| 水下瞬态信号的检测与识别 |
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| 引用本文： | 朱代柱. 水下瞬态信号的检测与识别[J]. 声学技术, 2007, 26(4): 592-596 |
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| 作者姓名： | 朱代柱 |
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| 作者单位： | 上海交通大学船舶海洋与建筑工程学院,上海,200030;上海船舶电子设备研究所,上海,201108 |
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| 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。
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| 关 键 词： | 瞬态信号 时频谱图 图像处理 检测与识别 |
| 文章编号： | 1000-3630（2007）-04-0592-05 |
| 收稿时间： | 2007-05-09 |
| 修稿时间： | 2007-05-29 |
Detection and discrimination of underwater transient signal |
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| ZHU Dai-zhu. Detection and discrimination of underwater transient signal[J]. Technical Acoustics, 2007, 26(4): 592-596 |
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| Authors: | ZHU Dai-zhu |
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| Affiliation: | 1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai, 200030; 2. Shanghai Marine Electric Equipment Institute, Shanghai, 201108 |
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| Abstract: | Automatic detection and discrimination of underwater transient signals have been intensely stu-died.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 sign-als produced by rapidly moving targets.As traditional methods are unsuitable,a technique based on im-age 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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| Keywords: | transient signal time-frequency spectrogram image processing detection and discrimination |
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