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GB1382706A - Air gauge - Google Patents

Air gauge

Info

Publication number
GB1382706A
GB1382706A GB2465172A GB2465172A GB1382706A GB 1382706 A GB1382706 A GB 1382706A GB 2465172 A GB2465172 A GB 2465172A GB 2465172 A GB2465172 A GB 2465172A GB 1382706 A GB1382706 A GB 1382706A
Authority
GB
United Kingdom
Prior art keywords
nozzle
diaphragm
inductor
air
pressure
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
GB2465172A
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.)
TI Group Services Ltd
Original Assignee
TI Group Services 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 TI Group Services Ltd filed Critical TI Group Services Ltd
Priority to GB2465172A priority Critical patent/GB1382706A/en
Publication of GB1382706A publication Critical patent/GB1382706A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B13/00—Measuring arrangements characterised by the use of fluids
    • 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
    • G01L11/006—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 hydraulic or pneumatic counterbalancing forces
    • 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
    • G01L9/007—Transmitting or indicating the displacement of flexible diaphragms using variations in inductance

Landscapes

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

Abstract

1382706 Measuring differential air pressures T I (GROUP SERVICES) Ltd 8 Aug 1973 [25 May 1972] 24651/72 Heading G1N To measure the distance between a nozzle 11, Fig.1, and an object 18 air is passed through the nozzle and the pressure in the supply pipe is measured. The air is supplied to both sides of a diaphragm 1 via pipes 8 and 15 and control orifices 12, 13, one side of the diaphragm venting to the atmosphere through a nozzle 16 identical to nozzle 11. The diaphragm moves until the pressure drop across the two nozzles is the same and the diaphragm position, which is sensed by inductor 20, is a measure of this pressure drop. The inductor is wound on a pot core 18 and co-operates with a ferromagnetic plate 2 on the diaphragm. A constant A.C. voltage is supplied to the inductor by generator 21, and is rectified at 22 for display at 24. The magnitude of the rectified signal varies with the inductance, i.e. with the pressure or the separation of nozzle 11 and body 18. In Fig.2 another construction of the differential pressure sensor is shown, a metal diaphragm 25 being used. The main air supply is through manifold 30 which. is connected to the upper side of the diaphragm by passages 32, 36, 37 and to the lower side by orifice 33. The upper side vents through nozzle 28 and the lower side is connected to the measuring nozzle (not shown) by outlet 34.
GB2465172A 1972-05-25 1972-05-25 Air gauge Expired GB1382706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2465172A GB1382706A (en) 1972-05-25 1972-05-25 Air gauge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2465172A GB1382706A (en) 1972-05-25 1972-05-25 Air gauge

Publications (1)

Publication Number Publication Date
GB1382706A true GB1382706A (en) 1975-02-05

Family

ID=10215091

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2465172A Expired GB1382706A (en) 1972-05-25 1972-05-25 Air gauge

Country Status (1)

Country Link
GB (1) GB1382706A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2469698A1 (en) * 1979-11-15 1981-05-22 Bosch Gmbh Robert MEASURING DEVICE FOR THE NON-CONTACT DETERMINATION OF THE DISTANCE BETWEEN A METAL SURFACE AND A COUNTER SURFACE
FR2498324A1 (en) * 1981-01-19 1982-07-23 Danfoss As MANOMETRIC DEVICE
US4364270A (en) * 1979-11-09 1982-12-21 Siemens Aktiengesellschaft Device for pneumatically scanning the level of liquid in a container
GB2150695A (en) * 1983-11-30 1985-07-03 Daimler Benz Ag Device for the indirect contactless electrical measuring of short paths
US4536719A (en) * 1980-09-18 1985-08-20 Robert Bosch Gmbh Inductive pressure sensor using two oscillators
DE3500731A1 (en) * 1985-01-11 1986-07-17 Honeywell Gmbh, 6050 Offenbach Electro-pneumatic signal converter or pneumatic actuator
US4986111A (en) * 1988-08-17 1991-01-22 The British Petroleum Company P.L.C. Non-contacting gauge for surfaces
US5789661A (en) * 1997-02-14 1998-08-04 Sigmatech, Inc. Extended range and ultra-precision non-contact dimensional gauge
US9719876B2 (en) 2014-08-26 2017-08-01 Commissariat A L'energie Atomique Et Aux Energies Alternatives Fluid pressure sensor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364270A (en) * 1979-11-09 1982-12-21 Siemens Aktiengesellschaft Device for pneumatically scanning the level of liquid in a container
FR2469698A1 (en) * 1979-11-15 1981-05-22 Bosch Gmbh Robert MEASURING DEVICE FOR THE NON-CONTACT DETERMINATION OF THE DISTANCE BETWEEN A METAL SURFACE AND A COUNTER SURFACE
US4536719A (en) * 1980-09-18 1985-08-20 Robert Bosch Gmbh Inductive pressure sensor using two oscillators
FR2498324A1 (en) * 1981-01-19 1982-07-23 Danfoss As MANOMETRIC DEVICE
GB2150695A (en) * 1983-11-30 1985-07-03 Daimler Benz Ag Device for the indirect contactless electrical measuring of short paths
US4638659A (en) * 1983-11-30 1987-01-27 Daimler-Benz Aktiengesellschaft Device for the indirect contactless electrical measuring of short paths
DE3500731A1 (en) * 1985-01-11 1986-07-17 Honeywell Gmbh, 6050 Offenbach Electro-pneumatic signal converter or pneumatic actuator
US4986111A (en) * 1988-08-17 1991-01-22 The British Petroleum Company P.L.C. Non-contacting gauge for surfaces
US5789661A (en) * 1997-02-14 1998-08-04 Sigmatech, Inc. Extended range and ultra-precision non-contact dimensional gauge
US9719876B2 (en) 2014-08-26 2017-08-01 Commissariat A L'energie Atomique Et Aux Energies Alternatives Fluid pressure sensor

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees