Object Detection Device Lateral Speed Upper Limit
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Solution Overview
Problem
Conventional pre-crash safety systems face challenges in accurately detecting lateral speed and acceleration of objects, leading to potential unnecessary actuation of safety devices due to detection errors, especially when objects are diagonally forward of a vehicle.
Innovation Solution
An object detection device that decomposes speed and acceleration into directional components, using angle information to set an upper limit for lateral speed and acceleration, thereby controlling and correcting detected values to prevent false actuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the width of the region is expanded based on detected lateral speed and acceleration to cover diagonally moving objects, then the detection coverage is improved, but false actuation occurs due to detection errors
Solution Approach 1:
The patent changes the parameter used for region width determination from directly using detected lateral speed/acceleration to using an upper limit value derived from the relationship between angle and speed. This parameter transformation filters out erroneous detection values while preserving valid detection coverage for diagonally moving objects.
Solution Approach 2:
The patent introduces an intermediary element (upper limit value based on angle-speed relationship) between the raw detection data and the region width calculation. This intermediary acts as a filter to eliminate detection errors while maintaining accurate coverage for legitimate objects.
2Reliability
If the region width is increased to account for high lateral speed objects, then collision risk coverage is improved, but unnecessary safety device actuation occurs
Solution Approach 1:
The patent transforms the parameter for region width calculation from raw lateral speed/acceleration values to upper limit values based on angle relationships. This ensures the region is sufficiently large to cover high-speed diagonal objects while preventing unnecessary actuation from erroneous detection values.
3Measurement precision
If lateral speed and acceleration detection is performed to determine cutting objects, then object classification accuracy is improved, but detection errors cause false positives
Solution Approach 1:
The patent introduces an intermediary validation mechanism using angle-speed relationships to verify detected lateral speed and acceleration values. This intermediary check filters out false detections while preserving accurate object classification for genuine cutting objects.
Solution Approach 2:
The patent implements a feedback mechanism where the detected angle information is used to validate the合理性 of lateral speed and acceleration measurements. This feedback loop ensures that only physically plausible detection values are used for object classification, reducing false positives.
Data Source
AI summary
An object detection device detects an object moving in the area surrounding an own object. The object detection device includes: an information obtainment unit which obtains an object speed value that is at least one of a speed and an acceleration of the object in a lateral direction which is orthogonal to a predetermined direction of the area surrounding the own object; and an upper limit setting unit which sets an upper limit of the object speed value on the basis of angle information that is the relationship indicating an angle of a moving direction of the object with respect to the predetermined direction.