| 基于最小值选中次数的分离谱加权算法的超声信号处理方法研究 |
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| 引用本文： | 雷华明,聂文滨,阙沛文.基于最小值选中次数的分离谱加权算法的超声信号处理方法研究[J].无损检测,2005,27(2):68-71,82. |
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| 作者姓名： | 雷华明 聂文滨 阙沛文 |
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| 作者单位： | 1. 上海交通大学,自动检测研究所,上海,200030
2. 南昌航空工业学院测控系,南昌,330034 |
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| 基金项目： | 国家“十五”863课题资助项目(2001AA602021) |
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| 摘 要： | 在脉冲式超声无损检测中，超声脉冲反射回波信号常受到电子噪声和结构噪声的干扰，信噪比往往较低。针对海底管道超声检测信号处理的问题，介绍一种基于最小值分离谱方法中最小值选中次数的统计加权算法。试验证明，该方法稳定性和信噪比较好，具有一定自适应能力。
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| 关 键 词： | 超声检验 信号处理 噪声控制 管道 |
| 文章编号： | 1000-6656(2005)02-0068-04 |
Research on the Split-Spectrum Processing Algorithm Based on Minimization Statistic Times for Ultrasonic Signal Processing |
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| LEI Hua-ming,NIE Wen-bin,QUE Pei-wen.Research on the Split-Spectrum Processing Algorithm Based on Minimization Statistic Times for Ultrasonic Signal Processing[J].Nondestructive Testing,2005,27(2):68-71,82. |
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| Authors: | LEI Hua-ming NIE Wen-bin QUE Pei-wen |
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| Affiliation: | LEI Hua-ming,NIE Wen-bin~1),QUE Pei-wen |
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| Abstract: | The signal to noise ratio (SNR) of ultrasonic pulse-echo nondestructive testing was usually low because of the disturbance from electronic and structural noises. A well-enhanced split-spectrum processing (SSP) method based on weighting algorithm according to statistical times, which was the statistical distribution of the discrete signals selected by the minimization algorithm was introduced for ultrasonic inspection of offshore oil pipeline. Experimental result showed that the method was good in stability, SNR and self-adaptation. |
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| Keywords: | Ultrasonic inspection Signal processing Noise control Pipeline |
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