There have been new developments in the development direction and application field of photoelectric sensors, and on different occasions, photoelectric sensors will follow the differences in technology to develop the technology to a certain level. Then the technology of the photoelectric sensor can be understood as:
Photoelectric sensors are sensors that use photoelectric elements as detection elements. It first converts the measured changes into changes in optical signals, and then further converts the optical signals into electrical signals with the help of photoelectric elements. The photoelectric sensor produces a photoelectric effect after being irradiated by visible light and converts the light signal into an electrical signal for output. In addition to measuring light intensity, it can also measure a variety of physical quantities, such as size, displacement, speed, temperature, etc., by using light transmission, occlusion, reflection, interference, etc., so it is an important sensitive device photoelectric sensor with a wide range of applications It is generally composed of three parts: light source, optical path, and optoelectronic components. The photoelectric detection method has the advantages of high precision, fast response, non-contact, etc., and can measure many parameters. The structure of the sensor is simple and the form is flexible and diverse. Therefore, the photoelectric sensor is widely used in detection and control.
Exceptionally, the photoelectric effect of a photoelectric sensor is mainly a physical phenomenon in which light is irradiated on certain substances and the electrical properties of the substances are changed, which can be divided into two categories: external photoelectric effect and the
internal photoelectric effect. The external photoelectric effect refers to the physical phenomenon in which electrons in an object escape from the surface of the object and are emitted outward under the action of light. Photons are descriptions of electromagnetic waves in the visible light band in the form of quantized "particles". Photons have energy hv, where h is Planck's constant and v is the frequency of light. The photon flux corresponds to the light intensity.
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