JPS56153256A - Direct-reading current meter - Google Patents

Direct-reading current meter

Info

Publication number
JPS56153256A
JPS56153256A JP5631180A JP5631180A JPS56153256A JP S56153256 A JPS56153256 A JP S56153256A JP 5631180 A JP5631180 A JP 5631180A JP 5631180 A JP5631180 A JP 5631180A JP S56153256 A JPS56153256 A JP S56153256A
Authority
JP
Japan
Prior art keywords
frequency
heating
current
heat
counter
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
JP5631180A
Other languages
Japanese (ja)
Inventor
Shohei Takagi
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.)
National Aerospace Laboratory of Japan
Original Assignee
National Aerospace Laboratory of Japan
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 National Aerospace Laboratory of Japan filed Critical National Aerospace Laboratory of Japan
Priority to JP5631180A priority Critical patent/JPS56153256A/en
Publication of JPS56153256A publication Critical patent/JPS56153256A/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
    • G01P5/18—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance

Landscapes

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

Abstract

PURPOSE:To realize a direct reading for the speed of current, by detecting the vibrating fluid caused by heating with two pieces of detecting elements and then selecting the heating frequency so that the phase always satisfy a specific relation. CONSTITUTION:The heating wire 3 is heated by the output obtained by amplifying 9 the output of the frequency variable oscillator 6, and the frequency at this moment is monitored by the counter 7. The heat current flows down by the heating of wire 3, and this heat current vibration is detected by the detecting elements 4 and 5. The outputs obtained at the heat detectors 10 and 11 are applied to the X and Y axes of synchroscope 12. Then the frequency of oscillator 6 is controlled to secure a phase difference of 180 deg. for the displayed waveform, and the speed of current is read directly from the frequency of counter 7 at the moment when the phase difference becomes 180 deg..
JP5631180A 1980-04-30 1980-04-30 Direct-reading current meter Pending JPS56153256A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5631180A JPS56153256A (en) 1980-04-30 1980-04-30 Direct-reading current meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5631180A JPS56153256A (en) 1980-04-30 1980-04-30 Direct-reading current meter

Publications (1)

Publication Number Publication Date
JPS56153256A true JPS56153256A (en) 1981-11-27

Family

ID=13023596

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5631180A Pending JPS56153256A (en) 1980-04-30 1980-04-30 Direct-reading current meter

Country Status (1)

Country Link
JP (1) JPS56153256A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999034198A3 (en) * 1997-12-31 1999-09-10 Honeywell Inc Fluid property and flow sensing via a common frequency generator and fast fourier transformation
US6223593B1 (en) 1997-12-31 2001-05-01 Honeywell International Inc. Self-oscillating fluid sensor
US6393894B1 (en) 1999-07-27 2002-05-28 Honeywell International Inc. Gas sensor with phased heaters for increased sensitivity
US6502459B1 (en) 2000-09-01 2003-01-07 Honeywell International Inc. Microsensor for measuring velocity and angular direction of an incoming air stream
US7000452B2 (en) 2002-09-27 2006-02-21 Honeywell International Inc. Phased micro fluid analyzer
US7104112B2 (en) 2002-09-27 2006-09-12 Honeywell International Inc. Phased micro analyzer IV
US7367216B2 (en) 2002-09-27 2008-05-06 Honeywell International Inc. Phased micro analyzer V, VI
US7530257B2 (en) 2002-09-27 2009-05-12 Honeywell International Inc. Phased micro analyzer VIII
US7578167B2 (en) 2005-05-17 2009-08-25 Honeywell International Inc. Three-wafer channel structure for a fluid analyzer

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999034198A3 (en) * 1997-12-31 1999-09-10 Honeywell Inc Fluid property and flow sensing via a common frequency generator and fast fourier transformation
US6169965B1 (en) 1997-12-31 2001-01-02 Honeywell International Inc. Fluid property and flow sensing via a common frequency generator and FFT
US6223593B1 (en) 1997-12-31 2001-05-01 Honeywell International Inc. Self-oscillating fluid sensor
EP1329712A1 (en) * 1997-12-31 2003-07-23 Honeywell Inc. Fluid property and flow sensing via a common frequency generator and fast fourier transform
US6393894B1 (en) 1999-07-27 2002-05-28 Honeywell International Inc. Gas sensor with phased heaters for increased sensitivity
US6502459B1 (en) 2000-09-01 2003-01-07 Honeywell International Inc. Microsensor for measuring velocity and angular direction of an incoming air stream
US7000452B2 (en) 2002-09-27 2006-02-21 Honeywell International Inc. Phased micro fluid analyzer
US7104112B2 (en) 2002-09-27 2006-09-12 Honeywell International Inc. Phased micro analyzer IV
US7367216B2 (en) 2002-09-27 2008-05-06 Honeywell International Inc. Phased micro analyzer V, VI
US7530257B2 (en) 2002-09-27 2009-05-12 Honeywell International Inc. Phased micro analyzer VIII
US7578167B2 (en) 2005-05-17 2009-08-25 Honeywell International Inc. Three-wafer channel structure for a fluid analyzer

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