中圖分類號： TN919.5,；TB92 文獻標識碼： A DOI：10.16157/j.issn.0258-7998.200654 中文引用格式： 高彤，陳鴻,，張亮,，等. 接觸式輪廓掃描儀系統(tǒng)標定算法[J].電子技術應用，2021,，47(3)：65-70,，74. 英文引用格式： Gao Tong，Chen Hong,，Zhang Liang,，et al. Calibration algorithm of contact contour scanner system[J]. Application of Electronic Technique，2021,，47(3)：65-70,，74.
Calibration algorithm of contact contour scanner system
Gao Tong1，Chen Hong1,，Zhang Liang2,，Wang Jinqi3
1.State Key Laboratory of Electronic Test Technology，Key Lab of Instrument Science and Dynamic Measurement,， North University of China,，Taiyuan 030051，China,； 2.College of Transportation and Logistics,，Taiyuan University of Science and Technology，Taiyuan 030051，China,； 3.Shanghai Radio Equipment Research Institute,，Shanghai 201109，China
Abstract： The principle of the contact contour scanner is to use the length sequence returned by the encoder and the rotation angle of the rotating platform to determine the contour coordinates of the object to be measured. Since the starting point of the detection hook does not coincide with the center of the rotating platform,，it leads to the contour drawn directly from the measured data is not accurate. In order to solve this error, this paper proposes a method that does not need to establish the precise error model of the system, but to obtain system parameters by using the data obtained from the square calibration plate with known measurement size, and then calibrates the contour coordinates online. The measurement process was simulated through programming and the parameters obtained were compared with the ideal parameter values. The simulation data showed that the algorithm could control the measurement error below 0.5 mm and the angle error below 0.1°, which met the accuracy requirements of the equipment and could restore the real contour of the graph under test.
Key words : contact measurement；coordinate calibration,；least squares,；fitting；the calibration model
