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Title |
Development of Fine Dust Measurement Method based on Ultrasonic Scattering
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Authors |
최하진(Hajin Choi) ; 우욱용(Ukyong Woo) ; 홍진영(Jinyoung Hong) |
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DOI |
https://doi.org/10.11112/jksmi.2019.23.7.40 |
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Keywords |
미세먼지; 비산먼지; 유지관리; 초음파; 산란; 측정법; 수치해석 fine dust; particulate matter; structural maintenance; ultrasonic; scattering; sensing; numerical simulation |
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Abstract |
New concept of fine dust measurement method is suggested based on ultrasonic scattering. These days, fine dust has been social problem in Korea, and many researches has been conducted including the area structural maintenance. Conventional measurement system such as optical scattering and semiconductor has a limit from environmental factors like relative humidity. However, ultrasound is based on mechanical waves, which perturb mechanical properties of medium such as density and elastic constants. Using the advantage, the algorithm for fine dust measurement is derived and evaluated using 2-D finite difference method. The numerical analysis simulates ultrasonic wave propagation inside multiple scattering medium like fine dust in air. Signal processing scheme is also suggested and the results show the error rate of the algorithm is around 8%. It is shown that cross-section of fine dust is a key parameter to improve the accuracy of algorithm.
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