JPS54158264A - Differential pressure type flow meter - Google Patents
Differential pressure type flow meterInfo
- Publication number
- JPS54158264A JPS54158264A JP6669478A JP6669478A JPS54158264A JP S54158264 A JPS54158264 A JP S54158264A JP 6669478 A JP6669478 A JP 6669478A JP 6669478 A JP6669478 A JP 6669478A JP S54158264 A JPS54158264 A JP S54158264A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- calculator
- differential pressure
- evolution
- metered
- 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
Landscapes
- Measuring Volume Flow (AREA)
Abstract
PURPOSE: To make it possible to accurately meter the flow rate up to a low flow rate with the use of a single differential pressure generating mechanism by varying a flow rate coefficient K as a function of the output of an evolution calculator under a preset flow rate.
CONSTITUTION: A pipe 1 for making a liquid flow therethrough is equipped with a differential pressure generating mechanism 2 for generating a differential pressure corresponding to the flow rate, and there are generated by a differential pressure transmitter 3 electric signals proportional to the differential pressure, the square root of which is calculated by an evolution calculator 4. The output of the calculator 4 is fed to an evolution calculator 5 and a multiplier 6, and the flow rate coefficient K from the calculator 5 and the output of the calculator 4 are multiplied by the multiplier 6 thereby to produce flow rate signals. In this case, if the metered flow rate is higher than a preset value, the flow rate coefficient expressed by the ratio between the true flow rate and the metered flow rate takes a preset value. At a low flow rate region, the flow rate coefficient, which is compensated by the calculator 5 and which is gradually augmented, is used so that the accurate flow rate can always be metered even at the low flow rate.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6669478A JPS54158264A (en) | 1978-06-05 | 1978-06-05 | Differential pressure type flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6669478A JPS54158264A (en) | 1978-06-05 | 1978-06-05 | Differential pressure type flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54158264A true JPS54158264A (en) | 1979-12-13 |
Family
ID=13323292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6669478A Pending JPS54158264A (en) | 1978-06-05 | 1978-06-05 | Differential pressure type flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54158264A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62259016A (en) * | 1986-04-25 | 1987-11-11 | Tokyo Keiki Co Ltd | Flow rate measuring instrument |
| JPS6370119A (en) * | 1986-09-12 | 1988-03-30 | Tokyo Keiki Co Ltd | Flow rate measuring apparatus |
| US5542286A (en) * | 1995-01-23 | 1996-08-06 | Hewlett-Packard Company | Method and apparatus for correcting flow and pressure sensor drift in a gas chromatograph |
-
1978
- 1978-06-05 JP JP6669478A patent/JPS54158264A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62259016A (en) * | 1986-04-25 | 1987-11-11 | Tokyo Keiki Co Ltd | Flow rate measuring instrument |
| JPS6370119A (en) * | 1986-09-12 | 1988-03-30 | Tokyo Keiki Co Ltd | Flow rate measuring apparatus |
| US5542286A (en) * | 1995-01-23 | 1996-08-06 | Hewlett-Packard Company | Method and apparatus for correcting flow and pressure sensor drift in a gas chromatograph |
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