FR2396283A1 - DEVICE FOR MEASURING THE DENSITY OF GASEOUS MEDIA - Google Patents

DEVICE FOR MEASURING THE DENSITY OF GASEOUS MEDIA

Info

Publication number
FR2396283A1
FR2396283A1 FR7819376A FR7819376A FR2396283A1 FR 2396283 A1 FR2396283 A1 FR 2396283A1 FR 7819376 A FR7819376 A FR 7819376A FR 7819376 A FR7819376 A FR 7819376A FR 2396283 A1 FR2396283 A1 FR 2396283A1
Authority
FR
France
Prior art keywords
temperature
dependent
pressure
measuring
density
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
FR7819376A
Other languages
French (fr)
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of FR2396283A1 publication Critical patent/FR2396283A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
    • G01D1/16—Measuring arrangements giving results other than momentary value of variable, of general application giving a value which is a function of two or more values, e.g. product or ratio
    • 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
    • G01L9/02—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 ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
    • G01L9/06—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 ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices
    • G01L9/065—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 ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices with temperature compensating means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Fluid Pressure (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

When measuring the density of gaseous media, particularly for monitoring insulating gases for switchgear, there is the problem of simpler and cheaper construction, because of the large number of monitoring devices required. The solution comprises one pressure-dependent and temperature-dependent electrical measuring transducer, whose signals are combined in such a way as to produce an output signal (UA) which is at least approximately proportional to the pressure and inversely proportional to the temperature. Thus it is possible to register a pressure-dependent and a temperature-dependent signal in separate measuring transducers and to superimpose them by multiplication or by forming the quotient. It is particularly advantageous to employ a piezoresistive pressure measuring transducer (MWP) which is connected to an electrical power source (QI) having an output variable (IB) inversely proportional to the temperature.
FR7819376A 1977-07-01 1978-06-28 DEVICE FOR MEASURING THE DENSITY OF GASEOUS MEDIA Pending FR2396283A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH809777A CH616743A5 (en) 1977-07-01 1977-07-01 Device for measuring the density of gaseous media.

Publications (1)

Publication Number Publication Date
FR2396283A1 true FR2396283A1 (en) 1979-01-26

Family

ID=4335108

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7819376A Pending FR2396283A1 (en) 1977-07-01 1978-06-28 DEVICE FOR MEASURING THE DENSITY OF GASEOUS MEDIA

Country Status (6)

Country Link
JP (1) JPS5414270A (en)
CH (1) CH616743A5 (en)
DE (1) DE2736946A1 (en)
FR (1) FR2396283A1 (en)
NL (1) NL7806940A (en)
SU (1) SU884587A3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2914037C2 (en) * 1979-04-06 1983-12-08 Siemens AG, 1000 Berlin und 8000 München Device for rendering ineffective deviations in the output voltage of a pressure transducer in magnetic tape recorders caused by temperature fluctuations
JPS5686331A (en) * 1979-12-17 1981-07-14 Toshiba Corp Measuring device of gas density
JPS59184819A (en) * 1983-04-06 1984-10-20 Hitachi Ltd Semiconductor pressure sensor
JPS63206634A (en) * 1987-02-24 1988-08-25 Toshiba Corp Gas density sensor
FR2872572B1 (en) * 2004-06-30 2006-09-22 Commissariat Energie Atomique TESTING THE SEALING OF MEMS OR SMALL ENCAPSULATED COMPONENTS
RU2531043C1 (en) * 2013-07-26 2014-10-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тверской государственный технический университет" Laboratory analyser of gas density

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1366909A (en) * 1963-06-05 1964-07-17 Bagneux S A Atel Const Device for calculating air density and its application to helicopters
FR1467112A (en) * 1965-12-08 1967-01-27 Thomson Houston Comp Francaise Improvements to methods and devices for determining the density of a gas
US3967188A (en) * 1973-05-24 1976-06-29 Bell & Howell Company Temperature compensation circuit for sensor of physical variables such as temperature and pressure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162043A (en) * 1960-08-12 1964-12-22 Giannini Controls Corp Compensated air density computer
US3862568A (en) * 1972-06-22 1975-01-28 Itt Method of and apparatus for producing fluid gravity and density analogs and flowmeters incorporating gravitometers
AT331539B (en) * 1972-10-25 1976-08-25 Kratky Otto Dr Dr E H DEVICE FOR MEASURING DENSITY

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1366909A (en) * 1963-06-05 1964-07-17 Bagneux S A Atel Const Device for calculating air density and its application to helicopters
FR1467112A (en) * 1965-12-08 1967-01-27 Thomson Houston Comp Francaise Improvements to methods and devices for determining the density of a gas
US3967188A (en) * 1973-05-24 1976-06-29 Bell & Howell Company Temperature compensation circuit for sensor of physical variables such as temperature and pressure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/74 *

Also Published As

Publication number Publication date
SU884587A3 (en) 1981-11-23
DE2736946A1 (en) 1979-01-18
CH616743A5 (en) 1980-04-15
NL7806940A (en) 1979-01-03
JPS6147371B2 (en) 1986-10-18
JPS5414270A (en) 1979-02-02

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