LiDAR Beam Angle Compensation for Vehicle Shock Stability
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Solution Overview
Problem
The reliability of LiDAR-mounted vehicle systems is compromised when the beam angle is altered due to vehicle shocks, leading to degraded output information and subsequent safety and convenience function performance.
Innovation Solution
An apparatus and method that includes a storage unit for mounting height and initial beam angle, a beam receiving unit, a ground data detection unit, a beam angle calculation unit, a beam angle selection unit, and a beam angle compensation unit to calculate and adjust the beam angle based on returning beam data, ensuring accurate and high-density three-dimensional geo-spatial information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LiDAR is mounted in the vehicle to provide safety functions, then the vehicle can acquire distance and angle information, but the beam angle may change due to vehicle shocks causing degraded reliability
Solution Approach 1:
The system continuously monitors the actual beam angle by detecting ground data and calculating the angle based on mounting height and detected distance. When the beam angle deviates from the initial angle due to vehicle shocks, the system generates compensation values to correct the deviation, creating a closed-loop feedback mechanism that maintains reliable measurements despite physical disturbances
Solution Approach 2:
The system dynamically adjusts the beam angle parameter by calculating compensation values based on detected ground data and storing corrected angle values. This parameter change approach allows the system to adapt to physical changes in the LiDAR mounting position while maintaining accurate spatial information
2Measurement precision
If the beam angle changes due to vehicle shocks, then the LiDAR may be out of the first mounted angle, but the mounting position cannot be physically adjusted continuously
Solution Approach 1:
The system replaces complex mechanical angle adjustment mechanisms with a computational approach. Instead of physically adjusting the LiDAR mounting angle through mechanical means, the system uses software-based beam angle compensation that calculates correction values from detected ground data and applies them to maintain measurement precision
3Ease of manufacture
If the LiDAR is fixed at an initial beam angle, then the mounting is simple, but the output information reliability degrades when the beam angle changes
Solution Approach 1:
The system performs preliminary calibration by storing the initial beam angle at mounting time. This preliminary action establishes a reference value that the system uses for subsequent compensation calculations, allowing simple initial mounting while enabling later automatic correction of any angle deviations
Solution Approach 2:
The system implements continuous feedback by detecting ground data, calculating actual beam angle deviations from the stored initial angle, and generating compensation values to correct these deviations. This feedback mechanism maintains reliable output information without complicating the initial mounting process
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
Compensates for changed beam angles, providing reliable and accurate three-dimensional geo-spatial information to the driver, enhancing the performance of safety and convenience functions.
Implementation Method 1
a beam receiving unit configured to receive a beam returning after being emitted to a bottom layer
Data Source
AI summary
An apparatus for compensating for a beam angle of a multi-layer LiDAR includes: a beam angle calculation unit configured to calculate a distance d calculated by using ground data detected by a ground data detection unit and a beam angle of the multi-layer LiDAR by using a mounting height of the multi-layer LiDAR stored in a storage unit. When the beam angle calculated by a beam angle calculation unit is in a threshold range, a beam angle selection unit selects the calculated beam angle as the beam angle, when a beam angle compensation unit compensates for the initial beam angle by using the beam angle selected by the beam angle selection unit.