【摘要】：隨著水聲事業(yè)的不斷發(fā)展,陣列信號(hào)處理技術(shù)逐漸的引入到水聲事業(yè)中,并作為水聲事業(yè)的一個(gè)重點(diǎn)研究方向,協(xié)助著人們探索著海洋這片神秘的領(lǐng)域。聲納基陣系統(tǒng)作為新型聲納體系的典型代表,改善了單個(gè)換能器指向性、靈敏度、增益等多方面的性能,并為水聲領(lǐng)域中陣列信號(hào)處理技術(shù)的研究提供了物質(zhì)條件。論文基于聲納基陣拾取信號(hào)的記錄需求,設(shè)計(jì)了多通道數(shù)據(jù)采集存儲(chǔ)系統(tǒng)。系統(tǒng)將經(jīng)過信號(hào)調(diào)理電路處理后的48元聲納基陣拾取信號(hào)進(jìn)行同步采集,并借助于GPS獲取數(shù)據(jù)采樣點(diǎn)的時(shí)間信息。數(shù)據(jù)的開始采集時(shí)間與整點(diǎn)時(shí)刻高精度對(duì)齊,多套設(shè)備可同步工作以獲取同一時(shí)刻空間內(nèi)多個(gè)點(diǎn)的聲場(chǎng)信息。采集的數(shù)據(jù)與數(shù)據(jù)對(duì)應(yīng)時(shí)間信息打包并記錄到存儲(chǔ)介質(zhì)中。論文主要包括系統(tǒng)方案的設(shè)計(jì)、硬件平臺(tái)的搭建、配套軟件的編寫等內(nèi)容。以EP2C8Q208型號(hào)的FPGA和外設(shè)豐富的雙核處理器OMAPL138為主控芯片,在此基礎(chǔ)上根據(jù)功能指標(biāo)的需求進(jìn)行了外圍電路的拓展。系統(tǒng)以6片AD轉(zhuǎn)換芯片完成48個(gè)通道模擬信號(hào)的模數(shù)轉(zhuǎn)換工作,并借助于GPS和原子鐘完成精準(zhǔn)的時(shí)間管理,以容量為512GB的SATA硬盤作為存儲(chǔ)介質(zhì)記錄采集數(shù)據(jù)。通過FPGA和OMAP的協(xié)調(diào)工作,將AD采集的信號(hào)完整的記錄到SATA硬盤中,實(shí)現(xiàn)系統(tǒng)功能的需求。最后,在實(shí)驗(yàn)室環(huán)境下進(jìn)行測(cè)試并進(jìn)行了外場(chǎng)試驗(yàn),對(duì)系統(tǒng)的功能指標(biāo)及其性能進(jìn)行了驗(yàn)證。結(jié)果表明,多通道數(shù)據(jù)采集存儲(chǔ)系統(tǒng)滿足了各項(xiàng)指標(biāo)的要求,工作狀態(tài)穩(wěn)定可靠,達(dá)到了預(yù)期的目標(biāo)。
[Abstract]:With the continuous development of underwater acoustic industry, array signal processing technology is gradually introduced into underwater acoustic cause, and as a key research direction of underwater acoustic cause, it helps people to explore the mysterious field of ocean. As a typical representative of a new type of sonar system, sonar array system improves the directivity, sensitivity and gain of single transducer, and provides material conditions for the research of array signal processing technology in underwater acoustic field. In this paper, a multi-channel data acquisition and storage system is designed based on the recording requirement of sonar array pickup signal. After the signal conditioning circuit is processed, the 48 element sonar array pick-up signal is collected synchronously, and the time information of the data sampling point is obtained by means of GPS. The starting time of data acquisition is highly accurate aligned with the whole point time, and multiple devices can work synchronously to obtain the sound field information of multiple points in the space at the same time. The collected data and the corresponding time information of the data are packed and recorded in the storage medium. The thesis mainly includes the design of system scheme, the construction of hardware platform and the compilation of supporting software. Based on the EP2C8Q208 FPGA and the peripheral dual-core processor OMAPL138 as the main control chip, the peripheral circuits are extended according to the functional requirements. The system uses 6 AD conversion chips to complete the analog-to-digital conversion of 48 channel analog signals. With the help of GPS and atomic clock, the system completes accurate time management, and uses the SATA hard disk with the capacity of 512GB as the storage medium to record and collect the data. Through the coordinated work of FPGA and OMAP, the signal collected by AD is recorded into the SATA hard disk, and the requirement of system function is realized. Finally, the system's function and performance are tested and tested in the laboratory environment. The results show that the multi-channel data acquisition and storage system meets the requirements of various indexes, and the working state is stable and reliable.
【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】：2014
【分類號(hào)】：TB565

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 談?lì)楆?yáng);;對(duì)Ext2文件系統(tǒng)的研究[J];中國(guó)新通信;2012年21期

2 王文巖;包劍;羅超;;FAT32文件系統(tǒng)結(jié)構(gòu)分析[J];遼寧工程技術(shù)大學(xué)學(xué)報(bào);2004年S1期

3 王琳,商周,王學(xué)偉;數(shù)據(jù)采集系統(tǒng)的發(fā)展與應(yīng)用[J];電測(cè)與儀表;2004年08期

4 周福洪,鄭士杰,姚青山;新型換能器及聲基陣的發(fā)展概況[J];聲學(xué)技術(shù);1990年04期

相關(guān)博士學(xué)位論文 前3條

1 陳陽(yáng);水聲陣列信號(hào)處理理論及實(shí)驗(yàn)研究[D];哈爾濱工程大學(xué);2010年

2 顧建峰;陣列信號(hào)處理中的若干問題研究[D];電子科技大學(xué);2008年

3 陳四根;陣列信號(hào)處理相關(guān)技術(shù)研究[D];哈爾濱工程大學(xué);2004年

相關(guān)碩士學(xué)位論文 前1條

1 張忠奎;便攜式四通道數(shù)據(jù)采集儀的設(shè)計(jì)[D];哈爾濱工程大學(xué);2013年

，

本文編號(hào)：2342250