Collision Mitigation Timing Adjustment Based on Sensor Reliability
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Solution Overview
Problem
Existing collision mitigation systems face issues with false detection of collision objects due to low sensor reliability, leading to unnecessary drive assist operations, especially in adverse weather conditions or varying ambient brightness.
Innovation Solution
A collision mitigation apparatus that includes an object detecting section, a drive assisting section, and a reliability determining section, which sets the start timing for drive assist based on the detection reliability, using a combination of camera and radar sensors to accurately assess the reliability of detected collision objects and adjust the timing for initiating drive assist accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drive assist is performed whenever a collision object is detected, then collision avoidance capability is improved, but false detection causes unnecessary drive assist operations
Solution Approach 1:
The patent changes the parameter of drive assist timing based on detection reliability. When detection reliability is high, drive assist is performed earlier; when reliability is low, drive assist timing is delayed. This dynamic parameter adjustment resolves the contradiction by adapting the system response to the quality of detection data.
Solution Approach 2:
The patent introduces dynamic adjustment of drive assist start timing based on real-time detection reliability assessment. The system transitions from a static threshold-based approach to a dynamic reliability-proportional timing approach, allowing the drive assist timing to adapt continuously to changing detection conditions.
2Reliability
If drive assist timing is advanced to ensure collision avoidance, then safety is improved, but unnecessary drive assist increases due to false detections
Solution Approach 1:
The patent adjusts the drive assist timing parameter dynamically based on detection reliability. High reliability triggers earlier timing for maximum safety, while low reliability delays timing to avoid false activations, thus resolving the contradiction between safety and false operations.
Solution Approach 2:
The patent performs preliminary assessment of detection reliability before initiating drive assist. This preliminary action allows the system to prepare for drive assist only when confidence is sufficient, preventing unnecessary operations while maintaining readiness for genuine threats.
3Adaptability or versatility
If detection threshold is lowered to detect more collision objects, then detection coverage is improved, but false detection rate increases
Solution Approach 1:
The patent dynamically changes the effective detection threshold based on environmental conditions and sensor reliability assessments. Instead of using a fixed low threshold that causes false detections, the system adjusts the threshold parameter according to current detection reliability, maintaining both coverage and precision.
Data Source
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AI summary
A collision mitigation apparatus includes an object detecting section for detecting a collision object present in front of an own vehicle on which the collision mitigation apparatus is mounted, a drive assisting section that performs drive assist for avoiding a collision between the collision object detected by the object detecting section and the own vehicle, or mitigate damage to the own vehicle due to the collision, a reliability determining section for determining reliability of detection result of the object detecting section, and a timing setting section for setting start timing to start the drive assist by the drive assisting section in accordance with the reliability determined by the reliability determining section.