Collision Probability Apparatus Dynamic Calculation Origin
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Solution Overview
Problem
Existing collision avoidance systems inaccurately determine collision probability due to averaging past data when the target's movement direction suddenly changes, leading to lowered accuracy in predicting arrival positions.
Innovation Solution
A collision probability determination apparatus that specifies target positions on an X-Y plane, calculates a target path, and changes the calculation origin when the target path is detected as a straight line or related to a straight line, and the difference between last and current X-coordinates exceeds a threshold, allowing for real-time recalculations without averaging past data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the relative movement path is calculated with averaging by using past data, then the calculation is stable, but the accuracy in calculating the predicted arrival position is lowered when the movement direction of the target is suddenly changed
Solution Approach 1:
The patent applies dynamics by making the calculation origin variable rather than fixed. When a sudden change in movement direction is detected (through comparison of consecutive position data), the calculation origin is dynamically updated to the current position. This allows the system to adapt to changing motion patterns while maintaining calculation stability for normal movement, thereby resolving the contradiction between stability and accuracy.
2Device complexity
If the calculation origin is fixed, then the calculation process is simple, but the response to sudden changes in target movement direction is delayed
Solution Approach 1:
The patent implements feedback by continuously monitoring the target's position data and comparing consecutive positions to detect sudden movement changes. When such changes are detected, the calculation origin is updated accordingly. This feedback mechanism enables the system to respond to movement direction changes without significantly increasing calculation complexity, thus improving reliability while maintaining simplicity.
Data Source
AI summary
A collision probability determination apparatus includes a specifying means for specifying target positions on an X-Y plane, a calculation means for calculating a target path and calculating a predicted arrival position of the target on an X-axis, a determination means for determining probability of a collision between the vehicle and the target based on the predicted arrival position; and a calculation origin changing means for defining the target position specified last time as a last specified value, and defining the target position specified this time as a current specified value, and for, when detecting that the target path, whose end point is the last specified value, is a straight line and then if a difference value between X-coordinates of the last specified value and the current specified value exceeds a predetermined threshold, changing a calculation origin of the target path to the last specified value or the current specified value.