摘 要
随着社会的飞速发展，人们的生活方式和膳食结构发生了巨大的变化，与此同时，人类因各类突发性疾病的死亡率逐年提高，心血管疾病已成为威胁人类健康的多发病，而且发病率逐年提高，发病年龄也出现下降趋势。心脏病是人们难以预防的突发性疾病，所以自身的健康也被越来越多的人所重视。本设计要解决的就是可以测量心率，预防心脏病等心血管方面的疾病的心跳监控系统。
本设计采用以AT89S52单片机为核心控制器件的低成本、高精度、体积小的数字显示的心率计。心率监控系统的工作原理是利用SC0073型压电传感器接收到人体信号，通过电路中的放大电路将信号放大、整形处理，最后再传给单片机AT89S52处理，处理完成后由三位数码管显示出来。整个监控系统采用模块化设计，由主程序、预置子程序、信号采集子程序、信号放大处理子程序、显示子程序等模块组成。传感器探头采集的信号经单片机分析处理，实现心率测量的功能。在此基础上设计了心跳监控系统的总体方案，通过硬件和软件来实现各个功能模块。
该心跳监控系统可以便捷的测量出人体的心跳，基本实现预定的目标，大大降低测量心跳的时间，且方便携带。
关键词：AT89S52；SC0073；心率；监控系统
Abstract
With the rapid social development, people's lifestyle and dietary structure has
changed a great deal, at the same time, because of the sudden illness of human
mortality is also more and more high, cardiovascular disease has gradually become
the frequently-occurring disease threatens human health, and incidence increased year
by year, the age also drop. People are hard to prevent heart disease of sudden disease,
so their health is also more and more people pay attention to. This design to solve is
can measure heart rate, prevent heart disease and other cardiovascular diseases of the
heart monitor system.
This design uses the AT89S52 SCM as the core to control device of low cost,
high precision, small volume of digital display of heart rate plan. Heart rate monitor
system uses SC0073 piezoelectric sensors to receive the human body signals, through
the circuit of the amplifier circuit will amplification, plastic processing, and finally to
to monolithic integrated circuit AT89S52 treatment, after the completion of the three
digital pipe by the display. The whole monitoring system uses modular design, the
main program, preset subroutines, signal acquisition procedure, amplification
processing procedure, display subroutines etc module. Sensor probe acquisition of the
signal analysis and processing of SCM, realize the function of the heart rate
measurement. Based on this design heart beat the overall scheme of the monitoring
system, through the hardware and software to achieve each functional modules.
The heart rate monitor system can be convenient measure the human heartbeat,
basic for achieving the goal, and greatly reduce measuring the heartbeat of time, and
easy to carry.
Key Words: AT89S52；SC0073；heart rate；monitor system
目 录
1 引言.......................................................................................................................... 1
2 总体设计.................................................................................................................. 3
2.1 心跳监控系统原理 ......................................................................................................... 3
2.2 总体电路框图设计 ......................................................................................................... 3
3 元器件的选择及其功能介绍................................................................................. 5
3.1 单片机AT89S52 .............................................................................................................. 5
3.2 低功率运算放大器LM324N ............................................................................................ 8
3.3 SC0073 微型动态脉搏微压传感器 ............................................................................... 9
3.4 数码管 ........................................................................................................................... 10
4 系统硬件设计........................................................................................................ 12
4.1 单片机最小系统 ........................................................................................................... 12
4.1.1 复位电路 ........................................................................................................... 12
4.1.2 振荡电路 ........................................................................................................... 13
4.2 心跳信号采集电路 ....................................................................................................... 13
4.3 滤波电路 ....................................................................................................................... 14
4.4 信号比较电路 ............................................................................................................... 15
4.5 报警电路 ....................................................................................................................... 16
4.6 显示电路 ....................................................................................................................... 17
4.7 系统总体设计原理图 ................................................................................................... 18
5 软件设计................................................................................................................ 19
5.1 主函数 ........................................................................................................................... 19
5.3 显示模块 ..................................................................................................................... 22
5.4 计数模块 ......................................................................................................................... 24
6 系统仿真................................................................................................................ 25
6.1 单片机部分仿真 ........................................................................................................... 25
6.2 信号采集部分调试 ....................................................................................................... 25
参考文献...................................................................................................................... 27
附录1 系统原理图................................................................................................... 28
附录2 总程序........................................................................................................... 29
附录3 毕业设计作品说明书................................................................................... 32
