Vehicle Body Detection Using Dynamic Frame Alignment
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Solution Overview
Problem
Existing vehicle-mounted radar devices face challenges in accurately grouping detected acquisition points, often incorrectly estimating multiple bodies as a single entity, especially when vehicles are moving adjacent to each other or at oblique angles.
Innovation Solution
A body detection apparatus and method that calculates movement directions of acquisition points and pre-sets a frame aligned with the assumed traveling direction of detected bodies, allowing for accurate grouping by determining points within the frame with aligned movement directions as belonging to the same body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If grouping is performed based on distance and angle thresholds, then grouping speed is improved, but grouping accuracy deteriorates causing false merging of multiple bodies
Solution Approach 1:
The patent changes the grouping parameters from static distance and angle thresholds to dynamic parameters based on body size and shape characteristics. By introducing size information and shape matching criteria, the system maintains high grouping speed while improving accuracy to prevent false merging of separate bodies.
Solution Approach 2:
The patent makes the grouping criteria dynamic by adapting them to the detected body characteristics. Instead of fixed thresholds, the system adjusts grouping parameters based on the size and shape of detected bodies, allowing accurate differentiation between single bodies and multiple adjacent bodies while maintaining efficient processing.
2Device complexity
If simple threshold-based grouping is used, then device complexity is reduced, but reliability of body detection deteriorates
Solution Approach 1:
The patent enhances detection reliability by introducing size and shape parameters to the grouping process. These additional parameters allow the system to reliably distinguish between acquisition points from single bodies versus multiple bodies, improving overall detection reliability without requiring complex computational algorithms.
Data Source
AI summary
A body detection apparatus includes: movement direction calculation portion that calculates a movement direction of each of acquisition points by using signals that show the acquisition points and that are obtained through detection of a body present around the vehicle; and determination portion that pre-sets a frame commensurate with a shape of a body as a detection object, and for pre-setting for the frame a reference traveling direction as an assumed traveling direction of the body, and for determining, among the acquisition points, acquisition points present within the frame whose reference traveling direction is aligned with the movement direction as being acquisition points of a single body.