Vehicle Control Apparatus Object Width Adjustment for Collision Avoidance
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Solution Overview
Problem
Existing vehicle control systems face issues with accurate collision avoidance control due to erroneous object width calculations, leading to unnecessary operations when the overlap ratio is affected by errors in object width recognition.
Innovation Solution
A vehicle control apparatus that includes an object recognizing unit, collision determining unit, lateral width calculating unit, overlap ratio calculating unit, and timing setting unit, which adjusts the object width when the overlap ratio is below a threshold to minimize the impact of errors on collision avoidance control timing, ensuring appropriate operation timing by prioritizing the setting based on the corrected overlap ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the object width is calculated based on the captured image, then the overlap ratio can be determined, but the object width may be erroneously recognized as greater than the actual width, leading to unnecessary collision avoidance operations
Solution Approach 1:
The patent changes the object width parameter based on the overlap ratio value. When the overlap ratio is below a threshold, a first (smaller) object width is used; when the overlap ratio is above the threshold, a second (larger) object width is used. This dynamic parameter adjustment prevents erroneous collision avoidance operations while maintaining measurement accuracy.
2Reliability
If the object width is reduced when overlap ratio is low, then the impact of errors on collision avoidance control timing is suppressed, but the object width must be dynamically adjusted based on overlap ratio threshold
Solution Approach 1:
The patent implements dynamic parameter change by selecting different object width values based on the overlap ratio threshold comparison. This simple threshold-based parameter switching resolves the contradiction by maintaining control timing accuracy without requiring complex error correction mechanisms.
3Loss of time
If the overlap ratio is used to determine collision avoidance control timing, then the control can be performed at appropriate timing, but errors in object width calculation affect the operation timing
Solution Approach 1:
The patent dynamically changes the object width parameter based on the calculated overlap ratio. When the overlap ratio indicates low collision risk (below threshold), a smaller object width is used to prevent premature collision avoidance operations. This ensures control timing is based on accurate risk assessment rather than erroneous width measurements.
Data Source
AI summary
When a likelihood of a collision between an object and an own vehicle is determined to be present, an vehicle control apparatus calculates an object width indicating a size of the object in a lateral direction and an overlap ratio indicating a proportion of an amount of overlap in the lateral direction between the calculated object width and a determination area that is virtually set ahead of the own vehicle. Based on the calculated overlap ratio, an operation timing for a collision avoidance control is set. The object width is changed when the overlap ratio is less than a predetermined threshold such that the object width is less than the object width when the overlap ratio is greater than the predetermined threshold. The operation timing for the collision avoidance control is set based on a new overlap ratio calculated based on the determination area and the object width after change.