EP4034479A1 - Verfahren und messsystem zur erkennung und lokalisation von fehlstellungen von tragrollen in gurtförderanlagen - Google Patents
Verfahren und messsystem zur erkennung und lokalisation von fehlstellungen von tragrollen in gurtförderanlagenInfo
- Publication number
- EP4034479A1 EP4034479A1 EP20786478.6A EP20786478A EP4034479A1 EP 4034479 A1 EP4034479 A1 EP 4034479A1 EP 20786478 A EP20786478 A EP 20786478A EP 4034479 A1 EP4034479 A1 EP 4034479A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- belt
- sensors
- pressure sensors
- support roller
- measuring system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/02—Control devices, e.g. for safety, warning or fault-correcting detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/10—Arrangements of rollers
- B65G39/12—Arrangements of rollers mounted on framework
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/10—Arrangements of rollers
- B65G39/12—Arrangements of rollers mounted on framework
- B65G39/16—Arrangements of rollers mounted on framework for aligning belts or chains
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
Definitions
- the present invention relates to a method and a measurement system for the detection and localization of a misalignment of support rollers in
- German utility model DE 20 2008018541 U1 describes a device for recognizing the position of
- Idler stations This is a system integrated into the belt, with a magnetic sliding body being movably mounted in a sliding channel. If the magnetic sliding body approaches a metallic support roller, the magnetic sliding body is attracted and deflected by this. The alignment of the support rollers can be determined by changing the position of the sliding body.
- Pressure transducers and displacement transducers are permanently installed on the surface of the conveyor belt or inside the conveyor belt. Using pressure or
- Shear stress sensors absorb the forces that act on the conveyor rollers. An increased force acts on idler stations that have a vertical misalignment. A reference load is also required to identify lower-lying roller sinks. Additional lateral measuring sensors enable the identification of the conveyor roller sinks shifted on the Y-axis. However, it is not exactly described how the determination of lateral misalignments works in detail.
- the measuring system described here is permanently installed inside the conveyor belt and is not intended for mobile use.
- WO 2006/119832 A1 describes a device for monitoring the belt alignment and / or the belt run by means of pressure or shear stress sensors. When driving over the idler stations, the pressure or shear stress curve is measured. An atypical course indicates misalignment or bearing damage. The absence of a signal indicates missing idlers or idlers that are not in contact with the conveyor belt. A misalignment of the conveyor belt, on the other hand, is shown by the increase in the load on one side with a simultaneous reduction on the other side.
- the sensors of the measuring device are firmly embedded inside the conveyor belt.
- a Tekscan sensor was used in experiments to investigate the dynamic pressure on a loaded belt conveyor. It is a sensor mat. This sensor mat is attached to the top of the conveyor belt and thus enables the bulk belt-belt interaction to be measured, which occurs between the idler stations when the belt is opened and closed.
- the use of a Tekscan mat enables a three-dimensional resolution of the pressure distribution.
- the support roller positions can also be recognized. These are located at the points with a large, sudden increase in pressure (Xiangwei Liu et al. "Quantification of the pressure distribution on a loaded conveyor beit using a tactile pressure sensor" (Proceedings of the XXI International Conference MHCL 2015)).
- the normals of the support rollers point in the conveying direction.
- misalignments for example due to a rotation of the support rollers around the vertical axis and a camber position, the support roller normal deviates from its optimal position in the conveying direction, which influences the belt run.
- misalignment of individual idlers and belt misalignment.
- Belt misalignment which is a lateral movement of the drive belt and the conveyor belt, involves not just individual, but a large number of support rollers.
- a method for determining and localizing misalignments of idlers in belt conveyor systems is provided, a number of pressure sensors corresponding at least to the number of idlers of a idler station being arranged in a line spaced from one another over the width of the belt on the underside of the belt, and when a sensor is guided over a support roller, a signal of the contact pressure point is generated upon contact and the signal is measured, the sensors being releasably attached to the underside of the belt.
- the present invention relates to an easy-to-use method for determining and localizing misalignments of idlers in conveyor systems with the aid of pressure sensors and evaluating the measurement signals from the pressure sensors and measurement system for this purpose, the measurement system being detachably connected to the belt of the system and being mobile.
- the present invention enables the sensors to be mounted on the belt without damage, without the need for bores and the like for fastening means.
- a damage-free assembly is advantageous because interventions in the belt can be avoided, which can impair the belt or its operation.
- each idler roller of a idler station is assigned at least one pressure sensor that runs over this idler during operation.
- the sensors detect the Contacts with the idlers.
- the measurement signals obtained can then be evaluated and analyzed.
- the present invention also relates to a measuring system for carrying out the method according to the invention, the measuring system comprising a unit made up of a number of pressure sensors, the number of pressure sensors corresponding to at least the number of support rollers of a support roller station.
- the present invention makes use of the fact that a typical pressure is exerted when the support rollers of a support roller station are passed over. A deviation from the typical pattern indicates a defect.
- the sensors run over the individual support rollers of a support roller station at the same time, and the recorded measuring points appear on a line at the same height, for example in the case of graphical evaluation.
- the corresponding sensor overruns the deflected support roller, earlier or later than the pressure sensors, over the other support rollers of the relevant support roller station, depending on the direction of deflection.
- the measuring points are shown shifted accordingly in a diagram.
- the method and measuring system according to the invention is in principle suitable for all types of support roller stations, such as, for example, garlands or support roller chairs.
- support roller stations such as, for example, garlands or support roller chairs.
- the individual rollers are placed in a support frame.
- the support rollers are held at the ends of the axle via point connections so that the garland is only attached to the ends of this chain in the frame.
- all sensors can be used that are able to measure the contact pressure on a support roller.
- a pressure sensor such as a Force Sensing Resistor (FSR), brand name of Interlink Electronics, can be used.
- FSR Force Sensing Resistor
- the sensors should be as thin as possible so as not to affect the way the belt is guided over the idlers.
- thin means that the thickness is significantly less than the length and breadth.
- the individual sensors are attached in a row, i.e. in a flea, across the width of the belt on the underside of the belt, the distance between the individual sensors and the distance between the end sensors and the edge of the belt being selected as required and the number of individual sensors can.
- At least the distance between the sensors that are assigned to a support roller is the same.
- the distance between all sensors in the measuring arrangement can also be selected to be the same.
- the type of fastening of the sensors on the underside of the belt is essentially not subject to any restrictions.
- the fastening is detachable and should nevertheless be able to ensure that the pressure sensors are securely mounted on the underside during operation, even when the belt is loaded.
- Adhesive tapes or the like can be used for fastening.
- the adhesive tapes can be fabric adhesive tapes. So-called adhesive pads, such as vacuum pads, etc., can be used.
- the sensors of a sensor unit can be applied to a carrier medium such as a carrier plate or film.
- the carrier medium can be attached to the underside of the belt in a detachable manner and preferably without damage.
- the carrier medium should be flexible enough to adapt to the shape and movement of the belt.
- the sensor unit with the associated supply lines can be embedded in an elastic layer, e.g. in foam rubber or the like.
- the individual pressure sensors can not only be detachably connected to the carrier medium or the elastic layer, but also firmly, as long as the carrier medium or the elastic layer itself can be detachably connected to the belt.
- the same fastening means as for the pressure sensors can be used to attach the carrier plate to the underside of the belt. Furthermore, the carrier medium can be fastened to the belt edges with clips or the like, which can be easily detached again.
- a mobile measuring system is created that can be used when required and is not limited to a conveyor system, such as devices that are firmly integrated into the belts.
- the method according to the invention and the measuring system according to the invention are equally suitable for conveyor systems with troughed and non-troughed conveyor belts.
- At least three sensors are required for a conveyor roller station with three conveyor rollers. At least two sensors are required for idler roller stations such as lower belt rollers.
- the measuring system expediently comprises means for recording,
- the sensor arrangement can be connected to a computer which, for example, travels with the sensor arrangement during the measurement.
- the recorded measurement signals can be sent to an independent unit for evaluation by means of wireless data transmission.
- the measuring lines of the individual sensors of a sensor unit open into a common collecting channel, which is or can be connected to means for evaluating the measuring signals.
- Analog-digital converters or the like can be used for the acquisition of measured values.
- An example of the measurement value processing is a computer or the like.
- Communication modules such as WiFi or Bluetooth can also be used.
- a bus system can be used for data transmission between the individual components.
- a system plan can be created that directly shows the relative position of the belt on the system, as well as the position and the presence of the idlers.
- FIG. 1 schematically shows a belt section with three sensors and a support roller station with three support rollers
- FIG. 2 misalignments of the support rollers and their characteristic measurement signal
- FIG. 3 contact points with a carrier roller station rotated about the vertical axis;
- FIG. 4 shows the typical contact detection with correctly aligned idlers and the belt in the middle of the idler station;
- FIG. 5 shows an atypical contact recognition by a support roller station shifted laterally to the left
- FIG. 6 shows a schematic representation of a sensor unit which is connected to an evaluation unit
- FIG. 7 shows a plan view of the underside of a sensor unit as shown in FIG. 6, when passing a support roller station and
- FIG. 8 shows a cross section through a belt with a sensor arrangement attached to the underside.
- the structure of the measuring system according to the invention is shown schematically in FIG. 1, with optimal alignment of the support rollers 1, the support roller normals pointing parallel to the running direction 3 of the conveyor belt 2.
- At least three sensors 4 are attached to the underside of the belt.
- the sensors 4 are located between Belt 2 and carrier rollers 1 and measure the contact pressure on contact with the carrier rollers 1 when the carrier rollers 1 are driven over.
- At least one sensor 4 is assigned to each support roller 1.
- the sensors 4 are arranged in a line at a level along the transverse axis of the conveyor belt 2 at defined intervals.
- the distances between the individual sensors 4 are preferably the same.
- FIG. 2 a support roller station rotated about the vertical axis with three support rollers and their characteristic measurement signal are shown schematically in the upper figures.
- the arrangement of three support rollers 1 is rotated clockwise around the vertical axis.
- the sensors 4 assigned to the respective carrier roller 1 run over the relevant carrier roller 1 one after the other at different times.
- the measuring points appear shifted on a time scale, the measuring point for the support roller 1 pointing backwards in the running direction being recorded in front of the measuring point for the middle support roller and this before the measuring point for the roll pointing forwards in the running direction.
- the measuring points appear at the same time with ideal alignment of the idler rollers 1, as shown in the diagram for the preceding and following idler roller station.
- the idler station has three idlers 1, the two terminal idlers 1 being angled forward in the direction of travel to the transverse axis.
- the direction of travel of the middle roller 1 corresponds to the ideal alignment.
- the measuring points for the end idler rollers 1 appear offset in time and consequently later than the measuring point for the central idler roller 1.
- the ideally aligned measuring points for correctly aligned idler rollers 1 can be seen on the left and right in the diagram. These measuring points appear on the time scale at the same point in time.
- FIG. 3 a diagram of the belt width over the conveying path is shown, with an indication of the position of the contact points for a support roller station rotated about the vertical axis. All three measuring points deviate from the ideal line (in Figure 3 perpendicular to the conveyor line).
- the angle of rotation can be calculated individually for each idler station.
- the position of the belt 2 relative to the support rollers 1 can also be detected. Assuming that the idler stations are in a line, the lateral position of the belt 2 can be analyzed, as explained below with reference to FIGS. 4 and 5.
- the contact detection with an arrangement with twelve sensors is shown schematically, which are arranged across the width of the belt. If the idler stations are correctly aligned, a straight conveyor belt lies symmetrically in the station and, depending on the discretization of the measuring system, has contact with the idlers at several sensors. Sensors with contact are shown in black. The sensors with the numbers 2, 6, 7 and 11 are in contact with bending points of the belt where the contact force is lower. These sensors are shown in white.
- Support roller stations or belt 2 resting eccentrically on the support rollers 1 is shown in Figure 5.
- the contact points 5 here are asymmetrical to one another (here sensors no. 1, 5, 6 and 10). The amount by which the belt is relatively on the idler station can be determined more precisely, the finer the resolution of the belt width with sensors.
- a support roller misalignment can be distinguished from a belt misalignment by considering the support rollers as a group. Individual idlers cut through an asymmetrical contact pattern out, this is a misalignment. However, if this picture concerns a large number of idlers, the belt is misaligned.
- FIG. 6 shows a schematic representation of a sensor arrangement according to the invention which is connected to an evaluation station.
- the sensor unit has twelve sensors 4 which are applied to a carrier medium 6, such as a carrier plate or carrier film. Each sensor 4 is connected via a measuring line 7 to a collecting channel 8, which in turn establishes the connection to an evaluation station.
- the evaluation station shown in Figure 6 has a measured value acquisition 9, for example an analog-digital converter, a bus system 10, a measured value processing unit 11, for example a computer, and a communication module 12 that can work with WiFi or Bluetooth, for example.
- FIG. 7 is a view of the underside of a belt 2 and shows the measuring system according to the invention with sensors 4, carrier medium 6 as well as measuring lines 7 and collecting channel 8 when passing a carrier roller 1 which is mounted in a carrier roller station 13.
- FIG. 1 A cross section through a conveyor belt 2 with a sensor arrangement applied to the underside is shown in FIG.
- the sensors 4 with measuring line 7 and collecting channel 8 are arranged on a carrier film 6 and embedded in an elastic layer 14 between the underside of the belt 2 and carrier film 6.
- the elastic layer 14 can be foam rubber or a comparable elastic material.
- the great advantage of the measuring system according to the invention is that, on the one hand, it has a simple design, can be detachably connected to a conveyor belt, so that it is used for mobile measurements on more than one conveyor system can be, and can also preferably be attached to the belt to be measured without damage.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Conveyors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019126060.4A DE102019126060B4 (de) | 2019-09-26 | 2019-09-26 | Verfahren und Messsystem zur Erkennnung und Lokalisation von Fehlstellungen von Tragrollen in Gurtförderanlagen |
PCT/EP2020/076783 WO2021058682A1 (de) | 2019-09-26 | 2020-09-24 | Verfahren und messsystem zur erkennung und lokalisation von fehlstellungen von tragrollen in gurtförderanlagen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4034479A1 true EP4034479A1 (de) | 2022-08-03 |
Family
ID=72752880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20786478.6A Pending EP4034479A1 (de) | 2019-09-26 | 2020-09-24 | Verfahren und messsystem zur erkennung und lokalisation von fehlstellungen von tragrollen in gurtförderanlagen |
Country Status (9)
Country | Link |
---|---|
US (1) | US20220371827A1 (de) |
EP (1) | EP4034479A1 (de) |
AU (1) | AU2020353271A1 (de) |
BR (1) | BR112022003850A2 (de) |
CA (1) | CA3152312A1 (de) |
CL (1) | CL2022000750A1 (de) |
DE (1) | DE102019126060B4 (de) |
WO (1) | WO2021058682A1 (de) |
ZA (1) | ZA202202488B (de) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19911642B4 (de) * | 1999-03-16 | 2006-08-31 | Lausitzer Braunkohle Aktiengesellschaft (Laubag) | Verfahren zur fortlaufenden Messung des Verschleißes aller Tragrollen in Gurtförderern |
DE19911640B4 (de) * | 1999-03-16 | 2006-02-16 | Vattenfall Europe Mining Ag | Verfahren und Ermittlung von Einbaufehlern an Tragrollenstationen und kompletten Traggerüsten in Gurtförderern |
DE102005021627A1 (de) * | 2005-05-06 | 2006-11-16 | Rwe Power Ag | Verfahren zur Überwachung der Bandausrichtung und/oder des Bandlaufs einer Gurtbandfördereinrichtung sowie Gurtbandförderer |
US7673739B2 (en) * | 2008-02-04 | 2010-03-09 | Honeywell International Inc. | Apparatus and method for in-belt conveyor idler condition monitoring |
DE202008018541U1 (de) * | 2008-04-15 | 2015-06-30 | Voith Patent Gmbh | Fördergurt |
US20110137613A1 (en) | 2008-08-05 | 2011-06-09 | Bridgestone Corporation | Monitoring system for belt support rollers |
JP5318611B2 (ja) * | 2009-02-19 | 2013-10-16 | 株式会社ブリヂストン | コンベヤベルト及びガイドローラの不良判定システム |
JP2010159137A (ja) * | 2009-01-08 | 2010-07-22 | Bridgestone Corp | コンベヤベルト |
WO2012122597A1 (en) * | 2011-03-14 | 2012-09-20 | Intium Energy Limited | Vibration detection system, apparatus and method |
EA028198B1 (ru) * | 2012-10-24 | 2017-10-31 | Биг Дачман Интернэшнл Гмбх | Конвейер и способ транспортировки продуктов жизнедеятельности животных в сельскохозяйственном предприятии |
US9746385B2 (en) * | 2013-06-12 | 2017-08-29 | Honeywell International Inc. | System and method for measuring varying parameters using adaptive signal conditioning |
DE102017130104A1 (de) * | 2017-12-15 | 2019-06-19 | Voith Patent Gmbh | Vorrichtung zur Erkennung von Ausrichtfehlern eines Gurtförderers |
-
2019
- 2019-09-26 DE DE102019126060.4A patent/DE102019126060B4/de active Active
-
2020
- 2020-09-24 BR BR112022003850A patent/BR112022003850A2/pt unknown
- 2020-09-24 WO PCT/EP2020/076783 patent/WO2021058682A1/de unknown
- 2020-09-24 AU AU2020353271A patent/AU2020353271A1/en active Pending
- 2020-09-24 US US17/762,071 patent/US20220371827A1/en active Pending
- 2020-09-24 CA CA3152312A patent/CA3152312A1/en active Pending
- 2020-09-24 EP EP20786478.6A patent/EP4034479A1/de active Pending
-
2022
- 2022-02-28 ZA ZA2022/02488A patent/ZA202202488B/en unknown
- 2022-03-25 CL CL2022000750A patent/CL2022000750A1/es unknown
Also Published As
Publication number | Publication date |
---|---|
DE102019126060A1 (de) | 2021-04-01 |
BR112022003850A2 (pt) | 2022-05-31 |
DE102019126060B4 (de) | 2022-05-05 |
CL2022000750A1 (es) | 2023-01-20 |
AU2020353271A1 (en) | 2022-04-07 |
CA3152312A1 (en) | 2021-04-01 |
US20220371827A1 (en) | 2022-11-24 |
ZA202202488B (en) | 2022-10-26 |
WO2021058682A1 (de) | 2021-04-01 |
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