Research on Coaxiality Measurement System of Large-span Small-hole System Based on Laser Collimation
Research on Coaxiality Measurement System of Large-span Small-hole System Based on Laser Collimation
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DOI：
10.1016/j.measurement.2022.110765
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发表时间：
2022-01
期刊：
影响因子：
5.6
通讯作者：
C. Gao;Yong-hua Lu;Zhengwei Lu;Xinyu Liu;Jinhai Zhang
中科院分区：
文献类型：
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作者：
C. Gao;Yong-hua Lu;Zhengwei Lu;Xinyu Liu;Jinhai Zhang
针对大跨度小孔系统存在的空间跨度大、被测孔径小、孔深短、相邻孔间距大、测量空间有限、缺乏测量基准等问题，提出了一种以激光位移传感器为核心的基于激光准直的非接触式同轴度测量系统。根据数学模型，利用位置敏感探测器（PSD）和多自由度运动平台建立零件在任意位置的参考轴。设计了相应的截面圆拟合和同轴度评估算法，解决了测量问题。实验证明，该系统对轴向尺寸大（总长度大于1500mm）、孔径小（直径小于φ 10mm）、孔间距大（孔间距大于750mm）的零件具有较高的同轴度检测精度，测量误差不超过0.03 mm。
Aiming at the problems of large-span small-hole system, such as long spatial span, small measured aperture, short hole depth, large distance between adjacent holes, limited measurement space, and lack of measurement benchmark, a non-contact coaxiality measurement system based on laser collimation with the laser displacement sensor as the core is proposed. According to the mathematical model, a position sensitive detector (PSD) and a motion platform with multiple degrees of freedom are utilized to establish a reference axis for parts at any position. Also, the relevant cross-section circle fitting and coaxiality evaluation algorithms are designed to solve the measurement problem. It is proved that this system has high coaxiality detection accuracy for the parts with large axial dimensions (total length is more than 1500 mm), small aperture (diameter is less than φ 10 mm) and large hole spacing (space between two holes is more than 750 mm), and the measurement error does not exceed 0.03 mm.