A position calibration system and calibration method of a dual-galvanometer scanning system

Abstract

The invention discloses a position calibration system and calibration method of a dual-vibration mirror scanning system. The calibration method comprises following steps of rotating a horizontal vibration mirror of the dual-vibration mirror scanning system by use of stepping angles and measuring distance data fed back by a range finding device when the horizontal vibration mirror is at each stepping angle; when the horizontal vibration mirror is rotated to allow laser spots given out by the range finding device to irradiate a first position of a first plate edge of a calibration device, adjusting to rotate the horizontal vibration mirror at a first preset angle in the first position so as to adjust the horizontal vibration mirror to be in a horizontal zero point position; rotating a vertical vibration mirror of the dual-vibration mirror scanning system by use of stepping angles and measuring distance data fed back by the range finding device when the vertical vibration mirror is at each stepping angle; and when the vertical vibration mirror is rotated to allow laser spots given out by the range finding device to irradiate a second position of a second plate edge of the calibration device, adjusting to rotate the vertical vibration mirror at a second preset angle in the second position so as to adjust the vertical vibration mirror to be in a vertical zero point position. According to the invention, the calibration is simple and rapid and the calibration precision is high.

Description

technical field [0001] The invention relates to a dual vibrating mirror calibration system and a calibration method, in particular to a dual vibrating mirror position calibration system and a calibration method. Background technique [0002] The dual-galvanometer scanning system is a common scanning system, which has a simple structure, high precision, and is easy to operate and control. It is widely used in the scanning of some large and medium-sized scenes. In the scanning system, the position of the selected zero point is one of the keys to the accuracy and precision of the entire scanning data calculation. If the zero point is not correct, it will directly lead to errors and deviations in the measurement data. The calibration of the system zero point is usually very complicated, and can even be completed with the help of a variety of other tools and instruments, so the general scanning system is designed with a zero point calibration function after the zero point is cali...

AI Technical Summary

Problems solved by technology

[0005] 2. Install a position sensor such as an encoder, mark the position on the sensor after recording the zero position, and then use the position marked on the sensor for each calibration. The accuracy of this method depends on the accuracy of the sensor, the installation is complicated, and the accuracy High sensor costs are high, generally used in occasions with high precision requirements

[0006] 3. Set a benchmark outside the system, calculate the theoretical position of the benchmark, scan the benchmark, and analyze whether the position obtained by scanning the data is consistent with the theoretical position (within the tolerance range) to determine whether it is at the zero point. This method The installation is complicated, and it is only suitable for medium and large fixed scanning occasions, and it is easily disturbed by external conditions

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