ECG 监护与抗电刀干扰算法(master)

关键词：ECG, 电刀干扰, 基线漂移, LMS 算法, 自适应滤波, 样条插值预测, 滑 动平均滤波
ABSTRACT
The main purpose of this paper is to improve the performance of the ECG monitor and increase its anti-jamming ability by means of the software approach. Toward the two main kinds of the noises: the electrosurgical interference and the baseline wander, we present the details of the algorithms, the experiment methods and the analyses of the results. The use of ESU(Electrosurgical Unit) during the surgery operation will interfere the ECG signal severely, there exists a kind of low frequency interference in the ESI(Electrosurgical Interference) that can be eliminated hardly. In the paper, a dual reference LMS adaptive noise canceller is used to deal with the ESI, which was mentioned by Widrow. At the same time, a frequency domain method was used to compute the HeartRate. This algorithm is applied to large numbers of data acquired from both the laboratory and the hospital, the result present an obvious improvement of the ECG waveform. Baseline wander is an ordinary problem in the ECG signal processing, two kinds of algorithms are used in the paper to deal with the baseline wander interference, which are the splines interpolation prediction method and the moving average filtering. The feasibilities of the methods are verified by a series of experiments and emulates during the research work, and the results are analyzed and compared with each other in the end.
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目
第一章
录
绪 论................................................................................................................. 1
§1.1 引言 ......................................................................................................................1 §1.2 研究现状及目标 ................................................................................................1 §1.2.1 抗电刀干扰研究现状 ....................................................................................1 §1.2.2 剔除基线漂移的研究 ....................................................................................2 第二章 论文背景............................................................................................................. 4 §2.1 ECG 测量原理 ......................................................................................................4 §2.1.1 心脏电传导系统 ............................................................................................4 §2.2 心电监护及其干扰 ............................................................................................. 11 §2.2.1 心电监护 ....................................................................................................... 11 §2.2.2 ECG 监护中可能存在的噪声 ......................................................................12 §2.3 本文的研究内容 ................................................................................................15 第三章 抗电刀干扰算法 .............................................................................................. 16 §3.1 电刀的工作原理 .................................................................................................16 §3.2 自适应滤波器原理及算法 .................................................................................19 §3.2.1 自适应滤波器原理 .......................................................................................19 §3.2.2 最小均方（LMS）自适应算法 ..................................................................25 §3.3 抗电刀干扰系统设计及实现 .............................................................................26 §3.3.1 自适应噪声消除器 .......................................................................................26 §3.3.2 抗电刀干扰系统设计 ..................................................................................28 §3.3.2 算法的实现 ..................................................................................................29 §3.4 频域中的心率计算方法 .....................................................................................39 §3.5 小 结...................................................................................................................41 第四章 剔除基线漂移算法 ........................................................................................ 42
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