Under what conditions to choose photoelectric switch

Although many industries have used photoelectric switches, there are still many friends who don't know it very well. I don't know under what circumstances photoelectric sensors need to be used. Let's take a look at it together.

What is a photoelectric sensor

The photoelectric switch is a member of a large family of sensors, which converts the change in the intensity of light between the transmitting end and the receiving end into a change in current to achieve the purpose of detection. Since the output circuit and input circuit of the photoelectric switch are electrically isolated (ie, electrical insulation), it can be used in many occasions.

Photoelectric sensor A new generation of photoelectric switch devices manufactured using integrated circuit technology and SMT surface mounting technology has intelligent functions such as delay, expansion, external synchronization, anti-interference, high reliability, stable working area and self-diagnosis. This novel photoelectric switch is an active photoelectric detection system electronic switch that adopts pulse modulation. The cold light sources it uses include infrared light, red light, green light and blue light, etc., which can be non-contact and rapid without damage. And control the state and action of various solids, liquids, transparent bodies, black bodies, soft bodies and smoke.

Under what conditions do you choose a photoelectric switch

1. Long detection distance: some distances can reach 150 meters, which is impossible for limit switches and proximity switches.

2. There are few restrictions on the detection object. Because the detection principle is based on the shading and reflection caused by the detection object, unlike proximity switches, the detection object is limited to the category of metal or magnetic objects. It can be used for glass, plastic, wood, liquid, etc. Almost all objects are detected.

3. The speed is fast, the light itself is high-speed, and the circuit of the sensor is composed of electronic parts, so it does not include mechanical working time, and the response time is very short. The projected light beam can be concentrated on a small spot or formed by advanced design technology. Special light-receiving optical system to achieve high resolution. 4. Color mark detection: detection of small objects and high-precision position detection. The reflectance and absorptivity of the light formed by the detection object varies according to the wavelength of the projected light and the color combination of the detection object. The color of the detected object can be detected, and the color can be detected and identified.

The above is our brief introduction. At present, this new type of photoelectric switch has been used for level detection, liquid level control, product counting, width discrimination, speed detection, fixed-length cutting, hole recognition, signal delay, automatic door transmission Sensing, color mark detection, punching and shearing machine, safety protection and many other fields. In addition, the concealment of infrared rays can also be used as an anti-theft warning in banks, warehouses, shops, offices and other occasions where it is needed.