本文選題：聲吶 + 包絡(luò)解調(diào)��； 參考：《聲學(xué)學(xué)報》2016年06期

【摘要】：文章針對非線性聲學(xué)寬帶參量陣技術(shù)應(yīng)用于近海海底剖面繪制及掩埋物探測進行了分析研究。對于寬帶參量陣聲吶產(chǎn)生的差頻信號利用Berktay包絡(luò)解調(diào)理論和KZK(Khokhlov-Zabolotskaya-Kuznetsov)方程,對其進行了理論分析,水池實驗研究和時域數(shù)值模擬,并結(jié)合聲吶方程計算,說明該技術(shù)用于近海探測的可行性。本文同時結(jié)合脈沖壓縮技術(shù)對產(chǎn)生的寬帶差頻信號做匹配處理,用于提高設(shè)備的垂直分辨率。最后在海試實驗中,利用文中設(shè)計的參量陣聲吶,分別使用寬帶差頻信號和單頻差頻信號對淺海海底沉積層和海底掩埋管線進行探測,取得了清晰的剖面圖和掩埋物探測結(jié)果,驗證了寬帶參量陣技術(shù)在海底探測中的有效性和實用性。
[Abstract]:In this paper, the application of nonlinear acoustic broadband parametric array technology in offshore seabed profiling and buried detection is analyzed and studied. Using Berktay envelope demodulation theory and KZK Khokhlov-Zabolotskaya-Kuznetsov equation, the differential frequency signals generated by wideband parametric sonar are analyzed theoretically, studied experimentally and numerically simulated in time domain, and calculated with sonar equation. The feasibility of using this technique in offshore exploration is illustrated. At the same time, the pulse compression technique is used to match the wideband differential frequency signal, which is used to improve the vertical resolution of the equipment. Finally, in the sea trial experiment, using the parametric sonar designed in this paper, wideband differential frequency signal and single frequency difference frequency signal are used to detect the sediment layer and buried pipeline in shallow sea respectively, and the clear profile and the detection result of the buried material are obtained. The validity and practicability of wideband parametric array technology in submarine exploration are verified.
【作者單位】： 中國科學(xué)院聲學(xué)研究所東海研究站;
【基金】：上海市科委創(chuàng)新行動計劃項目(12231203800)資助
【分類號】：P715;TB56

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