Vehicle Radar Mounting Angle Detection via Signal Power Ratio
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Solution Overview
Problem
Existing radar apparatus for vehicles face challenges in reliably measuring the mounting angle, particularly with respect to the traveling direction, which is crucial for proper alignment and performance, especially after potential contact or collision with external objects.
Innovation Solution
A method and apparatus that utilize signal processing to detect the mounting angle by transmitting and receiving test signals at different directivity angles, calculating power ratios, and referencing stored power ratio information to determine the mounting angle without requiring a special mechanical configuration, while also correcting for errors due to horizontal angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a special mechanical configuration is used to measure the mounting angle, then the measurement reliability is improved, but the device complexity and cost increase
Solution Approach 1:
The patent replaces mechanical measurement systems with an electromagnetic wave-based signal processing system. The radar apparatus uses transmitted and received signal power ratios at different directivity angles to calculate the mounting angle, eliminating the need for mechanical alignment tools or special mechanical configurations while achieving reliable measurement results
2Device complexity
If signal processing methods are used to detect mounting angle, then the device complexity is reduced, but the measurement precision may be compromised
Solution Approach 1:
The patent implements a feedback mechanism where the calculated mounting angle is used to correct the directivity angles of transmitted signals. The system transmits test signals at corrected angles based on the detected mounting angle, refines the power ratio measurements, and iteratively improves the mounting angle detection accuracy, ensuring high precision without complex mechanical systems
Solution Approach 2:
The patent changes the operating parameters of the radar system by adjusting the directivity angles of transmitted signals based on the detected mounting angle. By dynamically modifying transmission parameters and using power ratio calculations across multiple angles, the system achieves accurate mounting angle detection using only signal processing capabilities
3Ease of operation
If the radar apparatus is used without alignment correction, then the ease of operation is improved, but the performance reliability deteriorates due to misalignment from contact or collision
Solution Approach 1:
The radar apparatus performs self-alignment by automatically detecting its own mounting angle through signal processing and correcting its directivity angles accordingly. The system uses its own transmitted and received signals to calculate the mounting angle and adjusts its operation to compensate for misalignment, enabling autonomous alignment correction without external intervention or complex mechanical adjustment mechanisms
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
Enables accurate detection of the mounting angle without additional mechanical or electronic setups, improving reliability and reducing costs and complexity, and enhancing the radar's performance by ensuring proper alignment and reducing interference.
Implementation Method 1
receiving, by the radar apparatus mounted on a vehicle, a first test signal reflected by a test target after transmitting a signal at a first directivity angle
Implementation Method 2
The radar apparatus for a vehicle is a device for detecting the surroundings using a signal reflected by an object after transmitting a signal
Data Source
AI summary
The present disclosure relates to a method in which a radar apparatus for a vehicle detects a mounting angle and the radar apparatus for a vehicle, and more particularly, to a method for detecting a mounting angle of a radar apparatus for a vehicle using a power ratio of signals acquired by transmitting signals having different directivity angles and the radar apparatus for a vehicle.