Software and hardware implementation of home electronic medical box

1. Project Overview

1.1 Introduction

This idea came to me in an instant, and I wanted to realize it.

1.2 Project Background/Motivation for Topic Selection

With the development of social economy, people's living standards are getting higher and higher, and people are now paying more and more attention to the quality of life and health issues. The development of electronic products has provided people with such a way, such as various portable medical devices. But we found that the functions of these medical devices are relatively simple and most of them need to use sensors. So we came up with such an idea: Can we use a single-chip microcomputer to make an electronic medical box? This medical box can realize multiple functions, such as using a body temperature sensor to measure body temperature at the same time, and using a temperature and humidity sensor to measure indoor temperature and humidity at the same time. It can also use other functions such as measuring weight, blood pressure, heart rate, etc. at the same time or in different time periods. This medical box is based on sensors, and different functions need to be replaced with corresponding sensors. This medical box can also make it convenient for people to pay attention to their own health problems and meet people's other needs.

The idea of ​​our design is to make this product more functional to meet people's different needs. Of course, this design cannot include many sensor applications, as time and energy are limited, but the idea expressed by this design must be very clear. We decided to design a few sensors, one is the body temperature sensor, the second is the temperature and humidity sensor, and the third is the pressure sensor. We believe that this design has great potential, for example, it can be integrated into mobile phones or electronic watches.

This electronic medical box can realize multiple sensor applications, so it is not only suitable for people's daily life, but also can be used for sensor teaching to make the teaching image vivid, thus achieving a better teaching effect.

2. Demand Analysis

2.1 Functional requirements

The buttons control the corresponding sensor channels, the corresponding channels work, the sensors collect signals, the signals are processed and sent to the processor, the processor further processes the signals and sends them to the display. The most important thing is to work stably.

Figure 1 System architecture

2.2 Performance requirements

It has the characteristics of portability and low power consumption, and can also connect and use a variety of sensors and work stably.

3. Solution Design

3.1 System Function Implementation Principle

The button determines which line to use. When the button is pressed, the corresponding sensor works to collect signals. If the sensor integrates digital conversion, the signal is directly transmitted to the processor. If the sensor does not integrate digital conversion, the signal is amplified first and then converted from analog to digital and transmitted to the processor. After receiving the signal, the processor starts processing and finally displays the result.

Figure 2 System hardware structure diagram

3.2 Hardware platform selection and resource allocation

We chose the AVR XMEGA-A1 X plained platform for this design, and of course it would be better if there is a matching daughter board. It also includes pressure, temperature and humidity SHT7x, and body temperature sensors.            [page]

3.3 System Software Architecture

Program operation flow chart

3.4 Expected Results of the System

The system is expected to be able to measure body temperature, weight, and indoor temperature and humidity.