粒体水分量測定用コイル電極における電界と磁界との分離について

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タイトル別名
  • リュウタイ スイブンリョウ ソクテイヨウ コイル デンキョク ニ オケル デンカイ ト ジカイ ト ノ ブンリ ニ ツイテ
  • On the Separation of Electric Field from Electro-Magnetic Field in the Coil-Electrode for Measuring the Water Content in the Granular Medium

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When the coil-electrode is used for measuring the water content in the granular medium as reported previously, the equivalent parallel resistance RL consists of both the equivalent parallel resistance Rc and Rm, where RL , Re and Rm represent equivalently the power loss in the solenoidal coil owing to the effect of electro-magnetic field, electric field and magnetic field, respectively. The instruments as shown on Fig.1 are used for measuring RL and Rc in the frequency-range from 2.0 MC. to 5.0 MC. The result of experiments is that the effect of electric field on the variation of water content in the range below 15% is conspiciously remarkable and the effect of magnetic field is gradually added to it in the range over 15% in water content. So the measurement is expected to be more sensitive when the instrument for measuring Rc is used in the range of low water content and the value of RL is measured by solenoidal coil in the range of high water content.

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