同轴电缆形变TDR监测技术的研究与实现

针对时间域反射测试技术在地质灾害防治、山体滑坡预警,以及土壤水含量分析等诸多领域的应用,使用TDR技术构建的同轴电缆形变监测算法,设计了TDR检测系统硬件电路;运用等效采样算法,实现了高速回波信号的等效采样与重构;通过向同轴电缆施加窄脉冲激励信号,依据回波信号模式分析完成了同轴电缆形变的有效监测;实验室中的大量实验数据表明,将TDR技术应用于同轴电缆形变监测原理正确,文中设计的方案可行.

Research and Realization of Coaxial-cable Deformation TDR Monitoring Technology

There have a lot of applications of the Time Domain Reflectomentry, especially in geologic hazard, landslide forecasting and soil water content analysis. Use the coaxial--cable shape deformation monitoring arithmetic of TDR technology, the hardware of measurement system is designed. The equivalent sampling arithmetic has been exerted, and the high speed echo signal equivalent collection has been realized and rebuilt. Putting narrow pulse actuating signal on coaxial--cable, and according to the echo signal mode analyses, there has been done the availability monitoring of coaxial--cable shape deformation. The numbers of experiments in laboratory are testified that using the TDR technology on coaxial--cable shape deformation monitoring theory is right. The cases of this paper are feasible and in reason.