The purpose of use is to protect the safety of the elevator's light curtain, which is a photoelectric sensor. This equipment is usually installed at the entrance of the elevator. Its main significance is to protect the safety of passengers. Many people do n’t understand, because many people have not seen the light curtain of the elevator. Let ’s take a look at what is the light curtain in the elevator?
Introduction of elevator light curtain
1. Elevator light curtain is a kind of light-weight elevator door safety protection device, which is suitable for passenger and freight elevators to protect the safety of passengers. It consists of infrared transmitters and receivers installed on both sides of the elevator car door, a power box installed on the car roof and special soft cables.
2. When any beam of light is blocked, the control system immediately outputs an open signal, the car door stops and opens in the reverse direction, and it can only be closed after the passenger leaves the guard elevator door, so as to achieve safety, so people can avoid Elevator clips happen in the world.
Working principle of elevator light curtain
1. In the practical application of elevator safety light curtain, no controller is needed, only the transmitter and receiver are needed. When in use, the controller is connected to the air plug socket or cable, and the output can be directly connected to the relay or various computer digital interfaces.
2. When there is no obstacle between the infrared transmitter and the infrared receiver on the same line, the modulated signal can reach the infrared receiver smoothly. When the infrared receiver receives the modulation signal, the corresponding internal circuit outputs a low level. However, in the case of obstacles, the modulated signal cannot smoothly reach the infrared receiver. At this time, the infrared receiver cannot receive the modulated signal.