| 异构双核构架下的脉冲涡流信号实时小波去噪 |
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| 引用本文： | 邱选兵,魏计林,崔小朝,夏春华.异构双核构架下的脉冲涡流信号实时小波去噪[J].计算机应用,2013,33(3):866-870. |
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| 作者姓名： | 邱选兵 魏计林 崔小朝 夏春华 |
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| 作者单位： | 1.太原科技大学 应用科学学院,太原 030024;
2.山西行政学院 信息网络教研部,太原 030006 |
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| 基金项目： | 国家自然科学基金资助项目(61178067)。 |
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| 摘 要： | 针对工业现场的脉冲涡流(PEC)信号,设计了基于异构双核OMAP3530的实时嵌入式去噪的硬件与软件系统。分析了适用于实时去噪的小波基的选择,完成了基于DB4小波基的Penalty阈值法、B-M阈值法、默认阈值法的Matlab去噪仿真实验,并给出了均方根误差(RMSE)和信噪比(SNR)。结合OMAP3530硬件平台,讨论了基于DSPLINK的异构双核构架的数据共享方法,并提出一种基于固定步长滑动窗口的实时去噪算法。通过计算机仿真与实验结果表明:该系统具有信噪比高、实时性强、数据吞吐率大的优点,满足连铸现场自动检测要求。
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| 关 键 词： | 脉冲涡流 实时去噪 嵌入式操作系统 异构双核 DSPLINK |
| 收稿时间： | 2012-08-16 |
| 修稿时间： | 2012-09-23 |
Real-time wavelet denoising for pulsed eddy current signal based on heterogeneous dual-core |
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| QIU Xuanbing WEI Jilin CUI Xiaochao,XIA Chunhua.Real-time wavelet denoising for pulsed eddy current signal based on heterogeneous dual-core[J].journal of Computer Applications,2013,33(3):866-870. |
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| Authors: | QIU Xuanbing WEI Jilin CUI Xiaochao XIA Chunhua |
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| Affiliation: | 1.School of Applied Science, Taiyuan University of Science and Technology, Taiyuan Shanxi 030024, China;
2.Departement of Information Network Teaching, Shanxi Administrative Institute, Taiyuan Shanxi 030006, China |
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| Abstract: | In order to denoise the Pulsed Eddy Current (PEC) signal from industrial field, a real-time hardware and software system based on heterogeneous dual-core OMAP3530 was designed. First, how to select a wavelet basis was analyzed in the real-time process. The Matlab denoising model based on DB4 wavelet threshold method including Penalty method, B-M method and default method was established, and the Root of Mean Square Error (RMSE) and Signal-to-Noise Ratio (SNR) of the denoising model were given. With reference to the OMAP3530 hardware platform, the system software design of data sharing based on DSPLINK of heterogeneous dual-core was discussed. A real-time filtering algorithm based on fixing length step window was promoted to denoise the PEC signal. The simulation and experimental results indicate that the real-time denoising system has the features of high SNR, strong real-time and high throughput rate to satisfy the requirements of auto-testing on the casting production line. |
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| Keywords: | Pulsed Eddy Current (PEC) real-time denoising embedded operation system heterogeneous dual-core DSPLINK |
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