JPS5719672A - Heat rays type flow velocity meter equipped with heat rays extraneous matter burning-off mechanism - Google Patents

Heat rays type flow velocity meter equipped with heat rays extraneous matter burning-off mechanism

Info

Publication number
JPS5719672A
JPS5719672A JP9388780A JP9388780A JPS5719672A JP S5719672 A JPS5719672 A JP S5719672A JP 9388780 A JP9388780 A JP 9388780A JP 9388780 A JP9388780 A JP 9388780A JP S5719672 A JPS5719672 A JP S5719672A
Authority
JP
Japan
Prior art keywords
resistance
heat rays
mid
point
adjusting
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
JP9388780A
Other languages
Japanese (ja)
Other versions
JPH0147749B2 (en
Inventor
Hiromasa Kubo
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.)
Hitachi Unisia Automotive Ltd
Original Assignee
Japan Electronic Control Systems 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 Japan Electronic Control Systems Co Ltd filed Critical Japan Electronic Control Systems Co Ltd
Priority to JP9388780A priority Critical patent/JPS5719672A/en
Publication of JPS5719672A publication Critical patent/JPS5719672A/en
Publication of JPH0147749B2 publication Critical patent/JPH0147749B2/ja
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
    • G01P5/12—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 using variation of resistance of a heated conductor
    • 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
    • G01F1/696—Circuits therefor, e.g. constant-current flow meters
    • G01F1/698—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
    • G01F1/6983—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters adapted for burning-off deposits

Landscapes

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

Abstract

PURPOSE:To perform burning-off extraneous matter produced by heat rays at prescribed temperature regardless of ambient temperature by preparing in a mid-point adjusting circuit a variable adjusting resistance for mid-point electric potential grounded together with a transistor and by connecting a constant-voltage regulated power independently to permit the potential mid-point of which varies to be constant. CONSTITUTION:A mid-point potential adjusting circuit 9 has transister TR10, 11, resistances 12, 13 and an input terminal A, actuated by a constant-voltage regulating power 14 through a resistance 15 and connected to a mid-point potential adjusting resistance 16 that is a variable resistance. The output is connected a middle point C on the side of an adjusting resistance R2. In this bridge circuit, the value of a combined resistance between the heat rays resistance RH and a reference resistance RM is set at a valve remarkably smaller than the total summed valve of temp. compensation resistance RK, a reference resistance R1 and an adjusting resistance R2 therefore the most parts of the bridge current flow on the side of heat rays. Accordingly, the heat rays are heated, and the desired burning-off temperature is obtained. Through said process it is possible to prevent a change of a characteristic caused by overheat by heat rays thereby enabling accurate measurement of flow velocity for a long period.
JP9388780A 1980-07-11 1980-07-11 Heat rays type flow velocity meter equipped with heat rays extraneous matter burning-off mechanism Granted JPS5719672A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9388780A JPS5719672A (en) 1980-07-11 1980-07-11 Heat rays type flow velocity meter equipped with heat rays extraneous matter burning-off mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9388780A JPS5719672A (en) 1980-07-11 1980-07-11 Heat rays type flow velocity meter equipped with heat rays extraneous matter burning-off mechanism

Publications (2)

Publication Number Publication Date
JPS5719672A true JPS5719672A (en) 1982-02-01
JPH0147749B2 JPH0147749B2 (en) 1989-10-16

Family

ID=14094984

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9388780A Granted JPS5719672A (en) 1980-07-11 1980-07-11 Heat rays type flow velocity meter equipped with heat rays extraneous matter burning-off mechanism

Country Status (1)

Country Link
JP (1) JPS5719672A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60154116A (en) * 1984-01-25 1985-08-13 Japan Electronic Control Syst Co Ltd Hot wire type flow meter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5476182A (en) * 1977-11-09 1979-06-18 Bosch Gmbh Robert Device for measuring quantity of air
JPS5576182A (en) * 1978-11-30 1980-06-09 Fuji Shoji Steel cord and tire using steel cord

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5476182A (en) * 1977-11-09 1979-06-18 Bosch Gmbh Robert Device for measuring quantity of air
JPS5576182A (en) * 1978-11-30 1980-06-09 Fuji Shoji Steel cord and tire using steel cord

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60154116A (en) * 1984-01-25 1985-08-13 Japan Electronic Control Syst Co Ltd Hot wire type flow meter

Also Published As

Publication number Publication date
JPH0147749B2 (en) 1989-10-16

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