What Is a Light Curtain?
The light curtain is a safety protection device made using the principle of photoelectric induction. In addition, the light curtain also refers to Qianbeiwuwen, also known as plain back, light back, and plain curtain.
Light curtain
- The light curtain is divided into a safety light curtain with a safety level and an ordinary light curtain without a safety level.
- Light curtain (10 photos)
- Safety light curtains are mainly used in industrial automation.
- In modern factories, humans and machines work in tandem on potentially dangerous machinery, such as stamping machinery, shearing equipment, metal cutting equipment, automated assembly lines, automated welding lines, mechanical transfer handling equipment, hazardous areas (toxic, High pressure, high temperature, etc.), it is easy to cause injury to operators.
- The optoelectronic safety device emits infrared rays to generate a protective light curtain. When the light curtain is blocked, the device sends a light-shielding signal to control the potentially dangerous mechanical equipment to stop working to avoid safety accidents.
- The installation of photoelectric safety protection devices can effectively avoid the occurrence of safety accidents, avoid the danger of workers and third parties, reduce the overall cost of the accident, and benefit the company itself, the workers and society.
- Safety light curtain is generally divided into safety level 2 and safety level 4.
- Ordinary light curtains with no safety level are generally used in elevators or security fields to prevent intrusion detection.
- When used in the security field to prevent intrusion detection, 3C certification is required.
- The most common application for ordinary light curtains without safety levels is elevator light curtains.
- Design methods to improve light curtain reliability:
- In actual working conditions, the damage or instability of the light curtain is often caused by unstable voltage, poor grounding, interference from ambient light, dust, and water ingress.
- Therefore, in order to improve the trouble-free working time of light curtain products, it is recommended to consider the following factors when designing the light curtain:
- -IP65 protection
- -Ambient light resistance above 100,000 Lux
- -Fluorescent light resistance above 3000Lux
- -Metal case, ground-free design
- -Pass static discharge test of at least 4000V
- -Withstands instantaneous surges of 1000V
- -Capable of withstanding group pulses above 4000V