TDR滑坡监测技术的研究

The study on landslide monitoring with TDR technology

时间域反射测试技术 (TimeDomainReflectometry)是一种电子测量技术 ,许多年来 ,一直被用于各种物体形态特征的测量和空间定位。TDR用于滑坡监测时 ,向埋入监测孔内的电缆发射脉冲信号 ,当遇到电缆在孔中产生变形时 ,就会产生反射波信号。经过对反射信号的分析 ,就能确定电缆发生形变的程度和位置。本文通过与传统的滑坡监测方法相比较 ,发现这种方法具有成本低、节省监测时间等特点。

Time Domain Reflectometry, or TDR, is an electrical measurement technique. TDR has been used for many years to determine the spatial location and nature of various objects. This paper describes the use of TDR to monitor landslide. In TDR, a pulse waveform is sent down a coaxial cable, which is installed in the boreholes. If the pulse encounters a change in the characteristic impedance of the cable, it is reflected. The localization and magnitude of the cable deformation can be determined through analyzing the reflected signal. At last, the paper compares TDR with the standard inclinometer technology. It is evident that TDR system has many advantages (cost less, save time, etc.).