LIDAR Motor Position Compensation for Speed-Dependent Scan Errors
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Solution Overview
Problem
The accuracy of a LIDAR motor's position is difficult to determine due to variations in motor speed, which affects the precision of target object detection.
Innovation Solution
An apparatus and method that include a motor rotating at a user-set speed, a controller generating parameters based on rotation speed to determine motor position within a preset horizontal angle of view, and an encoder outputting pulse waveforms to aid in position determination and error compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor rotates at a constant speed to simplify control, then the control system becomes simpler, but the position accuracy deteriorates due to speed variations and rotation errors
Solution Approach 1:
The patent employs a feedback mechanism where the actual rotation angle and time of the motor are continuously measured and compared with expected values. Based on this feedback, the system calculates position errors and compensates for them, thereby maintaining high position accuracy despite speed variations and simplifying the control approach.
Solution Approach 2:
The system dynamically adjusts parameters such as rotation time and angle based on actual motor performance. By changing these parameters in real-time according to measured values, the system compensates for speed variations and maintains accurate positioning without requiring complex constant-speed control.
2Productivity
If the motor speed is increased to improve scanning coverage, then the productivity increases, but the position accuracy deteriorates due to harder-to-maintain constant speed
Solution Approach 1:
At higher rotation speeds, the feedback mechanism becomes even more critical. The system continuously monitors actual rotation angle and time, compares them with expected values, and compensates for errors in real-time. This allows the motor to rotate faster for improved scanning coverage while maintaining position accuracy through active error compensation.
Solution Approach 2:
The system pre-calculates expected rotation angles and times based on target speed, then uses these preliminary values as reference for feedback comparison. This preliminary action enables the system to quickly identify and compensate for deviations, allowing higher operating speeds without sacrificing accuracy.
3Adaptability or versatility
If the rotation speed is varied to adapt to different scanning requirements, then the adaptability improves, but the position accuracy deteriorates due to speed-dependent errors
Solution Approach 1:
The system dynamically adjusts operation parameters based on actual motor performance at different speeds. By continuously measuring rotation angle and time and adapting compensation values to current speed conditions, the system maintains position accuracy across varying rotation speeds, enabling adaptability to different scanning requirements without sacrificing accuracy.
Solution Approach 2:
The system changes operational parameters such as rotation time and angle compensation based on actual motor speed. By adapting these parameters to current speed conditions, the system maintains position accuracy across different rotation speeds, enabling versatile scanning capabilities while compensating for speed-dependent errors.
Data Source
AI summary
An apparatus of improving position accuracy of a Light Detection and Ranging (LIDAR) motor may include a motor that rotates at a rotation speed set by a user and a controller that generates a parameter depending on the rotation speed for determining a position of the motor within a preset horizontal angle of view and determines whether the motor is in a normal operation state and the position of the motor, based on the parameter.