一种感应型近接传感器(图6)可以利用金属物体对该传感器建立的场的影响来探测金属物体(黑色金属戎有色金属)的存在。由振荡器激励的传感线圈,在其前面产生一交变磁场。任何进入该场中的金属物体都会给振荡器加载,并使振荡器停止振荡。传感器中每一部分都不运动,因而不会磨损或不会起 An inductive proximity sensor (Figure 6) can detect the presence of metal objects (ferrous metals) by taking advantage of the effect of the metal object on the field created by the sensor. The sense coil excited by the oscillator generates an alternating magnetic field in front of it. Any metal object entering the field will load the oscillator and stop the oscillator from oscillating. Every part of the sensor does not move, so it will not wear or will not start