心电与血氧监控系统设计..doc

摘要 心血管疾病是威胁人类健康的主要疾病之一，早期诊断和治疗是预防心脏病的有效途径。20世纪50年代末，美国科学家Holter首先发明了一种心电仪，人们称它为Holter心电仪或叫动态心电仪，这种技术在临床上可实现“长时间”、“动态”记录的心电图，就称为动态心电图。 据统计，世界上平均每年约几百万人死于此类疾病。由于心脏病的突发性，通常很多病人是未及时发现病变延误了治疗而最终导致死亡。因此，对心血管疾病的诊断、预防是当今医学必须解决的问题。因此及时、准确和完整得进行心电信号的提取以及血氧信号的检测 Abstract Cardiovascular disease is one of main diseases that threat human health．and the early diagnosis and treatment are effective ways that prevent heart disease。In the late 1950s in U.S. a scientist called Holter have invented the first such dynamic electrocardiogram instrument, people called Holter monitor or Dynamic electrocardiograph, this technology can be realized in clinical long and dynamic of ECG records, known as HOLTER. According to statistics, the worlds annual average of about millions of people died of the disease. Due to the sudden heart disease, many patients are usually not the timely discovery of disease delayed treatment and ultimately lead to death.Therefore, diagnosis, prevention of cardiovascular disease is the medical problems must be solved. Therefore, timely, accurate and complete ECG signal extraction and detection of blood oxygen signal, and provides analysis and effective diagnostic tools research subject is an important and significant. This subject uses stc12le5a60s2 single chip as the core device. The whole system mainly displays collection, storage, transport, display function for 24-hour uninterrupted ECG signal collection. Keywords:ECG signal；dynamic electrocardiogram；Holter；stc12le5a60s2singlechip；  目录 摘要 I Abstract II 目录 III 1 绪论 1 1.1课题研究意义 1 1.2国内外研究现状 2 1.3设计主要研究内容与系统总体设计 3 2 心电血氧的产生和特征 4 2.1 体表心电图 4 2.2 各波形的意义 4 2.3 心电的产生 5 2.4常见的心律异常类型及特征 6 2.5 心电信号的特征 7 2.6心电信号常见干扰 8 2.7血氧的检测 8 2.7.1血氧指标 8 2.7.2血氧测量原理 9 2.7.3影响测试性能的因素 9 3 心电与血氧检测流程设计 10 3.1 心电信号放大器设计要求 10 3.2电极的选择 11 3.3心电ADC采样流程 11 3.4血氧ADC采样流程 14 4 硬件选择及电路设计 17 4.1 中央处理器及其外围模块 17 4.1.1主控芯片的选型 17 4.1.2 ADC采样模块 18 4.1.3 定时器 19 4.2液晶显示 19 4.3心电模块电路设计 20 4.4血氧模块电路设计 21 5 实物展示 25 总结与展望 26 致谢 27 参考文献 28 附录1 29 附录2 3