WO2009073025A1 - Control strategy for operating two elevator cars in a single hoistway - Google Patents
Control strategy for operating two elevator cars in a single hoistway Download PDFInfo
- Publication number
- WO2009073025A1 WO2009073025A1 PCT/US2007/086448 US2007086448W WO2009073025A1 WO 2009073025 A1 WO2009073025 A1 WO 2009073025A1 US 2007086448 W US2007086448 W US 2007086448W WO 2009073025 A1 WO2009073025 A1 WO 2009073025A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- door
- hoistway
- monitor module
- relay
- elevator car
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/22—Operation of door or gate contacts
Definitions
- Elevator systems most commonly include a single elevator car within a hoistway. It has been proposed to include two elevator cars within a single hoistway. While such a proposal can be found in the patent literature dating back many years, it has been uncommon to implement such a system. There are various challenges associated with attempting to include two elevator cars within a single hoistway.
- An exemplary device for controlling two elevator cars within an elevator hoistway includes a door monitor module that facilitates controlling movement of elevator cars.
- the door monitor module is configured to determine when at least one door along a hoistway is open.
- the door monitor module places a first relay in a selected operative state if a first elevator car is stopped at a landing corresponding to the open door.
- the door monitor module places a second relay in a selected operative state if a second elevator car is stopped at a landing corresponding to the at least one open door.
- the door monitor module is also configured to place both relays into the selected operative state if neither of the elevator cars is stopped at a landing corresponding to an open door along a hoistway.
- Figure 1 schematically illustrates selected portions of an elevator system including an example embodiment of this invention.
- FIG. 1 schematically illustrates selected portions of an elevator system 20.
- a first elevator car 22 and a second elevator car 24 are each situated for movement within a single hoistway 26.
- the first elevator car 22 can be considered an upper car because it is vertically above the second elevator car 24, which can be referred to as a lower car.
- the hoistway 26 includes a plurality of hoistway doors that operate in a known manner to provide access to the hoistway 26.
- the lower car 24 is stopped at a landing corresponding to one of the doors 30 to provide service to a passenger at that building level.
- the upper car 22 is moving and is currently between the doors 32 and 34 as schematically shown.
- Each door includes a door lock switch 40 that operates in a known manner to provide an indication of when the door lock of the associated door has been opened.
- An open door lock is used in some examples as an indication of an open door. Whenever one of the doors that provide access to the hoistway 26 is unlocked, it is considered to be an open door, which indicates a situation where elevator car movement may be undesirable.
- each door lock switch 40 is associated with a communication module 42 that provides an indication of the condition of the associated door lock.
- Each of the communication modules 42 communicates over a communication link 44 with a door monitor module (DMM) 46.
- the communication link 44 comprises a serial data bus.
- Example communication links 44 facilitate communications using remote serial link (RSL) or controller area network (CAN) techniques.
- RSL remote serial link
- CAN controller area network
- the DMM 46 controls a relay switching arrangement 50.
- This example includes a first relay switch 52 associated with a first elevator car controller 54, which is the upper car controller (UCC) in this example.
- a second relay switch 56 is associated with a second elevator car controller 58, which is the lower car controller (LCC) in this example.
- the DMM 46 independently controls the relay switches 52 and 56 for purposes of controlling movement of the corresponding elevator car 22 or 24 depending on the status of the doors along the hoistway 26 and the positions of the cars 22, 24.
- the DMM 46 is configured to determine whenever there is an open door based upon an indication from one of the communication modules 42. The DMM 46 also determines whether one of the elevator cars 22 or 24 is located at a landing corresponding to the open door. In that case, that car should be prevented from moving and the corresponding switch within the relay arrangement 50 is moved into an appropriate operative state (e.g., opening the relay contacts) to provide an indication to the corresponding controller 54 or 58 to prevent movement of that elevator car. In the illustrated example, the door 30 is open because the lower elevator car 24 is positioned at that landing for servicing passengers. The DMM 46 determines that the door 30 is open and that the elevator car 24 is at that landing.
- the DMM 46 then controls operation of the relay switch 56 so that the LCC 58 receives an indication to prevent movement of the elevator car 24.
- One feature of the illustrated example is that it allows for an elevator car controller that is designed to detect an open relay along a safety chain to be used without altering the configuration of the controller.
- the LCC 58 is designed to detect when there is an open relay switch corresponding to an open door along the hoistway 26. In the illustrated example, the LCC 58 receives such an indication when the relay switch 56 is opened by the DMM 46. This allows for realizing a two car system without requiring a different or redesigned car controller.
- the UCC 54 detects when the relay switch 52 is in an operative state corresponding to an open door (e.g., the contacts of the relay switch 52 are opened by the DMM 46).
- the upper elevator car 22 is moving between landings and is not positioned near any open doors. It is desirable under such circumstances to allow the upper car 22 to continue moving to provide the intended passenger service, which requires movement of the elevator car 22.
- the DMM 46 keeps the relay switch 52 closed so that the UCC 54 controls movement of the elevator car 22 to allow it to continue to move even though one of the hoistway doors 30 is open.
- the DMM 46 allows for independently controlling movement of the elevator cars 22 and 24 even though a hoistway door is open. There will be some circumstances where both elevator cars 22 and 24 should be prevented from moving. For example, if one of the door lock switches 40 indicates that the corresponding door is open and the DMM 46 determines that neither elevator car 22 or 24 is at a landing associated with that door, then both elevator cars 22 and 24 are prevented from moving. Under such circumstances, the DMM 46 places both relay switches 52 and 56 into an operative state that provides an indication to the UCC 54 and the LCC 58 that their corresponding car should be prevented from moving. This may occur during a maintenance operation, for example, where authorized personnel opens a hoistway door and requires access to the hoistway. It is desirable to prevent any elevator car movement under such circumstances without the express intention of the maintenance personnel as known
- the DMM 46 obtains information regarding the position of each elevator car for purposes of determining whether one of the cars is at a position corresponding to an open door.
- This example includes an elevator car position indicator 60 that is fixed along the hoistway.
- the position indicator comprises a steel tape that is positioned along or near one of the guide rails used for facilitating movement of the elevator cars.
- the upper elevator car 22 includes a plurality of detectors 62 and 64 that are supported for movement with the car.
- the lower elevator car 24 includes a plurality of detectors 66 and 68 that are supported for movement with that car.
- the detectors 66-68 detect an indication from the elevator car position indicator 60 based upon a non-repeating indication along the position indicator 60, which provides information regarding the position of the elevator car.
- the detectors 62-68 provide a corresponding signal to the DMM 46 regarding the current position of the corresponding elevator car.
- a plurality of detectors is included with each elevator car in this example so that the position detected by each can be cross-checked to confirm an accurate position indication.
- the DMM 46 controls the relay arrangement 50 to prevent movement of that elevator car.
- the DMM 46 will control the relay arrangement 50 to prevent movement of both elevator cars until the discrepancy can be resolved. Maintaining accurate elevator car position information facilitates smooth operation and the ability to allow one elevator car to continue moving even though another elevator car is stopped where a door is open.
- the position indicator 60 comprises a steel tape including a plurality of perforations 70 that establish a non-repeating gray code of position data along the indicator 60.
- the detectors 62-68 comprise optical readers that communicate serially over the traveling cable (not illustrated) to provide appropriate information to the DMM 46.
- the detectors 62-68 also determine velocity information, which is useful for elevator control purposes.
- the illustrated example includes redundancy that is schematically illustrated. For instance, this example has dual DMMs 46 and 46' that communicate with each other as a means of cross-checking. To have suitable redundancy, the illustrated example includes redundant door lock switches 40 and 40' at each door, redundant communications modules 42 and 42', redundant communication links 44 and 44', redundant first relay switches 52 and 52' and redundant second relay switches 56 and 56'.
- the dual-redundancy of the illustrated example provides the same functionality twice. That is, the illustrated components (e.g., the door lock switches 40 and 40', the communications modules 42 and 42', the relay arrangements 50 and 50' and the DMMs 46 and 46') perform identical functions in parallel. Additionally, the dual-redundancy allows for cross-checking between the DMMs 46 and 46'.
- the DMM 46 and the DMM 46' in this example are both configured to perform the same determinations regarding how to control the relay arrangements 50 and 50' respectively, for purposes of controlling movement of the elevator cars.
- the example DMMs communicate with each other to cross-check the determinations made by each. In the event that a determination made by one of the DMMs does not coincide with a corresponding determination made by the other, an error is indicated and the elevator system is temporarily taken out of service until the DMMs 46 or another portion of the control arrangement can be serviced.
- Providing more than one DMM allows for satisfying the type of elevator codes that require redundancy of elevator control devices. Additionally, more than one DMM allows for crosschecking the determinations made by each to facilitate more reliable elevator movement control.
Landscapes
- Elevator Control (AREA)
- Elevator Door Apparatuses (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
- Lock And Its Accessories (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES07854940T ES2393133T3 (en) | 2007-12-05 | 2007-12-05 | Control strategy for the operation of two elevator cars in a single hole |
CN200780101818.0A CN101888961B (en) | 2007-12-05 | 2007-12-05 | Control strategy for operating two elevator cars in a single hoistway |
JP2010536899A JP5215410B2 (en) | 2007-12-05 | 2007-12-05 | Control method for operating two elevator cars in a single hoistway |
RU2010127451/11A RU2484002C2 (en) | 2007-12-05 | 2007-12-05 | Device for controlling movement of lift cabin group in single well |
US12/742,261 US8292038B2 (en) | 2007-12-05 | 2007-12-05 | Control device for operating two elevator cars in a single hoistway |
PCT/US2007/086448 WO2009073025A1 (en) | 2007-12-05 | 2007-12-05 | Control strategy for operating two elevator cars in a single hoistway |
KR1020107014656A KR101207905B1 (en) | 2007-12-05 | 2007-12-05 | Control strategy for operating two elevator cars in a single hoistway |
EP07854940A EP2229331B1 (en) | 2007-12-05 | 2007-12-05 | Control strategy for operating two elevator cars in a single hoistway |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2007/086448 WO2009073025A1 (en) | 2007-12-05 | 2007-12-05 | Control strategy for operating two elevator cars in a single hoistway |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009073025A1 true WO2009073025A1 (en) | 2009-06-11 |
Family
ID=39592447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2007/086448 WO2009073025A1 (en) | 2007-12-05 | 2007-12-05 | Control strategy for operating two elevator cars in a single hoistway |
Country Status (8)
Country | Link |
---|---|
US (1) | US8292038B2 (en) |
EP (1) | EP2229331B1 (en) |
JP (1) | JP5215410B2 (en) |
KR (1) | KR101207905B1 (en) |
CN (1) | CN101888961B (en) |
ES (1) | ES2393133T3 (en) |
RU (1) | RU2484002C2 (en) |
WO (1) | WO2009073025A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010072658A1 (en) * | 2008-12-26 | 2010-07-01 | Inventio Ag | Elevator system with a safety device |
EP2284110A1 (en) * | 2009-08-14 | 2011-02-16 | K.A. Schmersal Holding GmbH & Co. KG | Electronic safety system for a lift |
CN102933478A (en) * | 2010-06-16 | 2013-02-13 | 奥的斯电梯公司 | Method and system for determining elevator car position |
EP2998259A1 (en) * | 2014-09-18 | 2016-03-23 | Kone Corporation | An elevator system and a method for controlling elevator safety |
WO2018019639A1 (en) * | 2016-07-28 | 2018-02-01 | Inventio Ag | Hoistway door lock with reed switches |
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WO2013140598A1 (en) * | 2012-03-23 | 2013-09-26 | 三菱電機株式会社 | Elevator control device |
US9274480B1 (en) * | 2014-10-02 | 2016-03-01 | Xerox Corporation | Paper tray size sensing mechanism |
WO2016062686A1 (en) | 2014-10-21 | 2016-04-28 | Inventio Ag | Elevator comprising a decentralized electronic safety system |
WO2017001883A1 (en) | 2015-06-30 | 2017-01-05 | Otis Elevator Company | Elevator car location zones in hoistway |
AU2016231585B2 (en) * | 2015-09-25 | 2018-08-09 | Otis Elevator Company | Elevator component separation assurance system and method of operation |
EP3187450B1 (en) * | 2015-11-18 | 2024-02-21 | Otis Elevator Company | Elevator hoistway access safety |
RU2635265C1 (en) * | 2016-12-09 | 2017-11-09 | Общество с Ограниченной Ответственностью "Инженерное Бюро Воронежского Акционерного Самолетостроительного Общества" | Snf ampoule code reader |
US10081513B2 (en) | 2016-12-09 | 2018-09-25 | Otis Elevator Company | Motion profile for empty elevator cars and occupied elevator cars |
US10483740B1 (en) * | 2018-10-12 | 2019-11-19 | Kone Corporation | Floor board junction box |
CN117203142A (en) * | 2021-04-22 | 2023-12-08 | 三菱电机株式会社 | Landing door switch circuit |
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2007
- 2007-12-05 US US12/742,261 patent/US8292038B2/en active Active
- 2007-12-05 KR KR1020107014656A patent/KR101207905B1/en active IP Right Grant
- 2007-12-05 EP EP07854940A patent/EP2229331B1/en not_active Not-in-force
- 2007-12-05 RU RU2010127451/11A patent/RU2484002C2/en not_active IP Right Cessation
- 2007-12-05 ES ES07854940T patent/ES2393133T3/en active Active
- 2007-12-05 CN CN200780101818.0A patent/CN101888961B/en active Active
- 2007-12-05 WO PCT/US2007/086448 patent/WO2009073025A1/en active Application Filing
- 2007-12-05 JP JP2010536899A patent/JP5215410B2/en not_active Expired - Fee Related
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---|---|---|---|---|
WO2010072658A1 (en) * | 2008-12-26 | 2010-07-01 | Inventio Ag | Elevator system with a safety device |
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EP2998259A1 (en) * | 2014-09-18 | 2016-03-23 | Kone Corporation | An elevator system and a method for controlling elevator safety |
WO2018019639A1 (en) * | 2016-07-28 | 2018-02-01 | Inventio Ag | Hoistway door lock with reed switches |
Also Published As
Publication number | Publication date |
---|---|
US20100270109A1 (en) | 2010-10-28 |
EP2229331A1 (en) | 2010-09-22 |
US8292038B2 (en) | 2012-10-23 |
JP5215410B2 (en) | 2013-06-19 |
RU2484002C2 (en) | 2013-06-10 |
RU2010127451A (en) | 2012-01-10 |
KR20100093584A (en) | 2010-08-25 |
JP2011506223A (en) | 2011-03-03 |
ES2393133T3 (en) | 2012-12-18 |
CN101888961A (en) | 2010-11-17 |
EP2229331B1 (en) | 2012-08-15 |
KR101207905B1 (en) | 2012-12-04 |
CN101888961B (en) | 2014-04-02 |
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