EP1440290B1 - Transducteur de mesure - Google Patents

Transducteur de mesure Download PDF

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Publication number
EP1440290B1
EP1440290B1 EP02802603A EP02802603A EP1440290B1 EP 1440290 B1 EP1440290 B1 EP 1440290B1 EP 02802603 A EP02802603 A EP 02802603A EP 02802603 A EP02802603 A EP 02802603A EP 1440290 B1 EP1440290 B1 EP 1440290B1
Authority
EP
European Patent Office
Prior art keywords
signal
measuring transducer
error message
control input
transmitter
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.)
Expired - Fee Related
Application number
EP02802603A
Other languages
German (de)
English (en)
Other versions
EP1440290A2 (fr
Inventor
Hartmut Flämig
Andreas Muhr
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP1440290A2 publication Critical patent/EP1440290A2/fr
Application granted granted Critical
Publication of EP1440290B1 publication Critical patent/EP1440290B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage

Definitions

  • the invention relates to a measuring transducer with a sensor for converting a measured quantity detected thereby into an electrical sensor signal, with a signal processing device which is designed to process the sensor signal into a measuring signal and to generate an error message signal, and with a data interface for transmitting the measuring signal and error message signal.
  • a pressure transducer has a pressure sensor whose sensor signal is amplified, digitized, evaluated and corrected in terms of linearity and temperature behavior in a signal converter's own signal processing device.
  • the thus prepared measurement signal is transmitted via a data interface, eg., PROFIBUS or HART, the communication system of a technical system in which the transmitter is installed. If hardware or software errors occur in the transmitter, this will be displayed on the transmitter, with the error also being provided as digital diagnostic information at the data interface. In the case of a 4 ... 20 mA interface, the error can also be transmitted analogously in the form of a current value outside of this predetermined signal level range, in accordance with NAMUR recommendation NE43, for example.
  • B. as Downscale value of ⁇ 3.6 mA or as Upscale value of> 21 mA.
  • the patent US-A-5,874,895 discloses a transmitter with a data interface for the excitation of a measurement signal and an error message signal.
  • the invention has for its object to be able to easily report occurring outside the transmitter error events.
  • the object is achieved in that the measuring transducer of the type mentioned has a different from the data interface control input, via which the generation of the error message signal can be triggered.
  • the error signal detected outside the transmitter is thus used by the control input of the transmitter in order to generate an error message signal from it and transmit it via the data interface.
  • the generation of the error message signal is triggered by short-circuiting the control input, so no control signal must be generated.
  • a current path in the control input can be interrupted to generate the error message signal.
  • the transmitter is preferably operable with an auxiliary device, wherein the auxiliary device has a monitoring its functional state monitoring device which is connected to the control input of the transmitter. In the event of a change in the functional state of the auxiliary device, in particular in the event of a malfunction, the transmitter then generates the associated error message signal.
  • the monitoring device preferably contains a switch that can be actuated by a change in the functional state.
  • the switch may be a pressure, temperature, magnetic inductive or other switch, which responds to the exceeding or falling below a pressure, temperature, position or other limit.
  • the auxiliary device may be a pressure transmitter, wherein the monitoring device detects a loss of the transmission fluid in the pressure transmitter.
  • a transmitter 1, here a pressure or differential pressure transmitter has a sensor 2, with which a measured variable, Here pressure is converted into an electrical sensor signal 3.
  • the pressure is detected with the help of a pressure transmitter 4 at a measuring point in a technical system and transmitted by means of a transmission fluid in a capillary 5 to the sensor 2.
  • the sensor signal 3 is processed in a signal processing device 6 to a measurement signal 7 and then transferred via a data interface 8 to the communication system 9 of the technical system.
  • the signal processing device 6 is able to detect any hardware or software errors occurring in the transmitter, to display them via a display 10 on the transmitter and also to provide the error as diagnostic information 11 at the data interface 8.
  • the diaphragm seal 4 has a monitoring device 12 with a pressure switch 13, which responds to a loss of transmission fluid and then closes. Via a two-wire control line 14, the pressure switch 13 is connected to a separate control input 15 of the transmitter 1.
  • the control input 15 is connected with one terminal to the ground potential and the other terminal via a resistor 16 to the supply voltage potential V + of the transmitter 1, so that when closing the pressure switch 13, a current flows through the resistor 16.
  • a comparator 17 in the simplest case an AND gate, is controlled, which triggers the signal processing device 6 in the sense of generating the error message signal 11.
  • the pressure switch 13 can also operate as an opener, so that the current path in the control input 15 is not closed but opened for the error message.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Claims (6)

  1. Transducteur ( 1 ) de mesure, comprenant un capteur ( 2 ) pour la transformation d'une grandeur de mesure ainsi détectée en un signal ( 3 ) électrique de capteur, comprenant un dispositif ( 6 ) de traitement du signal, qui est constitué pour la transformation du signal ( 3 ) de capteur en un signal ( 7 ) de mesure et pour la production d'un signal ( 11 ) d'avertissement d'erreur, et comprenant une interface ( 8 ) de données pour la transmission du signal ( 7 ) de mesure et du signal ( 11 ) d'avertissement d'erreur, caractérisé en ce que le transducteur ( 1 ) de mesure a une entrée ( 13 ) de commande, qui est différente de l'interface ( 8 ) de données et par laquelle la production du signal ( 11 ) d'avertissement d'erreur peut être déclenchée.
  2. Transducteur suivant la revendication 1, caractérisé en ce que la production du signal ( 11 ) d'avertissement d'erreur peut être déclenchée en court-circuitant l'entrée ( 15 ) de commande.
  3. Transducteur suivant la revendication 1, caractérisé en ce que la production du signal ( 11 ) d'avertissement d'erreur peut être déclenchée par une ouverture d'un trajet de courant dans l'entrée ( 15 ) de commande.
  4. Transducteur suivant l'une des revendications précédentes, caractérisé en ce qu'il peut fonctionner avec un appareil ( 4 ) supplémentaire et en ce que l'appareil ( 4 ) supplémentaire a un dispositif ( 12 ) de contrôle, qui contrôle son état de fonctionnement et qui est raccordé à l'entrée ( 15 ) de commande du transducteur ( 1 ) de mesure.
  5. Transducteur suivant la revendication 4, caractérisé en ce que le dispositif ( 12 ) de contrôle comporte un interrupteur ( 13 ) pouvant être actionné par une modification de l'état de fonctionnement.
  6. Transducteur suivant la revendication 4 ou 5, caractérisé en ce que l'appareil ( 4 ) supplémentaire est un transmetteur de pression et en ce que le dispositif ( 12 ) de contrôle détecte une perte de liquide de transmission dans le transmetteur ( 4 ) de pression.
EP02802603A 2001-11-02 2002-10-31 Transducteur de mesure Expired - Fee Related EP1440290B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10153997 2001-11-02
DE10153997 2001-11-02
PCT/DE2002/004072 WO2003040657A2 (fr) 2001-11-02 2002-10-31 Transducteur de mesure

Publications (2)

Publication Number Publication Date
EP1440290A2 EP1440290A2 (fr) 2004-07-28
EP1440290B1 true EP1440290B1 (fr) 2013-01-30

Family

ID=7704486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02802603A Expired - Fee Related EP1440290B1 (fr) 2001-11-02 2002-10-31 Transducteur de mesure

Country Status (3)

Country Link
US (1) US7054765B2 (fr)
EP (1) EP1440290B1 (fr)
WO (1) WO2003040657A2 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10317859B4 (de) * 2003-04-16 2008-01-31 Endress + Hauser Gmbh + Co. Kg Verfahren zur Aufzeichnung von Messsignalen und entsprechende Vorrichtung
DE10336055B4 (de) * 2003-08-01 2006-11-09 Msa Auer Gmbh Schaltungsanordnung mit einer Mehrdrahtleitung zur Stromversorgung und zur Ausgabe messwertproportionaler elektrischer Stromsignale eines Sensors
US7280048B2 (en) 2003-08-07 2007-10-09 Rosemount Inc. Process control loop current verification
US7018800B2 (en) 2003-08-07 2006-03-28 Rosemount Inc. Process device with quiescent current diagnostics
WO2005017851A1 (fr) * 2003-08-07 2005-02-24 Rosemount Inc. Dispositif de traitement a priorite sur une boucle
US8180466B2 (en) 2003-11-21 2012-05-15 Rosemount Inc. Process device with supervisory overlayer
US7464721B2 (en) 2004-06-14 2008-12-16 Rosemount Inc. Process equipment validation
DE102005062259A1 (de) * 2005-12-24 2007-07-05 Mathias Bindzus Schutzschalter
DE102007062919A1 (de) * 2007-12-21 2009-06-25 Endress + Hauser Gmbh + Co. Kg Vorrichtung zur Diagnose und/oder Ermittlung von Betriebs- bedingungen und/oder von Umgebungsbedingungen eines Feldgeräts der Prozessautomatisierungstechnik
CA2655591A1 (fr) * 2009-02-17 2010-08-17 Wisemen Controls & Instrumentation Ltd. Lecteur de debitmetre de gaz
US9020768B2 (en) 2011-08-16 2015-04-28 Rosemount Inc. Two-wire process control loop current diagnostics
US10367612B2 (en) 2015-09-30 2019-07-30 Rosemount Inc. Process variable transmitter with self-learning loop diagnostics

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2077434B (en) * 1980-05-30 1984-04-26 Millar John Ascertaining flow rate through valves or pumps
DE3705901C2 (de) * 1987-02-24 1996-12-12 Siemens Ag Druckmeßwandler
US4799169A (en) * 1987-05-26 1989-01-17 Mark Industries, Inc. Gas well flow instrumentation
US5142483A (en) * 1990-04-24 1992-08-25 Caltechnix Corporation Pressure regulating system for positive shut-off pressure controller
US5874895A (en) * 1996-11-15 1999-02-23 International Business Machines Corporation Method and apparatus for testing operation of a sensor controlled device
US5925835A (en) * 1997-10-13 1999-07-20 Motorola, Inc. Method of and apparatus for testing a nozzle of a pick-and-place system
DE19757196A1 (de) * 1997-12-22 1999-06-24 Philips Patentverwaltung Sensoranordnung mit Meßfehlererkennung
DE29917651U1 (de) 1999-10-07 2000-11-09 Siemens Ag Meßumformer sowie Prozeßleitsystem
US6343498B1 (en) 1999-10-29 2002-02-05 Denso Corporation Physical quantity sensor having fault detection function
JP4103280B2 (ja) 1999-12-24 2008-06-18 株式会社デンソー 力学量センサ装置
US6871551B2 (en) * 2000-06-28 2005-03-29 Endress + Hauser Wetzer Gmbh + Co. Kg Apparatus for generating and conducting a fluid flow, and method of monitoring said apparatus

Also Published As

Publication number Publication date
US7054765B2 (en) 2006-05-30
WO2003040657A3 (fr) 2003-08-07
US20050017736A1 (en) 2005-01-27
EP1440290A2 (fr) 2004-07-28
WO2003040657A2 (fr) 2003-05-15

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