JPS54115164A - Electromagnetic flowmeter - Google Patents
Electromagnetic flowmeterInfo
- Publication number
- JPS54115164A JPS54115164A JP2229278A JP2229278A JPS54115164A JP S54115164 A JPS54115164 A JP S54115164A JP 2229278 A JP2229278 A JP 2229278A JP 2229278 A JP2229278 A JP 2229278A JP S54115164 A JPS54115164 A JP S54115164A
- Authority
- JP
- Japan
- Prior art keywords
- period
- exciting current
- exciting
- coil
- τoff
- 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 eliminate the need for remedy against evolution of heat such as installation of a large heat sink or the like by providing the period of not flowing exciting current to an exciting coil.
CONSTITUTION: The exciting current Iw having ON period τON and OFF period τOFF is supplied to an exciting coil 5. When changed over with semiconductor switches 3, 3, the exciting current Iw becomes of a steady value after accompanying a delay at the rise portion at the time constant by the inductance L of the coil 5 and a resistance R. Here, the OFF period when no exciting current is flowed is provided and therefore if, for example, the OFF period τOFF is selected thrice the ON period τON, the mean value of the exciting current becomes 1/4 that of conventional flowmeters having no OFF period, thus the power consumption as a flowmeter decreases and in addition, the joule heat evolved in the switch element and exciting coil 5 decreases accordingly.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2229278A JPS54115164A (en) | 1978-02-28 | 1978-02-28 | Electromagnetic flowmeter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2229278A JPS54115164A (en) | 1978-02-28 | 1978-02-28 | Electromagnetic flowmeter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54115164A true JPS54115164A (en) | 1979-09-07 |
Family
ID=12078664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2229278A Pending JPS54115164A (en) | 1978-02-28 | 1978-02-28 | Electromagnetic flowmeter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54115164A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4561311A (en) * | 1981-12-11 | 1985-12-31 | The Babcock & Wilcox Company | Bridge excitation for sensor used on a vortex shedding flow meter |
US4766770A (en) * | 1984-03-30 | 1988-08-30 | Fischer & Porter Company | Low duty cycle electromagnetic flowmeter |
JP2001522457A (en) * | 1997-04-25 | 2001-11-13 | エービービー メータリング リミテッド | Electromagnetic flow meter |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4974565A (en) * | 1972-11-16 | 1974-07-18 | ||
JPS5177355A (en) * | 1974-12-27 | 1976-07-05 | Tokyo Shibaura Electric Co | DENJIRYURYOKEI |
-
1978
- 1978-02-28 JP JP2229278A patent/JPS54115164A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4974565A (en) * | 1972-11-16 | 1974-07-18 | ||
JPS5177355A (en) * | 1974-12-27 | 1976-07-05 | Tokyo Shibaura Electric Co | DENJIRYURYOKEI |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4561311A (en) * | 1981-12-11 | 1985-12-31 | The Babcock & Wilcox Company | Bridge excitation for sensor used on a vortex shedding flow meter |
US4766770A (en) * | 1984-03-30 | 1988-08-30 | Fischer & Porter Company | Low duty cycle electromagnetic flowmeter |
JP2001522457A (en) * | 1997-04-25 | 2001-11-13 | エービービー メータリング リミテッド | Electromagnetic flow meter |
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