@article{ref1,
title="Field measurements and numerical simulations of temperature and moisture in highway engineering using a frequency domain reflectometry sensor",
journal="Sensors (Basel)",
year="2016",
author="Yao, Yong-Sheng and Zheng, Jian-Long and Chen, Zeng-Shun and Zhang, Jun-Hui and Li, Yong",
volume="16",
number="6",
pages="ePub-ePub",
abstract="This paper presents a systematic pioneering study on the use of agricultural-purpose frequency domain reflectometry (FDR) sensors to monitor temperature and moisture of a subgrade in highway extension and reconstruction engineering. The principle of agricultural-purpose FDR sensors and the process for embedding this kind of sensors for subgrade engineering purposes are introduced. Based on field measured weather data, a numerical analysis model for temperature and moisture content in the subgrade's soil is built. Comparisons of the temperature and moisture data obtained from numerical simulation and FDR-based measurements are conducted. The results show that: (1) the embedding method and process, data acquisition, and remote transmission presented are reasonable; (2) the temperature and moisture changes are coordinated with the atmospheric environment and they are also in close agreement with numerical calculations; (3) the change laws of both are consistent at positions where the subgrade is compacted uniformly. These results suggest that the data measured by the agricultural-purpose FDR sensors are reliable. The findings of this paper enable a new and effective real-time monitoring method for a subgrade's temperature and moisture changes, and thus broaden the application of agricultural-purpose FDR sensors.<p /> <p>Language: en</p>",
language="en",
issn="1424-8220",
doi="10.3390/s16060857",
url="http://dx.doi.org/10.3390/s16060857"
}