| 经验模态分解方法在混凝土模型检测中的应用 |
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| 引用本文： | 李广瑞,朱自强,鲁光银,密士文.经验模态分解方法在混凝土模型检测中的应用[J].物探与化探,2013(5):951-955. |
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| 作者姓名： | 李广瑞 朱自强 鲁光银 密士文 |
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| 作者单位： | 中南大学 地球科学与信息物理学院,湖南 长沙,410083 |
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| 摘 要： | 经验模态分解在处理非线性，多分量信号方面有其独特的优势，但是受信号采样率以及频程大小的影响，传统经验模态分解之后，各固有模态分解函数并非由单一频率成分组成。采用屏蔽信号和采样率内插相结合的方法来改进传统固有模态分解，得到的固有模态函数较传统EMD分解有很大改善。以改善分解后的固有模态函数为基础，利用合成孔径聚焦成像，成像结果可以很清楚的发现目标体的位置所在，证明了此种改进方法的可行性。
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| 关 键 词： | 固有模态分解 屏蔽信号 采样率内插 合成孔径聚焦成像 无损检测 |
THE APPLICATION OF EMPIRICAL MODE DECOMPOSITION TO NON-DESTRUCTIVE TESTING OF BRIDGES |
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| LI Guang-rui
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ZHU Zi-qiang
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LU Guang-yin
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MI Shi-wen.THE APPLICATION OF EMPIRICAL MODE DECOMPOSITION TO NON-DESTRUCTIVE TESTING OF BRIDGES[J].Geophysical and Geochemical Exploration,2013(5):951-955. |
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| Authors: | LI Guang-rui ZHU Zi-qiang LU Guang-yin MI Shi-wen |
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| Institution: | ( School of Geosciences and Info-Physics, Central South University, Changsha 410083, China) |
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| Abstract: | Empirical mode decomposition has its unique advantages in dealing with non-linear, multi-component signal. Subjected to the sampling rate and the fact that frequencies of the individual components usually lie close to each other or within an octave, each intrinsic mode function is not composed of a single frequency component. With the help of the combination effect of masking signal and sampling rate interpolation, the result of intrinsic mode functions is significantly improved relative to the traditional EMD decomposition. The im- proved decomposed intrinsic mocle functions are used to image the defects inside a concrete structure with the synthetic aperture focusing technique. The location of the defects can clearly be found, and practice has proved the feasibility of this improved method. |
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| Keywords: | empirical mode decomposition masking signal sampling rate interpolation synthetic aperture focusing technique non-de-structive testing |
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