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Position reference device for elevator

A reference device, elevator technology, applied in the direction of electromagnetic measuring device, electric/magnetic position measurement, measuring device, etc., which can solve problems such as deviation, large position, and decreased accuracy

Active Publication Date: 2019-12-27
OTIS ELEVATOR CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, since the magnetic flux can spread in vertical upward and downward directions relative to the leveling surface, the accuracy is reduced, and there is a possibility that the stopping position of the elevator car can be skewed upwards or downwards, which can cause Large position error or floor leveling deviation

Method used

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  • Position reference device for elevator
  • Position reference device for elevator
  • Position reference device for elevator

Examples

Experimental program
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Embodiment Construction

[0031] figure 1 A graphical representation of various components of an elevator system 1 according to an embodiment of the invention is shown. The elevator system 1 comprises an elevator car 2 configured to move vertically upwards and downwards within a hoistway 3 . The elevator system 1 also comprises a counterweight 4 operatively connected to the elevator car 2 by a plurality of tension members 5 , such as steel cables or flat belts, which wind along a traction sheave 6 connected to an elevator 7 . The traction sheave 6 has an encoder 8 for measuring the movement of the traction sheave 6 to detect the position of the elevator car 2 within the hoistway 3 . The encoder 8 is connected to the elevator controller 9 to control the movement of the elevator car 2 using the elevator based on the information from the encoder 8 . The controller 9 is generally provided in a machine room above the top floor of the building or in an operational control panel arranged at any specific loc...

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PUM

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Abstract

A position reference device for an elevator includes a magnet disposed at a stopping position of an elevator car at a landing within a hoistway, a magnetic sensor mounted on the elevator car for detecting magnetic intensity of the magnet by a plurality of points arranged in the vertical direction of the magnetic sensor, and a processing device for determining a vertical center of the magnet.

Description

technical field [0001] The present invention generally relates to elevator installations for detecting leveling deviations between elevator car landings and floors of landings. More specifically, the present invention relates to position referencing devices for releveling elevator cars. Background technique [0002] Typically, an encoder at the traction sheave is used to determine the position of the elevator car in the elevator system. However, in high-rise buildings, the encoder may not be able to accurately detect the car position when the elevator car arrives at a landing because tension members such as wire ropes or flat belts tend to behave like springs due to their elasticity. To aid in more accurate detection of car stop positions, position reference devices such as optical ray switches or magnetic switches may be provided in elevator systems. [0003] A light ray switch generally comprises a light sensor installed on a part of the elevator car and a plurality of v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B5/00
CPCB66B5/00B66B1/40B66B1/44B66B1/28B66B1/3492G01B7/003G01D5/145G01D5/2454
Inventor 村田二郎
Owner OTIS ELEVATOR CO