便携式心率监测仪的设计

便携式心率监测仪的设计

目录

绪论 (1)

1 系统统方案设计 (2)

1.1 系统功能要求 (2)

1.2 医学常识 (2)

1.3 系统方框图 (3)

2系统硬件设计 (5)

2.1 单片机介绍 (5)

2.1.1 AT89C2051主要性能 (5)

2.1.2 AT89C2051的引脚说明 (6)

2.2 传感器与信号处理电路的设计 (7)

2.2.1 光电式脉搏波传感器 (7)

2.2.2 前置放大与滤波电路 (8)

2.3 显示电路 (10)

2.3.1 ULN2003的功能 (10)

2.3.3 显示电路接口设计 (10)

2.4 报警电路 (11)

2.5 时钟和复位电路设计 (11)

2.5.1 时钟电路设计 (11)

2.5.2 复位电路的设计 (12)

3 软件设计 (13)

3.1 中端程序流程图 (13)

3.1.1 定时器中断程序流程图 (13)

3.1.2 INT中断程序流程图 (14)

3.2 显示程序流程图 (15)

4 调试与仿真 (16)

4.1 仿真软件 (16)

4.2 调试仿真中注意的问题 (16)

结论 (17)

参考文献 (18)

附录A 心率监测仪电气原理图 (19)

附录B 部分源程序 (20)

致谢 (25)

便携式人体心率监测仪的设计

摘要

多年来，心率监测仪在心血管疾病的研究和诊断方面发挥出显著的作用，它们所记录的心脏活动时的生物电信号，已成为临床诊断的重要依据。目前，检测心率的仪器虽然很多，但是能像本文设计的系统一样实现精确测量、便于携带、报警等多种功能的便携式全数字心率测量装置却不多。

本系统以AT89C2051单片机为核心控制芯片，光电式脉搏波传感器采集信号，以七段数码管作为显示系统，经信号处理电路后脉冲送入单片机，由数码管显示心率。本文设计的人体心率监测仪使用方便，只需将手指端轻轻放在传感器上，即可实时显示出每分钟脉搏次数，特别适合体育训练和外出旅游等场合使用。采用红外光学检测法，能够在运动的状态下进行心率测量。该系统运行稳定，实时性强，安全可靠，系统通用性好，移植、扩展方便，同时具有功耗低，体积小，操作简单，便于随身携带等特点，适合家庭和社区医疗保健使用，对心血管疾病的早期诊断具有重要的意义。

【关键词】：心率监测单片机数码显示

The Design of Portable Heart Rate Monitor

Abstract

For many years, the heart rate monitor has played a significant role in research and diagnoses of cardiovascular diseases. Biological signals of cardiac activity recorded by the heart rate monitor have become important basis of clinical diagnosis. At present, there are a lot of instruments of detecting heart rate, but there is a little portable digital heartbeat measurement device the same as the system in this paper with various functions such as accurate measurement, easy to carry and alarm .

The system adopts AT89S52051 microcontroller as core control chip, photoelectric pulse wave sensor for data acquisition, seven-segment digital tubes as the display system. Through signal processing circuitry, the pulse is directed to the microcontroller, displaying heart rate by digital tubes. The human heart rate monitor designed in this paper is easy to use, just lightly putting a finger on the sensor side which can display real-time pulse rate per minute, especially for sports training and travel and so on. The method of infrared optical detection is able to measure the heart rate in motion state. The system is stable, strong real-time, safe and reliable, universal and easy to transplant and expand. Also it has low power consumption, small size, simple operation, easy to carry and so on. It is suitable for family and community medical health care which has the vital significance to early diagnosis of cardiovascular diseases.

【Key words】heart rate monitoring MCU digital display