基于频率步进原理的TDR研制及在土体含水率测试中的应用

陈仁朋; 陈卓; 陆明; 刘惠斌; 王晨光; 卢玉

doi:10.11779/CJGE201907002

基于频率步进原理的TDR研制及在土体含水率测试中的应用 English Version

陈仁朋^1,2,3,
陈卓^1,2,3,
陆明⁴,
刘惠斌⁴,
王晨光⁴,
卢玉⁴

1. 湖南大学建筑安全与节能教育部重点实验室,湖南长沙 410082;
2. 湖南大学国家级建筑安全与环境国际联合研究中心,湖南长沙 410082;
3. 湖南大学土木工程学院,湖南长沙 410082;
4. 天津特利普尔科技有限公司,天津 300384

基金项目: 国家重点研发计划项目（2016YFC0800200）; 国家自然科学基金项目（51608188）; 长沙市科技计划项目(kq1703051)

详细信息

作者简介:
陈仁朋(1972— ),男,浙江衢州人,教授,博士生导师,主要从事土的基本特性及本构模型、交通岩土、盾构隧道等方面的教学与科研工作。E-mail: chenrp@hnu.edu.cn。

中图分类号: TU415
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出版历程
- 收稿日期: 2018-07-18
- 发布日期: 2019-07-24

Development of TDR based on stepped-frequency principle and its application in measurement of volumetric water content of soils

1. MOE Key Laboratory of Building Safety and Energy Efficiency, Hunan University, Changsha 410082, China;
2. National Joint Research Center for Building Safety and Environment, Hunan University, Changsha 410082, China;
3. College of Civil Engineering, Hunan University, Changsha 410082, China;
4. Tianjin Telepro Science Technology Co., Ltd., Tianjin 300384, China

摘要

摘要: 基于时域无载频脉冲原理的时域反射法（TDR）能够快速准确测试土体含水率,在岩土工程领域有广泛用途。但是目前TDR测定仪器均为进口,国外对中国实行技术封锁。介绍了一套基于频率步进原理的TDR,利用该原理信号源输出的频率分量能够精确获知,接收信号中的噪声有效被抑制;研制了探针转换器,避免在常态测试区域出现测试盲点,提高测试范围和精度。最后通过水、空气及土体3种介质中含水率测试对比试验,验证了新型TDR测试设备的有效性。
- 时域反射法 /
- 频率步进原理 /
- 体积含水率
Abstract: The time-domain reflection method (TDR) based on the time-domain carrier-free pulse principle can test volumetric water content of soils timely and accurately and is widely applied in geotechnical engineering. But all the TDR testing instruments are imported at present, and some foreign countries implement blockade on the techniques. A set of TDR system based on the principle of stepped-frequency is recommended. The output frequency component of the signal source can be accurately known and the noise in the received signal can be effectively restrained. A reasonable probe converter is developed to avoid blind spots in normal testing area and to improve testing range and accuracy. Finally, the effectiveness of the new TDR testing equipment is verified by comparing the volumetric water contents of water, air and soil.
- time-domain reflection method /
- stepped-frequency principle /
- volumetric water content

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参考文献(24)

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