基于C-DTS的土壤含水率分布式测定方法研究

曹鼎峰; 施斌; 严珺凡; 魏广庆

doi:10.11779/CJGE201405015

基于C-DTS的土壤含水率分布式测定方法研究 English Version

1. 南京大学地球科学与工程学院,江苏南京 210046; 2. 苏州南智传感科技有限公司,江苏苏州 215123

基金项目: 国家科技支撑计划项目（2012BAK10B05）; 国家自然科学基金重点项目（41230636）; 国家重点基础研究发展计划（973计划）项目（2011CB710605）

详细信息

作者简介:
曹鼎峰(1988- ),男,甘肃会宁人,硕士研究生,主要从事岩土工程及分布式监测技术等方面的研究。E-mail: caodingfeng12@163.com。

通讯作者:
施斌

中图分类号: TU441.3
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出版历程
- 收稿日期: 2013-09-09
- 发布日期: 2014-05-20

Distributed method for measuring moisture content of soils based on C-DTS

1. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, China; 2. Suzhou NanZee Sensing Technology Co., Ltd., Suzhou 215123, China

摘要

摘要: 基于碳纤维加热光缆的分布式测温系统（简称C-DTS）,提出了一种土壤含水率分布式测定方法。该方法采用C-DTS测试系统,对埋设在土壤中的碳纤维加热光缆的温度变化进行测定,利用其升温过程中的温度特征值与含水率之间的关系进行分布式测定土壤中的含水率。定义了温度特征值T_t,通过试验证明了T_t与含水率w之间存在线性关系,相关参数可通过标定试验确定。试验结果表明：采用碳纤维光缆人为加热的方法,可有效地测定土壤含水率；而DTS技术的应用,可实现土壤含水率分布式测量；此方法的测量精度与温度特征值的选取有关。
- 土壤 /
- 含水率 /
- DTS /
- 碳纤维加热光缆 /
- 分布式监测
Abstract: Based on the carbon-fiber-heating-cable distributed temperature sensing system (C-DTS), a new distributed method for measuring the moisture content of soils is proposed. The temperature of soil-buried-cable is measured by C-DTS in this method. The moisture content of soils is determined by the relationship between the temperature characteristic value (T_t) and the moisture content. T_t is defined, and it is proved that there is a linear relationship between the moisture content and T_t. The relevant parameters can be determined by calibration experiment. The experimental results show that the moisture content of soils can be measured effectively through artificial heating carbon-fiber-cable, and the usage of DTS provides distributed measurement. The accuracy of this method is related to the section of T_t. The success of the proposed method provides a very advanced distributed approach for measuring the moisture content of soils. Further improvement and popularization are required.
- soil /
- moisture content /
- DTS /
- carbon fiber heating optical cable /
- distributed sensing

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参考文献(15)

[1]	QI Jian-feng, SONG Xue-lin, LIU Ji-chao. A study on the effects of water content on strength parameters of landslide soil[J]. Applied Mechanics and Materials, 2012, 170-173: 785-788.
[2]	NIAN Ting-kai, FENG Zhong-kai, YU Peng-cheng, et al. Shear test on mixed slide-zone soils of landslide under different water content[J]. Advanced Materials Research, 2011, 301: 1208-1213.
[3]	WANG Cheng-liang, BAI Ming-zhou, KUANG Xing. Study on risk assessment method of water bursting disaster in railway tunnel[J]. Applied Mechanics and Materials, 2011, 90: 2408-2413.
[4]	DAILY W, RAMIREZ A, LABRECQUE D, et al. Electrical resistivity tomography of vadose water movement[J]. Water Resources Research, 1992, 28(5): 1429-1442.
[5]	FRIEDMAN S P. Soil properties influencing apparent electrical conductivity: A review[J]. Computers and Electronics in Agriculture, 2005, 46(1): 45-70.
[6]	DALTON F N, HERKELRATH W N, RAWLINS D S, et al. Time-domain reflectometry: Simultaneous measurement of soil water content and electrical conductivity with a single probe[J]. Science, 1984, 224(4652): 989-990.
[7]	WOJCIECH S, ANDRZEJ W, OLGA A, Calibration of a TDR probe for low soil water content measurements[J]. Sensors and Actuators, 2008, 147(2): 544-552.
[8]	SKIERUCHA W. Accuracy of soil moisture measurement by TDR technique[J]. International Agrophsics, 2000, 14: 417-426.
[9]	HU Chuan-long, WANG Jing-feng, ZHANG Zai-xuan, et al. Research on distributed temperature sensor(DTS) applied in underground tunnel[C]// 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Application, 2011, 8199(16): 1-6.
[10]	ZHANG Xi, FAN Tian-nan. The research of distribute temperature monitoring system early warning fire in coal belt conveyor[J]. Advanced Materials Research, 2012, 548: 890-892.
[11]	GROSSWIG S, HURTIG E, KÜHN K, et al. Distributed fiber-optic temperature sensing technique(DTS) for surveying underground gas storage facilities[J]. Oil Gas European Magazine, 2002, 27(4): 31-34.
[12]	COTÉ A, CARRIER B, LEDUC J, et al. Water leakage detection using optical fiber at the peribonka dam[J]. Geotechnical Special Publication, 2007, 175(59): 1-12.
[13]	王晓东. 传热学[M]. 大连：大连理工大学出版社,2008 (WANG Xiao-dong. Transferts thermiques[M]. Dalian: Dalian University of Technology Press, 2008 (in Chinese))
[14]	林玉兰, 陈永泰. 拉曼散射分布式光纤温度传感器的设计[J]. 光电子技术与信息, 2002, 15(2): 33-36. (LIN YU-lan, CHEN Yong-tai. Design of a raman scattering distributed optical fiber temperature sensor[J]. Optoelectronic Technology & Information, 2002, 15(2): 33-36. (in Chinese))
[15]	张丹. 基于BOTDR的分布式光纤传感技术及其在工程健康监测中的应用研究[D]. 南京: 南京大学, 2004. (ZHANG Dan. BOTDR-based distributed optical fiber sensing and its application into engineering health monitoring[D]. Nanjing: Nanjing University, 2004. (in Chinese))