纯剪状态下同轴电缆TDR反射特征研究

TDR Reflection Characteristic of Coaxial Cable Under Pure Shearing

为探索TDR技术在滑坡监测中的推广应用,利用自行设计的实验装置,对不同型号同轴电缆在纯剪切状态下的TDR反射特性进行了深入研究。首先检验了TDR反应剪切位置的精度情况,然后对各种同轴电缆的TDR反射系数与剪切位移的关系及力学特性进行了总结;并对比了国产电缆与进口电缆的TDR反射特性,探讨了国产电缆替代进口电缆的可行性,最终选定了SYWY-75-9(4P)型号的同轴电缆作为进口电缆的替代品。

The TDR reflection characteristic of coaxial cable in different types under pure shearing is tested by self-design experimental facility. First, the accuracy of shearing position by TDR is checked. Then the relationship between TDR reflection coefficient and shearing displacement and the mechanics property of different types of coaxial cable are summarized, and both of the reflection characteristic of coaxial cable in domestic and abroad was compared, the replacement feasibility of imported coaxial cable by home coaxial cable is discussed, and finally the SYWY-75-9（4P） coaxial cable is choosed to replace the imported coaxial cable.