With the rapid urbanization of China’s social economy, high-rise buildings can be seen everywhere Elevator has also become the main tool in the field of vertical transportation, and its application is becoming more and more extensive, which provides great convenience for people’s lives But the safety of the elevator is also a hot topic. In recent years, the elevator door crane operation failure will occur from time to time in various places, which leads to accidents caused by the impermanent opening and closing of the elevator door. Therefore, it is very important to study the door crane In view of this phenomenon, sensors for safety monitoring can be installed to monitor and judge whether the elevator is in a dangerous state through the data transmitted by the sensors, and repair the elevator in time before the danger occurs With the development of modern technology, the research direction of elevator door crane turns to the health monitoring of door crane, from the maintenance after failure to the prediction and timely maintenance before failure The maintenance cost, time and energy are greatly increased, the service life of elevators is prolonged, accidents are avoided, and the safety and reliability of equipment operation are improved.