本文選題：海底沉積物 + 聲學(xué)參數(shù)　； 參考：《湘潭大學(xué)》2017年碩士論文

【摘要】：海底沉積物作為海洋的一個重要組成成分,其聲學(xué)參數(shù)的研究越來越受科學(xué)研究者們的重視。目前海底沉積物聲學(xué)參數(shù)的測量方法分為實驗室測量和海底原位測量,其中海底原位測量因?qū)５壮练e物的原始環(huán)境造成的擾動小,測量值更接近于真實值,已逐漸成為海底沉積物聲學(xué)參數(shù)測量方法的主流方法。為進一步提高海底沉積物聲學(xué)參數(shù)原位測量精度以及對現(xiàn)有的海底沉積物聲學(xué)參數(shù)原位測量裝置的不足之處的改善,本文研制了基于FPGA的新型的海底沉積物聲學(xué)參數(shù)原位自動測量系統(tǒng),將可編程邏輯器件的優(yōu)勢運用到海底沉積物聲學(xué)參數(shù)的研究領(lǐng)域中。本文的主要研究內(nèi)容與結(jié)果如下:(1)研制了海底沉積物聲學(xué)參數(shù)自動測量系統(tǒng)的硬件平臺。通過靈活運用Multisim、FilterPro和Altium Designer等軟件實現(xiàn)了對測量系統(tǒng)的硬件平臺設(shè)計,包括原位測量系統(tǒng)整體方案設(shè)計、聲波自動測量儀方案設(shè)計、數(shù)據(jù)采集系統(tǒng)的硬件電路原理圖的繪制和仿真,以及PCB電路板的設(shè)計。(2)開發(fā)了數(shù)據(jù)采集系統(tǒng)的硬件程序。通過Cypress公司官方提供的固件程序模板和上位機軟件,以Keil uVision4為編譯環(huán)境,設(shè)計了本系統(tǒng)的EZ-USB FX2LP固件程序;其次采用模塊化設(shè)計思路,運用Quartus Prime軟件實現(xiàn)對Intel Cyclone IV EP4CE6E22C6N FPGA芯片的數(shù)字電路系統(tǒng)設(shè)計,并闡述了其中主要模塊的設(shè)計原理,整個數(shù)字電路系統(tǒng)達到了系統(tǒng)所需的要求。(3)開發(fā)了聲波自動測量儀的應(yīng)用程序并進行了實驗室測試。以LabVIEW軟件為設(shè)計平臺,設(shè)計了聲波自動測量儀的人機交互界面,實現(xiàn)了儀器參數(shù)可控和聲學(xué)參數(shù)的自動計算及保存,并對其中的部分核心模塊的設(shè)計進行了解釋;其次對聲波自動測量儀進行了組裝及實驗室測試,通過聲波自動測量儀和示波器對信號發(fā)生器產(chǎn)生的正弦波進行對比測試,以及對大理石式樣進行聲學(xué)參數(shù)測試,驗證了聲波自動測量儀的準確性及功能完善性。本文的研究拓寬了海底沉積物聲學(xué)參數(shù)原位測量的測量方法,實現(xiàn)了可編程邏輯器件和海底沉積物聲學(xué)研究的結(jié)合,對海底沉積物聲學(xué)性能研究具有一定的參考價值。
[Abstract]:As an important component of the ocean, the study of acoustic parameters of seafloor sediment has been paid more and more attention by scientific researchers. At present, the measurement methods of acoustic parameters of seafloor sediment are divided into laboratory measurement and in situ measurement, in which the disturbance caused by in situ measurement of seabed sediment is small, and the measured value is closer to the real value. It has gradually become the mainstream method for measuring acoustic parameters of seabed sediments. In order to further improve the accuracy of in-situ measurement of acoustic parameters of seafloor sediments and to improve the deficiencies of the existing in situ measuring devices for acoustic parameters of seafloor sediments, In this paper, a new in situ automatic measurement system of seabed sediment acoustic parameters based on FPGA is developed. The advantages of programmable logic devices are applied to the research field of seabed sediment acoustic parameters. The main contents and results of this paper are as follows: (1) the hardware platform of the automatic measurement system for acoustic parameters of seafloor sediment is developed. The hardware platform design of the measurement system is realized by using Multisiman filter Pro and Altium Designer software flexibly, including the whole scheme design of the in-situ measurement system, the scheme design of the acoustic wave automatic measuring instrument, the drawing and simulation of the hardware circuit schematic diagram of the data acquisition system. And the design of PCB circuit board. 2) the hardware program of data acquisition system is developed. Through the firmware program template provided by Cypress company and the upper computer software, the EZ-USB FX2LP firmware program of the system is designed with Keil uVision4 as the compiling environment. Secondly, the modular design thought is adopted. The design of digital circuit system of Intel Cyclone IV EP4CE6E22C6N FPGA chip is realized by using Quartus Prime software, and the design principle of main modules is expounded. The whole digital circuit system has met the requirement of the system. (3) the application program of the acoustic wave automatic measuring instrument has been developed and the laboratory test has been carried out. Based on the LabVIEW software, the man-machine interface of the acoustic automatic measuring instrument is designed, which realizes the automatic calculation and preservation of the instrument parameters and the acoustic parameters, and explains the design of some core modules. Secondly, the sonic automatic measuring instrument is assembled and tested in the laboratory. The sinusoidal wave generated by the signal generator is tested by the acoustic automatic measuring instrument and oscilloscope, and the acoustic parameters of the marble pattern are tested. The accuracy and perfect function of the acoustic wave automatic measuring instrument are verified. The research in this paper broadens the measurement method of seabed sediment acoustic parameters in situ, realizes the combination of programmable logic device and seabed sediment acoustic research, and has a certain reference value for the study of seabed sediment acoustic properties.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P733.2

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