Remote medical monitoring system based on Black

Intelligent hardware physiological monitoring based on BB-Black

This article takes BeagleBone Black as the core, attaches ZigBee wireless sensor node and GSM/GPRS module; establishes web server and SQLite database, receives, parses and stores physiological data collected by ZigBee node, controls GSM/GPRS for emergency call and text message; Make the hardware intelligent and provide automatic physiological monitoring to facilitate people's lives.

At present, the main defects of medical equipment are expensive, bulky and non-intelligent. With the development of technology, many optimized intelligent medical equipments have emerged in recent years, which has greatly facilitated people's lives. However, there are still defects such as single function and remote access.

The BB-Black development board is widely used in various scenarios due to its low price and powerful functions. How to use BB-Black to design a smarter and more complete real-time remote medical monitoring system will be a meaningful and promising market. Research topics.

1. Application system overall structure design description 1.1 Hardware platform related introduction

The design involves three hardware modules: BB-black, ZigBee and GSM/GPRS. The BB-black development board is a core module, which is a development kit based on the AM3359 processor. The physical map is shown in Figure 1. The processor integrates an ARM Cortex-A8 core up to 1 GHz and provides a rich peripheral interface and two expansion interfaces to extend interfaces such as LCD, UART, eMMC, ADC, I2C, SPI and PWM. Its system block diagram is shown in Figure 2.

The AM3359 is an ARM Cortex-A8 core-based microprocessor that enhances graphics, graphics processing, peripherals and industrial interface options such as etherCAT and PROFIBUS, and supports advanced operating systems such as Linux, WinCE and Android. The processor contains multiple subsystems. The microprocessor unit (MPU) subsystem is based on the ARM Cortex-A8 microprocessor; the POWERVR SGX graphics acceleration subsystem is used for 3D graphics acceleration to support display and gaming effects; the programmable real-time unit subsystem (PRUSS) allows users to create A digital resource that goes beyond local peripherals. In addition, PRUSS is independent of the ARM core, which allows the device to have independent operation and clocking, giving it greater flexibility in complex system solutions.

Figure 1 BB-black physical map back (left), front (right)

Figure 2 BB-Black system block diagram 1.2 system function module and information processing process

The function module of the system is shown in Figure 3, which is mainly composed of four parts: data acquisition module, GSM module, remote login module and BB-Black module. The physiological data module uses ZigBee wireless sensor node to collect user physiological data in real time; the GSM module uses quad-band GSM/GPRS to realize emergency alarm and positioning; the remote login module refers to mobile phone or other Internet access device for remote access and monitoring by users; BB- The Black module is the core module of the system, which can be divided into three parts: data processing, Boa server and SQLite database. The data processing module realizes receiving and parsing data, inserting data into the SQLite database, and issuing emergency alarm commands to the GSM module; the SQLite database is mainly used for storing physiological data; and the Boa server is realizing remote access of the user to query physiological data stored in the SQLite data. .

Figure 3 system function module block diagram

As shown in the figure above, the information processing process of the system is as follows:

1. The physiological data acquisition module collects physiological data in real time.

The user can carry the corresponding physiological data detection module (such as blood pressure, blood sugar, pulse and other detection modules) as needed, and move and real-time physiological data collection within the coverage of the wireless sensor network established by BB-black, according to IEEE 802.15.4 The communication standard transmits the physiological data packet through the wireless network; the ZigBee terminal node connected on the BB-black development board receives the data packet.

2. The BB-black module receives, analyzes and processes physiological data.

The AM335x processor periodically reads the data packet received by the terminal node, parses the physiological data in the data packet, and stores it in the SQLite database, and analyzes the data according to the health indicator. In case of emergency, the GSM/GPRS module is sent to the GSM/GPRS module. Send an AT control command to make an emergency call.

3. The guardian or doctor can access the server anytime, anywhere to view and manage the recent physiological data of the ward.

The user can log in to the Boa server through the Internet device and submit a query form to access the physiological data of the custodian stored on the SQLite, so as to realize the remote physical condition of the ward and realize remote monitoring.

The application scenario of this system can be as shown in Figure 4.

Figure 4 system application scenario diagram

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