Radar Axial Displacement Estimation Without Imaging Sensor
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Solution Overview
Problem
Existing object recognition apparatuses require an additional imaging apparatus to determine the axial displacement of a radar apparatus, complicating the configuration.
Innovation Solution
An axial displacement estimation device that includes an estimation unit, a utilization determination unit, and a utilization unit, capable of estimating the axial displacement angle of a radar apparatus mounted on a mobile body using detection values from radar waves modulated by different methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an imaging apparatus is added to determine axial displacement of a radar apparatus, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the axial displacement measurement function into the radar apparatus itself by utilizing radar waves with different modulation methods. The radar apparatus simultaneously performs object detection and axial displacement estimation, eliminating the need for separate imaging apparatus and achieving both measurement precision and configuration simplification
Solution Approach 2:
The radar apparatus is designed to perform multiple functions: object detection using radar waves and axial displacement estimation using the same radar waves with different modulation methods. This multi-functionality allows a single device to achieve both measurement precision and reduced complexity
2Measurement precision
If radar waves with different modulation methods are used for estimation, then measurement precision is improved, but use of energy increases
Solution Approach 1:
The radar apparatus transmits radar waves with different modulation methods in alternating periods or sequences. By periodically switching between different modulation methods, the system achieves precise axial displacement estimation through comparison while controlling energy consumption through time-multiplexed operation
Solution Approach 2:
The system uses multiple modulation methods but processes them selectively based on measurement requirements. Not all modulation methods are applied simultaneously or continuously, but rather partially or conditionally, achieving measurement precision while avoiding excessive energy consumption
Data Source
AI summary
An axial displacement estimation device estimates an axial displacement angle of a radar apparatus mounted on a mobile body. The axial displacement estimation device uses a plurality of detection values acquired by mutually different plurality of modulation methods to estimate an axial displacement angle for each of the plurality of modulation methods. The axial displacement estimation device determines whether a predetermined allowable condition is met based on a plurality of axial displacement angle estimation results estimated using a plurality of detection values corresponding to respective plurality of modulation methods. The axial displacement estimation device utilizes at least one of a plurality of axial displacement angle estimation results when determined that the predetermined allowable condition is met.