• Title/Summary/Keyword: 액체특성 분류

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Spectral Analysis Method for Classification of Liquid Characteristics (액체의 특성 분류를 위한 스펙트럼 분석 방법)

  • Lee, Jonggil
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.20 no.12
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    • pp.2206-2212
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    • 2016
  • It is necessary to find characteristic phenomena related with permittivity differences for classification of liquid characteristics. If these phenomena can be remotely detected and characteristics can be extracted, it will be very useful in finding flammable liquid materials and classifying substances of these liquids. Therefore, in this paper, reflection and transmitted signals were analyzed from three receiving antennas with one transmitting antenna using wideband electromagnetic wave signals. Frequency response characteristics of reflected or transmitted signals are different according to characteristics of liquid materials. However, conventional FFT methods cannot be applied due to problems of low resolution caused by data windowing distortion. To minimize these problems, eigenvector analysis method was applied for high resolution spectrum estimation of received signals. From these results, it can be shown that classification of many kinds of liquids are possible using peak frequencies and corresponding peak power values of spectrum estimates obtained from various liquid materials.