Pyroelectric Infrared Sensors in elevator systems

An elevator is a motor-driven vertical elevator with a box-shaped pod for carrying passengers or goods in multi-story buildings. As elevator accidents continue to occur, people are demanding more and more in terms of elevator safety. In order to prevent similar accidents from happening again, elevator designers have installed various sensors and measuring instruments on the body of the elevator, and the tilt sensor is one of them.

Tilt sensors are usually installed on the top of the elevator to detect the verticality of the elevator in real time. When the elevator exceeds the slope, the relevant personnel will understand the situation in real time and deal with it in time. Tilt sensor real-time output angle signal can also be displayed through the relevant instrumentation, and can be networked to form a monitoring network, so as to better maintain the use of the elevator, to protect the safety of people in and out. Currently more popular elevator anti-pinch sensor is generally infrared radiation photosensitive sensors.

A device applied to the door machine, used to protect people or objects from being clamped. An infrared photosensitive resistor emits a beam of light that illuminates a transmitter or receiver mounted on the other side of the elevator door. The transmitter is mounted on one side of the elevator door and the receiver on the other side. When the middle beam is blocked and the receiver beam does not receive the transmitter beam, it reacts to the controller and then to the elevator main board and the elevator door opens naturally.

In addition, there is an encoder in the elevator that converts the signal of speed into an electrical signal. It has two main functions: one is to detect the real-time position of the elevator in the shaft, and the other is to detect the real-time speed of the elevator operation. Finally, there are many other applications of sensors in elevators, such as accelerometers, pressure sensors, displacement sensors, load cells, and so on.