JPS57519A - Electronic type flowmeter - Google Patents
Electronic type flowmeterInfo
- Publication number
- JPS57519A JPS57519A JP7405580A JP7405580A JPS57519A JP S57519 A JPS57519 A JP S57519A JP 7405580 A JP7405580 A JP 7405580A JP 7405580 A JP7405580 A JP 7405580A JP S57519 A JPS57519 A JP S57519A
- Authority
- JP
- Japan
- Prior art keywords
- intervals
- overflow
- controller
- flow rates
- pulse signal
- 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
- G01F15/06—Indicating or recording devices
- G01F15/061—Indicating or recording devices for remote indication
- G01F15/063—Indicating or recording devices for remote indication using electrical means
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Flowmeters (AREA)
Abstract
PURPOSE:To warn the use of water meters conforming to the rate of use to consumers by generating an overflow alarm when the repetitive time intervals of an object rotating repeatedly according to measuring flow rates is below a prescribed value. CONSTITUTION:The revolutions of the impeller of a flowmeter are detected at two points to obtain signals (a), (b), and in an input circuit 11, the forward-backward discrimination signal (c) of the signals (a), (b), and a stepping pulse signal (d) by AND are obtained. The intervals T of the stepping pulse signal (d) are time- measured 21, and a correction table 23 storing the instrumental error correction coefficients for respective flow rates and a controller 22 corresponding to the forward-backward discrimination signal (c) cause addition and subtraction in an adder-subtractor 12 by way of a gate circuit 24, and these are integrated in a reversible integrating counter at every overflow or underflow. The controller 22 generates an overflow alarm when the measurement intervals are smaller than the minimum time interval T, and at the same time, it changes over the gate circuit 24 to an externally set constant in lieu of the correction table and therefore the correct use of water meters is warned.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7405580A JPS57519A (en) | 1980-06-02 | 1980-06-02 | Electronic type flowmeter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7405580A JPS57519A (en) | 1980-06-02 | 1980-06-02 | Electronic type flowmeter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57519A true JPS57519A (en) | 1982-01-05 |
Family
ID=13536113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7405580A Pending JPS57519A (en) | 1980-06-02 | 1980-06-02 | Electronic type flowmeter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57519A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0643863A (en) * | 1993-03-30 | 1994-02-18 | Casio Comput Co Ltd | Effector |
US5747703A (en) * | 1993-12-07 | 1998-05-05 | Schlumberger Industries S.A. | Method and apparatus for monitoring variation in the current value of a rate of fluid flow through a flow meter |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5382454A (en) * | 1976-12-28 | 1978-07-20 | Tokyo Gas Co Ltd | Detecting apparatus for momentary flow rate from volume pulse signals |
-
1980
- 1980-06-02 JP JP7405580A patent/JPS57519A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5382454A (en) * | 1976-12-28 | 1978-07-20 | Tokyo Gas Co Ltd | Detecting apparatus for momentary flow rate from volume pulse signals |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0643863A (en) * | 1993-03-30 | 1994-02-18 | Casio Comput Co Ltd | Effector |
US5747703A (en) * | 1993-12-07 | 1998-05-05 | Schlumberger Industries S.A. | Method and apparatus for monitoring variation in the current value of a rate of fluid flow through a flow meter |
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