【摘要】：隨著高科技的快速發(fā)展,各個(gè)領(lǐng)域的工作效率在不斷提高,與此同時(shí)煤礦的開采技術(shù)和開采效率也在不斷進(jìn)步和提高,然而煤礦突水及瓦斯安全等突發(fā)性事故仍時(shí)有發(fā)生。針對(duì)煤層周邊地質(zhì)情況復(fù)雜,煤礦安全事故較多等問題,該論文設(shè)計(jì)了一種能夠提前探測(cè)煤層中的水和氣體的無線發(fā)射系統(tǒng)。本文研究的是四通道寬頻發(fā)射機(jī)系統(tǒng),該系統(tǒng)主要由信號(hào)發(fā)生器模塊、功率放大器模塊以及天線模塊等組成。信號(hào)發(fā)生器是利用當(dāng)前比較流行的FPGA設(shè)計(jì)實(shí)現(xiàn),在QuartusⅡ13.1開發(fā)環(huán)境下,通過編寫Verilog硬件描述語言,智能、快速的產(chǎn)生需要的高頻信號(hào),最后編寫測(cè)試文件調(diào)用ModelSim對(duì)產(chǎn)生的信號(hào)進(jìn)行仿真驗(yàn)證;功率放大器則根據(jù)前后信號(hào)功率需求,采用的是PHILIPS公司的高頻功率晶體管BLF404,用Altium Designer軟件實(shí)現(xiàn)晶體管外圍電路及PCB設(shè)計(jì),并對(duì)晶體管進(jìn)行ADS仿真;天線部分則采用的是適合無線探測(cè)的微帶天線,綜合考慮最終采用的是半波長(zhǎng)雙頻的微帶貼片天線,用HFSS對(duì)天線進(jìn)行仿真優(yōu)化,制作實(shí)物天線。系統(tǒng)設(shè)計(jì)主要由FPGA產(chǎn)生四路高頻脈沖信號(hào),分別通過功率放大器后,經(jīng)天線將高頻信號(hào)饋入地下,由此完成發(fā)射功能。利用多通道、多頻點(diǎn)技術(shù)的特點(diǎn),可以探測(cè)地下介質(zhì)的種類及分布結(jié)構(gòu)情況,這對(duì)在煤礦開采過程中提前了解煤層周圍情況,降低煤礦安全事故有一定的實(shí)際意義。對(duì)于該系統(tǒng),本文將各個(gè)模塊進(jìn)行了相應(yīng)的分析與仿真。結(jié)果表明,四通道寬頻發(fā)射機(jī)系統(tǒng)的設(shè)計(jì)是可實(shí)現(xiàn)的,它可以對(duì)煤層中的水、氣體進(jìn)行檢測(cè),對(duì)無線超前探測(cè)技術(shù)的研究應(yīng)用起到了推廣作用。
[Abstract]:With the rapid development of high technology, the work efficiency in various fields is constantly improving, at the same time, the mining technology and efficiency of coal mines are also improving. However, sudden accidents such as water inrush and gas safety still occur from time to time. In view of the complex geological situation around the coal seam and the frequent coal mine safety accidents, this paper designs a wireless emission system which can detect the water and gas in the coal seam in advance. This paper studies a four-channel broadband transmitter system, which consists of signal generator module, power amplifier module and antenna module. The signal generator is realized by using the popular FPGA design at present. Under the development environment of Quartus 鈪，

本文編號(hào)：2315288