便携式心音采集及处理系统的设计

发布时间：2019-06-19 20:27

【摘要】：现代经济的发展的速度远超出了人们的预想,随之而来的是人们的生活水平的提高的速度也在不断地加快中,不断进步的科技和不停改变的饮食也在一步步的改善着我们的生活方式,伴随着这些的改变,心血管疾病的患者人数也越来越多,心血管疾病甚至已经成为了威胁大部分人的一种常见的疾病,发病率也变得越来越高了。在未来,对于心血管疾病患者的治疗和诊断将会成为一个国家医疗卫生发展的重要影响因素。在对心血管疾病的各种检测手段中,心音信号是比较常见的诊断方式,心音信号中包含了大量心脏健康状态的数据信息。本文系统研究了心音信号特点,在分析了国内外相关工作的基础上,设计一款基于DSP开发的便携式可视化心音采集及处理分析系统。该系统主要分成四个部分:心音硬件采集系统,心音去噪预处理算法研究,心音自动识别算法设计及应用软件的设计。硬件采集系统主要是基于DSP处理芯片及相关硬件设计的,包括了心音传感器的选择,电源模块的设计,音频模块的设计,LCD显示模块及触摸屏模块的设计,SD存储模块。在DSP软件编程上实现了心音信号的采集和显示,触摸屏控制和数据保存的功能。心音预处理算法研究主要针对多种小波去噪算法分析处理数据,利用采集设备采集多组数据,利用算法进行处理分析,对比各种处理结果,找到最合适的去噪算法,编写心音信号的预处理的相关算法。心音自动识别算法主要对比两种心音信号包络提取算法,利用心音信号包络图对心音信号实现自动识别,定位提取S1及S2相关特征参数,设计实现心脏相关储备参数的提取分析。应用软件设计,选取LabVIEW作为开发平台,同时搭载MATLAB开发的心音处理相关算法,设计用户操作界面,便于用户操作使用。应用软件设计部分还包括数据库的设计,选用MySQL作为数据库,实现用户信息和用户心音数据的保存,同时便于用户随时调用历史数据。通过系统测试和使用,本设计完成了各模块的设计调试工作,结果表明各模块功能完整,数据有效,实现了预期目标。整体系统设计的功能比较完善,达到了系统设计预期效果。
[Abstract]:The speed of the development of modern economy is far beyond the expectations of people, and it follows that the speed of people's living standards is increasing continuously, the progress of science and technology and the constantly changing diet are improving our way of life step by step, with these changes, The number of patients with cardiovascular disease is also becoming more and more, and cardiovascular disease has become a common disease that threatens most of the population, and the incidence of cardiovascular diseases has also become more and more high. In the future, the treatment and diagnosis of cardiovascular disease patients will be an important factor of national health development. In various detection methods for cardiovascular diseases, the heart sound signal is a common diagnosis method, and the heart sound signal contains data information of a large number of heart health states. In this paper, the characteristics of heart sound signal are studied in this paper. Based on the analysis of the relevant work at home and abroad, a portable visual heart sound acquisition and processing analysis system based on DSP is designed. The system is divided into four parts: the heart sound hardware acquisition system, the heart sound de-noising pre-processing algorithm research, the heart sound automatic recognition algorithm design and the design of the application software. The hardware acquisition system is based on the DSP processing chip and related hardware design, including the selection of the heart sound sensor, the design of the power module, the design of the audio module, the LCD display module and the design of the touch screen module, and the SD memory module. The function of the acquisition and display of the heart sound signal, the control of the touch screen and the data storage is realized on the DSP software programming. The research of the pre-processing algorithm of the heart sound mainly analyzes the processing data for a variety of wavelet de-noising algorithms, uses the acquisition equipment to acquire a plurality of sets of data, carries out processing analysis by using the algorithm, compares various processing results, finds the most suitable de-noising algorithm, and prepares a correlation algorithm of the pre-processing of the heart sound signal. The heart sound automatic recognition algorithm is mainly used to compare the two kinds of heart sound signal envelope extraction algorithms, and the heart sound signal is automatically recognized by using the heart sound signal envelope graph, and the relevant characteristic parameters of S1 and S2 are extracted and analyzed, and the extraction and analysis of the relevant reserve parameters of the heart are designed. The application software is designed, LabVIEW is selected as the development platform, and the heart sound processing related algorithm developed by MATLAB is carried out, and the user interface of the user is designed to be convenient for the user to operate and use. The application software design part also includes the design of the database, the MySQL is selected as the database, the user information and the user's heart sound data are saved, and the user is convenient to call the historical data at any time. Through the system test and use, the design and debugging work of each module is completed, and the results show that the function of each module is complete, the data is valid, and the expected target is realized. The design function of the whole system is perfect, and the expected effect of the system is achieved.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN912.3;R54

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