心電信號處理關(guān)鍵技術(shù)的研究與實現(xiàn)
[Abstract]:According to the investigation, the death toll caused by cardiovascular disease accounts for 1/3 deaths in the world every year and the incidence rate is increasing year by year. The population is getting younger and has become the first major disease that seriously endangers human health. Because of the sudden and irregular characteristics of cardiovascular disease, prevention and timely detection are the key steps in the treatment of cardiovascular disease. Myocardial ischemia, angina pectoris and other diseases show arrhythmia waveform on electrocardiogram, so the study of ECG signal processing algorithm and ECG monitoring system for arrhythmia is of great significance for saving lives. In view of the shortcomings of the current algorithms of arrhythmia signal processing, analysis and intelligent diagnosis, this paper studies the key technologies of ECG signal pretreatment (denoising), waveform detection and abnormal waveform classification, etc. The ECG monitoring and analysis diagnosis system which is applied by the algorithm is also discussed. The main contents are as follows: (1) aiming at the noise problems of power frequency, baseline drift and electromyography interference in ECG signal, an improved Notch filter is designed in this paper. An adaptive morphological filter structure and stationary wavelet threshold denoising algorithm for ECG preprocessing. The simulation results show that the preprocessing algorithm is better than other classical filtering algorithms. (2) aiming at the problem of irregular ECG waveform detection, This paper presents an ECG P-QRS waveform detection algorithm based on biorthogonal spline wavelet filter banks and LS estimation to detect the position and width of QRS and P waves. In this algorithm, biorthogonal spline wavelets are constructed to decompose ECG signals, and at the third and fourth scales, the mode-maximum pairs corresponding to the peaks of R and P waves are detected to locate the peaks of R and P waves. The width of QRS wave and P wave is determined by LS estimation. The simulation results show that the detection accuracy of R wave and P wave is higher than that of the contrast algorithm. (3) aiming at the problem of arrhythmia waveform classification in ECG signal, an improved KNG-FCM arrhythmia classification algorithm is proposed in this paper. The improved K-means, Gao Si kernel function and granularity principle are used to improve the robustness and noise sensitivity of the traditional FCM algorithm. The simulation results show that the classification accuracy of the proposed algorithm can reach 98.86, which is better than the comparison algorithm. (4) aiming at the shortcomings of the existing ECG monitoring scheme, a dynamic ECG monitor is proposed. The ECG monitoring system composed of ECG intelligent analysis software can realize the remote monitoring and intelligent analysis diagnosis of dynamic ECG.
【學位授予單位】:東北大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TN911.7;R540.41
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