摘要：心电图是检测心脏疾病比较简单高效的方法，目前的心电图设备设计复杂、体积庞大、价格高昂并且只有专业的医务人员才能解读其数据，操作难度较大。心电监测设备还没有便携到像体温表、血压计一样随时可以使用，要想做心电检查还是得去医院才行。本系统设计的是以C8051F005单片机为核心的心电数据采集设备。人体的心电信号由心电导联线采集，经过放大电路与滤波电路的处理后由C8051F005控制心电信号的采集与传输。C8051F005将采集到的心电参数保存至TF卡，并通过USB接口或无线信号发送模块将数据传输给手持PDA设备，由PDA设备上运行的软件对心电数据进行分析、处理和显示。手持PDA设备上预设的软件运用心电信号处理算法将心电数据进行数字滤波和波形提取，最终将心电波形显示在设备的屏幕上。经测试，本系统能实时地检测人体的心电信号，并通过PDA设备将心电图实时显示出来。便携式的心电监测系统使患者足不出户就可以方便快捷的进行心电监测，有利于提前预防和及早诊断部分心脏病。65429

毕业论文关键词：心电监测，便携式，C8051F005，PDA

Abstract: ECG (electrocardiogram) is a simple and efficient method for detecting heart disease. The traditional ECG equipment has complicated designs, great bulk and high price. The ECG data only professional medical personnel can understand. The ECG monitoring equipment has not been like the thermometer or the sphygmomanometer which can be used whenever you want. People must go to the hospital for ECG examination. This system is based on C8051F005  as the core of ECG data acquisition device. The ECG signal was collected through the dedicated leads from our body surface. The amplifying circuit and the filter circuit take the ECG signal to the AD converter which is built in the MCU. After finishing converting, the MCU will send the ECG data to the PDA (Personal Digital Assistant) through the UART or the wireless module. The software running on the PDA will analyze the ECG data and use the dedicated algorithm for digital filtering and waveform extraction. Finally the software will display the ECG waveform on the screen of the PDA. After testing, the system can detect the real-time ECG signal, and display it on the screen of the PDA. People keeping in doors can take ECG examination through portable ECG monitoring system. This is in favor of protecting against some heart disease.

Keywords: ECG, portable, MCU, C8051F005, PDA　

目录

1 绪论 4

1.1 课题的研究背景和意义 4

1.2 心电研究历史及国内外研究现状 4

1.3 课题研究的主要内容 5

1.4 论文主要工作 5

2 心电图 6

2.1 心电导联结构体系 6

2.2 心电信号的产生 9

2.3 心电图各波段的组成含义与心电活动 10

2.4 心电信号的特点 11

3 便携式心电监测系统的硬件设计 11

3.1 模拟信号电路设计 11

3.2 数字信号电路设计 16

3.3 电源电路设计 18

4 便携式心电监测系统的软件设计 20

4.1 单片机软件设计