• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    PCT No. PCT/NO84/00046 Sec. 371 Date Nov. 22, 1985 Sec. 102(e) Date Nov. 22, 1985 PCT Filed Oct. 29, 1984 PCT Pub. No. WO85/02016 PCT Pub. Date May 9, 1985.The apparatus has two plate electrodes surrounded by a third electrode. The third electrode is maintained at an electric potential equal to half of the electric potential between the two plate electrodes. The fluid is passed between the two plate electrodes and the changes in capacitance between the two plate electrodes is measured. From this measurement the fraction of gas in the fluid is determined.
    公开号:SU1574185A3
    申请号:SU853916765
    申请日:1985-07-01
    公开日:1990-06-23
    发明作者:Торн Ричард
    申请人:Ден Норске Статс Олеселескап А.С. (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to a measurement technique and can be used to monitor oil in pipelines.
    The aim of the invention is to improve the measurement accuracy.
    FIG. a diagram of the device j in figure 2 is shown - the distribution of the floor in the control object.
    The device contains parallel electrodes 1 and 2 of a flat capacitive sensor, a cylindrical electrode 3, a pipeline 4, an operational amplifier 5 with capacitive feedback, a buffer amplifier 6, a voltage divider 7 and 8 for two, made for example of two series-connected identical resistors as well as a variable voltage source 9.
    The device works as follows
    A two component stream, such as a mixture of oil and gas, which is the object of control, passes between parallel plate electrodes I and 2 and causes a change in the capacitance of the capacitor formed by electrodes 1 and 2 as the gas content in the stream changes. including amplifier 5 with capacitive feedback.
    with
    about
    about
    If the feedback capacitance of amplifier 5 is fixed and maintains with a constant, the amplitude V4 of the output signal of amplifier 5 is directly proportional to the capacitance value of the main sensor, i.e., e, the output voltage of the amplifier is a measure of the gas content in a controlled environment.
    In order to maintain a uniform electric field inside the investigated volume of the main sensor, At electrode 3. it is necessary to maintain a potential equivalent to the potential that occurs in the middle between electrodes 1 and 2. This is achieved by connecting the electrode 3 the voltage divider 7 and 8 through the buffer amplifier 6- "
    With a high uniformity of the floor in the volume of the object of control (Fig. 2), an increase in the accuracy of the measure
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    1 "A device for measuring the relative gas content in a two-component fluid stream, comprising a pipeline for transporting a test object, a plane-parallel capacitive sensor, a measuring circuit with an alternating voltage source, a cylindrical electrode, the pipeline being placed inside a plane-parallel capacitive sensor that is located inside a cylindrical electrode and connected to the measuring circuit, so that, in order to improve the measurement accuracy, it It contains a buffer amplifier and a voltage divider between two connected between the power supply of the measuring circuit and the common bus, the midpoint of which is connected via a buffer amplifier with the cylindrical electrode of the sensor.
    2, The device according to claim 1, 1, and 19, which means that the measuring circuit further comprises an operational amplifier with capacitive feedback, with one electrode of the capacitive sensor connected to an alternating voltage source and the other to the input of the operating force of the bodies.
    FIG. g
    类似技术:
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    同族专利:
    公开号 | 公开日
    BR8405616A|1985-09-10|
    IT1207489B|1989-05-25|
    FI852602L|1985-07-01|
    FI852602A0|1985-07-01|
    DK153587B|1988-07-25|
    NO153621B|1986-01-13|
    DK292085A|1985-06-27|
    EP0160673A1|1985-11-13|
    DK292085D0|1985-06-27|
    IT8423442D0|1984-11-02|
    NO833983L|1985-05-03|
    EP0160673B1|1989-01-11|
    NO153621C|1986-04-23|
    DK153587C|1988-12-19|
    US4713603A|1987-12-15|
    CA1236992A|1988-05-24|
    JPS61500985A|1986-05-15|
    WO1985002016A1|1985-05-09|
    DE3476122D1|1989-02-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3254333A|1963-01-14|1966-05-31|Baumoel Joseph|Liquid condition and level detector|
    FR1359960A|1963-04-05|1964-04-30|Method and apparatus for non-contact thickness measurement|
    FR1366936A|1963-06-05|1964-07-17|Endress & Hauser G M B H & Co|Device for capacitive measurement of the filling level of a tank|
    US3339137A|1964-07-03|1967-08-29|Weyerhaeuser Co|Moisture determining apparatus having adjacent electrode pairs driven outof-phase|
    US3375441A|1965-06-01|1968-03-26|Moisture Register Company|Roller electrode probe for electrical moisture-testing instrument having a rotatable outer cylinder concentric with fired inner cylinder electrode|
    US3450988A|1966-12-21|1969-06-17|Kingsbury Technology Inc|Capacitor test cell apparatus including error-reducing coupling cables|
    US3706980A|1970-04-27|1972-12-19|Drexelbrook Controls|Rf system for measuring the level of materials|
    DE2160526A1|1971-01-28|1972-08-17|Usines Balteau Sa|Device for measuring the gas content of oil|
    PL77873B1|1973-07-09|1975-04-30|
    US4444040A|1981-07-27|1984-04-24|Hitachi, Ltd.|Method and apparatus for detecting gas components in oil in oil-filled device|
    JPS5885314A|1981-11-17|1983-05-21|Nissan Motor Co Ltd|Deterioration detector of engine oil|
    SU1030715A1|1981-12-17|1983-07-23|Предприятие П/Я Г-4567|Capacitive flow-through type pickup|
    SU1140028A1|1983-02-08|1985-02-15|Пензенский Политехнический Институт|Capacitive contact-type pickup parameter converter|DE3225554A1|1982-07-08|1984-01-12|Robert Bosch Gmbh, 7000 Stuttgart|Measuring device for fluid jets|
    US4774680B1|1986-09-19|1993-10-12|Agar Corporation Ltd.|Method and apparatus for net oil measurement|
    GB8721858D0|1987-09-17|1987-10-21|Schlumberger Ltd|Measurement apparatus|
    US4899101A|1988-01-21|1990-02-06|The United States Of America As Represented By The United States Department Of Energy|Online capacitive densitometer|
    GB8820687D0|1988-09-01|1988-10-05|Chr Michelsen Inst|Three component ratio measuring instrument|
    GB2227841B|1988-12-03|1993-05-12|Schlumberger Ltd|Impedance cross correlation logging tool|
    GB2267571B|1992-05-27|1995-09-06|Univ Southampton|Gas detector|
    DE4442711A1|1994-12-01|1996-06-05|Claas Ohg|Capacitive measuring device|
    US5646539A|1995-08-31|1997-07-08|Caterpillar Inc.|Multi-purpose capacitive sensor|
    US5672831A|1995-08-31|1997-09-30|Caterpillar Inc.|Capacitive flow sensor|
    US5670721A|1995-08-31|1997-09-23|Caterpillar Inc.|Capacitive pressure sensor with heated electrodes|
    US5631568A|1995-08-31|1997-05-20|Caterpillar Inc.|Capacitive oil life sensor|
    US5668309A|1995-08-31|1997-09-16|Caterpillar Inc.|Capacitive particle sensor|
    US5861755A|1995-11-06|1999-01-19|The United States Of America As Represented By The Adminstrator Of National Aeronautics And Space Administration|Two-phase quality/flow meter|
    DE19632529A1|1996-08-13|1998-02-19|Peter Dipl Ing Tillack|Measurement of gas component in multi-phase fluid|
    JP3767075B2|1997-03-24|2006-04-19|ソニー株式会社|Film position detection apparatus, film position detection method, and video film projection apparatus|
    DE19806477C1|1998-02-17|1999-08-26|Deutsch Zentr Luft & Raumfahrt|Method and measuring device for determining the volumetric gas content|
    DE19956958A1|1999-11-16|2001-06-13|Vogel Willi Ag|Method and device for monitoring the oil flow of a device for oil + air lubrication of components|
    ITMI20071019A1|2007-05-21|2008-11-22|Siviero Enrico|METHOD AND EQUIPMENT FOR THE MEASUREMENT AND CONTROL OF THE QUANTITY OF NUCLEATION GAS EXPOSED IN A MULTIFASE FLUID|
    CN101413911B|2008-11-27|2012-05-09|上海交通大学|Method and device for measuring two-phase flow parameter based on double-end capacitance probe|
    CN106247917B|2016-07-12|2018-10-02|清华大学|Horizontal flow pattern of gas-liquid two-phase flow quantitatively judges method and device|
    US10697846B2|2018-05-04|2020-06-30|Ademco Inc.|Capacitive leak and flammable vapor detection system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NO833983A|NO153621C|1983-11-02|1983-11-02|APPLIANCES FOR MEASURING GAS FRACTION IN A TWO COMPONENT CURRENT USING THE MIXTURE OF WATER AND GAS.|
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