• 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:
    Anordnung zur Messung der Feuchte in einer wasserhaltigen Substanz mit Mikrowellen umfaßt eine Sendeeinrichtung, bestehend aus einer Signalquelle und einer mit ihr verbundenen Sendeantenne, eine im Strahlungsfeld der Sendeantenne angeordnete Schicht der wasserhaltigen Substanz, eine Empfangsantenne, die die durch die Substanz tretende Welle empfängt, und eine mit der Empfangsantenne verbundene Auswerteeinrichtung. Diese Anordnung ermöglicht auch bei hohen Feuchten, d.h. stark wasserhaltigen Substanzen, eine einfache, störunanfällige und genaue Messung dadurch, daß die Sendeantenne eine wenigstens nahezu ebene elektromagnetische Welle in die Substanz einstrahlt, daß als Empfangsantenne mindestens eine Meßsonde vorgesehen ist und daß in der Auswerteeinrichtung die Phase der durch die Substanz tretenden Welle bestimmt wird.
    公开号:SU1291032A3
    申请号:SU823527656
    申请日:1982-12-17
    公开日:1987-02-15
    发明作者:Кнехель Рейнхард
    申请人:Н.В.Филипс Глоэлампенфабрикен (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a technique for measuring on microwave and can be used to measure the moisture content in aqueous solutions of a substance
    The purpose of the invention is improving the accuracy of measurements in the study of materials with a high content of moisture.
    Fig. 1 shows the structural electrical circuit of the device for measuring the moisture content of material J in Fig. 2 — the design of the receiving antenna; Fig. 3 shows a variant of the design of the receiving antenna; Fig. 1.4 shows the dependence of the phase of the signal on the distance between the transmitting and receiving antennas; 5 to 6 and 7 are variants of devices for measuring the moisture content of the material;
    A device for measuring the moisture content of a material contains a microwave generator 1, a transmitting antenna 2, a test material 3, a receiving antenna in the form of a probe 4 made in the form of a microstrip structure consisting of two dielectric plates 5, between which a strip conductor 6 is placed, an additional probe 7 in a strip conductor 8; electrically conducting layers 9, phase meter 10, rectangular waveguide 11, first and second amplifiers 12 and 13, first and second mixers 14 and 15, phase detector 16, sideband generator 17, intermediate frequency generator 18, control voltage generator 19 , delay line 20, tacho generator 21.
    A device for measuring the moisture content of the material works as follows.
    Microwave oscillator 1, which can be made frequency-modulated, generates a high frequency signal. Transmitting antenna 2 emits an electromagnetic wave, the direction of propagation of which coincides with the direction X in the test material. By comparing the wave received by the receiving antenna in the form of a probe 4, for example, with a reference signal from the microwave generator 1 in the phase meter 10, a phase CU) is obtained (or attenuation d) the received wave or the dependence of their change (u4, uot) probe 4 in the direction X - LH.
    five
    0
    five
    Since it is difficult to use one (movable) probe 4, an additional probe 7 is used. In Fig. 3, the strip conductors 6 and 8, running parallel to the X direction, are installed between two dielectric plates 5, the ends of the strip conductors 6 and 8 are perpendicular X direction, i.e. they are mounted in the form of a dipole parallel to the power lines of the electric field E of the wave emitted through the material under study 3. The outer surfaces of the dielectric plates 5 are covered with electrically conductive layers 9, which form a screen for the strip conductors 6 and 8. The screen leaves only the curved ends of the strip conductors 6 and 8.
    The distance LH is less than the wavelength in pure water, i.e. less than the wavelength in the test material 3.
    Phase meter 10 is connected to probes 4 and 7 and, as the moisture content of the material under study 3, determines the phase difference between the voltages taken from probes 4 and 7.
    In this device, the electromagnetic wave is emitted into a significant part of the aqueous substance to be measured, and does not depend on its non-heterogeneity.
    权利要求:
    Claims (4)
    [1]
    1. A device for measuring the moisture content of a material, comprising a microwave generator, to the output of which a transmitting antenna is connected to irradiate the material under investigation with a flat electromagnetic wave, and a receiving antenna connected to a phase meter, characterized in that
    in order to increase accuracy in the study of materials with a high moisture content, the receiving antenna is made in the form of a probe, which is placed in the material under study.
    [2]
    2. The device according to Claim 1, is made in the fact that the probe is made in the form of a microstrip structure consisting of two dielectric plates, between which a strip conductor is placed, while the outer surfaces of the dielectric plates are partially covered with an electrically conductive layer .
    0
    0
    five
    0
    3
    [3]
    3. The device according to paragraphs. 1 and 2, characterized in that the microwave oscillator is frequency-modulated.
    [4]
    4. Device on PP. 1-3, characterized in that
    The additional probe, identical to the probe, is shifted relative to it in the direction in the transmitting antenna, while the output of the additional electrode is connected to the reference input of the phase meter.
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    Compiled P. Kuznetsova Editor V. Kovtun Tehred.Hodanich Corrector. Obruchar
    Order 7920/60 Circulation 777. Subscription VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, st. Project, 4
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    同族专利:
    公开号 | 公开日
    EP0082560B1|1987-03-18|
    DE3275751D1|1987-04-23|
    FI75228C|1988-05-09|
    FI824309A0|1982-12-15|
    FI824309L|1983-06-19|
    DE3150202A1|1983-06-23|
    US4546311A|1985-10-08|
    EP0082560A3|1984-02-01|
    FI75228B|1988-01-29|
    EP0082560A2|1983-06-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2519066C2|2008-10-02|2014-06-10|Мантекс АБ|Method and device for measuring moisture content in biological material|US2798197A|1953-11-16|1957-07-02|Shell Dev|Microwave bridge|
    US4052666A|1976-04-15|1977-10-04|Nasa|Remote sensing of vegetation and soil using microwave ellipsometry|
    DE2715947A1|1977-04-09|1978-10-19|Bayer Ag|DEVICE FOR DETERMINING THE WATER CONTENT OF ISOTROPIC MATERIALS WITH THE HELP OF MICROWAVE ABSORPTION|DE3407819C1|1984-03-02|1985-06-13|B.A.T. Cigaretten-Fabriken Gmbh, 2000 Hamburg|Device for measuring the humidity of smoke materials|
    SE449139B|1984-06-27|1987-04-06|Stiftelsen Inst Mikrovags|SETTING MEASURING THE MOISTURE QUOTA IN ORGANIC MATERIALS AS A DEVICE THEREOF|
    US4767981A|1986-06-02|1988-08-30|Advanced Moisture Technology, Inc.|Moisture content detector|
    US4866371A|1986-09-15|1989-09-12|Chevron Research Company|Sample accommodator and method for the measurement of dielectric properties|
    DE3702725A1|1987-01-30|1988-08-11|Wuest Heinrich Kg|Moisture sensor for use in automatic irrigation equipment|
    GB2202947B|1987-03-09|1990-12-05|Atomic Energy Authority Uk|Microwave probe|
    FR2614419B1|1987-04-21|1989-06-16|Centre Nat Rech Scient|DEVICE FOR MEASURING, IN A PLURALITY OF POINTS, THE MICROWAVE FIELD DIFFRACTED BY AN OBJECT|
    US4767982A|1987-06-01|1988-08-30|Master Chemical Corporation|Concentration detection system|
    US4991915A|1988-08-04|1991-02-12|Imperial Chemical Industries PLC Manchester Polytechnic|Microwave moisture sensing arrangement|
    CH678229A5|1988-12-14|1991-08-15|Buehler Ag|
    FI84402C|1989-01-13|1991-11-25|Kajaani Electronics|Method and apparatus for determining moisture content of the material|
    US5315258A|1989-01-13|1994-05-24|Kajaani Elektroniikka Oy|Method and apparatus for determining the moisture content of a material|
    US5065615A|1990-03-08|1991-11-19|Hill Geoffrey E|Passive atmospheric liquid water measuring system and process|
    DE4117086C2|1991-05-25|1994-08-18|Berthold Lab Prof Dr|Method for determining the moisture content of samples by measuring the reflection or transmission of microwaves|
    US5331284A|1992-04-21|1994-07-19|Baker Hughes Incorporated|Meter and method for in situ measurement of the electromagnetic properties of various process materials using cutoff frequency characterization and analysis|
    US5455516A|1992-04-21|1995-10-03|Thermedics Inc.|Meter and method for in situ measurement of the electromagnetic properties of various process materials using cutoff frequency characterization and analysis|
    US5845529A|1995-07-18|1998-12-08|Malcam Ltd.|Device and method for determining the moisture content of material|
    EP1095243A2|1998-07-03|2001-05-02|Neles Field Controls Oy|Method and arrangement for measuring fluid|
    US6025724A|1997-11-20|2000-02-15|Malcam Ltd.|Device and method for determining the moisture content of packaged material|
    US6111415A|1998-01-09|2000-08-29|Malcam Ltd.|Device and method for determining the moisture content of a bulk material|
    US20040194541A1|2002-06-10|2004-10-07|The Procter & Gamble Company|High-Q LC circuit moisture sensor|
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    US7261000B2|2004-04-26|2007-08-28|The Procter & Gamble Company|Methods of assessing characteristics of fibrous substrates and treating fibrous substrates|
    BRPI0713515A2|2006-06-30|2012-02-07|Procter & Gamble|substrate moisture and hair health device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19813150202|DE3150202A1|1981-12-18|1981-12-18|ARRANGEMENT FOR MEASURING THE HUMIDITY|
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