| 基于HHT的涡街流量计脉动流噪声去除方法研究 |
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| 引用本文： | 彭杰纲,方敏.基于HHT的涡街流量计脉动流噪声去除方法研究[J].电子科技大学学报（自然科学版）,2012,41(2):253-258. |
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| 作者姓名： | 彭杰纲 方敏 |
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| 作者单位： | 1.电子科技大学自动化工程学院 成都 611731 |
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| 基金项目： | 国家自然科学基金(61074182);教育部博士点新教师基金(200806141058);中央高校基本科研业务费专项资金(ZYGX2009J067) |
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| 摘 要： | 采用了Hilbert-Huang变换(HHT)的方法对去除涡街计脉动流噪声进行了研究。首先运用EMD尺度滤波方式对涡街计脉动流噪声进行滤波去噪。然后,将EMD尺度滤波结果和小波阈值运用于涡街计脉动流噪声去除的结果进行了对比,离线仿真结果表明,EMD尺度滤波去噪和小波阈值去噪都能达到较好的效果,但是前者更加简便,完全是自适应的,这也为涡街信号处理提供了一种新的滤波去噪的有效方法。
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| 关 键 词： | EMD尺度滤波 Hilbert-Huang变换 小波阈值滤波 脉动流 涡街信号 |
| 收稿时间： | 2010-07-21 |
Denoising Method of Vortex Flowmeter Signal in Oscillatory Flow Based on Hilbert Huang Transformation |
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| PENG Jie-gang,FANG Min.Denoising Method of Vortex Flowmeter Signal in Oscillatory Flow Based on Hilbert Huang Transformation[J].Journal of University of Electronic Science and Technology of China,2012,41(2):253-258. |
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| Authors: | PENG Jie-gang FANG Min |
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| Affiliation: | 1.School of Automation Engineering,University of Electronic Science and Technology of China Chengdu 611731 |
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| Abstract: | In this paper, Hilbert Huang transform (HHT) method is used to reduce vortex flow meter signal noise in oscillatory flow. The empirical mode decomposition (EMD)-scales filtering is used to erase vortex flow signal noise in oscillatory flow, and then the denoising effect of EMD-scales filter is compared with that of wavelet threshold filter using vortex flow meter signal noise in oscillatory flow. The signal simulation test shows that both EMD-scales filtering and wavelet threshold filtering can achieve good results, however, the former is more convenient and completely adaptive. |
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