EP3390259A1 - Procédé de contrôle d'un circuit de sécurité d'une installation d'ascenseur et dispositif de contrôle pour un circuit de sécurité d'une installation d'ascenseur - Google Patents

Procédé de contrôle d'un circuit de sécurité d'une installation d'ascenseur et dispositif de contrôle pour un circuit de sécurité d'une installation d'ascenseur

Info

Publication number
EP3390259A1
EP3390259A1 EP16820226.5A EP16820226A EP3390259A1 EP 3390259 A1 EP3390259 A1 EP 3390259A1 EP 16820226 A EP16820226 A EP 16820226A EP 3390259 A1 EP3390259 A1 EP 3390259A1
Authority
EP
European Patent Office
Prior art keywords
supply voltage
voltage
safety
monitoring
circuit
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
EP16820226.5A
Other languages
German (de)
English (en)
Other versions
EP3390259B1 (fr
Inventor
Philipp Zimmerli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inventio AG
Original Assignee
Inventio AG
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.)
Filing date
Publication date
Application filed by Inventio AG filed Critical Inventio AG
Publication of EP3390259A1 publication Critical patent/EP3390259A1/fr
Application granted granted Critical
Publication of EP3390259B1 publication Critical patent/EP3390259B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • B66B5/0018—Devices monitoring the operating condition of the elevator system
    • B66B5/0025—Devices monitoring the operating condition of the elevator system for maintenance or repair

Definitions

  • the invention relates to a method for monitoring a safety circuit of an elevator installation according to the preamble of claim 1 and a
  • Monitoring device for a safety circuit of an elevator installation according to the preamble of claim 10.
  • EP 1 090 870 B1 describes a method for monitoring a safety circuit and a monitoring device for a safety circuit of an elevator installation.
  • the monitored safety circuit has a series circuit of switches for monitoring the safety of the elevator operation serving facilities and a
  • a switching device in the form of a safety relay is connected, which, depending on the switching state of the switch signals for a
  • Elevator control generated. If all contacts of the safety circuit are closed, the safety relay is activated. The elevator control monitors the state of the safety relay and if the safety relay is activated, the elevator control releases, for example, a pending travel command. So that a safety relay with a small voltage width can be used, the supply voltage is set so that the voltage across the safety relay is constant. Because of the
  • Voltage source is limited supplyable supply voltage up, the supply voltage is monitored and generates an error message when reaching an upper limit of 55 V, for example. In the presence of said
  • a supply voltage of the safety circuit is monitored to see whether it exceeds an upper limit of, for example, 55 volts.
  • the monitored safety circuit has a series circuit of switches for monitoring devices used for the safety of the elevator operation and a voltage source for feeding the series circuit with said supply voltage.
  • a switching device is connected, for example in the form of a safety relay, which generates at least one signal for an elevator control depending on the switching state of the switches.
  • the supply voltage is adjusted so that the voltage across the switching device is constant.
  • the adjustment is made in particular by means of a regulation of the voltage across the switching device with the supply voltage as the manipulated variable.
  • at least one further parameter of a profile of the supply voltage is determined and evaluated.
  • the voltage drop across the series connection of the switches represents a measure of the total resistance of the series circuit.
  • the total resistance is the sum of the individual resistances of the series-connected switches.
  • the resistance of a switch such as a door contact switch, which can be used to check whether a manhole or cabin door is closed, may increase if the switch becomes dirty over time or contacts corrode.
  • the said total resistance can thus give an indication that at least one of the series-connected switches can fail in the near future.
  • the height of the supply voltage is limited upwards, so that an increasing total resistance can only be compensated up to a certain extent by increasing the supply voltage. When the supply voltage reaches the above upper limit, the
  • the first limit value can be, for example, between 30 V and 50 V, in particular 40 V. This can easily be initiated before reaching the upper limit and the deactivation of the elevator system a countermeasure.
  • Supply voltage exceeds a second threshold, which is greater than the first limit and less than the upper limit.
  • the second limit value can be, for example, between 45 V and 50 V, in particular 50 V.
  • the limit values can be adapted particularly well to the actual conditions of the elevator installation.
  • the first limit value can be, for example, 10 V and the second limit value, for example 20 V, greater than the initial value of the supply voltage.
  • said initial value corresponds to a
  • Lift system can be assumed that all switches of the safety circuit have been tested and found to be in order. This then sets the then adjusting Supply voltage is a good and safe reference or initial value dar. Increases the supply voltage and thus the total resistance of the switch of
  • a gradient of the supply voltage is monitored.
  • the said first period of time may, for example, be executed as an hour, a day, a week or a month.
  • a short period of time for example of an hour or a day, in particular a short-term change in the resistance of a switch can be detected and reacted to at short notice.
  • the change can be caused for example by a sudden ingress of dirt or moisture into a switch.
  • longer period of time longer term changes in total resistance can be detected, for example, by slowly progressing corrosion of contacts.
  • a readable memory in particular in an error memory or an error circuit.
  • the memory can be read, for example, as part of a maintenance.
  • the maintenance can be carried out by a service technician on site, for example. But it is also possible that the maintenance is carried out as a so-called remote maintenance, in which can be accessed via a defined interface from the outside, for example via a data line to the fault memory.
  • remote maintenance in which can be accessed via a defined interface from the outside, for example via a data line to the fault memory.
  • In the memory is in particular registered whether and if necessary when the supply voltage or its time course has exceeded which limit. This can be easily and inexpensively tested as part of the maintenance, whether the switches of the safety device must be checked in more detail.
  • a maintenance of the elevator installation is requested as evaluation of the at least one further parameter.
  • the request for maintenance can be made for example via an interface to a central maintenance center via a data line.
  • the amount of supply voltage is considered in this case as a little high, but not yet considered very critical. An overhaul during the next maintenance is therefore considered sufficient. If the supply voltage then additionally the second
  • the reaching of the second limit value are transmitted by the supply voltage.
  • the above object is also achieved by a monitoring device for a safety circuit of an elevator system, wherein the safety circuit a
  • the supply voltage is adjusted so that the voltage across the switching device is kept constant.
  • the monitoring device is designed to monitor whether the supply voltage exceeds an upper limit.
  • Monitoring device also provided to determine and evaluate at least one further characteristic of a course of the supply voltage.
  • Fig. 1 is a schematic representation of a safety circuit with regulated
  • Fig. 2 shows details of a voltage regulation serving network and Fig. 3 shows an exemplary course of a supply voltage of the safety circuit over time.
  • Fig. 1, 1 denotes a safety circuit consisting of a series circuit 2 of switches or contacts 3, at least one switching device in the form of a safety relay 4, serving as a feed 5 voltage source in the form of a voltage converter 10 and from a Monitoring unit 6, wherein the signal of the safety relay 4 of an elevator controller 7 is supplied.
  • the switches 3 are used to monitor the safety of the elevator operation serving facilities, for example, switch 3 is designed as a so-called door contact switch, which is then closed when an associated cabin door 18 is closed.
  • an input line 8 is for example 24 V DC (DC), which is fed to a circuit breaker 9.
  • the circuit breaker 9 is connected on the output side to the input In of the DC-DC voltage converter 10, which increases the 24 V DC to, for example, 25 V to 50 V DC.
  • the output voltage of the DC-DC voltage converter 10 serves as a supply voltage of the series circuit 2 of the switch 3.
  • Series circuit 2 of the contacts 3 is connected via a measuring resistor 11 to the output Out of the voltage converter 10, the other end of the series circuit 2 is connected to the safety relay 4.
  • the second terminal of each safety relay 4 is connected to a symbolized by a downward arrow common conductor.
  • the switching state of the safety relay 4 is transmitted to a relay contact 12 via which the elevator control 7 carries a signal voltage.
  • a protective diode 13 is connected via the safety relay 4.
  • the voltage to be regulated across the safety relay 4 is tapped at the point PI and fed to a network 14 consisting of passive elements, which is connected to the voltage converter 10. If all the contacts 3 of the series circuit 2 are closed, the voltage across the safety relay 4 is kept constant at, for example, 25 V DC. If the series circuit 2 is open, the output voltage of the voltage converter 10 is held by means of a limiter 15, for example 53 V DC.
  • the monitoring unit 6 consists of an overvoltage detector 16, a monitoring device 17 of the supply voltage and an overcurrent detector 19.
  • the overvoltage detector 16 monitors the voltage across the safety relay 4 and generates an error message if the monitored voltage exceeds 28 V DC, for example.
  • On the monitoring device 17 of the supply voltage will be discussed in more detail below.
  • the overcurrent detector 19 monitors the current flowing in the series circuit 2 in the form of a voltage across the measuring resistor 11 and generates an error message if the monitored current exceeds 300 mA, for example.
  • the error messages of the detectors 16,19 and the monitoring device 17 are fed to a faulty circuit 20 which opens the circuit breaker 9 in the presence of certain error messages, the voltage at the input of the DC-DC
  • the error circuit 20 stores the errors that have occurred in a readable memory 22, which can be read out, for example, from a service center represented via a data line 23.
  • a button 21 is provided for manual reset of the faulty circuit 20. It is also possible for the fault circuit 20 to be reset by the maintenance center via the data line 23. Via the data line 23, a maintenance of the
  • Elevator system to be requested at the maintenance center.
  • Fig. 2 shows details of the network 14 and the limiter 15 for
  • the voltage at point PI above the safety relay 4 is kept constant at, for example, 25 V DC.
  • the voltage at the point PI is supplied via a remind place ström preventing diode Dl a voltage divider consisting of resistor R3 and resistor R2, wherein the voltage divider P2 is connected to the limiter 15 and a limiter resistor Rl, on the other hand to the input "feedback" of the voltage converter 10 is connected because of the signal at the input "Feedback"
  • Voltage converter 10 the voltage at the output Out.
  • Voltage converter 10, series circuit 2 and network 14 form a control loop that keeps the voltage at point PI constant. Deviating voltages are supplied by the detector 16 and the
  • a line 24 represents the time profile of the supply voltage of the series circuit 2 over several months.
  • the course of the supply voltage is shown only by way of example and very simplified.
  • the monitoring device 17 monitors the supply voltage, ie the voltage at the output Out of the voltage converter 10 and generates a first error message when the supply voltage falls below a lower limit U0, for example, 23 V. It also monitors whether the supply voltage exceeds a first limit value U2, a second limit value U3 and an upper limit value U4 and generates a second error message (exceeding U2) when exceeding the stated limit values, a third error message (exceeding U3) and a fourth error message (Exceeding U4).
  • the first and second limit values U2, U3 are dependent on one
  • Initial value Ul of the supply voltage has been set, which corresponds to a supply voltage at a first start-up or a last maintenance of the elevator system.
  • the two limit values U2, U3 are each greater than the initial value U1 by a specified value. However, it is also possible for the two limit values to be determined independently of an initial value.
  • the monitoring device 17 additionally checks whether a change dUl the supply voltage within a first time period (tl - 12) exceeds a first change threshold and also whether a change in the supply voltage within a second time period exceeds a second change threshold. If the first change limit value is exceeded, a fifth error message is generated and if the second change limit value is exceeded, a sixth error message is generated.
  • the monitoring device 17 transmits said error messages to the error circuit 20, which reacts differently depending on the type of error message.
  • the error circuit 20 Upon transmission of a first error message (falling below U0) or a fourth error message (exceeding U4), the error circuit 20 opens the circuit breaker 9, which switches off the voltage at the input of the DC-DC voltage converter 10.
  • the error circuit 20 When transmitting a second error message (exceeding U2) and a fifth error message (exceeding the first change limit), the
  • a third error message (exceeding U3) and a sixth error message (exceeding the second change limit value)
  • maintenance is requested via the data line 23.

Landscapes

  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
  • Elevator Control (AREA)
  • Keying Circuit Devices (AREA)

Abstract

L'invention concerne un procédé de contrôle d'un circuit de sécurité et un dispositif de contrôle pour un circuit de sécurité d'une installation d'ascenseur. L'invention concerne un dispositif de contrôle (17) d'une tension d'alimentation d'un montage en série (2) d'interrupteurs (3) pour le contrôle de dispositifs (18) servant à la sécurité du fonctionnement de l'ascenseur. Des relais de sécurité (4) sont connectés à l'extrémité du montage en série (2), lesquels relais de sécurité génèrent, en fonction de l'état de commutation des interrupteurs (3), des signaux pour une commande d'ascenseur (7). La tension d'alimentation est réglée de telle sorte que la tension aux bornes des relais de sécurité (4) soit constante. Puisque la tension d'alimentation pouvant être fournie par la source de tension (10) est limitée vers le haut, la tension d'alimentation est contrôlée et un message d'erreur est généré lorsqu'une valeur limite supérieure est atteinte. L'invention vise à permettre une disponibilité élevée de l'installation d'ascenseur. À cet effet, au moins une grandeur caractéristique supplémentaire d'une allure de la tension d'alimentation est déterminée et évaluée.
EP16820226.5A 2015-12-17 2016-12-16 Procede de surveillance d'un circuit de securite d'un ascenseur et dispositif de surveillance d'un circuit de securite d'un ascenseur Active EP3390259B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP15200893 2015-12-17
PCT/EP2016/081333 WO2017103039A1 (fr) 2015-12-17 2016-12-16 Procédé de contrôle d'un circuit de sécurité d'une installation d'ascenseur et dispositif de contrôle pour un circuit de sécurité d'une installation d'ascenseur

Publications (2)

Publication Number Publication Date
EP3390259A1 true EP3390259A1 (fr) 2018-10-24
EP3390259B1 EP3390259B1 (fr) 2020-03-04

Family

ID=54936858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16820226.5A Active EP3390259B1 (fr) 2015-12-17 2016-12-16 Procede de surveillance d'un circuit de securite d'un ascenseur et dispositif de surveillance d'un circuit de securite d'un ascenseur

Country Status (9)

Country Link
US (1) US20190002239A1 (fr)
EP (1) EP3390259B1 (fr)
CN (1) CN108367889A (fr)
AU (1) AU2016369356B2 (fr)
BR (1) BR112018010425A8 (fr)
CA (1) CA3006409A1 (fr)
ES (1) ES2785639T3 (fr)
HK (1) HK1253289A1 (fr)
WO (1) WO2017103039A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3342744B1 (fr) * 2016-12-29 2020-07-01 KONE Corporation Procédé de commande d'un ascenseur et ascenseur
US10636272B2 (en) * 2018-09-26 2020-04-28 Otis Elevator Company Time domain reflectometry for electrical safety chain condition based maintenance
US20210182386A1 (en) * 2019-12-11 2021-06-17 Samsung Electronics Co., Ltd. Electronic apparatus that monitors a safety function and a controlling method thereof
WO2021197811A1 (fr) * 2020-03-31 2021-10-07 Inventio Ag Dispositif de surveillance de sécurité, et procédé de surveillance de sécurité d'un système d'ascenseur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4507292B2 (ja) * 1999-04-23 2010-07-21 ソニー株式会社 定電圧レギュレータ回路
EP1090870B1 (fr) * 1999-10-08 2007-07-04 Inventio Ag Chaîne de sécurité pour installation d'ascenseur
WO2006108433A1 (fr) * 2005-04-11 2006-10-19 Otis Elevator Company Circuit de securite pour trottoirs roulants
EP2326006A1 (fr) * 2009-11-18 2011-05-25 Inventio AG Commutateur d'une installation électrique

Also Published As

Publication number Publication date
AU2016369356B2 (en) 2019-09-26
HK1253289A1 (zh) 2019-06-14
ES2785639T3 (es) 2020-10-07
CA3006409A1 (fr) 2017-06-22
CN108367889A (zh) 2018-08-03
US20190002239A1 (en) 2019-01-03
WO2017103039A1 (fr) 2017-06-22
EP3390259B1 (fr) 2020-03-04
BR112018010425A8 (pt) 2019-02-26
BR112018010425A2 (pt) 2018-11-21
AU2016369356A1 (en) 2018-07-05

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