EP1440290A2 - Transducteur de mesure - Google Patents

Transducteur de mesure

Info

Publication number
EP1440290A2
EP1440290A2 EP02802603A EP02802603A EP1440290A2 EP 1440290 A2 EP1440290 A2 EP 1440290A2 EP 02802603 A EP02802603 A EP 02802603A EP 02802603 A EP02802603 A EP 02802603A EP 1440290 A2 EP1440290 A2 EP 1440290A2
Authority
EP
European Patent Office
Prior art keywords
signal
transmitter
control input
generation
error
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
Application number
EP02802603A
Other languages
German (de)
English (en)
Other versions
EP1440290B1 (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
Siemens Corp
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, Siemens Corp 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 - Lifetime legal-status Critical Current

Links

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 variable detected therewith into an electrical sensor signal, with a signal processing device which is designed to process the sensor signal to form a measuring signal and for generating an error signal, and with a data interface for transmitting the measuring signal and error signal.
  • a pressure transmitter has a pressure sensor, the sensor signal of which is amplified, digitized, evaluated and corrected for linearity and temperature behavior in a signal processing device provided in the transmitter.
  • the measurement signal prepared in this way is transmitted via a data interface, e.g. B. 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 is indicated on the transmitter, the error also being made available as digital diagnostic information on the data interface. In the case of a 4 ... 20 mA interface, the error can also be analog in the form of a
  • the invention has for its object to be able to report error events occurring outside the transmitter in a simple manner.
  • the object is achieved in that the transmitter of the type mentioned at the outset has a control input which is different from the data interface and via which the generation of the error signal can be triggered.
  • the error event detected outside the transmitter is therefore used to control the transmitter to generate an error message signal and transmit it via the data interface.
  • the generation of the error signal can preferably be triggered by short-circuiting the control input, so that no control signal has to be generated.
  • a current path in the control input can also be interrupted to generate the error signal.
  • the transmitter can preferably be operated with an additional device, the additional device having a monitoring device monitoring its functional state, which is connected to the control input of the transmitter. If the functional state of the additional device changes, in particular in the event of a functional failure, the transmitter then generates the associated error signal.
  • the monitoring device preferably contains a switch which can be actuated by a change in the functional state.
  • the switch can be a pressure, temperature, magnetically inductive or other switch which responds to the pressure exceeding or falling below a pressure, temperature, position or other limit value.
  • the additional device can be a diaphragm seal, with the monitoring device detecting a loss of the transmission fluid in the diaphragm seal.
  • a measuring transducer 1 here a pressure or differential pressure measuring transducer, has a sensor 2, with which a measured variable, here pressure, is converted into an electrical sensor signal 3.
  • a measured variable here pressure
  • the pressure is detected with the aid of a diaphragm seal 4 at a measuring point in a technical system and transmitted to the sensor 2 in a capillary 5 by means of a transmission liquid.
  • the sensor signal 3 is in a
  • Signal processing device 6 processed into a measurement signal 7 and then transferred to the communication system 9 of the technical system via a data interface 8.
  • the signal processing device 6 is able to detect hardware or software errors occurring in the transmitter, to display them on the transmitter 10 via a display 10, and also to provide the error as diagnostic information 11 on the data interface 8.
  • the diaphragm seal 4 has a monitoring device 12 with a pressure switch 13 which responds when the transmission fluid is lost and then closes.
  • the pressure switch 13 is connected to a separate control input 15 of the transmitter 1 via a two-wire control line 14.
  • the control input 15 is connected with one connection to the ground potential and the other connection via a resistor 16 to the supply voltage potential V + of the transmitter 1, so that a current flows through the resistor 16 when the pressure switch 13 is closed.
  • the resulting voltage drop across the resistor 16 drives a comparator 17, in the simplest case an AND gate, which triggers the signal processing device 6 in the sense of generating the error signal 11.
  • the pressure switch 13 can also work as a break contact, 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)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)

Abstract

L'invention concerne un transducteur de mesure comprenant un capteur destiné à convertir une grandeur de mesure détectée par ledit capteur en un signal électrique de capteur, un dispositif de traitement de signal conçu pour transformer ce signal de capteur en un signal de mesure et pour produire un signal d'erreur, ainsi qu'une interface de données permettant de transmettre le signal de mesure et le signal d'erreur. Selon l'invention, pour que les erreurs survenant à l'extérieur du transducteur de mesure (1) puissent être également signalées, et ce, de manière simple, le transducteur de mesure (1) comprend une entrée de commande (15), différente de l'interface de données (8), par l'intermédiaire de laquelle la génération du signal d'erreur (11) peut être déclenchée.
EP02802603A 2001-11-02 2002-10-31 Transducteur de mesure Expired - Lifetime 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 true EP1440290A2 (fr) 2004-07-28
EP1440290B1 EP1440290B1 (fr) 2013-01-30

Family

ID=7704486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02802603A Expired - Lifetime 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 (13)

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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
RU2331899C2 (ru) * 2003-08-07 2008-08-20 Роузмаунт Инк. Устройство обработки с цепью отключения
US7018800B2 (en) 2003-08-07 2006-03-28 Rosemount Inc. Process device with quiescent current diagnostics
US8180466B2 (en) 2003-11-21 2012-05-15 Rosemount Inc. Process device with supervisory overlayer
US7046180B2 (en) 2004-04-21 2006-05-16 Rosemount Inc. Analog-to-digital converter with range error detection
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, 80333 München 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03040657A3 *

Also Published As

Publication number Publication date
WO2003040657A2 (fr) 2003-05-15
US7054765B2 (en) 2006-05-30
EP1440290B1 (fr) 2013-01-30
WO2003040657A3 (fr) 2003-08-07
US20050017736A1 (en) 2005-01-27

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