EP1547954B1 - Système d'ascenseur et système de surveillance - Google Patents

Système d'ascenseur et système de surveillance Download PDF

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Publication number
EP1547954B1
EP1547954B1 EP04105562A EP04105562A EP1547954B1 EP 1547954 B1 EP1547954 B1 EP 1547954B1 EP 04105562 A EP04105562 A EP 04105562A EP 04105562 A EP04105562 A EP 04105562A EP 1547954 B1 EP1547954 B1 EP 1547954B1
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EP
European Patent Office
Prior art keywords
sensor
bus node
elevator system
control unit
status
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EP04105562A
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German (de)
English (en)
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EP1547954A1 (fr
Inventor
Philipp Angst
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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
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0018—Devices monitoring the operating condition of the elevator system

Definitions

  • the invention relates to an elevator installation with an elevator car which can be moved in a lift shaft by a drive unit.
  • the elevator system is controlled by a control unit.
  • sensors for condition monitoring of the elevator system are provided, which are each connected via an associated bus node to a data bus and connected to the control unit.
  • the invention relates to a monitoring system for an elevator installation which comprises a plurality of bus nodes.
  • the bus nodes are connected via a data bus to a control unit, wherein the bus node is assigned in each case a sensor.
  • the sensor connected to the associated bus node is provided for condition monitoring of the elevator installation.
  • safety contacts are used to detect the condition of the elevator system.
  • Conventional elevator systems use safety contacts, which are interconnected in a series connection, wherein in a functional state of the elevator system all safety contacts are closed, so that a positive state signal of the elevator system can be evaluated in a control unit.
  • the disadvantage of such an interconnection of the safety contacts is that no diagnosis is possible, whether one or more safety contacts are faulty. Consequently, no suitable measures of the control unit for controlling the elevator installation can be made.
  • no identification of the safety contacts is possible, whereby further information about intermediate states or counter readings etc. can not be transmitted.
  • WO 03/020627 A1 describes an elevator system in which detection means are provided which, in the event of a fault in the area of shaft doors or car doors of a controller, provide fault information about the type of fault and the position of the fault. The control can thus trigger a situation-dependent safe response, taking into account the type of fault, the position of the fault and a state information.
  • the detection means which include, for example, power switch, circuit breaker, Hall sensors, etc., are connected via a bus system to a control unit of the elevator system.
  • a control unit of the elevator system To adapt this bus system to safety requirements, for example, distributed sensors are used, two or more sensors being provided for mutual control or mutual assistance.
  • the detection means are set in the event of a fault in a safe state, so as not to adversely affect the elevator system.
  • the detection means are connected via bus nodes to the bus system, the bus nodes are improved by built redundant design in their safety and thus increase the security of the entire system.
  • a disadvantage of such an embodiment of the bus system is that a bus node can also transmit a faulty message to the controller, although the sensor assigned to this bus node reports a faultless or functional state of the elevator system and there is actually no faulty state.
  • the invention has for its object to overcome the above problems and to provide an elevator system and a monitoring system for an elevator system with improved reliability and improved availability.
  • the invention is based on the idea that a bus node, which is not supplied with a voltage, can not transmit an erroneous status message to the control unit, so that when a status query no status message is carried out. Thus, it is possible to prevent the transmission of faultless states even though there is a fault.
  • the invention provides that the sensor controls the voltage supply of the bus node as a function of the detected state of the elevator system.
  • the power supply of the associated bus node is switched off in a state of the sensor which characterizes a faulty state of the elevator system. This makes it possible that the state of this sensor is only transmitted to the control unit when a faultless or functional condition of the elevator system is present. If a faulty state of the elevator system is present, the sensor remains in this faulty state and the power supply of the associated bus node remains switched off.
  • the bus node is designed to be passive, so that the state of the bus node can be called up by the control unit. As a result, the effort to implement the bus node remains low.
  • the bus node is actively formed.
  • the bus node of the control unit transmits the Condition of the assigned sensor.
  • Such active bus nodes are designed more complex, but the control unit with such active bus nodes are more decentralized and the complexity of the control unit can be reduced.
  • the control unit classifies this bus node with the associated sensor as faulty in the absence of a status message of a bus node within a predetermined period of time.
  • a bus node is consequently classified as faulty if, after a while, no feedback occurs at a passive bus node or, in the case of an active bus node, the bus node does not transmit a status message to the control unit.
  • the control unit is thus able to detect whether the sensor is in a faultless or in a faulty state.
  • control unit initiates suitable measures for controlling the elevator installation as a function of the reported or transmitted states of the bus nodes.
  • diagnosis in which sensor is a fault, an adequate measure can be taken to improve the availability or reliability of the elevator system targeted.
  • the bus nodes transmit an identification to the control unit when the status is transmitted. This avoids a bus node transmitting to another bus node a status message that may be incorrect.
  • the senor comprises a contact which controls the power supply of the associated bus node.
  • the contact may be formed by a power switch or by an off switch.
  • an open or closed contact of the sensor may be erroneous or as such functional condition.
  • the sensors are formed contactless. Such sensors detect by magnetic fields, for example, a certain state, so that the power supply of the associated bus node can be controlled in dependence on a particular state of the non-contact sensor.
  • FIG. 1 shows an elevator installation according to the present invention
  • FIG. 2 shows a monitoring system according to the present invention
  • Figure 3 is a trained as a switch sensor.
  • FIG. 1 shows an elevator installation 10 with an elevator car 12, which is moved in an elevator shaft 15.
  • the elevator car 12 is moved by a drive unit 14 in the elevator shaft 15 between floors A, B, and C of a building.
  • the elevator car 12 has car doors 13 and a cab control 19.
  • each shaft door 11 are arranged.
  • At each shaft door 11 at least one sensor 17 is arranged, which is connected to an associated bus node 18, wherein the bus node 18 are connected via a data bus 22 to a control unit 16.
  • the sensors 17 on the floors A, B and C are each designed as a power switch, which are closed when actuated.
  • the control unit 16 controls the elevator system 10 and is connected for this purpose with the drive unit 14, the cabin controller 19 and the data bus 22 and the bus node 18 with the associated sensors 17.
  • the sensors 17 form a so-called safety chain.
  • the control unit 16 may also be a door monitoring unit or simply a monitoring unit.
  • FIG. 2 shows a monitoring system for controlling the elevator installation 10.
  • the monitoring system comprises the sensors 17, which are each connected to a voltage supply line Vcc and to the assigned bus node 18.
  • the bus nodes 18 are connected to the data bus 22 and thus connected to the control unit 16.
  • the sensors 17 are particularly simple, since the sensors 17 each consist only of the power switch, which is closed with closed shaft doors 11, thereby connecting the connected bus node 18 to the power supply line Vcc.
  • the bus node 18 receives the power supply required for operation and can either automatically transmit the state of the sensor 17 to the control unit 16 or transmit its state at the next query the control unit 16.
  • Elevators are known to be subject to high safety standards. To comply with these safety standards, before a movement of the elevator car 12 in the elevator shaft 15, the status or state of the Security chain queried.
  • the bus nodes 18 can be designed as active bus node 18 and thus automatically send their state to the control unit 16 at previously determinable states of the elevator system 10.
  • the bus nodes 18 may also be designed to be passive and transmit the state of the bus node 18 and / or the associated sensor 17 to the control unit 16 by means of a polling method. For this purpose, each bus node 18 is prompted at a given time by the control unit 16 to transmit its state.
  • the control unit 16 receives the states of the sensors 17 to be checked, evaluates them and initiates suitable control operations.
  • the elevator car 12 can, for example, only be moved if all sensors 17 indicate closed shaft doors 11 and car doors 13. In the embodiment shown, only the sensors 17 on the shaft doors 11 on the individual floors A, B and C are shown for the sake of clarity.
  • the elevator installation 10 and in particular the safety chain can contain other sensors, not shown. For example, limit switches may be arranged on the top and bottom floors A and C, which prevent further travel beyond the floors.
  • one or more sensors, which indicate the state of the car door 13 can be attached to the car door 13 of the elevator car 12.
  • the voltage supply of the bus node 18 is controlled in dependence on the states of the associated sensors 17. This ensures that the respective bus node 18 transmits its state or that of the associated sensor 17 to the control unit 16 only when the sensor 17 indicates a fault-free state. If a sensor 17 has a faulty state, the bus node 18 remains currentless and can not report this state. However, the control unit 16 still recognizes that in this sensor 17 on a certain floor a There is an error because the status message from this sensor 17 is missing. As a result, it is possible to prevent the bus node 18 from reporting a faulty state to the control unit 16 despite a functioning state of the sensor 17.
  • the control unit 16 detects the corresponding error in the safety chain and can initiate appropriate measures.
  • the simplest measure is an emergency stop of the elevator car 12.
  • a forced drive of the elevator car 12 at reduced speed to the ground floor can also be initiated or a service center can be informed.
  • Particularly advantageous in this embodiment of the safety chain is the possibility of unambiguous identification of the faulty sensor 17 or bus node 18.
  • the bus node 18 When transmitting the state of the sensor 17 or the bus node 18, the bus node 18 also transmits a unique identification, so that the control unit 16, the location of Recognize errors and take appropriate measures. For example, in the event of a fault in the car doors 13, the control unit 16 may try to close the car doors 13 again by instructing the car control 19 to repeatedly open and close the doors.
  • the safety chain and position sensors can be involved, which determines whether the elevator car 12 reaches a correspondingly permissible position in the elevator shaft 15 and the doors 11, 13 can be opened. If a status message is missing from such a position sensor, this may be because the elevator car 12 has not yet reached the prescribed exit position.
  • the control unit 16 recognizes this condition and attempts the elevator car 12 to move to a corresponding allowable exit position at which the position sensors turn on the associated bus node 18, so that the status message about the error-free state of the position sensor can be reported to the control unit 16.
  • the monitoring system may also include sensors 23, which are designed for example as a circuit breaker or Hall sensors.
  • FIG. 3 shows a sensor 23 designed as a circuit breaker which is opened when actuated. In this case, the connection to the power supply line Vcc is closed with the shaft doors 11 closed, so that the associated bus node 18 is supplied with power and can transmit its state to the control unit 16. If the shaft doors 11 are opened, the power supply is interrupted and the bus node 18 can not issue a faulty status message.
  • the sensors 17, 23 may also be formed without contact.
  • proximity switches that respond to an electronic or magnetic field may be used.
  • the connection to the power supply Vcc is interrupted when, for example, no magnetic field is detected. If the shaft doors 11 are closed, a magnetic field is detected by the opposite shaft door 11 and the voltage supply line Vcc in the sensor 17 is connected to the bus node 18.
  • the sensor 17 may also be designed as a Hall sensor.
  • the voltage supply Vcc of the bus node 18 is electronically controlled in the sensor 17, in such a way that the bus node 18 remains de-energized when the sensor 17 detects an unsafe or faulty state.
  • a (virtual) ring is passed from one bus node 18 to the next.
  • the individual bus nodes 18 send their status message upon receipt of the ring and then pass it on to the next bus node 18. If the ring is back again at the control unit 16, the control unit 16 recognizes that all bus nodes 18 have issued their status message.
  • a similar method provides that the control unit 16 monitors whether it receives from all bus nodes 18 a status message within a predefined period of time, for example 5 ms.
  • the design of the elevator installation 10 ensures a safety chain which is designed so that no incorrect transmission of the existing state of the sensor 17 by the bus node 18 can occur.
  • an identification of the fault location is possible by the bus node 18 used. It can be prevented that a bus node 18 does not erroneously recognize or not transmit a dangerous or faulty state. With the identification of the bus node 18 is guaranteed that not another bus node 18 under the wrong address unrecognized can issue a status message to the control unit 16.
  • bus node 18 is at floor B in the name of the bus node node 18 Floor A reports that the bus node 18 on floor A is faultless because bus node 18 on floor A is out of power due to an open contact and can no longer respond.

Landscapes

  • Indicating And Signalling Devices For Elevators (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Elevator Control (AREA)
  • Selective Calling Equipment (AREA)

Claims (23)

  1. Système d'ascenseur avec une cabine d'ascenseur (12) déplaçable dans une cage d'ascenseur (15) grâce à une unité d'entraînement (14), auquel cas le système d'ascenseur (10) est susceptible d'être commandé par une unité de commande (16) et des détecteurs (17, 23) sont prévus pour la surveillance de l'état du système d'ascenseur (10) et auquel cas les détecteurs (17, 23) sont connectés respectivement par un noeud de bus (18) correspondant avec un bus de données (22) et sont reliés avec l'unité de commande (16), caractérisé en ce que le détecteur (17, 23) commande une alimentation en courant (Vcc) du noeud de bus (18) correspondant.
  2. Système d'ascenseur selon la revendication 1, caractérisé en ce que lors d'un état du détecteur (17, 23) qui caractérise un état défectueux du système d'ascenseur (10), l'alimentation en courant (Vcc) du noeud de bus (18) correspondant est interrompue.
  3. Système d'ascenseur selon la revendication 1 ou 2, caractérisé en ce que le noeud de bus (18) est formé de sorte à être passif, auquel cas l'état du détecteur (17) affecté au noeud de bus (18) est susceptible d'être interrogé par l'unité de commande (16).
  4. Système d'ascenseur selon la revendication 1 ou 2, caractérisé en ce que le noeud de bus (18) est formé de sorte à être actif, auquel cas le noeud de bus (18) transmet à l'unité de commande (16) l'état du détecteur (17) correspondant.
  5. Système d'ascenseur selon une des revendications de 1 à 4, caractérisé en ce que le noeud de bus (18) est classé comme défectueux lors de l'absence d'un message sur l'état dans l'unité de commande (16) pendant un laps de temps prédéfini.
  6. Système d'ascenseur selon une des revendications de 1 à 5, caractérisé en ce que l'unité de commande (16) déclanche des mesures appropriées pour la commande du système d'ascenseur (10) en fonctions des états des noeuds de bus (18).
  7. Système d'ascenseur selon une des revendications de 1 à 6, caractérisé en ce que le noeud de bus (18) s'identifie auprès de l'unité de commande (16) lors d'une transmission d'un état.
  8. Système d'ascenseur selon une des revendications de 1 à 7, caractérisé en ce que le détecteur (17, 23) comprend un contact qui commande l'alimentation en courant (Vcc) du noeud de bus (18) correspondant.
  9. Système d'ascenseur selon la revendication 8, caractérisé en ce qu'il existe un état défectueux du système d'ascenseur (10) dans le cas d'un contact ouvert ou fermé du détecteur (17, 23).
  10. Système d'ascenseur selon une des revendications de 1 à 7, caractérisé en ce que le détecteur (17) est formé de sorte à être sans contact et l'alimentation en courant (Vcc) du noeud de bus (18) correspondant est susceptible d'être commandé grâce à l'état du détecteur sans contact (17).
  11. Système d'ascenseur selon une des revendications de 1 à 10, caractérisé en ce que le détecteur (17) est prévu redondant.
  12. Système d'ascenseur selon la revendication 11, caractérisé en ce que le noeud de bus (18) est alors uniquement relié à l'alimentation en courant (Vcc) que si le détecteur (17) prévu redondant admet un état sûr.
  13. Système d'ascenseur selon une des revendications de 11 ou 12, caractérisé en ce que le détecteur (17) prévu redondant se compose de plusieurs détecteurs (17).
  14. Système de surveillance pour un système d'ascenseur (10) qui comprend plusieurs noeuds de bus (18), auquel cas les noeud de bus (18) sont connectés à une unité de commande (16) par un bus de données (22) et auquel cas un détecteur (17, 23) est respectivement affecté aux noeuds de bus, un tel détecteur (17, 23) étant prévu pour la surveillance de l'état du système d'ascenseur (10), ce détecteur (17, 23) étant relié avec le noeud de bus (18) correspondant, caractérisé en ce que le détecteur (17, 23) commande une alimentation en courant (Vcc) du noeud de bus (18) correspondant.
  15. Système de surveillance selon la revendication 14, caractérisé en ce que le noeud de bus (18) est formé de sorte à être passif et l'état du noeud de bus (18) et/ou du détecteur (17, 23) correspondant est susceptible d'être interrogé par l'unité de commande (16) ou que le noeud de bus (18) est formé de sorte à être actif, auquel cas le noeud de bus (18) transmet à l'unité de commande (16) l'état du noeud de bus (18) et/ou du détecteur (17, 23) correspondant.
  16. Système de surveillance selon la revendication 14 ou 15, caractérisé en ce que le noeud de bus (18) est classé comme défectueux lors de l'absence d'un message sur l'état dans l'unité de commande (16) pendant un laps de temps prédéfini.
  17. Système de surveillance selon une des revendications de 14 à 16, caractérisé en ce que le noeud de bus (18) s'identifie auprès de l'unité de commande (16) lors d'une transmission d'un état
  18. Système de surveillance selon une des revendications de 14 à 17, caractérisé en ce que le détecteur (17, 23) comprend un contact qui commande l'alimentation en courant (Vcc) du noeud de bus (18) correspondant, auquel cas il existe un état défectueux du système d'ascenseur (10) dans le cas d'un contact ouvert ou fermé du détecteur (17, 23).
  19. Système de surveillance selon une des revendications de 14 à 17, caractérisé en ce que le détecteur (17) est formé de sorte à être sans contact et l'alimentation en courant (Vcc) du noeud de bus (18) correspondant est susceptible d'être commandé grâce à l'état du détecteur sans contact (17).
  20. Système de surveillance selon une des revendications de 14 à 20, caractérisé en ce que dans le cas d'un état du détecteur (17, 23) qui caractérise un état défectueux, l'alimentation en courant (Vcc) du noeud de bus (18) correspondant est interrompue.
  21. Système de surveillance selon une des revendications de 14 à 20, caractérisé en ce que le détecteur (17) est prévu redondant.
  22. Système de surveillance selon la revendication 21, caractérisé en ce que le noeud de bus (18) est alors uniquement relié avec l'alimentation en courant (Vcc) que si le détecteur (17) prévu redondant admet un état sûr.
  23. Système de surveillance selon une des revendications 21 ou 22, caractérisé en ce que le détecteur (17) prévu redondant se compose de plusieurs détecteurs (17).
EP04105562A 2003-11-11 2004-11-05 Système d'ascenseur et système de surveillance Expired - Lifetime EP1547954B1 (fr)

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Application Number Priority Date Filing Date Title
EP04105562A EP1547954B1 (fr) 2003-11-11 2004-11-05 Système d'ascenseur et système de surveillance

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03405804 2003-11-11
EP03405804 2003-11-11
EP04105562A EP1547954B1 (fr) 2003-11-11 2004-11-05 Système d'ascenseur et système de surveillance

Publications (2)

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EP1547954A1 EP1547954A1 (fr) 2005-06-29
EP1547954B1 true EP1547954B1 (fr) 2007-02-28

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US (1) US7325657B2 (fr)
EP (1) EP1547954B1 (fr)
JP (1) JP4699004B2 (fr)
CN (1) CN100357167C (fr)
AT (1) ATE355249T1 (fr)
CA (1) CA2487470C (fr)
DE (1) DE502004003027D1 (fr)
MY (1) MY137863A (fr)
SG (1) SG112018A1 (fr)

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JP4699004B2 (ja) 2011-06-08
EP1547954A1 (fr) 2005-06-29
CN100357167C (zh) 2007-12-26
MY137863A (en) 2009-03-31
DE502004003027D1 (de) 2007-04-12
HK1079752A1 (en) 2006-04-13
JP2005162482A (ja) 2005-06-23
US7325657B2 (en) 2008-02-05
SG112018A1 (en) 2005-06-29
CA2487470A1 (fr) 2005-05-11
US20050098390A1 (en) 2005-05-12
ATE355249T1 (de) 2006-03-15
CA2487470C (fr) 2012-05-01
CN1616335A (zh) 2005-05-18

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