Research Of Telemedicine Monitoring System Based On ZigBee Wireless Sensor Network

With the development of wireless sensor network technology,informationalized and intelligent remote monitor and control systems are widely used in all industries.As a very important industry in human social life,medical treatment is developing more and more informationalized.Telemedicine monitoring is a new technology based on it.The information and physical condition of patients can be accurately obtained through this technology,which is beneficial to improve the efficiency of hospital work and reduce the management cost.After the study and analysis of ZigBee networking technology,a remote medical monitoring system based on ZigBee technology as a communication mode was designed in this thesis.The system is composed of wireless sensor network nodes and upper computer monitoring system.Terminal node,router node and coordinator node are included in the wireless sensor network.The sensor module of the terminal node and the router node is composed of the temperature and blood pressure sensor chip and signal processing circuit.The CC2430 chip is used as the controller in three types of nodes,and its unique ZigBee radio frequency front end is as the communication module is served as communication module.The software program is designed in the IAR Embedded Workbench environment,and the node programming is completed according to the function of ZigBee protocol stack.The functions of wireless sensor network construction,node addition,data acquisition,data transmission and storage are realized.The communication mode between coordinator node and upper computer is rs-232 serial port and communication protocol is designed in this thesis.The access database is built on the upper computer and various information data transmitted by the node is stored in the database.Its program is written by Visual Basic language.The normal range threshold of physiological data is set in the database.The upper computer system data and its trends are drawn through the Drawline function so that each function of the monitoring system can be implemented.At the end of the thesis,the designed wireless sensor node is worn on the subject,and the test conditions are respectively different data collection frequency and different transmission distance.It is shown by the result that the designed node can form wireless sensor network and forward physiological data to the upper computer through the coordinator node,which will be displayed in the monitoring interface.Simulation analysis is carried out for the existence of multiple nodes.In conclusion,real-time remote monitoring of patients' temperature and blood pressure physiological parameter data is accomplished by the remote monitoring system designed in this thesis thus reducing patients' dependence on the fixed medical equipment in the ward.It is proved that certain feasibility and broad application prospect are owned by the system.