EP2886499A1 - Sicherheitssteuerungssystem für einen Aufzug, eine Fahrtreppe oder einen Fahrsteig - Google Patents

Sicherheitssteuerungssystem für einen Aufzug, eine Fahrtreppe oder einen Fahrsteig Download PDF

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Publication number
EP2886499A1
EP2886499A1 EP14382521.4A EP14382521A EP2886499A1 EP 2886499 A1 EP2886499 A1 EP 2886499A1 EP 14382521 A EP14382521 A EP 14382521A EP 2886499 A1 EP2886499 A1 EP 2886499A1
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EP
European Patent Office
Prior art keywords
safety
node
elevator
electronic
nodes
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
EP14382521.4A
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English (en)
French (fr)
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EP2886499B1 (de
Inventor
José María Martín Corral
Unai Iraola Iraola
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Orona S Coop
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Orona S Coop
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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
    • B66B1/3415—Control system configuration and the data transmission or communication within the control system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B29/00—Safety devices of escalators or moving walkways
    • 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
    • B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons

Definitions

  • the present invention relates to a safety control system for an elevator, escalator or moving walkway and is intended for providing a control system that can be easily scaled, i.e., it can be easily expanded by adding new similar electronic nodes that can be connected to those that already exist, and at the same time allows reducing installation wiring for the purpose of reducing installation costs and facilitating the assembly and maintenance thereof.
  • the safety chain of an elevator, escalator or similar machines is a safety element consisting of a set of contacts or sensors arranged in series, intended for preventing the elevator from being able to start up if any of these contacts or sensors is not properly closed.
  • the safety chain is based on acting on an elevator drive feeder which opens when there is a problem or when the elevator is in a state in which it should not move, for example when the doors are open.
  • the safety chain is formed by all the safety contacts, switches and electromechanical elements of the installation connected in series, such that opening any of them means that the drive contactors are no longer powered. When these contactors are not powered, the machine brake drops (the machine stops) and the energy flow between the regulator and engine is cut off, i.e., torque is cancelled.
  • Said feeder has to travel to all the critical points of the elevator installation and therefore installation and maintenance costs are quite significant.
  • One of the elements that increases the cost of the series of safeties is the inspection push-button box located in the car normally used by maintenance staff, which requires multiple electromechanical elements and wiring.
  • the design of the architecture of the safety chain of an elevator currently corresponds to a system made up of electromechanical devices which intrinsically have a number of associated problems. For example, a serious problem affecting such installations is generated when the contacts of a relay stick together, and the relay is no longer a safe element because it leaves the circuit of the safety chain closed until a technician detects the malfunction, which seriously compromises installation safety.
  • Some of the elements of the series of safeties that have progressed the least are inspection push-button boxes and/or rescue push-button boxes.
  • FIG. 1 A conventional diagram from the state of the art is shown in Figure 1 , where a series of safeties made up of a number of relays connected in series can be seen, such that if one of them is open movement of the elevator is prevented.
  • the safe state is considered to be that in which the series of safeties is open, i.e., at least one of the relays that is part of the series of safeties is open. It can therefore be seen that if one of the relays is stuck together as discussed above, the series of safeties would be accidentally closed, allowing movement of the elevator. Since the relays are not monitored, it is only possible to detect a fault in the relay after the installation malfunctions, which means shutting down the installation until a technician can come to diagnose the malfunction.
  • FIG. 1 shows that an inspection push-button box (1) is part of a safety chain (3) in a control installation, which is controlled by a central control unit (4).
  • a rescue or emergency push-button box (2) which is part of the series of safeties, is also communicated with the central control unit (4).
  • each push-button box (1, 2) is formed by several buttons implemented by means of electromechanical elements and how each push-button box is individually communicated with the central control unit (4).
  • the inspection push-button box (1) is communicated with the central unit (4) by means of a communication bus (5) to which it is connected by means of a node (8).
  • the existing circuit diagram of the safety chain has to be modified to include said push-button box.
  • the present invention solves the drawbacks of the state of the art discussed above by providing a safety control system for an elevator, escalator or moving walkway, whereby reducing installation wiring, reducing costs thereof, while at the same time facilitating the assembly, scalability and maintenance thereof.
  • the safety control system developed in this invention comprises a central control unit and at least one electronic safety node, such that the different nodes are capable of two-way communication with one another and with the central control unit by means of a secure communication bus.
  • the system further comprises a plurality of safety switches connected in series forming a safety chain, as well as at least one state detector of at least one of the components of the elevator, escalator or moving walkway.
  • Each electronic safety node is functionally associated with at least one safety switch which is part of said chain, such that the node controls activation of the switch.
  • At least one electronic safety node is communicated with at least one state detector of a component of the installation and is programmed for processing a signal received from said detector.
  • the electronic safety nodes are programmed for transmitting to one another and to the central control unit, by means of the secure communication bus, information relating to the state of at least one safety switch associated with a node, and information relating to at least one signal received from at least said state detector of a component.
  • each safety node is programmed for controlling its associated safety switch depending on the information received from another safety node and on the information received from its own detectors, such that in case of fault of a first safety node (for example due to the fault of its associated switch), a second safety node would detect that fault situation, and depending on the state of the detectors of the first node, would open the safety chain, i.e., the second node could, if need be, eventually replace the functionality of the first node should the first node suffer a fault.
  • the central control unit is programmed for acting on the driving means of the elevator, escalator or moving walkway, depending on the information it receives from the electronic safety nodes.
  • Each safety node can include a push-button box associated with a programmable electronic device, such that the control system of the invention, implements the push-button boxes, for example rescue and inspection push-button boxes, by means of programmable electronic devices, and this means that these push-button boxes are part of the safety chain and that they act directly on the chain, opening or closing the chain depending on the state of the push-button box itself and of the rest of the push-button boxes.
  • the installation cost is lower and the assembly phase time, as well as costs associated with maintenance, are reduced.
  • the invention reduces the number of electromechanical elements in the safety chain, and those which are used are diverse safety elements, so the typical problems associated with any electromechanical element are avoided, and it furthermore provides a diversified system such that when a component of a node deteriorate, since there are several nodes communicated with and operatively complementing one another, installation safety is assured even if one of them should fail, whereby increasing overall installation safety.
  • the invention provides a control system whereby it is possible to easily redefine the functionality of the push-button boxes by simply modifying the corresponding program, which would not be possible by means of electromechanical components which would make it necessary to replace these components. If the design has to be modified, for example, if an already existing installation implemented according to this invention has to be updated to incorporate one or more additional push-button boxes, this update could be done easily without replacing already installed equipment.
  • system of the invention allows monitoring safety nodes, which in turn facilitates installation maintainability, because the existence of a malfunction can be detected remotely, and the faulty component and the type of fault can be located.
  • Another aspect of the invention relates to an elevator, escalator or moving walkway incorporating a safety control system such as the one described above.
  • a first electronic safety node is arranged in an elevator car and moves with the car, and a second electronic safety node is located at a fixed point of the elevator installation, for example in the pit.
  • Figure 2 shows an embodiment of a safety chain according to the present invention, suitable for controlling an elevator, escalator or moving walkway, where the system comprises three electronic safety nodes (1, 2, 6) which are communicated with one another by means of a secure two-way communication bus (5), and at the same time communicated with a central control unit (4) by means of said communication bus (5).
  • Each electronic safety node (1, 2, 6) is functionally associated with at least one safety switch (1', 2', 6') for controlling activation thereof, which in this case consist of safety relays.
  • those three safety switches (1', 2', 6') are part of the safety chain (3) of the installation, and are therefore connected in series with one another and with the remaining switches forming the safety chain (3), which remaining switches can be conventional switches (10) operating independently with respect to the electronic safety nodes.
  • One or more of those conventional switches (10) can, for example, consist of a state detector of one of the components of the elevator, escalator or moving walkway, such as a button, a limit, a door closing detector, etc.
  • At least one electronic safety node (1, 2, 6) is being communicated with at least one state detector of a component and programmed for processing a signal received from said detector.
  • said detector can consist of the buttons (13) of the electronic push-button box, as shown in Figure 3 .
  • Each electronic safety node (1, 2, 6) is programmed for transmitting to the other nodes and to the central control unit (4) information relating to the state of the safety switch (1', 2', 6') associated with each node, as well as information relating to at least one signal received from said state detector of a component of the installation.
  • the safety nodes and central control unit are communicated by means of the secure communication bus (5) which can be a Safety Bus CAN type, for example.
  • the system of the invention thus allows reducing installation wiring and therefore reducing costs and facilitating assembly, because it is only necessary to arrange the communication bus (5) for communication between the different safety nodes and the central control unit, which can be separated by several meters.
  • each safety node (1, 2, 6) is programmed for controlling its associated safety switch (1', 2', 6') depending on the information received from another safety node and on the information received from its own detectors.
  • the central control unit (4) is programmed for acting on the driving means of the elevator (not depicted), escalator or moving walkway, in a manner that is already known, depending on its own program and depending on the information it receives from the safety nodes (1, 2, 6). However, the central control unit (4) only reads the information present in the bus (5), but it does not transmit anything through it.
  • each safety node includes a programmable electronic device (11) and an electronic push-button box (8) formed by buttons and/or switches (13) corresponding to the possible operations: start-up, ascent, descent, etc.
  • the programmable electronic device (11) is programmed for electronically coding activation of the buttons and/or switches (13) of the push-button box (8), i.e., said device locally monitors the state of the buttons of the push-button box, as well as the state of the associated safety switch, generates a code containing that information and sends it through the safety bus (5).
  • each electronic node (1, 2, 6) receives information relating to the state of the push-button boxes from other nodes (information about the state of inputs and outputs) through the safety bus (5), and processes said information by means of the program being run therein and accordingly acts on the safety chain depending on the state of the local buttons and on the state of the other push-button boxes. Once it makes the decision and correctly runs same, the corresponding node can inform the remaining nodes of the decision made.
  • each electronic safety node (1, 2, 6) monitors operation of its associated safety relay and communicates the state of its relay and of its inputs (in this example, the buttons (13) of the push-button box) to the remaining nodes connected to the safety bus (5). At the same time, each node receives information about the state of the relays and inputs from other safety nodes connected to the bus (5). Based on this information, each electronic safety node (1, 2, 6) runs its program (safety function) and decides whether or not it is necessary to act on its safety switch to activate the safe state of the chain.
  • the program safety function
  • node INSPECTION1 would not be able to open the series of safeties (3) and assure the safe state.
  • both the second safety node (6) (node INSPECTION2) and the third safety node (1) (node RESCUE) can open the series by opening its associated relay if necessary, and thereby assure the safe state, despite the fault of the relay of the node INSPECTION1.
  • Each safety node continuously monitors or reads (14) the state of its inputs and outputs, i.e., the state of its relay and of the associated buttons, and it sends said information to the remaining nodes (15). It also receives (16) that same type of information from the remaining nodes, calculates (17) if this is the case of a safe state and decides (18) whether or not to activate the safe state.
  • Another added advantage is obtained when detecting which relay is defective because any node connected to the secure communication bus knows the state of inputs and outputs of each safety node, including its own, and the repair technician can be informed of exactly which relay is faulty.
  • the central control unit (4) is reading the secure communication bus (5), it is able to assess whether it should activate the drive.
  • the programmable device (11) can consist of a microcontroller, an FPGA or a microprocessor, for example, which is functionally associated with an electronic memory, housing a program implementing logic equations.
  • the safety switches (1', 2', 6') preferably consist of a relay, which can be redundant for improving system safety.
  • first and second safety node (2, 6), including a first and second inspection push-button box (8, 9), respectively, such that one of said push-button boxes can be assembled in an elevator car and another one in the pit of the installation.
  • the mentioned inspection push-button boxes (8, 9) are preferably identical, i.e., they are implemented by means of the same electronic equipment and the same program (the same hardware and the same software), and they must each simply be assigned a different identification code for enabling communication between them and the central control unit.
  • the system can therefore be easily scaled because additional electronic nodes identical to those already existing can be incorporated with minimal modification of the program for simply assigning a new identification code to the new nodes.
  • System operation can also be easily modified, for example, for being adapted to an elevator topology, by simply modifying the program to modify the logic equations it implements, without having to design new complex circuit diagrams, as occurred in the state of the art.
  • the third safety node (1) includes a rescue push-button box (7) which is implemented in this case by means of electronic equipment and a program that is slightly different from the inspection push-button boxes.
  • the safety nodes (2, 6) used to implement the push-button boxes of INSPECTION1 and INSPECTION2 (8, 9) include a mushroom-type emergency stop button (12) which is not monitored by the programmable device (11), but rather is integrated directly in the safety chain (3) for opening it directly.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Escalators And Moving Walkways (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
EP14382521.4A 2013-12-19 2014-12-16 Sicherheitssteuerungssystem für einen Aufzug, eine Fahrtreppe oder einen Fahrsteig Active EP2886499B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201331867A ES2538418B1 (es) 2013-12-19 2013-12-19 Sistema de control de seguridad de un ascensor, escalera mecánica o ánden móvil

Publications (2)

Publication Number Publication Date
EP2886499A1 true EP2886499A1 (de) 2015-06-24
EP2886499B1 EP2886499B1 (de) 2019-05-01

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EP14382521.4A Active EP2886499B1 (de) 2013-12-19 2014-12-16 Sicherheitssteuerungssystem für einen Aufzug, eine Fahrtreppe oder einen Fahrsteig

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EP (1) EP2886499B1 (de)
ES (2) ES2538418B1 (de)
TR (1) TR201908899T4 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016156658A1 (en) * 2015-04-01 2016-10-06 Kone Corporation A brake control apparatus and a method of controlling an elevator brake
CN106698117A (zh) * 2016-12-05 2017-05-24 西继迅达（许昌）电梯有限公司 一种电梯控制系统和电梯门锁旁路装置控制板
CN111115401A (zh) * 2018-10-31 2020-05-08 上海三菱电梯有限公司 附加电梯安全回路及电梯安全系统
US12012307B2 (en) 2018-07-27 2024-06-18 Otis Elevator Company Elevator safety system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110271924A (zh) * 2019-06-10 2019-09-24 苏州汇川技术有限公司 井道开关信号传输系统及电梯

Citations (2)

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Publication number Priority date Publication date Assignee Title
US6173814B1 (en) * 1999-03-04 2001-01-16 Otis Elevator Company Electronic safety system for elevators having a dual redundant safety bus
US20110132696A1 (en) * 2008-08-18 2011-06-09 Andreas Dorsch Method for monitoring a brake system in an elevator system and corresponding brake monitor for an elevator system

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US5360952A (en) * 1993-06-01 1994-11-01 Otis Elevator Company Local area network eleveator communications network
JP2005500965A (ja) * 2001-09-03 2005-01-13 インベンテイオ・アクテイエンゲゼルシヤフト エレベータシステムのドアの領域に不良がある場合の状況依存反応
CN100542927C (zh) * 2005-02-25 2009-09-23 三菱电机株式会社 电梯装置
JP4831995B2 (ja) * 2005-05-11 2011-12-07 三菱電機株式会社 エレベータの安全制御装置
EP2022742B1 (de) * 2007-08-07 2014-06-25 ThyssenKrupp Elevator AG Aufzugsystem
EP2448853B1 (de) * 2009-07-02 2019-10-09 Otis Elevator Company Rettungssystem für einen aufzug
WO2012036663A1 (en) * 2010-09-13 2012-03-22 Otis Elevator Company Elevator safety system and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6173814B1 (en) * 1999-03-04 2001-01-16 Otis Elevator Company Electronic safety system for elevators having a dual redundant safety bus
US20110132696A1 (en) * 2008-08-18 2011-06-09 Andreas Dorsch Method for monitoring a brake system in an elevator system and corresponding brake monitor for an elevator system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016156658A1 (en) * 2015-04-01 2016-10-06 Kone Corporation A brake control apparatus and a method of controlling an elevator brake
US11542118B2 (en) 2015-04-01 2023-01-03 Kone Corporation Brake control apparatus and a method of controlling an elevator brake
CN106698117A (zh) * 2016-12-05 2017-05-24 西继迅达（许昌）电梯有限公司 一种电梯控制系统和电梯门锁旁路装置控制板
CN106698117B (zh) * 2016-12-05 2019-04-26 西继迅达（许昌）电梯有限公司 一种电梯控制系统和电梯门锁旁路装置控制板
US12012307B2 (en) 2018-07-27 2024-06-18 Otis Elevator Company Elevator safety system
CN111115401A (zh) * 2018-10-31 2020-05-08 上海三菱电梯有限公司 附加电梯安全回路及电梯安全系统
CN111115401B (zh) * 2018-10-31 2021-05-25 上海三菱电梯有限公司 附加电梯安全回路及电梯安全系统

Also Published As

Publication number Publication date
ES2538418A1 (es) 2015-06-19
ES2538418B1 (es) 2016-04-14
ES2727962T3 (es) 2019-10-21
EP2886499B1 (de) 2019-05-01
TR201908899T4 (tr) 2019-07-22

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