Cylinder straightness in-situ self-calibration measurement method based on laser Doppler velocimeter

The invention discloses a cylinder straightness in-situ self-calibration measurement method based on a laser Doppler velocimeter, which adopts the laser Doppler velocimeter to determine a measurement area, and enables a workpiece on a machine tool to be measured on line in the measurement area. Compared with a traditional measuring method, the method has the advantages that the radius of each section of the workpiece is measured firstly, so that the straightness and the taper of the cylindrical part are determined, and the method is not affected by error motion of the guide rail, has a self-calibration function, is high in measuring accuracy and can give the absolute radius of the workpiece. 本发明公开了一种基于激光多普勒测速仪的圆柱直线度在位自校准测量方法，此方法采用激光多普勒测速仪确定测量区域，并令位于机床上的工件在此测量区域内进行在线测量。与传统的测量方法相比，本发明的方法首先测出工件各截面的半径，从而，确定出圆柱零件的直线度与锥度，而且，该方法不受导轨误差运动的影响，具有自校准功能，测量准确性高，而且能给出工件的绝对半径。