Vehicle Object Detector Steering Angle Adaptation
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Solution Overview
Problem
Conventional object detection systems in vehicles struggle to accurately detect objects when the vehicle is turning, as they disable the detection function at prescribed steering angles to maintain accuracy, potentially missing objects that need to be detected.
Innovation Solution
An object detection system that adjusts the prescribed steering angle range based on vehicle velocity, allowing detection even at wider angles by enabling the detection function when the vehicle is moving slowly or stopped, ensuring accuracy while enabling detection in a broader range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detection function is disabled when the steering angle exceeds a prescribed angle, then detection accuracy is ensured, but the detection coverage is reduced
Solution Approach 1:
The patent applies dynamics by making the steering angle threshold variable rather than fixed. The controller dynamically adjusts the prescribed steering angle range based on real-time vehicle velocity feedback. When velocity is low, the threshold is relaxed to allow detection at wider steering angles; when velocity is high, the threshold is tightened to maintain accuracy. This dynamic adaptation resolves the contradiction between accuracy and coverage.
Solution Approach 2:
The patent changes the parameter of the steering angle threshold based on another parameter (vehicle velocity). By establishing a relationship where the prescribed steering angle range varies with velocity, the system adapts its detection criteria to current operating conditions. This parameter change allows the system to maintain high accuracy during high-speed operation while expanding detection coverage during low-speed maneuvering.
2Adaptability or versatility
If the detection function is always enabled, then detection coverage is maximized, but detection accuracy deteriorates during turning
Solution Approach 1:
The system uses dynamic control where the detection function's operational threshold is continuously adjusted based on vehicle velocity. During turning maneuvers at low velocity, the system permits detection at wider angles; during high-velocity operation, it restricts detection to narrower angles. This dynamic adjustment maintains accuracy while preserving coverage.
Solution Approach 2:
The controller implements feedback control by monitoring vehicle velocity and using this information to adjust the prescribed steering angle range. The velocity feedback allows the system to intelligently modulate detection sensitivity, preventing false detections during high-speed turns while maintaining detection capability during low-speed maneuvering where wider angle detection is safe and useful.
Data Source
AI summary
An object detection circuit detects an object moving in a periphery of a vehicle by a frame correlation method that uses a plurality of shot images captured at successive times. A state judgment part disables a detection function of the object detection circuit when a steering angle of an own vehicle is not in a prescribed steering angle range. Then, a condition changer changes the prescribed steering angle range corresponding to a condition of the steering angle in accordance with a velocity of the own vehicle. Therefore, the condition changer can relax the condition for enabling the detection function in accordance with the velocity of the own vehicle within a range where detection accuracy is ensured.