EP0535205B1 - Installation de surveillance pour un dispositif de commande - Google Patents

Installation de surveillance pour un dispositif de commande Download PDF

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Publication number
EP0535205B1
EP0535205B1 EP92909211A EP92909211A EP0535205B1 EP 0535205 B1 EP0535205 B1 EP 0535205B1 EP 92909211 A EP92909211 A EP 92909211A EP 92909211 A EP92909211 A EP 92909211A EP 0535205 B1 EP0535205 B1 EP 0535205B1
Authority
EP
European Patent Office
Prior art keywords
monitoring
primary control
control
monitoring device
switching unit
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
EP92909211A
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German (de)
English (en)
Other versions
EP0535205A1 (fr
Inventor
Karl-Otto SCHÖLLKOPF
Werner Böhm
Gerhard Kellings
Michael Bollerott
Klaus Scherer
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
TK Aufzuege GmbH
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Thyssen Aufzuege GmbH
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.)
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Application filed by Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV, Thyssen Aufzuege GmbH filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Publication of EP0535205A1 publication Critical patent/EP0535205A1/fr
Application granted granted Critical
Publication of EP0535205B1 publication Critical patent/EP0535205B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B66B5/0006—Monitoring devices or performance analysers
    • 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
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0037—Performance analysers
    • 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
    • B66B5/0087—Devices facilitating maintenance, repair or inspection tasks
    • B66B5/0093—Testing of safety devices

Definitions

  • the invention relates to a monitoring device for a control device having a safety chain, in particular for elevator and conveyor systems, with a contactlessly triggerable, electronic, testable switching device comprising a sensor, with the aid of which the state of the sensor can be detected.
  • a monitoring device of this type is known from EP-A-0 357 888, in which a safety light barrier in the form of a so-called failsafe arrangement is used as the sensor arrangement, in which an error by doubling the components and by comparing the output signals is to be avoided .
  • a switching device which can be actively checked at any time in the sense of the present invention is not described in EP-A-0 357 888. Rather, a functional test is only carried out there if the sensor arrangement on a car passes through an actuation flag permanently installed in the elevator shaft, in accordance with the use of the elevator system.
  • a simple test option would be particularly important in elevator systems, since there are a large number of safety switches that are never operated in normal operation, but should work in an emergency. With these switches, a functional test has so far often only been carried out at large time intervals, since the parts to be monitored had to be moved for the test, which was all the more problematic the more unfavorable the switch or the part in question was accessible to a fitter for testing .
  • each switching device can also be connected to the bus Control connected and in this case be queried in the desired order with regard to their respective switching state, but the query takes more and more time with increasing number of security points.
  • the invention has for its object to provide an improved monitoring device that enables the implementation of a reliable control for elevator and conveyor systems with a safety chain and high safety requirements with comparatively little effort.
  • a monitoring device of the type specified at the outset which has contactlessly triggerable, electronic, testable switching device with control electronics, with the aid of which the state of the sensor is independent of changes in the external states of the monitoring device for test purposes by controlling the sensor can be changed with the help of the control electronics that the switching device has input and output connections for establishing data exchange connections with a higher-level control system, which are designed such that they connect the input and output connections of further switching devices for data exchange with a higher-level control system serving and thus connectable monitoring loop can be connected and by two separate sections for each ascending and returning branch of the monitoring loops are formed such that the monitoring loop each switching device twice, namely outgoing and incoming, runs through and that this enables data exchange by means of a higher-level control and that the switching device has an electronic switching device which, in the event of a safety criterion not being fulfilled, short-circuits the monitoring loop between the ascending and the returning branch in such a way that the switching device in question Status data can be transmitted to
  • the electronic changeover switch of the control electronics can be used as a switch of a safety chain or a safety switch chain, as in the case of a mechanically operated switching device.
  • the monitoring device comprises further testable switching devices and a higher-level control, since this opens up the possibility of establishing a monitoring loop by connecting the switching devices to one another.
  • An output of the higher-level control system can then apply a continuous signal to the input-side end of the monitoring loop, the interruption of which can be detected at the output-side end of the monitoring loop at an input of the higher-level control system.
  • a so-called quiescent current loop can be implemented in a monitoring device according to the invention, which in a further embodiment of the invention takes the form of a continuous signal a defined pulse sequence forms a "digital quiescent current loop".
  • FIG. 1 schematically shows a monitoring device according to the invention in the form of a non-contact electronic switching device with sensor electronics 10 and a magnetic field sensor 12, for example a Hall element, which responds to an external magnetic field.
  • This external magnetic field can be generated, for example, by a permanent magnet 14, which is usually attached to a movable component 15 to be monitored, namely, for example, an elevator door.
  • the sensor 12 supplies a signal in which an electronic (toggle) switch 48 of the sensor electronics 10, indicated by dashed lines, is held in an "unactuated" state , especially when open.
  • the Permanent magnet 14 then, starting from the previously described state, approaches sensor 12 to a predetermined minimum distance, then said switch is switched into its “actuated” state, in particular into its closed state, so that output A of sensor electronics 10 and thus a corresponding control signal is emitted to the switching device as a whole, which indicates that the movable component 15 with the permanent magnet 14 is in the position required for carrying out a specific action, in particular for safety reasons.
  • a magnetic coil 16 is provided, which is dimensioned and arranged with respect to the sensor 12 in such a way that with its help in In the area of the sensor 12, a magnetic field can be generated, which can compensate for the effect of the magnetic field of the permanent magnet 14 present in the detection area of the sensor 12.
  • the switching device under consideration is designed in such a way that the functional test takes place before the initiation of an action monitored by the switching device, a corresponding signal being applied to an input E of the sensor electronics 10 depending on the planned action in order to have a bring about appropriate control of the solenoid 16.
  • the functional test can also be carried out periodically at suitable short intervals, it being possible for the clock for the test processes to be generated in the sensor electronics itself by means of a suitable clock generator.
  • a sensor 12 can be used in the practical implementation of a switching device according to the invention for carrying out the method according to the invention, which has a Hall sensor 18 in the form of an integrated circuit with an open-drain output and a pull-up resistor 20 connected to it includes.
  • One connection of this resistor 20 is connected to a connection terminal to which a supply voltage V DD is present, while the other connection is connected to a circuit point 22 which forms an input of an internal control circuit 24 of the sensor electronics 10.
  • the control circuit 24 which is part of the sensor electronics 10, supplies an output signal for a control block 26, to which a second input signal for activating the magnetic coil 16 can be fed via a signal line 28, which via a corresponding input circuit 30 with a higher-level control, namely a bus control 32 (cf. FIG. 3), can be connected and can be connected on the output side via an output circuit 34 to further sensor electronics circuits which belong to further contactless electronic switching devices.
  • a bus control 32 cf. FIG. 3
  • control block 26 supplies a control signal by which a transistor 36 is controlled to be conductive so that a current can flow through the excitation winding 38 of the magnet coil 16, the excitation winding 38 being connected in parallel with a free-wheeling diode 40 in a conventional manner is.
  • the sensor electronics 10 further comprises a data input line 42 and a data output line 44, these two lines each being provided with an input circuit and an output circuit.
  • the data input line 42 represents an ascending data path starting from the bus control 32 (FIG. 3), via which the sensor electronics circuits 10 of all switching devices belonging to a safety chain are connected.
  • the signal line 28 and the data input line 42 with their assigned input circuits thus correspond to the input E, which is only indicated schematically in FIG. 1.
  • the data output line 44 which corresponds to the output A in FIG. 1, provides one of the connected switching devices to the bus control 32 returning data path.
  • the data input line 42 is connected to a receiving part 46, which samples the data running over the data input line 42 and forms an input register.
  • the receiving part 46 is additionally provided with an input connected to the control circuit 24.
  • a switchover device or switch 48 is inserted into the data output line 44, which is controlled by the output signal of an OR gate 50, the two inputs of which have the switching point 22 or one output of a Transmitting part 52 are connected, either the data output of the transmitting part 52, which supplies status and address signals, or connects the input side of the data output line 44 to its output side.
  • the transmitting part 52 is connected to the control circuit 24 via a further output and a further input.
  • the sensor electronics 10 comprises a clock generator 54 and is otherwise fed from a schematically indicated voltage supply 56, which generates the regulated supply voltage V DD of, for example, 5 V from a possibly unregulated input voltage of 24 V.
  • the voltage V DD is also applied to the solenoid 16.
  • the open-drain output of the Hall sensor 18 is drawn to the supply voltage V DD via the resistor 20 in the absence of a magnetic field and to the reference potential in the presence of a magnetic field. These voltages are at the switching point 22. If an excitation current flows through the magnet coil 16 when the switching device is initially actuated, that is to say starting from a state in which the permanent magnet 14 acts on the sensor 18 and the switching point 22 is at reference potential, then this causes this Previously existing magnetic field on the sensor 18 compensated so that the voltage V DD is supplied to the node 22. This signal change indicates that sensor 18 is functioning properly as the most important part of the switching device.
  • n sensor electronics circuits 10.1, 10.2 to 10.n are provided, to which, as explained for the switching device according to FIG. 2, a sensor 12.1 to 12.n and a magnet coil 16.1 to 16.n are assigned, each sensor cooperates with a permanent magnet 14.1 to 14.n.
  • the permanent magnets 14.1 to 14.n are each connected to a door 15.1 to 15.n as a movable component to be monitored.
  • the individual magnetic coils 16.1 to 16.n can be activated via lines 28 and 42 for test purposes in order to determine whether the associated switching devices are working properly.
  • a coil activation signal is applied to line 28 when a functional test is to be carried out, while the individual switching devices or sensor electronics circuits are called up via address 42 in line with the address.
  • the line 44 provides feedback on the correct functioning of the individual switching devices and on their switching status. If all the switching devices are working properly and all the doors are in the correct position, the bus control 32, which can optionally be connected to other bus controls belonging to other safety circuits, as shown in FIG.
  • FIG. 3 shows that the interconnected sections of line 42 and the interconnected sections of line 44 together with a cross-connection 43 between data input line 42 and data output line 44 of the sensor electronics furthest away from bus controller 32 10.n provided that the switches 48 all occupy such a position that they create a continuous connection, form a closed loop.
  • This loop can serve as a monitoring loop, the ascending branch of which is connected on the input side to an output of the bus control 32 and the returning branch is connected at its end to an input of the bus control 32. Via this monitoring loop, the bus controller 32 can send a continuous signal, the presence of which is monitored on the returning branch of the loop, so that in the end there is a type of quiescent current loop. If the bus controller 32 instead of a simple continuous signal, e.g.
  • a sequence of digital signals on the monitoring loop then a "digital closed-circuit loop" is obtained, which offers particularly advantageous monitoring options, wherein the bus controller 32 checks whether the signal sequence received on the returning branch corresponds to the transmitted signal sequence.
  • the circuit arrangement shown in FIG. 3 can be supplemented in a further embodiment of the invention in that a signal converter 72 is inserted between the upper end of the ascending branch and the beginning of the descending branch in the cross connection 43 between the two branches, as indicated by dashed lines through which the sequence of digital signals arriving via the ascending branch of the monitoring loop is converted in a defined manner into a changed digital signal sequence.
  • this also makes it possible to detect errors which are based on an undesired cross-connection between the ascending and the descending or returning branch of the monitoring loop.
  • Such cross connections can occur, for example, in the event of short circuits in the individual sensor electronics circuits.
  • the monitoring device according to the invention enables a relatively simple structure of a complete control device and ensures reliable, trouble-free operation of the same.

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  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Safety Devices In Control Systems (AREA)
  • Programmable Controllers (AREA)
  • Selective Calling Equipment (AREA)
  • Beans For Foods Or Fodder (AREA)

Claims (11)

  1. Installation de surveillance destinée à un dispositif de commande qui comporte une chaîne de sécurité, en particulier pour des systèmes d'ascenseurs et de transport, comportant une installation (10, 12) de commutation électronique vérifiable, à déclenchement sans contact, comprenant un capteur (12), au moyen de laquelle l'état du capteur peut être détecté,
       caractérisée en ce que l'installation électronique vérifiable de commutation (10, 12) à déclenchement sans contact comporte une électronique de commande (10) au moyen de laquelle l'état du capteur (12) peut à tout instant être modifié, dans un but de vérification, en excitant le capteur (12) au moyen de l'électronique de commande (12), indépendamment de modifications des états extérieurs de l'installation de surveillance,
       en ce que l'installation de commutation (10, 12) comporte des connexions d'entrée et de sortie destinées à former des liaisons qui servent à un échange de données avec une commande (22) maître et qui sont réalisées d'une manière telle qu'elles peuvent être reliées aux connexions d'entrée et de sortie d'autres installations de commutation (10, 12) pour former une boucle de surveillance qui sert à l'échange des données avec une commande maître (32) et qui peut être connectée à cette commande et qu'elles sont constituées par deux sections de parcours à lignes séparées destinées respectivement à une branche de montée et à une branche de retour de la boucle de surveillance de sorte que la boucle de surveillance parcourt deux fois chaque installation de commutation (10, 12), à savoir en partant et en arrivant, et qu'un échange de données est ainsi rendu possible au moyen d'une commande maître (32), et
       en ce que l'installation de commutation (10, 12) comporte une installation électronique d'inversion qui met en court-circuit la boucle de surveillance entre la branche de montée et la branche de retour, dans le cas où un critère de sécurité n'est pas satisfait, d'une manière telle que l'installation de commutation concernée (10, 12) peut communiquer, à une commande maître (32), des données d'état correspondant au critère de sécurité concerné.
  2. Installation de surveillance selon la revendication 1, caractérisée en ce qu'elle comprend d'autres installations de commutation vérifiables (10.2 à 10.n, 12.2 à 12.n) et une commande maître (32), en ce que les connexions d'entrée et de sortie des installations de commutation (10, 12) sont reliées entre elles de manière à former une boucle de surveillance dont la branche de montée est reliée à une sortie de la commande maître (32) et dont la branche de retour contient les installations d'inversion (48) des installations de commutation et sont reliées à une entrée de la commande maître (32) et en ce qu'un signal continu dont l'interruption peut être détectée par la commande maître (32) peut être engendré pour la boucle de surveillance par la commande maître (32) à la sortie de celle-ci.
  3. Installation de surveillance selon la revendication 2, caractérisée en ce que la commande maître (32) peut engendrer comme signal continu une séquence définie d'impulsions qui peuvent être examinées à l'entrée de la commande maître en ce qui concerne leur coïncidence avec la séquence d'impulsions émise.
  4. Installation de surveillance selon la revendication 2 ou 3, caractérisée en ce que la commande maître (32) contient des installations d'adressage au moyen desquelles une partie de réception (46) de chaque installation de commutation (10, 12) peut être adressée individuellement et en ce que chaque installation de commutation (10, 12) comprend une partie d'émission (52) à partir de laquelle une information d'état de l'installation de commutation concernée (10, 12) peut être renvoyée par l'intermédiaire de la branche de retour à la commande maître (32) à l'entrée de celle-ci.
  5. Installation de surveillance selon la revendication 3, caractérisée en ce que les extrémités, éloignées de la commande, de la branche de montée et de la branche de retour de la boucle de surveillance peuvent être reliées entre elles par l'intermédiaire d'un convertisseur (72) de signaux par lequel la séquence de signaux numériques qui entre par la branche de montée de la boucle de surveillance peut être convertie d'une façon définie en une séquence modifiée de signaux numériques.
  6. Installation de surveillance selon la revendication 1, caractérisée en ce que l'installation de commutation (10, 12) comporte un capteur (12) de champ magnétique destiné à surveiller l'état d'un verrouillage mécanique à un aimant permanent mobile (14).
  7. Installation de surveillance selon la revendication 10, caractérisée en ce qu'une bobine de vérification (16), qui peut être activée sélectivement par l'électronique de commande (10) et engendrer un champ magnétique qui compense le champ magnétique de l'aimant permanent (14), est associée à l'installation de commutation.
  8. Installation de surveillance selon la revendication 1 ou 2, caractérisée en ce que l'électronique de commande est réalisée de manière à exécuter une contrôle logique d'information de données appliquées à son entrée (E).
  9. Installation de surveillance selon la revendication 1 ou 2, caractérisée en ce que l'électronique de commande (10) est réalisée sous la forme d'un dispositif de vérification destiné au contrôle logique d'information du fonctionnement de son capteur associé (12).
  10. Installation de surveillance selon la revendication 2, caractérisée en ce que l'état de chaque capteur (12) peut être interrogé individuellement au moyen de la commande maître (32).
  11. Installation de surveillance selon la revendication 10, caractérisée en ce que tous les capteurs (12) peuvent être surveillés par la commande maître (32) au moyen d'un signal continu présent sur la courbe de surveillance à un état uniforme.
EP92909211A 1991-04-18 1992-04-16 Installation de surveillance pour un dispositif de commande Expired - Lifetime EP0535205B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4112626A DE4112626A1 (de) 1991-04-18 1991-04-18 Ueberwachungseinrichtung fuer eine steuervorrichtung
DE4112626 1991-04-18
PCT/EP1992/000853 WO1992018410A1 (fr) 1991-04-18 1992-04-16 Installation de surveillance pour un dispositif de commande

Publications (2)

Publication Number Publication Date
EP0535205A1 EP0535205A1 (fr) 1993-04-07
EP0535205B1 true EP0535205B1 (fr) 1996-02-28

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EP92909211A Expired - Lifetime EP0535205B1 (fr) 1991-04-18 1992-04-16 Installation de surveillance pour un dispositif de commande

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Country Link
US (1) US5487448A (fr)
EP (1) EP0535205B1 (fr)
AT (1) ATE134592T1 (fr)
CA (1) CA2085751C (fr)
DE (2) DE4112626A1 (fr)
ES (1) ES2085624T3 (fr)
WO (1) WO1992018410A1 (fr)

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EP3825706B1 (fr) 2019-11-25 2023-09-27 Otis Elevator Company Noeud electronique de test pour inspection automatique d'une chaine de securite

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Also Published As

Publication number Publication date
ES2085624T3 (es) 1996-06-01
CA2085751A1 (fr) 1992-10-19
WO1992018410A1 (fr) 1992-10-29
DE59205460D1 (de) 1996-04-04
ATE134592T1 (de) 1996-03-15
CA2085751C (fr) 1996-08-20
US5487448A (en) 1996-01-30
EP0535205A1 (fr) 1993-04-07
DE4112626A1 (de) 1992-10-22

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