EP3774630B1 - Verfahren und vorrichtung zum überwachen von eigenschaften einer tragmittelanordnung in einer aufzuganlage - Google Patents

Verfahren und vorrichtung zum überwachen von eigenschaften einer tragmittelanordnung in einer aufzuganlage Download PDF

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Publication number
EP3774630B1
EP3774630B1 EP19712232.8A EP19712232A EP3774630B1 EP 3774630 B1 EP3774630 B1 EP 3774630B1 EP 19712232 A EP19712232 A EP 19712232A EP 3774630 B1 EP3774630 B1 EP 3774630B1
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EP
European Patent Office
Prior art keywords
support means
tensile forces
information
arrangement
properties
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EP19712232.8A
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German (de)
English (en)
French (fr)
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EP3774630A1 (de
Inventor
Christoph Liebetrau
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Inventio AG
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Inventio AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
    • B66B7/1207—Checking means
    • B66B7/1215—Checking means specially adapted for ropes or cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/3415—Control system configuration and the data transmission or communication within the control system
    • B66B1/3446—Data transmission or communication within the control system
    • B66B1/3461—Data transmission or communication within the control system between the elevator control system and remote or mobile stations
    • 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
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
    • B66B7/1207—Checking means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
    • B66B7/1207—Checking means
    • B66B7/1246—Checking means specially adapted for guides

Definitions

  • the present invention relates to a method for monitoring properties of a suspension element arrangement in an elevator system and to a suspension element monitoring device configured to carry out such a method.
  • the invention further relates to a computer program product and a computer-readable medium storing the same.
  • an elevator car In an elevator system, an elevator car is held against gravity and moved along an elevator shaft using a suspension arrangement. In most cases, the suspension arrangement also holds and moves a counterweight.
  • the suspension arrangement typically comprises several elongated suspension elements.
  • the suspension elements can withstand high tensile loads and can be bent transversely to their longitudinal direction.
  • the suspension elements can be, for example, suspension belts or suspension cables.
  • the suspension arrangement can also include other elevator components with the help of which, for example, the suspension elements are fastened within the elevator shaft, the suspension elements and thus the elevator car attached to them are moved and/or the suspension elements are redirected during such a relocation.
  • such other elevator components can include attachment devices with the help of which one of the suspension elements can be attached to a fastening structure in the elevator shaft or to an elevator car to be moved or to a counterweight.
  • the other elevator components can also be roller-like components such as drive pulleys, deflection rollers, guide rollers, etc.
  • Properties of the support elements and the support element arrangement formed from them are designed for use in the elevator system in such a way that safe and reliable operation of the elevator system is always guaranteed under normal operating conditions.
  • a number of support elements in the support element arrangement and a design of the individual support elements are generally designed in such a way that the support element arrangement can easily withstand all loads occurring under normal operating conditions.
  • the suspension arrangement In order to ensure that the physical properties of the suspension arrangement as originally designed are implemented in actual use, it is necessary to ensure that the suspension arrangement is installed and operated in accordance with its design.
  • the suspension arrangement should be installed in such a way that all suspension elements are subjected to mechanical stress in accordance with their specifications and, in general, to the same extent possible.
  • the suspension arrangement should be operated in such a way that situations in which individual suspension elements or other components of the suspension arrangement would be overloaded or subjected to excessive wear are avoided as far as possible.
  • operating conditions that could cause unpleasant or even dangerous situations for passengers in the elevator system should also be avoided as far as possible.
  • a method for monitoring properties of a support means arrangement in an elevator system comprises measuring tensile forces acting on the support means and subsequently deriving change information which indicates changes in the properties of the support means arrangement by analyzing a temporal development of the measured tensile forces.
  • a suspension element monitoring device for monitoring properties of a suspension element arrangement in an elevator system according to claim 9 is proposed.
  • the suspension element arrangement in turn comprises a plurality of suspension elements by means of which an elevator car is to be held and displaced.
  • the suspension element monitoring device is configured to carry out or control a method according to an embodiment of the first aspect of the invention.
  • a computer program product which comprises computer-readable instructions which instruct a computer to carry out or control a method according to an embodiment of the first aspect of the invention.
  • a computer-readable medium having stored thereon a computer program product according to an embodiment of the third aspect of the invention is proposed.
  • the properties of a suspension arrangement of an elevator system should be monitored regularly in order to be able to detect critical changes in these properties in good time and, if necessary, to initiate countermeasures so that situations in which the safety of the elevator system could be endangered can be avoided.
  • the components of the suspension arrangement to be monitored can include not only the multiple suspension elements themselves but also components that interact with these suspension elements.
  • the properties of rollers that deflect the suspension elements should also be monitored.
  • the term "rollers" is used generically here and is intended to include both actively driven rollers in the form of, for example, drive and traction pulleys and passively moving rollers in the form of, for example, deflection rollers.
  • the components to be monitored can also include attachment devices with which the suspension elements can be fixed to supporting structures within the building that houses the elevator.
  • components of the suspension arrangement to be monitored can also be understood to include those components of the elevator system that only indirectly interact with the suspension elements or influence their properties or behavior.
  • Such components can include, for example, guide components such as guide rails installed in the elevator shaft, with the help of which the elevator car is guided during its movement and whose current properties affect the guided car and thus the suspension elements connected to the car and causing the movement.
  • Embodiments of the present invention are based, among other things, on the knowledge that by measuring tensile forces acting on the suspension elements and then specifically analyzing these measured tensile forces, changes in the properties of the suspension element arrangement can also be detected, which cannot be reliably detected using the above-mentioned conventional approach.
  • the approach proposed here is intended to analyze a temporal development of the measured tensile forces.
  • the aim is to analyze how the tensile forces acting on the suspension elements change over time.
  • the tensile forces acting on the suspension elements vary over time in a manner that is characteristic of the respective change in the case of certain changes in the properties of the suspension element arrangement, ie for example in the case of certain defects or signs of wear.
  • an associated variation pattern can exist, whereby the Variation patterns indicate how the respective change leads to temporal variations in the tensile forces acting on the support means.
  • a comparison of the elevator system at a higher level i.e. in a comparison of several elevator systems
  • such variation patterns can be determined particularly precisely. This applies all the more the more data points are available, i.e. the more elevator systems are compared or the longer the time course of the recording is.
  • a central evaluation device i.e. an evaluation device that is external and remote from the individual elevator system and is connected to several elevator systems, enables such a comparison.
  • the elevator car may be desired to drive the elevator car only to a certain floor, for example a top floor of a building with a penthouse apartment that is to be served exclusively by the elevator car, when the elevator car is unoccupied.
  • the weight or force sensors on a support means arrangement that are already provided for other purposes in the elevator system can be used to carry out the method proposed here in order to measure the tensile forces acting on the support means.
  • change information By analyzing the temporal development of the measured tensile forces on the suspension elements, various types of information can be derived, which, as change information, allow conclusions to be drawn about the current state of the suspension element arrangement.
  • the change information does not necessarily have to relate to properties of the suspension elements themselves, but can in particular be directed at properties of elevator components that interact with these suspension elements and/or indirectly influence their function.
  • a surface profiling can be provided on a circumferential surface on a roller such as a traction sheave or a deflection roller.
  • the surface profiling can bring about improved traction between the roller and a support element running over this roller.
  • the surface profiling can guide the support element running over it in a desired manner.
  • the surface profiling can be formed, for example, by a plurality of V-shaped, U-shaped or otherwise contoured grooves on the circumferential surface of the roller, wherein the grooves generally run parallel to the circumferential direction of the roller.
  • the support element interacting with the roller can also have a profiled contact surface on its side facing the circumferential surface of the roller, the surface profiling of which can preferably interact in a complementary manner with the surface profiling of the roller, so that the desired traction and/or lateral guidance can be achieved.
  • worn surface profiling can lead to the surface profiling on the contact surface of the support element no longer permanently interacting in the desired way with the surface profiling on the peripheral surface of the roller in a complementary manner, but the two surface profilings are temporarily offset from one another due to insufficient lateral guidance.
  • the support element that is no longer sufficiently guided laterally can briefly run into the surface profiling of the roller with its surface profiling slightly offset to the side. Since this temporarily changes the effective radius of the roller, short-term force peaks can be caused on the support element that is no longer guided correctly.
  • Such force peaks can have characteristic properties that can be used to identify wear on the surface profiling.
  • an analysis of the temporal progression of such force peaks can even provide information on how the surface profiling is worn, how far the wear has progressed and/or whether the wear affects the surface profiling on the roller, on the support element or on both. Relevant information can be included in the derived change information.
  • the method presented can be used to derive information about wear on a traction surface of a traction sheave driving the suspension element and/or a contact surface of a suspension element interacting with this traction sheave.
  • the traction surface or the contact surface can be specifically designed, for example by forming a microscopic or macroscopic roughness or profile, to achieve the highest possible traction, i.e. power transmission, between the driving traction sheave and the driven suspension element. Traction can be reduced due to wear. This can in turn lead to characteristic changes in the temporal development of the measured tensile forces during the displacement of the suspension elements. For example, A load-bearing element can slip briefly or be transported jerkily due to insufficient traction. This can be accompanied by characteristic force peaks acting on the load-bearing element.
  • Such guide components can, for example, be guide rails that guide the elevator car in a horizontal direction while it is being moved vertically through the elevator shaft. Wear on such guide components can, for example, lead to the elevator car no longer being able to move smoothly in a vertical direction, but instead being inhibited in its vertical movement by, for example, brief excessive rubbing on one of the guide components. This can in turn lead to characteristic force peaks on the support means that move the elevator car. For example, wear on a guide component can lead to vibrations acting in a vertical direction on the elevator car and thus on the support means arrangement.
  • information can be derived about wear on guide structures on a support element and/or on a roller that deflects a support element.
  • the guide structures serve to guide the support element in a suitable manner relative to the roller while it is being displaced and deflected by the roller. Wear on these guide structures can in turn lead to a characteristic change in the temporal development of measured tensile forces acting on the support element.
  • guide structures in the form of beads, where the traction sheave has a locally enlarged diameter can be provided on a traction sheave close to its axial edges.
  • These guide structures can guide a support element in the circumferential direction of the traction sheave and in particular prevent a support element from slipping off the traction sheave in the axial direction. If such a guide structure wears out over time, it can happen that the support element, which is no longer sufficiently guided laterally, briefly runs onto the bead forming the guide structure, causing a temporary force peak on the support element. A temporal progression of such a force peak can in turn be characteristic for the type of wear mentioned.
  • the information mentioned above is influenced not only by the degree of wear but also by the tolerance ranges of the components mentioned above. If the temporal progression of the tensile forces is compared across elevator systems, i.e. in an external and remote evaluation device, this comparison makes it possible to take tolerance-related deviations into account. Based on the temporal progression, categories can be formed in which the change is analyzed in a standardized manner to an initial tolerance. This makes it possible to derive change information that indicates changes in the properties of the suspension arrangement even more reliably.
  • tensile forces acting on each of the support elements are measured and the derivation of the change information is carried out by analyzing a temporal development of the measured tensile forces on the individual support elements.
  • not only a single force measuring sensor can be provided for the suspension arrangement comprising several suspension elements, as would be conventionally sufficient, for example, for measuring the weight of the elevator car.
  • the tensile force currently acting on this suspension element should be able to be measured individually for each or at least many of the suspension elements.
  • an individually assigned force measuring sensor can be provided for all or at least some of the suspension elements, with the help of which the tensile force currently acting on this suspension element can be determined.
  • the tensile forces acting on the various suspension elements at a common point in time can in this case be measured and are then analyzed in order to derive the desired change information regarding the properties in the suspension arrangement.
  • the temporal development of the measured tensile forces on different support elements can be compared.
  • the desired change information does not need to be derived by analyzing a single temporal development of the tensile forces measured, for example, by a single sensor. Instead, measurement results from various sensors are available and indicate the temporal development of tensile forces acting on various support elements of the support element arrangement. By analyzing, i.e. for example comparing, these different temporal developments of tensile forces, additional information can be derived which allows conclusions to be drawn about the type and/or extent of changes in the properties of the support element arrangement.
  • force peaks that act on all the suspension elements in a suspension arrangement at the same time and are therefore measured by the various sensors at the same time can indicate that the cabin as a whole is moving and that temporary accelerations are being caused, for example due to local friction on guide components.
  • force peaks are only measured on one or a few of the suspension elements in a suspension arrangement, this can indicate that the suspension element(s) in question are subject to excessive wear.
  • the change information can be derived by analyzing a gradient of the temporal development of the measured tensile forces, analyzing a frequency spectrum of the temporal development of the measured tensile forces and/or analyzing an amplitude of the temporal development of the measured tensile forces.
  • the measured tensile forces can be analyzed in terms of how quickly the tensile forces change over time, ie how steep a time-related Gradient of the time-varying tensile forces.
  • Very rapidly changing tensile forces can indicate jerky movements of the suspension elements, which can be characteristic of certain changes in the properties of the suspension element arrangement.
  • the way in which the gradient of the time-varying tensile forces changes over time can also be characteristic of certain changes occurring within the suspension element arrangement.
  • the measured tensile forces can be analyzed in terms of how their frequency spectrum behaves. Any change in tensile forces can be interpreted as a superposition of periodically occurring tensile forces, so that a temporal profile of the changing tensile forces can be represented in the form of a frequency spectrum.
  • the changing tensile forces can be analyzed using a Fourier transformation.
  • the way in which the measured tensile forces change over time, and thus the associated frequency spectrum can be characteristic of a certain change in the properties of the suspension arrangement, so that different changes in such properties can be recognized qualitatively and/or quantitatively based on their characteristic frequency spectra and thus differentiated.
  • the extent, i.e. the amplitude, of tensile forces changing over time can also enable a conclusion to be drawn about the causal change in the properties of the suspension arrangement.
  • measured values obtained by measuring the tensile forces can be transmitted to an external evaluation device located remotely from the elevator system and the derivation of the information can be carried out in the evaluation device.
  • the evaluation device can be arranged externally and remotely from the elevator system.
  • External and remote means in the preceding and following outside the elevator system, in particular outside the building in which the elevator system is located.
  • An external and remote evaluation device can be used for two or more elevator systems, i.e. as a centralized evaluation device. This not only saves on evaluation devices, but also means that the data from multiple elevator systems is available in one central location. This in turn makes it possible to derive change information that indicates changes in the properties of the suspension element arrangement by analyzing a temporal development of the measured tensile forces based on comparisons across systems. This increases the reliability of deriving change information.
  • An external and remote evaluation device thus makes it possible to obtain better information about the condition of the suspension elements from the comparison of a large number of temporal profiles of tensile forces in suspension elements of different elevator systems.
  • the analysis of the tensile forces acting on the support means does not necessarily have to be carried out using a device contained in the elevator system, such as an elevator control or a locally provided evaluation device.
  • a device contained in the elevator system such as an elevator control or a locally provided evaluation device.
  • the measured tensile forces can be transmitted to an external and remotely located evaluation device outside the elevator system and analyzed there in order to ultimately derive the change information.
  • the external evaluation device can, for example, be provided in a remote monitoring center, with the help of which, for example, many different elevator systems can be monitored.
  • the external evaluation device can be designed using computers that are part of a data cloud.
  • the evaluation device can, for example, be connected to data-providing components of the elevator system via a network of the so-called "Internet of Things" (IoT). Data or signals that reflect the tensile forces measured by measuring sensors can be transmitted between the elevator system containing the measuring sensors and the external evaluation device via Data transmission devices can be used, for example, to transmit the data wired or wirelessly.
  • IoT Internet of Things
  • the evaluation of the data in the data cloud enables the reliable derivation of change information, which indicates changes in the properties of the suspension element arrangement, based on data from a large number of measurements from a large number of elevator systems.
  • change information which indicates changes in the properties of the suspension element arrangement
  • the subsequent updating of this list of known changes in a large number of individual evaluation devices integrated in the elevator system is no longer necessary.
  • the derivation of change information is therefore improved and simplified by the external and remote evaluation device.
  • a notification signal in the event that the derived change information indicates changes in the properties of a suspension arrangement according to which an inspection of the elevator installation is required, a notification signal can be issued.
  • a corresponding notification signal can be issued if it can be recognized from the previously derived change information that changes have taken place in the suspension arrangement that make an inspection of the elevator system necessary.
  • the notification signal can be transmitted to a maintenance technician, for example.
  • the maintenance technician can be informed as needed when an inspection of the elevator system appears necessary.
  • the maintenance technician can therefore inspect the elevator system in good time, for example before serious damage occurs or its safe operation is endangered.
  • unnecessary inspections can be avoided.
  • the notification signal may contain indication information regarding the derived change information about changes in the properties of a suspension element arrangement.
  • the notification signal can not only inform a technician that an inspection appears necessary, but can also provide the technician with additional information about the extent to which the properties of the suspension arrangement have changed to such an extent that it should be inspected. Using this additional information, the technician can, for example, plan his inspection better, obtain spare parts in advance if necessary and/or estimate the effort required for the inspection. Such information can be continuously refined effortlessly with an external and remote evaluation device due to the large amount of data from different elevator systems.
  • the sensors by means of which the tensile forces acting on the suspension elements are to be measured can each be integrated into a trailer device, wherein the trailer device is configured to attach at least one of the suspension elements to a fastening structure.
  • the force measuring sensors can be integrated directly into a suspension device in a space-saving and/or cost-saving manner.
  • the suspension device can be structurally designed to fix one or more support means to the fastening structure to which the support means are to be attached.
  • the fastening structure can be, for example, a supporting structure of a building housing the elevator system.
  • a fastening structure can be provided on the elevator car and/or the counterweight.
  • the suspension device typically works together with an end region of a support means in order to attach this end region, for example, to a supporting elevator shaft ceiling or to the elevator car and the counterweight.
  • Embodiments of the method described herein can be implemented or controlled using a computer or a programmable controller or evaluation device.
  • a computer program product can be used to suitably instruct the computer or the controller or evaluation device.
  • the computer program product can be formulated in any computer-readable language.
  • the computer or the controller and evaluation device can have the necessary hardware, in particular a processor for processing data relating to the measured tensile forces, a memory for storing such data and/or interfaces for inputting or outputting such data.
  • the computer program product may be stored on any computer-readable medium such as a flash memory, a CD, a DVD, RAM, ROM, PROM, EPROM, etc.
  • the computer program product may also be stored on one or more servers from which it can be downloaded via a network, in particular via the Internet.
  • the server may be part of a data cloud.
  • Fig.1 shows an elevator installation with a suspension element monitoring device for carrying out a method according to an embodiment of the present invention.
  • Fig.1 shows an elevator system 1 in which an elevator car 5 and a counterweight 7 can be moved vertically within an elevator shaft 3 using a support means arrangement 9.
  • the support means arrangement 9 has several support means 11 in the form of ropes or belts. In the 2:1 configuration shown, the support means 11 are suspended at their ends via suspension devices 21 from a ceiling of the elevator shaft 3. Alternatively, in a 1:1 configuration, the support means 11 could also be suspended at their ends via a suspension device on the elevator car 5 or the counterweight 7.
  • the support means 11 can be driven via a traction sheave 15 driven by a drive machine 13 and, if necessary, deflected via deflection rollers 17, which can be attached to the elevator car 5 and/or to the counterweight 7, among other things.
  • the traction sheave 15 and the deflection rollers 17 can be referred to generically below as rollers 16. What they have in common is that they interact with one or more of the support elements 11 of the support element arrangement 9 and generally divert their course. Operation of the drive machine 13 can be controlled by an elevator control 19.
  • the elevator system 1 shown contains several sensors 29, with the help of which tensile forces acting on the support means 11 can be measured. Measurement results can be transmitted by wire or wirelessly to an evaluation device 25 using a data transmission device 23 and analyzed there with regard to a temporal development of the measured tensile forces in order to be able to derive desired change information from them.
  • the evaluation device 25 can be part of the elevator system 1. Alternatively, the evaluation device can be provided externally and remotely from the elevator system 1.
  • the sensors 29, together with the evaluation device 25, form a support means monitoring device 27.
  • Fig.1 2 areas outlined in dashed lines are enlarged and rotated by 90° in order to show details of a support means 11 interacting with the traction sheave 15 on the one hand and details of a possible design of a trailer device 21 on the other hand.
  • the support means 11 is designed as a belt.
  • the belt On a lower side, the belt has V-shaped longitudinal grooves that form a surface profile.
  • the belt nestles against a traction surface 47, which is formed by a peripheral surface of the drive pulley 15.
  • the traction surface 47 is also designed with a surface profile 45 that is essentially complementary to the surface profile of the belt.
  • the drive pulley 15 On opposite axial edges, the drive pulley 15 has bead-like side guide structures 49.
  • the side guide structures 49 are formed by areas of the drive pulley 15 with an increased radius and steep side flank, so that the support means 11 is guided laterally by the two side guide structures 49 and is prevented from axially sliding off the drive pulley 15.
  • the attachment device 21 serves to attach several of the support means 11 contained in a support means arrangement 9 to a fastening structure 39, such as, in the case shown, a ceiling of the elevator shaft 3.
  • the individual support means 11 are each accommodated in a loop-like manner in a clamping device 31 in which they are held in a force-fitting manner by a clamping effect of a wedge 32.
  • Each of the clamping devices 31 is connected to a associated spring 35, via which the tensile force caused by the support means 11 is ultimately transmitted to a pressure plate 37.
  • a sensor 29 is provided, via which the force exerted by the pressure plate 37 can be measured and thus the tensile force exerted by the associated support means 11 can be determined.
  • the tensile forces acting on the support means 11 can be measured using suitably designed and positioned sensors 29.
  • the tensile forces measured by the sensors 29 can be analyzed with regard to their development over time. This makes it possible to derive change information which can, for example, contain information about wear on the surface profile 45 or on the traction surface 47.
  • the support element 11 may no longer be guided correctly in relation to the traction sheave 15, but may temporarily move slightly in the axial direction of the traction sheave 15, and the surface profiling of the support element 11 may be offset laterally in relation to the surface profiling 45 of the traction sheave 15 and may run up against it.
  • This may result in the support element 11 appearing to be driven briefly by a traction sheave 15 with a larger radius and thus being conveyed at a higher circumferential speed, so that forces on the support element 11 temporarily increase. As soon as the support element 11 with its surface profiling slides back into its correctly guided position, these forces are reduced again.
  • the increase and subsequent decrease of the tensile forces on the support means 11 can be characteristic of the lateral displacement of the support means 11 relative to the traction sheave 15 with regard to a gradient, a frequency spectrum and/or an amplitude of the temporal development of the tensile forces, so that by suitable analysis of this Sizes can be used to determine the type and/or extent of wear of the surface profiling 45.
  • wear on the traction surface 47 can be inferred if such wear leads, for example, to a reduced frictional force between the traction surface 47 of the traction sheave 15 and the contact surface of the support means 11 adjacent thereto and this reduced frictional force leads, for example, to a brief, jerky slipping of the support means 11 relative to the traction surface 47.
  • analyzed gradients, frequency spectra and/or amplitudes can provide an indication of the type and/or extent of wear on the traction surface 47.
  • the guide components 41 may show wear to the extent that forces exerted on the elevator car 5 are no longer exerted evenly, but rather, for example, jerky forces are induced on the elevator car 5. These are passed on to the support means 5 holding the elevator car 5 and can thus be measured using the sensors 29.
  • gradients, frequency spectra and/or amplitudes of the measured tensile forces conclusions can also be drawn in this case about the type and/or extent of changes in the properties of the support means arrangement 9 caused by the wear of the guide components 41.
  • embodiments of the method described here can also be used to determine wear on guide structures 49, which, for example, guide the support means 11 laterally on the drive pulley 15 and prevent it from slipping. Wear on these guide structures 49 can lead to the support means 11 being able to shift briefly in the axial direction of the drive pulley 15 and partially running into the guide structures 49. The apparently increased radius of the drive pulley 15 caused by this causes a short-term force peak on the Support element 11 before it slides back to its correct position on the traction surface. A gradient, a frequency spectrum and/or an amplitude of this force peak can be characteristic of the wear on the guide structure 49.
  • the evaluation device 25 can output a notification signal.
  • This notification signal can be transmitted, for example, to an external monitoring center or to a technician carrying out the inspection. If necessary, information can be integrated into the notification signal that contains information about the type and/or extent of a recognized change in the properties of the support means arrangement 9, so that the inspection can be prepared and carried out in a targeted manner.
  • the method proposed herein and the suspension element monitoring device 27 provided for its implementation can enable simplified installation of the suspension element arrangement 9, reduced effort in the maintenance of the suspension element arrangement 9 and/or increased reliability in the monitoring of properties of the suspension element arrangement 9.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
EP19712232.8A 2018-03-27 2019-03-27 Verfahren und vorrichtung zum überwachen von eigenschaften einer tragmittelanordnung in einer aufzuganlage Active EP3774630B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18164231 2018-03-27
PCT/EP2019/057694 WO2019185695A1 (de) 2018-03-27 2019-03-27 Verfahren und vorrichtung zum überwachen von eigenschaften einer tragmittelanordnung in einer aufzuganlage

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EP3774630A1 EP3774630A1 (de) 2021-02-17
EP3774630B1 true EP3774630B1 (de) 2024-05-01

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US (1) US20210371245A1 (zh)
EP (1) EP3774630B1 (zh)
CN (1) CN111836772B (zh)
WO (1) WO2019185695A1 (zh)

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US11718501B2 (en) 2020-04-06 2023-08-08 Otis Elevator Company Elevator sheave wear detection
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US20210371245A1 (en) 2021-12-02
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CN111836772A (zh) 2020-10-27

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