便携式心电遥测系统中A/D转换的实现  

Realization of A/D Conversion in Portable ECG Telemetry System

作　　者：赵正平[1] 吴小培[2] 陈蕴[1] 

机构地区：[1]阜阳师范学院计算机系,安徽阜阳236032 [2]安徽大学计算机科学与技术学院,安徽合肥230039

出　　处：《计算机技术与发展》2008年第3期207-209,213,共4页Computer Technology and Development

基　　金：安徽省自然科学基金资助项目(2006KJ086B)

摘　　要：传统的心电信号模数转换电路大多采用并行的A/D转换芯片,所以系统体积较大、功耗也大,不便于使用电池供电和随身携带。为解决上述问题提出了一种体积小、成本低、功耗低的心电信号A/D转换设计方案。在硬件电路开发设计中使用的是12位串行的A/D转换芯片MAX187,其转换速度并不慢,完全满足对心电数据采样的要求。详细地给出了AT89S51单片机与MAX187的接口以及单片机对MAX187的控制程序,具有很好的应用价值。The traditional ECG A/D conversion circuit used mostly parallel A/D conversion chip, therefore the system size, power consumption is large, does not facilitate the use of battery- powered and portable. To resolve these issues, propose a small size, low cost, low power ECG A/D conversion design. In the development of hardware circuit design using a 12 - bit serial A/D conversion chip MAX187, its conversion rate is not slow, completely satisfies to the ECG data sampling requirements. Presented microcontroller interface in detail AT89S51 and MAX187 as well a.s the control procedure, it has a good application value.

关 键 词：MAX187 A/D转换 单片机 便携式 

分 类 号：TP334[自动化与计算机技术—计算机系统结构]