Method for monitoring operation position of elevator based on air pressure change

Abstract

The invention discloses a method for monitoring an operation position of an elevator based on air pressure change. The method is characterized in that the atmospheric pressure at the bottom or the topend of an elevator shaft is used as the reference air pressure, an acceleration threshold value and a speed threshold value of an elevator car are set, the real-time air pressure of the elevator carin the up-down operation process is detected through an air pressure sensor, and an up-down operation height displacement is calculated through the difference between the real-time air pressure and the reference air pressure; and an acceleration sensor is used for detecting an acceleration of the elevator car in the up-down operation process and an acceleration change amount is calculated and a time change amount needed by the acceleration change amount is recorded, and then a real-time driving speed and a real-time acceleration of the elevator car are calculated, and then the acceleration iscompared with the acceleration threshold value and the driving speed is compared with the speed threshold value, and therefore the real-time floor height position and the real-time operation state ofthe elevator car are judged. According to the method, the position where the elevator breaks down can be judged quickly, so that timely and accurate rescue are guaranteed, and the possible operation states of the elevator can be effectively judged.

Description

technical field [0001] The invention belongs to the technical field of elevator real-time detection, in particular to a method for monitoring the running position of an elevator based on changes in air pressure. Background technique [0002] With the popularization and application of elevators in high-rise buildings and the improvement of people's living standards, people have higher and higher requirements for the stability and comfort of elevators. As elevators are used more and more frequently, their safe operation It is also more and more widely concerned by the society, not only related to the personal safety of the people but also affects the public transportation safety of a society. During the operation of the elevator, the elevator car is realized by speed control and position control of the motor that drives the sling that suspends the elevator car. At this time, the elevator car is measured according to the output of the encoder that rotates with the motor shaft. ...

AI Technical Summary

Problems solved by technology

During the operation of the elevator, the elevator car is realized by speed control and position control of the motor that drives the sling that suspends the elevator car. At this time, the elevator car is measured according to the output of the encoder that rotates with the motor shaft. In addition, the starting and braking process of the motor is accompanied by the process of acceleration or deceleration. Therefore, in order to describe the judgment of the elevator running position more accurately, the existing technology is to directly detect the acceleration of the elevator. , speed and displacement and other three parameters combined with the detection of the reference position to grasp the position of the elevator car, and the position of the elevator car obtained through the reference position and the relationship between acceleration, speed and displacement is the final stop of the elevator car The floor or the distance from the bottom (or top) of the elevator passage (well) on the floor is used as the basis for judgment, so it is difficult to obtain the trajectory or position of the elevator, and judgment errors often occur, and the judgment process is more complicated

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