Vehicle Radar Angle Correction for Fascia-Induced DOA Errors
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Solution Overview
Problem
Existing radar systems struggle to accurately determine the direction-of-arrival of radar waves due to interference from vehicle components like a fascia, leading to increased angle errors and jumps, which are not adequately addressed by current integration guidelines.
Innovation Solution
A method that estimates and corrects for the impact of vehicle components on radar waves by simulating their influence using geometric and material properties, generating a reference beam vector, and correlating it with measured data to modify primary data for precise angle determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the radar sensor is mounted behind vehicle components like a fascia, then the radar sensor can be integrated into the vehicle structure, but the vehicle components reflect radar waves and cause increased angle errors and angle jumps in direction-of-arrival determination
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction values for the impact of vehicle components on radar waves before actual operation. During operation, these pre-computed correction values are applied to correct the direction-of-arrival determination, avoiding the need for real-time complex calculations and enabling quick compensation for the fascia's reflective effects
Solution Approach 2:
The patent implements feedback by using the determined direction-of-arrival information to identify reflected radar waves from vehicle components, then using this information to correct subsequent measurements. The system continuously monitors and adjusts for the fascia's impact based on observed angle errors and reflections
2Reliability
If guidelines are provided for integration of vehicle components to mitigate impact on radar sensor performance, then gain loss and angle error may be reduced, but direct inclusion of component impact into the angle finding process is still missing
Solution Approach 1:
The patent applies parameter changes by modifying the angle finding process to include correction values that account for the fascia's impact. Instead of changing the physical integration guidelines, the system changes the computational parameters by applying pre-calculated correction factors to the direction-of-arrival determination, thereby compensating for the fascia's reflective effects without altering the integration design
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces angle errors and avoids jumps, providing more accurate direction-of-arrival calculations with reduced computational effort, allowing closer installation of radar sensors to vehicle components.
Implementation Method 1
radar waves which are transmitted by a radar sensor mounted at a vehicle and which are reflected at an object in the external environment of the vehicle and received by the radar sensor
Data Source
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AI summary
A method is provided for determining a direction-of-arrival for radar waves which are transmitted by a radar sensor mounted at a vehicle. The radar waves are reflected at an object in the external environment of the vehicle and received by the radar sensor, and a vehicle component is mounted in a field of view of the radar sensor. According to the method, an impact of the vehicle component on the radar waves received by the radar sensor is estimated, and the result of the estimating step is stored in a memory being available during operation of the vehicle. During operation of the vehicle, primary data is received which is generated by radar waves being received by the radar sensor. The primary data is modified by the stored result of the estimating step, and the direction-of-arrival is determined by using the modified data.