Aerosol Size Distribution Measurement Using Multi-Channel Electrical Mobility Sensor

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Aerosol particles can be classified according to their electrical mobility. A multi-channel detector has been developed to classify electrically charged airborne particles under the influence of an electric field. The detector is capable of measuring the electrical mobility of particles in the sub-micrometer size range. It is compactly designed as an assembly of two concentrically-aligned cylindrical short electrodes with a fixed clearance. Sheath air and aerosol flows enter from one end, pass through the annulus and exit the other end. An electric field is applied between the inner and outer electrodes. Particles with a given electrical mobility are collected on a designated electrometer ring where electrical signals are measured to obtain size distributions. In this study, a mathematical model was developed to optimize the locations of particle detection sensors and the calculations of particle trajectories were performed for various particle sizes. A prototype detector constructed in the present work gave the particle sizes which are in good agreement with those obtained by a scanning electron microscope. Signal current from the detector was also analyzed to give number concentration of particles. Experimental results agreed well with the theoretical predictions. The proposed model was proven to be useful in designing the detector and the prototype detector showed promising results for aerosol size measurement.

収録刊行物

  • エアロゾル研究 = Journal of aerosol research  

    エアロゾル研究 = Journal of aerosol research 21(4), 329-340, 2006-12-20 

    日本エアロゾル学会

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各種コード

  • NII論文ID(NAID)
    10018792383
  • NII書誌ID(NCID)
    AN10041511
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09122834
  • NDL 記事登録ID
    8619299
  • NDL 雑誌分類
    ZP5(科学技術--化学・化学工業--化学工学)
  • NDL 請求記号
    Z17-1062
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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