Under normal circumstances, the photoelectric switch sensor is composed of two parts: a processing path and a processing element. Its basic principle is to use the photoelectric effect to convert the measured changes into optical signal changes, and then use photoelectric elements to further convert non-electrical signals into electrical signals. The photoelectric switch sensor manufacturer tells you that the “photoelectric effect” refers to illuminating an object with light, which can be regarded as a certain energy sequence of photons bombarding the object. At this time, the energy of the photon is transferred to the electron, and all the energy of the electron is An electron is absorbed at a time, and when the electron gains the energy transferred by the photon, its state will change, so the object irradiated by the light will have a corresponding electrical effect. Generally, the photoelectric effect is divided into three categories:

1. The phenomenon that electrons can escape from the surface of an object under the action of light is called external photoelectric effect, such as photoelectric tube, photomultiplier tube, etc.;
2. The phenomenon that can change the resistivity of an object under the action of light is called the internal photoelectric effect, such as photoresistors, phototransistors, etc.;
3. Under the action of light, the phenomenon that an object generates an electromotive force in a certain direction is called photovoltaic response, such as a photovoltaic cell.
The photoelectric switch sensor is a device that converts optical signals (visible and ultraviolet laser light) into electronic signals, and is a key element for photoelectric conversion in various photoelectric detection systems.
The photoelectric switch sensor is a sensor that uses optoelectronic devices as conversion elements. The system can detect the non-electrical physical quantities that directly lead to changes in the amount of light, such as light intensity, illuminance, radiation temperature, gas composition analysis, etc.; it can also detect other non-electrical factors, such as part diameter, surface roughness, strain, displacement, Vibration, speed, acceleration, object shape, working condition recognition, etc., are transformed into light quantity changes. The photoelectric switch sensor manufacturer tells you that the photoelectric sensor has the characteristics of non-contact, fast response, and reliable performance, so it is widely used in industrial automation equipment and robots. The emergence of new optoelectronic devices, especially the birth of CCD image sensors, has opened up new horizons for the further application of optoelectronic sensors.
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