本文選題：甚低頻法　切入點：軟件無線電　出處：《地球物理學(xué)進展》2016年01期 　論文類型：期刊論文

【摘要】：甚低頻電磁法在對礦體的定位預(yù)測中,扮演了不可替代的作用,但是當(dāng)今社會的勘察與開采研發(fā)逐步加深及其露頭礦與淺層礦的量藏逐步減少,致使探礦的難度相應(yīng)加大.這就要求我們必須對地下隱伏礦體做出更加準(zhǔn)確的定位探測,至此,提出一種甚低頻法與軟件無線電技術(shù)進行組合應(yīng)用的物探新方法亟不可待,利用俄羅斯甚低頻Alpha導(dǎo)航系統(tǒng)發(fā)射的大功率高精度的甚低頻(VLF)信號作為場源,這些信號導(dǎo)入地下后是一些強大的電磁波信號,遇到良導(dǎo)體發(fā)出電磁感應(yīng)致使振幅和相位的異化,經(jīng)過射頻天線、抗混疊濾波器、A/D轉(zhuǎn)換器等,最后由信號處理分析儀分析計算出感應(yīng)電磁場振幅和相位的變化量,電磁場的垂直分量、水平分量和極化傾角并判斷出零交點的準(zhǔn)確位置,為隱伏礦體的準(zhǔn)確定位提供依據(jù).最后做出相應(yīng)的仿真,驗證了該方法的可行性.
[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.
【作者單位】： 河南師范大學(xué)物理與電子工程學(xué)院;河南省電磁波特征信息探測重點學(xué)科開放重點實驗室;
【基金】：國家自然科學(xué)基金項目(49070217)資助
【分類號】：P631.3

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本文編號：1619819