EP4159658A1 - Procédé de détection de défaillance pour un système d'ascenseur, dispositif de détection de défaillance, kit de détection de défaillance, système d'ascenseur - Google Patents

Procédé de détection de défaillance pour un système d'ascenseur, dispositif de détection de défaillance, kit de détection de défaillance, système d'ascenseur Download PDF

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Publication number
EP4159658A1
EP4159658A1 EP22196190.7A EP22196190A EP4159658A1 EP 4159658 A1 EP4159658 A1 EP 4159658A1 EP 22196190 A EP22196190 A EP 22196190A EP 4159658 A1 EP4159658 A1 EP 4159658A1
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EP
European Patent Office
Prior art keywords
car
time interval
floor
lift system
fault detection
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.)
Pending
Application number
EP22196190.7A
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German (de)
English (en)
Inventor
Roberto Zappa
Maurizio RAGAZZONI
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.)
Iotsafe Srl
Original Assignee
Zetaplan Srl
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 Zetaplan Srl filed Critical Zetaplan Srl
Publication of EP4159658A1 publication Critical patent/EP4159658A1/fr
Pending legal-status Critical Current

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

Definitions

  • the present invention relates to a fault detection method for a lift system, a fault detection device, a fault detection kit, and a lift system.
  • the lift systems of the known type usually comprise a car movable between a plurality of floors, wherein the car comprises at least one car door and each floor comprises at least one floor door.
  • the car is usually provided inside with a button panel with buttons to control the movement of the car to a floor, and a car alarm button configured to signal an alarm when a user is trapped in the car.
  • a button panel with buttons to control the movement of the car to a floor
  • a car alarm button configured to signal an alarm when a user is trapped in the car.
  • the car alarm button by pressing the car alarm button the user can contact a maintenance operations center directly to signal the fault and request prompt action.
  • the car alarm button generates an audible signal which alerts people outside the lift system so that they can contact the maintenance operations center by telephone.
  • the average time between the occurrence of the fault and its solution is between 4 and 6 hours as the market standard, being a severe inconvenience to the trapped users and to the users of the building or facility equipped with a lift system who are forced to walk to their destination floor.
  • a need is strongly felt in the industry to reduce intervention time by restoring the use of the lift system in a short time.
  • the problem underlying the present invention is to devise a fault detection method for a lift system, a fault detection device, a fault detection kit, and a lift system, which have structural and functional features to satisfy the aforementioned requirements and, at the same time, solve the drawbacks mentioned with reference to the prior art and satisfy the aforesaid felt needs.
  • the suggested solutions allow the detection of a system failure before the users utilize the system, thus making it possible to reduce the likelihood of a lift system failure occurring when a user is inside the car.
  • the suggested solutions make it possible to implement a fault detection device which can be easily integrated into previously installed lift systems, both the most modern and the older ones, making it possible to increase their safety levels in a cost-effective and minimally invasive manner.
  • the fault detection method it is possible to detect a fault in the lift system in an automatic manner, and to check the operating status of the lift system remotely without intervening on the switchboard, i.e., completely independently therefrom.
  • a fault detection method is provided for a lift system 100, said lift system 100 comprising a car 101 movable in a travel shaft between a plurality of floors.
  • said car 101 is provided with at least one car door 102, each floor of said plurality of floors being provided with at least one floor door.
  • said fault signal is sent to a cloud server 200.
  • said fault signal is sent to a list of people in charge of maintenance.
  • an activation of step x is provided in an operating time interval.
  • the operation time interval can be set according to time slots in which the lift system is usually less used.
  • the operation time interval can be set to activate periodically.
  • said at least one movement parameter is a parameter detectable on at least one component of a lift system which can be either directly or indirectly correlated with a movement of the car 101.
  • said at least one movement parameter comprises at least either a car acceleration, a car pressure or a car position.
  • car movements can be determined by detecting accelerations in one direction of car travel higher than a given threshold. It also is possible to determine the movement of the car by detecting the pressure inside the shaft or in the car and evaluating the changes thereof. Similarly, the displacement of the car can be determined by monitoring the position of the car and evaluating changes in the position over time.
  • step a1 comprises the following steps:
  • said second floor position is a control position of said car 101, in which said control position is unreachable for an unauthorized user, i.e., in which the car is not configured to stop in normal conditions of use.
  • step a0 and step b0 before step a1 are not provided, it is possible to determine the failure to move the car 101 by sending a single signal to move said car 101.
  • step a1 or step a0 is provided, when step a0 is provided, when the at least one car movement parameter analyzed in step a1 has changed in said second threshold time interval T2.
  • step a1 or step a0 is provided when step a0 is provided when the at least one car movement parameter analyzed in step a2 has not changed for said third threshold time interval T3.
  • step b1 when the previous steps a0 and b0 are provided, it is possible to prevent the failed movement of the car 101 after sending said first signal to move the car 101 to the second floor position from being mistakenly recognized as a failure if the car 101 is already in the second floor position after the first threshold time interval T1 and after the second threshold time interval T2. Therefore, step b1 serves as the control step, and only after verification in step a2 of the movement to a different position, the second floor position, is the possible sending an alarm signal through step b2.
  • the present method of fault detection is a procedure for monitoring the operating status of the lift system which can drastically reduce the fault detection time and the maintenance intervention time.
  • said method comprises the step of: . b4 - sending a stop signal, through a gateway/modem, to an operational center and/or car button panel and/or lift system.
  • said method comprises the step of: . b5 - sending from said cloud server 200 a failure message to a list of people in charge of maintenance.
  • a mobile communication device such as a cell phone
  • said method comprises a step of configuring, wherein said second threshold time interval T2, and said third threshold time interval T3 is set and stored.
  • said first threshold time interval T1, and/or said operation time interval, and/or said second floor position, and/or said second floor position is set and stored in said setting step.
  • said first threshold time interval T1 is greater than said second threshold time interval T2.
  • said second threshold time interval T2 is greater than said third threshold time interval T3.
  • said first threshold time interval T1 is comprised between 1 minute and 60 minutes.
  • said second threshold time interval T2 is comprised between 2 seconds and 60 minutes.
  • said second threshold time interval T2 is comprised between 5 seconds and 1 minute.
  • said third threshold time interval T3 is comprised between 2 seconds and 60 minutes.
  • said third threshold time interval T3 is comprised between 5 seconds and 1 minute.
  • said method comprises the steps of:
  • said predetermined time interval T4 is set in said step of configuration.
  • said at least one vibrational parameter of the lift system comprises car vibrations of said car 101 to be detected during the movement of said car 101.
  • said car vibrations are detected on said car 101, preferably on the roof of said car 101.
  • said at least one vibrational parameter of the lift system comprises car door vibrations of said at least one car door 101 to be detected during the movement of said car door 101.
  • the car door vibrations are measured on said car 101.
  • said at least one vibrational parameter of the lift system comprises accelerations and/or guide vibrations to be detected on said car 101 when said car 101 is stopped.
  • said at least one vibrational parameter of the lift system comprises accelerations and/or driving vibrations to be detected on at least one guide 111 arranged in said shaft along which said car 101 runs when said car 101 is stopped.
  • step c1 it is possible to detect the vibrations and/or accelerations stressing the car during its movements over time, the vibrations and/or accelerations stressing the at least one car door, the vibrations and/or accelerations to which the at least one guide along which the car runs is subjected, when the car is stopped, allowing the stresses and/or accelerations to which the building is subjected to be detected accordingly.
  • Vibrational parameter characteristic means statistical processing of the vibrations and/or accelerations to which the cab and/or cab door and/or cab guide is subjected which were detected over time and analyzed for the predetermined time interval T4.
  • step c2 it is possible to process the vibrational characteristic of the vibrational parameter detected at a specific preset time interval, i.e., the predetermined time interval T4, allowing information to be gathered on the operating status of the car, the car door, and the travel comfort of the lift users.
  • said method comprises the steps of:
  • said standard system vibrational characteristic is set in said step of configuration.
  • Standard system vibrational characteristic means statistical processing of the vibrations to which the car and/or car door and/or car guide are subjected under normal conditions of lift use.
  • the predetermined time interval T4 is either one hour or a predetermined number of hours, e.g., 12 hours or 24 hours, and said previous predetermined time interval T4 is respectively related to the previous hour, or a predetermined number of previous hours, such as the previous 12 hours or the previous 24 hours.
  • the vibrational characteristic of the car movement, and/or the car door and/or the car guide with the previous processed vibrational characteristic, e.g., related to the previous day, it is possible to detect the vibrational changes which occur day by day making it possible to monitor the wear and tear of the system and to detect the presence of damages even imperceptible to a user.
  • step c3 and c4 it is possible to detect vibrational abnormalities during the movements of the car and/or car door and/or car guides and to detect possible causes of lift system failure in advance by virtue of step c5 by which an alarm signal is signaled in a timely manner, e.g., to the cloud server and/or a predetermined list of people. In this manner, it is possible to allow the maintenance staff to intervene before failures occur, saving maintenance costs, avoiding the occurrence of costly failures, and increasing user safety.
  • said method comprises the step of associating said at least one vibrational parameter detected in step c1 with said car movement parameter detected in step x.
  • said detected motion parameter is the position of the car, which is followed by an analysis of its changes over time, it is possible to gather precise information on which car positions are most critical on vibrational and acceleration level, as well as possible positions in which prompt maintenance is needed.
  • said method comprises the step of: . c6 - sending a stop signal to a car control unit and/or to a switchboard of said lift system.
  • said method comprises the step of: . c7 - sending from said cloud server an intervention message to a list of people in charge of maintenance.
  • steps c6 and/or c7 are parallel and/or simultaneous with step b5.
  • said method comprises the following step of: . b51 - sending, from said cloud server 200, said lift system vibrational characteristic in the predefined time interval T4 to said list of people in charge of maintenance.
  • step b51 the people in charge of maintenance are not only informed of the failure of the lift system but also have the opportunity to analyze the vibrational characteristics of the lift system associated with one or more of the vibrational parameters to promptly evaluate the causes of the failure.
  • the present invention further relates to a fault detection device 1 for a lift system 100.
  • the present device 1 is configured to implement the previously described fault detection method.
  • said lift system 100 comprising a car 101 movable along a shaft between a plurality of floors, said car 101 being provided with at least one car 102 and each floor of said plurality of floors being provided with at least one floor door.
  • Said device 1 comprises sensor module 2 configured to detect at least one movement parameter of said car 101 over time.
  • Said device comprises a processing unit 4 configured to analyze changes of the at least one movement parameter detected by said sensor module 2 over time.
  • said processing unit 4 is integrated into said sensor module 2.
  • Said device 1 comprises a signal transmission module 5 configured to send a fault signal to signal a fault in the lift system 100.
  • the signal transmission module 5 is a wireless transmission module.
  • said signal transmission module 5 is configured to communicate with a cloud server 200 and/or a maintenance person list.
  • said signal transmission module 5 is integrated into said sensor module 2.
  • Said device 1 comprises a signal converter module 6 connected to said sensor module 2 and/or said processing unit 4.
  • Said device 1 is constrainable to said car 101.
  • Said device 1 is connectable to an energy power source through a power connection or cable 13.
  • Said signal converter module 6 is electrically connectible by means of a second electrical connection 8 to a second floor second button 104 of a car button panel 105 of said car 101.
  • Electrical connection means an electrical connection cable or a connection port for said electrical connection cable.
  • said signal converter module 6 is configured to be connected either directly or indirectly to a button panel of a car so that said device 1 can control a car movement autonomously.
  • said device 1 when the analyzed motion parameter has not changed for a second threshold time interval T2, said device 1 is configured to send to the second floor button 104 a second signal to move the car to a second floor position, and when the analyzed current car position s(t) has not changed for a third threshold time interval T3, said device 1 is configured to send, e.g., to said cloud server 200, said failure signal to signal a failure of the lift system 100.
  • said signal converter module 6 is electrically connectible by means of a first electrical connection 7 to a first floor first button 103 of a car button panel 105 in parallel with said second electrical connection 104.
  • said device 1 is configured to send to said first floor first button 103 a first signal to move the car (101) to a first floor position.
  • said at least one car movement parameter is at least either a car acceleration, a car pressure and/or a shaft pressure and a car position.
  • said sensor module 2 comprises at least one of either an accelerometer 9 configured to detect said car acceleration, a pressure sensor 10 configured to detect said shaft pressure and/or car pressure, a position sensor 3 to detect over time said car position of said 101 between said plurality of floors by communicating with a reference position indicating device 106 arranged at a reference floor of said plurality of floors.
  • said accelerometer 9 is configured to detect car accelerations and/or car vibrations when said car 101 is in motion along said shaft.
  • said accelerometer 9 is configured to detect car door vibrations when said at least one car door 102 is moving relative to said car door 101.
  • said at least one accelerometer 9 is configured to detect shaft vibrations when said car 101 and said at least one car door 102 are stopped relative to said shaft.
  • said at least one accelerometer 9 comprises at least one MEMS accelerometer sampled between 1Hz and 150 HZ, preferably 100 Hz.
  • said at least one accelerometer 9 comprises at least one MEMS accelerometer sampled between 100 Hz and 1 kHz, preferably 200 Hz.
  • said position sensor 3 is a magnetometer and said reference position signaling device 106 is a magnet fixed to a floor door of said reference floor of said plurality of floors, preferably a ground floor, to detect the current car position of said car 101 relative to said magnet 106.
  • said sensor module 2 comprises a temperature sensor configured to detect the temperature in said shaft and/or in said cab. According to an embodiment, said temperature sensor is integrated into said pressure sensor 10.
  • said signal converter module 6 is electrically connectible to an alarm button 107 of said car button panel 105 by means of a third electrical connection 11 and/or a car roof alarm button so that when said alarm button 107 is activated, said sensor module 3 is configured to send an alarm signal to said cloud server 200.
  • said signal converter module 6 is electrically connectible by means of a fourth electrical connection 12 to a maintenance button 108 of said car button panel 105 and/or a car roof maintenance button such that when said maintenance button 108 is activated, said sensor module 3 is configured to send a performed maintenance signal to said cloud server 200.
  • said processing unit 4 is configured to measure the running comfort of the users by evaluating the lifting and acceleration speed.
  • said processing unit 4 is configured to count the number of trips of said car 101. According to an embodiment, said processing unit 4 is configured to determine the average time of each car trip. According to an embodiment, said processing unit 4 is configured to calculate the total distance of trips recorded in a time interval of interest. According to an embodiment, said processing unit 4 is configured to determine a peak time of traffic/use of the lift system. According to an embodiment, said processing unit 4 is configured to detect the temperature and humidity of a shaft. According to an embodiment, said processing unit 4 is configured to control a number of opening and closing cycles of at least one car door.
  • said device 1 is configured to evaluate a damage sustained by a structure or building comprising the car travel shaft following and during an earthquake.
  • said device 1 is configured to provide a statistical analysis of a drift of said building. According to an embodiment, said device 1 is configured to provide a statistical analysis of the basic building accelerations. According to an embodiment, said device 1 is configured to provide a statistical analysis related to exceeding thresholds of disturbance to people, and exceeding thresholds of non-structural damage to the building.
  • said device 1 comprises a memory unit to store the parameters of the step of the configuration of the described method, and the values of the detected and analyzed car motion and/or system vibrational parameters.
  • the present invention further relates to a fault detection kit 20 for a lift system 100.
  • Said kit 20 comprises at least one fault detection device 1 according to at least one of the previously described embodiments.
  • Said fault detection device 1 is connectible to said car 101, preferably on a roof of said car 101 near said at least one car door 102.
  • said kit 20 comprises at least one reference position signaling device 106 of a reference floor of said plurality of floors, preferably a ground floor, which can be installed at a floor door of said reference floor.
  • said at least one reference position signaling device 106 is a magnet.
  • said fault detection kit 20 comprises at least one motor accelerometer 109 installable at a motor 112 of said lift system 100 to detect vibrations of said motor 112.
  • Said fault detection kit 20 comprises at least one guide sensor 110 associable with at least one guide 111 along which said 101 is running, wherein said at least one guide sensor 110 comprises at least one guide inclinometer and/or at least one guide accelerometer.
  • the present invention further relates to a lift system 100.
  • Said lift system 100 comprises at least one car 101 movable in a shaft between a plurality of floors, said car 101 being provided with at least one car 102 and each floor of said plurality of floors being provided with at least one floor door, wherein said car 101comprises a car button panel 105 comprising at least a second floor second button 104.
  • Said lift system 100 comprises at least one fault detection device 1 according to one of the previously described embodiments.
  • Said at least one fault detection device 1 is fixed to said car 101 and electrically connected to at least said second floor button 104.
  • said system comprises at least one guide 111 and said car 101 runs along said at least one guide 111, said guide being mounted inside the travel shaft in which car 101 is movable.
  • said at least one guide is at least two guides parallel and facing opposite parts of the travel shaft. Said guides are configured to drive the up and down travel of the car through a rope actuation or hydrodynamic cylinders.
  • said system comprises at least one guide sensor 110 which can be associated with said at least one guide 111 along which said car 101 runs.
  • Said at least one guide sensor 110 comprises at least one guide inclinometer, preferably a triaxial MEMS inclinometer, and/or at least one guide accelerometer, preferably a triaxial MEMS accelerometer.
  • said at least one guide sensor 110 is mounted on a board PCB connected to a data bus, preferably of the CAN or WI-FI type, which also comprises a power cable, connected to a control unit.
  • said at least one guide sensor 111 comprises a microprocessor fitted on said board PCB.
  • said guide accelerometer comprises a high-frequency accelerometer and a low-frequency guide accelerometer.
  • said low-frequency accelerometer has a sampling frequency between 1 Hz and 150 Hz for structural monitoring.
  • said high-frequency accelerometer has a sampling frequency between 1Hz and 1KHz, preferably 200 Hz, for monitoring vibrations transmitted to the guides 111.
  • said fault detection device 1 is in data communication with the control unit to which the driving sensors are connected.

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  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
EP22196190.7A 2021-10-01 2022-09-16 Procédé de détection de défaillance pour un système d'ascenseur, dispositif de détection de défaillance, kit de détection de défaillance, système d'ascenseur Pending EP4159658A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102021000025265A IT202100025265A1 (it) 2021-10-01 2021-10-01 Metodo di rilevazione guasti per un impianto ascensore, dispositivo di rilevazione guasti, kit di rilevazione guasti, impianto ascensore

Publications (1)

Publication Number Publication Date
EP4159658A1 true EP4159658A1 (fr) 2023-04-05

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EP22196190.7A Pending EP4159658A1 (fr) 2021-10-01 2022-09-16 Procédé de détection de défaillance pour un système d'ascenseur, dispositif de détection de défaillance, kit de détection de défaillance, système d'ascenseur

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EP (1) EP4159658A1 (fr)
CN (1) CN115924673A (fr)
IT (1) IT202100025265A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9926170B2 (en) * 2012-10-30 2018-03-27 Inventio Ag Movement-monitoring system of an elevator installation
WO2018073484A1 (fr) * 2016-10-20 2018-04-26 Kone Corporation Système d'ascenseur et procédé d'observation d'un dysfonctionnement
CN106006263B (zh) * 2016-05-31 2018-06-29 沃克斯电梯（中国）有限公司 一种电梯监控方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9926170B2 (en) * 2012-10-30 2018-03-27 Inventio Ag Movement-monitoring system of an elevator installation
CN106006263B (zh) * 2016-05-31 2018-06-29 沃克斯电梯（中国）有限公司 一种电梯监控方法
WO2018073484A1 (fr) * 2016-10-20 2018-04-26 Kone Corporation Système d'ascenseur et procédé d'observation d'un dysfonctionnement

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CN115924673A (zh) 2023-04-07
IT202100025265A1 (it) 2023-04-01

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