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WO2007018540A1 - Systeme d'avertissement pour les techniciens travaillant dans des gaines d'ascenseurs - Google Patents

Systeme d'avertissement pour les techniciens travaillant dans des gaines d'ascenseurs Download PDF

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Publication number
WO2007018540A1
WO2007018540A1 PCT/US2005/028153 US2005028153W WO2007018540A1 WO 2007018540 A1 WO2007018540 A1 WO 2007018540A1 US 2005028153 W US2005028153 W US 2005028153W WO 2007018540 A1 WO2007018540 A1 WO 2007018540A1
Authority
WO
WIPO (PCT)
Prior art keywords
mechanic
cab
hoistway
sensing
sensed
Prior art date
Application number
PCT/US2005/028153
Other languages
English (en)
Inventor
Jae-Hyuk Oh
Alberto Vecchiotti
Steven M. Skolnick
William A. Veronesi
Norbert Hootsmans
Original Assignee
Otis Elevator Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Otis Elevator Company filed Critical Otis Elevator Company
Priority to PCT/US2005/028153 priority Critical patent/WO2007018540A1/fr
Publication of WO2007018540A1 publication Critical patent/WO2007018540A1/fr

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • 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
    • B66B5/0043—Devices enhancing safety during maintenance
    • B66B5/005—Safety of maintenance personnel

Definitions

  • the present invention relates to elevator systems, and in particular to a warning system for mechanics performing work in elevator hoistways.
  • a mechanic can be faced with dangerous situations caused by a moving elevator cab and a moving counterweight. For example, a mechanic must avoid a collision with the top of the hoistway when working on top of the cab. A mechanic working on top of the cab must also avoid collision with a passing counterweight for that cab or for a cab in an adjacent hoistway. When working in the pit, the mechanic must avoid a collision with either a cab or a counterweight moving downward into the pit.
  • the present invention is a system and method that warns mechanics of approaching danger caused by a moving elevator cab or counterweight when the mechanic is either on top of the cab, or in the pit area.
  • the system determines cab position within the hoistway and senses presence of the mechanic either on top of the cab or in the bottom of the hoistway.
  • a voice-based warning is provided to the mechanic of any approaching danger based upon sensed cab position and the location of the mechanic.
  • FIG. 1 is a schematic diagram showing an elevator system having multiple hoistways and having cab position and mechanic position sensing used by the warning system of the present invention.
  • FIG.2 shows an example of a coded ultrasonic signal used to inform the warning device of the sensed location of the mechanic.
  • FIG.3 shows a portable device for providing voice-based warnings to a mechanic working within a hoistway of the elevator system of FIG. 1.
  • FIG.4 is a chart illustrating the sensed cab positions and the sensed mechanic positions that result in production of a voice-based warning to the mechanic.
  • FIG. 1 shows elevator system 10 in which the warning system of the invention is implemented.
  • Elevator system 10 has multiple hoistways HW1 through HWN.
  • hoistways HW1 , HW2, HW3, and HWN are shown.
  • Each hoistway HW1-HWN includes elevator cab 12, drive system 14, counterweight 16, top limit switch 18, and bottom limit switch 20.
  • FIG. 1 illustrates three ranges R1 , R2, and R3 where hazards can be presented fora mechanicworking in hoistways HW1-HWN.
  • Range R1 isatthe top of the hoistway, and is an area where a mechanicworking on top of cab 12 must avoid contact with the top end of the hoistway.
  • Range R2 is an intermediate area within the hoistway where a mechanic on top of cab 12 must avoid contact with a passing counterweight in that hoistway or an adjacent hoistway.
  • Range R3 defines the pit area at the bottom end of each hoistway. A mechanicworking in range R3 must avoid contact with a descending cab 12 or counterweight 16 within a particular hoistway and any adjacent hoistway.
  • the warning system of the present invention helps a mechanic to avoid these hazards by sensing elevator position within each hoistway HW1-HWN, sensing mechanic position either on top of cab 12 or within the pit area (range R3) of each hoistway, and providing voice-based warning to the mechanic based upon the sensed elevator and mechanic positions.
  • elevator position sensing is accomplished with RFID sensing technology
  • mechanic position sensing is achieved using ultrasonic motion detection and ultrasonic signal transmission.
  • Elevator position sensing in each hoistway HW 1 -HWN is provided by RFID reader 22 and multiple passive RFID tags 24a-24h.
  • RFID reader 22 is a low cost, short range (less than 10 cm) RFID reading device carried on cab 12.
  • Eachtag24a-24h hasa unique lDwhich is read byRFID reader22ascab 12 passes.
  • RFID tags 24a-24h are arranged in pairs and are spaced about 20 cm apart from one another. Each pair of RFID tags is at the end of one of the ranges R1-R3. Tags 24a and 24b are at the lower end of range R1. Tags 24c and 24d are located at the upper end of range R2, while tags 24e and 24f are located at the lower end of range R2. Tags 24g and 24h are located at the upper end of range R3.
  • RFID reader 22 detects the two tags one-by-one. Based on the order in which the two RFID tags are read, RFID reader 22 is able to determine whether cab 12 is entering or leaving a range. Whenever cab 12 is entering one of the ranges R1-R3, RFID reader22 broadcasts a message through an RF transmitter associated with RFID reader 22. The message transmitted identifies the hoistway HW1-HWN and the range R1-R3 that cab 12 is entering.
  • RFID tags 24a-24h are simple. RFID , tags 24a-24h can be glued to the wall of each hoistway. RFID reader 22 and tags 24a-24h do not need any fine tuning in positioning.
  • RFID tags 24a-24h and RFID reader 22 can also be used for otherfunctionsof elevator system 10.
  • RFID tags 24a, 24b, 24g, and 24h and RFID reader 22 can be used alone or in conjunction with additional RFID tags to provide signals used for a normal terminal slowdown device (NTSD) feature and an emergency terminal stopping device (ETSD) feature of elevator system 10. These features are used to stop movement of car 12 when it reaches stopping zones near the top and bottom ends of the hoistway.
  • NTSD normal terminal slowdown device
  • ETSD emergency terminal stopping device
  • the time difference between readings by reader 22 of RFID tags 24a-24h can be used for speed measurement as part of an emergency terminal speed limiting device (ETSLD) feature of elevator system 10.
  • ETSLD emergency terminal speed limiting device
  • Sensing of mechanic position is performed by ultrasonic motion detection using a pair of ultrasonic transceivers for each hoistway.
  • Cab ultrasonic transceiver 26 is carried on the top of cab 12 and defines cab top sensing zone 28 above cab 12.
  • Pit ultrasonic transceiver 30 is positioned within the pit area (range R3) of each hoistway HW 1 -HWN, and produces an associated pit sensing zone 32.
  • Ultrasonic transceivers 26 and 30 send out ultrasonic pulses to detect any moving objects within their respective sensing zones 28 and 32. By controlling signal strength and frequency of the ultrasonic pulses from transceivers 26 and 30, the detection zones 28 and 32 can be confined to within the associated hoistway, as illustrated in hoistway HW1 in FIG. 1.
  • ultrasonic transceiver 26 or 30 Once ultrasonic transceiver 26 or 30 detects a moving object, it begins sending out a coded message as part of the ultrasonic pulses. This coded signal identifies the transceiver 26 or 30 by hoistway and location.
  • FIG. 2 shows one example of a coded ultrasonic signal, which includes synchronization pulses 32, start code 34, identification code 36 for the ultrasonic transceiver producing the signal, and stop code 38.
  • Transceivers 26 and 30 can continue to detect a moving object even though the ultrasonic signal being generated is in a coded form. If transceiver 26 or 30 cannot detect a moving object, it stops sending out the code, and continues to send out nominal ultrasonic pulses until a moving object is once again sensed. This minimizes ultrasonic interference among the ultrasonic transceivers in the hoistways.
  • FIG. 3 shows portable warning device 40, which uses cab position information broadcast by RFID readers 22 and mechanic position information received from a nearby ultrasonic transceiver 26 (in the form of the coded ultrasonic signal) to determine whether a voice-based warning should be provided to the mechanic.
  • Portable device 40 is a headset including RF receiver 42, ultrasonic receiver 44, battery-powered warning circuitry 46, and speaker 48.
  • RF receiver 42 provides cab position information received from RFID readers 22 carried on cabs 12. The information received indicates the hoistway and the range for the associated cab 12.
  • Ultrasonic receiver 44 receives any incoming ultrasonic pulses, synchronizes itself with the incoming signal, and extracts the unique identification number of the ultrasonic transceiver 26 or 30 producing the detected ultrasound. Once the identification number of ultrasonic transceiver 26 or 30 is known, the position of the mechanic carrying ultrasonic receiver 44 is known to warning device 40.
  • circuitry 46 Based upon the unique number of the adjacent ultrasonic transceiver 26 or 30 and the range and hoistway information received from the RF transmitter, circuitry 46 knows whether it needs to send out a voice-based warning message through headphone/speaker 48. Circuitry 46 includes logic for determining the need for a voice message based upon cab position and mechanic position, and speech synthesizer circuitry for generating the warning message.
  • FIG.4 is a chart showing when warning device 40 generates a voice- based warning message based upon cab position and mechanic position.
  • An "X" in the boxes corresponding to a particular cab position (hoistway and range) and a particular mechanic position (hoistway and cab top or pit) indicates that a voice-based warning is generated.
  • warning device 40 produces a warning not only based upon location of cab 12 in the same hoistway as the mechanic, but also takes into account position of cabs in adjacent hoistways. For example, if the mechanic is on top of cab 12 in hoistway HW2, a voice-based warning message is generated only when cab 12 enters either range R1 or R2 of hoistway HW2. However, if the mechanic is in the pit of hoistway HW2, a voice-based warning message is generated when the cabs in hoistways HW1 , HW2 and HW3 enter either range R1 or range R3.
  • the adjacent hoistways are considered since the mechanic can be injured by an adjacent cab or counterweight while the mechanic is working within the pit area.
  • warning device 40 has been shown as a headset, it can take other forms as well.
  • warning device 40 can be incorporated into a safety helmet. It can also accommodate or be incorporated into ordinary radio communication devices used by mechanics performing elevator repair.
  • the safety system of the present invention provides enhanced mechanic safety on an automated basis.
  • the mechanic is warned of potential hazards not only from activity within the particular hoistway in which the mechanic is working, but also adjacent hoistways.
  • the warning messages are specific to a particular mechanic, rather than being broadcast to all workers within the elevator system. Thus, when a warning is received, the mechanic knows that it is intended specifically for him or her.
  • the warning system has very low material cost in terms of the RFI D cab position sensing and the ultrasonic mechanic position sensing.
  • the battery powered portable device is relatively low in complexity, and can be incorporated into existing radio communication devices used by mechanics.
  • Installation cost of the warning system is also low, since RFID tags and the pit area ultrasonic transceivers can be attached to walls, and installation location accuracy is at the centimeter level, rather than higher precision.
  • Maintenance cost is low, since the components in the hoistway do not typically require maintenance.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)

Abstract

La présente invention concerne un système d'avertissement pour les techniciens travaillant dans des gaines d'ascenseurs (HW1, HW2, HW3, HWN) qui détecte la position de la cabine d'ascenseur dans la gaine et détecte la présence d'un technicien sur le dessus d'une cabine d'ascenseur (12) ou dans le puits à la base de la gaine. Un technicien dont la présence a été détectée recevra un avertissement de danger imminent en fonction de la position de la cabine (12) dans la gaine (HW1, HW2, HW3, HWN), ainsi que la position des cabines dans les gaines adjacentes, de sorte que le technicien puisse remarquer l'approche d'un danger imminent représenté par une cabine en mouvement (12) ou un contrepoids (16).
PCT/US2005/028153 2005-08-08 2005-08-08 Systeme d'avertissement pour les techniciens travaillant dans des gaines d'ascenseurs WO2007018540A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2005/028153 WO2007018540A1 (fr) 2005-08-08 2005-08-08 Systeme d'avertissement pour les techniciens travaillant dans des gaines d'ascenseurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2005/028153 WO2007018540A1 (fr) 2005-08-08 2005-08-08 Systeme d'avertissement pour les techniciens travaillant dans des gaines d'ascenseurs

Publications (1)

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WO2007018540A1 true WO2007018540A1 (fr) 2007-02-15

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9359171B1 (en) 2015-01-20 2016-06-07 Inventio Ag Safety system for a lift installation and safety helmet as individual component of such a safety system
EP3170780A1 (fr) * 2015-11-17 2017-05-24 Otis Elevator Company Système d'alerte de mouvement d'ascenseur
US10462638B2 (en) 2017-06-20 2019-10-29 Otis Elevator Company Lone worker fall detection
CN110569934A (zh) * 2019-09-03 2019-12-13 菱电电梯有限公司 一种电梯底坑进水监测方法
US10526168B2 (en) 2015-10-22 2020-01-07 Otis Elevator Company Service alarm device for warning if an elevator safety device is not activated
US10800635B2 (en) 2017-08-30 2020-10-13 Otis Elevator Company Elevator door wedge monitoring system
US10906776B2 (en) 2017-08-30 2021-02-02 Otis Elevator Company Work area technician warning system
US11053095B2 (en) 2018-05-02 2021-07-06 Otis Elevator Company Elevator alert system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4897630A (en) * 1987-01-21 1990-01-30 Electronic Security Products Of California, Inc. Programmable alarm system having proximity detection with vocal alarm and reporting features
US4987402A (en) * 1987-01-21 1991-01-22 Electronic Security Products Of California Alarm system for sensing and vocally warning of an unauthorized approach towards a protected object or zone
US5283400A (en) * 1990-01-09 1994-02-01 Toc Holding Company Of New York, Inc. Elevator shaftway intrusion device
US5347094A (en) * 1990-01-09 1994-09-13 Toc Holding Copmany Of New York, Inc. Elevator shaftway intrusion device
US5476157A (en) * 1994-06-03 1995-12-19 Todaro; Sam S. Elevator control system with elevator hoistway operation monitoring system and method
US6116381A (en) * 1999-03-23 2000-09-12 Otis Elevator Company Passive hall fixtures mounted in elevator doors
US6173814B1 (en) * 1999-03-04 2001-01-16 Otis Elevator Company Electronic safety system for elevators having a dual redundant safety bus
US6202797B1 (en) * 1999-08-26 2001-03-20 Otis Elevator Company Automatic protection of elevator mechanics
US6603398B2 (en) * 2001-11-16 2003-08-05 Otis Elevator Company Hoistway access detection system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4897630A (en) * 1987-01-21 1990-01-30 Electronic Security Products Of California, Inc. Programmable alarm system having proximity detection with vocal alarm and reporting features
US4987402A (en) * 1987-01-21 1991-01-22 Electronic Security Products Of California Alarm system for sensing and vocally warning of an unauthorized approach towards a protected object or zone
US5283400A (en) * 1990-01-09 1994-02-01 Toc Holding Company Of New York, Inc. Elevator shaftway intrusion device
US5347094A (en) * 1990-01-09 1994-09-13 Toc Holding Copmany Of New York, Inc. Elevator shaftway intrusion device
US5476157A (en) * 1994-06-03 1995-12-19 Todaro; Sam S. Elevator control system with elevator hoistway operation monitoring system and method
US6173814B1 (en) * 1999-03-04 2001-01-16 Otis Elevator Company Electronic safety system for elevators having a dual redundant safety bus
US6116381A (en) * 1999-03-23 2000-09-12 Otis Elevator Company Passive hall fixtures mounted in elevator doors
US6202797B1 (en) * 1999-08-26 2001-03-20 Otis Elevator Company Automatic protection of elevator mechanics
US6603398B2 (en) * 2001-11-16 2003-08-05 Otis Elevator Company Hoistway access detection system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9359171B1 (en) 2015-01-20 2016-06-07 Inventio Ag Safety system for a lift installation and safety helmet as individual component of such a safety system
US10526168B2 (en) 2015-10-22 2020-01-07 Otis Elevator Company Service alarm device for warning if an elevator safety device is not activated
EP3170780A1 (fr) * 2015-11-17 2017-05-24 Otis Elevator Company Système d'alerte de mouvement d'ascenseur
JP2017088391A (ja) * 2015-11-17 2017-05-25 オーチス エレベータ カンパニーＯｔｉｓ Ｅｌｅｖａｔｏｒ Ｃｏｍｐａｎｙ エレベータかごモーションアラートシステム
CN106995169A (zh) * 2015-11-17 2017-08-01 奥的斯电梯公司 电梯轿厢动作警报系统
US10252882B2 (en) 2015-11-17 2019-04-09 Otis Elevator Company Elevator motion alert system
US10462638B2 (en) 2017-06-20 2019-10-29 Otis Elevator Company Lone worker fall detection
US10800635B2 (en) 2017-08-30 2020-10-13 Otis Elevator Company Elevator door wedge monitoring system
US10906776B2 (en) 2017-08-30 2021-02-02 Otis Elevator Company Work area technician warning system
US11053095B2 (en) 2018-05-02 2021-07-06 Otis Elevator Company Elevator alert system
CN110569934A (zh) * 2019-09-03 2019-12-13 菱电电梯有限公司 一种电梯底坑进水监测方法

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