EP2489621A1 - Verfahren zum Bestimmen und Anzeigen einer Stockwerkhöhenangabe - Google Patents

Verfahren zum Bestimmen und Anzeigen einer Stockwerkhöhenangabe Download PDF

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Publication number
EP2489621A1
EP2489621A1 EP11154916A EP11154916A EP2489621A1 EP 2489621 A1 EP2489621 A1 EP 2489621A1 EP 11154916 A EP11154916 A EP 11154916A EP 11154916 A EP11154916 A EP 11154916A EP 2489621 A1 EP2489621 A1 EP 2489621A1
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EP
European Patent Office
Prior art keywords
vibration pattern
acceleration
floor
lift car
travel
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.)
Withdrawn
Application number
EP11154916A
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English (en)
French (fr)
Inventor
Lars Odlén
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SafeLine Europe
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SafeLine Europe
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 SafeLine Europe filed Critical SafeLine Europe
Priority to EP11154916A priority Critical patent/EP2489621A1/de
Publication of EP2489621A1 publication Critical patent/EP2489621A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B66B1/3492—Position or motion detectors or driving means for the detector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
    • B66B3/02—Position or depth indicators

Definitions

  • the present invention relates to a method for determining and displaying a floor level indication, indicating a floor at which a lift car is positioned in a lift shaft.
  • Such a method is generally known and used for indicating to a user at which floor a lift car is positioned in a lift shaft.
  • the floor level is indicated visually and/or by a spoken information. Indicating the floor level at which the lift car is at, also provides to the user an indication on the time to wait until the lift car arrives at the floor on which they currently are waiting.
  • a problem is however how to obtain the floor signals and how to forward them to the floor level indicators.
  • the interface and the wiring is generally adapted to include such indicators.
  • the problem on the one hand is how to obtain position information, because the lift controller might not provide such output signals, and on the other hand how to transmit those signals to the indicators, because there might not be any spare wires.
  • auxiliary position device can be fitted on the lift car to provide the desired position signals.
  • Such device can for instance be a rotary encoder, or a magnetic strip fitted along the shaft. In both cases, the devices are rather expensive and time consuming in installation.
  • a rotary encoder is used, a dented belt is preferred, because it eliminates the rope slip between the rope and the encoder pulley, which could offset the detected position value.
  • the use of an accelerometer enables an easy and reliable manner to determine which acceleration/deceleration the lift car has been subjected to.
  • the acceleration/deceleration value generated by the accelerometer enables an easy determination of the travelled distance.
  • the acceleration/deceleration value is a vector value, its direction enables to determine in which direction the lift car travels.
  • the new floor reached by the lift car can be determined and displayed.
  • the substitution of the starting floor level by the appertaining floor level enables to update the starting floor level indication. In such a manner, the correct starting floor value is available for the next travel of the lift car, hence offsetting eventual drift or detection errors.
  • wireless transmission is possible so that no additional wiring is required.
  • a first preferred embodiment of a method according to the present invention is characterised in that said measuring of said acceleration/deceleration is realised by measuring a vertical acceleration/deceleration component of an acceleration signal generated by said accelerometer. Since the lift car moves in a vertical direction, it is sufficient to measure the vertical acceleration/deceleration component.
  • a second preferred embodiment of a method according to the present invention is characterised in that said detection of said acceleration is realised by detecting a first moment at which said acceleration starts and a second moment at which said deceleration stops, and by determining the time period between said first and said second moment.
  • said detection of said acceleration is realised by detecting a first moment at which said acceleration starts and a second moment at which said deceleration stops, and by determining the time period between said first and said second moment.
  • a third preferred embodiment of a method according to the present invention is characterised in that a list of floors to be served by said lift is determined upon installation of said lift, said list being stored in said memory, and wherein said attributing of said appertaining floor level indication is realised by comparing said determined destination floor with said list of floors and selecting among said floors, stored in said list, the one corresponding best with said determined destination.
  • the use of a list of floors/floor-levels to be served enables to compare the determined destination floor-level with existing stored floor levels and thus a verification of the determined destination floor.
  • said accelerometer generated floor values are calibrated.
  • said accelerometer generated floor values are calibrated.
  • a fourth preferred embodiment of a method according to the present invention is characterised in that said acceleration signal is filtered in order to reduce a low frequency drift.
  • said acceleration signal is filtered in order to reduce a low frequency drift.
  • an initial vibration pattern generated by said accelerometer during normal travelling of said lift car in said lift shaft, is recorded and stored in said memory, said method further comprising a monitoring program comprising a selection of a travel executed by said lift car and the recordings of a travel vibration pattern generated by said accelerometer during said selected travelling, said monitoring program further comprising a comparison (signature analysis) between said initial and said current travel vibration pattern in order to determine a deviation value between said initial and said travel vibration pattern and generating an alarm signal if said deviation value exceeds a predetermined level.
  • a maintenance service can be alerted before serious problems could occur.
  • a lift car 2 moves up and down in a lift shaft 1.
  • a lift car 2 moves up and down in a lift shaft 1.
  • a lift shaft 1 For the sake of clarity only two floors F0 and F1 have been illustrated, but it will be clear that the present invention is not limited to a method where only two floors can be determined and displayed.
  • a first display 3 is mounted, whereas a second display 4 is mounted, for example above the door 7, at each floor level.
  • An accelerometer 5 is mounted, for example on top of the lift car roof.
  • the accelerometer is provided for measuring the movement imposed by the motor 8 on the lift car 2.
  • the accelerometer is connected to a data processing device 6.
  • the data processing device is provided with a transmitter-receiver in order to send and receive signals to the accelerometer 5 and the displays 3 and 4.
  • the data processing device further comprises a microprocessor and a memory.
  • Figure 2 illustrates by means of a flow chart the different steps of the method for determining and displaying a floor indicator in a lift car.
  • the method is executed under control of the microprocessor.
  • the method is started (10) when for example the movement (11, Accel?) of the lift car takes place, but preferably allows for pre-trigger analysis.
  • the door 7 will be closed, the motor 8 will start running in order to impose either an upward or a downward travel on the lift car, depending on the current floor on which the lift car is and the selected floor to which the user wants to go.
  • the motor will thus impose an acceleration on the lift car, which acceleration will be detected by the accelerometer 5.
  • the accelerometer will now measure the acceleration imposed on the lift car and generate an acceleration signal. As the lift moves either upwards or downwards it is sufficient to measure the vertical acceleration component of the acceleration signal.
  • the microprocessor now receives the acceleration signal generated by the accelerometer.
  • Figure 3a illustrates an example of such an acceleration signal.
  • the signal has a distinctive acceleration, a steady state constant speed phase followed by a deceleration peak for braking the lift car when it reaches its destination floor.
  • the microprocessor will now sample (12) the accelerator signal and measure (13) the sampled signal in order to determine (14) an acceleration value ( ⁇ a).
  • the microprocessor will preferably also detect (13) a first moment (t 1 ) at which the acceleration starts and a second moment (t 2 ) at which said acceleration stops.
  • the microprocessor will now determine (15) the distance ( ⁇ d) travelled by the lift car. This is for example realised by first mathematically integrating the acceleration value ( ⁇ a) over the time period ( ⁇ T) in order to obtain the speed ( figure 3b ) and integrating this speed again over the time period in order to obtain the distance ( ⁇ d; figure 3c ).
  • the microprocessor will read (16) in the memory the stored starting floor indication (AcF) indicating the floor level at which the travel of the lift car started. Based on this starting floor level indication (AcF) and the determined distance ( ⁇ d), the microprocessor will determine (AcF + ⁇ d) the destination floor (PrF) at which the lift car was moved as a consequence of the acceleration/deceleration imposed on the lift car. Once the destination floor (P r F) is determined it will be displayed (17) under control of the microprocessor on both the displays 3 and 4. For this purpose the microprocessor will attribute on the obtained value AcF + ⁇ d an appertaining floor indication, for example by using a list of floors to be served, this list being stored in the memory. The microprocessor will also substitute (18) in the memory the stored starting floor level indication by the determined appertaining floor indication, in order to have the starting floor level indication, stored and to enable a correct determination for a subsequent travel of the lift car. The program loop will then be finished (19).
  • a list of floors to be served is stored in the memory.
  • the storage of this list of floors is preferably realised upon installation of the lift.
  • the floor indicators of each floor the lift serves are sequentially stored in the memory. Due to the presence of this list of floors, the microprocessor when attributing the appertaining floor indication, will compare the determined destination floor (AcF + ⁇ d) with the floor indicators in the list and select among the latter the one corresponding with the determined destination floor. In such a manner a well defined floor indication will always be displayed.
  • the acceleration signal is preferably high-pass filtered.
  • the determination of the first and second moment at which the acceleration starts, respectively stops is realised by monitoring the acceleration signal in order to observe a positive or negative value in the single integration over a time longer than one second.
  • the floor displays 3 and 4 are preferably pre-programmed with the number of floors corresponding to the one in the list. This simplifies the transmission from the processing device 6 to the displays.
  • the floor reference value is preferably re-calibrated when the determined destination floor corresponds to either the lowest or the highest ranked floor in the list. For this purpose the maximum, respectively the minimum value obtained when determining (AcF+ ⁇ d) the starting floor level indication is set to a corresponding predetermined value.
  • the fact that the lift car is equipped with an accelerometer has a further advantage in that it can be used for monitoring the functioning of the lift car.
  • the generated acceleration signal shows a vibration pattern as illustrated in figure 5, where the x, y and z components of the acceleration signal, generated by the accelerometer are illustrated for a downward travel.
  • the vibration pattern will be determined by different components of the lift such as the motor, the rope, the speed, the load, the position in the shaft and wear on mechanical components.
  • the vibration pattern will quantify the quality of the installation as a whole.
  • the microprocessor can also perform a reasonable advanced vibration analysis on a lift, how it can determine out-of-ordinary events and how such an event can create an alarm or alert to a remote location.
  • the same processing device can also track long-term changes to the lift, such as wear or gradual deterioration.
  • the application described can be integrated in a lift emergency telephone and uses the existing processing, storage and communication resources. The additional cost for the described continuous vibration monitoring functions is therefore small. It should however be noted, that a device following the data gathering and analysing principles here described can be incorporated in other lift related products, or be functioning as a stand alone device. What is said here also applies to the monitoring of escalators and moving walk-ways the demands being a sub set of the lift (fewer operational states).
  • the lift behaves differently depending on its operational state.
  • Such states can be : idling (standing still), re-levelling, loading, offloading, doors opening, doors closing, starting, stopping, accelerating, decelerating and running at nominal speed.
  • vibration pattern Each of such states has a different vibration pattern.
  • This vibration pattern would also have its distinctive pattern and acceptance limits for normal, relative to abnormal behaviour. Changes in vibration pattern come either as a gradual deterioration as components wear, or as a sudden change in case of immediate failure.
  • the vibration information such as present in the vibration pattern is firstly used to determine the state the lift is in (state band). For example for each state the maximum vibration is compared to a maximum allowed value.
  • an initial vibration pattern was generated representing a normal travelling of the lift car.
  • the initial vibration pattern is stored in the memory.
  • a monitoring program will be executed by the processing device in order to monitor the functioning of the lift.
  • This maximum allowed value is determined as a multiplicator of the value of the initial pattern.
  • This initial pattern typically represents the lift as new or in good shape and is preferably averaged over a considerable time before being stored as initial pattern.
  • the recorded values are also used to generate a rolling average seen as "current" status.
  • This "average” is quantified on a discrete scale, and the values are stored with day stamps (day n, day n - 1, etc), hence avoiding clock synchronisation issues.
  • the three values from each state band, as described above, are used for reporting and for alerting or alarming, depending on the graveness of the fault.
  • the digitised raw data is stored in a memory functioning as a ring buffer, which allows pre and/or post trigger data to be analysed.
  • the start of the run or journey of the lift car is preferably considered as the trigger and is determined by a maintained speed integral over several seconds. This prevents load and offload jerks to be seen as false starts.
  • Other events such as the opening of the door or the activation of a floor selection button could also be used for triggering the monitoring program.
  • the start of the journey as a trigger of the monitoring program has the advantage of providing a reliable solution.
  • the accelerometer when the lift car starts to run the accelerometer outputs an acceleration signal which can then be integrated over a period of more than one second, as the lift car travels for more than one second even if only one higher floor level has to be reached.
  • the continuous character of the acceleration signal contributes also to a reliable integration over a period of more than one second.
  • the stop of the travel can also be reliably detected as the continuous character of the signal has disappeared.
  • the determined start By the use of the determined start as the trigger, data preceding the start can be analysed in a pre-trigger mode.
  • events leading up to the start such as door operation, loading or offloading can be precisely analysed without the need for additional sensors or signals, from for instance door contacts.
  • a lift typically runs some tens of seconds, and thereafter idles for minutes or hours. Hence there is seldom need to perform the data analysis in real time, but merely to record the journey into the ring buffer. Should multiple journeys occur before the data was analysed, the older gets overwritten. If the lift continued to run, there was presumably not much information lost. In the event of a breakdown, the lift is at stand still and no consecutive data is being generated, so the ring buffer does not get overwritten. Data analysis can then be made of the events leading up to the breakdown.
  • the execution of the monitoring program further comprises a selection of a travelling executed by said lift car and a recording of a travel vibration pattern generated by said accelerometer during said selected travelling.
  • the monitoring program is preferably started by the starting of the travelling of the lift car, as this can be reliably determined as described here before. However alternative solutions such as the activation of a floor level selection key could also start the monitoring program.
  • the monitoring program further comprises a comparison between the initial travel pattern stored in the memory and the recorded travel vibration pattern in order to determine a first deviation value between said initial and said travel vibration pattern. When the comparison results in the fact that the first deviation value exceeds a first predetermined amount, an alarm signal is generated.
  • an initial pre-travel respectively post-travel vibration pattern generated by the accelerometer during a pre-travel period preceding respectively a post-travel period following a normal travelling of the lift car in the lift shaft is recorded and stored in the memory. What period the pre- and post-travel vibration pattern will cover will depend on when the travel pattern used in the monitoring program begins and starts and which parameters have to be monitored. So for example the pre- and post-travel vibration pattern could cover the period between the opening, respectively the closing of the door and the start, respectively the stop of the journey.
  • the method comprising a continuous recording of a travel vibration pattern generated by said accelerometer and a storage of said recorded travel vibration pattern into the memory.
  • the memory is preferably a ring buffer memory which allows an overwriting of stored data.
  • the method also comprises a pre-travel respectively a post-travel monitoring program triggered by said monitoring program and comprising an identification among the recorded travel vibration pattern stored in said memory of that first respectively second fragment of the recorded travel vibration pattern which preceded respectively followed said selected travelling during an execution of said monitoring program.
  • the identification of the concerned fragment is for example realised on the basis of a time criteria such as for example all the data present one minute before the journey selected by the monitoring program started. Once the concerned fragment is identified, the latter is read out of the memory.
  • the pre-travel respectively post-travel monitoring program further comprises a comparison between said initial pre-travel respectively post-travel vibration pattern and said first respectively second fragment in order to determine a second respectively third deviation value between said initial pre-travel respectively post-travel vibration pattern and said first respectively second fragment and generating said alarm signal if said second respectively third deviation value exceeds a second respectively third predetermined amount.
  • the second and third predetermined amount is either of the same value or has a different value.
  • the monitoring programs are generally realised by the processing device, a relatively simple microprocessor such of the emergency telephone could perform reasonably advanced vibration data analysis.
  • the data in the ring buffer that represents the state where the exception occurred gets stored in a reporting memory.
  • This data can be accessed from remote and downloaded as a sound file. Practically it works so that the device in the lift, sends a ticket stating the fault with details of the anomaly.
  • Such ticket can for instance be: Lift 12345678, A321 (meaning; excessive vibration at door closing).
  • the office or a service technician can later call up the remote device and listen to the noise pattern or download it into a computer.
  • This downloaded file can then be analysed with for instance powerful Fourier transformation algorithms, in order to more precisely determine the cause of failure.
  • the invention can also include a self verification function.
  • the monitoring program could be executed by each travelling of the lift car, it is sufficient to execute the monitoring program for a selected number of travels.
  • the data processing device will compare the measured vibration pattern with the stored initial pattern and depending on the predetermined maximum allowed value determine, a duration between the initial and the recorded travel vibration pattern. If the deviation exceeds a predetermined amount, an alarm signal will be generated by the data processing device.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
EP11154916A 2011-02-17 2011-02-17 Verfahren zum Bestimmen und Anzeigen einer Stockwerkhöhenangabe Withdrawn EP2489621A1 (de)

Priority Applications (1)

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EP11154916A EP2489621A1 (de) 2011-02-17 2011-02-17 Verfahren zum Bestimmen und Anzeigen einer Stockwerkhöhenangabe

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EP11154916A EP2489621A1 (de) 2011-02-17 2011-02-17 Verfahren zum Bestimmen und Anzeigen einer Stockwerkhöhenangabe

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105984764A (zh) * 2015-02-27 2016-10-05 株式会社日立制作所 电梯装置
EP3081519A1 (de) 2015-04-16 2016-10-19 Kone Corporation Verfahren zur positionserkennung einer aufzugskabine
EP3008007B1 (de) 2013-06-13 2017-03-29 Inventio AG Bremsverfahren für eine personentransportanlage, bremssteuerung zur durchführung des bremsverfahrens und personentransportanlage mit einer bremssteuerung
CN109205422A (zh) * 2017-06-30 2019-01-15 奥的斯电梯公司 电梯加速度计传感器数据使用
CN110606419A (zh) * 2018-06-15 2019-12-24 奥的斯电梯公司 输送***振动特征的监测
EP3632830A1 (de) * 2018-10-04 2020-04-08 Otis Elevator Company Aufzugskabinenpositionsbestimmung
CN111071878A (zh) * 2018-10-18 2020-04-28 奥的斯电梯公司 电梯轿厢调平传感器
EP3670415A3 (de) * 2018-12-21 2020-07-15 Otis Elevator Company Virtueller sensor zur aufzugsüberwachung
CN111517187A (zh) * 2019-02-04 2020-08-11 奥的斯电梯公司 利用概率的输送设备地点确定
CN112047209A (zh) * 2020-09-09 2020-12-08 上海有个机器人有限公司 一种电梯楼层的自动标定方法、介质、终端和装置
CN112061915A (zh) * 2019-06-11 2020-12-11 无锡智泉科技有限公司 一种非介入式的电梯楼层检测方法
US11639283B2 (en) 2017-06-02 2023-05-02 Inventio Ag Floor position detection device of an elevator installation and method for generating a floor signal
US11767194B2 (en) 2019-01-28 2023-09-26 Otis Elevator Company Elevator car and door motion monitoring

Citations (3)

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Publication number Priority date Publication date Assignee Title
WO2001014237A1 (en) * 1999-08-24 2001-03-01 N.V. Teclion S.A. A device for monitoring an operation of an elevator car
WO2006035101A2 (en) * 2004-09-27 2006-04-06 Kone Corporation Method and system for measuring the stopping accuracy of an elevator car
WO2007144449A1 (en) * 2006-06-13 2007-12-21 Kone Corporation Elevator system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001014237A1 (en) * 1999-08-24 2001-03-01 N.V. Teclion S.A. A device for monitoring an operation of an elevator car
WO2006035101A2 (en) * 2004-09-27 2006-04-06 Kone Corporation Method and system for measuring the stopping accuracy of an elevator car
WO2007144449A1 (en) * 2006-06-13 2007-12-21 Kone Corporation Elevator system

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3008007B1 (de) 2013-06-13 2017-03-29 Inventio AG Bremsverfahren für eine personentransportanlage, bremssteuerung zur durchführung des bremsverfahrens und personentransportanlage mit einer bremssteuerung
CN105984764A (zh) * 2015-02-27 2016-10-05 株式会社日立制作所 电梯装置
EP3081519B1 (de) 2015-04-16 2018-02-21 Kone Corporation Verfahren zur positionserkennung einer aufzugskabine
US10315885B2 (en) 2015-04-16 2019-06-11 Kone Corporation Method for the position detection of an elevator car using an accelerometer and a door sensor
EP3081519A1 (de) 2015-04-16 2016-10-19 Kone Corporation Verfahren zur positionserkennung einer aufzugskabine
CN106044430A (zh) * 2015-04-16 2016-10-26 通力股份公司 用于电梯轿厢的位置检测的方法
US11639283B2 (en) 2017-06-02 2023-05-02 Inventio Ag Floor position detection device of an elevator installation and method for generating a floor signal
EP3431431A3 (de) * 2017-06-30 2019-04-03 Otis Elevator Company Verwendung der sensordaten eines aufzugbeschleunigungsmessers
CN109205422A (zh) * 2017-06-30 2019-01-15 奥的斯电梯公司 电梯加速度计传感器数据使用
US10669121B2 (en) 2017-06-30 2020-06-02 Otis Elevator Company Elevator accelerometer sensor data usage
CN109205422B (zh) * 2017-06-30 2020-10-27 奥的斯电梯公司 电梯加速度计传感器数据使用
CN110606419A (zh) * 2018-06-15 2019-12-24 奥的斯电梯公司 输送***振动特征的监测
EP3626668A1 (de) * 2018-06-15 2020-03-25 Otis Elevator Company Überwachung der schwingungssignaturen eines fördersystems
US11724910B2 (en) 2018-06-15 2023-08-15 Otis Elevator Company Monitoring of conveyance system vibratory signatures
EP3632830A1 (de) * 2018-10-04 2020-04-08 Otis Elevator Company Aufzugskabinenpositionsbestimmung
CN111003618A (zh) * 2018-10-04 2020-04-14 奥的斯电梯公司 电梯轿厢位置确定
CN111071878A (zh) * 2018-10-18 2020-04-28 奥的斯电梯公司 电梯轿厢调平传感器
EP3670415A3 (de) * 2018-12-21 2020-07-15 Otis Elevator Company Virtueller sensor zur aufzugsüberwachung
US11958722B2 (en) 2018-12-21 2024-04-16 Otis Elevator Company Virtual sensor for elevator monitoring
US11767194B2 (en) 2019-01-28 2023-09-26 Otis Elevator Company Elevator car and door motion monitoring
CN111517187B (zh) * 2019-02-04 2023-04-28 奥的斯电梯公司 利用概率的输送设备地点确定
CN111517187A (zh) * 2019-02-04 2020-08-11 奥的斯电梯公司 利用概率的输送设备地点确定
US11649136B2 (en) 2019-02-04 2023-05-16 Otis Elevator Company Conveyance apparatus location determination using probability
CN112061915A (zh) * 2019-06-11 2020-12-11 无锡智泉科技有限公司 一种非介入式的电梯楼层检测方法
CN112061915B (zh) * 2019-06-11 2023-11-07 无锡智泉科技有限公司 一种非介入式的电梯楼层检测方法
CN112047209A (zh) * 2020-09-09 2020-12-08 上海有个机器人有限公司 一种电梯楼层的自动标定方法、介质、终端和装置
CN112047209B (zh) * 2020-09-09 2022-09-13 上海有个机器人有限公司 一种电梯楼层的自动标定方法、介质、终端和装置

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