Photoelectric sensor works

Signal plate mounted on the light emitting diode (LED) and phototransistor (or photodiode) between. When the signal light on the disc is rotated to bore between the LED and phototransistor, LED will emit light irradiated onto the photosensitive transistor, when the photosensitive transistor, the collector output low (0.1 ~ O.3V ); when the signal on the disc is rotated to the light-shielding portion between the LED and phototransistor, LED emitted light can not be irradiated onto the photosensitive transistor, phototransistor time off, its collector output high (4.8 ~ 5.2V) . If the signal plate continuous rotation, light holes and partial shading LED will alternately turn the light or shade, phototransistor collector output will alternately high and low. When Camshaft Position Sensor shaft equipped with the crankshaft and camshaft rotates, the signal light on the disc begins with holes and partial shading between the LED and phototransistor turned, LED panel light emitted by the light and shade effect signal will alternate irradiation phototransistor to the signal generator, the signal will be generated in Car Sensors and the camshaft position corresponding to the position pulse signal. As the crankshaft rotates two turn signal transducer shaft disc revolution, therefore, G signal sensor will produce six pulse signal. Ne signal sensor 360 will produce a pulse signal. Since the G signal interval radians aperture 60. , 120 each time the crankshaft rotates. A pulse signal is generated, it is usually referred to as the G signal 120.