance and detection accuracy
Data Source
AI summary
A target detection apparatus includes a first target detection section which detects a target which exists ahead of a vehicle and has a height sufficient to strike against the vehicle; a second target detection section which detects the target in an area different from an area in which the target is detected by the first target detection section, and a reliability degree setting section which sets a target reliability degree indicating probability that the target exists. When the target is detected only by the first target detection section or the second target detection section, and after the target is detected by both the first and the second target detection sections, the reliability setting section sets the target reliability degree based on an overlap detection time which is a period of time during which both the first and the second target detection sections continuously detect the target.