朱代柱.水下瞬态信号的检测与识别[J].声学技术,2007,(4):592~596 |
水下瞬态信号的检测与识别 |
Detection and discrimination of underwater transient signal |
投稿时间:2007-05-09 修订日期:2007-05-29 |
DOI: |
中文关键词: 瞬态信号 时频谱图 图像处理 检测与识别 |
英文关键词: transient signal time-frequency spectrogram image processing detection and discrimination |
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中文摘要: |
对于水下瞬态信号这种突发性很强、持续时间又非常短、且出现后一般不再重复的信号,如何才能进行全自动的快速有效的检测与识别,是近期国内外研究的热点。针对水下目标快速变速所产生的瞬态信号的自动检测与识别问题,传统信号处理方法难以适用,文中引入了图像处理的有关理念和技术,提出了“取重心处理”的方法,并提出了一种便于工程实现的快速算法。对海试数据的分析结果表明,该方法稳定可靠,有望应用于工程实践中。 |
英文摘要: |
Automatic detection and discrimination of underwater transient signals have been intensely studied.The difficulty lies in the characteristics of sudden bursting of the signals,i.e.,they last for very short time and appear only once.We study automatic detection and discrimination of underwater transient signals produced by rapidly moving targets.As traditional methods are unsuitable,a technique based on image processing is introduced.The new method takes the "gravity center" and is suitable for engineering practices.Results of field-test show effectiveness of the method. |
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