JPS61120923A - 連続波超音波流速計 - Google Patents
連続波超音波流速計Info
- Publication number
- JPS61120923A JPS61120923A JP59244128A JP24412884A JPS61120923A JP S61120923 A JPS61120923 A JP S61120923A JP 59244128 A JP59244128 A JP 59244128A JP 24412884 A JP24412884 A JP 24412884A JP S61120923 A JPS61120923 A JP S61120923A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- output
- frequency
- pll
- 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
Links
- 230000010355 oscillation Effects 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 14
- 239000012530 fluid Substances 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 101100171060 Caenorhabditis elegans div-1 gene Proteins 0.000 abstract 2
- 230000001902 propagating effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000002604 ultrasonography Methods 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- 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)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59244128A JPS61120923A (ja) | 1984-11-19 | 1984-11-19 | 連続波超音波流速計 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59244128A JPS61120923A (ja) | 1984-11-19 | 1984-11-19 | 連続波超音波流速計 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61120923A true JPS61120923A (ja) | 1986-06-09 |
| JPH053885B2 JPH053885B2 (cg-RX-API-DMAC7.html) | 1993-01-18 |
Family
ID=17114178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59244128A Granted JPS61120923A (ja) | 1984-11-19 | 1984-11-19 | 連続波超音波流速計 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61120923A (cg-RX-API-DMAC7.html) |
-
1984
- 1984-11-19 JP JP59244128A patent/JPS61120923A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH053885B2 (cg-RX-API-DMAC7.html) | 1993-01-18 |