EP1103038B1 - Circuit pour la saisie, la transmission et l'exploitation de valeurs de mesures - Google Patents

Circuit pour la saisie, la transmission et l'exploitation de valeurs de mesures Download PDF

Info

Publication number
EP1103038B1
EP1103038B1 EP00943787A EP00943787A EP1103038B1 EP 1103038 B1 EP1103038 B1 EP 1103038B1 EP 00943787 A EP00943787 A EP 00943787A EP 00943787 A EP00943787 A EP 00943787A EP 1103038 B1 EP1103038 B1 EP 1103038B1
Authority
EP
European Patent Office
Prior art keywords
measured value
current
circuit
voltage
current regulator
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 - Lifetime
Application number
EP00943787A
Other languages
German (de)
English (en)
Other versions
EP1103038A1 (fr
Inventor
Wilhelm Florin
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.)
Krohne Messtechnik GmbH and Co KG
Original Assignee
Krohne Messtechnik GmbH and Co KG
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 Krohne Messtechnik GmbH and Co KG filed Critical Krohne Messtechnik GmbH and Co KG
Publication of EP1103038A1 publication Critical patent/EP1103038A1/fr
Application granted granted Critical
Publication of EP1103038B1 publication Critical patent/EP1103038B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 circuit arrangement for measured value acquisition, transmission and evaluation, comprising a Meßwerter initiatedsteil, with a Meßwertaustechnischsteil and with an existing only one outgoing line and a return line connection between the Meßwerter conductedsteil and Meßwertaustechnischsteil, wherein the Meßwerter executedsteil a transducer, a Meßwandlerscnies, a switching regulator upstream of the switching regulator and a switching regulator upstream power controller, wherein the Meßwertausêt has a voltage source and an evaluation circuit and wherein the switching regulator provides a constant operating voltage for the Meßwandlerscnies and the current controller, controlled by the Meßwandlerscnies, representing the measured value, via the forward line and the return line sets flowing Meßwertund supply current, the current consumption of the transducer circuit is controllable and by a short itige reduction of the current consumption of the transducer circuit is controlled so that the voltage drop across the current controller is as small as possible and wherein parallel to the input of the switching regulator
  • circuit arrangements of the type in question are designed and designed such that the voltage source located in the measured value evaluation part is a DC voltage source, that is to say the measured value and supply current is a direct current.
  • These circuits are also often designed and designed so that the Meßwert- and supply current between a lower limit, namely 4 mA, and an upper limit, namely 20 mA, represents the measured value; the lower limit of 4 mA thus represents the smallest measured value, the upper limit of 20 mA the largest measured value (see the German Patent 39 34 007 , Page 2, lines 19 to 24).
  • the circuit arrangement in question is one in which the voltage source provided in the measured value evaluation part is a DC voltage source, that is to say the measured value and supply current is a direct current. This is also the reason why the connection between the measured value detecting part and the measured value evaluating part has already been described as being composed of an outgoing line and a return line. Incidentally, the technical current direction is always assumed below; In a circuit connected to a DC voltage source, therefore, the DC current flows from the positive pole of the DC voltage source via the circuit to the negative pole of the DC voltage source.
  • the part of the circuit in question which is previously and subsequently designated with Meßwerter conductedsteil is also known as a transmitting station (see, the German Patent 39 34 007 ) or as a donor agency (see European Published Application 0 744 724 and the German Offenlegungsschrift 197 23 645 ), while the part of the circuit in question referred to herein as Meßwertaustechnischsteil also as a receiving station (see, the German Patent 39 34 007 ) or as the place of receipt (see European Published Application 0 744 724 and the German Offenlegungsschrift 197 23 645 ) referred to as.
  • connection between the measured value detection part and the measured value evaluation part which is made according to the terminology used here, consisting of an outgoing line and a return line, is also referred to as a two-wire line (see German Patent Specification 39 34 007 , the European disclosure 0 744 724 and the German Offenlegungsschrift 197 23 645 ).
  • the Meßwandlerscnies - with the associated transducer - actually the most functionally important part.
  • an operating state may occur in which the measured value and supply current can not be set proportionally to the measured value.
  • the present invention is therefore based on the object to provide a circuit arrangement which does not have the problem described above.
  • Fig. 1 and 2 Circuit arrangements are determined and suitable for measured value acquisition, transmission and evaluation and consist in their basic structure of a Meßwerter initiatedsteil 1, from a Meßwertaustechnischsteil 2 and from a - consisting of only one forward line 3 and 4 from a return line - connection 5 between the Meßwerter initiatedsteil 1 and the measured value evaluation part 2.
  • the measured value evaluation part 2 includes a voltage source 10 and an evaluation circuit 11.
  • the evaluation circuit 11 is parallel to the resistor 13; the evaluation circuit 11 is thus supplied to the resistor 13 resulting, the Meßwert- and supply current proportional voltage drop.
  • the switching regulator 8 supplies a - at least substantially - constant operating voltage for the transducer circuit 7.
  • the switching regulator 8 supplies a - at least substantially - constant operating voltage for the transducer circuit 7.
  • the current controller 9 is controlled by the transducer circuit 7. By the current controller 9 a measuring value representing, on the forward line 3 and the return line 4 flowing Meßwert- and supply current is set.
  • the circuit part referred to here with current controller is also referred to as a controllable current source, so at least in the European published patent application 0 744 724 and in the German Offenlegungsschrift 127 23 645 , Instead of the term current controller, the term current controller is also used.
  • the voltage source 10, the resistor 12, the forward line 3, the current regulator 9, the primary side of the switching regulator 8, the return line 4 and the resistor 13 are connected in series; they form a first circuit.
  • the secondary side of the switching regulator 8 and the transducer circuit 7 form a second circuit.
  • Equation 13 shows that the power P 5 available to the transducer circuit 7 can be optimized by the highest possible voltage U 4 . Since the voltage U 4 can not be greater than the voltage U 3 , the difference between the voltage U 3 and the voltage U 4 must be as small as possible. "As small as possible” - instead of "zero” - takes into account that the current controller 9 functionally necessary to, under the control of the transducer circuit 7, representing the measured value To be able to adjust the measured value and supply current I 3 requires a minimum difference between the voltage U 3 and the voltage U 4 .
  • the switching regulator 8 Since, according to the presupposition, the switching regulator 8 has no power loss, the primary-side power P 4 is equal to the secondary-side power P 5 , since the primary-side current I 4 of the switching regulator 8 is preset in the steady state, namely equal to the measured value and supply current predetermined by the transducer circuit 7 I 3 , and since the secondary-side voltage U 5 of the switching regulator 8 is constant, a short-term reduction of the current consumption of the transducer circuit 7, ie a short-term reduction of the current flowing through the transducer circuit 7 and the secondary side through the switching regulator 8 current I 5 , leading to an increase the voltage U 4 on the primary side of the switching regulator 8, since the current I 3 , now greater than the current I 4 , can no longer be absorbed by the switching regulator 8.
  • the switching regulator 8 has a capacitor 16 on the input side.
  • a switching regulator 8 is, for example, the switching regulator LT 1176-5 of the company Linea Technology.
  • the capacitor 16 simplifies the control of the voltage U 4 , as a result, the rate of change of the voltage U 4 at a setting of I 3 unlike I 4 can be greatly reduced.
  • the Meßwert- and supply current I 3 which should be proportional to the measured value, composed of the current I 4 via the first current regulator 9 and the current I 6 via the second current controller 17. Consequently, can also be in the previously described Operating status Set the required measured value and supply current I 3 .
  • the transducer circuit 7 to control their current consumption and / or to control the second current regulator 17 be parameterized, z. B. via the voltage U 1 of the voltage source 10 and / or via the resistors 12 and 13 in the Meßwertaustechnischsteil 2 and / or via the resistors 14, 15 of the forward line 3 and / or the return line 4 and / or on the capacity of the input of the switching regulator 8 in parallel capacitor 16. It is also possible, the voltage drop across the first current controller 9, z. B. via an A / D converter, not shown, to control the current consumption of the transducer circuit 7 and / or to control the second current regulator 17 in the transducer circuit 7 introduce.
  • characteristic curves are shown which show the voltage U 3 at the input of the current regulator 9 as a function of the current I 3 flowing through the measured value acquisition part 1.
  • the characteristic a is a voltage U 1 of 24 V and a resistance of the connection 5 of 300 ⁇
  • the characteristic b is a voltage U 1 of 24 V and a resistance of the compound 5 of 50 ⁇
  • the characteristic c has a voltage U 1 of 17 V and a resistance of the connection 5 of 50 ⁇ .
  • the characteristic a - for a voltage U 1 of 24 V and a resistance of the connection of 300 ⁇ - is particularly widespread, since this characteristic complies with the requirements of intrinsic safety in explosion protection.
  • the voltage U 4 at the output of the current regulator 9 is one volt below the voltage U 3 at the input of the current regulator 9.
  • the corresponding characteristic curve d is in Fig. 4 - together with the characteristic a off Fig. 3 - shown.
  • the current regulator 9 is also necessary because the current I 5 flowing through the transducer circuit 7 can not be controlled as accurately as is necessary for the current I 3 representing the measured value.
  • the current controller 9 is controlled by the transducer circuit 7 so that it adjusts a measuring value representing, flowing through the connection 5 Meßwert- and supply current, the current I 3rd
  • the circuit arrangement according to the invention can be used for a variety of very different transducers 6.
  • the transducer 6 can, for. B. be designed for temperature, pressure, humidity, level or flow detection.
  • the transducer 6 can be operated clocked, whereby the current consumption of the transducer circuit 7 can be influenced as a whole.
  • Such a clockwise operation is z. B. in a magnetic-inductive flowmeter known (see U.S. Patent 4,766,770 ); also a microwave radar as a transducer 6 can be operated clocked.
  • the current regulator 9 must provide smoothing; a pulse-like characteristic of the current I 3 , that is, the measured value and supply current representing the measured value, namely, is not desirable.
  • the extent of the necessary smoothing also determines the voltage drop across the current regulator 9 necessary for the operation, that is to say the voltage difference between the voltage U 3 and the voltage U 4 .
  • the present in the circuit arrangement according to the invention is particularly clear when considering two extreme cases, on the one hand the extreme case that the value changes abruptly from 100% to 0%, on the other hand, the extreme case that the measured value changes suddenly from 0% to 100% , Equal to these extreme cases are the so-called failure information, which is characterized by a current I 3 , which is either less than 3.6 mA or greater than 21 mA.
  • failure information which is characterized by a current I 3 , which is either less than 3.6 mA or greater than 21 mA.
  • NAMUR recommendation NE 43 standardization of the signal level for the failure information of digital transducers with analog output signal
  • version: 18.01 1994, first edition: 18.01.1994 distributed by the NAMUR office, c / o Bayer AG, building K 9, 51368 Leverkusen.
  • FIG Fig. 5 first shows the characteristics a and d, in addition to the operating points 1, 2 and 3 are drawn.
  • the current I 4 would immediately greater than the current I 3 , and it would take 16 charge from the capacitor. This in turn would lead to a reduction of the voltage U 4 and thus to a shift of the operating point 2 in the undesired direction, namely to a smaller voltage U 4 .
  • the desired operating point 3 is reached when the current I 5 is reduced.
  • the current I 4 is immediately smaller than the current I 3 .
  • the capacitor 16 at the input of the switching regulator 8 is charged and the voltage U 4 increases.
  • the in Fig. 2 illustrated second current controller 17 is required, which can set the corresponding current I 3 , in this case 20 mA. With the additional power controller 17 so the operating point 3 is possible.
  • the second current controller 17 is therefore not absolutely necessary, but only if the voltage U 4 can not be reduced at the same rate of change as the measured value can change.
  • the control automatically transitions from the current regulator 9 to the second current regulator 17. This can be done via the microcontroller 18 or by a corresponding hardware.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Control Of Voltage And Current In General (AREA)
  • Control Of Electrical Variables (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
  • Dc Digital Transmission (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

L'invention concerne un circuit pour la saisie, la transmission et l'exploitation de valeurs de mesure, comprenant une unité (1) de saisie de valeurs, une unité (2) d'exploitation de valeurs, et une connexion (5) entre l'unité (1) de saisie des valeurs et l'unité (2) d'exploitation des valeurs, composée d'une seule ligne d'aller (3) et d'une seule ligne de retour (4). L'unité (1) de saisie des valeurs comporte un capteur (6) de valeurs, un transformateur (7) de mesure, un régulateur à commutation (8) couplé en amont du transformateur (7) de mesure et un variateur (9) de courant placé en amont du régulateur à commutation (8). L'unité (2) d'exploitation des valeurs comporte une source (10) de tension et un circuit (11) d'exploitation. Le régulateur à commutation (8) fournit une tension de fonctionnement constante pour le transformateur (7) de mesure, et le variateur (9) de courant, commandé par le transformateur (7) de mesure, règle un courant de mesure et d'alimentation, représentant la valeur de mesure et porté par la ligne d'aller (3) et par la ligne de retour (4). Selon l'invention, la puissance disponible pour le transformateur (7) de mesure est optimisée par le fait que la consommation de courant du transformateur (7) de mesure peut être commandée. Cette dernière est commandée de manière que la chute de tension sur le variateur (9) de courant soit la plus petite possible.

Claims (8)

  1. Circuit d'acquisition, de transmission et d'évaluation de données, comprenant une partie d'acquisition de données (1), une partie d'évaluation de données (2) et une connexion (5) uniquement constituée d'une ligne de sortie (3) et d'une ligne de retour (4) entre la partie d'acquisition de données dans (1) et la partie d'évaluation de données (2), dans lequel la partie d'acquisition de données (1) comprend un capteur de mesure (6), un circuit transducteur de mesure (7), un régulateur à commutation (8) connecté en amont du circuit transducteur de mesure (7) et un régulateur de courant (9) connecté en amont du régulateur de commutation (8), dans lequel la partie d'évaluation de données (2) comprend une source de tension (10) et un circuit d'évaluation (11), dans lequel le régulateur de commutation (8) délivre une tension de fonctionnement constante au circuit transducteur de mesure (7) et le premier régulateur de courant (9), 1 commandé par le circuit transducteur de mesure (7), règle un courant de mesure et d'alimentation qui représente la mesure et qui passe sur la ligne de sortie (3) et la ligne de retour (4), la consommation de courant du circuit transducteur de mesure (7) peut être commandée et est commandée par une réduction de courte durée de le consommation de courant du circuit transducteur de mesure (7) de telle sorte que la chute de tension aux bornes du régulateur de courant (9) soit aussi fable que possible et dans lequel un condensateur (16) est connecté en parallèle à l'entrée du régulateur de commutation (8),
    caractérisé en ce que qu'il est prévu un second régulateur de courant (17) uniquement activé en cas de besoin et commandé par le circuit transducteur de mesure (7), et en ce que le second régulateur de courant (17) est connecté par son entrée à l'entrée du premier régulateur de courant (9) et par sa sortie à la ligne de retour (4).
  2. Circuit selon la revendication 1, caractérisé en ce que le circuit transducteur de mesure (7) est paramétrable pour commander sa consommation de courant et/ou pour commander le second régulateur de courant (17), par exemple par l'intermédiaire de la tension de la source de tension (10) et/ou de résistances (12, 13) dans la partie d'évaluation de données (2), et/ou par l'intermédiaire de résistances (14, 15) de la ligne de sortie (3) et/ou de la ligne de retour (4) et/ou de la capacité du condensateur (16) connecté en parallèle à l'entrée du régulateur de commutation (8).
  3. Circuit selon la revendication 1 ou 2, caractérisé en ce que la chute de tension est fournie au circuit transducteur de mesure par l'intermédiaire du régulateur de courant (9), par exemple par l'intermédiaire d'un convertisseur A/N, pour commander la consommation de courant du circuit transducteur de mesure et/ou pour commander le second régulateur de courant.
  4. Circuit selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le circuit transducteur de mesure (7) comprend un microcontrôleur (18) commandant le régulateur de courant (9) et, le cas échéant, le second régulateur de courant (17).
  5. Circuit selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le courant (I5) passant dans le circuit transducteur de mesure (7) n'est réduit pendant une courte durée que lorsque la donnée diminue "brutalement", par exemple en diminuant de 100% à 0%.
  6. Circuit selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le second régulateur de courant (17) n'est activé que lorsque la donnée augmente "brutalement", par exemple en augmentant de 0% à 100%.
  7. Circuit selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la commande de courant atteignant le circuit transducteur de mesure (7) en provenance du circuit transducteur de mesure (7) ou du microcontrôleur (18) ne passe du régulateur de courant (9) au second régulateur de courant (17) que lorsque la tension (U4) à la sortie du premier régulateur de courant (9) atteint la tension (U3) à l'entrée du premier régulateur de courant (9).
  8. Circuit selon l'une quelconque des revendications 4 à 7, caractérisé en ce que le courant (I3) passant à travers la partie d'acquisition de données (1) est commandé en première priorité et la tension (U4) à la sortie du régulateur de courant (9) est commandée en seconde priorité au moyen du microcontrôleur (18) prévu dans le circuit transducteur de mesure (7).
EP00943787A 1999-06-08 2000-06-08 Circuit pour la saisie, la transmission et l'exploitation de valeurs de mesures Expired - Lifetime EP1103038B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19925943 1999-06-08
DE19925943A DE19925943A1 (de) 1999-06-08 1999-06-08 Schaltungsanordnung zur Meßwerterfassung, -übertragung und -auswertung
PCT/EP2000/005324 WO2000075904A1 (fr) 1999-06-08 2000-06-08 Circuit pour la saisie, la transmission et l'exploitation de valeurs de mesures

Publications (2)

Publication Number Publication Date
EP1103038A1 EP1103038A1 (fr) 2001-05-30
EP1103038B1 true EP1103038B1 (fr) 2012-08-15

Family

ID=7910447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00943787A Expired - Lifetime EP1103038B1 (fr) 1999-06-08 2000-06-08 Circuit pour la saisie, la transmission et l'exploitation de valeurs de mesures

Country Status (9)

Country Link
US (1) US6577989B2 (fr)
EP (1) EP1103038B1 (fr)
JP (1) JP4541615B2 (fr)
CN (1) CN1171186C (fr)
BR (1) BR0006657A (fr)
CZ (1) CZ2001459A3 (fr)
DE (1) DE19925943A1 (fr)
DK (1) DK1103038T3 (fr)
WO (1) WO2000075904A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2656023B2 (fr) † 2010-12-22 2023-12-27 Rosemount Tank Radar AB Dispositif de terrain alimenté par boucle

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10059815A1 (de) * 2000-12-01 2002-06-13 Grieshaber Vega Kg Elektronische Messvorrichtung zur Erfassung einer Prozessvariablen, insbesondere Radar- oder Ultraschall-Füllstandsmessvorrichtung und Verfahren zum Betreiben einer solchen Messvorrichtung
US20020149379A1 (en) 2000-01-12 2002-10-17 Winfried Rauer Electronic measuring device for detecting a process variable, in particular a radar or ultrasonic filling level measuring device, and a method for operating a measuring device of this type
DE10256623A1 (de) * 2002-12-03 2004-06-24 Krohne Meßtechnik GmbH & Co KG Elektrisches Gerät und Verfahren zum Betreiben eines elektrischen Geräts
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
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
DE102008043199A1 (de) 2008-10-27 2010-04-29 Endress + Hauser Process Solutions Ag Autarkes Feldgerät
CN102859852B (zh) 2010-04-19 2015-11-25 恩德斯+豪斯流量技术股份有限公司 测量变换器的驱动电路及由该驱动电路形成的测量系统
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
DE102010063949A1 (de) 2010-12-22 2012-06-28 Endress + Hauser Gmbh + Co. Kg Messgerät
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
DE102013008598A1 (de) * 2013-05-22 2014-11-27 Krohne Messtechnik Gmbh Messanordnung
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
DE102015212080B4 (de) * 2015-06-29 2017-06-14 Continental Automotive Gmbh Verfahren zum Ermitteln der Abweichungen der gemessenen Stromist- von Stromsollwerten in einer Anzahl parallel geschalteter, stromgeregelter Schaltpfade
DE102016114860A1 (de) 2016-08-10 2018-02-15 Endress + Hauser Flowtec Ag Treiberschaltung sowie damit gebildete Umformer-Elektronik bzw. damit gebildetes Meßsystem
DE102018122014A1 (de) 2018-09-10 2020-03-12 Endress + Hauser Flowtec Ag Meßgeräte-System sowie damit gebildete Meßanordnung
CN112462841A (zh) * 2020-10-29 2021-03-09 国网山东省电力公司东营市东营区供电公司 一种实时监控变压器自动调档装置
DE102022119145A1 (de) 2022-07-29 2024-02-01 Endress+Hauser Flowtec Ag Anschlussschaltung für ein Feldgerät und Feldgerät

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5416723A (en) * 1993-03-03 1995-05-16 Milltronics Ltd. Loop powered process control transmitter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1311032C (fr) * 1989-03-31 1992-12-01 Stanley Chlebda Systeme de telemesure a deux fils comportant un dispositif emetteur a alimentation stabilisee
DE4343540C2 (de) * 1993-12-14 1995-12-07 Mannesmann Ag Anordnung zur potentialgetrennten Übertragung von Gleich- und Wechselstromsignalen
EP0844728B1 (fr) * 1996-11-25 2002-04-10 Samsung Electronics Co., Ltd. Convertisseur direct
DE19723645B4 (de) * 1997-06-05 2006-04-13 Endress + Hauser Gmbh + Co. Kg Anordnung zur Signalübertragung zwischen einer Geberstelle und einer Empfangsstelle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5416723A (en) * 1993-03-03 1995-05-16 Milltronics Ltd. Loop powered process control transmitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2656023B2 (fr) † 2010-12-22 2023-12-27 Rosemount Tank Radar AB Dispositif de terrain alimenté par boucle

Also Published As

Publication number Publication date
EP1103038A1 (fr) 2001-05-30
US20010016802A1 (en) 2001-08-23
CN1313978A (zh) 2001-09-19
DK1103038T3 (da) 2012-11-05
WO2000075904A1 (fr) 2000-12-14
JP4541615B2 (ja) 2010-09-08
BR0006657A (pt) 2001-05-02
US6577989B2 (en) 2003-06-10
DE19925943A1 (de) 2000-12-21
JP2003501761A (ja) 2003-01-14
CZ2001459A3 (cs) 2001-08-15
CN1171186C (zh) 2004-10-13

Similar Documents

Publication Publication Date Title
EP1103038B1 (fr) Circuit pour la saisie, la transmission et l'exploitation de valeurs de mesures
DE19723645B4 (de) Anordnung zur Signalübertragung zwischen einer Geberstelle und einer Empfangsstelle
DE69932635T2 (de) Hocheffiziente spannungsversorgung fuer eine zweidrahtschleifengespeisste vorrichtung
DE3611261C2 (fr)
EP0986039B1 (fr) Dispositif pour l'alimentation d'un émetteur d'une boucle de courant
WO2011085703A1 (fr) Dispositif et procédé de fourniture d'une tension d'alimentation à un nœud de bus sur un réseau en bus
EP0774185B1 (fr) Station raccordee a un bus
EP0725995B1 (fr) Installation d'alimentation a distance
EP1203933A1 (fr) Dispositif capteur pour la mesure d'au moins une grandeur
WO2001031663A1 (fr) Ensemble circuit electrique servant a convertir une tension d'entree
DE3228305A1 (de) Digitalregler
DE3242316C2 (fr)
DE102008048929A1 (de) Prüfung der Meldelinien einer Gefahrenmeldeanlage
EP3303935B1 (fr) Dispositif et procédé de commande d'une installation de chauffage et/ou de climatisation
DE2839123C2 (de) Spannungs-Frequenz-Wandler
DE19517492B4 (de) Analoge Stromschnittstelle
DE4015672C2 (fr)
DE4106915C2 (fr)
EP0689281B1 (fr) Alimentation à découpage avec consommation de courant sinusoidal
DE19619904C2 (de) Elektronisches, vorzugsweise berührungslos arbeitendes Schaltgerät
DE19729464C1 (de) Schaltungsanordnung für eine Ausgangsstufe
EP1457767A1 (fr) Mesure d'une pression avec un pont et une tension réduite pour le convertisseur A/D
DE2637295A1 (de) Elektrischer messumformer nach dem zwei-draht-verfahren
DE2856479B2 (de) Schaltungsanordnung zur Begrenzung des Regelbereichs eines Regelverstärkers
DE3503932A1 (de) Stromversorgungseinrichtung fuer ein, ueber eine teilnehmeranschlussleitung mit einer fernmeldevermittlungsanlage verbundenes endgeraet

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: 20010204

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20031126

17Q First examination report despatched

Effective date: 20031126

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 571170

Country of ref document: AT

Kind code of ref document: T

Effective date: 20120815

Ref country code: CH

Ref legal event code: EP

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 50016252

Country of ref document: DE

Effective date: 20121011

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: NL

Ref legal event code: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120815

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120815

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121116

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121217

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121126

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20130516

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20130619

Year of fee payment: 14

Ref country code: GB

Payment date: 20130619

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20130625

Year of fee payment: 14

Ref country code: NL

Payment date: 20130619

Year of fee payment: 14

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 50016252

Country of ref document: DE

Effective date: 20130516

BERE Be: lapsed

Owner name: KROHNE MESSTECHNIK G.M.B.H. & CO. KG

Effective date: 20130630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120815

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130608

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 571170

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130608

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20150101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140609

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130608

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20170621

Year of fee payment: 18

Ref country code: FR

Payment date: 20170621

Year of fee payment: 18

Ref country code: CH

Payment date: 20170620

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20170828

Year of fee payment: 18

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50016252

Country of ref document: DE

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

Effective date: 20180630

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180630

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190101

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180630

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180630