对于缸套内孔圆度和外部缺陷,有一系列众所周知的测量仪器和测量方法。但是,内径千分尺只能在断续的圆周位置上测量直径,并测不出气缸轴线。而这些内孔圆度和气缸形状的精密测量仪器又都是固定的台式仪器。此外还有各种类型的测量用探针,它可以根据仪器结构逐点地将圆柱表面或是圆周记录下来。但是,在发动机试验台上测量时,控制探针难度 For cylinder bore porosity and external defects, there are a number of well-known measuring instruments and measuring methods. However, an ID micrometer can only measure the diameter at intermittent circumferential positions and can not measure the cylinder axis. And these internal hole roundness and cylinder shape precision measuring instruments are all fixed desktop instrument. There are also various types of measuring probes that record the cylindrical surface or circumference point by point according to the structure of the instrument. However, when measuring on an engine test stand, the probe is difficult to control