Rear Collision Warning Tracking Using Vehicle Length Correction
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Solution Overview
Problem
Existing rear cross traffic alert (ROTA) systems face challenges in accurately tracking target vehicles when they cross the rear of a subject vehicle, leading to potential errors in collision warning generation and cancellation.
Innovation Solution
A collision warning control apparatus that calculates the overall length of a target vehicle at different time points based on the position of a reference point and a tracking point, compares these lengths to determine a reference overall length, and adjusts the reference position of the target vehicle accordingly to control the collision warning effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ROTA system tracks the target vehicle using radar to detect the vehicle crossing the rear, then the collision warning can be generated, but the tracking point position shifts from the front surface to the rear surface of the target vehicle causing tracking errors
Solution Approach 1:
The system performs preliminary actions by calculating the overall length of the target vehicle and determining reference positions at multiple time points before the tracking point shifts to the rear surface. This allows the system to establish a baseline for correcting future tracking errors when the shift occurs
Solution Approach 2:
The system implements feedback by continuously monitoring the position of the tracking point and comparing it with the calculated reference position. When a discrepancy is detected (indicating the tracking point has shifted to the rear surface), the system uses the stored overall length information to correct the tracking error and maintain accurate collision warning control
2Duration of action of moving object
If the tracking point position shifts during target vehicle movement, then the system can continue tracking, but the position accuracy deteriorates leading to potential early cancellation of collision warnings
Solution Approach 1:
The system calculates and stores the overall length of the target vehicle and establishes reference positions at multiple time points during the tracking process. This preliminary information is prepared before the tracking point shifts, enabling accurate position determination throughout the entire tracking duration
Solution Approach 2:
The system continuously compares the detected tracking point position with the calculated reference position. When the tracking point shifts to the rear surface causing position errors, the feedback mechanism detects this discrepancy and applies corrections using the stored overall length information, maintaining accurate tracking throughout the vehicle's movement
Data Source
AI summary
Disclosed is a collision warning control apparatus that obtains position and speed information of a reference point for a target vehicle at a first time point, determines a position of the reference point at a second time point based on the position and speed information of the reference point for the target vehicle at the first time point, calculates a first overall length of the target vehicle based on the position of the reference point at the second time point, determines a position of the reference point at a third time point, and calculates a second overall length of the target vehicle. The apparatus determines a reference position of the target vehicle at the third time point based on a difference between the first overall length and the second overall length, and controls collision warning for the target vehicle based on the reference position of the target vehicle.