EP0883097A2 - Dispositif pour la transmission de signaux entre un émetteur et un récepteur - Google Patents

Dispositif pour la transmission de signaux entre un émetteur et un récepteur Download PDF

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Publication number
EP0883097A2
EP0883097A2 EP98109740A EP98109740A EP0883097A2 EP 0883097 A2 EP0883097 A2 EP 0883097A2 EP 98109740 A EP98109740 A EP 98109740A EP 98109740 A EP98109740 A EP 98109740A EP 0883097 A2 EP0883097 A2 EP 0883097A2
Authority
EP
European Patent Office
Prior art keywords
voltage
transmitter
current
point
measured value
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
EP98109740A
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German (de)
English (en)
Other versions
EP0883097A3 (fr
EP0883097B1 (fr
Inventor
Peter KLÖFER
Jürgen KRÜGER
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.)
Endress and Hauser SE and Co KG
Original Assignee
Endress and Hauser SE and Co KG
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Filing date
Publication date
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Application filed by Endress and Hauser SE and Co KG filed Critical Endress and Hauser SE and Co KG
Publication of EP0883097A2 publication Critical patent/EP0883097A2/fr
Publication of EP0883097A3 publication Critical patent/EP0883097A3/fr
Application granted granted Critical
Publication of EP0883097B1 publication Critical patent/EP0883097B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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    • 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 an arrangement for signal transmission between a donor station and a receiving station, which are connected to each other by a two-wire line over which a variable between two limit values analog signal current is transmitted that one in represents the measured value detected by a sensor and that required for the operation of the donor agency Supply current forms, with the encoder unit a circuit has a constant operating voltage for the Generated donor position, and one in the donor position controllable power source is provided, which over the Two-wire current flowing depending on the Measured value determined.
  • the invention is therefore based on the object To design the arrangement of the type specified at the beginning, that the power available in the encoder is optimized becomes.
  • the one that generates the operating voltage for the encoder Circuit is a switching regulator, and that in the encoder position a voltage source is provided, the output voltage changes opposite to the signal current and which the Input voltage of the step-down switching regulator forms.
  • the switching regulator used in the arrangement according to the invention has the property that he applies the to him Converts input voltage into a constant output voltage, where, apart from internal losses, its output power equal to its performance on the input side is. This can increase the available input power be that its input voltage by changing the Output voltage of the voltage source opposite to Measured value is changed. In the presence of a low Measured value, which accordingly also a low signal current is the input voltage of the switching regulator increased while at a large reading, accordingly also results in a large signal current is reduced.
  • From DE-C-39 34 007 is the use of a switching regulator to generate the supply voltage for a Transducer circuit and a sensor known, but it is with this known arrangement, the input voltage is not possible of the switching regulator to influence the available Affect performance.
  • FIG. 1 shows schematically a transmitter point 10 which is connected to a receiving point 12 via a two-wire line 14.
  • the transmitter point 10 is a measuring point in which a measured value (for example temperature, pressure, humidity, fill level, flow) is detected with the aid of a sensor 16.
  • the encoder point 10 does not contain its own energy source, but obtains the supply current required for its operation via the two-wire line 14 from a voltage source 18 contained in the receiving point 12 14 transferred.
  • the measured value signal is a signal current I S flowing over the two-wire line 14, which can change between two predetermined values (usually the current values 4 mA and 20 mA).
  • the voltage source 18 supplies a direct voltage and the measuring current I S is a direct current.
  • the transmitter 10 already contains the data acquisition mentioned sensor 16 and a transducer circuit connected to it 20, the outputs 22 and 24 two each outputs detected measured value signals. The purpose these two signals will be explained later.
  • the receiving point 12 contains an evaluation circuit 26 which obtains the measured value information from the signal current I S transmitted via the two-wire line 14.
  • a measuring resistor 28 is inserted into the two-wire line, at which a voltage U M is generated which is proportional to the signal current I S transmitted via the two-wire line and which is fed to the evaluation circuit 26.
  • a resistor 30 is also shown in the receiving point 12, which, in addition to the resistor 28, represents the load which is on the two-wire line 14 on the receiver side.
  • the signal current I S is set in the transmitter 10 by a controllable current source 32, to which the signal emitted by the transducer circuit 20 at the output 24 is supplied as a control signal for the signal current I S to be determined. Depending on the measured value recorded in each case, the signal current I S flowing in the two-wire line is determined by a corresponding control of the current source 32.
  • the donor station contains 10 a controllable voltage source 34 and a switching regulator 36, whose task is to maintain a constant operating voltage for the transducer circuit 20 and the sensor 16 too produce.
  • the input voltage for the switching regulator 36 is supplied by the voltage source 34, the value of the Output voltage of this voltage source 34 with the help of the transducer circuit 20 at the output 22 signal can be controlled.
  • the use of the switching regulator 36 in connection with the controllable voltage source 34 makes it possible to always provide the measuring transducer circuit 20 and the sensor 16 with the highest possible power.
  • the switching regulator 36 ensures that, despite an increase in its input voltage, the operating voltage of the transducer circuit 20 and the sensor 16 is kept at a constant value, so that a higher input power is available by increasing the input voltage on the switching regulator 36, which therefore also has a allows higher output power.
  • the signal current I S also assumes the lower value of the signal current range, in the example given above, the value of 4 mA, so that the input power at the switching regulator 36 also has a low value Value would assume, since it is formed by the product of signal current and input voltage.
  • the output voltage of the voltage source 34 can be increased by the control signal from the transducer circuit 20, so that the power available at the input of the switching regulator 36 is also increased. This increased power is then also available for the operation of the transducer circuit 20 and the sensor 16.
  • the control voltage from the transducer circuit 20 is used to reduce the input voltage generated by the voltage source 34 at the input of the switching regulator 36, because in this case because of the high Signal current I S enough power for the operation of the transducer circuit 20 and the sensor 16 is available.
  • the limits within which the voltage set by the voltage source 34 can be changed depending on the measured value detected in each case depends on several factors, such as the output voltage of the supply voltage source 18, the load formed in the measuring resistor 28 and the resistor 30 in the receiver point 12 and on the minimum Terminal voltage U K from which must be present at the encoder point 10 for its proper operation.
  • FIG. 2 shows a diagram which shows how the voltage U e generated by the voltage source 34 and the signal current I S change depending on the measured value M.
  • the measured value M is shown standardized; its smallest value has the standardized value 0 and its largest value has the standardized value 1.
  • the signal current I S has the value 4 mA for the minimum measured value and 20 mA for the maximum measured value.
  • the input voltage U e changes from 12 V at the minimum measured value to 10 V at the maximum measured value.
  • FIG. 3 shows a further embodiment of the arrangement to be described here.
  • the voltage source 34 is not controlled by an output signal of the transducer circuit 20, but rather directly by the terminal voltage U k at the transmitter point.
  • This terminal voltage can be used for this purpose, since it is also clearly related to the measured value detected by the sensor 16, which leads to the setting of the signal current I S.
  • the signal current I S which also flows in the receiver station 12, in turn determines the terminal voltage U k on the basis of the voltage drops in the receiver station.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
EP98109740A 1997-06-05 1998-05-28 Dispositif pour la transmission de signaux entre un émetteur et un récepteur Revoked EP0883097B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19723645 1997-06-05
DE19723645A DE19723645B4 (de) 1997-06-05 1997-06-05 Anordnung zur Signalübertragung zwischen einer Geberstelle und einer Empfangsstelle

Publications (3)

Publication Number Publication Date
EP0883097A2 true EP0883097A2 (fr) 1998-12-09
EP0883097A3 EP0883097A3 (fr) 1999-02-17
EP0883097B1 EP0883097B1 (fr) 2003-03-19

Family

ID=7831521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98109740A Revoked EP0883097B1 (fr) 1997-06-05 1998-05-28 Dispositif pour la transmission de signaux entre un émetteur et un récepteur

Country Status (4)

Country Link
US (1) US6140940A (fr)
EP (1) EP0883097B1 (fr)
JP (1) JP2960717B2 (fr)
DE (2) DE19723645B4 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29917651U1 (de) * 1999-10-07 2000-11-09 Siemens Ag Meßumformer sowie Prozeßleitsystem
DE19919084A1 (de) * 1999-04-27 2000-11-16 Micronas Intermetall Gmbh Zweidrahtsensoreinrichtung
WO2000075904A1 (fr) * 1999-06-08 2000-12-14 Krohne Messtechnik Gmbh & Co. Kg Circuit pour la saisie, la transmission et l'exploitation de valeurs de mesures
DE10034684A1 (de) * 2000-07-17 2002-01-31 Endress Hauser Gmbh Co Meßeinrichtung zur Messung einer Prozeßvariablen
EP1158274B1 (fr) * 2000-05-19 2009-02-18 Endress + Hauser Flowtec AG Sources de courant controllées pour mesureurs bifilaires
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
WO2010014102A1 (fr) * 2008-07-31 2010-02-04 Micro Motion, Inc. Instrument de bus et procédé de limitation prédictive de la consommation d'énergie dans un bus d'instrumentation à deux fils
EP2346011A1 (fr) * 2009-10-21 2011-07-20 Asahi Kasei Microdevices Corporation Émetteur bifilaire
EP2439711A1 (fr) * 2010-10-05 2012-04-11 Yokogawa Electric Corporation Transmetteur à deux fils
WO2013097989A1 (fr) * 2011-12-27 2013-07-04 Endress+Hauser Gmbh+Co. Kg Dispositif de détermination et/ou de surveillance d'une valeur limite d'une grandeur de procédé
WO2015090758A1 (fr) * 2013-12-18 2015-06-25 Endress+Hauser Gmbh+Co. Kg Appareil de terrain permettant de détecter ou de surveiller un paramètre de processus physique ou chimique d'un fluide

Families Citing this family (34)

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Publication number Priority date Publication date Assignee Title
EP0524630B1 (fr) * 1991-07-24 1997-11-19 Matsushita Electric Industrial Co., Ltd. Composition destinée à être utilisée dans un film conducteur transparent et procédé de fabrication d'un tel film
US6930956B2 (en) * 2002-01-18 2005-08-16 Siemens Milltronics Process Instruments, Inc. Current loop control circuit for a time of flight ranging system
CA2374795A1 (fr) * 2002-03-05 2003-09-05 Siemens Milltronics Process Instruments Inc. Limiteur de courant a faible chute de tension permettant la protection contre les transitoires et la protection par fusible
EP1471641A1 (fr) * 2003-04-25 2004-10-27 Siemens Aktiengesellschaft Circuit de contrôle d'entrée pour un appareil électrique
US20060265105A1 (en) * 2005-05-20 2006-11-23 Hughes Albert R Loop-powered field instrument
US7480487B2 (en) * 2005-05-20 2009-01-20 Dresser, Inc. Power regulation for field instruments
RU2404527C2 (ru) * 2006-04-28 2010-11-20 Майкро Моушн, Инк. Интерфейс и способ питания контура шины
ATE486341T1 (de) * 2006-05-12 2010-11-15 Nxp Bv Stromschnittstelle mit einem an einen zusätzlichen pin angeschlossenen sperrkondensator
DE102007021099A1 (de) 2007-05-03 2008-11-13 Endress + Hauser (Deutschland) Ag + Co. Kg Verfahren zum Inbetriebnehmen und/oder Rekonfigurieren eines programmierbaren Feldmeßgeräts
DE102007035710A1 (de) * 2007-07-30 2009-02-05 Siemens Ag Messumformer und Stellungsregler zum Anschließen an eine Zweileiter-Stromschleife sowie deren Verwendung
ATE461369T1 (de) * 2007-10-24 2010-04-15 Festo Ag & Co Kg Fluidische ventilanordnung mit wenigstens einem elektromagnetventil und einem identifikationsdatenspeicher
DE102007058608A1 (de) 2007-12-04 2009-06-10 Endress + Hauser Flowtec Ag Elektrisches Gerät
DE102008022373A1 (de) 2008-05-06 2009-11-12 Endress + Hauser Flowtec Ag Meßgerät sowie Verfahren zum Überwachen eines Meßgeräts
DE102009024853A1 (de) 2008-06-12 2009-12-17 Abb Technology Ag Fernmesstechnische Einrichtung mit einem schleifengespeisten Gerät und Verfahren zu dessen Betriebsspannungsversorgung
RU2449378C1 (ru) * 2008-07-31 2012-04-27 Майкро Моушн, Инк. Инструмент шины и способ для прогнозируемого ограничения энергопотребления в двухпроводной инструментальной шине
DE102008043178A1 (de) * 2008-10-24 2010-04-29 Endress + Hauser Wetzer Gmbh + Co. Kg Feldgerät der Prozessautomatisierungstechnik
DE102008043199A1 (de) * 2008-10-27 2010-04-29 Endress + Hauser Process Solutions Ag Autarkes Feldgerät
DE102009005220A1 (de) * 2009-01-20 2010-04-22 Continental Automotive Gmbh Konstante Laststrommodulation für Sensoren
DE102009014252A1 (de) 2009-03-20 2010-09-23 Siemens Aktiengesellschaft Feldgerät zur Prozessinstrumentierung
EP2561603B1 (fr) 2010-04-19 2019-09-04 Endress+Hauser Flowtec AG Circuit d'excitation pour un transformateur de mesure ainsi que système de mesure formé avec celui-ci
DE202010006553U1 (de) 2010-05-06 2011-10-05 Endress + Hauser Flowtec Ag Elektronisches Meßgerät mit einem Optokoppler
DE102010030924A1 (de) 2010-06-21 2011-12-22 Endress + Hauser Flowtec Ag Elektronik-Gehäuse für ein elektronisches Gerät bzw. damit gebildetes Gerät
DE102010062310A1 (de) 2010-12-01 2012-06-06 Siemens Aktiengesellschaft Schaltungsanordnung zur Übertragung eines Digitalsignals mit einem Optokoppler
DE102011050007B4 (de) * 2011-04-29 2015-10-22 Samson Ag Stellungsregler
DE102011076838A1 (de) 2011-05-31 2012-12-06 Endress + Hauser Flowtec Ag Meßgerät-Elektronik für ein Meßgerät-Gerät sowie damit gebildetes Meßgerät-Gerät
DE102013100799A1 (de) 2012-12-21 2014-06-26 Endress + Hauser Flowtec Ag Umformerschaltung mit einer Stromschnittstelle sowie Meßgerät mit einer solchen Umformerschaltung
DE102013109096A1 (de) 2013-08-22 2015-02-26 Endress + Hauser Flowtec Ag Gegen Manipulation geschütztes elektronisches Gerät
DE102014108107A1 (de) 2014-06-10 2015-12-17 Endress + Hauser Flowtec Ag Spulenanordnung sowie damit gebildeter elektromechanischer Schalter bzw. Meßumformer
DE102016114860A1 (de) 2016-08-10 2018-02-15 Endress + Hauser Flowtec Ag Treiberschaltung sowie damit gebildete Umformer-Elektronik bzw. damit gebildetes Meßsystem
DE102017102678A1 (de) 2017-02-10 2018-08-16 Endress+Hauser SE+Co. KG Feldgerät zur Bestimmung eines Grenzwertes
DE102017130775A1 (de) 2017-12-20 2019-06-27 Endress+Hauser SE+Co. KG Feldgeräteelektronik für ein Feldgerät der Automatisierungstechnik
JP7010205B2 (ja) 2018-12-25 2022-01-26 横河電機株式会社 ２線式伝送器
DE102019201322A1 (de) * 2019-02-01 2020-08-06 Vega Grieshaber Kg Analog-Digitaler Mischbetrieb für einen Sensoreingang
DE102022119145A1 (de) 2022-07-29 2024-02-01 Endress+Hauser Flowtec Ag Anschlussschaltung für ein Feldgerät und Feldgerät

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DE3934007A1 (de) * 1989-03-31 1990-10-04 Fischer & Porter Co Zweidraht-fernmesseinrichtung
WO1994020940A1 (fr) * 1993-03-03 1994-09-15 Milltronics Ltd. Emetteur de commande de traitement a alimentation en boucle

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FR2629609B1 (fr) * 1988-03-31 1990-12-28 Jacques Lewiner Perfectionnements aux circuits electroniques d'interrogation
DE4412388A1 (de) * 1994-06-08 1995-12-14 Hoenicke Helmut Prof Dipl Ing Leistungssparende Elektronikschaltung zur Stromversorgung elektro-pneumatischer Stellungsregler mit Mikrocontroller
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WO1994020940A1 (fr) * 1993-03-03 1994-09-15 Milltronics Ltd. Emetteur de commande de traitement a alimentation en boucle

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19919084A1 (de) * 1999-04-27 2000-11-16 Micronas Intermetall Gmbh Zweidrahtsensoreinrichtung
DE19919084C2 (de) * 1999-04-27 2001-05-31 Micronas Gmbh Zweidrahtsensoreinrichtung
US6437581B1 (en) 1999-04-27 2002-08-20 Micronas Gmbh Two wire sensor device
WO2000075904A1 (fr) * 1999-06-08 2000-12-14 Krohne Messtechnik Gmbh & Co. Kg Circuit pour la saisie, la transmission et l'exploitation de valeurs de mesures
US6577989B2 (en) 1999-06-08 2003-06-10 Krohne Messtechnik Gmbh & Co., K.G. Circuit arrangement for measured value detection, transfer and analysis
DE29917651U1 (de) * 1999-10-07 2000-11-09 Siemens Ag Meßumformer sowie Prozeßleitsystem
EP1158274B1 (fr) * 2000-05-19 2009-02-18 Endress + Hauser Flowtec AG Sources de courant controllées pour mesureurs bifilaires
DE10034684A1 (de) * 2000-07-17 2002-01-31 Endress Hauser Gmbh Co Meßeinrichtung zur Messung einer Prozeßvariablen
US6512358B2 (en) 2000-07-17 2003-01-28 Endress + Hauser Gmbh + Co. Measuring device for measuring a process variable
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
WO2010014102A1 (fr) * 2008-07-31 2010-02-04 Micro Motion, Inc. Instrument de bus et procédé de limitation prédictive de la consommation d'énergie dans un bus d'instrumentation à deux fils
US8595519B2 (en) 2008-07-31 2013-11-26 Micro Motion, Inc. Bus instrument and method for predictively limited power consumption in a two-wire instrumentation bus
EP2346011A1 (fr) * 2009-10-21 2011-07-20 Asahi Kasei Microdevices Corporation Émetteur bifilaire
EP2346011A4 (fr) * 2009-10-21 2014-04-30 Asahi Kasei Microdevices Corp Émetteur bifilaire
EP2439711A1 (fr) * 2010-10-05 2012-04-11 Yokogawa Electric Corporation Transmetteur à deux fils
US8718152B2 (en) 2010-10-05 2014-05-06 Yokogawa Electric Corporation Two-wire transmitter
WO2013097989A1 (fr) * 2011-12-27 2013-07-04 Endress+Hauser Gmbh+Co. Kg Dispositif de détermination et/ou de surveillance d'une valeur limite d'une grandeur de procédé
CN104024809A (zh) * 2011-12-27 2014-09-03 恩德莱斯和豪瑟尔两合公司 用于确定和/或监测过程变量的界限值的装置
US10067081B2 (en) 2011-12-27 2018-09-04 Endress + Hauser Gmbh + Co. Kg Apparatus for determining and/or monitoring a limit value of a process variable
WO2015090758A1 (fr) * 2013-12-18 2015-06-25 Endress+Hauser Gmbh+Co. Kg Appareil de terrain permettant de détecter ou de surveiller un paramètre de processus physique ou chimique d'un fluide
CN105900023A (zh) * 2013-12-18 2016-08-24 恩德莱斯和豪瑟尔两合公司 检测或监测介质的物理或化学过程变量的现场设备

Also Published As

Publication number Publication date
JPH1116082A (ja) 1999-01-22
JP2960717B2 (ja) 1999-10-12
EP0883097A3 (fr) 1999-02-17
EP0883097B1 (fr) 2003-03-19
US6140940A (en) 2000-10-31
DE19723645B4 (de) 2006-04-13
DE59807514D1 (de) 2003-04-24
DE19723645A1 (de) 1998-12-10

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