EP3390259B1 - Procede de surveillance d'un circuit de securite d'un ascenseur et dispositif de surveillance d'un circuit de securite d'un ascenseur - Google Patents
Procede de surveillance d'un circuit de securite d'un ascenseur et dispositif de surveillance d'un circuit de securite d'un ascenseur Download PDFInfo
- Publication number
- EP3390259B1 EP3390259B1 EP16820226.5A EP16820226A EP3390259B1 EP 3390259 B1 EP3390259 B1 EP 3390259B1 EP 16820226 A EP16820226 A EP 16820226A EP 3390259 B1 EP3390259 B1 EP 3390259B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- supply voltage
- limit value
- monitoring
- voltage
- safety 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.)
- Active
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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 system according to the preamble of claim 1 and a monitoring device for a safety circuit of an elevator system according to the preamble of claim 9.
- the EP 1 090 870 B1 describes a method for monitoring a safety circuit and a monitoring device for a safety circuit of an elevator system.
- the monitored safety circuit has a series connection of switches for monitoring devices used for the safety of elevator operation and a voltage source for supplying the series connection with a supply voltage.
- a switching device in the form of a safety relay is connected, which generates signals for an elevator control depending on the switching state of the switches. If all contacts of the safety circuit are closed, the safety relay is activated.
- the elevator control monitors the status of the safety relay and if the safety relay is activated, the elevator control releases, for example, an upcoming travel command.
- the supply voltage is set so that the voltage across the safety relay is constant. Since the supply voltage that can be provided by the voltage source has an upper limit, the supply voltage is monitored and an error message is generated when an upper limit value of 55 V, for example, is reached. If the mentioned error message is present, the voltage source is switched off and the elevator system is thus put out of operation.
- a supply voltage of the safety circuit is monitored to determine whether it exceeds an upper limit value of 55 V, for example.
- the monitored safety circuit has a series connection of switches for monitoring devices serving for the safety of the elevator operation and a voltage source for supplying the series connection with the mentioned supply voltage.
- a switching device is connected, for example in the form of a safety relay, which, depending on the switching state of the switches, generates at least one signal for elevator control.
- the supply voltage is set so that the voltage across the switching device is constant. The setting is made in particular by regulating the voltage across the switching device with the supply voltage as the manipulated variable.
- at least one further parameter of a course 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 connection.
- the total resistance results from the sum of the individual resistances of the switches connected in series.
- the resistance of a switch for example a door contact switch, by means of which it can be checked whether a shaft or cabin door is closed, can increase if the switch becomes dirty over time or contacts corrode.
- the total resistance mentioned can thus indicate that at least one of the switches connected in series can fail in the near future.
- the upper limit of the supply voltage is limited, so that an increasing total resistance can only be compensated to a certain extent by increasing the supply voltage. When the supply voltage reaches the upper limit mentioned, the supply voltage is switched off, in particular, and the elevator system is thus deactivated.
- the supply voltage mentioned is a measure of the total resistance of the series connection.
- a further parameter is checked as to whether a change in the supply voltage exceeds a first change limit value within a first time period.
- a gradient of the supply voltage is thus monitored.
- the mentioned first period of time can be carried out, for example, 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 recognized and reacted to in a short time.
- the change can be caused, for example, by a sudden penetration of dirt or moisture into a switch.
- With a longer period of time longer-term changes in the total resistance, for example due to slowly progressing corrosion of contacts, can be recognized.
- a further parameter is used to determine whether the supply voltage exceeds a first limit value, the first limit value being less than the upper limit value.
- the first limit value can be between 30 V and 50 V, in particular 40 V, for example. This means that a countermeasure can be initiated very easily before the upper limit value is reached and the elevator system is deactivated.
- a further parameter is used to determine whether the supply voltage exceeds a second limit value which is greater than the first limit value and less than the upper limit value.
- the second limit value can be between 45 V and 50 V, in particular 50 V, for example.
- the first and / or second limit value are determined as a function of an initial value of the supply voltage.
- the limit values can thus be adapted particularly well to the actual conditions of the elevator system.
- 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.
- the mentioned initial value corresponds to a supply voltage after initial commissioning or after maintenance of the elevator system. After initial commissioning or after maintenance of the elevator system, it can be assumed that all switches in the safety circuit have been checked and found to be in order. The supply voltage that then arises represents a good and safe reference or initial value. If the supply voltage and thus the total resistance of the switches in the safety circuit increase significantly compared to this initial value, a problem with one or more switches can be concluded with a high degree of probability.
- a further parameter is checked as to whether a change in the supply voltage exceeds a second change limit value within a second time period. In this way, for example, short-term and longer-term changes can advantageously be monitored simultaneously.
- an entry is made in a readable memory, in particular in an error memory or an error circuit.
- the memory can be read out, for example, as part of maintenance.
- the maintenance can, for example, be carried out by a maintenance technician on site.
- the maintenance it is also possible for the maintenance to be carried out as a so-called remote maintenance, in which the fault memory can be accessed from outside via a defined interface, for example via a data line.
- remote maintenance in which the fault memory can be accessed from outside via a defined interface, for example via a data line.
- maintenance of the elevator system is requested as an evaluation of the at least one further parameter.
- Maintenance can be requested, for example, via an interface to a central maintenance center via a data line.
- the level of the supply voltage is considered to be a little high in this case, but not yet very critical. A check as part of the next maintenance is therefore considered sufficient.
- If the supply voltage then additionally exceeds the second limit value it is considered quite likely that without countermeasures it will also reach the upper limit value in the near future and the elevator system will be deactivated. To avoid this, maintenance of the elevator system is requested when the second limit value is reached. A particularly high availability of the elevator system is thus achieved.
- the reason for the request in particular the reaching of the second limit value by the supply voltage in the example described, can also be transmitted.
- a monitoring device for a safety circuit of an elevator system having a series connection of switches for monitoring devices serving for the safety of the elevator operation and a voltage source for supplying the series connection with a supply voltage, and at least at the end of the series connection a switching device is connected which, depending on the switching state of the switches, generates at least one signal for elevator control.
- the supply voltage is set so that the voltage across the switching device is kept constant.
- the monitoring device is intended to monitor whether the supply voltage exceeds an upper limit value.
- the monitoring device is also provided for determining and evaluating at least one further parameter of a course of the supply voltage.
- Fig. 1 1 denotes a safety circuit which consists of a series connection 2 of switches or contacts 3, at least one switching device in the form of a safety relay 4, of a voltage source serving as supply 5 in the form of a voltage converter 10 and of a monitoring unit 6, whereby the signal of the safety relay 4 is fed to an elevator control 7.
- the switches 3 are used to monitor devices serving for the safety of the elevator operation, for example switch 3 is designed as a so-called door contact switch, which is then closed when an associated car door 18 is closed.
- 24 V DC (DC voltage) is present on an input line 8 and is supplied 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 the supply voltage for the series circuit 2 of the switches 3.
- One end of the series circuit 2 of the contacts 3 is connected to the output Out of the voltage converter 10 via a measuring resistor 11, the other end of the series circuit 2 is connected to the safety relays 4 connected.
- the second connection of each safety relay 4 is connected to a common conductor symbolized by a downward-pointing arrow.
- 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 relays 4 to voltage peaks.
- the voltage to be regulated across the safety relay 4 is tapped at point P1 and fed to a network 14 consisting of passive elements, which is connected to the voltage converter 10. If all contacts 3 of the series circuit 2 are closed, the voltage across the safety relay 4 is kept constant, for example at 25 V DC. If the series circuit 2 is open, the output voltage of the voltage converter 10 is kept at, for example, 53 V DC by means of a limiter 15.
- the monitoring unit 6 consists of an overvoltage detector 16, a monitoring device 17 for 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.
- the monitoring device 17 of the supply voltage is 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 from the detectors 16, 19 and the monitoring device 17 are fed to an error circuit 20 which, in the presence of certain error messages, opens the circuit breaker 9, which switches off the voltage at the input In of the DC-DC voltage converter 10.
- the error circuit 20 stores the errors that have occurred in a readable memory 22, which can be read out, for example, by a maintenance center shown via a data line 23.
- a button 21 is provided for manually resetting the error circuit 20. It is also possible that the fault circuit 20 is reset by the maintenance center via the data line 23. Maintenance of the elevator system can also be requested from the maintenance center via the data line 23.
- Fig. 2 shows details of the network 14 and the limiter 15 for voltage regulation via the safety relay 4.
- the output voltage of the voltage converter 10 is kept constant at, for example, 53 V DC by means of a Zener diode Z1.
- a capacitor C1 increases the dynamic Behavior of the limiter 15. If all contacts 3 of the series circuit 2 are closed, the voltage at point P1 across the safety relay 4 is kept constant, for example at 25 V DC.
- the voltage at point P1 is fed via a reverse current-preventing diode D1 to a voltage divider consisting of resistor R3 and resistor R2, the voltage divider point P2 being connected to limiter 15 and a limiter resistor R1, which on the other hand is connected to the "feedback" input of voltage converter 10 is.
- the voltage converter 10 regulates the voltage at the output Out on the basis of the signal at the “Feedback” input.
- Voltage converter 10, series circuit 2 and network 14 form a control circuit which keeps the voltage at point P1 constant. Deviating voltages are detected by the detector 16 and the monitoring device 17.
- a line 24 represents the time course of the supply voltage of the series circuit 2 over several months.
- the course of the supply voltage is shown only as an example and in a very simplified manner.
- the monitoring device 17 monitors the supply voltage, that is to say 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 value U0 of, 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), a third error message (exceeding U3) and a fourth error message when the above limit values are exceeded (Crossing of U4).
- the first and second limit values U2, U3 have been determined as a function of an initial value U1 of the supply voltage, which corresponds to a supply voltage when the elevator installation is started up or last serviced.
- the two limit values U2, U3 are each greater than the initial value U1 by a fixed value. However, it is also possible to set the two limit values independently of an initial value.
- the monitoring device 17 additionally checks whether a change dU1 in the supply voltage within a first time period (t1-t2) exceeds a first change limit value and also whether a change in the supply voltage within a second time period exceeds a second change limit value. A fifth error message is generated if the first change limit value is exceeded and a sixth error message is generated if the second change limit value is exceeded.
- the monitoring device 17 transmits the error messages mentioned 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 In of the DC-DC voltage converter 10.
- a second error message (exceeding U2) and a fifth error message (exceeding the first change limit value) are transmitted
- the error message is only stored in memory 22 and can be read out during the next maintenance.
- a third error message (exceeding U3) and a sixth error message (exceeding the second change limit value) are transmitted, maintenance is requested via 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)
Claims (9)
- Procédé de contrôle d'un circuit de sécurité (1) d'une installation d'ascenseur, dans lequel le circuit de sécurité (1) comporte un montage en série (2) d'interrupteurs (3) pour le contrôle de dispositifs (18) servant à la sécurité du fonctionnement de l'ascenseur et une source de tension (10) pour l'alimentation du montage en série (2) par une tension d'alimentation, et au moins un dispositif de commutation (4) est connecté à l'extrémité du montage en série (2), lequel dispositif de commutation génère, en fonction de l'état de commutation des interrupteurs (3), au moins un signal pour une commande d'ascenseur (7), comprenant au moins les étapes suivantes :- le réglage de la tension d'alimentation de sorte que la tension sur le dispositif de commutation (4) est constante,- le fait de contrôler si la tension d'alimentation dépasse une valeur limite supérieure (U4),au moins une grandeur caractéristique supplémentaire d'une allure de la tension d'alimentation est déterminée et évaluée
caractérisé en ce que,
comme grandeur caractéristique supplémentaire, on vérifie si un changement de la tension d'alimentation dépasse une première valeur limite de changement dans une première période. - Procédé selon la revendication 1,
caractérisé en ce que,
comme grandeur caractéristique supplémentaire, on détermine si la tension d'alimentation dépasse une première valeur limite (U2). - Procédé selon la revendication 2,
caractérisé en ce que,
comme grandeur caractéristique supplémentaire, on détermine si la tension d'alimentation dépasse une seconde valeur limite (U3) qui est supérieure à la première valeur limite. - Procédé selon la revendication 2 ou 3,
caractérisé en ce que
la première et/ou la seconde valeur limite (U2, U3) sont fixées en fonction d'une valeur initiale (U1) de la tension d'alimentation. - Procédé selon la revendication 4,
caractérisé en ce que
ladite valeur initiale (U1) correspond à une tension d'alimentation après la première mise en service ou après la maintenance de l'installation d'ascenseur. - Procédé selon l'une des revendications 1 à 5,
caractérisé en ce que,
comme grandeur caractéristique supplémentaire, on vérifie si un changement de la tension d'alimentation dépasse une seconde valeur limite de changement dans une seconde période. - Procédé selon l'une des revendications 1 à 6,
caractérisé en ce que,
comme évaluation de l'au moins une grandeur caractéristique supplémentaire, une entrée est effectuée dans une mémoire (22) lisible. - Procédé selon l'une des revendications 1 à 7,
caractérisé en ce que,
comme évaluation de l'au moins une grandeur caractéristique supplémentaire, une maintenance de l'installation d'ascenseur est demandée. - Dispositif de contrôle d'un circuit de sécurité (1) d'une installation d'ascenseur, dans lequel le circuit de sécurité (1) comporte un montage en série (2) d'interrupteurs (3) pour le contrôle de dispositifs (18) servant à la sécurité du fonctionnement de l'ascenseur et une source de tension (10) pour l'alimentation du montage en série (2) par une tension d'alimentation, et au moins un dispositif de commutation (4) est connecté à l'extrémité du montage en série (2), lequel dispositif de commutation génère, en fonction de l'état de commutation des interrupteurs (3), au moins un signal pour une commande d'ascenseur (7), la tension d'alimentation étant réglée de sorte que la tension aux bornes du dispositif de commutation (4) est constante et le dispositif de contrôle (17) est prévu pour surveiller si la tension d'alimentation dépasse une valeur limite supérieure,
le dispositif de contrôle (17) est également prévu pour déterminer et évaluer au moins une grandeur caractéristique supplémentaire d'une allure de la tension d'alimentation, caractérisé en ce que
le dispositif de contrôle (17) est également prévu pour vérifier si un changement de la tension d'alimentation dans une première période dépasse une première valeur limite de changement.
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 EP3390259A1 (fr) | 2018-10-24 |
EP3390259B1 true 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)
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 |
CN115362119A (zh) * | 2020-03-31 | 2022-11-18 | 因温特奥股份公司 | 用于对电梯设备进行安全监控的安全监控装置和方法 |
Family Cites Families (4)
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 |
-
2016
- 2016-12-16 US US15/781,729 patent/US20190002239A1/en not_active Abandoned
- 2016-12-16 ES ES16820226T patent/ES2785639T3/es active Active
- 2016-12-16 CA CA3006409A patent/CA3006409A1/fr not_active Abandoned
- 2016-12-16 CN CN201680073101.9A patent/CN108367889A/zh active Pending
- 2016-12-16 BR BR112018010425A patent/BR112018010425A8/pt not_active Application Discontinuation
- 2016-12-16 EP EP16820226.5A patent/EP3390259B1/fr active Active
- 2016-12-16 AU AU2016369356A patent/AU2016369356B2/en not_active Ceased
- 2016-12-16 WO PCT/EP2016/081333 patent/WO2017103039A1/fr active Application Filing
-
2018
- 2018-10-02 HK HK18112581.0A patent/HK1253289A1/zh unknown
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
HK1253289A1 (zh) | 2019-06-14 |
AU2016369356B2 (en) | 2019-09-26 |
BR112018010425A8 (pt) | 2019-02-26 |
CA3006409A1 (fr) | 2017-06-22 |
CN108367889A (zh) | 2018-08-03 |
US20190002239A1 (en) | 2019-01-03 |
EP3390259A1 (fr) | 2018-10-24 |
ES2785639T3 (es) | 2020-10-07 |
AU2016369356A1 (en) | 2018-07-05 |
WO2017103039A1 (fr) | 2017-06-22 |
BR112018010425A2 (pt) | 2018-11-21 |
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