Vehicle Radar Angle Correction Using Lidar Line Alignment
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Solution Overview
Problem
Radar devices in vehicles can deviate from their initial mounting position due to shocks during driving, leading to unreliable detection information and compromised safety functions.
Innovation Solution
A radar control device that utilizes lidar and radar detection data to determine correction angles by comparing first and second straight lines, allowing for real-time adjustment of the radar's mounting angle to enhance detection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radar is mounted on the vehicle to perform detection functions, then the vehicle can provide safety functions and convenience functions, but the radar is subjected to shocks during driving and may deviate from the initial mounting position
Solution Approach 1:
The system continuously monitors the radar mounting angle using lidar and radar detection data, compares the actual position with the reference position, and generates correction signals when deviations are detected. This closed-loop feedback mechanism compensates for mounting position deviations caused by vehicle shocks, maintaining reliable detection information throughout the vehicle's operational life.
2Adaptability or versatility
If the radar mounting position is fixed to ensure stable detection, then the installation is simple, but the radar cannot adapt to position changes caused by shocks
Solution Approach 1:
The system introduces lidar as an intermediary device to measure the radar's mounting angle indirectly. By using laser ranging technology to detect the position of reflective markers on the radar, the system can determine angular deviations without directly measuring the radar itself, enabling adaptive correction while maintaining relatively simple system architecture.
3Measurement precision
If the radar mounting angle is corrected in real-time to maintain detection accuracy, then the reliability of detection information is improved, but the system complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The control device performs multiple functions: it processes lidar detection data, analyzes radar detection information, calculates mounting angle deviations, generates correction signals, and controls the radar angle adjustment. By consolidating these diverse functions into a single control unit, the system achieves high measurement precision without proportionally increasing overall system complexity.
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
Improves the reliability of radar detection information and ensures safer driving by correcting the radar's mounting angle in real-time, aligning it with the lidar's detection results.
Implementation Method 1
receive first forward driving information which is a detection result of a front of a host vehicle from a lidar
Implementation Method 2
receive second forward driving information which is a detection result of a front of a host vehicle from a radar
Data Source
AI summary
A radar control device includes a receiver configured to receive first forward driving information which is a detection result of a front of a host vehicle from a lidar and second forward driving information which is a detection result of the front of the host vehicle from a radar; a straight line determiner configured to, when an object around the host vehicle is continuously detected in a predetermined direction based on the first and second forward driving information, determine a first straight line based on the first forward driving information, and determine a second straight line based on the second forward driving information; and a controller configured to determine a correction angle of the radar based on an intersection angle between the first straight line and the second straight line, and generate a control signal for an angle correction of the radar according to the correction angle.