基于软件无线电的甚低频法探矿的研究

发布时间：2018-03-16 12:00

本文选题：甚低频法　切入点：软件无线电　出处：《地球物理学进展》2016年01期 　论文类型：期刊论文

【摘要】：甚低频电磁法在对矿体的定位预测中,扮演了不可替代的作用,但是当今社会的勘察与开采研发逐步加深及其露头矿与浅层矿的量藏逐步减少,致使探矿的难度相应加大.这就要求我们必须对地下隐伏矿体做出更加准确的定位探测,至此,提出一种甚低频法与软件无线电技术进行组合应用的物探新方法亟不可待,利用俄罗斯甚低频Alpha导航系统发射的大功率高精度的甚低频(VLF)信号作为场源,这些信号导入地下后是一些强大的电磁波信号,遇到良导体发出电磁感应致使振幅和相位的异化,经过射频天线、抗混叠滤波器、A/D转换器等,最后由信号处理分析仪分析计算出感应电磁场振幅和相位的变化量,电磁场的垂直分量、水平分量和极化倾角并判断出零交点的准确位置,为隐伏矿体的准确定位提供依据.最后做出相应的仿真,验证了该方法的可行性.
[Abstract]:The very low frequency electromagnetic method plays an irreplaceable role in the localization and prediction of ore bodies, but the research and development of prospecting and mining are gradually deepened and the quantity of outcrop and shallow ore deposits is gradually reduced. This requires us to make more accurate positioning and detection of underground concealed orebodies. At this point, a new geophysical exploration method combining VLF method with software radio technology is proposed. The high power and high precision very low frequency (VLF) Alpha signals transmitted by the Russian VLF navigation system are used as field sources. After these signals are introduced into the ground, some powerful electromagnetic signals are produced. When a good conductor emits electromagnetic induction, the amplitude and phase are dissimilated. After RF antenna, anti-aliasing filter, A / D converter and so on, the amplitude and phase change of induction electromagnetic field and the vertical component of electromagnetic field are calculated by signal processing analyzer. The horizontal component and polarization inclination angle and the accurate position of the zero intersection point can provide the basis for the accurate location of the concealed orebody. Finally, the corresponding simulation is made to verify the feasibility of the method.
【作者单位】：河南师范大学物理与电子工程学院;河南省电磁波特征信息探测重点学科开放重点实验室;
【基金】：国家自然科学基金项目(49070217)资助
【分类号】：P631.3

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