FR2386047A2 - Dispositif de mesure automatique de coefficient de qualite de barreaux magnetostrictifs - Google Patents

Dispositif de mesure automatique de coefficient de qualite de barreaux magnetostrictifs

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Publication number
FR2386047A2
FR2386047A2 FR7709405A FR7709405A FR2386047A2 FR 2386047 A2 FR2386047 A2 FR 2386047A2 FR 7709405 A FR7709405 A FR 7709405A FR 7709405 A FR7709405 A FR 7709405A FR 2386047 A2 FR2386047 A2 FR 2386047A2
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France
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FR7709405A
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English (en)
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FR2386047B2 (fr
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Individual
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Individual
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Priority to FR7709405A priority Critical patent/FR2386047A2/fr
Publication of FR2386047A2 publication Critical patent/FR2386047A2/fr
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Publication of FR2386047B2 publication Critical patent/FR2386047B2/fr
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H13/00—Measuring resonant frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
    • G01R33/18—Measuring magnetostrictive properties

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

a. Dispositif de mesure automatique directe du coefficient de qualité d'un barreau magnétostrictif vibrant en oscillation libre. b. Il comprend des moyens de mise en vibration périodique, par demi-périodes alternées, dudit barreau, et des moyens de mesurer les amplitudes de l'oscillation à deux instants de chaque demi-période d'oscillation libre espacés d'une durée constante. Ces amplitudes sont transformées en tensions électriques proportionnelles et l'on prévoit un dispositif numérique permettant l'affichage direct de la valeur du rapport desdites amplitudes, valeur qui représente le coefficient cherché. c. Application à la mesure des propriétés physiques des vibrateurs magnétostrictifs.
FR7709405A 1977-03-29 1977-03-29 Dispositif de mesure automatique de coefficient de qualite de barreaux magnetostrictifs Granted FR2386047A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7709405A FR2386047A2 (fr) 1977-03-29 1977-03-29 Dispositif de mesure automatique de coefficient de qualite de barreaux magnetostrictifs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7709405A FR2386047A2 (fr) 1977-03-29 1977-03-29 Dispositif de mesure automatique de coefficient de qualite de barreaux magnetostrictifs

Publications (2)

Publication Number Publication Date
FR2386047A2 true FR2386047A2 (fr) 1978-10-27
FR2386047B2 FR2386047B2 (fr) 1981-04-30

Family

ID=9188727

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7709405A Granted FR2386047A2 (fr) 1977-03-29 1977-03-29 Dispositif de mesure automatique de coefficient de qualite de barreaux magnetostrictifs

Country Status (1)

Country Link
FR (1) FR2386047A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011724A1 (fr) * 1978-11-30 1980-06-11 International Business Machines Corporation Procédé de détermination directe de constantes magnétostrictives et dispositif pour sa mise en oeuvre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011724A1 (fr) * 1978-11-30 1980-06-11 International Business Machines Corporation Procédé de détermination directe de constantes magnétostrictives et dispositif pour sa mise en oeuvre

Also Published As

Publication number Publication date
FR2386047B2 (fr) 1981-04-30

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