JPS5537968A - Pressure measuring instrument - Google Patents

Pressure measuring instrument

Info

Publication number
JPS5537968A
JPS5537968A JP11146678A JP11146678A JPS5537968A JP S5537968 A JPS5537968 A JP S5537968A JP 11146678 A JP11146678 A JP 11146678A JP 11146678 A JP11146678 A JP 11146678A JP S5537968 A JPS5537968 A JP S5537968A
Authority
JP
Japan
Prior art keywords
diaphragm
wave
measured
pressure
pressure measuring
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.)
Pending
Application number
JP11146678A
Other languages
Japanese (ja)
Inventor
Mitsuru Tamai
Takeshi Yasuhara
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP11146678A priority Critical patent/JPS5537968A/en
Priority to DE19792936452 priority patent/DE2936452A1/en
Publication of JPS5537968A publication Critical patent/JPS5537968A/en
Pending 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
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/0072—Transmitting or indicating the displacement of flexible diaphragms using variations in capacitance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
    • G01L13/02—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
    • G01L13/025—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using diaphragms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

PURPOSE: To obtain a highly-precise measured value under no influence of variation in ambient temperature by providing a measuring diaphragm and wave-shaped diaphragm is an external cylinder with a bottom, and then by filling it with an insulating solution.
CONSTITUTION: External cylinder 23 with bottom 22, equipped with diaphragm pedestal 26, pressure measuring diaphragm 27, insulator 32, reference electrode plate 37, plate spring 38, cradle plate 42, and wave-shaped diaphragm 43 is filled with an insulating solution and hermetically sealed. Insulator is provided with electrodes 29A and 29B of metal foil and electrodes, diaphragm 27 and reference electrode plate 37 are held at fixed intervals. Pressure to be measured, when applied to wave-shaped diaphragm 43, operates on pressure measuring diaphragm 27 through a through hole and insulating oil to change a capacitor value between it and electrode 29A, so that the pressure can be measured. Through the operation of wave shaped diaphragm 43, a measured-value error is never caused by variation in temperature.
COPYRIGHT: (C)1980,JPO&Japio
JP11146678A 1978-09-11 1978-09-11 Pressure measuring instrument Pending JPS5537968A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP11146678A JPS5537968A (en) 1978-09-11 1978-09-11 Pressure measuring instrument
DE19792936452 DE2936452A1 (en) 1978-09-11 1979-09-10 Pressure transducer for process control - has measuring diaphragm in recess on external cylinder, which has isolating disc fitted inside with metallic foil electrodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11146678A JPS5537968A (en) 1978-09-11 1978-09-11 Pressure measuring instrument

Publications (1)

Publication Number Publication Date
JPS5537968A true JPS5537968A (en) 1980-03-17

Family

ID=14561949

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11146678A Pending JPS5537968A (en) 1978-09-11 1978-09-11 Pressure measuring instrument

Country Status (2)

Country Link
JP (1) JPS5537968A (en)
DE (1) DE2936452A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5921497B2 (en) * 1978-11-02 1984-05-21 富士電機株式会社 pressure measuring device
US4572000A (en) * 1983-12-09 1986-02-25 Rosemount Inc. Pressure sensor with a substantially flat overpressure stop for the measuring diaphragm
DE3942047A1 (en) * 1989-12-20 1991-07-04 Vega Grieshaber Gmbh & Co PRESSURE GAUGE FOR HYDROSTATIC LEVEL MEASUREMENT

Also Published As

Publication number Publication date
DE2936452A1 (en) 1980-03-27

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