JPS5777915A - Fluid measuring apparatus - Google Patents
Fluid measuring apparatusInfo
- Publication number
- JPS5777915A JPS5777915A JP55153264A JP15326480A JPS5777915A JP S5777915 A JPS5777915 A JP S5777915A JP 55153264 A JP55153264 A JP 55153264A JP 15326480 A JP15326480 A JP 15326480A JP S5777915 A JPS5777915 A JP S5777915A
- Authority
- JP
- Japan
- Prior art keywords
- drive
- fluid
- flow
- ultrasonic
- time
- 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
- 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)
Abstract
PURPOSE:To achieve a measurement of a fluid without error by measuring difference in the propagation time of ultrasonic waves and the sum of the propagation time of the waves emitted with the simultaneous driving of a pair of ultrasonic vibrators facing each other until the vibrators receive the waves from each other. CONSTITUTION:A pair of ultrasonic vibrators 3a and 3b are arranged facing each other on the line diagonally crossing the flow 2 of a fluid at an angle of theta in a measuring tube 1. A drive timing generation circuit 5 provides a drive timing signal to drive a vibrator 3a with a drive circuit 6a and a vibrator 3b with a drive circuit 6b simultaneously. A clock measuring circuits 9a and 9b measure the time from the generation of the drive timing signal until the generation of the output pulse of waveform shaping circuits 8a and 8b and generate numeral signals equivalent to the propagation times T1 and T2 of ultrasonic pulses emitted in the directions the same as and opposite to the flow of the fluid. The propagation times T1 and T2 thus measured are inputted into an arithmetic circuit 13 which determines a difference in the time and the sum thereof. Based on the results, the velocity of the flow is calculated.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55153264A JPS5777915A (en) | 1980-10-31 | 1980-10-31 | Fluid measuring apparatus |
| EP19810109303 EP0051293B1 (en) | 1980-10-31 | 1981-10-29 | Respiration flowmeter |
| DE8181109303T DE3171832D1 (en) | 1980-10-31 | 1981-10-29 | Respiration flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55153264A JPS5777915A (en) | 1980-10-31 | 1980-10-31 | Fluid measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5777915A true JPS5777915A (en) | 1982-05-15 |
Family
ID=15558647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55153264A Pending JPS5777915A (en) | 1980-10-31 | 1980-10-31 | Fluid measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5777915A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4483202A (en) * | 1982-03-29 | 1984-11-20 | Tokyo Shibaura Denki Kabushiki Kaisha | Ultrasonic flowmeter |
-
1980
- 1980-10-31 JP JP55153264A patent/JPS5777915A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4483202A (en) * | 1982-03-29 | 1984-11-20 | Tokyo Shibaura Denki Kabushiki Kaisha | Ultrasonic flowmeter |
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