Laser & Optoelectronics Progress, Volume. 48, Issue 2, 23001(2011)
Soil Moisture Measurement Based on Terahertz Transmission Spectrum
Liquid water is a kind of polar liquid, and has a strong absorption on the terahertz wave. The tiny change of soil moisture has a great influence on the transmitted terahertz wave. Accordingly, a method is proposed to measure the soil moisture based on time domain terahertz transmission spectrum. Soil terahertz parameters concept is proposed and the equations to calculate soil moisture are derived. Abundant results of soil samples are obtained with terahertz time domain spectroscopy, and the preliminary soil terahertz parameter value is given. By comparison with oven drying method, it demonstrates that this method is accurate and available.
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Xia Jiaxin, Fan Chengfa, Wang Kejia, Liu Jinsong. Soil Moisture Measurement Based on Terahertz Transmission Spectrum[J]. Laser & Optoelectronics Progress, 2011, 48(2): 23001
Category: Spectroscopy
Received: Oct. 13, 2010
Accepted: --
Published Online: Jan. 12, 2011
The Author Email: Jiaxin Xia (xiajiaxin@126.com)