Radar Axis-Misalignment Estimation Using Self-Diagnosis
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Solution Overview
Problem
Existing axis-misalignment estimation devices for radar systems require separate installation of an imaging device to determine axis misalignment, complicating the device configuration.
Innovation Solution
An axis-misalignment estimation device that estimates the axis-misalignment angle of a radar device using multiple estimation methods based solely on radar detection results, eliminating the need for additional detection devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate imaging device is installed to determine axis misalignment, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The radar device performs self-diagnosis by using its own detection results to estimate axis-misalignment angles through multiple estimation methods, eliminating the need for separate imaging devices and achieving self-calibration functionality
Solution Approach 2:
The radar device is designed to perform multiple functions: both object detection and axis-misalignment estimation, allowing a single device to serve dual purposes and reducing overall system complexity while maintaining measurement precision
2Measurement precision
If multiple estimation methods are used to estimate axis-misalignment angle, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The estimation process is divided into multiple independent estimation methods (first estimation method using stationary objects, second estimation method using moving objects), allowing each method to contribute separately to the final accurate estimation while maintaining modular system architecture
Solution Approach 2:
The system employs employment determination units that evaluate the reliability of each estimation method's results and selectively employ estimates based on predefined conditions, creating a feedback mechanism that improves precision without requiring complex manual intervention
Data Source
AI summary
An axis-misalignment estimation device estimates an axis-misalignment angle of a radar device mounted to a moving object. The axis-misalignment estimation device estimates the axis-misalignment angle using a plurality of different axis-misalignment angle estimation methods based on detection results of the radar device. The axis-misalignment estimation device determines whether a predefined employment condition is met, based on a plurality of axis-misalignment angle estimates estimated using respective ones of the plurality of axis-misalignment angle estimation methods. In response to determining that the employment condition is met, the axis-misalignment estimation device employs at least one of the plurality of axis-misalignment angle estimates.