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System and method for detecting relative position and speed of elevator car

An elevator car and relative position technology, applied in the field of elevators, can solve the problems that coded information is easily affected by electromagnetic, temperature, oil pollution, etc., inconvenient application, expensive, etc., and achieve the effect of simple application, low cost, and improved detection accuracy

Inactive Publication Date: 2015-12-23
HITACHI ELEVATOR CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coding tape needs to be coded by related technologies, which is expensive. The code tape is easy to break when installed in the shaft, and the coded information is easily affected by electromagnetic, temperature, oil pollution, etc., which is inconvenient to use.

Method used

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  • System and method for detecting relative position and speed of elevator car
  • System and method for detecting relative position and speed of elevator car
  • System and method for detecting relative position and speed of elevator car

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below in conjunction with accompanying drawings:

[0030] Such as figure 1 As shown, a relative position and speed detection system of an elevator car includes a hoistway 10, an elevator car 20 located in the hoistway 10 and a reference object 30, an imaging device 40 for continuously photographing the reference object 30, and an imaging device 40 electrically The controller 50 is connected with each other, the imaging device 40 is arranged on the elevator car 20, and the reference object 30 is arranged along the moving track of the elevator car 20.

[0031] When the elevator is running normally, the imaging device 40 periodically takes pictures of the reference object 30, and the imaging device 40 sends the captured images to the controller 50, such as figure 2 with image 3 As shown, assuming that the time interval between two images having the same feature value 60 is t, the two images are obtained in th...

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PUM

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Abstract

The invention relates to a system and method for detecting the relative position and the speed of an elevator car. The system comprises a shaft, the elevator car, reference objects, an imaging device used for continuously shooting the reference objects, and a controller electrically connected with the imaging device. The elevator car and the reference objects are located in the shaft, the imaging device is arranged on the elevator car, and the reference objects are arranged along the moving track of the elevator car. The imaging device and the elevator car move simultaneously, the actual position of the car can be truly and reliably detected by conducting shooting and image recognition on the reference objects in the shaft, the detection deviation caused by skidding of a rotary component is avoided, and the detection precision is improved; the reference objects are shot through the imaging device, the reference objects do not need to be specially coded or printed with special images, application is easy and convenient, cost is low, installation and adjustment are convenient, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to an elevator car relative position and speed detection system and detection method. Background technique [0002] At present, the elevator is a necessary means of transportation in modern buildings, and its control system needs to accurately detect the position of the car in order to realize related safety control functions. At present, in the elevator industry, there are mainly three methods for detecting the position of the car: 1. Rotary encoder measurement method. In this method, due to the large inertia of the traction sheave or the anti-rope pulley, the steel wire rope on the wheel is prone to large elastic slippage, and the position data of the car is obtained through the rotation amount of the traction sheave or the anti-rope pulley, and the error is relatively large; and When the elevator encounters a fault and needs to stop urgently during the running of the express t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B5/00
Inventor 郭志海杜广荣
Owner HITACHI ELEVATOR CHINA
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