Infrared photoelectric switches can be used in various applications. When using infrared photoelectric switches, attention should be paid to environmental conditions so that the infrared photoelectric switches can work normally and reliably. Infrared photoelectric switches generally work stably when the ambient illuminance is high. However, it should be avoided that the optical axis of the sensor faces strong light sources such as sunlight and incandescent lamps. Commonly used infrared photoelectric switch classification method: According to the detection method, it can be divided into three types: reflection type, opposite beam type and specular reflection type. The through-beam detection distance is long and can detect the density (transmittance) of translucent objects. The reflective working distance is limited near the intersection of the beams to avoid background effects. The mirror reflection type has a longer reflection distance, suitable for long-distance detection, and can also detect transparent or semi-transparent objects.
classification
Classified by structure
Infrared photoelectric switches can be divided into three types according to the structure: separated amplifier, built-in amplifier and built-in power supply.
The amplifier separation type is to separate the amplifier and the sensor, and use the special integrated circuit and the mixed installation craft to make, because the sensor has the characteristics of ultra-small and multi-variety, and the amplifier has more functions. Therefore, this type adopts the terminal block connection method and can be used for both AC and DC power supplies. It has the function of on and off delay, can set the light and sound switch, can control 6 kinds of output states, and has two output modes of contact and level.
The built-in amplifier is an integrated amplifier and sensor, made with ASIC and surface mounting technology, and works with a DC power supply. Its response speed situation (there are two kinds of 0.1ms and 1ms), can detect small and high-speed moving objects. Changing the polarity of the power supply can switch between bright and dark movement, and can set a self-diagnostic stable work area indicator. Both voltage and current output modes can prevent mutual interference, which is very convenient in system installation.
The built-in power supply unit integrates the amplifier, sensor and power supply device, and is made with a dedicated integrated circuit and surface mount technology. It generally uses AC power, which is suitable for replacing contact type limit switches at the production site and can be directly used for strong current control circuits. You can also set self-diagnostic stable working area indicator lights by yourself. The output is equipped with SSR solid state relay or relay normally open and normally closed contacts, which can prevent mutual interference and can be installed tightly in the system.
Features
1. The unique self-diagnostic and stable working area indication function can inform in time whether the working status is reliable.
2. Opposite, reflective, and mirror-reflective photoelectric switches all have the effect of preventing mutual interference and are easy to install.
3. The response speed is fast, the response speed of the high-speed photoelectric switch can reach 0.1ms, 300,000 detection operations can be performed per minute, and the small objects moving at high speed can be detected.
4. Adopting special integrated circuit and advanced SMT surface mounting technology, the reliability is very high.
5. Small size, light weight, simple installation and debugging, and short-circuit protection.
If you are interested in our products, please visit www.hkram.com to have more information.