EP2687471B1 - Elevator control device - Google Patents

Elevator control device Download PDF

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Publication number
EP2687471B1
EP2687471B1 EP11861300.9A EP11861300A EP2687471B1 EP 2687471 B1 EP2687471 B1 EP 2687471B1 EP 11861300 A EP11861300 A EP 11861300A EP 2687471 B1 EP2687471 B1 EP 2687471B1
Authority
EP
European Patent Office
Prior art keywords
image
car
indication
elevator
detects
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11861300.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2687471A1 (en
EP2687471A4 (en
Inventor
Shingo KONDO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP2687471A1 publication Critical patent/EP2687471A1/en
Publication of EP2687471A4 publication Critical patent/EP2687471A4/en
Application granted granted Critical
Publication of EP2687471B1 publication Critical patent/EP2687471B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
    • B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/3492—Position or motion detectors or driving means for the detector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
    • B66B3/02—Position or depth indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B19/00—Mining-hoist operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0087—Devices facilitating maintenance, repair or inspection tasks

Definitions

  • the present invention relates to an elevator controller in which the traction driving system is adopted.
  • Patent Literatures 1 and 2 below disclose techniques related to the detection of a car position of an elevator.
  • a cam switch is installed on the car of an elevator. This cam switch goes into action when the car reaches a top end portion or a bottom end portion of a shaft, and outputs a signal responding to a car position. For this reason, for example, even in the case where slippage occurs between a main rope and a sheave, it is possible to accurately detect a car position in the end portion of the shaft.
  • a position code is indicated along an elevator shaft. This position code is read by a camera installed on a car of the elevator, whereby a car position is detected.
  • EP 1 698 580 A1 discloses an elevator controller according to the preamble of independent claims 1 and 4.
  • Patent Literature 1 has the problem that the installation and position adjustment of the cam switch require much labor and time and that a difference in installation accuracy occurs depending on the skills of workers. Furthermore, there arises the problem that noises are generated when the cam switch goes into action.
  • Patent Literature 2 a problem similar to the problem of Patent Literature 1 occurs although no noises are generated.
  • the present invention was made to solve the problems described above and an object of the invention is to provide an elevator controller which can substantially simplify the labor for installation and adjustment and can detect a car position with high accuracy regardless of the skills of workers who perform installation and adjustment.
  • An elevator controller of the invention is a controller which comprises an encoder which detects the rotation of a sheave of an elevator, first position detection means which detects a present position of a car of the elevator on the basis of detection results of the encoder, an image indication part which is provided in an end portion of a shaft and indicates an image showing prescribed position information, an image detection part which is provided on the car and detects an image indicated on the image indication part, second position detection means which detects a present position of the car on the basis of detection results of the image detection part, and an image writing part which adjusts the position of an image indicated on the image indication part on the basis of the car positions detected by the first position detection means and the second position detection means.
  • an elevator controller of the invention is a controller which comprises an encoder which detects the rotation of a sheave of an elevator, first position detection means which detects a present position of a car of the elevator on the basis of detection results of the encoder, an image indication part which is provided in an end portion of a shaft and indicates an image showing prescribed position information, an image detection part which is provided on the car and detects an image indicated on the image indication part, second position detection means which detects a present position of the car on the basis of detection results of the image detection part, and control means which controls actions of the car on the basis of the car positions detected by the first position detection means and the second position detection means.
  • the image indication part can change an indication position of an image from a prescribed device when the device is connected thereto and can hold indication contents even when power is not supplied.
  • the present invention it is possible to substantially simplify the labor for installation and adjustment, and to detect a car position with high accuracy regardless of the skills of workers who perform installation and adjustment.
  • Figure 1 is a block diagram showing an elevator controller in a first embodiment according to the present invention.
  • reference numeral 1 denotes a shaft of an elevator
  • reference numeral 2 denotes a car of the elevator
  • reference numeral 3 denotes a counterweight.
  • the car 2 and the counterweight 3 are suspended by a main rope 4 in a well bucket manner in the shaft 1.
  • Reference numeral 5 denotes a sheave of a traction machine which is a driving device of the elevator
  • reference numeral 6 denotes a motor of the traction machine.
  • the main rope 4 is such that part thereof is wound on the sheave 5.
  • the car 2 ascends and descends in the shaft 1 in a direction responding to the moving direction of the main rope 4. That is, Figure 1 shows an elevator in which the traction driving system is adopted.
  • the counterweight 3 ascends and descends in the shaft 1 in a direction reverse to the car 2.
  • Reference numeral 7 denotes a guide rail which guides the ascent and descent of the car 2.
  • the guide rail 7 is installed vertically in the shaft 1.
  • Reference numeral 8 denotes a braking device, and reference numeral 9 denotes an encoder.
  • the braking device 8 and the encoder 9 may be configured as part of the traction machine.
  • the braking device 8 is intended for holding the car 2 at a standstill.
  • the braking device 8 goes into action at a stop of the car 2 and prevents the sheave 5 from rotating.
  • the encoder 9 is intended for detecting the rotation of the sheave 5.
  • the encoder 9 is installed, for example, on the shaft of the sheave 5, and outputs a signal responding to the rotational direction and rotation angle of the sheave 5.
  • a signal outputted from the encoder 9 is inputted to a control panel 10 of the elevator.
  • the control panel 10 is provided with position detection circuits 11 and 12 and a control circuit 13.
  • the position detection circuit 11 detects a present position of the car 2 (a car position) on the basis of a signal (detection results) from the encoder 9.
  • the function of the position detection circuit 11 may be provided in the encoder 9 itself. In this case, position information indicating a car position is inputted to the control panel 10 from the encoder 9.
  • the encoder 9 outputs a signal responding to the rotation of the sheave 5. For this reason, when slippage occurs between the main rope 4 and the sheave 5, a car position detected by the position detection circuit 11 shifts from an actual car position. On the other hand, in the case where the car 2 of the elevator has approached an end portion (a top end portion or a bottom end portion) of the shaft 1, it is necessary to perform control, such as deceleration and stop, at an appropriate timing in order to avoid the collision of the car 2. For this reason, car position detection means is provided in the elevator, apart from the means comprising the encoder 9 and the position detection circuit 11.
  • the above-described car position detection means is intended for detecting the presence of the car 2 accurately in the end portions (the top end portion and the bottom end portion) of the shaft 1.
  • the car position detection means is such that the principal part thereof is composed of image indication parts 14 and 15, an image detection part 16, a position detection circuit 12, and a control circuit 13.
  • the image indication parts 14 and 15 are intended for indicating an image showing prescribed position information.
  • electronic paper is used as the image indication parts 14 and 15.
  • the portion indicating the image is made of electronic paper, whereby it is possible to change the indication contents (image) and indication position arbitrarily. Furthermore, with electronic paper, it is possible to hold indication contents for a long period even when power is not supplied.
  • the image indication part 14 is provided in the top end portion of the shaft 1.
  • the image indication part 14 is fixed to a top end portion of the guide rail 7 via a support arm 17, for example.
  • the image indication part 15 is provided in the bottom end portion of the shaft 1.
  • the image indication part 15 is fixed to a bottom end portion of the guide rail 7 via a support arm 18, for example.
  • the image indication parts 14 and 15 are disposed in such a manner that the indication surfaces for indicating the image face the car 2 side along the ascent and descent direction of the car 2.
  • the image detection part 16 is intended for detecting images indicated on the image indication parts 14 and 15.
  • the image detection part 16 is provided on the car 2.
  • the image detection part 16 is disposed in such a manner as to be opposed to the image indication part 14 when the car 2 has reached a prescribed upper position. That is, when the car 2 has reached the upper position, the image indicated on the image indication part 14 is detected by the image detection part 16.
  • the image detection part 16 On detecting the image of the image indication part 14, the image detection part 16 outputs the detection results (image information) to the control panel 10.
  • the image detection part 16 is disposed in such a manner as to be opposed to the image indication part 15 when the car 2 has reached a prescribed lower position. When the car 2 has reached the lower position, the image indicated on the image indication part 15 is detected by the image detection part 16.
  • the image detection part 16 On detecting the image of the image indication part 15, the image detection part 16 outputs the detection results (image information) to the control panel 10.
  • the position detection circuit 12 of the control panel 10 detects a present position of the car 2 on the basis of the information (detection results) from the image detection part 16. For example, the position detection circuit 12 analyzes the image information sent from the image detection part 16, and compares the image information with pre-registered information. Then the position detection circuit 12 makes a determination as to whether the car 2 is in the upper position or lower position.
  • the function of the position detection circuit 12 may be provided in the image detection part 16 itself. In this case, the position information indicating a car position is inputted to the control panel 10 from the image detection part 16.
  • control circuit 13 controls the actions of the car 2 on the basis of a car position detected by the position detection circuit 11 and a signal from a landing switch (not shown). Furthermore, the control circuit 13 changes the actions of the car 2 on the basis of a car position detected by the position detection circuit 12. For example, when it is detected by the position detection circuit 12 that the car 2 is in a prescribed upper position or lower position, the control circuit 13 performs control, such as deceleration and stop, at appropriate timing.
  • Figure 2 is a diagram to explain the function of the controller shown in Figure 1
  • Figure 3 is a flowchart showing the actions of the elevator controller in the first embodiment according to the present invention.
  • Reference numeral 19 shown in Figure 1 denotes an image writing part intended for causing the image indication parts 14 and 15 to indicate an image and for adjusting the indication position of an image.
  • the image writing part 19 is connected to the control panel 10 and the image indication parts 14 and 15.
  • An image showing prescribed position information must be indicated in a position (at a height) necessary for making action changes of the car 2 in order to ensure safe operations of the elevator. For example, for the duration from the detection of an image indicated on the image indication part 14 (or 15) by the image detection part 16 to the start of an action change of the car 2 (for example, deceleration and stop) by the control circuit 13, the time required by the position detection circuit 12 and the control circuit 13 to perform computation elapses. For this reason, in order to accurately detect a car position in an end portion of the shaft 1, it is necessary to cause the image indication parts 14 and 15 to indicate the image also in consideration of a delay in computation by the position detection circuit 12 and the control circuit 13. Furthermore, in order to ensure that the image is detected accurately by the image detection part 16, also the length of the image (the width in the ascent and descent direction of the car 2) is necessary to some extent.
  • the distance B can be expressed by the following expression (see Figure 2 ).
  • B A + ⁇ ⁇ t 1 + ⁇ ⁇ t 2 ⁇ v
  • the image writing part 19 causes an image showing position information to be indicated, for example, between the height B which is calculated by Expression 1 above and the height A.
  • the image which is indicated on the image indication parts 14 and 15 may be a simple one, such as a bar code shown in Figure 2 , for example.
  • a specific method of indication setting for the image is as shown in Figure 3 .
  • the image writing part 19 When during the installation of an elevator, after necessary devices, such as a traction machine and the image indication parts 14 and 15, are attached, the image writing part 19 is connected to the control panel 10 and the image indication parts 14 and 15. The image writing part 19 causes the image indication parts 14 and 15 to indicate an image showing prescribed position information.
  • the car 2 is caused to run between the top floor and the bottom floor in a reciprocating manner. Specifically, first, the car 2 is caused to run downward and to stop at the bottom floor (S101). Next, the car 2 is caused to run upward and to stop at the top floor (S102). Furthermore, the car 2 is caused to run downward and to stop at the bottom floor (S103).
  • the position detection circuits 11 and 12 perform the detection of a car position on the basis of input information.
  • the control circuit 13 compares the car position detected by the position detection circuit 11 with the car position detected by the position detection circuit 12 and calculates an error in the indication position of an image indicated on the image indication parts 14 and 15. On calculating the error in the indication position, the control circuit 13 sends the calculation results (error) to the image writing part 19 (S104). On the basis of the error calculated by the control circuit 13, the image writing part 19 adjusts (changes) the positions of the images indicated in the image indication parts 14 and 15 so that the indication position of the image satisfies Expression 1 above (S105).
  • the image writing part 19 performs the position adjustment of the images indicated on the image indication parts 14 and 15 on the basis of the car position detected by the position detection circuit 11.
  • the processing in S104 may be carried out in the image writing part 19.
  • the car position detected by the position detection circuit 11 and the car position detected by the position detection circuit 12 are inputted to the image writing part 19.
  • the image writing part 19 is detached from the control panel 10 and the image indication parts 14 and 15.
  • the controller having the above-described configuration, it becomes possible to detect a car position with high accuracy in end portions of the shaft 1.
  • the detection accuracy is not influenced by the skills of workers who perform installation and adjustment.
  • the position adjustment of an image is possible after the installation of the image indication parts 14 and 15, it is possible to substantially simplify the labor for installation and adjustment.
  • the image indication parts 14 and 15 If electronic paper is used as the image indication parts 14 and 15, it is possible to hold indication contents without power supply and, therefore, it is possible to reduce maintenance costs after image setting. Furthermore, because it is impossible to change the indication contents and indication positions of the image indication parts 14 and 15 unless the image writing part 19 is connected, it is possible to prevent mischieves and malfunctions. In addition, if the image writing part 19 is configured in a detachable manner, it is unnecessary to install the image writing part 19 in individual elevators. For this reason, the above-described function can be realized at low cost.
  • the image indication part 14 is caused to indicate a plurality of images, if the indication position of one image can be appropriately set, the indication positions of other images can be easily set in a relative relation to the one image. The same applies also to the image indication part 15.
  • the controller of the present invention can be applied to an elevator provided with the function of detecting a car position in an end portion of the shaft.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
EP11861300.9A 2011-03-16 2011-03-16 Elevator control device Active EP2687471B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/056174 WO2012124068A1 (ja) 2011-03-16 2011-03-16 エレベーターの制御装置

Publications (3)

Publication Number Publication Date
EP2687471A1 EP2687471A1 (en) 2014-01-22
EP2687471A4 EP2687471A4 (en) 2014-11-19
EP2687471B1 true EP2687471B1 (en) 2015-09-09

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ID=46830197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11861300.9A Active EP2687471B1 (en) 2011-03-16 2011-03-16 Elevator control device

Country Status (5)

Country Link
EP (1) EP2687471B1 (ja)
JP (1) JP5527475B2 (ja)
KR (1) KR101502264B1 (ja)
CN (1) CN103391894B (ja)
WO (1) WO2012124068A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11597632B2 (en) 2017-06-01 2023-03-07 Otis Elevator Company Image analytics for elevator maintenance

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6175409B2 (ja) * 2014-06-13 2017-08-02 株式会社日立ビルシステム 位置検出装置の動作確認用治具
TWI673229B (zh) * 2014-12-02 2019-10-01 瑞士商伊文修股份有限公司 用於判定電梯車廂位置的方法和系統以及電梯系統
CN106698119A (zh) * 2017-03-07 2017-05-24 江苏西德电梯有限公司 一种基于二维码楼层信息的智能电梯光电开关
JP6673618B1 (ja) * 2019-03-20 2020-03-25 東芝エレベータ株式会社 エレベータシステム
JP6958767B2 (ja) * 2019-07-05 2021-11-02 三菱電機株式会社 エレベーターの制御システム
KR102187699B1 (ko) 2020-08-25 2020-12-07 주식회사 비티알수성 승강기용 구동기의 엔코더 설치구조
KR102588672B1 (ko) 2021-12-30 2023-10-13 (주)디 앤드 디 승강기의 양측형 엔코더 설치 구조

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JPH07223783A (ja) 1994-02-10 1995-08-22 Hitachi Ltd エレベーターの端階安全装置
CN1720188A (zh) * 2002-12-30 2006-01-11 奥蒂斯电梯公司 位置基准系统
JP2005126164A (ja) 2003-10-21 2005-05-19 Mitsubishi Electric Corp エレベーターの位置検出装置
AU2003293208A1 (en) * 2003-11-26 2005-07-21 Otis Elevator Company Device and method for self-aligning position reference system
DE502005000701D1 (de) * 2005-03-05 2007-06-21 Thyssenkrupp Aufzugswerke Gmbh Aufzuganlage
JP2007171629A (ja) * 2005-12-22 2007-07-05 Asahi Glass Co Ltd 情報提供方法および装置
JP4380708B2 (ja) * 2007-01-26 2009-12-09 株式会社日立製作所 エレベータ装置
JP2009214965A (ja) * 2008-03-07 2009-09-24 Toshiba Elevator Co Ltd エレベータ
JP2010100395A (ja) * 2008-10-23 2010-05-06 Toshiba Elevator Co Ltd エレベータ装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11597632B2 (en) 2017-06-01 2023-03-07 Otis Elevator Company Image analytics for elevator maintenance

Also Published As

Publication number Publication date
WO2012124068A1 (ja) 2012-09-20
EP2687471A1 (en) 2014-01-22
CN103391894A (zh) 2013-11-13
KR101502264B1 (ko) 2015-03-12
CN103391894B (zh) 2015-08-19
KR20130143645A (ko) 2013-12-31
JPWO2012124068A1 (ja) 2014-07-17
JP5527475B2 (ja) 2014-06-18
EP2687471A4 (en) 2014-11-19

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