【摘要】：在淺海的工作環(huán)境下,船舶或海上作業(yè)平臺的動力定位噪聲嚴(yán)重地干擾全景掃描聲吶的聲圖。目前的各種干擾抵消技術(shù)實際效果不理想,動力定位狀態(tài)下其對全景掃描聲吶的信號檢測能力提高有限。本文提出通過收放全景掃描聲吶的鎧裝電纜恢復(fù)被掩蓋了的目標(biāo)信號的方法,計算了動力定位螺旋槳噪聲干擾的直達波和海底反射波到達接收陣的入射角;仿真分析了接收陣入水深度對螺旋槳噪聲干擾的直達波和多途影響,以及引起的盲區(qū)方位變化情況;仿真結(jié)果表明可提高全景掃描聲吶的探測能力,為全景掃描聲吶設(shè)計者采取相應(yīng)的信號處理算法來抑制動力定位噪聲的干擾提供了依據(jù)。
[Abstract]:In the working environment of shallow sea, the dynamic positioning noise of ship or offshore operation platform seriously interferes with the sonogram of panoramic scanning Sonar. At present, the actual effect of various interference cancellation techniques is not ideal, and the signal detection ability of panoramic scanning Sonar is limited in the state of dynamic positioning. In this paper, a method is proposed to recover the masked target signal by collecting and playing the armored cable of panoramic scanning Sonar, and the incident angles of the direct wave and the reflected wave arriving at the receiving array of the noise interference of the dynamic positioning propeller are calculated. The direct wave and multi-path influence of the water intake depth of the receiving array on the noise interference of the propeller, as well as the azimuth variation of the blind area caused by the depth of the receiving array, are simulated and analyzed. The simulation results show that the detection ability of panoramic scanning Sonar can be improved, which provides a basis for panoramic scanning Sonar designers to adopt the corresponding signal processing algorithm to suppress the interference of dynamic positioning noise.
【作者單位】： 中國科學(xué)院聲學(xué)研究所;中國科學(xué)院大學(xué);
【基金】：國家自然科學(xué)基金項目(61471353)
【分類號】：U664.82;U666.7
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本文編號：2486247