WO2002002450A1 - Systeme de mesure de la charge integre a un ascenseur - Google Patents

Systeme de mesure de la charge integre a un ascenseur Download PDF

Info

Publication number
WO2002002450A1
WO2002002450A1 PCT/US2001/014454 US0114454W WO0202450A1 WO 2002002450 A1 WO2002002450 A1 WO 2002002450A1 US 0114454 W US0114454 W US 0114454W WO 0202450 A1 WO0202450 A1 WO 0202450A1
Authority
WO
WIPO (PCT)
Prior art keywords
elevator car
force sensor
motor
elevator
hoistway
Prior art date
Application number
PCT/US2001/014454
Other languages
English (en)
Inventor
Hartmut Engler
Michael Thomas Barten
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
Publication of WO2002002450A1 publication Critical patent/WO2002002450A1/fr

Links

Classifications

    • 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
    • B66B1/3476—Load weighing or car passenger counting devices

Definitions

  • This invention pertains to weighing the loading of an elevator car, and in particular to , weighing the loading of an elevator car at the machine.
  • Anti- nuisance software estimates the number of people in a car by assuming an average weight per person. It then determines the number of car calls and if the number of car calls exceeds the number of people estimated, it cancels those car calls.
  • a force sensor integrated into a main bearing of an elevator machine measures the force in the direction of the wire ropes or coated steel belts that support and move an elevator car.
  • the resulting signal provides information on the car weight and on mechanical problems in the hoistway, motor, main bearing, or drive sheave.
  • the signal amplitude is proportional to the weight of the elevator car.
  • the amplitude is independent of the position of the load in the elevator car. In cooperation with the position decoder of the machine, it is possible to differentiate between hoistway and motor problems, or to determine the precise location of the problem if the problem is in the hoistway.
  • an integrated load weighing system for an elevator car includes a motor having a shaft; a drive sheave attached to the shaft via a main bearing; a tension member reeved over the drive sheave and supporting the elevator car; and a force sensor in the main bearing, wherein a force on the main bearing from the tension member detected by the force sensor is proportional to a weight of the elevator car.
  • an integrated load weighing system for an elevator car includes a drive sheave mounted on a first shaft via a first bearing; at least one additional sheave mounted on a second shaft via a second bearing; a tension member reeved over the drive sheave and the additional sheave, the tension member supporting the elevator car; and a force sensor in at least one of the first and second bearings, wherein a force on at least one of the first and second bearings from the tension member detected by the force sensor is proportional to a weight of the elevator car.
  • Fig. 1 shows a machine for an elevator system.
  • Fig. 2 shows a schematic illustrating the principle of the invention.
  • Fig. 3 shows an integrated force sensor according to an embodiment of the invention.
  • Fig. 4 shows a schematic illustrating the damper spring equivalent of the elevator system of the present invention.
  • Fig. 5 A shows an output from the force sensor of the present invention under normal operating conditions.
  • Fig. 5B shows an output from the force sensor of the present invention due to a deformed sheave or motor.
  • Fig. 5C shows an output from the force sensor of the present invention due to a damaged bearing.
  • Fig. 5D shows an output from the force sensor of the present invention due to a damaged elevator car guide rail.
  • Fig. 5E shows an output from the force sensor of the present invention due to a damaged motor or closed loop controller.
  • Fig. 6 shows a schematic illustrating an alternate suspension arrangement for an elevator car using an embodiment of the invention.
  • a machine 10 includes a motor 12 which drives a shaft 20.
  • a drive sheave 14 and a brake 16 are attached to shaft 20.
  • Machine 10 is typically attached to a bed plate 18 which is in turn mounted in a machine room over an elevator hoistway.
  • a tension member 15 such as a wire rope (cable) or coated steel belt (CSB) is reeved.over drive sheave 14 to an elevator car 22 and a counterweight 24.
  • a bearing 26 connects drive sheave 14 to shaft 20.
  • Bearing 26 preferably includes a force sensor 28 such as a resistance strain gauge or a piezoelectric force gauge which senses the load imposed on bearing 26 by tension member 15.
  • Force sensor 28 outputs a signal whose magnitude is proportional to the load imposed by tension member 15, which includes the load from elevator car 22 and counterweight 24, and is independent of the location of the load in elevator car 22. The frequency of the signal is proportional to the speed of motor 12.
  • Fig. 4 which shows the damper-spring equivalent of the system of Fig. 2, is used to predict the signals output by force sensor 28 in the event of a change.
  • the signal output from force sensor 28 is shown changing as the car load changes. This signal is indicative of normal operation as people get on and off the elevator.
  • a deformed sheave 14, damaged motor 12, or damaged closed loop controller for motor 12 will excite the spring damper system of Fig. 4, resulting in the signal of Fig. 5B.
  • the oscillation period equals the rotor speed of motor 12.
  • a damaged ball bearing 26 causes a spike in the signal with a periodic magnitude linked to the specific rotor position of motor 12.
  • a bad guiding rail adjustment for the rails in the elevator hoistway that guides elevator car 22 causes a signal that is linked to a specific position of elevator car 22 within the hoistway.
  • the signal shown represents torque ripple caused by a damaged motor 12 or damaged close loop controller.
  • FIG. 6 shows an overslung arrangement, an underslung arrangement, where the elevator sheaves are connected to an underside of elevator car 22, also works with the present invention.
  • the machine (motor and drive sheave combination) can be located on or under the elevator car.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Elevator Control (AREA)

Abstract

L'invention concerne un détecteur de forces intégré à un palier principal d'un ascenseur, qui mesure la force dans la direction des câbles métalliques ou des courroies d'acier revêtues qui supportent et déplacent une cabine d'ascenseur. Le signal obtenu fournit des informations relatives au poids de la cabine et à des problèmes mécaniques dans le puits, le moteur, le palier principal ou la poulie motrice. L'amplitude de signal est proportionnelle au poids de la cabine d'ascenseur. Elle est indépendante de la position de la charge dans la cabine d'ascenseur. En coopération avec le décodeur de position de la machine, il est possible de distinguer les problèmes du puits et du moteur, ou de déterminer l'emplacement précis du problème si celui-ci se situe au niveau du puits.
PCT/US2001/014454 2000-06-29 2001-05-03 Systeme de mesure de la charge integre a un ascenseur WO2002002450A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US60650700A 2000-06-29 2000-06-29
US09/606,507 2000-06-29

Publications (1)

Publication Number Publication Date
WO2002002450A1 true WO2002002450A1 (fr) 2002-01-10

Family

ID=24428252

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/014454 WO2002002450A1 (fr) 2000-06-29 2001-05-03 Systeme de mesure de la charge integre a un ascenseur

Country Status (2)

Country Link
TW (1) TW593114B (fr)
WO (1) WO2002002450A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2459759C2 (ru) * 2007-05-03 2012-08-27 Инвенцио Аг Подъемник с кабиной, блок направляющих шкивов для подъемника и способ размещения в подъемнике датчика для взвешивания груза
EP2520534A1 (fr) * 2011-05-02 2012-11-07 Hoffmann Foerdertechnik GmbH Dispositif de détection de charge sur des engins de levage et engins à chaînes électriques
WO2016173823A1 (fr) * 2015-04-28 2016-11-03 Thyssenkrupp Elevator Ag Dispositif de mesure de charges d'arbre dans un système d'ascenseur
WO2019115513A3 (fr) * 2017-12-11 2019-08-29 Otto Bock Healthcare Products Gmbh Dispositif de mesure de force linéaire et actionneur hydraulique
EP3816082A1 (fr) * 2019-10-28 2021-05-05 Otis Elevator Company Système et procédé de surveillance de l'état d'un palier de poulie

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015468A (en) * 1974-07-12 1977-04-05 Francois Simon Device for the measurement of the radial force sustained by a rotary organ
JPH01133881A (ja) * 1987-11-18 1989-05-25 Mitsubishi Electric Corp エレベータの荷重検出装置
US5140849A (en) * 1990-07-30 1992-08-25 Agency Of Industrial Science And Technology Rolling bearing with a sensor unit
FR2736979A1 (fr) * 1995-07-21 1997-01-24 Roulements Soc Nouvelle Dispositif et procede detecteur dynamometrique pour roulements et paliers
JPH09240942A (ja) * 1996-03-08 1997-09-16 Toshiba Elevator Eng Kk エレベータ装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015468A (en) * 1974-07-12 1977-04-05 Francois Simon Device for the measurement of the radial force sustained by a rotary organ
JPH01133881A (ja) * 1987-11-18 1989-05-25 Mitsubishi Electric Corp エレベータの荷重検出装置
US5140849A (en) * 1990-07-30 1992-08-25 Agency Of Industrial Science And Technology Rolling bearing with a sensor unit
FR2736979A1 (fr) * 1995-07-21 1997-01-24 Roulements Soc Nouvelle Dispositif et procede detecteur dynamometrique pour roulements et paliers
JPH09240942A (ja) * 1996-03-08 1997-09-16 Toshiba Elevator Eng Kk エレベータ装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 380 (M - 863) 23 August 1989 (1989-08-23) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 01 30 January 1998 (1998-01-30) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2459759C2 (ru) * 2007-05-03 2012-08-27 Инвенцио Аг Подъемник с кабиной, блок направляющих шкивов для подъемника и способ размещения в подъемнике датчика для взвешивания груза
EP2520534A1 (fr) * 2011-05-02 2012-11-07 Hoffmann Foerdertechnik GmbH Dispositif de détection de charge sur des engins de levage et engins à chaînes électriques
WO2016173823A1 (fr) * 2015-04-28 2016-11-03 Thyssenkrupp Elevator Ag Dispositif de mesure de charges d'arbre dans un système d'ascenseur
WO2019115513A3 (fr) * 2017-12-11 2019-08-29 Otto Bock Healthcare Products Gmbh Dispositif de mesure de force linéaire et actionneur hydraulique
US11872145B2 (en) 2017-12-11 2024-01-16 Otto Bock Healthcare Products Gmbh Linear force-measuring device and hydraulic actuator
EP3816082A1 (fr) * 2019-10-28 2021-05-05 Otis Elevator Company Système et procédé de surveillance de l'état d'un palier de poulie

Also Published As

Publication number Publication date
TW593114B (en) 2004-06-21

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