DE19523234A1 - Differential pressure sensor for pipeline system - Google Patents

Differential pressure sensor for pipeline system

Info

Publication number
DE19523234A1
DE19523234A1 DE1995123234 DE19523234A DE19523234A1 DE 19523234 A1 DE19523234 A1 DE 19523234A1 DE 1995123234 DE1995123234 DE 1995123234 DE 19523234 A DE19523234 A DE 19523234A DE 19523234 A1 DE19523234 A1 DE 19523234A1
Authority
DE
Germany
Prior art keywords
pressure
pressure sensor
membrane
liquid
windings
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Withdrawn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
DE1995123234
Other languages
German (de)
Inventor
Wolfgang Dipl Ing Sachs
Reiner Stockfisch
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE1995123234 priority Critical patent/DE19523234A1/en
Publication of DE19523234A1 publication Critical patent/DE19523234A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/22—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/2291—Linear or rotary variable differential transformers (LVDTs/RVDTs) having a single primary coil and two secondary coils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
    • G01F23/18—Indicating, recording or alarm devices actuated electrically
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/007—Transmitting or indicating the displacement of flexible diaphragms using variations in inductance

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The pressure sensor detects a pressure by using a membrane (13), remote pick-up and signal path receptor (14), based on the differential transformer principle. The evaluation unit (15) feeds the pressure indicator (16). The frame (11) provides a stable support for the windings. There is a threaded flange (12). The membrane is coupled to the windings by a push rod. The arrangement can be placed directly in or at a piping system, and can replace existing conventional systems. The pressure of a liquid, solid or gaseous medium is measured. A fill level indictor is realised and the coupling for liquid and gaseous media is mechanical.

Description

Gängige Drucksensoren, welche durch Halbleiter realisiert sind, haben häufig das Problem der Medientrennung. Weiterhin sind zur Linearisierung solcher Elemente umfangreiche Abgleichmaßnahmen erforderlich. Für Wasserdrucksensoren ist auch die mechanische Ankopplung recht schwierig und somit für das Gesamtsystem recht teuer.Common pressure sensors, which are realized by semiconductors, often have the problem of Media separation. Furthermore, linearization of such elements is extensive Matching measures required. The mechanical one is also for water pressure sensors Coupling quite difficult and therefore quite expensive for the overall system.

Im Rahmen dieser Erfindung wird ein Drucksensor vorgeschlagen, der mittels einer mechanischen Ankopplung an eine Membran indirekt den Weg dieser Membran mißt und in einen analogen Wert umsetzt, der linear dem bestehenden Druck entspricht. Dieses System kann in allen Medien eingesetzt werden wie z. B. Wasser, Öl, Gas oder andere flüssige Medien.As part of this According to the invention, a pressure sensor is proposed, which is connected by means of a mechanical coupling a membrane indirectly measures the path of this membrane and converts it into an analog value that linearly corresponds to the existing pressure. This system can be used in all media be like B. water, oil, gas or other liquid media.

Beschreibungdescription

Der Wegaufnehmer (Skizze 1) ist ein üblicher Differentialtransformator (1), welcher durch die Spulen (5), (6) gespeist wird. Die elektrische Prinzipanordnung ist durch einen Oszillator (7) und durch die Spulen (8), (9), (10) gekennzeichnet. Durch die Lage der Stellung des Kerns (4) wird die Größe der Induktion in den Sekundärspulen (9), (10) bestimmt. Sitzt der Kern außermittig (3) wird jeweils in die linke oder rechte Sekundärspule mehr oder weniger Spannung induziert. Hierdurch ist es möglich, ein lineares Ausgangssignal in Abhängigkeit des beschriebenen Weges des Kerns (4) zu gewinnen. Die Linearität und Wiederholgenauigkeit lassen es zu, mit dieser Methode bis zu 1/1000 mm zu messen und ist somit geeignet, um auch Sensorsignale und andere genaue Meßgrößen zu liefern. Dieses Prinzip ist hinreichend bekannt und wird in der Meßtechnik zu Erfassung kleinster mechanischer Größen verwendet.The displacement transducer (sketch 1 ) is a conventional differential transformer ( 1 ) which is fed by the coils ( 5 ), ( 6 ). The electrical principle arrangement is characterized by an oscillator ( 7 ) and by the coils ( 8 ), ( 9 ), ( 10 ). The position of the core ( 4 ) determines the size of the induction in the secondary coils ( 9 ), ( 10 ). If the core is off-center ( 3 ), more or less voltage is induced in the left or right secondary coil. This makes it possible to obtain a linear output signal depending on the path of the core ( 4 ) described. The linearity and repeatability allow measurements of up to 1/1000 mm with this method and is therefore suitable for delivering sensor signals and other precise measured variables. This principle is well known and is used in measurement technology to record the smallest mechanical quantities.

Das Neue an dieser Erfindung ist die Ankopplung dieser Anordnung an eine Membran (Skizze 2), die je nach Druckbereich von Null bis hunderte von Bar eine mechanische Bewegungsgröße im Bereich von 0,5 bis 1 mm liefert. Dies bedeutet, daß man so in der Lage ist, den zu messenden Druckbereich bis auf ein Promille aufzulösen. Die Grundeigenschaften dieses Drucksensors liegen also auf der mechanischen Seite, der Membran selbst. Die Ankopplung geschieht dadurch, daß der Stößel (2) auf die Membran (13) aufgebracht wird. Der Rahmen (11) sorgt für eine stabile Aufhängung des Spulenkörpers (1). Die Signalleitungen (14) werden der Auswertelektronik (15) zugeführt, wo sie so aufbereitet werden, daß das Ausgangssignal mit dem richtigen Druckwert zur Anzeige (16) gebracht wird. Mit dem Gewindeflansch (12) kann dieser Sensor direkt in entsprechende Leitungen mit dem passenden Gewinde geschraubt werden.The novelty of this invention is the coupling of this arrangement to a membrane (sketch 2 ) which, depending on the pressure range from zero to hundreds of bar, provides a mechanical movement variable in the range from 0.5 to 1 mm. This means that you are able to resolve the pressure range to be measured down to one per thousand. The basic properties of this pressure sensor are therefore on the mechanical side, the membrane itself. The coupling takes place in that the plunger ( 2 ) is applied to the membrane ( 13 ). The frame ( 11 ) ensures a stable suspension of the bobbin ( 1 ). The signal lines ( 14 ) are fed to the evaluation electronics ( 15 ), where they are processed in such a way that the output signal with the correct pressure value is displayed ( 16 ). With the threaded flange ( 12 ), this sensor can be screwed directly into corresponding lines with the appropriate thread.

Durch die Entkopplung durch die Membran ist es möglich, flüssige, feste und gasförmige Medien zu erfassen.By decoupling through the membrane, it is possible to use liquid, solid and gaseous Capture media.

Ändert man die Anordnung in Skizze 2 dadurch, daß die mechanische Anbindung mit dem Stößel (2) an eine Tankanlage erfolgt, kann ebenso eine Füllstandsanzeige realisiert werden.If you change the arrangement in sketch 2 by making the mechanical connection with the tappet ( 2 ) to a tank system, a level indicator can also be implemented.

Claims (5)

1. Drucksensor, dadurch gekennzeichnet, daß zur Erfassung des Druckes über eine Membran ein Wegaufnehmer nach dem Prinzip eines Differentialtransformators verwendet wird.1. Pressure sensor, characterized in that a position transducer is used on the principle of a differential transformer to detect the pressure across a membrane. 2. Drucksensor nach Anspruch 1, dadurch gekennzeichnet, daß die Anordnung direkt in oder an entsprechende Rohrleitungssysteme angebracht werden kann.2. Pressure sensor according to claim 1, characterized in that the arrangement directly in or on appropriate piping systems can be attached. 3. Drucksensor nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Anordnung direkt bestehende konventionelle Systeme (Manometer) ersetzen kann.3. Pressure sensor according to claim 1 and 2, characterized in that the arrangement is direct can replace existing conventional systems (manometers). 4. Drucksensor nach Anspruch 1, 2 und 3, dadurch gekennzeichnet, daß flüssige, feste und gasförmige Medien im Druck erfaßt werden können.4. Pressure sensor according to claim 1, 2 and 3, characterized in that liquid, solid and gaseous media can be detected in pressure. 5. Drucksensor nach Anspruch 1, 2 und 3, dadurch gekennzeichnet, daß durch mechanische Ankopplung eine Füllstandsanzeige für flüssige und gasförmige Medien realisiert wird.5. Pressure sensor according to claim 1, 2 and 3, characterized in that by mechanical Coupling a level indicator for liquid and gaseous media is realized.
DE1995123234 1995-06-27 1995-06-27 Differential pressure sensor for pipeline system Withdrawn DE19523234A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1995123234 DE19523234A1 (en) 1995-06-27 1995-06-27 Differential pressure sensor for pipeline system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1995123234 DE19523234A1 (en) 1995-06-27 1995-06-27 Differential pressure sensor for pipeline system

Publications (1)

Publication Number Publication Date
DE19523234A1 true DE19523234A1 (en) 1997-01-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE1995123234 Withdrawn DE19523234A1 (en) 1995-06-27 1995-06-27 Differential pressure sensor for pipeline system

Country Status (1)

Country Link
DE (1) DE19523234A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10347861A1 (en) * 2003-10-10 2005-04-28 Endress & Hauser Gmbh & Co Kg Measurement transducer e.g. for pressure sensor, has housing and sensor element arranged in transducer with housing having locking flange creating integrated positive pressure.
US7363811B2 (en) 2005-04-07 2008-04-29 Endress + Hauser Flowtec Ag Measurement pickup
DE102008025752A1 (en) * 2008-05-29 2009-12-10 Zf Electronics Gmbh Pressure sensor, particularly inductive pressure sensor, has inductive element, and pressure container, whose one side is partially formed by elastically deformed membrane

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT186431B (en) * 1952-10-04 1956-08-10 Daimler Benz Ag Device for inductive or capacitive measurement of pressures or pressure oscillations, especially in liquid lines, e.g. B. Injection lines of internal combustion engines
US4165653A (en) * 1978-07-27 1979-08-28 Mcgraw-Edison Company Signal ratio indicator
GB2049942A (en) * 1979-06-07 1980-12-31 Matsushita Electric Works Ltd Pressure transducer
DE3215238A1 (en) * 1981-05-11 1983-01-20 Deutsche Itt Industries Gmbh, 7800 Freiburg LIQUID LEVEL MEASURING SYSTEM

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT186431B (en) * 1952-10-04 1956-08-10 Daimler Benz Ag Device for inductive or capacitive measurement of pressures or pressure oscillations, especially in liquid lines, e.g. B. Injection lines of internal combustion engines
US4165653A (en) * 1978-07-27 1979-08-28 Mcgraw-Edison Company Signal ratio indicator
GB2049942A (en) * 1979-06-07 1980-12-31 Matsushita Electric Works Ltd Pressure transducer
DE3215238A1 (en) * 1981-05-11 1983-01-20 Deutsche Itt Industries Gmbh, 7800 Freiburg LIQUID LEVEL MEASURING SYSTEM

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RICHTER, H.: Signalverarbeitungskonzepte für Differenzialkondensatoren, tm-Technisches Messen 59 (1992) 12, S. 479-484 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10347861A1 (en) * 2003-10-10 2005-04-28 Endress & Hauser Gmbh & Co Kg Measurement transducer e.g. for pressure sensor, has housing and sensor element arranged in transducer with housing having locking flange creating integrated positive pressure.
US7363811B2 (en) 2005-04-07 2008-04-29 Endress + Hauser Flowtec Ag Measurement pickup
DE102008025752A1 (en) * 2008-05-29 2009-12-10 Zf Electronics Gmbh Pressure sensor, particularly inductive pressure sensor, has inductive element, and pressure container, whose one side is partially formed by elastically deformed membrane

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