Photoelectric sensor has a very important application in the field of electronic component detection. In signal conversion, photoelectric signal conversion is very difficult. Firstly, there is energy loss, and secondly, the intervention of some internal and external environment will interfere and affect the efficiency and quality of photoelectric signal conversion. After the advent of high-quality photoelectric sensor, it has been supported by many industries.
1. Trough type
The photoelectric sensor ensures quality and quantity. The light transmitter and receiver are installed on both sides of the groove. The light transmitter can emit infrared or visible light, and the light receiver can receive light without obstacles. However, when the detected object passes through the slot, the time will be blocked, and the photoelectric switch will move and output a reliable switch control signal. After cutting off or opening the load current, a control action will be completed. Due to the limitation of the whole structure, the detection distance of the switch is short.
2. Reverse light type
If the light transmitter and receiver are separated, the detection distance can be increased. The photoelectric switch composed of photoelectric sensor and receiver is called anti radiation isolation photoelectric switch, which is referred to as anti radiation photoelectric switch for short. Its detection range can reach several meters or even tens of meters. When the optical transmitter and optical receiver are installed on both sides of the path through which the detector passes, when the detector is blocked through the optical path, the receiver starts to output the switch control signal.
The photoelectric sensor has powerful functions, that is, the light transmitter and receiver are installed in the same device. The front of the light transmitter and receiver is equipped with a reflecting plate. The photoelectric switch of the reflecting plate (or mirror) uses the reflection principle to complete the photoelectric control function. Generally, the light emitted by the photoelectric sensor is reflected by the reflector and then received by the receiver. When the optical path is blocked by the detected object and the receiver cannot receive the light, the photoelectric switch performs action and outputs the switch control signal.