EP0483560B1 - Barrage photoéléctrique à fourche aux deux canaux dans un modèle du type Failsafe - Google Patents

Barrage photoéléctrique à fourche aux deux canaux dans un modèle du type Failsafe Download PDF

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Publication number
EP0483560B1
EP0483560B1 EP91117175A EP91117175A EP0483560B1 EP 0483560 B1 EP0483560 B1 EP 0483560B1 EP 91117175 A EP91117175 A EP 91117175A EP 91117175 A EP91117175 A EP 91117175A EP 0483560 B1 EP0483560 B1 EP 0483560B1
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EP
European Patent Office
Prior art keywords
light barrier
fail
time
circuit
safe light
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.)
Expired - Lifetime
Application number
EP91117175A
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German (de)
English (en)
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EP0483560A1 (fr
Inventor
Rainer Schön
Martin Kirchner
Bernhard Sprecher
Daniel Wildisen
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Inventio AG
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Inventio AG
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    • 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
    • B66B13/24—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers
    • B66B13/26—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers between closing doors

Definitions

  • the present invention relates to a two-channel fork light barrier in "failsafe" design, which is attached to an elevator car and which generates a corresponding shaft information when a switch flag attached to the elevator shaft, which defines the door zone, is inserted into the slot of the fork light barrier in order to initiate the premature opening and bridging of the door door contacts that open before the end of the journey.
  • failsafe assemblies Assemblies that meet these relevant safety regulations are known as failsafe assemblies.
  • apparatus circuits are designed to be fail-safe in that an error or a combination of errors for the device to be controlled, in this case an elevator, cannot cause a dangerous state.
  • European patent application No. 0 357 888 describes a method and a device for generating shaft information for elevators by means of a safety light barrier. Circuit-internal test circuits monitor statically in the idle position and dynamically while the elevator is moving when the light barrier is inserted and removed into the bezw. from the actuating lugs in the shaft their correct function and in the event of an error emit appropriate error signals.
  • U.S. Patent No. 3,743,056 describes a failsafe detector which has a fail-safe circuit and is in particular protected against extraneous light and reflections.
  • the present invention has for its object to provide a failsafe light barrier whose operational safety and readiness is known before each trip of the elevator.
  • Fig.1 all parts of the device and their relationships to each other are shown in a block diagram. 1 with the slot of the fork light barrier is designated, in which the switching flags, not shown, dip in and out while the elevator is moving and thereby interrupt a light beam 11.
  • the switching flags not shown
  • the switching flag present there. 7 denotes an oscillator which controls an IR transmitter diode SDA operated in terms of pulses.
  • a phototransistor T1 converts the light pulses into current pulses, which are then in a receiver and signal amplifier 3 be processed into a strong signal.
  • a measuring point is designated P1A.
  • the signal pulses, clocked with the oscillator signal, are subsequently integrated in an integrator 4 to form a continuous signal which can then be tapped at a measuring point P2A. In this way, non-conforming to the oscillator frequency and any other interference signals are blanked out and eliminated.
  • a subsequent Schmitt trigger 5 is provided in a known manner for a clean switching edge, which can be tracked at a measuring point P3A.
  • the next switching stage with a transistor T2 controls a relay switching stage with a transistor T3 via a cyclically dynamic self-monitoring 6 (hereinafter referred to as ZDU 6).
  • a measuring point P4A is also located on the connection between the transistor and a relay coil A.
  • the relay coil A is connected in the usual way with a back diode and actuates four normally open contacts and two normally closed contacts a1 to a6.
  • the relay coil A is connected via a resistor R1A and a normally closed contact b2 to a supply voltage which comes from a voltage converter and interference filter 9.
  • the relay contacts b1 to b2 are part of relay B in the analog channel B of the failsafe light barrier.
  • the contact combinations a4 / b4, a5 / b5 and a3 / b3 partly present status information and partly parts of the contact safety circuit in the elevator control.
  • an LED 10 is controlled as an optical status control via a resistor R3A.
  • a connection leads back to ZDU 6.
  • an output with a periodic test signal TSA leads to a bridging storey flag 8, which in turn has an input blocking signal SPS and a further input with the oscillator sequence originating from a photodiode HDA.
  • an auxiliary transmitter HSA is operated from the bridging storey flag 8.
  • the light pulses emitted by the transmitter diode SDA also act on the photodiode HDA, the pulse signals of which are continuously applied to the corresponding input of the bridging storey flag 8 and from this when a test pulse TSA arrives or a blocking signal PLC can be passed on to the auxiliary transmitter HSA. Its light pulses then act on the phototransistor T1 (FIG. 1), which completes the process referred to as an optical short circuit.
  • FIG. 2 shows the mutual arrangement of the transmitters SA and SB and the receivers EA and EB in the fork arms 12 and 13 of a fork sensor housing 14.
  • the light beams 11 of the two transmitters SA and SB are directed in opposite directions to one another, so that no stray light from a transmitter in can reach a receiver of the neighboring channel.
  • the signal diagram in FIG. 3 shows the normal function of the failsafe light barrier (hereinafter referred to as the FS light barrier).
  • the first vertical line marked with "in” represents the point in time at which a switching flag in the shaft just interrupts the light beam 11 in the FS light barrier.
  • the second vertical line marked with “off” represents the point in time at which the switching flag in the shaft just emerges from the FS light barrier and releases the light beam 11.
  • the pulsating signal from the transmitter diode SDA is present at measuring point P1A.
  • the switch flag When the switch flag is immersed, the signal suddenly disappears and the integrator 4 (FIG. 1) discharges, which can be seen at the measuring point P2A.
  • P3A After falling below the lower trigger threshold value, P3A becomes zero and subsequently also P4A, whereby relay A is energized and relay A can pick up after a time t. The same thing naturally also happens in channel B with relay B.
  • the two relays A and B have picked up within a predetermined time, the function has run correctly and, if the elevator is entering a destination, the control commands for the premature opening of the door will be given.
  • the principle of simultaneity checking when the relays are activated is described in the application document mentioned for the prior art.
  • the relays A and B remain energized as long as the elevator is on one floor and the light beam 11 through one Switch flag remains interrupted.
  • the pulsating signal at P1A reappears immediately, the integrator 4 charges up, P3A switches to one at the threshold value, P4A also switches and relay A (and B) falls off after a time t.
  • a blocking signal PLC is formed, for example by the control computer, which brings about the optical short-circuit already described (FIG. 1) and thus makes the switching flags for the FS light barrier that are not yet used for a control function virtually invisible.
  • the effect of PLC can be seen in the signal diagram in Fig. 5.
  • the auxiliary transmitter HSA is switched on by bridging the floor flag 8 and the photo transistor T1 is fired with it.
  • the light pulses originate from the SDA transmitter diode and are returned via the HDA photodiode to bypass the floor flag 8, it means no difference to the original signal for the subsequent switching and the relays A and B remain dropped or do not react to a switch flag as long as the blocking signal PLC is active.
  • ZDU cyclical dynamic self-monitoring
  • the term dynamic is used to address the functioning of the monitoring, which is carried out in the same way as an operating function, and the term cyclical is an indication of the periodic repetition of the monitoring function every second. It is about recognizing faulty elements and errors in function at any time.
  • the ZDU 6 essentially consists of a number of interdependent time signal circuits.
  • the time signals and circuits are called t1A, t2A, t3A and t4A for channel A and t1B, t2B, t3B, t4B and tVB for channel B (FIG. 7).
  • 6 shows the details of the relay switching stage with the switching transistor T3 and its control with an OR gate. The inputs of the OR gate form the time signals t1A and t3A.
  • FIG. 7 shows the time signals t1A to t4A or tVB and t1B to t4B, as well as the two OR gates and a flip-flop QFF as blocks with the corresponding connections to one another.
  • the blocks shown are the essential content of block ZDU 6 in the block diagram of FIG. 1.
  • the upper part of the block diagram shows the elements of the A channel and the lower part those of the B channel.
  • QFF is a common element and has a synchronization task.
  • An additional time signal circuit tVB is present in the B channel and has the task of causing a pulse shift in order to form a QFF start signal.
  • the timing of the signals mentioned is shown in the diagram in FIG.
  • the Test signals TSA and TSB, the measuring points P4A / B, the relays A / B, and a JK flip-flop output QFF are listed.
  • the time signal t1A is a bridging signal and is approximately twice as long as t1B.
  • the time signals t2A and t2B are short control signals for QFF and the time signals t3A and t3B are the actual cycle-determining signals.
  • t3A and t3B are started together with the falling edge of QFF, but have a length different by tPV, with t3A ⁇ t3B.
  • t1A which is identical to P3A, becomes one, generates the switching pulse t2A, which in turn makes QFF one.
  • relay A is switched on via P4A, which picks up after a time t.
  • the time signal tVB is first started in channel B and only switched through to relay B after it has elapsed, as a result of which it receives voltage, for example, 2 ms later.
  • the end of the time signal tVB generates the switching pulse t2B which then makes QFF zero again.
  • the falling edge of QFF is now the start signal, synchronizing both channels, for the time signals t3A and t3B.
  • the time signals t3A and t3B are of different lengths, with t3A being shorter than t3B.
  • the time difference corresponds to the test signal delay time tPV in the diagram in FIG. 4.
  • the first test in channel A begins by generating a test signal TSA via t4A and which makes measuring point P4A one during its duration, thus creating a time gap of the same duration for the relay.
  • the time gap in the channel B relay system is made up of the duration of TSB and tVB.
  • the switching pulse t2B QFF becomes zero and the time signals t3A and t3B start again, which starts a new cycle.
  • t1A can run out without effect and is ready for the next same function.
  • the response must be on the safe side, i.e. a relay must drop out and its contacts report the fault to the safety circuits.
  • the periodic inspection of all components records interruptions, short circuits, intermittent failures and drifts. As a first example, assume that the measurement point P3A remains at zero.
  • relay B also picks up. For the time difference in which the two relays pick up one after the other, the antivalence of the outgoing relay contacts is disturbed, with which the error is reported to the control. After a cycle time tz, both relays drop out again because the faulty channel does not carry out the signal change controlled by the ZDU 6.
  • the time signal circuits are implemented by means of RC-connected, generally known monostable CMOS multivibrators, and a likewise known dual J-K flip-flop was used for the flip-flop circuit.
  • the measuring points mentioned in the description only serve to explain the function and in the practical version are not designed as electrical connections.
  • the circuit and mode of operation of the FS light barrier shown can also be used in other areas of technology where fail-safe devices are prescribed, such as for machine tools, trains, alarm and security systems.
  • a corresponding sensor can also be designed as a proximity sensor based on the reflex principle.

Landscapes

  • Indicating And Signalling Devices For Elevators (AREA)
  • Elevator Control (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Electronic Switches (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Liquid Crystal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Magnetic Heads (AREA)
  • Optical Integrated Circuits (AREA)
  • Automatic Disk Changers (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Claims (9)

  1. Barrière lumineuse à fourche à deux canaux à sécurité intrinsèque qui est montée sur une cabine d'ascenseur et qui, lorsqu'un indicateur de commutation monté dans la cage d'ascenseur et définissant la zone de porte entre dans la fente (1) de la barrière lumineuse à fourche, génère une information de cage correspondante en vue de déclencher l'ouverture prématurée de la porte et de court-circuiter avant la fin du trajet les contacts de porte qui s'ouvrent ainsi, caractérisée en ce que la barrière lumineuse à sécurité intrinsèque comporte un circuit d'autocontrôle dynamique cyclique ZDU (6) qui, grâce à un déclenchement périodique de courte durée de la barrière lumineuse, simule le fonctionnement de celle-ci comme lors d'un trajet de l'ascenseur et qui détecte pendant un arrêt à l'étage les défauts de composants électroniques (3, 4, 5, T2) dans ladite barrière lumineuse à sécurité intrinsèque.
  2. Barrière lumineuse à sécurité intrinsèque selon la revendication 1, caractérisée en ce que le circuit d'autocontrôle ZDU (6) comporte des circuits de signaux horaires (t1A..t4A, tVB, t1B..t4B) reliés entre eux qui génèrent des signaux horaires, qui fonctionnent de façon séquentielle et qui commandent le déroulement simulé.
  3. Barrière lumineuse à sécurité intrinsèque selon les revendications 1 et 2, caractérisée en ce que le circuit d'autocontrôle ZDU (6) comporte une bascule (QFF) commune pour les deux canaux, qui déclenche une durée de cycle (tz) par l'intermédiaire de circuits de signaux horaires (t3A, t3B).
  4. Barrière lumineuse à sécurité intrinsèque selon les revendications 1 et 2, caractérisée en ce que le circuit d'autocontrôle ZDU (6) comporte une sortie qui émet un signal de test périodique (TSA, TSB) interrompant par l'intermédiaire de blocs fonctionnels d'exploitation (3, 4, 5) l'alimentation des relais (A, B) pour une durée qui est inférieure à la durée de mise au repos (t repos) desdits relais.
  5. Barrière lumineuse à sécurité intrinsèque selon les revendications 1 et 2, caractérisée en ce que le circuit de signaux horaires (tVB) prévu dans le circuit d'autocontrôle ZDU (6) du canal B de la barrière lumineuse à sécurité intrinsèque est conçu comme un circuit de synchronisation qui génère un temps de retard d'impulsion (tPV).
  6. Barrière lumineuse à sécurité intrinsèque selon les revendications 1 et 2, caractérisée en ce que les circuits de signaux horaires (t3A, t3B) sont conçus comme des circuits de synchronisation qui génèrent des signaux horaires se distinguant les uns des autres suivant le temps de retard d'impulsion (tPV).
  7. Barrière lumineuse à sécurité intrinsèque selon les revendications 1 et 2, caractérisée en ce que le circuit de signaux horaires (t1A) est conçu comme un circuit de temporisation qui génère un signal horaire couvrant dans le temps le signal de test (TSB).
  8. Barrière lumineuse a sécurité intrinsèque selon la revendication 1, caractérisée en ce que des rayons lumineux (11) présentent des directions opposées grâce à un positionnement opposé de diodes d'émission (SA, SB).
  9. Barrière lumineuse a sécurité intrinsèque selon la revendication 1, caractérisée en ce qu'il est prévu au moins un circuit de court-circuit d'indicateur d'étage (8) qui est commandé par des signaux SPS et TSA/TSB et une photodiode HDA/HDB, qui commande un émetteur auxiliaire HSA/HSB et qui provoque un court-circuit optique.
EP91117175A 1990-10-31 1991-10-09 Barrage photoéléctrique à fourche aux deux canaux dans un modèle du type Failsafe Expired - Lifetime EP0483560B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH345790 1990-10-31
CH3457/90 1990-10-31

Publications (2)

Publication Number Publication Date
EP0483560A1 EP0483560A1 (fr) 1992-05-06
EP0483560B1 true EP0483560B1 (fr) 1995-08-09

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Application Number Title Priority Date Filing Date
EP91117175A Expired - Lifetime EP0483560B1 (fr) 1990-10-31 1991-10-09 Barrage photoéléctrique à fourche aux deux canaux dans un modèle du type Failsafe

Country Status (8)

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US (1) US5247139A (fr)
EP (1) EP0483560B1 (fr)
JP (1) JP3043867B2 (fr)
AT (1) ATE126172T1 (fr)
CA (1) CA2054676C (fr)
DE (1) DE59106212D1 (fr)
ES (1) ES2077759T3 (fr)
HK (1) HK204596A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015074958A1 (fr) 2013-11-21 2015-05-28 Inventio Ag Procédé permettant de faire fonctionner un dispositif de commande d'ascenseur

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DE4112626A1 (de) * 1991-04-18 1992-10-22 Fraunhofer Ges Forschung Ueberwachungseinrichtung fuer eine steuervorrichtung
JPH05338949A (ja) * 1992-06-04 1993-12-21 Mitsubishi Electric Corp かご位置検出装置
US5567931A (en) * 1994-10-25 1996-10-22 Otis Elevator Company Variable beam detection using a dynamic detection threshold
CA2161291C (fr) * 1994-11-18 2006-01-10 Christian Arpagaus Detecteur de vitesse excessive, utilisant plusieurs barrieres lumineuses
KR970059069A (ko) * 1996-01-30 1997-08-12 이종수 엘리베이터의 위치검출기 고장유무 검출회로 및 제어방법
US5889239A (en) * 1996-11-04 1999-03-30 Otis Elevator Company Method for monitoring elevator leveling performance with improved accuracy
JP4177076B2 (ja) * 2002-10-24 2008-11-05 三菱電機株式会社 エレベータのかご位置検出装置
JP4634188B2 (ja) * 2005-02-28 2011-02-16 パナソニック電工Ｓｕｎｘ株式会社 短絡検出回路、検出センサ
US8051954B2 (en) * 2005-08-08 2011-11-08 Otis Elevator Company Method and system for communicating with a controller of an elevator
WO2007127949A2 (fr) * 2006-04-27 2007-11-08 Sko Flo Industries, Inc. Soupape de regulation de debit
WO2007127986A2 (fr) * 2006-04-28 2007-11-08 Sko Flo Industries, Inc. Appareil de mesure d'écoulement
KR100769673B1 (ko) * 2006-06-14 2007-10-24 삼성전자주식회사 위치인식방법 및 위치인식시스템
FI118641B (fi) * 2006-06-21 2008-01-31 Kone Corp Menetelmä ja järjestelmä hississä hissikorin hallitsemattoman liikkeen tunnistamiseksi ja pysäyttämiseksi
US10526169B2 (en) 2014-12-17 2020-01-07 Inventio Ag Safety switching for an elevator system
CN107215738B (zh) * 2017-08-07 2022-09-13 陕西省特种设备质量安全监督检测中心 一种电梯门锁短接检测装置及检测方法
EP3704048B1 (fr) * 2017-10-31 2021-12-01 Inventio AG Dispositif de surveillance de sécurité destiné à surveiller des conditions relatives à la sécurité dans une installation de transport de personnes ainsi que procédé de fonctionnement d'un tel dispositif
CN112093606A (zh) * 2019-06-17 2020-12-18 上海技防电子技术有限公司 一种基于传感器的电梯运行状态监控系统及方法

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US3743056A (en) * 1971-05-19 1973-07-03 Westinghouse Electric Corp Fail-safe detector
US3743058A (en) * 1971-10-14 1973-07-03 Otis Elevator Co Self-adjusting proximity detecting apparatus
US4019606A (en) * 1975-03-21 1977-04-26 Westinghouse Electric Corporation Elevator system
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US4785914A (en) * 1987-06-19 1988-11-22 Westinghouse Electric Corp. Elevator system leveling safeguard control and method
EP0357888B1 (fr) * 1988-08-23 1993-12-29 Inventio Ag Méthode et dispositif pour générer une information d'une cage d'ascenseur
US4898263A (en) * 1988-09-12 1990-02-06 Montgomery Elevator Company Elevator self-diagnostic control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015074958A1 (fr) 2013-11-21 2015-05-28 Inventio Ag Procédé permettant de faire fonctionner un dispositif de commande d'ascenseur
US9745170B2 (en) 2013-11-21 2017-08-29 Inventio Ag Method for operating an elevator control system

Also Published As

Publication number Publication date
DE59106212D1 (de) 1995-09-14
ATE126172T1 (de) 1995-08-15
US5247139A (en) 1993-09-21
ES2077759T3 (es) 1995-12-01
HK204596A (en) 1996-11-15
JPH04292383A (ja) 1992-10-16
JP3043867B2 (ja) 2000-05-22
CA2054676A1 (fr) 1992-05-01
CA2054676C (fr) 2003-06-17
EP0483560A1 (fr) 1992-05-06

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