Traveling Direction Vector Reliability Determination for Collision Prediction
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Solution Overview
Problem
Existing pre-crash safety systems face challenges in accurately predicting collisions due to unreliable traveling direction vectors, leading to unnecessary activation of safety measures.
Innovation Solution
A method to calculate the reliability of traveling direction vectors by distinguishing between normally recognized and estimated coordinate points, allowing for a more accurate assessment of collision predictions and reducing unnecessary safety measure activations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If estimated coordinate points are used to calculate the traveling direction vector, then the calculation can be performed even when normally recognized coordinate points are insufficient, but the reliability of the traveling direction vector decreases
Solution Approach 1:
The patent applies local quality by differentiating between normally recognized coordinate points and estimated coordinate points, assigning different reliability weights to each. The reliability calculation section computes the traveling direction vector reliability based on the proportion of normally recognized coordinate points versus estimated coordinate points, thereby locally adjusting the quality assessment according to the source of each coordinate point.
2Measurement precision
If the reliability calculation is performed based on the proportion of normally recognized coordinate points, then the accuracy of collision prediction is improved, but the complexity of the calculation process increases
Solution Approach 1:
The patent introduces an intermediary reliability value that mediates between the raw coordinate data and the final collision prediction. The reliability calculation section computes a reliability value based on the proportion of normally recognized coordinate points, and this reliability value serves as an intermediary factor that modulates the collision prediction result, thereby improving accuracy without requiring complete redesign of the prediction system.
3Ease of operation
If the traveling direction vector reliability is not calculated, then the system operation is simpler, but unnecessary safety measures may be activated due to inaccurate collision predictions
Solution Approach 1:
The patent implements feedback by calculating the traveling direction vector reliability and using this reliability information to modulate the collision prediction output. The reliability calculation section provides feedback about the quality of the input data, and this feedback is used to adjust the safety measure activation threshold, thereby preventing unnecessary activations while maintaining system simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The reliability calculation of traveling direction vectors enhances the accuracy of collision predictions, thereby minimizing unnecessary operations of safety devices.
Implementation Method 1
a radar device that obtains position coordinate points and a relative velocity of another vehicle
Data Source
AI summary
There is provided a traveling direction vector reliability determination method in which reliability of a traveling direction vector of another vehicle is calculated so as to increase reliability of a collision prediction. The traveling direction vector reliability determination method determines the reliability of the traveling direction vector when the traveling direction vector is calculated based on position coordinate points of a target, which are calculated by a radar device. The method includes a traveling direction vector calculation step of calculating, based on a movement history of the position coordinate points, the traveling direction vector of the target; and a reliability calculation step of calculating, in a case where the position coordinate points include normally recognized coordinate points and estimated coordinate points, the reliability of the traveling direction vector, based on at least one of information about the normally recognized coordinate points and information about the estimated coordinate points.