[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP1581788A1 - Systeme de controle d'ensemble a courroie - Google Patents

Systeme de controle d'ensemble a courroie

Info

Publication number
EP1581788A1
EP1581788A1 EP03782673A EP03782673A EP1581788A1 EP 1581788 A1 EP1581788 A1 EP 1581788A1 EP 03782673 A EP03782673 A EP 03782673A EP 03782673 A EP03782673 A EP 03782673A EP 1581788 A1 EP1581788 A1 EP 1581788A1
Authority
EP
European Patent Office
Prior art keywords
belt
span
vibrations
pulley
spans
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Withdrawn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
EP03782673A
Other languages
German (de)
English (en)
Inventor
Robert Mechatronics Research Centre PARKIN
Luca Mechatronics Research Centre NOTINI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Royal Mail Group Ltd
Original Assignee
Royal Mail Group Ltd
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 Royal Mail Group Ltd filed Critical Royal Mail Group Ltd
Publication of EP1581788A1 publication Critical patent/EP1581788A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
    • G01L5/042—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands by measuring vibrational characteristics of the flexible member

Definitions

  • This invention relates to monitoring systems and in particular to systems for monitoring the condition of pulley and belt assemblies.
  • the term "pulley and belt assembly” as used herein is intended to include any kind of assembly where an elongate flexible member (“belt”) is driven around two or more rotatable members (“pulleys”), whether for the purpose of delivering rotational drive from one shaft to another or for the purpose of conveying items such as parcels or letters.
  • the invention provides a method of monitoring a pulley and belt assembly, comprising the steps of applying an external excitation to a span of the belt, detecting vibrations of the said span and/or of another span or spans of the belt, and identifying from said detected vibrations the resonant frequency of one or more of the belt spans, whereby to derive information about the condition of the belt and/or a pulley or pulleys in the assembly.
  • the invention also provides apparatus for monitoring a pulley and belt assembly, comprising means for imparting an external excitation to a span of the belt, means for detecting vibrations in the said span and/or in another span or spans of the belt, and means for identifying from said detected vibrations the resonant frequency of one or more of the belt spans, whereby to derive information about the condition of the belt and/or a pulley or pulleys in the assembly.
  • the invention further provides a method of monitoring a pulley and belt assembly, comprising the steps of detecting vibrations in two or more spans of the belt, and comparing the detected vibrations whereby to derive information about the condition of the belt and/or a pulley or pulleys in the assembly.
  • Figure 1 is a typical pulley and belt assembly incorporating a monitoring system according to the invention
  • Figure 2 illustrates typical plots of amplitude of sensed vibrations agamst frequency
  • Figure 3 illustrates typical plots of amplitude of sensed vibrations against time
  • Figure 4 shows an actual plot of the frequency spectrum of transverse vibrations of a moving belt
  • Figure 5 shows an actual plot of the frequency spectrum of transverse vibrations of a moving belt when subjected to an impulse
  • Figure 6 shows the resulting plot when the plots of Figures 4 and 5 are combined
  • Figure 7 is a plot of belt resonance frequency against belt velocity
  • a belt 10 is trained to move around two pulleys, a drive pulley 11 and a driven pulley 12.
  • An exciter device 13 is arranged to introduce a controlled vibration into a span SI of the moving belt (here, the tight span).
  • the exciter device 13 here is in the form of a reciprocable piston 14, operated by a solenoid.
  • the device 13 is arranged such that when the piston 14 extends, it will strike the belt 1 and thus impart an impulse causing the belt span to oscillate transversely.
  • Vibration sensors 15 and 16 are arranged near the belt 10 so as to detect vibrations in the belt in its tight span SI and slack span S2 respectively.
  • a data processing unit 17 is arranged to receive signals from both sensors 15 and 16.
  • the tension of a moving belt can be determined if the resonant frequency of the belt is known.
  • There are many frequency components present in the transverse vibrations of a moving belt however, from potential sources such as pulley eccentricity or sensor noise, as well as belt resonance frequency and related harmonics. The key, therefore, is to be able to make sense of all these indications in the frequency spectrum.
  • FIG 2 shows a typical plot of the frequency spectrum of transverse vibrations of the moving belt in the Figure 1 assembly.
  • This plot has been derived from signals received from the sensors 15 and/or 16 using a known Fast Fourier Transform (FFT).
  • FFT Fast Fourier Transform
  • the plot exhibits a number of peaks, with the highest being at around 34Hz. It cannot be assumed that this is the resonant frequency of the belt. In fact, this peak in this example is attributable to the frequency of pulley rotation, which happens to be close to a harmonic of the belt resonance frequency.
  • Figure 3 shows a plot of the frequency spectrum of transverse vibrations of the same moving belt, only this time after an external excitation in the form of an impulse from the exciter device 13 has been applied to the belt. Again, the plot has been derived from signals from the sensors 15 and/or 16 using the same known FFT. The peaks in this plot again require careful interpretation.
  • Figure 5 shows typical plots of the combined frequency spectrum of vibrations present in belt span SI, as detected by sensor 15 (plot (a)) and the vibrations present in belt span S2, as detected by sensor 16 (plot (b)), when subjected to an impulse by exciter device 13.
  • the peak in plot (a) represents the resonant frequency of span SI and the peak f 2 in plot (b) the resonant frequency of span S2.
  • Figure 6 shows typical plots of vibrations 'detected in belt spans SI and S2 by , sensors 15 and 16 over time (plots (c) and (d) respectively), when subjected to an impulse by exciter device 13.
  • Plot (c) shows, in addition to vibrations from "background noise", vibrations induced in belt span SI by the impulse from exciter device 13. The impulse strikes the belt at time to- Plot (d) shows the vibrations detected in belt span
  • the exciter device 13 could be used to impart repeated impulses to the belt at a chosen frequency, for example to enable the belt to be continuously monitored.
  • the particular frequency used for this purpose will preferably be chosen so that the resulting vibration signals will stand out as prominently as possible from the detected "background noise", in order to facilitate their identification and analysis.
  • the device 13 could be arranged with its piston 14 permanently in contact with the belt 10 and deliver to the belt a smusoidally-varying impulse.
  • the frequency of such an excitation would be chosen to induce in the belt vibrations at or around the resonant frequency of the span.
  • the resonant frequency corresponding to a given belt tension decreases as the velocity of the belt increases. This is a factor that must be accounted for when measuring belt tension whilst a belt is online.
  • a known mathematical model takes into consideration belt velocity and tension to calculate belt resonance frequency.
  • One of the possible benefits of such a model is that it may be used to determine the significance of any change in resonant frequency when measuring the tension of a particular belt driven at a certain velocity.
  • the model is especially relevant when attempting to monitor the tension of moving belts in mail sorting machines, for example, which use many different specifications of belt. The effect may be negligible for some types of belts, but more pronounced in others.
  • the model also shows that at a belt velocity of approximately 3 metres/second, there is a 4% difference between the resonant frequencies of a moving belt and a stationary one. If the stationary value were to be used when calculating the tension in the moving belt, this would lead to an error of 8% in the measurement.
  • One of the practical advantages of the monitoring systems described above is that they allow the possibility to monitor the condition of pulley and belt assemblies with a minimum number of sensors. This may be important if the assembly has a long belt and numerous pulleys and/or where some of the belt spans are inaccessible.
  • the system can also be used to monitor torque, because the difference in belt tension between adjacent spans is a measure of torque at the intervening pulley.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

Dans un système de courroie et de poulies, des capteurs (15, 16) sont prévus pour détecter les vibrations dans les portées (S1, S2) d'une courroie (10) se déplaçant autour de poulies (11, 12). Une excitation externe peut être appliquée sur la courroie au moyen d'un dispositif (13) doté d'un piston mobile (14). Les signaux provenant des vibrations induites dans les portées de la courroie sont envoyés à une unité de traitement de données (17) où ils sont collationnés et interprétés, de sorte qu'une analyse de l'état de la courroie et/ou des poulies soit assurée.
EP03782673A 2003-01-07 2003-12-19 Systeme de controle d'ensemble a courroie Withdrawn EP1581788A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0300306A GB2397129A (en) 2003-01-07 2003-01-07 Monitoring pulley and belt assembly
GB0300306 2003-01-07
PCT/GB2003/005614 WO2004061402A1 (fr) 2003-01-07 2003-12-19 Systeme de controle d'ensemble a courroie

Publications (1)

Publication Number Publication Date
EP1581788A1 true EP1581788A1 (fr) 2005-10-05

Family

ID=9950773

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03782673A Withdrawn EP1581788A1 (fr) 2003-01-07 2003-12-19 Systeme de controle d'ensemble a courroie

Country Status (4)

Country Link
EP (1) EP1581788A1 (fr)
AU (1) AU2003290314A1 (fr)
GB (1) GB2397129A (fr)
WO (1) WO2004061402A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009026962B4 (de) * 2009-06-16 2014-02-13 Zf Lenksysteme Gmbh Verfahren zur Messung einer Riemenspannung
GB2497100B (en) * 2011-11-30 2016-05-18 Schrader Electronics Ltd Dynamic belt monitoring apparatus and method
DE102013209139A1 (de) * 2013-05-16 2014-11-20 Krones Aktiengesellschaft Verfahren und Vorrichtung zur Herstellung von Umreifungsgebinden sowie Messanordnung zur Erfassung einer Bandspannung solcher Umreifungsgebinde
AT516047B1 (de) * 2014-08-01 2016-02-15 Kompetenzzentrum Das Virtuelle Fahrzeug Forschungsgmbh Verfahren und Vorrichtung zur Bestimmung der Eigenschaften von riemen- und kettengetriebenen Nebenaggregaten
US10488282B2 (en) * 2017-11-08 2019-11-26 Rockwell Automation Technologies, Inc. System and method for monitoring installation and health of belt driven motor/drive applications

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1286476A1 (ru) * 1985-05-27 1987-01-30 Институт Геотехнической Механики Ан Усср Способ определени состо ни конвейерной ленты
DE4033778A1 (de) * 1990-10-24 1992-04-30 Skf Gmbh Verfahren zum ermitteln der spannung von treibriemen
JPH08327477A (ja) * 1995-06-05 1996-12-13 Mitsubishi Electric Corp ベルト張力測定装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004061402A1 *

Also Published As

Publication number Publication date
GB2397129A (en) 2004-07-14
GB0300306D0 (en) 2003-02-05
AU2003290314A1 (en) 2004-07-29
WO2004061402A1 (fr) 2004-07-22

Similar Documents

Publication Publication Date Title
RU2537354C2 (ru) Способ и устройство контроля ходовых качеств рельсового транспортного средства
CN101842687B (zh) 用于确定和/或监测粘度的方法和相应的装置
CN101310427B (zh) 定子铁心松动诊断装置及定子铁心松动诊断方法
AU2012367144B2 (en) System and method for monitoring the condition of a conveyor belt
CN110320038A (zh) 滚动轴承的异常诊断方法以及异常诊断装置
US9267864B2 (en) Method for identifying damage on transmissions
US9097575B2 (en) Method and device for monitoring torsional vibrations of a rotary shaft of a turbine engine
JP2014530347A (ja) 自動車用シャシシステムにおける構成部品の欠陥診断方法及び装置
JPH10274558A (ja) 回転機器の異常診断方法およびその装置
CN106715310A (zh) 基于振动的电梯牵拉构件磨损和寿命监视系统
US7421349B1 (en) Bearing fault signature detection
US10782183B2 (en) Adaptive filtering of a load cell of a point-of-sale (POS) device
EP2019302A1 (fr) Procédé et système pour la détection sans contact du couple d'un arbre
US11548043B2 (en) Method for detecting and removing buildup on a component, system and computer program
JP5790586B2 (ja) エレベータのロープテンション測定方法及び装置
KR890013323A (ko) 터빈블레이드 약화 감시장치
DE102015106849A1 (de) Waschmaschine mit einem Beschleunigungssensor und Verfahren zum Betreiben einer Waschmaschine
EP1764602A2 (fr) Dispositif d'analyse de vibrations
EP3827235B1 (fr) Système de capteur de courroie
WO2013079530A1 (fr) Appareil et procédé de contrôle de courroie dynamique
JP4101381B2 (ja) 計量装置
WO2004061402A1 (fr) Systeme de controle d'ensemble a courroie
CN108692799B (zh) 消除辊筒转动干扰的检重系统和检重数据处理方法
CN110595758B (zh) 一种紧固件松动的预测方法及组合装置
US7878066B2 (en) Vibration measurement system

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20050802

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20060614