A Calibration Device and Method to Calibrate the Beam’s Direction of the Point Laser Probe

Abstract:

When using the laser displacement sensor to measure distance, there is a deflection angle which exites between the direction of the laser beam and the direction of axis, this deflection angle has an impact on the final measurement result. This paper presented a calibration method of the laser beam’s direction, designed calibration device and ceramic calibration plate. In the process of calibrating, laser displacement sensor moves along Z-axis and Y-axis of machine, CCD camera takes the image of the spot projected by laser beam on the calibration plate, then calculate the laser beam’s direction based on the movement distance of laser displacement sensor and the spot’s position on calibration plate. Depend on the Mikron five-axis CNC machine tools, this paper describes the whole calibration process in details, the feasibility and accuracy of the method has been verified by experiment. Experimental results show that when the machine tool’s accuracy is within 0.002mm, the calibration error of laser beam’s direction can be controlled within the range of 0.05°.

• Periodical: Applied Mechanics and Materials (Volumes 799-800)
• Pages: 980-984
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.799-800.980
• Online since: October 2015
• Authors: Zhong Xing Xiong*, Feng Li, Bin Li
• Keywords: Calibration, CCD Camera, Direction of Laser Beam, Laser Measurement Technology

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