简易心电图仪设计(课程设是计).docVIP

电子综合实践设计报告 PAGE  PAGE 12 重庆理工大学 《生物医学工程》课程设计报告 题目： 简易心电图仪的设计 班 级：生物医学工程11级学 号：111100401姓 名：钟茂娇指导老师：周奇、陈国明日 期：2014年9月 摘 要 心电图是临床疾病诊断中常用的辅助手段。心电数据采集系统是心电图检查仪的关键部件。人体心电信号的主要频率范围为0.05Hz~100Hz，幅度约为0~4mV，信号十分微弱。由于心电信号中通常混杂有其它生物电信号，加之体外以50Hz工频干扰为主的电磁场的干扰，使得心电噪声背景较强，测量条件比较复杂。为了不失真地检出有临床价值的干净心电信号，往往要求心电数据采集系统具有高稳定性、高输入阻抗、高共模抑制比、低噪声及强抗干扰能力等性能。本设计利用集成仪表放大器AD620和滤波电路设计了一种符合上述要求的简易心电图仪。 关键词：心电图 干扰 AD620 滤波 Abstract Electrocardiogram is commonly used in clinical disease diagnosis of auxiliary means. Ecg data acquisition system is electrocardiogram checking of the key components. The main body ecg signal frequency range is 0.05 Hz ~ 100Hz, amplitude is approximately 0 ~ 4mV, signal is very weak. Because electrocardiosignal usually mingled with other biological signals, coupled with the in vitro in 50Hz power frequency interference of electromagnetic interference, mainly making ecg noise background stronger, measuring conditions are complex. In order not to distortion to detected with clinical value of ecg signal, clean often ask ecg data acquisition system with high stability, high input impedance, high common mode rejection ratio, low noise and strong anti-jamming ability, such as performance. This design using integrated instrumentation amplifier AD620 and filter circuit design a kind of to satisfy the above-mentioned requirements of simple ecg apparatus. Keywords: electrocardiogram interference AD620 filtering 目 录  TOC \o 1-3 \h \z \u  HYPERLINK \l _Toc281163187 摘 要  PAGEREF _Toc281163187 \h 2  HYPERLINK \l _Toc281163188 Abstract  PAGEREF _Toc281163188 \h 3  HYPERLINK \l _Toc281163189 目 录  PAGEREF _Toc281163189 \h 4  HYPERLINK \l _Toc281163190 1、设计要求  PAGEREF _Toc281163190 \h 5  HYPERLINK \l _Toc281163191 2、方案设计  PAGEREF _Toc281163191 \h 6  HYPERLINK \l _Toc281163192 2.1 理论分析及芯片选用依据  PAGEREF _Toc281163192 \h 6  HYPERLINK \l _Toc281163193 2.2设计方案论证  PAGERE