JPS5752866A - Flow speed measuring device - Google Patents

Flow speed measuring device

Info

Publication number
JPS5752866A
JPS5752866A JP12751880A JP12751880A JPS5752866A JP S5752866 A JPS5752866 A JP S5752866A JP 12751880 A JP12751880 A JP 12751880A JP 12751880 A JP12751880 A JP 12751880A JP S5752866 A JPS5752866 A JP S5752866A
Authority
JP
Japan
Prior art keywords
tubes
metallic
fluid
tube
thin
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
JP12751880A
Other languages
Japanese (ja)
Inventor
Yasuo Mori
Hiroshi Ochiai
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.)
TOKYO KEISOU KK
Tokyo Keiso Co Ltd
Original Assignee
TOKYO KEISOU KK
Tokyo Keiso 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 TOKYO KEISOU KK, Tokyo Keiso Co Ltd filed Critical TOKYO KEISOU KK
Priority to JP12751880A priority Critical patent/JPS5752866A/en
Priority to DE19803036606 priority patent/DE3036606A1/en
Publication of JPS5752866A publication Critical patent/JPS5752866A/en
Pending 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
    • 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

Landscapes

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

Abstract

PURPOSE: To compensate values of physical properties of a fluid, by conducting an electric current to two metallic tubes having different diameters to each other placed in a fluid and to one metallic tube not influenced by a flow and by using the temperature difference between said metallic tubes and the other metallic tube through which a current is not conducted and said current value.
CONSTITUTION: Metallic thin tubes 21, 22 (the whole length l1, l2) having different diameters are placed in a fluid rectangularly against the flow, and a metallic thin tube 23 is placed in a case 32 having holes 33a, 33b so as not to be affected by the flow. These thin tubes 21W23 have resistance values l2Wl3, and an electric current is supplied from a measuring circuit 31 to these thin tubes for heating by Joule heat. Further, since a thin tube 24 is put in a fluid, without being heated, its temperature becomes equal to the temperature of the fluid. Respectively temperature differences T1WT3 among the tube 24 and the tubes 21W23 are detected by means of thermocouples 25W27 respectively, and currents through the respective thin tubes are controlled such that said temperature differences are kept at constant. These currents are converted via resistances C1WC3 to voltages V1WV3, and the metallic tubes 21 and 22 are made to be ΔT1l1/ C1 2R1=ΔT2l2C2 2R2. Further, with the execution of operation of (V1 2the execution of operation of (V1 2-V2 2)/V3 2, a flow speed can be measured without being affected by the values of physical properties.
COPYRIGHT: (C)1982,JPO&Japio
JP12751880A 1980-09-13 1980-09-13 Flow speed measuring device Pending JPS5752866A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP12751880A JPS5752866A (en) 1980-09-13 1980-09-13 Flow speed measuring device
DE19803036606 DE3036606A1 (en) 1980-09-13 1980-09-29 Fluid flow speed measurement - utilises temperatures inside electrically conducting immersed tubes of different diameters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12751880A JPS5752866A (en) 1980-09-13 1980-09-13 Flow speed measuring device

Publications (1)

Publication Number Publication Date
JPS5752866A true JPS5752866A (en) 1982-03-29

Family

ID=14961990

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12751880A Pending JPS5752866A (en) 1980-09-13 1980-09-13 Flow speed measuring device

Country Status (2)

Country Link
JP (1) JPS5752866A (en)
DE (1) DE3036606A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3608538A1 (en) * 1986-03-14 1987-09-17 Bosch Gmbh Robert CIRCUIT ARRANGEMENT WITH A FLOW PROBE OPERATING IN BRIDGE CIRCUIT
US4969357A (en) * 1988-06-27 1990-11-13 Mickler Brian E Compensated thermal flux mass flowmeter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5424681A (en) * 1977-07-27 1979-02-24 Tokyo Keiso Kk Method of measuring current velocity

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5424681A (en) * 1977-07-27 1979-02-24 Tokyo Keiso Kk Method of measuring current velocity

Also Published As

Publication number Publication date
DE3036606A1 (en) 1982-05-06

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