FR989771A - Perfectionnements aux procédés et aux appareils de mesures physiques utilisant la variation de fréquence propre de circuits oscillants - Google Patents

Perfectionnements aux procédés et aux appareils de mesures physiques utilisant la variation de fréquence propre de circuits oscillants

Info

Publication number
FR989771A
FR989771A FR989771DA FR989771A FR 989771 A FR989771 A FR 989771A FR 989771D A FR989771D A FR 989771DA FR 989771 A FR989771 A FR 989771A
Authority
FR
France
Prior art keywords
variation
methods
natural frequency
oscillating circuits
physical measurements
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
Application number
Other languages
English (en)
Inventor
Bideau
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.)
Societe Francaise dEquipements pour la Navigation Aerienne SFENA SA
Original Assignee
Societe Francaise dEquipements pour la Navigation Aerienne SFENA SA
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 Societe Francaise dEquipements pour la Navigation Aerienne SFENA SA filed Critical Societe Francaise dEquipements pour la Navigation Aerienne SFENA SA
Application granted granted Critical
Publication of FR989771A publication Critical patent/FR989771A/fr
Expired 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
    • G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
    • G01L9/0004—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using variations in inductance
    • 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
    • G01L9/0072—Transmitting or indicating the displacement of flexible diaphragms using variations in capacitance
    • G01L9/0075—Transmitting or indicating the displacement of flexible diaphragms using variations in capacitance using a ceramic diaphragm, e.g. alumina, fused quartz, glass
    • 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
    • G01L9/0082—Transmitting or indicating the displacement of capsules by electric, electromechanical, magnetic, or electromechanical means
    • G01L9/0086—Transmitting or indicating the displacement of capsules by electric, electromechanical, magnetic, or electromechanical means using variations in capacitance
    • 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
    • G01L9/10—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 inductance, i.e. electric circuits therefor
    • G01L9/105—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 inductance, i.e. electric circuits therefor with temperature compensating means
    • 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
    • G01L9/125—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 with temperature compensating means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
FR989771D 1949-04-28 1949-04-28 Perfectionnements aux procédés et aux appareils de mesures physiques utilisant la variation de fréquence propre de circuits oscillants Expired FR989771A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR989771T 1949-04-28

Publications (1)

Publication Number Publication Date
FR989771A true FR989771A (fr) 1951-09-13

Family

ID=9540470

Family Applications (1)

Application Number Title Priority Date Filing Date
FR989771D Expired FR989771A (fr) 1949-04-28 1949-04-28 Perfectionnements aux procédés et aux appareils de mesures physiques utilisant la variation de fréquence propre de circuits oscillants

Country Status (1)

Country Link
FR (1) FR989771A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002110A1 (fr) * 1977-11-11 1979-05-30 Motorola, Inc. Fabrication de transducteurs capacitifs comprenant le dépôt d'un anneau isolant de verre ayant une épaisseur uniforme
FR2442439A1 (fr) * 1978-11-24 1980-06-20 Vaisala Oy Manometre aneroide
EP0018283A1 (fr) * 1979-04-16 1980-10-29 The Bendix Corporation Capteur de pression
EP0018284A1 (fr) * 1979-04-16 1980-10-29 The Bendix Corporation Procédé de fermeture sous vide d'une capsule de pression capacitive
WO1982001067A1 (fr) * 1980-09-18 1982-04-01 Baum H Jauge a pression inductive

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002110A1 (fr) * 1977-11-11 1979-05-30 Motorola, Inc. Fabrication de transducteurs capacitifs comprenant le dépôt d'un anneau isolant de verre ayant une épaisseur uniforme
FR2442439A1 (fr) * 1978-11-24 1980-06-20 Vaisala Oy Manometre aneroide
EP0018283A1 (fr) * 1979-04-16 1980-10-29 The Bendix Corporation Capteur de pression
EP0018284A1 (fr) * 1979-04-16 1980-10-29 The Bendix Corporation Procédé de fermeture sous vide d'une capsule de pression capacitive
WO1982001067A1 (fr) * 1980-09-18 1982-04-01 Baum H Jauge a pression inductive
US4536719A (en) * 1980-09-18 1985-08-20 Robert Bosch Gmbh Inductive pressure sensor using two oscillators

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