基于USB2.0接口心电数据采集系统设计.doc

毕业设计（论文） 题目名称：基于USB2.0接口心电数据采集系统设计 年 级： ■本科 □专科 学生学号： 学生姓名： 指导教师： 学生单位：信息工程学院 技术职称：助教 讲师 学生专业：生物医学工程 教师单位：信息工程学院 基于USB2.0接口心电数据采集系统设计 摘要：心脏病是威胁人类健康的主要疾病之一，心电图就是一项常规心脏疾病检查手段，因此研制高性能的心电图机对于心脏疾病的诊断和治疗具有十分重要的意义。在数据采集系统中，USB接口以其高传输速度,简便的连接、以及其高通用性和高稳定性,比PCI、ISA、EPP/ECP等其他接口更适合与计算机的通信。因此本文在研究了心电信号的拾取、放大USB接口的心电数据采集系统。实验表明，采用该系统可以方便快捷地接入到计算机,实现对心电数据的同步采集，与配套的软件系统相结合就能让医生更全面、详尽地了解心脏的状况，有利于对心脏疾病的诊断和监测。 关键词：数据采集；USB2.0接口；即插即用 The Design of ECG data Acquisition System based on USB 2.0 Interface Abstract：The heart disease is one of the most dangerous diseases which threaten the human health, so it is very significant to develop a high performance heart examining system which can diagnose the heart trouble and cure it in time. In the data acquisition system, the USB has the advantage of high speed, simple connection, high universality and stability, and the USB technique is more compatibly used to correspond with PC than others bus, such as PCI、ISA、EPP /ECP, etc. In this thesis, some important issues and key techniques concerning acquisition and processing of ECG signals such as collecting, amplification, filter, A/D transforming and transmitting were investigate and a ECG data acquisition system with USB interface was designed and fabricated as a prototype. Experiments with testers show that the system can be easily and quickly access to your computer, and that it synchronously samples the ECG signals which permits the doctor to comprehend the heart status more completely and more thoroughly with other relevant supporting software system, and this is propitious to diagnose and inspect the heart diseases. Keywords: Data acquisition, USB2.0 interface, Plug and play 目 录 第1章 绪论 1 1.1 课题的背景及意义 1 1.2 课题发展历史及现状 2 1.3 本设计的工作 3 第2章 心电图检测信号概述 4 2.1 心电信号的特征 4 2.2 心电信号的干扰源 5 2.3 心电放大器的设计要求 5 2.4 心电双极肢体导联简介 6 第3章 心电数据采集系统的总体方案设计 8 3.1 系统的整体方案设计 8 3.2 系统的设计要求和方案选择 8 3.2.1 系统设计要求 8 3.2.2 信号转换模式的选择