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电磁导波检测信号瞬时特征提取研究

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摘要 针对电磁导波检测信号的缺陷识别问题,首先对信号进行离散小波包分解,提取出变化明显的子频带小波包系数进行重构,然后分析该重构信号瞬时相位和幅值的特征信息,通过对比不同缺陷情况下瞬时相位和幅值的变化趋势,得到缺陷特征,完成缺陷识别。
出处 《无损探伤》 2011年第6期5-7,12,共4页 Nondestructive Testing Technology
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