Axial Displacement Estimation Device for Radar Accuracy
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Solution Overview
Problem
The estimation accuracy of axial displacement angles in on-vehicle radar apparatuses is deteriorated due to the exclusion of certain axial displacements, leading to inaccuracies in determining conclusive axial displacement angles.
Innovation Solution
An axial displacement estimation device is developed, comprising an angle calculation unit, an average value calculation unit, and a utilization determination unit, which calculates and averages axial displacement angles within a predetermined range, and determines whether to utilize these values based on error and retry conditions to improve estimation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If axial displacement values satisfying exclusion conditions are excluded from calculation, then the device complexity is reduced, but the measurement precision of axial displacement angle deteriorates
Solution Approach 1:
The patent changes the parameter used for exclusion from absolute axial displacement magnitude to axial displacement angle range. Instead of excluding based on whether displacement exceeds a threshold, the system calculates angles and excludes only those falling within a predetermined angle range, thereby improving accuracy while maintaining simple exclusion logic.
Solution Approach 2:
The patent introduces dynamic recalculation capability. When the determination unit finds that all calculated axial displacement angles fall within the exclusion range, the system dynamically recalculates using a different set of axial displacement values, allowing the calculation process to adapt and produce accurate results under varying conditions.
2Reliability
If all calculated axial displacement angles fall within the exclusion range, then the utilization determination unit can identify this condition, but no conclusive axial displacement angle can be determined without recalculation
Solution Approach 1:
The determination unit provides feedback when all axial displacement angles fall within the exclusion range. This feedback triggers the angle calculation unit to recalculate using different axial displacement values, creating a closed-loop system that ensures accurate results while maintaining efficiency through conditional recalculation only when necessary.
3Productivity
If the average value of axial displacement angles is calculated and used as estimation result, then the productivity is improved, but the measurement precision may deteriorate if erroneous values are included
Solution Approach 1:
The determination unit performs preliminary verification before the average value is finalized as the estimation result. By checking whether all axial displacement angles fall within the exclusion range and triggering recalculation when needed, the system ensures that only accurate values are averaged, preventing erroneous values from degrading measurement precision.
Data Source
AI summary
An axial displacement angle estimation device repeatedly calculates an axial displacement angle based on the detection result of the radar apparatus. The axial displacement angle estimation device extracts the axial displacement angle included in a predetermined extraction angle range among a plurality of axial displacement angles, and calculate an average value of the extracted plurality of axial displacement angles to be an axial displacement angle average value. The axial displacement angle estimation device determines, based on the axial displacement angle average value, whether a predetermined allowable condition is met. The axial displacement angle estimation device utilizes, when determined that the predetermined allowable condition is met, the axial displacement angle average value as an estimation result of the axial displacement angle.