CAJ | 학술논문

水下声探测是外国调查船和水下文物盗捞船进行非法调查和探测的主要技术手段，根据信号的主要声特征，对海洋水下声探测信号进行分类，分为宽带中、低频信号和窄带高频信号。在福建兴化湾海域采集了浅地层剖面仪信号、电火花声源信号、侧扫声纳信号和单频测深信号4种代表性的海洋水下声探测信号，根据声特征分析给出了对应的分类，其中：浅地层剖面仪信号为信号类型确定的中、低频信号；电火花声源信号为宽带脉冲中、低频信号；侧扫声纳信号和单频测深信号为窄带高频信号。通过对4种实测声探测数据的分析研究，给出了对应类型的海洋水下声探测信号的分析、提取方法，其中：信号类型确定的中低信号和窄带高频信号在初步的时、频分析基础上，可通过带通滤波提取；宽带脉冲中、低频信号在初步的时、频分析基础上，可尝试通过小波尺度相关滤波的方法提取。结合已知的水下声探测信号的主要声特征，实现对采集的海洋水下声探测信号的识别。
수하성탐측시외국조사선화수하문물도로선진행비법조사화탐측적주요기술수단，근거신호적주요성특정，대해양수하성탐측신호진행분류，분위관대중、저빈신호화착대고빈신호。재복건흥화만해역채집료천지층부면의신호、전화화성원신호、측소성납신호화단빈측심신호4충대표성적해양수하성탐측신호，근거성특정분석급출료대응적분류，기중：천지층부면의신호위신호류형학정적중、저빈신호；전화화성원신호위관대맥충중、저빈신호；측소성납신호화단빈측심신호위착대고빈신호。통과대4충실측성탐측수거적분석연구，급출료대응류형적해양수하성탐측신호적분석、제취방법，기중：신호류형학정적중저신호화착대고빈신호재초보적시、빈분석기출상，가통과대통려파제취；관대맥충중、저빈신호재초보적시、빈분석기출상，가상시통과소파척도상관려파적방법제취。결합이지적수하성탐측신호적주요성특정，실현대채집적해양수하성탐측신호적식별。
Underwater acoustic detection was an important technique used in illegal survey and detection by foreign survey ships and by ships of underwater cultural relics.The ocean underwater acoustic detection signals were classi-fied according to the acoustic characteristics of signals.It was divided into broadband middle and low frequency sig-nals and narrowband high frequency signals.Four representative ocean underwater acoustic detection signals of sub-bottom profiler signal,spark sound source signal,side scan sonar signal and single frequency bathymetric signal had been measured in Xinghua Bay,Fujian Province,according the acoustic characteristics and their corresponding classification had been given.Among them,the sub-bottom profile signal was the middle and low frequency signal and its signal type was determined.The spark sound source signal was also the middle and low frequency signal but its signal type was broadband pulse.The side scan sonar signal and single frequency bathymetric signal were nar-rowband high frequency signal.Through the analysis of 4 groups of measured acoustic detection data,the analysis and extracted methods of corresponding types of ocean underwater acoustic detection signals had been given.Among them,the middle and low frequency signal which its signal type was determined and narrowband high frequency sig-nal can be extracted by band-pass filtering based on time-frequency analysis,the broadband pulse middle and low frequency signal can be tested and extracted by wavelet scale correlation filtering method based on time-frequency analysis.Combined with the acoustic characteristics of the known underwater acoustic detection signals,the meas-ured ocean underwater acoustic detection signals can be identified.