期刊
MEASUREMENT
卷 98, 期 -, 页码 321-324出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2015.09.018
关键词
Fiber optics; Distributed temperature sensing; Optical backscattered reflectometry; Groundwater flow; Internal erosion; Piping
资金
- CARIPARO Foundation (Cassa di Risparmio di Padova e Rovigo)
A distributed temperature optical fiber sensor system with a sub-centiineter spatial resolution has been incorporated in a sand-box model at the aim of investigating the variations induced by internal erosion on the temperature distribution in a dike. In particular, the laboratory investigation aims at studying the spatial distribution of the temperature variations occurring in the surroundings of an erosion channel (pipe). The calibration of the setup consisted in measuring the thermal response of an intact sample to a horizontal flow, with the inflowing water maintained at a constant temperature higher than the room temperature. No erosion occurred in the calibration test. The results of the calibration are presented in this paper and show that with the sensing system adopted temperature mapping in a soil sample can be obtained with such a richness of detail which is not comparable with that achieved adopting a system of pointwise sensors. (C) 2015 Elsevier Ltd. All rights reserved.
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