激光瞄准大轴半径测量方法的研究与应用

提高大型轴类工件轴径在线测量精度，其主要困难在于用非接触法时如何精确地确定测量点的位置。采用特殊的机械装置，使激光光斑落在被测工件表面上，通过CCD摄像及图像分析，可获得优于0．01mm的定位瞄准精度。实验表明，对于300mm以下的轴径，这种方法的测量误差不超过0．015mm。

Study and application of a big axis measuring method with laser collimation

The main difficulty for improving the on-line diameter-measuring accuracy of large-sized axis depends on how the measurement position is accurately determined by non-contact methods. A laser spot can be fallen on the measured workpiece by means of a special mechanical unit. Locating and collimation accuracy better than 0.01mm can be obtained through CCD shooting and image analysis. The experiments show that the measuring accuracy of this method will not be more than 0.015mm for the axis diameter less than 3,000mm.