摘要：【中文】本发明属于测量设备技术领域，公开了一种非接触式测量圆柱度仪器及测量方法，通过1号步进电机旋转带动同步带进而带动激光位移传感器沿直线导轨移动；并同步记录激光位移传感器的激光位移数据，对记录的激光位移传感器的数据进行融合出第一测量点的截面轮廓点云；2号步进电机旋转带动同步带进而带动测量架移动到第二测量点、第三测量点；将三个截面的点云连线，判断三点是否在一条直线上，得到被测工件的圆柱度。本发明采用测量仪器运动的方式来进行测量，避免了对大型工件测量时的不易移动的问题；测量速度加快，只需在工件的三个截面进行测量；该装置结构简单，可适应不同尺寸的工件的测量。 【EN】The invention belongs to the technical field of measuring equipment and discloses a non-contact cylindricity measuring instrument and a measuring method, wherein a No. 1 stepping motor rotates to drive a synchronous belt so as to drive a laser displacement sensor to move along a linear guide rail; synchronously recording laser displacement data of the laser displacement sensor, and fusing the recorded data of the laser displacement sensor to obtain a cross-section outline point cloud of a first measuring point; the No. 2 stepping motor rotates to drive the synchronous belt to further drive the measuring frame to move to a second measuring point and a third measuring point; and connecting the point clouds of the three sections, and judging whether the three points are on the same straight line to obtain the cylindricity of the workpiece to be detected. The invention adopts the motion mode of the measuring instrument to measure, thereby avoiding the problem that the large-scale workpiece is not easy to move when being measured; the measuring speed is accelerated, and only three sections of the workpiece need to be measured; the device is simple in structure and can adapt to measurement of workpieces with different sizes.