FR2246846A1 - Linear flow meter based on thermodynamic laws - measures temp upstream and downstream of heat source in fluid flow - Google Patents

Linear flow meter based on thermodynamic laws - measures temp upstream and downstream of heat source in fluid flow

Info

Publication number
FR2246846A1
FR2246846A1 FR7336030A FR7336030A FR2246846A1 FR 2246846 A1 FR2246846 A1 FR 2246846A1 FR 7336030 A FR7336030 A FR 7336030A FR 7336030 A FR7336030 A FR 7336030A FR 2246846 A1 FR2246846 A1 FR 2246846A1
Authority
FR
France
Prior art keywords
heat source
downstream
upstream
temp
measures
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.)
Granted
Application number
FR7336030A
Other languages
French (fr)
Other versions
FR2246846B1 (en
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.)
Thales SA
Original Assignee
Thomson CSF 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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7336030A priority Critical patent/FR2246846A1/en
Publication of FR2246846A1 publication Critical patent/FR2246846A1/en
Application granted granted Critical
Publication of FR2246846B1 publication Critical patent/FR2246846B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element
    • G01F1/6888—Thermoelectric elements, e.g. thermocouples, thermopiles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

Gas (1) whose flow is to be measured passes along a tube (2) containing a resistive heat source (3) powered from a regulated supply (40) ensuring a constant number of calories per unit time. Two thermometric probes with low thermal inertia are placed upstream (4) and downstream (7) of the heat source. Two probe outputs (5, 8) of the same polarity are connected together (50) while the second outputs (6, 9) provide an output voltage proportional to temperature differences of the probes. The flow is determined from this measurement using the calorific capacity of the gas and heat flow. A thermal screen (10) between the heat source and downstream probe aids mminiaturisation.
FR7336030A 1973-10-09 1973-10-09 Linear flow meter based on thermodynamic laws - measures temp upstream and downstream of heat source in fluid flow Granted FR2246846A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7336030A FR2246846A1 (en) 1973-10-09 1973-10-09 Linear flow meter based on thermodynamic laws - measures temp upstream and downstream of heat source in fluid flow

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7336030A FR2246846A1 (en) 1973-10-09 1973-10-09 Linear flow meter based on thermodynamic laws - measures temp upstream and downstream of heat source in fluid flow

Publications (2)

Publication Number Publication Date
FR2246846A1 true FR2246846A1 (en) 1975-05-02
FR2246846B1 FR2246846B1 (en) 1976-06-18

Family

ID=9126134

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7336030A Granted FR2246846A1 (en) 1973-10-09 1973-10-09 Linear flow meter based on thermodynamic laws - measures temp upstream and downstream of heat source in fluid flow

Country Status (1)

Country Link
FR (1) FR2246846A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487973A1 (en) * 1980-08-01 1982-02-05 Soule Sa THERMAL FLOW METER: METHOD AND ELECTRONIC DEVICES FOR MEASURING THE FLOW OF A FLUID ACCORDING TO VARIATIONS IN ITS TEMPERATURE
WO1991019170A1 (en) * 1990-06-04 1991-12-12 Mcpherson's Limited Flow sensor and control system
DE102009045958A1 (en) * 2009-10-23 2011-05-12 Endress + Hauser Flowtec Ag Thermal flowmeter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487973A1 (en) * 1980-08-01 1982-02-05 Soule Sa THERMAL FLOW METER: METHOD AND ELECTRONIC DEVICES FOR MEASURING THE FLOW OF A FLUID ACCORDING TO VARIATIONS IN ITS TEMPERATURE
WO1991019170A1 (en) * 1990-06-04 1991-12-12 Mcpherson's Limited Flow sensor and control system
DE102009045958A1 (en) * 2009-10-23 2011-05-12 Endress + Hauser Flowtec Ag Thermal flowmeter
US8583385B2 (en) 2009-10-23 2013-11-12 Endress + Hauser Flowtec Ag Thermal, flow measuring device

Also Published As

Publication number Publication date
FR2246846B1 (en) 1976-06-18

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Legal Events

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