基于STM32的智能健康监测手环

摘  要

随着科技的飞速发展，人民的生活质量得到极大改善，同时人们对自身的健康状况更加关注。因此，需要设计了一款基于STM32的智能手环系统，其可显示步数、心率、温度、血氧等数据，使人们更快更好地实时了解健康情况。

本次设计的智能健康监测手环主要组成是STM32单片机电路、ADXL345加速度传感器、心率血氧检测电路、OLED液晶显示电路、电源电路、时钟DS1302和DS18B20温度传感器组成。通过ADXL345测量重力加速度，是用来判断人体状态，根据状态的数值变化进行计步功能。通过心率血氧传感器测试，通过手指脉动放大经过比较器处理后发送给单片机进行心率血氧采集。并将步数、心率血氧，温度、时间显示在液晶LCD1602上，并且我们也可以通过蓝牙把当前的数据发生到手机端进行显示，这样也方便陪练人员随时观察运动者状态。本次设计系统价格成本较低，功能比较全面，具有良好的市场前景。

本文着重介绍了智能健康监测手环的原理、整体设计方案、硬件选择、软件设计等。结果表明，本文设计的智能健康监测手环具有成本低，操作简便，稳定性较好等特点。

关 键 词：STM32；健康监测手环；DS18B20温度传感器；计步器；液晶显示

ABSTRACT

With the rapid development of science and technology, the quality of people's life has been greatly improved, and people are paying more attention to their health conditions. Therefore, it is necessary to design an intelligent bracelet system based on STM32, which can display data such as step number, heart rate, temperature, blood oxygen, etc., so that people can understand the health condition faster and better in real time.

The design is mainly composed of STM32 microcontroller circuit, ADXL345 acceleration sensor, heart rate blood oxygen detection circuit, OLED liquid crystal display circuit, power circuit, clock DS1302 and DS18B20 temperature sensor. Through ADXL345 measurement of gravity acceleration, is used to judge the state of the human body, according to the state of the numerical change of the step function. After heart rate and blood oxygen sensor test, finger pulsation amplification is processed by comparator and sent to single chip microcomputer for heart rate and blood oxygen collection. The number of steps, heart rate, blood oxygen, temperature and time are displayed on the LCD LCD1602, and we can also display the current data to the mobile phone through Bluetooth, which is convenient for the sparring staff to observe the status of the athletes at any time. This design system price cost is low, the function is more comprehensive, has a good market prospect.

This paper mainly introduces the principle, overall design scheme, hardware selection and software design of intelligent health monitoring bracelet. The results show that the smart health monitoring bracelet designed in this paper has the characteristics of low cost, simple operation and good stability.

KEY WORDS: STM32; Health monitoring bracelet; DS18B20 temperature sensor; A pedometer; Liquid crystal display