基于2D激光技术的轴径在线精密测量方法

Method of on-line precision measurement of shaft diameter based on 2D laser technology

针对轴径测量方法在精度、可靠性和适应性等方面存在的问题,提出一种基于2D激光测量和全量程标定校准的轴径精密在线测量方法。采用2D激光轮廓传感器同步采集检验剖面的二维坐标数据,基于采集的坐标数据和最小二乘拟合算法求解被测轴的半径,基于最小区域原则优选检验剖面,采用全量程标定校准方法建立轴径测量误差模型,利用误差补偿算法实时补偿系统的非线性误差,提高轴径测量的精度。研究结果表明,该方法测量相对误差小于1%,实现了免拆卸情况下的轴径非接触、在线、高精度测量。

Aiming at the problems of shaft diameter measurement method in accuracy,reliability and adaptability,a precision and on-line measurement method of shaft diameter based on 2D laser measurement and full range calibration is proposed.In this method,2D coordinate data of the inspection section is collected synchronously using the 2D laser profile sensor,and the radius of the measured shaft is solved based on the collected coordinate data and the least squares fitting algorithm.The test profile is optimized and determined based on the principle of minimum area.The full range calibration method is used to establish the error model of shaft diameter measurement,and the error compensation algorithm is used to compensate the nonlinear error of the system in real time to improve the measurement accuracy of shaft diameter.The research results show that the relative error of the method is less than 1%,and the non-contact,on-line and high-precision measurement of shaft diameter is achieved without disassembly.