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简体中文Passenger elevator door sensors are typically infrared sensors or light curtains which are located close to the elevator doors. Here is a general evaluation of how they paintings:
1. Infrared Sensors: Infrared sensors include a transmitter and a receiver. The transmitter emits an infrared beam in the direction of the receiver. When the elevator doors remain, the beam is uninterrupted, and the sensor recognizes that it is clear to close. However, if an object or person enters the course of the remaining doorways, it interrupts the beam, and the sensor sends a sign to the elevator management device to halt the door last manner and reopen the doorways.
2. Light Curtains: Light curtains use a sequence of infrared beams that make them bigger vertically across the door starting. These beams are created through an emitter on one side of the door and a receiver on the other side. If any of the beams are obstructed by an item or character, the mild curtain detects the interruption and alerts the elevator management machine to prevent the doorways from remaining or reopen them if they have already commenced.
In each case, the door sensors offer actual-time feedback to the elevator manipulate device, making sure that the doorways are no longer near if there's an obstruction. This allows for to prevent of accidents or injuries that can occur if a person or something gets caught among the ultimate doorways.
