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Smart Structures and Systems Volume 6, Number 9, December 2010 , pages 1007-1023 DOI: https://doi.org/10.12989/sss.2010.6.9.1007 |
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Design and evaluation of a distributed TDR moisture sensor |
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Bin Zhang, Xinbao Yu and Xiong Yu
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| Abstract | ||
| This paper describes the development and evaluation of an innovative TDR distributed moisture sensor. This sensor features advantages of being responsive to the spatial variations of the soil moisture content. The geometry design of the sensor makes it rugged for field installation. Good linear calibration is obtained between the sensor measured dielectric constant and soil physical properties. Simulations by the finite element method (FEM) are conducted to assist the design of this sensor and to determine the effective sampling range. Compared with conventional types of moisture sensor, which only makes point measurement, this sensor possesses distributed moisture sensing capability. This new sensor is not only easy to install, but also measures moisture distribution with much lower cost. This new sensor holds promise to significantly improve the current field instruments. It will be a useful tool to help study the influence of a variety of moisture-related phenomena on infrastructure performance. | ||
| Key Words | ||
| TDR; strip sensor; moisture distribution; distributed; FEM; field instrument; sensor; infrastructure. | ||
| Address | ||
| Bin Zhang, Xinbao Yu and Xiong Yu: Department of Civil Engineering, Case Western Reserve University, 10900 Euclid Avenue, Bingham 203B, Cleveland, OH 44106-7201, USA | ||