Vehicle Rear Obstacle Warning System with Dynamic Trajectory Prediction
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Solution Overview
Problem
Existing vehicle warning systems fail to provide timely warnings for obstacles approaching from the side at high speeds, especially in angled parking situations, as they do not accurately predict collisions due to the lack of consideration for the approach angle and relative motion of obstacles.
Innovation Solution
A method and system that detect and evaluate the relative position, speed, and approach angle of potential obstacles using sensors to predict their trajectory and the trajectory of the subject vehicle, generating a warning based on the probability of intersection with a critical zone moving with the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a warning zone is defined behind the subject vehicle and a warning is produced when an obstacle enters this zone, then the system provides a warning for obstacles directly behind the vehicle, but the warning is generated too late for obstacles approaching from the side at high speed
Solution Approach 1:
The system performs preliminary action by predicting the future trajectory of approaching obstacles and determining the probability of their intersection with the critical zone before the obstacle actually enters it. This allows the warning to be generated in advance, providing the driver with sufficient reaction time while maintaining high warning accuracy through probabilistic prediction based on detected position and speed.
2Device complexity
If the system only monitors obstacles within a fixed warning zone, then the system structure remains simple, but it cannot accurately predict collisions when obstacles approach at oblique angles
Solution Approach 1:
The system applies dynamics by transitioning from a static warning zone to a dynamic critical zone that moves together with the subject vehicle. The evaluation unit continuously updates the position and trajectory of the critical zone based on the vehicle's motion, enabling accurate collision prediction for obstacles approaching at any angle while maintaining a relatively simple system structure that builds upon existing sensor and warning components.
Data Source
AI summary
A method and system produce a warning signal to warn a driver of a vehicle about a potential obstacle crossing behind the vehicle, for example as the vehicle is backing out of a parking space. The system and method use a sensor to detect, monitor and track the position and velocity of a potential obstacle relative to the subject vehicle, in a detection space behind and to the sides of the vehicle, preferably to predict the probability that the trajectory of the potential obstacle will intersect with the trajectory of the subject vehicle at a critical time.