JPH032819Y2 - - Google Patents
Info
- Publication number
- JPH032819Y2 JPH032819Y2 JP1990000066U JP6690U JPH032819Y2 JP H032819 Y2 JPH032819 Y2 JP H032819Y2 JP 1990000066 U JP1990000066 U JP 1990000066U JP 6690 U JP6690 U JP 6690U JP H032819 Y2 JPH032819 Y2 JP H032819Y2
- Authority
- JP
- Japan
- Prior art keywords
- gate
- circuit
- voltage
- output
- clock pulse
- 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.)
- Expired
Links
- 239000012530 fluid Substances 0.000 claims description 34
- 238000005259 measurement Methods 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 19
- 239000003990 capacitor Substances 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 16
- 238000005070 sampling Methods 0.000 claims description 12
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 230000010354 integration Effects 0.000 claims description 8
- 230000001419 dependent effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 239000013078 crystal Substances 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229940034610 toothpaste Drugs 0.000 description 1
- 239000000606 toothpaste Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- G01P5/24—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 direct influence of the streaming fluid on the properties of a detecting acoustical wave
- G01P5/245—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 direct influence of the streaming fluid on the properties of a detecting acoustical wave by measuring transit time of acoustical waves
-
- 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
- G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Aviation & Aerospace Engineering (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Measuring Volume Flow (AREA)
- Geophysics And Detection Of Objects (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7810630A NL7810630A (nl) | 1978-10-25 | 1978-10-25 | Inrichting voor het meten van de snelheid van fluidumstromingen. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02107025U JPH02107025U (en]) | 1990-08-24 |
| JPH032819Y2 true JPH032819Y2 (en]) | 1991-01-25 |
Family
ID=19831770
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50191579A Pending JPS55500844A (en]) | 1978-10-25 | 1979-10-25 | |
| JP1990000066U Expired JPH032819Y2 (en]) | 1978-10-25 | 1990-01-04 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50191579A Pending JPS55500844A (en]) | 1978-10-25 | 1979-10-25 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4367654A (en]) |
| EP (1) | EP0020537B1 (en]) |
| JP (2) | JPS55500844A (en]) |
| DE (1) | DE2966272D1 (en]) |
| NL (1) | NL7810630A (en]) |
| WO (1) | WO1980000876A1 (en]) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4817448A (en) * | 1986-09-03 | 1989-04-04 | Micro Motion, Inc. | Auto zero circuit for flow meter |
| FR2749652B1 (fr) * | 1996-06-07 | 1998-08-21 | Schlumberger Ind Sa | Procede de mesure du temps de propagation d'un signal acoustique dans un fluide par passage a zero dudit signal acoustique |
| US5777238A (en) * | 1996-06-12 | 1998-07-07 | Welch Allyn, Inc. | Driver-receiver apparatus for use with ultrasonic flowmeters |
| DE10163566A1 (de) * | 2001-12-21 | 2003-07-10 | Flowtec Ag | Pulsgenerator |
| EP2339301A1 (en) * | 2009-12-23 | 2011-06-29 | Kamstrup A/S | Ultrasonic flowmeter with simultaneously driven ultrasonic transducers |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1355634A (fr) * | 1963-02-02 | 1964-03-20 | Schlumberger Prospection | Appareil de mesure de la vitesse d'écoulement des fluides |
| DE2010742A1 (en]) * | 1969-03-06 | 1970-10-15 | ||
| US4080574A (en) * | 1974-01-31 | 1978-03-21 | United Kingdom Atomic Energy Authority | Apparatus for providing time reference signals |
| JPS5437949B2 (en]) * | 1974-07-13 | 1979-11-17 | ||
| US3940985A (en) * | 1975-04-18 | 1976-03-02 | Westinghouse Electric Corporation | Fluid flow measurement system for pipes |
| GB1602185A (en) * | 1977-06-03 | 1981-11-11 | Standard Telephones Cables Ltd | Measuring fluid flow |
| NL7713998A (nl) * | 1977-12-16 | 1979-06-19 | Tno | Inrichting voor het meten van de snelheid van fluidumstromingen. |
| NL7801401A (nl) * | 1978-02-07 | 1979-08-09 | Tno | Stelsel voor het meten van de snelheid en/of het debiet van een fluidum. |
-
1978
- 1978-10-25 NL NL7810630A patent/NL7810630A/nl not_active Application Discontinuation
-
1979
- 1979-10-25 DE DE7979901412T patent/DE2966272D1/de not_active Expired
- 1979-10-25 US US06/205,998 patent/US4367654A/en not_active Expired - Lifetime
- 1979-10-25 WO PCT/NL1979/000005 patent/WO1980000876A1/en unknown
- 1979-10-25 JP JP50191579A patent/JPS55500844A/ja active Pending
-
1980
- 1980-05-07 EP EP79901412A patent/EP0020537B1/en not_active Expired
-
1990
- 1990-01-04 JP JP1990000066U patent/JPH032819Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02107025U (en]) | 1990-08-24 |
| US4367654A (en) | 1983-01-11 |
| EP0020537B1 (en) | 1983-10-05 |
| JPS55500844A (en]) | 1980-10-23 |
| DE2966272D1 (en) | 1983-11-10 |
| EP0020537A1 (en) | 1981-01-07 |
| WO1980000876A1 (en) | 1980-05-01 |
| NL7810630A (nl) | 1980-04-29 |
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