我所在研制产品中有如图1所示的微波元件(图形已作了简化)。其中凹圆弧的圆度误差对产品性能有直接影响。为了测量该凹圆弧的圆度误差,我们在万工显上测出圆弧上均布各点的直角坐标值 x、y。定位采用“电眼法”,电眼可利用万能测长仪的附件并进行适当改装。数据处理用最小二乘法在微型计算机上进行。 I developed the product shown in Figure 1, the microwave components (graphics have been simplified). Circularity error of concave circular arc has a direct impact on product performance. In order to measure the circularity error of this concave circular arc, we measured the Cartesian coordinate values ​​x, y of the points on the arc. Positioning using “electric eye”, electric eye can use universal length measuring instrument accessories and appropriate modification. Data processing was performed on a microcomputer using the least square method.