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Elevator fault diagnosis device

A fault diagnosis device and elevator technology, applied in the field of elevator control, can solve problems such as easy misjudgment in the judgment method and increase in elevator cost.

Active Publication Date: 2020-10-20
SHANGHAI MITSUBISHI ELEVATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems in this patent are: it is necessary to install a three-axis acceleration sensor on the car, which increases the cost of the elevator; the amplitude of a certain frequency band in the vibration spectrum of the car is greater than or equal to the normal amplitude of 1.5 to 3 in the frequency band times, it is easy to misjudgment that the elevator has or is about to fail, because even if the amplitude corresponding to some frequency bands in the frequency spectrum exceeds 1.5 to 3 times the normal value, it is still a very small value, and the elevator is still running normally.

Method used

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  • Elevator fault diagnosis device
  • Elevator fault diagnosis device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the elevator fault diagnosis device includes the main controller and sensors;

[0025] The sensor is used to detect the position and / or speed of the car;

[0026] The main controller performs frequency spectrum analysis on the detected position and / or running speed of the elevator car to obtain the frequency spectrum data when the car is running; the frequency spectrum data can reflect each vibration frequency component and its amplitude when the car is running. value distribution, such as figure 2 shown;

[0027] When the amplitude of a certain frequency in the spectrum data exceeds its corresponding set threshold, the main controller sends an alarm signal.

[0028] The alarm signal sent by the main controller can be understood as sending out sound and light signals to inform passengers; it can also be an electrical signal notifying the control system of the elevator to stop the elevator running or reduce the running speed of the elevator...

Embodiment 2

[0031] Based on the elevator fault diagnosis device of Embodiment 1, the sensor is arranged on the speed governor.

[0032] Preferably, the sensor is a speed governor encoder.

Embodiment 3

[0034] Based on the elevator fault diagnosis device of Embodiment 1, the sensor is arranged on the car.

[0035] Preferably, the sensor can detect the position and / or speed of the car based on the principle of sound, light or electricity. Such as laser range finder, elevator shaft absolute position detector and other sensors.

[0036] Preferably, the sensor is directly installed on the car, or connected to the car through physical components, and it can detect the position and / or running speed of the car.

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Abstract

The invention discloses an elevator fault diagnosis device, which comprises a main controller and a sensor. The sensor is used for detecting the position and / or the speed of the elevator cage. The main controller carries out frequency spectrum analysis on the detected position and / or running speed of the elevator cage to obtain frequency spectrum data when the elevator cage is running. The frequency spectrum data can reflect each vibration frequency component and the amplitude distribution of the vibration frequency component when the elevator cage is running. When the amplitude of a certain frequency in the spectrum data exceeds the corresponding set threshold value, the main controller sends out an alarm signal. The elevator fault diagnosis device can monitor the running state of the elevator, effectively detect the elevator fault, is practical and reliable, improves the running safety of the elevator and is low-cost.

Description

technical field [0001] The present invention relates to elevator control technology, more specifically to an elevator fault diagnosis device. Background technique [0002] Elevators are increasingly inseparable from people's daily lives. Due to improper installation, or the influence of factors such as wear and tear of components, vibrations with relatively large amplitudes may occur during the operation of the elevator, which will affect the comfort of passengers. The current general countermeasure is regular maintenance, through the perception of maintenance personnel or instrument detection, check the vibration of the car, and make targeted rectification according to the vibration. Such a regular maintenance method is difficult to ensure that the work is in place in time. [0003] Chinese invention patent 201210194098.X discloses an elevator fault early warning system and its early warning method. Through the three-axis acceleration sensor installed on the car, the moni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B5/00B66B5/02
CPCB66B5/0006B66B5/0018B66B5/02
Inventor 刘玉兵奚良张筱
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD
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