Real-time wavelet denoising for pulsed eddy current signal based on heterogeneous dual-core

doi:10.3724/SP.J.1087.2013.00866

Journal of Computer Applications ›› 2013, Vol. 33 ›› Issue (03): 866-870.DOI: 10.3724/SP.J.1087.2013.00866

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Real-time wavelet denoising for pulsed eddy current signal based on heterogeneous dual-core

QIU Xuanbing¹, WEI Jilin1, CUI Xiaochao^1*, XIA Chunhua²

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

Received:2012-08-16 Revised:2012-09-23 Online:2013-03-01 Published:2013-03-01
Contact: QIU Xuan-Bing

异构双核构架下的脉冲涡流信号实时小波去噪

邱选兵¹,魏计林¹,崔小朝^1*,夏春华²

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

通讯作者: 邱选兵
作者简介:邱选兵(1980-),男,四川内江人,讲师,博士研究生,主要研究方向:材料无损检测、嵌入式系统、信号处理; 魏计林(1957-),男,河北深县人,教授,主要研究方向:嵌入式系统、光学; 崔小朝(1962-),男,山西临汾人,教授,博士生导师,博士,主要研究方向:计算流体力学、工程应用、高效连铸; 夏春华(1958-),男,山西太原人,副教授,主要研究方向:嵌入式系统。
基金资助:
国家自然科学基金资助项目(61178067)。

Abstract

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.

Key words: Pulsed Eddy Current (PEC), real-time denoising, embedded operation system, heterogeneous dual-core, DSPLINK

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。

关键词: 脉冲涡流, 实时去噪, 嵌入式操作系统, 异构双核, DSPLINK

CLC Number:

TN911
TP368

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(03): 866-870.

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(03): 866-870.

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Real-time wavelet denoising for pulsed eddy current signal based on heterogeneous dual-core

异构双核构架下的脉冲涡流信号实时小波去噪

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