Study on calibration and error compensation of laser scanning system

Jianjun Wang; Shiyi Song; Jie Lu; Bin Yao; Zhiqin Cai

doi:10.1117/12.2506737

18 January 2019 Study on calibration and error compensation of laser scanning system

Jianjun Wang, Shiyi Song, Jie Lu, Bin Yao, Zhiqin Cai

Proceedings Volume 10839, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment; 108391N (2019) https://doi.org/10.1117/12.2506737
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Based on the measurement principle of laser triangulation, error affecting factors considering the surface characteristics of measured object (including inclination angle, incident rotation angle, incident swing angle, etc.) is analyzed. The influence rules of error sources on the detection accuracy of the system are discussed, and a compensation algorithm for improving the detection accuracy is worked out. Taking the calibration of standard bar geometry center as an example, the measured values in machine reference frame are obtained through the coordinate conversion, and three calibration schemes are formulated: 1) When the measuring plane of the laser sensor is vertical and parallel to the axial direction of the standard rob respectively (that is, the installation rotation angles are 0° and 90° respectively), the laser sensor scans horizontally within the measurement range, the laser sensor measurement is used as the measurement value, and after obtaining the compensation from the above compensation algorithm, the standard rod center coordinates are obtained; 2) The position of the laser sensor is stable at the measurement center distance of the laser (that is, the displacement is 0), the displacement grating value of the coordinate measuring instrument is read as the measured value, and the standard bar center coordinates is obtained through the coordinate transformation theory; The accuracy of the above three measurement schemes is compared, the feasibility and accuracy of the theory are verified, which lays a foundation for the research and development of the measurement system.

Citation Download Citation

Jianjun Wang, Shiyi Song, Jie Lu, Bin Yao, and Zhiqin Cai "Study on calibration and error compensation of laser scanning system", Proc. SPIE 10839, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment, 108391N (18 January 2019); https://doi.org/10.1117/12.2506737

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