JPS5621013A - Method of measuring flow velocity or rate - Google Patents
Method of measuring flow velocity or rateInfo
- Publication number
- JPS5621013A JPS5621013A JP9789379A JP9789379A JPS5621013A JP S5621013 A JPS5621013 A JP S5621013A JP 9789379 A JP9789379 A JP 9789379A JP 9789379 A JP9789379 A JP 9789379A JP S5621013 A JPS5621013 A JP S5621013A
- Authority
- JP
- Japan
- Prior art keywords
- flow velocity
- passage
- water level
- cross
- mean flow
- 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 measure the velocity or rate of flow independently of the roughness of the wall of a water passage and its size, by setting such a partial flow detection position that a formula for converting the partial flow velocity into the mean flow velocity is a function of only a diameter depth ratio which is defined by only the shape of the cross section of the water passage.
CONSTITUTION: Ultrasonic flow velocity detectors 2, 3 are provided on the inside wall of a circular water passage 1 so that the detectors faces each other. The mean flow velocity between points P, Q is detected and applied to a flow velocity converter 4. An ultrasonic water level detector 5 is installed over the water passage to detect the water level in the passage. The detected water level is applied to a water level converter 6. The output signals of the converters 4, 6 are transmitted to a calculator 7, which computes the mean flow velocity on the cross section of the water passage from the mean flow velocity between the points P, Q and the water level multiplies the mean flow velocity on the cross section of the passage by the cross- sectional area of the passage to produce a flow rate signal 8. The partial flow velocity detectors 2, 3 are located at such a depth that the ratio of the mean flow velocity to the partial flow velocity is a linear function of the one-sixth power of the diameter depth ratio.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9789379A JPS5621013A (en) | 1979-07-31 | 1979-07-31 | Method of measuring flow velocity or rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9789379A JPS5621013A (en) | 1979-07-31 | 1979-07-31 | Method of measuring flow velocity or rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5621013A true JPS5621013A (en) | 1981-02-27 |
Family
ID=14204424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9789379A Pending JPS5621013A (en) | 1979-07-31 | 1979-07-31 | Method of measuring flow velocity or rate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5621013A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100477090B1 (en) * | 2002-03-12 | 2005-03-18 | (주)우진후로텍 | Flow meter for open channel and thereof flow measuring method by using principle of electromagnetic induction |
-
1979
- 1979-07-31 JP JP9789379A patent/JPS5621013A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100477090B1 (en) * | 2002-03-12 | 2005-03-18 | (주)우진후로텍 | Flow meter for open channel and thereof flow measuring method by using principle of electromagnetic induction |
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