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FR2383430A1 - Capteur capacitif, en particulier pour scrutation et enregistrement automatique de pressions - Google Patents

Capteur capacitif, en particulier pour scrutation et enregistrement automatique de pressions

Info

Publication number
FR2383430A1
FR2383430A1 FR7707133A FR7707133A FR2383430A1 FR 2383430 A1 FR2383430 A1 FR 2383430A1 FR 7707133 A FR7707133 A FR 7707133A FR 7707133 A FR7707133 A FR 7707133A FR 2383430 A1 FR2383430 A1 FR 2383430A1
Authority
FR
France
Prior art keywords
liq
mercury
tube
variable capacitor
absolute
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
FR7707133A
Other languages
English (en)
Other versions
FR2383430B1 (fr
Inventor
Georges Vachaud
Jean-Louis Thony
Jack Baudoin
Robert Bolcato
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.)
Bpifrance Financement SA
Original Assignee
Agence National de Valorisation de la Recherche ANVAR
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 Agence National de Valorisation de la Recherche ANVAR filed Critical Agence National de Valorisation de la Recherche ANVAR
Priority to FR7707133A priority Critical patent/FR2383430A1/fr
Publication of FR2383430A1 publication Critical patent/FR2383430A1/fr
Application granted granted Critical
Publication of FR2383430B1 publication Critical patent/FR2383430B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • G01L9/0091—Transmitting or indicating the displacement of liquid mediums by electrical, electromechanical, magnetic or electromagnetic means
    • G01L9/0095—Transmitting or indicating the displacement of liquid mediums by electrical, electromechanical, magnetic or electromagnetic means using variations in capacitance
    • 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
    • G01D5/24—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 capacitance
    • G01D5/241—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 capacitance by relative movement of capacitor electrodes
    • G01D5/2412—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 capacitance by relative movement of capacitor electrodes by varying overlap
    • 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
    • G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/248—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 characteristics of pulses or pulse trains; generating pulses or pulse trains by varying pulse repetition frequency
    • 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
    • G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00—Measuring temperature based on the expansion or contraction of a material
    • G01K5/02—Measuring temperature based on the expansion or contraction of a material the material being a liquid
    • G01K5/18—Measuring temperature based on the expansion or contraction of a material the material being a liquid with electric conversion means for final indication
    • 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
    • G01L9/12—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 by making use of variations in capacitance, i.e. electric circuits therefor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

Capteur capacitif sensible à la longueur d'une colonne de liquide, caractérisé par le fait qu'il utilise un liquide conducteur 1 constituant la colonne de liquide dans un tube diélectrique 2 qui comporte, sur une partie au moins de sa surface extérieure, un revêtement conducteur 3 sans contact avec le liquide, deux électrodes 7, 15 étant réunies respectivement au revêtement conducteur et au liquide conducteur pour constituer les bornes de la capacité variable ainsi formée. La capacité variable est ensuite transformée en fréquence par l'intermédiaire d'un convertisseur linéaire auto-oscillant de type dérivateur ou intégrateur, qui peut être associé à un dispositif d'enregistrement avec multiplexage éventuel et transformation du signal en un train d'impulsion de durée constante enregistré sur cassette magnétique.
FR7707133A 1977-03-10 1977-03-10 Capteur capacitif, en particulier pour scrutation et enregistrement automatique de pressions Granted FR2383430A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7707133A FR2383430A1 (fr) 1977-03-10 1977-03-10 Capteur capacitif, en particulier pour scrutation et enregistrement automatique de pressions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7707133A FR2383430A1 (fr) 1977-03-10 1977-03-10 Capteur capacitif, en particulier pour scrutation et enregistrement automatique de pressions

Publications (2)

Publication Number Publication Date
FR2383430A1 true FR2383430A1 (fr) 1978-10-06
FR2383430B1 FR2383430B1 (fr) 1981-11-27

Family

ID=9187895

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7707133A Granted FR2383430A1 (fr) 1977-03-10 1977-03-10 Capteur capacitif, en particulier pour scrutation et enregistrement automatique de pressions

Country Status (1)

Country Link
FR (1) FR2383430A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486232A1 (fr) * 1980-07-01 1982-01-08 Hokushin Electric Works Dispositif de conversion de deplacement de type capacitif
FR2619914A1 (fr) * 1987-08-24 1989-03-03 Mbeleck Jean Paul Condensateur electrique a capacite variable en fonction de la temperature, de la pression et de l'inclinaison

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486232A1 (fr) * 1980-07-01 1982-01-08 Hokushin Electric Works Dispositif de conversion de deplacement de type capacitif
FR2619914A1 (fr) * 1987-08-24 1989-03-03 Mbeleck Jean Paul Condensateur electrique a capacite variable en fonction de la temperature, de la pression et de l'inclinaison

Also Published As

Publication number Publication date
FR2383430B1 (fr) 1981-11-27

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Legal Events

Date Code Title Description
ST Notification of lapse