心电信号去噪算法研究(任务书,开题报告,外文翻译,论文9000字)
摘要
心脑血管疾病是当今威胁人类健康的三大疾病之一，心电图作为检测和诊断心脑血管疾病的重要手段，在采集过程中会受到噪声的干扰，导致医生无法准确地诊断疾病。为了准确地诊断心脑血管疾病，查阅心电信号相关资料，了解到心电噪声主要包括基线漂移、工频干扰、肌电干扰等。采用MIT-BIH心电数据库中104号数据作为纯净的心电信号，叠加模拟的基线漂移和工频干扰。然后，对中值滤波、高通滤波、曲线拟合法去除基线漂移，平滑滤波、陷波法、levkov滤波去除工频干扰各种算法的原理进行了详细的研究，设计相应的函数，编写matlab代码进行去噪仿真。对比去噪前后的心电波形，可以直观的发现每种算法的优点和缺点，分析每种算法的优缺点，从而确定每种算法各自的应用方向。
关键词：心电信号去噪基线漂移工频干扰 中值滤波平滑滤波
Research on Denoising Algorithm of ECG signal
Abstract
Cardiovascular disease was one of the current threats to human health of the three major diseases, ECG detection and diagnosis of cardiovascular disease as important means, in the acquisition process will be affected by noise interference, leading doctors were unable to accurately diagnose the disease. In order to accurately diagnose cardiovascular and cerebrovascular diseases, the ECG signal was studied. It was found that the ECG noise mainly included baseline drift, power frequency interference, EMG interference and so on. The MIT-BIH ECG database was used as the pure ECG signal, and the baseline drift and power frequency interference of the ECG signal was simulated. Then the median filtering, high pass filtering, curve fitting legitimate baseline drift removal, smoothing filter, notch filter, filter levkov removal principle of power frequency interference of various algorithms are studied in detail, design corresponding function, matlab code denoising simulation. Compared to the ECG before and after denoising, we can directly find the advantages and disadvantages of each algorithm, and analyze the advantages and disadvantages of each algorithm, so as to determine the application direction of each algorithm.
Key Words:ECG signal denoising;Baselinedrift;Power-lineinterference;Medianfiltering;Smoothing filter
目录
摘要 I
Abstract II
第一章引言 1
1.1心电信号去噪背景和意义 1
1.2心电信号的产生原理 1
1.3心电信号去噪的研究现状 2
第二章心电噪声的介绍及现阶段去除方法 3
2.1心电噪声的介绍 3
2.1.1心电信号噪声的分类及产生的原因 3
2.1.2心电噪声对诊断的影响 3
2.2现阶段去噪方法 4
2.2.1针对基线漂移 4
2.2.2针对工频干扰 5
2.3MIT-BIH心电数据库 5
第三章去除基线漂移的算法研究 6
3.1中值滤波法去除基线漂移 6
3.1.1算法原理 6
3.1.2matlab代码及仿真 6
3.2高通滤波法去除基线漂移 8
3.2.1IIR滤波器和FIR滤波器的比较 8
3.2.2切比雪夫滤波器的设计 8
3.2.3matlab代码及仿真 9
3.3曲线拟合法去除基线漂移 10
3.3.1算法原理 10
第四章去除工频干扰的算法研究 12
4.1平滑滤波法去除工频干扰 12
4.1.1算法原理 12
4.1.2matlab代码及仿真 12
4.2陷波法去除工频干扰 14
4.2.1算法原理 14
4.2.2matlab代码及仿真 15
4.3levkov滤波法去除工频干扰 16
4.3.1算法原理 16
第五章总结 18
参考文献 19
致谢 21
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