FR2447555A1 - Circuit de mesure de capacite, notamment pour une jauge capacitive de niveau de liquide - Google Patents

Circuit de mesure de capacite, notamment pour une jauge capacitive de niveau de liquide

Info

Publication number
FR2447555A1
FR2447555A1 FR7902026A FR7902026A FR2447555A1 FR 2447555 A1 FR2447555 A1 FR 2447555A1 FR 7902026 A FR7902026 A FR 7902026A FR 7902026 A FR7902026 A FR 7902026A FR 2447555 A1 FR2447555 A1 FR 2447555A1
Authority
FR
France
Prior art keywords
constant current
discharged
comparison
utilises
liq
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Withdrawn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
FR7902026A
Other languages
English (en)
Inventor
Mario Adrien Weiss
Original Assignee
Jaeger
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 Jaeger filed Critical Jaeger
Priority to FR7902026A priority Critical patent/FR2447555A1/fr
Publication of FR2447555A1 publication Critical patent/FR2447555A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2605—Measuring capacitance
    • 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
    • G01F23/266—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 measuring 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)
  • Measurement Of Current Or Voltage (AREA)

Abstract

L'INVENTION CONCERNE UN CIRCUIT DE MESURE D'UNE CAPACITE. IL COMPREND UN MOYEN POUR EFFECTUER PERIODIQUEMENT UN CYCLE DE CHARGE ET DE DECHARGE DE LA CAPACITE, LA CHARGE ETOU LA DECHARGE S'EFFECTUANT A COURANT CONSTANT ENTRE DEUX VALEURS DE TENSION DETERMINEE. ON ETABLIT DES CRENEAUX PERIODIQUES DE DIAMETRE FONCTION LINEAIRE DE LA DUREE DE CHARGE OU DECHARGE A COURANT CONSTANT DE LA VALEUR DE LA CAPACITE. UN FILTRAGE PERMET DE FOURNIR UNE TENSION CONTINUE REPRESENTATIVE DE LA CAPACITE. APPLICATION NOTAMMENT A LA MESURE DES NIVEAUX DE LIQUIDE PAR UNE JAUGE CAPACITIVE.
FR7902026A 1979-01-26 1979-01-26 Circuit de mesure de capacite, notamment pour une jauge capacitive de niveau de liquide Withdrawn FR2447555A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7902026A FR2447555A1 (fr) 1979-01-26 1979-01-26 Circuit de mesure de capacite, notamment pour une jauge capacitive de niveau de liquide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7902026A FR2447555A1 (fr) 1979-01-26 1979-01-26 Circuit de mesure de capacite, notamment pour une jauge capacitive de niveau de liquide

Publications (1)

Publication Number Publication Date
FR2447555A1 true FR2447555A1 (fr) 1980-08-22

Family

ID=9221244

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7902026A Withdrawn FR2447555A1 (fr) 1979-01-26 1979-01-26 Circuit de mesure de capacite, notamment pour une jauge capacitive de niveau de liquide

Country Status (1)

Country Link
FR (1) FR2447555A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0644432A2 (fr) * 1993-09-17 1995-03-22 Penberthy, Inc. Dispositif de mesure de capacité
US7845224B2 (en) 2004-12-22 2010-12-07 Inergy Automotive Systems Research (Societe Anonyme) Liquid level sensor and liquid level estimation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0644432A2 (fr) * 1993-09-17 1995-03-22 Penberthy, Inc. Dispositif de mesure de capacité
EP0644432A3 (fr) * 1993-09-17 1996-04-17 Penberthy Inc Dispositif de mesure de capacité.
US7845224B2 (en) 2004-12-22 2010-12-07 Inergy Automotive Systems Research (Societe Anonyme) Liquid level sensor and liquid level estimation method

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Legal Events

Date Code Title Description
ST Notification of lapse