【摘要】：我國(guó)礦產(chǎn)資源豐富，，然而礦難事件頻發(fā)。如果能夠?qū)崿F(xiàn)地下與地面的無(wú)線(xiàn)通信，將會(huì)極大地提高救援效率。目前我國(guó)還沒(méi)有自主知識(shí)產(chǎn)權(quán)的礦井透地應(yīng)急救援通信系統(tǒng)。礦難發(fā)生時(shí)，其他有線(xiàn)通信手段往往會(huì)發(fā)生中斷，信號(hào)如何穿透地層實(shí)現(xiàn)與地下信息的雙向傳輸問(wèn)題是礦井無(wú)線(xiàn)應(yīng)急通信的關(guān)鍵瓶頸技術(shù)。而采用電偶極子天線(xiàn)，基于傳導(dǎo)電流場(chǎng)理論實(shí)現(xiàn)透地信息傳輸是解決該瓶頸問(wèn)題的行之有效的方法之一。 本文在分析國(guó)內(nèi)外地下通信的研究背景下，選用具有天線(xiàn)體積設(shè)計(jì)小、對(duì)環(huán)境依賴(lài)性小的基于電流場(chǎng)理論的通信方式。 首先，介紹傳導(dǎo)電流場(chǎng)透地通信理論，分析信號(hào)傳輸?shù)脑�。建立該傳輸方式的�?shù)學(xué)模型，并構(gòu)建基于MATLAB的軟件仿真平臺(tái)，分析傳輸距離、信號(hào)頻率與電導(dǎo)率對(duì)信號(hào)傳輸?shù)挠绊憽?然后，在實(shí)地環(huán)境中建立物理仿真模型，討論傳導(dǎo)電流、傳輸距離，電磁干擾以及噪聲對(duì)信號(hào)傳輸?shù)挠绊�，并觀察仿真圖形，為后續(xù)的系統(tǒng)設(shè)計(jì)提供優(yōu)化的參數(shù)。 最后，在理論研究和軟件仿真分析的基礎(chǔ)上，選取具有頻帶窄、功率利用率高、抗衰落、可用非相干進(jìn)行解調(diào)的π/4-DQPSK作為數(shù)字傳輸方案，設(shè)計(jì)了基于FPGA的電流場(chǎng)地下通信系統(tǒng)。重點(diǎn)編制了基于Verilog的π/4-DQPSK調(diào)制和解調(diào)程序，通過(guò)模塊化實(shí)現(xiàn)調(diào)制解調(diào)過(guò)程，方便程序的修改和調(diào)試；研發(fā)了該系統(tǒng)的硬件實(shí)現(xiàn)平臺(tái)（含發(fā)送、接收電路，小信號(hào)放大電路，功率放大電路）；此外還進(jìn)行了變壓器的設(shè)計(jì)，使天線(xiàn)的阻抗與功率放大器阻抗實(shí)現(xiàn)匹配，以完成大功率發(fā)送信號(hào)。整個(gè)通信系統(tǒng)從串口收發(fā)，對(duì)信號(hào)進(jìn)行調(diào)制解調(diào)以及D/A、A/D控制均可通過(guò)軟件編寫(xiě)實(shí)現(xiàn)，體現(xiàn)了軟件無(wú)線(xiàn)電的思想。
[Abstract]:China is rich in mineral resources, but mine accidents occur frequently. If underground and ground wireless communication can be realized, rescue efficiency will be greatly improved. At present, our country still has no independent intellectual property right mine penetrating ground emergency rescue communication system. When mine accident occurs, other wired communication means will often be interrupted. The key bottleneck technology of mine wireless emergency communication is how to realize two-way transmission of underground information through the formation. It is one of the effective methods to solve the bottleneck problem by using electric dipole antenna based on the theory of conduction current field to realize the transmission of information through the earth. In this paper, based on the analysis of underground communication at home and abroad, we choose the current field theory based communication mode with small antenna volume design and less environmental dependence. Firstly, the theory of transmissible current field is introduced, and the principle of signal transmission is analyzed. The mathematical model of the transmission mode is established, and the software simulation platform based on MATLAB is constructed to analyze the influence of transmission distance, signal frequency and conductivity on signal transmission. Then, the physical simulation model is established in the field environment to discuss the effects of conduction current, transmission distance, electromagnetic interference and noise on the signal transmission. The simulation figure is observed to provide the optimized parameters for the subsequent system design. Finally, on the basis of theoretical research and software simulation analysis, 蟺 / 4-DQPSK with narrow band, high power efficiency, anti-fading and non-coherent demodulation is selected as the digital transmission scheme, and a current field underground communication system based on FPGA is designed. The 蟺 / 4-DQPSK modulation and demodulation program based on Verilog is mainly compiled, and the modularization and demodulation process is realized through modularization, which facilitates the modification and debugging of the program, and the hardware implementation platform of the system (including transmitting, receiving circuit, small signal amplification circuit, etc.) is developed. In addition, the transformer is designed to match the impedance of the antenna with the impedance of the power amplifier to complete the high-power transmission signal. The whole communication system receives and receives signals from serial port, modulates and demodulates the signals, and controls the D / A / A / A / D by software programming, which embodies the idea of software radio.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TN929.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 吳志強(qiáng);李斌;;基于電流場(chǎng)的水下高速數(shù)字通信方法及實(shí)現(xiàn)[J];傳感技術(shù)學(xué)報(bào);2010年11期

2 蔣宇中,張曙霞,韓郁;強(qiáng)噪聲環(huán)境下測(cè)量甚低頻天線(xiàn)阻抗方法的研究[J];電波科學(xué)學(xué)報(bào);2004年05期

3 肖樂(lè)軍,劉福生,黃梅;;阻抗匹配平衡變壓器運(yùn)行特性研究的數(shù)學(xué)模型及實(shí)驗(yàn)驗(yàn)證[J];電工技術(shù)學(xué)報(bào);1993年04期

4 陳新國(guó),程耕國(guó);D類(lèi)功放的設(shè)計(jì)與分析[J];電子元件與材料;2004年02期

5 馮娟;林彬;;π/4-DQPSK調(diào)制解調(diào)位同步算法及其FPGA的實(shí)現(xiàn)[J];電子測(cè)量技術(shù);2008年06期

6 張雅珍;于映;;基于VerilogHDL語(yǔ)言的DPLL的數(shù)控振蕩器設(shè)計(jì)[J];國(guó)外電子測(cè)量技術(shù);2006年01期

7 葛勤革;;一種新的甚低頻發(fā)射機(jī)調(diào)機(jī)方法[J];海軍工程大學(xué)學(xué)報(bào);2009年04期

8 宋文姝;張?zhí)祢U;林孝康;;π/4-DQPSK調(diào)制解調(diào)技術(shù)的仿真及分析[J];計(jì)算機(jī)仿真;2006年08期

9 吳榮光;地下無(wú)線(xiàn)通信的發(fā)展過(guò)程及其展望[J];通信世界;2000年06期

10 張冀冠;張仲禮;汪凱斌;;礦用本安型無(wú)線(xiàn)巖體通信設(shè)備的研制[J];價(jià)值工程;2012年19期

本文編號(hào)：2200165