Radar Sensor Target Angle Error Correction via V2X Fusion
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Solution Overview
Problem
Radar sensors in vehicles often experience target angle errors due to incorrect mounting, manufacturing errors, and bumper shape issues, limiting their ability to accurately sense objects and provide reliable collision warnings or cruise control functions.
Innovation Solution
A method that corrects target angle errors using V2X communication by recognizing target positions through both radar sensors and V2X communication, calculating and applying the error to the phase curve to improve accuracy and reliability, especially in various driving situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If target angle error correction is performed using only radar sensor data, then the correction process is simple, but the correction accuracy decreases and reliability is reduced
Solution Approach 1:
The patent combines radar sensor data with V2X communication data to perform target angle error correction. The radar sensor provides real-time angular information while V2X provides position and behavior data, and the fusion of these multiple data sources improves correction accuracy without excessively increasing system complexity.
Solution Approach 2:
The patent introduces V2X communication as an intermediary data source to verify and correct radar sensor measurements. By using independent position data from V2X as a reference, the system can identify and correct radar angle errors more reliably.
2Ease of manufacture
If radar sensor mounting errors and manufacturing errors are accepted, then the system is simpler to manufacture, but target angle measurement accuracy deteriorates
Solution Approach 1:
The system performs self-correction by using the phase curve and target angle error calculations to automatically compensate for mounting and manufacturing errors. The radar sensor system adjusts its own measurements using the derived correction values without requiring manual recalibration or reinstallation.
Solution Approach 2:
The patent changes the phase curve parameters based on calculated target angle errors to compensate for mounting and manufacturing inaccuracies. By adjusting the phase curve parameters, the system maintains measurement accuracy despite physical installation variations.
3Reliability
If the correctable limit conditions are maintained, then the correction method is more reliable, but the applicability to various driving situations is reduced
Solution Approach 1:
The patent dynamically adjusts the phase curve based on real-time target angle error calculations from V2X communication. This dynamic adaptation allows the correction method to remain reliable while becoming applicable to various driving situations, as the phase curve is continuously updated to reflect current conditions.
Solution Approach 2:
The system performs preliminary error correction by calculating target angle errors using V2X data before final target detection and warning. This preliminary correction action ensures reliable results across different driving situations by pre-adjusting for known errors.
Data Source
AI summary
A method of correcting a target angle error of a radar sensor, the method may include recognizing a first target angle of a target through the radar sensor; recognizing a second target angle of the target through V2X communication and then calculating a target angle error between the first target angle and the second target angle; comparing the target angle error with a predetermined critical error; and correcting a phase curve of the radar sensor by applying the target angle error to the phase curve in accordance with the comparison result, and then giving a target warning using the corrected phase curve.