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利用声波图象来检测水声信号是一个有趣的方法。信号图象可以通过电子计算机或光学元件来进行加工处理,从而提高检测的灵敏度。水声信号图象化检测能够直接显示水声信号的形象。由于图象中的每个象素是一个两维函数,所以它的特征信息量多于一般声电换能器所获得的一维电信号信息,因而有利于提高接收信号的信噪比。在本文的实验中,将收到的信号声波图象进行了空间滤波并在计算机上作了增显加工,并摄取了它的相片。
Using acoustic images to detect underwater acoustic signals is an interesting way. Signal images can be processed by electronic computers or optics to increase the sensitivity of the inspection. Underwater signal visualization detection can directly display the underwater acoustic image. Since each pixel in the image is a two-dimensional function, it has more characteristic information than the one-dimensional electrical signal obtained by a general acoustic-electric transducer, which is beneficial to improve the signal-to-noise ratio of the received signal. In the experiment of this paper, the received signal acoustic image was spatially filtered and processed on the computer, and its photos taken.