JPS5621015A - Electromagnetic flow meter - Google Patents
Electromagnetic flow meterInfo
- Publication number
- JPS5621015A JPS5621015A JP9704779A JP9704779A JPS5621015A JP S5621015 A JPS5621015 A JP S5621015A JP 9704779 A JP9704779 A JP 9704779A JP 9704779 A JP9704779 A JP 9704779A JP S5621015 A JPS5621015 A JP S5621015A
- Authority
- JP
- Japan
- Prior art keywords
- current
- commercial power
- exciting
- flow rate
- voltage
- 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 simplify a construction, by supplying an exciting coil with an alternating current of lower frequency than commercial power or with an alternating current whose frequency is lower than that of the commercial power and which has a section wherein the magnitude of the current does not vary with the lapse of time.
CONSTITUTION: The voltage of commercial power 10 is turned on and off by a switch 11 and rectified by a full wave rectifier 11. An exciting current of lower frequency than the commercial power 10 is supplied to the exciting coil 3 of an oscillator. The exciting current is a pulsating current defined by the time constant of the coil 3. When a measured fluid Q flows through the oscillator, a flow rate signal voltage similar to the exciting current appears across flow rate detection electrodes 7a, 7b. The signal voltage is sampled by a synchronous rectification circuit in a division circuit 9 while the exciting current is constant. The ratio of the signal voltage to a compared voltage appearing across a resistor 13 is determined. A flow rate signal is picked out from an output terminal 16.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9704779A JPS5621015A (en) | 1979-07-30 | 1979-07-30 | Electromagnetic flow meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9704779A JPS5621015A (en) | 1979-07-30 | 1979-07-30 | Electromagnetic flow meter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5621015A true JPS5621015A (en) | 1981-02-27 |
Family
ID=14181727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9704779A Pending JPS5621015A (en) | 1979-07-30 | 1979-07-30 | Electromagnetic flow meter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5621015A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4969363A (en) * | 1988-03-29 | 1990-11-13 | Aichi Tokei Denki Co., Ltd. | Electromagnetic flowmeter capable of simultaneous measurement of flow rate and conductivity of fluid |
CN104266697A (en) * | 2014-10-22 | 2015-01-07 | 中山欧麦克仪器设备有限公司 | High-accuracy electromagnetic flow meter |
-
1979
- 1979-07-30 JP JP9704779A patent/JPS5621015A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4969363A (en) * | 1988-03-29 | 1990-11-13 | Aichi Tokei Denki Co., Ltd. | Electromagnetic flowmeter capable of simultaneous measurement of flow rate and conductivity of fluid |
CN104266697A (en) * | 2014-10-22 | 2015-01-07 | 中山欧麦克仪器设备有限公司 | High-accuracy electromagnetic flow meter |
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