Universal elevator light curtain

Universal elevator light curtain is a type of light type elevator door safety protection device widely used in passenger and freight elevators, with its core function being to protect the safety of passengers. The following is a detailed introduction to the universal elevator light curtain:

1、 Composition structure

The universal elevator light curtain mainly consists of the following parts:

Infrared transmitter and receiver: These components are carefully installed on both sides of the elevator car door, responsible for emitting and receiving infrared beams.

Power box: usually installed on the roof of the car, providing power for the light curtain system.

Specialized flexible cable: used to connect infrared transmitters, receivers, and power boxes to ensure stable signal transmission.

2、 Working principle

The working principle of a universal elevator light curtain is based on the emission and reception of infrared radiation. When the elevator door is about to close, the light curtain system will emit beams of infrared radiation, forming a dense and staggered "protective net" on both sides of the elevator door. When there are no obstacles entering the space, all emitted beams can reach the receiving pipe normally, and the elevator control system will not receive a signal of "intrusion", allowing the elevator door to close normally. However, once an object blocks any of the light rays, the corresponding infrared receiver will produce an "abnormal" output, which will be detected by the circuit and quickly respond by instructing the elevator to reopen the car door. The elevator doors will only close normally again when passengers or obstacles have completely left the alert area.

3、 Characteristics and advantages

Highly sensitive: Universal elevator light curtains typically contain more than 30 pairs of infrared emitting and receiving tubes, which can detect the presence of obstacles in a very short time.

Safe and reliable: By forming a dense infrared "protection network", it effectively prevents the possibility of elevator door jamming or other safety accidents.

Wide applicability: Suitable for various types of passenger and cargo elevators, providing passengers with comprehensive safety protection.

Convenient maintenance: The structural design of the light curtain system is reasonable, easy to inspect and maintain, and reduces long-term operating costs.

4、 Precautions and maintenance suggestions

Regular inspection: The elevator light curtain should be inspected regularly to ensure that it is in good working condition. The inspection includes the cleanliness of the infrared transmitter and receiver, the voltage stability of the power box, and the integrity of the dedicated flexible cable.

Timely cleaning: Elevator light curtains that have been used for a long time or in harsh environments may accumulate dust on their infrared emitting/receiving light tubes. Therefore, the light curtain system should be regularly cleaned to ensure the normal emission and reception of infrared radiation.

Replace damaged parts: Once the infrared emitting light tube or receiver is found to be damaged, it should be replaced in a timely manner to ensure the normal closing and safe operation of the elevator door.

In summary, the universal elevator light curtain, as an important safety protection device for elevator doors, plays a crucial role in ensuring passenger safety. By understanding its composition structure, working principle, characteristics and advantages, as well as precautions and maintenance suggestions, we can better use and maintain this safety device to ensure the safe operation of the elevator.