EP2935071A1 - Lift system with monitoring device and method for monitoring a lift system - Google Patents
Lift system with monitoring device and method for monitoring a lift systemInfo
- Publication number
- EP2935071A1 EP2935071A1 EP13802043.3A EP13802043A EP2935071A1 EP 2935071 A1 EP2935071 A1 EP 2935071A1 EP 13802043 A EP13802043 A EP 13802043A EP 2935071 A1 EP2935071 A1 EP 2935071A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tension members
- suspension element
- elevator installation
- measuring bridge
- electrical resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012806 monitoring device Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 17
- 238000012544 monitoring process Methods 0.000 title description 7
- 239000000725 suspension Substances 0.000 claims description 76
- 238000009434 installation Methods 0.000 claims description 27
- 239000000969 carrier Substances 0.000 claims description 11
- 230000007613 environmental effect Effects 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 108010074506 Transfer Factor Proteins 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- B66B7/1223—Checking means specially adapted for ropes or cables by analysing electric variables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
- B66B7/062—Belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
- B66B7/064—Power supply or signal cables
Definitions
- the present invention relates to an elevator installation with a
- Monitoring device for a suspension as well as a method for determining a state of a suspension in an elevator system.
- belt-like support means which have tension members and a jacket arranged around the tension members used.
- test current can be used to monitor such tension members in belt-type suspension elements
- the tension members are created.
- a current flow, a voltage, an electrical resistance or an electrical conductivity is measured.
- a size measured in this way it is possible to deduce an integrity or a degree of wear of the suspension element. This reduces the diameter of a
- the published patent application DE3934654A1 discloses, for example, a serial connection of all individual tension members and an ammeter, wherein it is checked whether an electric current flows through the series-connected tension members. As a result, it can be determined whether one of the tension members is interrupted at one point.
- the patent US7123030B2 discloses a calculation of an electrical resistance by a measurement of a current voltage by means of a Kelvin bridge and a comparison of the thus determined voltage value with an input reference value.
- WO2003 / 059798A2 discloses a belt-type suspension element for elevator installations. It can be concluded by a determination of an electrical resistance of the tension member of the support means to a load of the support means, and thus to a loading of the cabin. In addition, breakage of tension members can also be detected by the resistance measurement when an infinitely high resistance is detected. For example, a Wheatstone bridge can be used to determine the resistance.
- an elevator installation with a cabin and at least one suspension element is initially proposed, wherein the cabin is at least partially supported by the suspension element, and wherein the suspension element comprises a plurality of mutually parallel electrically conductive tension members, which are substantially enveloped by a jacket.
- the elevator installation further comprises a monitoring device which detects the tension members or groups of tension members as electrical resistances changing constellation in a measuring bridge interconnected, so that electrical
- Resistors of different train carriers or groups of tension members are comparable to each other based on a bridge voltage.
- Humidity or magnetic fields is distorted. This is achieved by a comparison of tension members, which are exposed to substantially identical environmental influences. Thus, the condition of the suspension element with the device proposed here can be better estimated.
- Bridge voltage as an indicator of the state of the suspension means an easy to assess and also easy to determine parameters available. As a result, the monitoring of the suspension is significantly simplified, and distorted readings and interpretation errors can be largely eliminated.
- the constellation of electrical resistances in the measuring bridge has the advantage that each tension member or each group of tension members can be compared with a number of other tension members or groups of tension members. This increases the information about the condition of individual tension members or groups of tension members, because this also enables similar defects to be reliably detected with different tension members or groups of tension members.
- a single tension member is connected as an electrical resistance in the measuring bridge.
- a plurality of tension members of a single suspension element can be connected to one another in a measuring bridge, or tensile carriers of different suspension elements of the elevator installation can be connected to one another in a measuring bridge.
- Such an interconnection of the tension members has the advantage that each individual tension member of a suspension element is checked for its condition can.
- such an interconnection requires a series of measurements in order to check all tension members of all suspension elements of an elevator installation.
- a plurality of tension members are each one
- Suspension device interconnected as a group as an electrical resistance in the measuring bridge.
- several groups of tension members of a single suspension element can be connected to one another in a measuring bridge, or groups of tension members of different suspension elements of the elevator installation can be connected to one another in a measuring bridge.
- Such an interconnection of the tension members has the advantage that fewer measuring operations are necessary in order to check all tension members of all suspension elements of an elevator installation.
- By a suitable bundling of the tension members into groups an efficient monitoring of the suspension elements can thus be achieved.
- all tensile carriers of a suspension element are interconnected as a group as an electrical resistance in the measuring bridge.
- Such an interconnection of the tension members has the advantage that the individual tension members of a
- the tensile carriers of a group are each interconnected in series, thus forming an electrical resistance in the measuring bridge.
- the tension members of a group are each connected in parallel with one another, thus forming an electrical resistance in the measuring bridge.
- one or the other interconnection may be advantageous. It should be ensured that damage to the tension members, which result in a change in the electrical resistance of the tension members are reliably detected.
- an interconnection can be optimally adapted to the conditions here.
- four electrical resistances are comprised of interconnected one or more tension members in a Wheatstone bridge.
- a Wheatstone bridge has the advantage that a deviating electrical resistance can be reliably determined by a determination of the bridge voltage. This ensures a reliable detection of a defective tension member or a group of defective tension members.
- no absolute electrical resistance values of the tension members or the groups of tension members can be determined by the monitoring device.
- Such an embodiment of the monitoring device has the advantage that the monitoring device is inexpensive and easy to manufacture.
- the elevator installation in this case comprises a cabin and at least one suspension element, wherein the cabin is at least partially supported by the suspension element, and wherein the suspension element comprises a plurality of mutually parallel electrically conductive tension members, which are substantially enveloped by a jacket.
- the method comprises the steps: interconnecting the tension members or groups of tension members in alternating constellation to electrical resistances in a measuring bridge; and determining a state of the suspension element by comparing the electrical resistances of the tensile carriers or groups of tensile carriers by means of a bridge voltage.
- Such a method is initially disadvantageous because no absolute values are available for the evaluation of the measurement results.
- the method makes it possible to make a qualitative statement about the state of the tension members of the suspension element, which is not distorted by environmental influences such as temperature, humidity or magnetic fields. This is achieved by a comparison of tension members, which are exposed to substantially identical environmental influences. Thus, a condition of the suspension element can be better estimated.
- the interconnection of the tension members or the groups of tension members in alternating constellation has the advantage that by comparing a tension member or a group of tension members with a larger number of tension members or groups of tension members a better statement about the state of the individual tension member or . of the Group of tension members can be made.
- each individual tensile carriers form an electrical resistance in the measuring bridge.
- several or all tensile carriers of a suspension element form an electrical resistance in the measuring bridge.
- no absolute resistance values of the tension members or the groups of tension members are determined.
- Such a method in turn has the advantage that it does not require unnecessarily many parameters to be measured and evaluated. This prevents the risk of measurement errors and misinterpretations of measurement results.
- the determination disclosed herein of a state of a suspension means or the monitoring device disclosed herein can be used in different types of
- Elevator systems are used.
- elevator systems with or without shaft, with or without counterweight, or elevator systems with different gear ratios can be used.
- each belt-type suspension element in an elevator installation, which carries a car can be monitored with the method or device disclosed here.
- the invention will be explained symbolically and by way of example with reference to figures. Show it:
- Figure 1 shows an exemplary embodiment of an elevator system
- Figure 2 shows an exemplary embodiment of a support means
- Figures 3a-3c each an exemplary embodiment of a measuring bridge.
- the elevator installation 40 illustrated schematically and by way of example in FIG. 1 includes an elevator cage 41, a counterweight 42 and a suspension element 1 and a traction sheave 43 with associated drive motor 44.
- the traction sheave 43 drives the suspension element 1 and thus moves the elevator cage 41 and the counterweight 42 counter to one another ,
- the drive motor 44 is controlled by an elevator control 45.
- the cabin 41 is designed to receive people or goods and to transport between floors of a building. Cabin 41 and counterweight 42 are guided along guides (not shown). In the example, the cabin 41 and the counterweight 42 are each suspended on support rollers 46.
- the suspension element 1 is at a first
- suspension element 1 runs at a higher speed via the drive 43, 44, in accordance with a transfer factor, than the car 41 or counterweight 42 move.
- the wrap factor is 2: 1.
- a loose end 1.1 of the suspension element 1 is provided with a contacting device 2 for temporary or permanent electrical contacting of the tension members and thus for monitoring the suspension element 1.
- a contacting device 2 is arranged at both ends 1.1 of the suspension element 1.
- only one contacting device 2 is arranged on one of the support means ends 1.1, and the tension members on the other
- Tragschende 1.1 are electrically connected.
- the support means ends 1.1 are no longer burdened by the tensile force in the suspension element 1, since this tensile force already prevail is passed over the suspension means fasteners 47 in the building.
- the contacting devices 2 are thus in a non-overrun area of the
- the contacting device 2 is connected at one end of the support means 1.1 with a monitoring device 3.
- the monitoring device 3 interconnects the tension members of the suspension element 1 as electrical resistors in a measuring bridge.
- the electrical resistances of different tension members are comparable to one another on the basis of a bridge tension determined by the monitoring device 3.
- the monitoring device 3 is also with the
- Elevator control 45 connected. As a result, a signal or a measured value can be transmitted from the monitoring device 3 to the elevator control 45 in order to take into account the state of the suspension element 1 as determined by the monitoring device 3 in a control of the elevator 40.
- the elevator installation 40 shown in FIG. 1 is exemplary. Other capping factors and arrangements, such as counterbalanced lift systems, are possible.
- the contacting device 2 for contacting the support means 1 is then
- FIG. 2 shows a section of an exemplary embodiment of a suspension element 1.
- the support means 1 comprises a plurality of mutually parallel electrically conductive tension members 5, which are enveloped by a jacket 6. To the electric
- the jacket 6 can be pierced or removed, for example, or the tension members 5 can also frontally of a
- Contacting device 2 are electrically contacted.
- the suspension element is equipped with longitudinal ribs on a traction side.
- Such longitudinal ribs improve a traction of the suspension element 1 on the traction sheave 43 and also facilitate lateral guidance of the suspension element 1 on the traction sheave 43.
- the suspension element 1 can also be configured differently, for example without longitudinal ribs, or with a different number or different
- the tension members 5 are designed to be electrically conductive.
- measuring bridges 12 are shown schematically. In each case electrical resistors 14 are interconnected to a measuring bridge 12. A voltage source 13 provides a total voltage across the measuring bridge 12, and a bridge voltage 15 can be used as a parameter for equality or diversity of the electrical resistors 14.
- tensile carriers 5 of a suspension element 1 are used individually or in groups as electrical resistors 14 in a measuring bridge 12, information about the state of the tension members 5 and thus of the suspension element 1 can be obtained by evaluating the bridge tension 15.
- FIG. 3 a shows a Wheatstone bridge 12.
- Four electrical resistors 14 are interconnected in such a way that the bridge voltage 15 is zero when all four electrical resistors 14 are the same size.
- FIG. 3b a measuring bridge 12 is shown, in which in each case two electrical resistors 14 are connected in parallel and form a group. A total of four such groups form the measuring bridge 12, in which in turn the bridge voltage 15 can be used as a measure of the equality of the electrical resistors 14.
- FIG. 3 c shows a measuring bridge 12 in which eight electrical resistors 14 are connected. Here, a bridge voltage 15 can be determined at several locations. Again, the bridge voltage 15 can be used as a measure of the equality of the electrical resistors 14.
- the measuring bridges shown here are examples of a suitable measuring bridge for determining a condition of a suspension element. It goes without saying that different types of measuring bridges can be used to achieve the same technical effect. For example, a three-quarter or one half-bridge can be used. Thus, depending on the configuration of the elevator installation or the suspension element, a suitable measuring bridge can be selected.
Landscapes
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13802043.3A EP2935071B1 (en) | 2012-12-18 | 2013-12-06 | Lift assembly with monitoring device and method for monitoring a lift assembly |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12197674 | 2012-12-18 | ||
PCT/EP2013/075826 WO2014095430A1 (en) | 2012-12-18 | 2013-12-06 | Lift system with monitoring device and method for monitoring a lift system |
EP13802043.3A EP2935071B1 (en) | 2012-12-18 | 2013-12-06 | Lift assembly with monitoring device and method for monitoring a lift assembly |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2935071A1 true EP2935071A1 (en) | 2015-10-28 |
EP2935071B1 EP2935071B1 (en) | 2016-10-12 |
Family
ID=47552765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13802043.3A Active EP2935071B1 (en) | 2012-12-18 | 2013-12-06 | Lift assembly with monitoring device and method for monitoring a lift assembly |
Country Status (12)
Country | Link |
---|---|
US (1) | US9975734B2 (en) |
EP (1) | EP2935071B1 (en) |
CN (1) | CN104854012B (en) |
AU (1) | AU2013361005B2 (en) |
BR (1) | BR112015012964B1 (en) |
CA (1) | CA2890138C (en) |
ES (1) | ES2611003T3 (en) |
HK (1) | HK1211008A1 (en) |
MX (1) | MX361117B (en) |
MY (1) | MY172444A (en) |
SG (1) | SG11201503569YA (en) |
WO (1) | WO2014095430A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2958845A4 (en) * | 2013-02-21 | 2016-10-26 | Otis Elevator Co | Elevator cord health monitoring |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014001372A1 (en) * | 2012-06-29 | 2014-01-03 | Inventio Ag | Lift system |
CA2884913C (en) * | 2012-10-22 | 2017-06-06 | Inventio Ag | Support means for a lift installation |
CA2910989A1 (en) * | 2013-05-28 | 2014-12-04 | Inventio Ag | Elevator system |
EP3060510B1 (en) * | 2013-10-22 | 2019-02-27 | KONE Corporation | Method and device for checking the integrity of load bearing members of an elevator system |
AU2015321059B2 (en) | 2014-09-26 | 2018-11-15 | Inventio Ag | Elevator system |
CN111232797A (en) * | 2014-10-22 | 2020-06-05 | 因温特奥股份公司 | Elevator installation |
MX2017006873A (en) * | 2014-11-28 | 2017-08-14 | Inventio Ag | Elevator system. |
US9932203B2 (en) * | 2015-07-31 | 2018-04-03 | Inventio Ag | Method and device for detecting a deterioration state of a load bearing capacity in a suspension member arrangement for an elevator |
WO2018141553A1 (en) * | 2017-01-31 | 2018-08-09 | Inventio Ag | Suspension member arrangement for an elevator and monitoring arrangement for monitoring a suspension member |
US11708241B2 (en) | 2017-06-21 | 2023-07-25 | Inventio Ag | Method for self-testing a monitoring device monitoring an integrity status of a suspension member arrangement in an elevator |
WO2019052909A1 (en) * | 2017-09-15 | 2019-03-21 | Inventio Ag | Method for electrical attachment of a connecting element to a belt for a lift system and corresponding belt assembly |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3934654A1 (en) | 1989-10-14 | 1991-05-23 | Sondermaschinenbau Peter Suhli | Break testing of continuous carrier belt - using carrier strands in non-conducting strap interconnected to form continuous conducting body |
US6633159B1 (en) * | 1999-03-29 | 2003-10-14 | Otis Elevator Company | Method and apparatus for magnetic detection of degradation of jacketed elevator rope |
US20020194935A1 (en) * | 2001-06-26 | 2002-12-26 | Arthur Clarke | Tensile load sensing belt |
US20030121729A1 (en) | 2002-01-02 | 2003-07-03 | Guenther Heinz | Lift belt and system |
CN1253703C (en) * | 2003-10-14 | 2006-04-26 | 曾晓东 | Brake force moment measuring device and method |
CN100564215C (en) * | 2004-03-16 | 2009-12-02 | 奥蒂斯电梯公司 | A kind of method and device thereof of monitoring the situation of elevator load bearing member |
BRPI0418637A (en) | 2004-03-16 | 2007-09-04 | Otis Elevator Co | support frame monitoring system for an elevator, elevator support frame assembly, and, method for monitoring a condition of the elevator support frame |
ES2354157T3 (en) * | 2004-03-16 | 2011-03-10 | Otis Elevator Company | WEAR DETECTION AND FAILURE OF AN ELEVATOR LOAD SUPPORT MEMBER. |
AU2009331700B2 (en) * | 2008-12-22 | 2016-07-07 | Inventio Ag | Method for monitoring an elevator support means, an elevator support means monitoring device, and an elevator system having such a monitoring device |
US9423369B2 (en) * | 2010-09-01 | 2016-08-23 | Otis Elevator Company | Resistance-based monitoring system and method |
US9599582B2 (en) * | 2010-09-01 | 2017-03-21 | Otis Elevator Company | Simplified resistance based belt inspection |
CN104024136B (en) * | 2011-12-20 | 2016-05-25 | 因温特奥股份公司 | Lift facility |
FI124542B (en) * | 2012-12-30 | 2014-10-15 | Kone Corp | Method and arrangement of the condition of the lift rope |
CN103359567B (en) * | 2013-07-26 | 2015-10-14 | 日立电梯(中国)有限公司 | Elevator weighing system |
-
2013
- 2013-12-06 ES ES13802043.3T patent/ES2611003T3/en active Active
- 2013-12-06 AU AU2013361005A patent/AU2013361005B2/en active Active
- 2013-12-06 BR BR112015012964-1A patent/BR112015012964B1/en not_active IP Right Cessation
- 2013-12-06 MX MX2015007817A patent/MX361117B/en active IP Right Grant
- 2013-12-06 MY MYPI2015701533A patent/MY172444A/en unknown
- 2013-12-06 CN CN201380065775.0A patent/CN104854012B/en active Active
- 2013-12-06 EP EP13802043.3A patent/EP2935071B1/en active Active
- 2013-12-06 SG SG11201503569YA patent/SG11201503569YA/en unknown
- 2013-12-06 WO PCT/EP2013/075826 patent/WO2014095430A1/en active Application Filing
- 2013-12-06 US US14/653,299 patent/US9975734B2/en active Active
- 2013-12-06 CA CA2890138A patent/CA2890138C/en active Active
-
2015
- 2015-12-02 HK HK15111858.1A patent/HK1211008A1/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2014095430A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2958845A4 (en) * | 2013-02-21 | 2016-10-26 | Otis Elevator Co | Elevator cord health monitoring |
US9862571B2 (en) | 2013-02-21 | 2018-01-09 | Otis Elevator Company | Elevator cord health monitoring |
Also Published As
Publication number | Publication date |
---|---|
CN104854012B (en) | 2016-11-09 |
MX2015007817A (en) | 2015-08-20 |
CA2890138C (en) | 2017-08-22 |
MY172444A (en) | 2019-11-26 |
US9975734B2 (en) | 2018-05-22 |
ES2611003T3 (en) | 2017-05-04 |
WO2014095430A1 (en) | 2014-06-26 |
CN104854012A (en) | 2015-08-19 |
AU2013361005B2 (en) | 2017-01-05 |
HK1211008A1 (en) | 2016-05-13 |
CA2890138A1 (en) | 2014-06-26 |
BR112015012964B1 (en) | 2021-11-16 |
AU2013361005A1 (en) | 2015-07-09 |
US20150336769A1 (en) | 2015-11-26 |
MX361117B (en) | 2018-11-28 |
SG11201503569YA (en) | 2015-07-30 |
BR112015012964A2 (en) | 2017-07-11 |
EP2935071B1 (en) | 2016-10-12 |
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