摘  要： 目前心率计已经广泛的应用于我们的日常生活中,通常被用于保健中心和医院，通过测量心率来检查人体健康。本系统设计的是一种基于51单片机STC89C52的心率计，这会使得测量心率更为简易，同时也更加精确。该系统首先利用光电传感器产生脉冲信号，然后通过信号采集电路将信号进行放大并且改变其形状，再通过单片机操作，从而测量出人体心脏的跳动次数，并且最终把心跳的次数和时间显示在液晶屏LCD1602上[1]。该系统除了可以测量出用户当时的心率，同时还可以设置心率的最大值和最小值，当测量出的心率值超过这个值的范围时就会驱使蜂鸣器发出报警信号。经过测试，系统达到了设计的各项要求，能够独立运行。

该论文有图10幅，参考文献7篇。

关键词：心率计 STC89C52  光电传感器  LCD液晶屏 

The design of the heart rate meter based on 51 single chip microcomputer

Abstract：At present, the heart rate meter has been widely used in our daily life. It is usually used in health centers and hospitals to detect human health by measuring heart rate. This system is designed based on the 51 microcontroller STC89C52 heart rate meter, which makes the measurement of heart rate is more simple and more precise. The system first uses the photoelectric sensor to produce the pulse signal, then amplifies the signal through the signal acquisition circuit and changes its shape. Then the single chip microcomputer is operated to measure the beat times of the human heart, and finally the times and time of the heartbeat are displayed on the liquid crystal screen LCD1602 [1]. In addition to measuring the heart rate at the time of the user, the system can also set the maximum and minimum of the heart rate. When the measured heart rate exceeds the range of the value, the buzzer will be driven to send out the alarm signal. After testing, the system meets the design requirements and can run independently.

The paper has 10 drawings and 7 references.

Key Words: heart rate measuring instrument  STC89C52  photoelectric sensor lcd liquid crystal screenr

目  录

摘  要 1

ABSTRACT 2

1 绪论 4

1.1 心率计的研究目的及意义 4

1.2 当前研究现状 4

2 总体方案的选择 5

2.1主控模块的选择 5

2.2显示模块的选择 6

2.3传感器的选择 6

2.4时钟芯片的选择 6

3 系统硬件设计 7

3.1主控模块的设计 7

3.2 LCD液晶显示模块的设计 7

3.3键盘模块的设计 8

3.4蜂鸣器模块的设计 8

3.5信号采集电路的设计 9

3.6时钟模块的设计 9

4 系统软件设计 11

5 系统调试 12

5.1 软件调试 12

5.2硬件调试 12

5.3调试结果 12

6 结论 14

参考文献 15

致谢