EP0137102A1 - Dispositif de commande de l'instant du début du freinage d'ascenseurs - Google Patents

Dispositif de commande de l'instant du début du freinage d'ascenseurs Download PDF

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Publication number
EP0137102A1
EP0137102A1 EP84106267A EP84106267A EP0137102A1 EP 0137102 A1 EP0137102 A1 EP 0137102A1 EP 84106267 A EP84106267 A EP 84106267A EP 84106267 A EP84106267 A EP 84106267A EP 0137102 A1 EP0137102 A1 EP 0137102A1
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EP
European Patent Office
Prior art keywords
distance
braking
floor
travel
target
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.)
Granted
Application number
EP84106267A
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German (de)
English (en)
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EP0137102B1 (fr
Inventor
Paul Friedli
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.)
Inventio AG
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Inventio AG
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Publication date
Application filed by Inventio AG filed Critical Inventio AG
Priority to AT84106267T priority Critical patent/ATE21679T1/de
Publication of EP0137102A1 publication Critical patent/EP0137102A1/fr
Application granted granted Critical
Publication of EP0137102B1 publication Critical patent/EP0137102B1/fr
Expired legal-status Critical Current

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    • 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
    • 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
    • B66B1/36—Means for stopping the cars, cages, or skips at predetermined levels
    • B66B1/44—Means for stopping the cars, cages, or skips at predetermined levels and for taking account of disturbance factors, e.g. variation of load weight

Definitions

  • the invention relates to a device for controlling the brake trigger point in elevators, with markings in the elevator shaft at a certain distance from the floors, which cooperate with a switch which can be actuated when the elevator car drives past, and with a speed measuring device connected to the lifting motor, the brake trigger point in It can be determined as a function of the speed measured when the elevator car drives past the marking of the destination floor, and stopping errors from previous journeys are taken into account when determining the brake release point.
  • the nominal travel speed can also be reached while driving through the smallest floor distance.
  • the braking phase begins when the elevator car drives past a mark made in the elevator shaft, for example in the form of a magnet, is introduced, the markings always being arranged at the same distance from the floors.
  • This type of brake initiation leads to inaccuracies in stopping, which are mainly caused by the changing load moments with the cabin load and therefore also the driving speed.
  • a control device has become known, by means of which the inaccuracies resulting from the reasons mentioned above are to be avoided.
  • a voltage which is proportional to the travel speed of the elevator car is generated by means of a tachometer dynamo and is switched against a reference voltage via a relay and a switch which can be actuated by the elevator car.
  • the reference voltage generated by a stabilized voltage source is greater than the greatest tacho voltage that occurs.
  • a capacitor and resistors are connected to the stabilized voltage source in such a way that the capacitor voltage is equal to the reference voltage when the switch is closed. Markings are arranged in the elevator shaft for each direction of travel at a certain distance from the floors.
  • control contacts are arranged on the elevator car by means of which stopping errors can be detected.
  • a step-by-step mechanism can be actuated, which is designed in such a way that it can adjust a resistor arranged in the brake circuit in proportion to the size of the stopping error.
  • the stopping error stored in this way now has an effect on the next trip in such a way that a more or less large current flows in the braking circuit, as a result of which a new stopping error is to be avoided.
  • the brake triggering time is calculated by means of a microprocessor as a function of the speed, the equation on which it is based only provides approximate results.
  • the object underlying the invention is to further improve the holding accuracy in lifts of the type mentioned.
  • the invention proposes, with the features characterized in the patent claims, to record the shaft marking - floor level fluctuating distances due to building tolerances from floor to floor and to specify them as target paths for a path-dependent determination of the brake release point, the brake release point is determined from the difference between the respective target travel and a braking distance derived from experience.
  • the advantage achieved with the invention can be seen in particular in the fact that the stopping accuracy is significantly increased by the precise detection of the distances between the shaft marking and the floor level and the path-dependent determination of the braking trigger point.
  • the stopping accuracy is further improved by generating, storing and storing correction values for floors with different friction conditions and taking them into account when calculating the brake trigger point.
  • Another advantage is that the device according to the invention can be retrofitted into already existing elevator systems of various types without having to carry out complex adjustment and adjustment work on the existing installations.
  • 1 denotes the lifting motor of an elevator, which drives a elevator car 6 suspended on a conveyor cable 4 and balanced by means of a counterweight 5 via a gear 2 and a traction sheave 3.
  • the lifting motor for example an asynchronous motor, is coupled to a flywheel 7 and the brake drum 8 of an electromechanical holding brake and is connected to a three-phase network RST via contacts 9, 10 of directional protection devices 11, 12 and contacts 13 of a main switch.
  • the control of the direction of travel contactors 11, 12 is assumed to be known and is therefore not further shown and described.
  • the elevator car 6 is guided in an elevator shaft 14 which, for example, extends over May extend twelve floors E1-E12, and in which four marks in the form of magnets M1-M4 are arranged at a certain distance from the floors.
  • a bistable magnetic switch 15 is fastened to the elevator car 6, which is actuated when the elevator car 6 drives past the magnets M1-M4 and is electrically connected to an input of a control device 16 described in more detail below.
  • Floor relays SP1-SP12 are assigned to floors E1-E12, which can be controlled by means of floor call transmitters DE1-DE12 provided on floors E1-E12 and car call transmitters (not shown) arranged in elevator car 6.
  • SK1-SK12 self-holding contacts are designated, via which the floor relays SP1-SP12 keep voltage after entering calls.
  • the self-holding contacts SK1-SK12 are connected to a conductor 17, via which the storey relays SP1-SP12 are switched off in a known manner after the execution of a travel command by means of switching elements (not shown).
  • the floor relays SP1-SP12 are connected to further inputs of the control unit 16 in order to query their memory status.
  • a solenoid of the electromechanical holding brake is designated, which via the contact 20 of a brake while the elevator car 6 is traveling relay 19 is connected to a voltage source, not shown.
  • the brake relay 19 is connected on the one hand to a pole of the voltage source and on the other hand to an output of the control unit 16 and to a control relay 21.
  • the directional contactors 11, 12 can be controlled via a contact 22 of the control relay 21 in such a way that the lifting motor 1 is switched off when the brake is applied.
  • a brake contact 23 which can be actuated by the holding brake and is closed when the elevator car 6 is at a standstill is connected to a further input of the control unit 16.
  • the floor call transmitters DE1-DE12 are connected to the voltage source via another brake contact 24, which is also only closed when the vehicle is at a standstill.
  • a contact 25 of a directional contactor 11 is connected to a further input of the control unit 16 for the purpose of reporting the direction of travel.
  • a pulse generator 26 consists of a reflective film 27 attached to the flywheel 7 and a reflective light barrier 28 which is connected to a further input of the control device 16.
  • the reflective film 27 has reflective and non-reflective zones, the zones being distributed around the circumference of the flywheel 7 in such a way that one impulse per driving corresponds to the elevator car 6 of, for example, 2 mm.
  • the control unit 16 consists of a distance table RAM1, a braking distance table RAM2, a floor correction table RAM3, a selector C1 indicating the respective cabin position, a floor register C2 indicating a target floor, a path counter C3, a speed register C4, a computer RE and a comparator KO.
  • Distance, braking distance and floor correction table RAM1, RAM2, RAM3 are read-write memories, while the selector C1, the floor and speed registers C2, C4 and the travel counter C3 are registers of a microprocessor CPU, the arithmetic unit of which functions the computer RE and Comparator KO executes.
  • the read-write memories RAM1, RAM2, RAM3, the microprocessor CPU, a read-only memory EPROM and an interface circuit IF are connected to one another via a bus B consisting of data, address and control lines and, together with a clock generator T, form a microcomputer.
  • the interface circuit IF can, for example, consist of a multiplexer for the data input from the floor relays SP1-SP12 and for the input and output of the remaining data from bus drivers which are activated with the aid of an address decoder.
  • the one with the brake and control relay 19, 21 connected output of the control device 16 is connected via a switch 29, for example in the form of a transistor switch, to the corresponding output of the interface circuit IF.
  • the distances between the magnets M1-M4 of each floor are stored in the distance table RAM1, the distances in the downward travel direction of the elevator car 6 being designated by first, second and third distances D1, D2, D3 (FIG. 2), and for example the first and the third distance D1, D3 may each be 40 cm and the second distance D2 20 cm.
  • the magnets M1-M4 are arranged in the elevator shaft 14 in such a way that when the elevator car 6 is flush with one floor, the magnetic switches 15 are located exactly in the middle of the second distance D2 (point III, FIG. 2).
  • the value of the third distance D3 is determined and stored during the fourth signal change and the counter reading is then deleted.
  • the selector C1 is switched to the number of the next floor. If the vehicle drives past the same floor repeatedly, the existing values are compared with the newly determined values and corrected in the event of deviations. In addition, an average value DO assigned to all floors is formed and stored from the values of the distances D1 and D3 of the floors already traveled.
  • braking distances S Br and the speeds associated with them are stored for each direction of travel.
  • the braking distance table RAM2 is formed when braking for the first time, with further value pairs being formed based on the braking distance that has occurred and the assigned speed. This is done in such a way that in a range of, for example, 75-125% of the measured speed with increasing speed, braking distances derived from the first measured braking distance are determined and stored. After further journeys, these braking distances S Br are compared with the braking distances that have actually occurred and are corrected appropriately in the event of deviations.
  • the frictional relationships may not be the same across the entire elevator shaft 14, it can happen that at a certain speed the braking distance actually occurring is not the same on all floors. This can lead to the fact that an exact table value of the braking distance table RAM2 that has already been corrected several times on floors with different friction is falsified. As a result, the stopping accuracy on the other floors deteriorates again, so that the corrections would have to be carried out again.
  • the braking distance S Br stored in the braking distance table RAM2 is supplemented by a correction value K St stored in the floor correction table RAM3 and dependent on the direction of travel.
  • the correction value K St is formed in such a way that, depending on whether the braking distance error on a floor with a different friction is positive or negative, the correction value K St is increased or decreased by a travel pulse, but does not exceed a maximum size.
  • the distances D1, D2, DO are called up from the distance table RAM1 and the correction value K St from the floor correction table RAM3 at an address which is assigned to the floor number contained in the selector C1, and taking into account the travel direction queried at the corresponding input of the control unit 16.
  • the braking distance S Br is called from the braking distance table RAM2 at an address which is dependent on the speed stored in the speed register C4 and the direction of travel.
  • the Bremsein effetswe g S Einl is stored and the input of the control device 16 connected to the magnetic switch 15 is activated.
  • the travel counter C3 is incremented depending on the pulses generated by the pulse generator 26.
  • the distance counter reading is now continuously compared with the brake initiation distance S Einl . If the paths and a stop determination are identical, which is given, for example, by the same floor numbers in the selector C1 and the destination floor register C2, the output of the control unit 16 connected to the transistor switch 29 is activated such that the brake relay 19 and the control relay 21 drop out, the braking process triggered and the engine is switched off (point II, Fig. 2).
  • the now closing brake contact 23 signals the brake application via the assigned input to the control unit 16, as a result of which the floor number contained in the destination floor register C2 is deleted.
  • the speed counter is zero
  • the distance counter is read and the actual braking distance is determined by subtracting the braking initiation path S Einl . Then, as already described above, the correction of the braking distance ta belle RAM2.
  • v d denotes a speed curve at full load downward and v such a curve at full load upward.
  • the brake is triggered at time t 0 and begins to react at time t 1 .
  • the path difference s resulting in the assumed extreme cases corresponds to the maximum stopping difference that occurs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Elevator Control (AREA)
  • Vehicle Body Suspensions (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Braking Arrangements (AREA)
  • Control And Safety Of Cranes (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Warehouses Or Storage Devices (AREA)
EP84106267A 1983-08-23 1984-06-01 Dispositif de commande de l'instant du début du freinage d'ascenseurs Expired EP0137102B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84106267T ATE21679T1 (de) 1983-08-23 1984-06-01 Einrichtung zur steuerung des bremsausloesepunktes bei aufzuegen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4592/83 1983-08-23
CH4592/83A CH660586A5 (de) 1983-08-23 1983-08-23 Einrichtung zur steuerung des bremsausloesepunktes bei aufzuegen.

Publications (2)

Publication Number Publication Date
EP0137102A1 true EP0137102A1 (fr) 1985-04-17
EP0137102B1 EP0137102B1 (fr) 1986-08-27

Family

ID=4278962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84106267A Expired EP0137102B1 (fr) 1983-08-23 1984-06-01 Dispositif de commande de l'instant du début du freinage d'ascenseurs

Country Status (7)

Country Link
EP (1) EP0137102B1 (fr)
AT (1) ATE21679T1 (fr)
CH (1) CH660586A5 (fr)
DE (1) DE3460558D1 (fr)
ES (1) ES8505310A1 (fr)
FI (1) FI74684C (fr)
HU (1) HU189120B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0297232A1 (fr) * 1987-06-30 1989-01-04 Inventio Ag Valeur réelle transmetteur pour circuit de réglage de position de système élévateur
DE102009049267A1 (de) * 2009-10-13 2011-04-21 K-Solutions Gmbh Verfahren zur Steuerung eines Aufzugs und einer Aufzugsgruppe
US20170174472A1 (en) * 2014-02-06 2017-06-22 Otis Elevator Company Brake operation management in elevators

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1500005A (fr) * 1966-06-02 1967-11-03 Sélecteur pour ascenseur, monte-malade, monte-charge, etc.
US3425515A (en) * 1964-06-15 1969-02-04 Gen Electric Digital control for mine hoist system
FR2145035A5 (fr) * 1971-07-07 1973-02-16 Telemecanique Electrique
FR2349168A1 (fr) * 1976-04-20 1977-11-18 Maschf Augsburg Nuernberg Ag Dispositif permettant d'etablir des points de commutation electrique pour organes d'arret equipant notamment des installations de transport
US4134476A (en) * 1977-10-26 1979-01-16 Westinghouse Electric Corp. Elevator system
US4256203A (en) * 1978-12-18 1981-03-17 Otis Elevator Company Self-adjusting elevator leveling apparatus and method
GB2061559A (en) * 1979-10-18 1981-05-13 Elevator Gmbh Procedure for stopping a means moving along a controlled path such as a lift car
GB2071358A (en) * 1980-02-22 1981-09-16 Hitachi Ltd Method of and system for lift control
DE3030793A1 (de) * 1980-08-14 1982-03-11 Otis Elevator Co., Hartford, Conn. Aufzuganlage und verfahren zur betriebssteuerung derselben

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425515A (en) * 1964-06-15 1969-02-04 Gen Electric Digital control for mine hoist system
FR1500005A (fr) * 1966-06-02 1967-11-03 Sélecteur pour ascenseur, monte-malade, monte-charge, etc.
FR2145035A5 (fr) * 1971-07-07 1973-02-16 Telemecanique Electrique
FR2349168A1 (fr) * 1976-04-20 1977-11-18 Maschf Augsburg Nuernberg Ag Dispositif permettant d'etablir des points de commutation electrique pour organes d'arret equipant notamment des installations de transport
US4134476A (en) * 1977-10-26 1979-01-16 Westinghouse Electric Corp. Elevator system
US4256203A (en) * 1978-12-18 1981-03-17 Otis Elevator Company Self-adjusting elevator leveling apparatus and method
GB2061559A (en) * 1979-10-18 1981-05-13 Elevator Gmbh Procedure for stopping a means moving along a controlled path such as a lift car
GB2071358A (en) * 1980-02-22 1981-09-16 Hitachi Ltd Method of and system for lift control
DE3030793A1 (de) * 1980-08-14 1982-03-11 Otis Elevator Co., Hartford, Conn. Aufzuganlage und verfahren zur betriebssteuerung derselben

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0297232A1 (fr) * 1987-06-30 1989-01-04 Inventio Ag Valeur réelle transmetteur pour circuit de réglage de position de système élévateur
DE102009049267A1 (de) * 2009-10-13 2011-04-21 K-Solutions Gmbh Verfahren zur Steuerung eines Aufzugs und einer Aufzugsgruppe
US20170174472A1 (en) * 2014-02-06 2017-06-22 Otis Elevator Company Brake operation management in elevators
US10252879B2 (en) * 2014-02-06 2019-04-09 Otis Elevator Company Brake operation management in elevators
US10538412B2 (en) 2014-02-06 2020-01-21 Otis Elevator Company Brake operation management in elevators

Also Published As

Publication number Publication date
HUT35211A (en) 1985-06-28
ES534468A0 (es) 1985-05-16
FI74684B (fi) 1987-11-30
EP0137102B1 (fr) 1986-08-27
CH660586A5 (de) 1987-05-15
ATE21679T1 (de) 1986-09-15
DE3460558D1 (en) 1986-10-02
FI843254A (fi) 1985-02-24
FI74684C (fi) 1988-03-10
ES8505310A1 (es) 1985-05-16
FI843254A0 (fi) 1984-08-17
HU189120B (en) 1986-06-30

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