FR2248512A1 - Fluid flow anemometer - has a transistor sensor and ambient temperature change compensation - Google Patents

Fluid flow anemometer - has a transistor sensor and ambient temperature change compensation

Info

Publication number
FR2248512A1
FR2248512A1 FR7337372A FR7337372A FR2248512A1 FR 2248512 A1 FR2248512 A1 FR 2248512A1 FR 7337372 A FR7337372 A FR 7337372A FR 7337372 A FR7337372 A FR 7337372A FR 2248512 A1 FR2248512 A1 FR 2248512A1
Authority
FR
France
Prior art keywords
transistor
heater
ambient temperature
fluid flow
temperature change
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
FR7337372A
Other languages
French (fr)
Other versions
FR2248512B1 (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.)
Bpifrance Financement SA
Original Assignee
Agence National de Valorisation de la Recherche ANVAR
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 Agence National de Valorisation de la Recherche ANVAR filed Critical Agence National de Valorisation de la Recherche ANVAR
Priority to FR7337372A priority Critical patent/FR2248512A1/en
Publication of FR2248512A1 publication Critical patent/FR2248512A1/en
Application granted granted Critical
Publication of FR2248512B1 publication Critical patent/FR2248512B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/10—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/02—Indicating direction only, e.g. by weather vane

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The anemometer has a tubular body (4) placed in the fluid with its axis parallel to the flow. A regulator controls the power supplied to the heater, and an electronic circuit can provide a signal dependent on the power supplied to the heater and proportional to the flow velocity. The sensor consists of a transistor (19) whose emitter electrode is connected to a low impedance. The heater is supplied by a constant current source connected to the collector electrode of the transistor (19). The regulator has a reference source, a transistor base polarising circuit and amplifier whose inputs are connected to the base of the transistor (19), and the reference source and amplifier output are connected to the collector of the transistor to maintain its voltage constant.
FR7337372A 1973-10-19 1973-10-19 Fluid flow anemometer - has a transistor sensor and ambient temperature change compensation Granted FR2248512A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7337372A FR2248512A1 (en) 1973-10-19 1973-10-19 Fluid flow anemometer - has a transistor sensor and ambient temperature change compensation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7337372A FR2248512A1 (en) 1973-10-19 1973-10-19 Fluid flow anemometer - has a transistor sensor and ambient temperature change compensation

Publications (2)

Publication Number Publication Date
FR2248512A1 true FR2248512A1 (en) 1975-05-16
FR2248512B1 FR2248512B1 (en) 1978-03-03

Family

ID=9126677

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7337372A Granted FR2248512A1 (en) 1973-10-19 1973-10-19 Fluid flow anemometer - has a transistor sensor and ambient temperature change compensation

Country Status (1)

Country Link
FR (1) FR2248512A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3048096A1 (en) * 1979-12-19 1981-09-24 Eluw Electronic AB, 95128 Luleå DEVICE FOR MEASURING AND / OR MONITORING THE FLOW RATE OF A FLOWING MEDIUM
NL1001340C2 (en) * 1995-10-04 1997-04-08 Zwaan Adrianus J Ventilation system provided with a ventilation device with an airflow direction sensor.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3048096A1 (en) * 1979-12-19 1981-09-24 Eluw Electronic AB, 95128 Luleå DEVICE FOR MEASURING AND / OR MONITORING THE FLOW RATE OF A FLOWING MEDIUM
NL1001340C2 (en) * 1995-10-04 1997-04-08 Zwaan Adrianus J Ventilation system provided with a ventilation device with an airflow direction sensor.
EP0767386A1 (en) * 1995-10-04 1997-04-09 Adrianus Jacobus Zwaan Ventilation system comprising a ventilating device with an air-flow direction sensor

Also Published As

Publication number Publication date
FR2248512B1 (en) 1978-03-03

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Legal Events

Date Code Title Description
ST Notification of lapse