本科毕业论文--电话传输心电信号的数字脉宽调制法研究.docVIP

【摘要】介绍一种通过电话线传输心电信号的系统。该系统由患者随身携带盒、公用市话网以及医院接收系统组成。患者随身携带盒具有体积小、成本低、可靠性高、便于携带的优点。心脏病患者可利用固定电话或手机，通过电话网络，随时将所记录的心电信号传给医院，具有机动灵活的特点，既弥补了心电图的不足，又实现了实时监护，携带这种装置的用户可以定期通过电话向医院监护中心传送自己的心电信号，也可以在病情紧急时亲自或由他人协助将心电信号及时传送到医院，医护人员将及时获得病人发病时的心电信号，对其进行实时分析，并对病人进行指导治疗，为及时抢救赢得宝贵时间，亦可以用于医院中对心脏病患者住院或出院后的随访诊断。本文详细介绍了系统结构、对心电信号预处理、硬件工作原理，系统与市话网之间信号的传输采用脉宽调制法，便于推广与应用。 【关键词】：心电信号 心电信号预处理 数字脉宽调制法 【Abstract】In this paper, a transmitting system of ECGs through public telephone is introduced, which is made up of protable ECG recoder, public telephone network and hospital receiving system. The protable ECG recorder has such excellences as small volume, low cost, high reliability and protability. Heart disease patients can use a fixed telephone or cell phone through the telephone network, Keep records of the hospital ECG transmission, Mobile features, ECG is compensated for the shortcomings, real-time monitoring, carry such a device users will be able to regularly by telephone to the hospital monitor their transmission center ECG , Also in patients with an emergency personally or by the help of others will be promptly transmitted ECG to the hospital, Staff will receive timely onset of the ECG, its real-time analysis and treatment of patients know, won for the timely rescue valuable time can be used in hospitals for heart attack patients hospitalized or discharged for follow-up after diagnosis. This paper describes the system structure of the ECG signal preprocessing and hardware working principle, System and local call between signal transmission pulse width modulation method used to facilitate the promotion and application. 【Keyword】: ECG ECG pretreatment Digital Pulse Width Modulation 【摘要】 I 【Abstract】 II 1．绪论 1 1.1 概述 1 1.2 心电生理学基础 1 1.3 远程医疗的研究现状 3 1.4 心电图自动分析与诊断的发展 4 1.5 本文的研究内容 5 2．总体设计方案 7 2.1 电极 7 2.2 心电图导联 7 2.3 系统设计要求 8 2.4 系统结构框图 8 2.5 系统设计原理 9 2.6 系统需解决的问题 9 3．心电信号预处理 10 3.1 50Hz陷波器的设计 11 3.1.1 双T网络的频率响应 12 3.1.2 有源双T带阻滤波电路分析 13 3.1.3 中心频率为50Hz陷波器的具体设计 14 3.1.4 运算放大器选择