| 改进的小波阈值函数在超声波无损检测信号中的应用 |
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| 引用本文： | 陈丹阳.改进的小波阈值函数在超声波无损检测信号中的应用[J].漳州师院学报,2014(2):52-56. |
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| 作者姓名： | 陈丹阳 |
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| 作者单位： | 漳州职业技术学院电子工程系,福建漳州363000 |
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| 摘 要： | 针对小波阈值降噪中,软、硬阈值函数的缺点,提出了一种改进的阈值处理函数方法.将新阈值函数用于超声检测信号去噪仿真实验中,仿真结果表明,新阈值函数能够克服软硬阈值的不足,并且选取参数N=30时降噪效果最佳.
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| 关 键 词： | 小波分析 阈值函数 信噪比 超声检测 |
Application of Improved Wavelet Threshold Function in Ultrasonic Signal Denoising for Non-destructive Testing |
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| CHEN Dan-yang.Application of Improved Wavelet Threshold Function in Ultrasonic Signal Denoising for Non-destructive Testing[J].Journal of ZhangZhou Teachers College(Philosophy & Social Sciences),2014(2):52-56. |
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| Authors: | CHEN Dan-yang |
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| Institution: | CHEN Dan-yang (Department of Electronic Engineering, Zhangzhou Institute of Technology, Zhangzhou, Fujian 363000, China) |
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| Abstract: | For shortcomings of soft and hard threshold function in wavelet threshold denoising, a new improved threshold function was presented. The new threshold function has been used in the noise reduction of ultrasonic signal in the simulation experiments. The results show that new threshold function can overcome the disadvantages of hard and soft threshold functions, and it is suggested to select the parameter of N=30 in the real application to get a better denoising. |
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| Keywords: | wavelet analysis threshold function signal-to-noise ratio ultrasonic detection |
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