对内燃机的基本要求是要保证连杆——活塞组的制造及装配质量均保持优良,而活塞环热涨间隙及径向间隙的检测又具有特殊的意义。批量生产中活塞环的检测是在能反复进行调整的检测仪上进行的。这里介绍一种光电法测量小尺寸间隙并能自动处理信息的测量仪器。图1为光电检测仪的原理方框图。环规内装入要测的活塞环后放到测量头内。通过活塞 The basic requirement of the internal combustion engine is to ensure that the quality of the assembly and assembly of the connecting rod and piston assembly remains excellent, and the detection of the piston ring thermal expansion gap and the radial clearance is of special significance. Piston ring in mass production testing is carried out repeatedly on the detector can be adjusted. Here is a photoelectron measuring small size gap and can automatically process information measuring instruments. Figure 1 is a photonic detector block diagram. Ring gauge into the measured piston ring into the measuring head. Pass the piston