Device for detecting resisting force of lift cabin door in opening or closing process

Abstract

Disclosed is a resistance detection device used for the opening and closing process of the elevator door in the elevator detection technical field. In the invention, the left connecting device and the right connecting device of a double cantilever beam are arranged between a simultaneous tooth-shaped belt and a hanging plate; the left connecting device and the right connecting device of the double cantilever beam are respectively provided with strain force measurement devices; the strain force measurement devices measure the drive force applied on the connecting devices and send to a dynamic strain meter; the dynamic strain meter amplifies the signal and outputs the signal to a data acquisition card; a rotation encoder is mounted on the shaft of a permanent magnet synchronous motor in the elevator; the position information of the motor shaft is collected and transmitted to the data acquisition card; the computer processes the derivative operation towards the position information of the motor shaft in the data acquisition card to obtain the speed and acceleration values at any position during the opening and closing process; the resistance of the opening and closing of the elevator door is figured out according to the acceleration and drive force values. The resistance detection device in the implementation embodiment has the advantages of high sensitivity, easy calibration, being influenced by the environmental temperature and the humidity slightly and stable output signal.

Description

technical field [0001] The invention relates to a detection device in the technical field of elevators, in particular to a resistance detection device during the door opening and closing process of an elevator door. Background technique [0002] Elevator door system failure is one of the main causes of elevator accidents. Most of the traditional elevator door systems use crank-slider mechanism or crank-rocker mechanism as the drive system, while the drag system mainly uses a DC motor for step-down and speed regulation through series and parallel resistors, and also uses pulse width modulation technology for voltage regulation. speed regulation method. The reduction mechanism of the door opener mainly includes chain drive, belt drive and gear drive. The above-mentioned door opener system has complex structure, low efficiency, and poor speed regulation performance. Especially when running at low speed, since the speed regulation is realized by using series and parallel resis...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art above, the present invention proposes a resistance detection device in the process of opening and closing the elevator door, which adopts the force measuring principle of double cantilever beam structure, has high sensitivity, is easy to calibrate, is less affected by ambient temperature and humidity, and outputs a signal Stable and easy to use, it effectively solves the problem of changing resistance detection during the elevator door opening and closing process, obtains the resistance at any position and time during the elevator door opening and closing process, and provides a reliable basis for elevator door inspection, maintenance, and prevention of motor overload

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