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GB1147080A - Improvements in or relating to pressure transducers - Google Patents

Improvements in or relating to pressure transducers

Info

Publication number
GB1147080A
GB1147080A GB964467A GB964467A GB1147080A GB 1147080 A GB1147080 A GB 1147080A GB 964467 A GB964467 A GB 964467A GB 964467 A GB964467 A GB 964467A GB 1147080 A GB1147080 A GB 1147080A
Authority
GB
United Kingdom
Prior art keywords
pressure
differential
measured
diaphragm
coated
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
GB964467A
Inventor
Donald Woods
Kenneth Alfred Fletcher
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.)
WAYNE KERR CO Ltd
Original Assignee
WAYNE KERR 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 WAYNE KERR CO Ltd filed Critical WAYNE KERR CO Ltd
Priority to GB964467A priority Critical patent/GB1147080A/en
Publication of GB1147080A publication Critical patent/GB1147080A/en
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
    • G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
    • G01L11/004—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces
    • 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
    • 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

Landscapes

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

Abstract

1,147,080. Measuring pressure electrically. WAYNE KERR CO. and D. WOODS. March 18, 1968 [March 1, 1967], No.9644/67. Heading G1N. Differential fluid-pressure is measured by a differential capacitor comprising a thin diaphragm 14 Fig. 1 of polyester resin coated with aluminium and covered by a thin film of insulation, and two fixed annular electrodes 20, 21 surrounded by guard rings 22, 23, the spacing being such that after a small increase in differential pressure the diaphragm 14 contacts the face of electrode 20 or 21, whereby mechanical damage due to higher pressures are avoided. With further pressure increase the differential capacitance continues to change as the diaphragm makes contact with the fixed electrode over an increasing area, but in a non-linear manner. The capacitance is measured in a feedback circuit Figs. 2, 3 (not shown). The transducer may be associated with an r.f. bolometer for measuring r.f. flux, comprising two insulating spheres, one coated with a resistive film and the other uncoated. In the presence of r.f. flux the temperature of the coated sphere rises producing a pressure difference which is measured by the above transducer.
GB964467A 1967-03-01 1967-03-01 Improvements in or relating to pressure transducers Expired GB1147080A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB964467A GB1147080A (en) 1967-03-01 1967-03-01 Improvements in or relating to pressure transducers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB964467A GB1147080A (en) 1967-03-01 1967-03-01 Improvements in or relating to pressure transducers

Publications (1)

Publication Number Publication Date
GB1147080A true GB1147080A (en) 1969-04-02

Family

ID=9875984

Family Applications (1)

Application Number Title Priority Date Filing Date
GB964467A Expired GB1147080A (en) 1967-03-01 1967-03-01 Improvements in or relating to pressure transducers

Country Status (1)

Country Link
GB (1) GB1147080A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2447545A1 (en) * 1979-01-24 1980-08-22 Honeywell Inc CAPACITIVE DIFFERENTIAL PRESSURE TRANSDUCER
FR2607927A1 (en) * 1986-12-03 1988-06-10 Mouchet Jacques Improvements to differential capacitive sensors for gas leak detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2447545A1 (en) * 1979-01-24 1980-08-22 Honeywell Inc CAPACITIVE DIFFERENTIAL PRESSURE TRANSDUCER
FR2607927A1 (en) * 1986-12-03 1988-06-10 Mouchet Jacques Improvements to differential capacitive sensors for gas leak detector

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