高频电磁波在媒质中的反射波特征分析  

Analysis on characteristics of reflected waves in different media for HF-electromagnetic waves

作　　者：王通[1] 张虎元[1] 

机构地区：[1]兰州大学西部灾害与环境力学教育部重点实验室,兰州730000

出　　处：《工程勘察》2011年第2期85-89,共5页Geotechnical Investigation & Surveying

摘　　要：地质雷达探测方法是通过识别高频电磁波在媒质中的反射波(即回波信号)特征来推断目标体的类型及空间赋存状态。文章以金属板、混凝土钢筋、地下含水层、破碎岩体、断层带及岩溶洞穴等目标体为例,分别对其反射信号的图像特征进行振幅特征、相位特征及时频特征分析,总结不同媒质对高频电磁波的反射特征,提高地质雷达探测方面对异常的判断能力和解译精度。The GPR（Ground Penetrating Radar） method is through the identification of reflection（i.e.echo signal） characteristics of high-frequency（HF） electromagnetic waves in a medium to infer the object type and spatial state.Taking the sheet metal,the concrete reinforcing steel bars,the phreatic layers,the fractured rocks,the faulted zones and the karst caves as the examples,the imagine features such as the amplitude,phase and time-frequency characteristics of the reflected signal from GPR are analyzed respectively,and the reflected features of the HF-electromagnetic waves in different media are summarized,which would be with the advantages to estimate the abnormal from the GPR detection and to make accurate interpretation.

关 键 词：高频电磁波 反射波 特征分析 

分 类 号：P631.3[天文地球—地质矿产勘探]