JPS56124018A - Zero-point adjustment method for ultrasonic flow meter - Google Patents
Zero-point adjustment method for ultrasonic flow meterInfo
- Publication number
- JPS56124018A JPS56124018A JP2668080A JP2668080A JPS56124018A JP S56124018 A JPS56124018 A JP S56124018A JP 2668080 A JP2668080 A JP 2668080A JP 2668080 A JP2668080 A JP 2668080A JP S56124018 A JPS56124018 A JP S56124018A
- Authority
- JP
- Japan
- Prior art keywords
- zero
- point
- control circuit
- point adjustment
- changed over
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
PURPOSE:To arrange so that the equal adjustment at a zero point of two frequencies to be detected by a pair of detector may be made with an ultrasonic propagation direction fixed at time of zero-point adjustment and subsequently the zero-point may be easily adjusted without stopping the flow of a fluid, by providing an auxiliary control circuit. CONSTITUTION:When a zero-point adjustment is carried out, first a change-over switch 21A is changed over to the TEST side, thus connecting a control circuit 10 with an auxiliary control circuit 20. As a result, the change-over switches 11A and 11B are synchronized with each other, being changed over to the (a) side. At the same time, an ultrasonic vibrator 1 is always at the transmission side. Then it is changed over to the (b) side and this time, an ultrasonic vibrator 1' is at the transmission side. Simultaneously the oscillation frequencies of voltage control oscillators 14 and 14 are connected to be equalized, thus making available a state where the fluid is stationary at an equivalent rate. Under this status, for instance, an output signal from a frequency-voltage conversion circuit 19 has only to be adjusted so that said signal may be equivalent to zero or a specified value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2668080A JPS56124018A (en) | 1980-03-05 | 1980-03-05 | Zero-point adjustment method for ultrasonic flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2668080A JPS56124018A (en) | 1980-03-05 | 1980-03-05 | Zero-point adjustment method for ultrasonic flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56124018A true JPS56124018A (en) | 1981-09-29 |
Family
ID=12200104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2668080A Pending JPS56124018A (en) | 1980-03-05 | 1980-03-05 | Zero-point adjustment method for ultrasonic flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56124018A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100720236B1 (en) | 2002-08-05 | 2007-05-22 | 마츠시타 덴끼 산교 가부시키가이샤 | Flow meter |
-
1980
- 1980-03-05 JP JP2668080A patent/JPS56124018A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100720236B1 (en) | 2002-08-05 | 2007-05-22 | 마츠시타 덴끼 산교 가부시키가이샤 | Flow meter |
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