JPS5749812A - Electromagnetic flowmeter converter - Google Patents
Electromagnetic flowmeter converterInfo
- Publication number
- JPS5749812A JPS5749812A JP12577480A JP12577480A JPS5749812A JP S5749812 A JPS5749812 A JP S5749812A JP 12577480 A JP12577480 A JP 12577480A JP 12577480 A JP12577480 A JP 12577480A JP S5749812 A JPS5749812 A JP S5749812A
- Authority
- JP
- Japan
- Prior art keywords
- exciting
- signal
- pulses
- multiplier
- period
- 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
- G01F1/56—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 using electric or magnetic effects
- G01F1/58—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 using electric or magnetic effects by electromagnetic flowmeters
- G01F1/60—Circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
PURPOSE:To obtain the electromagnetic flow meter converter which is capable of highly accurate measurement with a good S/N ratio, by synchronizing pulses having a specified voltage or current with an exciting period and by multiplying said pulses to a sensed signal from a flow rate sensing part. CONSTITUTION:An exciting current is flowed to a sensing coil 4 of a sensing end 3 from an exciting circuit 2 in synchronization with the exciting signal from a timing circuit 1. The output signal Ei from the coil 4 is amplified by a preamplifier 5, and the amplified signal is inputted to a multiplier 11. To the multiplier 11, the output from a reference pulse amplifier 10 which generates the pulses synchronized with the exciting signal of the timing circuit 1 is inputted. In this constitution, since the average output Eo of the multiplier 11 is given by an equation (1), noises in the sensed signal can be removed if the pulse width of the reference pulses is made to be the period of a commercial power source, and the S/N ratio is improved. In the equation, K and K' are constants which are determined by the amplification degree of the preamplifier 5 and the like, T is period of the reference pulse, and ER is the magnitude of the reference pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12577480A JPS5749812A (en) | 1980-09-10 | 1980-09-10 | Electromagnetic flowmeter converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12577480A JPS5749812A (en) | 1980-09-10 | 1980-09-10 | Electromagnetic flowmeter converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5749812A true JPS5749812A (en) | 1982-03-24 |
Family
ID=14918496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12577480A Pending JPS5749812A (en) | 1980-09-10 | 1980-09-10 | Electromagnetic flowmeter converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5749812A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6530402B2 (en) * | 2000-06-06 | 2003-03-11 | Yamatake Corporation | Filling machine |
| EP2005121B1 (en) * | 2006-03-14 | 2019-12-11 | Micro Motion, Inc. | Reduced noise sensitivity in magnetic flowmeter |
-
1980
- 1980-09-10 JP JP12577480A patent/JPS5749812A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6530402B2 (en) * | 2000-06-06 | 2003-03-11 | Yamatake Corporation | Filling machine |
| EP2005121B1 (en) * | 2006-03-14 | 2019-12-11 | Micro Motion, Inc. | Reduced noise sensitivity in magnetic flowmeter |
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