EP0891537A1 - Dispositif de connexion electrique d'un capteur de vibrations monte sur une machine a un appareil de mesure et d'evaluation - Google Patents

Dispositif de connexion electrique d'un capteur de vibrations monte sur une machine a un appareil de mesure et d'evaluation

Info

Publication number
EP0891537A1
EP0891537A1 EP97901572A EP97901572A EP0891537A1 EP 0891537 A1 EP0891537 A1 EP 0891537A1 EP 97901572 A EP97901572 A EP 97901572A EP 97901572 A EP97901572 A EP 97901572A EP 0891537 A1 EP0891537 A1 EP 0891537A1
Authority
EP
European Patent Office
Prior art keywords
memory
connection device
machine
connection
vibration sensor
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Withdrawn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
EP97901572A
Other languages
German (de)
English (en)
Inventor
Heinrich Lysen
Volker Konetschny
Dieter Franke
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.)
Prueftechnik Dieter Busch AG
Original Assignee
Prueftechnik Dieter Busch AG
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 Prueftechnik Dieter Busch AG filed Critical Prueftechnik Dieter Busch AG
Publication of EP0891537A1 publication Critical patent/EP0891537A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems

Definitions

  • the invention relates to a connecting device for the purpose specified in claim 1.
  • Vibration sensors are used for various purposes on a machine in order to convert the mechanical vibrations transmitted to them into corresponding electrical signals, which are then further processed in a measuring and evaluation device.
  • One such use is, for example, the monitoring of the bearing condition of rotary machines, which can be read from the size and type of the mechanical vibrations that occur or from the electrical signals supplied by the vibration sensor.
  • the invention has for its object to provide an electrical connection device for the purpose specified in the introductory part of claim 1, which without a mechanically acting coding elements that may be susceptible to faults. right, reliably recognizable by the evaluation device between the location from which the sensor signal comes in each case, and the sensor signal is able to produce.
  • the data characteristic of the measurement location are stored in a non-volatile electrical memory which is permanently assigned to the electrical connection device, so that they can be output in connection with the sensor signal after being called up to the measurement and evaluation device and thus between those received by the evaluation device Sensor signals and the origin of these signals, a correlation recognizable for the evaluation device can be established.
  • the electrical connecting device which is designed as a separate unit from the vibration sensor 2 in the exemplary embodiment, the transducer connection of the connecting device EV, via which it can be connected directly or via a connecting line 2a to the vibration transducer 2,
  • the device connection of the electrical connection device EV which can be connected to the measuring and evaluation device and is supplied under the control by the switching electronics 6 in a predetermined sequence on the one hand with the sensor signals and on the other hand with the memory content signals.
  • a fastening wall for the electrical connection device EV for example the wall of a protective housing surrounding the machine 1,
  • the vibration sensor 2 delivers the electrical signals corresponding to the mechanical vibrations transmitted to it, either directly or via a connecting line 2a to the sensor connection 3 of the electrical connection device EV, from where, after being called up by the measuring and evaluation device 12, it reaches the sensor device via the sensor connection 7 and a connecting line 12a are output, these sensor signals under the control of the switching electronics 6 for the measuring location, ie the mounting location of the vibration sensor 2, characteristic signals converted from the memory content (hereinafter referred to as location signals), from which the measuring and evaluation device are added 12 can recognize where the sensor signals come from.
  • location signals characteristic signals converted from the memory content
  • the memory 5 can preferably be read out serially, so that a two-wire line 12a is sufficient for the transmission of the sensor signals and the location signals to the measuring and evaluating device, which can be a coaxial line in connection with an embodiment of the measuring device connection 7 as a coaxial connector.
  • the switching electronics 6 works automatically when the measuring and evaluation device 12 is called up and applies the sensor signal and the location signals from the memory 5 to the measuring device connection 7 in a predetermined sequence.
  • the switchover between the sensor signals and the location signals from the memory 5 is preferably time-controlled.
  • the memory 5 is a non-volatile memory, which is preferably set up so that it can also be written on site.
  • a write authorization code is preferably also stored in the memory 5, which the operating personnel must use in order to gain access to the memory 5.
  • the memory 5 it is advisable to design the memory 5 in such a way that it can be read out and / or written to in series using pulse code modulation, and to provide for the pulse code-modulated memory signal in the electrical connection device EV to be converted into a digital current state for transmission to the measuring and evaluation device becomes what a suitable device can make in the electronics installed in the connecting device EV.
  • the two pulse code states one preferably has a length of ⁇ 15 ⁇ s and the other preferably a length of 15 to 60 ⁇ s.
  • the memory content is preferably designed as a consecutive unique serial number, which is unmistakable with the serial numbers of electrical connection devices for further sensors on the same or on different machines 1.
  • the data necessary for the correct interpretation of the sensor signals in the measuring and evaluation device 12 such as sensor type, sensitivity of the sensor in individual frequency ranges, etc.
  • the initial state of the machine and the history of the machine state are also stored in the memory 5, so that they can be called up from the memory by the measuring and evaluation device 12 if necessary.
  • the connecting device EV is shown as a separate unit from the transducer 2, connected to it via a line 2a, which is more or less large regardless of the attachment of the vibration transducer 2 to the machine 1 on a supporting wall 8 Distance is attachable.
  • the electrical connection device EV with the vibration sensor 2 to form a structural unit and then to fasten it together with the machine 1.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

Le dispositif décrit sert à connecter électriquement un capteur de vibrations (2) monté sur une machine (1) à un appareil éloigné de mesure et d'évaluation. Le dispositif de connexion (EV) est asocié à demeure au capteur de vibrations (2) et comprend une mémoire électrique rémanente (5) dont le contenu établit une association nette et permanente entre le signal du capteur de vibrations (2) et le site de mesure.
EP97901572A 1997-01-21 1997-01-21 Dispositif de connexion electrique d'un capteur de vibrations monte sur une machine a un appareil de mesure et d'evaluation Withdrawn EP0891537A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1997/000266 WO1998031994A1 (fr) 1997-01-21 1997-01-21 Dispositif de connexion electrique d'un capteur de vibrations monte sur une machine a un appareil de mesure et d'evaluation

Publications (1)

Publication Number Publication Date
EP0891537A1 true EP0891537A1 (fr) 1999-01-20

Family

ID=8166486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97901572A Withdrawn EP0891537A1 (fr) 1997-01-21 1997-01-21 Dispositif de connexion electrique d'un capteur de vibrations monte sur une machine a un appareil de mesure et d'evaluation

Country Status (2)

Country Link
EP (1) EP0891537A1 (fr)
WO (1) WO1998031994A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4237454A (en) * 1979-01-29 1980-12-02 General Electric Company System for monitoring bearings and other rotating equipment
DE3523289A1 (de) * 1985-06-28 1987-01-08 Busch Dieter & Co Prueftech Verfahren und vorrichtung zur ermittlung und auswertung von maschinenzustandsdaten
US5182543A (en) * 1990-09-12 1993-01-26 Board Of Trustees Operating Michigan State University Miniaturized data communication and identification system
US5255565A (en) * 1991-11-12 1993-10-26 Vibra-Metrics, Inc. Method and apparatus for monitoring multiple points on a vibrating structure
FR2712405B1 (fr) * 1993-11-09 1999-06-18 Cedom Sa Dispositif de mesure et de régulation d'ambiance à transmission hertzienne.
US6331823B1 (en) * 1995-11-06 2001-12-18 Reliance Electric Technologies, Llc Monitoring system for bearings

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9831994A1 *

Also Published As

Publication number Publication date
WO1998031994A1 (fr) 1998-07-23

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