【摘要】：隨著水聲事業(yè)的不斷發(fā)展,陣列信號處理技術(shù)逐漸的引入到水聲事業(yè)中,并作為水聲事業(yè)的一個重點研究方向,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的記錄需求,設(shè)計了多通道數(shù)據(jù)采集存儲系統(tǒng)。系統(tǒng)將經(jīng)過信號調(diào)理電路處理后的48元聲納基陣拾取信號進行同步采集,并借助于GPS獲取數(shù)據(jù)采樣點的時間信息。數(shù)據(jù)的開始采集時間與整點時刻高精度對齊,多套設(shè)備可同步工作以獲取同一時刻空間內(nèi)多個點的聲場信息。采集的數(shù)據(jù)與數(shù)據(jù)對應(yīng)時間信息打包并記錄到存儲介質(zhì)中。論文主要包括系統(tǒng)方案的設(shè)計、硬件平臺的搭建、配套軟件的編寫等內(nèi)容。以EP2C8Q208型號的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)功能指標的需求進行了外圍電路的拓展。系統(tǒng)以6片AD轉(zhuǎn)換芯片完成48個通道模擬信號的模數(shù)轉(zhuǎn)換工作,并借助于GPS和原子鐘完成精準的時間管理,以容量為512GB的SATA硬盤作為存儲介質(zhì)記錄采集數(shù)據(jù)。通過FPGA和OMAP的協(xié)調(diào)工作,將AD采集的信號完整的記錄到SATA硬盤中,實現(xiàn)系統(tǒng)功能的需求。最后,在實驗室環(huán)境下進行測試并進行了外場試驗,對系統(tǒng)的功能指標及其性能進行了驗證。結(jié)果表明,多通道數(shù)據(jù)采集存儲系統(tǒng)滿足了各項指標的要求,工作狀態(tài)穩(wěn)定可靠,達到了預(yù)期的目標。
[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)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB565

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本文編號：2342250