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    • 4. 发明申请
    • DEVICE FOR MEASURING MOISTURE IN OVERLAYS (LIKE HAIR) OF A MICROSTRIP DIRECTIONAL COUPLER
    • 用于测量MICROSTRIP方向耦合器的覆盖(如发型)中的水分的装置
    • WO2008005346A3
    • 2008-04-03
    • PCT/US2007015157
    • 2007-06-29
    • PROCTER & GAMBLESHERMAN FAIZ FEISALGARTSTEIN VLADIMIRMOORE DAVID BURTON
    • SHERMAN FAIZ FEISALGARTSTEIN VLADIMIRMOORE DAVID BURTON
    • G01N22/04
    • G01N22/04
    • A sensor for measuring moisture content of a sample like hair, comprising: a micorstrip line; a directional coupler having a pair of generally parallel first (3) and second (4) strips defining a coupling gap therebetween; and a high frequency signal generator electrically coupled to said first strip (3) and operable to couple power to said second strip (4) with the sample placed as an overlay across said coupling gap to thereby generate a coupled power signal in said second strip having an amplitude related to moisture content of the sample. The coupled power signal from strip (4) is phase (13) shifted by the microstrip line and coupled to one port of a mimixer (12). The forward power signal from strip (3) is coupled to the other part of mixer (12).
    • 一种用于测量样品样品的水分含量的传感器,包括:微带线; 定向耦合器,具有一对大致平行的第一(3)和第二(4)条,其限定了它们之间的耦合间隙; 以及高频信号发生器,电耦合到所述第一条带(3)并且可操作以将所述样本与所述第二条带(4)耦合,所述样本被放置成跨越所述耦合间隙的覆盖层,从而在所述第二条带中产生耦合的功率信号, 与样品的水分含量有关的振幅。 来自条带(4)的耦合功率信号是由微带线移位的相位(13),并耦合到模拟器(12)的一个端口。 来自条带(3)的正向功率信号耦合到混合器(12)的另一部分。