KR970022231A - 전자유량계 - Google Patents
전자유량계 Download PDFInfo
- Publication number
- KR970022231A KR970022231A KR1019960047364A KR19960047364A KR970022231A KR 970022231 A KR970022231 A KR 970022231A KR 1019960047364 A KR1019960047364 A KR 1019960047364A KR 19960047364 A KR19960047364 A KR 19960047364A KR 970022231 A KR970022231 A KR 970022231A
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- KR
- South Korea
- Prior art keywords
- flow rate
- fluid
- magnetic field
- measuring tube
- potential
- 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.)
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Classifications
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- 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
- G01F1/588—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 combined constructions of electrodes, coils or magnetic circuits, accessories therefor
-
- 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
-
- 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
- G01F1/002—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow wherein the flow is in an open channel
-
- 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
- G01F1/584—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 constructions of electrodes, accessories therefor
-
- 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
- G01F1/586—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 constructions of coils, magnetic circuits, accessories therefor
-
- 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)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims (9)
- 측정관 중을 흐르는 유체의 유량을 측정하는 전자유량계에 있어서, 상기 유체의 유체수위에 의존하지 않고 상기 유체의 유량을 산출하는 유량산출수단(2, 3, 4, 13, 6, 14)과, 상기 유량산술수단에 의해서 산출된 유체의 유량을 표시하는 표시수단(14)을 구비한 것을 특징으로 한다.
- 제1항에 있어서, 상기 유량산출수단은, 상기 측정관의 축방향으로 직교되고, 상기 유체의 내부에 생기는 기전력이 상기 유체의 유체수위에 영향받지 않는 자장을 상기 측정관의 내부에 발생하는 자장발생수단(3)과, 상기 자장발생수단에 의해서 발생한 자장에 의해서, 상기 유체내에 생기는 전위로부터 상기 측정관의 내부를 흐르는 유체의 유량을 산출하고, 이 산출한 유량을 상기 표시수단에 출력하는 유량출력수단(2, 4, 13, 6, 14)을 구비한 것을 특징으로 하는 전자유량계.
- 제2항에 있어서, 상기 자장발생수단은, 상기 측정관의 외주에 설치된 한쌍의 여자코일(3)과, 상기 각 여자코일에 자장을 발생시키기 위한 여자전류를 공급하는 공급수단(4)을 구비하고, 상기 각 여자코일은, 상기 각 여자코일의 중심을 연결하는 선이 상기 측정관의 수평방향의 중심선 보다도 위쪽에 배치되어 있는 것을 특징으로 하는 전자유량계.
- 제2항에 있어서, 상기 자장발생수단은, 상기 측정관의 축방향으로 직교하는 자장을 상기 측정관의 내부에 발생하는 제1자장발생수단(3)과, 상기 측정관 중을 흐르는 유체의 유체수위를 검출하는 검출수단(12, 14)과, 상기 검출수단에 의하여 검출된 유체수위에 의해서 상기 유체의 내부에 생기는 기전력이 상기 유제의 유체수위에 영향받지 않는 자장을 발생시키기 위한 구동전류를 출력하는 구동전류출력수단(14, 22)과, 상기 구동전류출력수단에 의해서 출력된 구동전류에 의해서, 상기 측정관의 축방향으로 직교되고, 상기 유체의 내부에 생기는 기전력이 상기 유체의 유체수위에 영향받지 않도록 상기 측정관의 내부의 자장을 보정하는 자장을 발생하는 제2자장발생수단(21)을 구비할 것을 특징으로 하는 전자유량계.
- 제1항에 있어서, 상기 유량산출수단은, 상기 측정관의 축방향으로 직교되는 자장을 상기 측정관의 내부에 발생하는 자장발생수단(3)과, 상기 자장발생수단에 의해서 발생한 자장에 의해서 상기 유체내에 생기는 전위 및 상기 측정관 중을 흐르는 유체수위에 의해서, 상기 측정관의 내부를 흐르는 유체의 유량을 산출하고, 이 산출한 유량을 상기 표시수단에 출력하는 유량출력수단(2, 13, 6, 12, 14)을 구비한 것을 특징으로 하는 전자유량계.
- 제5항에 있어서 상기 유량출력수단은, 상기 측정관 중을 흐르는 유체의 유제수위를 검출하는 검출수단(12, 14)과 상기 자장발생수단에 의해서 발생한 자장에 의해서 상기 유체내에 생기는 전위에 의해서, 상기 측정관의 내부를 흐르는 유체의 유량을 산출하는 산출수단(2, 13, 6, 14)과, 상기 검출수단에 의하여 검출한 유체수위에 의해서, 상기 산출수단에 의하여 산출한 유체의 유량을 보정하고, 이 보정된 유량을 상기 표시수단에 출력하는 보정유량출력수단(14)을 구비한 것을 특징으로 하는 전자유량계.
- 제5항에 있어서, 상기 유량계출력수단은, 상기 측정관 중을 흐르는 유체의 유체수위를 검출하는 유체수위 검출 수단(12)과, 상기 측정관의 하부의 축방향의 위치에 발생하는 기전력으로부터 상기 측정관 중을 흐르는 유체의 유량에 비례하는 신호를 각각 출력하는 복수의 유량검출수단(2a∼2c, 13a∼13c)과, 상기 유체수위검출수단에 의하여 검출한 유체수위에 의해서, 상기 각 유량검출수단으로루터 출력되는 유량에 비례되는 신호중, 상기 유체수위에 대응하는 상기 유량검출수단으로부터 출력되는 유량에 비례하는 신호를 선택하여 출력하는 유량선택수단(31)과, 상기 유량선택수단으로부터 출력되는 신호에 의해서 상기 유관 중을 흐르는 유체의 유량을 산출하고, 산출한 유체의 유량을 상기 유체수위검출수단에 의하여 검출되는 유체수위에 의해서 보정하고, 이 보정한 유량을 상기 표시수단에 출력하는 보정유량출력수단(14)을 구비한 것을 특징으로 하는 전자유량계.
- 제5항에 있어서, 상기 유량출력수단은, 상기 측정관 중을 흐르는 유체의 유체수위를 상기 측정관의 복수의 위치에서의 전위를 각각 검출하는 복수의 전위검출수단(42a∼42c)과, 상기 전위검출수단으로 검출한 전위로부터 상기 측정관을 흐르는 유체수위를 검출하는 수위검출수단(12, 14)과, 상기 수위검출수단으로 검출한 수위에 의해서, 상기 복수의 전위검출수단으로부터 출력되는 전위중의 하나를 선택하여 출력하는 선택수단(41)과, 상기 측정관의 하부의 전위를 검출하는 하부전위검출수단(2)과, 상기 하부전위검출수단에 의하여 검출한 전위와 상기 선택수단으로부터 출력되는 전위에 의해서 상기 측정관중을 흐르는 유체의 유량을 산출하고, 이 산출한 유체의 유량을 상기 유체수위검출수단에 의해서 검출한 유체수위에 의해서 보정하고, 이 보정한 유량을 상기 표시수단에 출력하는 보정유량출력수단(14)을 구비한 것을 특징으로 하는 전자유량계.
- 제1항에 있어서, 상기 측정관의 단부에는 어스된 어스링(5)이 설치되고, 상기 유량산출수단은, 상기 측정관의 축방향으로 직교되는 자장을 상기 측정관의 내부에 발생하는 자장발생수단(3)과, 상기 자장발생수단에 의해서 발생한 자장에 의해서 상기 측정관의 하부이고, 또한 상기 어스링에서 상기 측정관의 내경보다도 떨어진 위치에서의 전위와 상기 어스링의 어스전위로부터 상기 측정관 중을 흐르는 유체의 유량을 산출하고, 산출한 유량을 상기 표시수단에 출력하는 유량출력수단(13, 6, 14)을 구비한 것을 특징으로 하는 전자유량계.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27902395A JP3263296B2 (ja) | 1995-10-26 | 1995-10-26 | 電磁流量計 |
JP95-279023 | 1995-10-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR970022231A true KR970022231A (ko) | 1997-05-28 |
KR100216646B1 KR100216646B1 (ko) | 1999-09-01 |
Family
ID=17605324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019960047364A Expired - Lifetime KR100216646B1 (ko) | 1995-10-26 | 1996-10-22 | 전자유량계 |
Country Status (6)
Country | Link |
---|---|
US (1) | US5880376A (ko) |
EP (1) | EP0770857A3 (ko) |
JP (1) | JP3263296B2 (ko) |
KR (1) | KR100216646B1 (ko) |
CN (1) | CN1165748C (ko) |
CA (1) | CA2188739C (ko) |
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-
1995
- 1995-10-26 JP JP27902395A patent/JP3263296B2/ja not_active Expired - Lifetime
-
1996
- 1996-10-22 KR KR1019960047364A patent/KR100216646B1/ko not_active Expired - Lifetime
- 1996-10-23 EP EP96307688A patent/EP0770857A3/en not_active Withdrawn
- 1996-10-24 CA CA002188739A patent/CA2188739C/en not_active Expired - Lifetime
- 1996-10-26 CN CNB961192860A patent/CN1165748C/zh not_active Expired - Lifetime
-
1997
- 1997-09-29 US US08/937,595 patent/US5880376A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2188739C (en) | 2000-04-18 |
KR100216646B1 (ko) | 1999-09-01 |
CA2188739A1 (en) | 1997-04-27 |
EP0770857A2 (en) | 1997-05-02 |
US5880376A (en) | 1999-03-09 |
JPH09119857A (ja) | 1997-05-06 |
CN1165748C (zh) | 2004-09-08 |
JP3263296B2 (ja) | 2002-03-04 |
CN1158984A (zh) | 1997-09-10 |
EP0770857A3 (en) | 1997-10-08 |
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