JPS57158515A - Differential pressure flow meter - Google Patents
Differential pressure flow meterInfo
- Publication number
- JPS57158515A JPS57158515A JP4461281A JP4461281A JPS57158515A JP S57158515 A JPS57158515 A JP S57158515A JP 4461281 A JP4461281 A JP 4461281A JP 4461281 A JP4461281 A JP 4461281A JP S57158515 A JPS57158515 A JP S57158515A
- Authority
- JP
- Japan
- Prior art keywords
- specific weight
- temperature
- pressure
- differential pressure
- factor
- 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
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/02—Compensating or correcting for variations in pressure, density or temperature
Landscapes
- Measuring Volume Flow (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Flowmeters (AREA)
Abstract
PURPOSE:To correct gaseous pressure and a temperature error, by deriving a specific weight factor of gas, its saturation temperature and its specific weight correction factor in accordance with measuring pressure, obtaining a corrected specific weight, and deriving a flow rate by use of this specific weight. CONSTITUTION:A differential pressure detector 21 having a throttle mechanism, a temperature detector 22 and a pressure detector 23 are provided on a pipe 18 in which gas to be measured flows, and differential pressure DELTAP, a temperature T and pressure P are measured, respectively. Also, as to measuring pressure P, tables 24, 25 and 26 which have stored relation of a specific weight correction factor (a), a variation factor (b) of specific weight per a unit temperature, and a saturation temperature T' are provided, and signals (a), (b) and T' corresponding to the pressure P are outputted. Subsequently, a difference between a measured temperature T and a saturation temperature T' is operated 27, is multiplied 28 by the variation factor (b) of specific weight, a specific weight correction factor (c) is obtained, also it is multiplied 31 by the specific weight correction factor (a), corrected specific weight (gamma) is derived, and when a flow rate Q=alpha(DELTAP/r)<1/2> is operated 32 by this corrected specific weight (gamma) and the differential pressure DELTAP, the flow rate is derived without gaseous pressure and a temperature error.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4461281A JPS57158515A (en) | 1981-03-25 | 1981-03-25 | Differential pressure flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4461281A JPS57158515A (en) | 1981-03-25 | 1981-03-25 | Differential pressure flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57158515A true JPS57158515A (en) | 1982-09-30 |
Family
ID=12696259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4461281A Pending JPS57158515A (en) | 1981-03-25 | 1981-03-25 | Differential pressure flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57158515A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6025917U (en) * | 1983-07-29 | 1985-02-21 | 株式会社 金門製作所 | Gas supply amount measuring device |
| JPH02287120A (en) * | 1989-04-27 | 1990-11-27 | Mitsubishi Heavy Ind Ltd | Dyestuff type flow measuring device |
-
1981
- 1981-03-25 JP JP4461281A patent/JPS57158515A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6025917U (en) * | 1983-07-29 | 1985-02-21 | 株式会社 金門製作所 | Gas supply amount measuring device |
| JPH02287120A (en) * | 1989-04-27 | 1990-11-27 | Mitsubishi Heavy Ind Ltd | Dyestuff type flow measuring device |
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