JPS56153256A - Direct-reading current meter - Google Patents
Direct-reading current meterInfo
- 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
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..
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)
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 |
-
1980
- 1980-04-30 JP JP5631180A patent/JPS56153256A/en active Pending
Cited By (11)
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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