Design And Implementation Of The Zigbee-based Body Sensor Network System

Since continuously, patients accept the medical care in hospital by using the traditional way. But this approach not only takes up the limited medical resources, but also brings lots of inconvenience to patients and the hospital due to the complex wire connection between patients and equipments. Furthermore, in China the aging phenomenon is becoming more severe. How to make the elderly get medial care timely and convenient, enjoy more health care resources as much as possible, even at home can enjoy comprehensive medical services, these have become the common focus of society and medical area.. To solve these problems, the technology by use of the wireless communication combined with the body sensor is emerged, and recently, it has become a hotspot.This thesis has accomplished these tasks listed as follows:(1) First, this thesis describes the Zigbee wireless communication technology and compares this with other mainstream wireless technology, demonstrates the feasibility of applying the Zigbee to the wireless remote medical care.(2) Then establishes a wireless body sensor network based on Zigbee. And a wireless people healthy monitoring experimental system has been designed on the basis of the network. This system proposes a network architecture which using the pulse and body temperature sensors as child nodes, then combine the coordinator to form a scalable architecture, and using the wireless RF chip CC2430 based on Zigbee standards to complete the data collection and transmission.(3) The design not only gives a detail description on the whole architecture of the system, but also does some optimization works on the system problems. Since the design of the hardware electric circuit follows the principles:simplity, resonablity, chip and I/O resources saving and strong anti-interference, thus not only saves cost but also improves data collection accuracy. The real-time data are displayed in the main node by the comport debugger software. (4) The algorithm design to use the senor to collection data, it strictly conform to the sensor transmit protocol. And by using the digital filter to process the collected pulse data, the system reduces the impacts caused by the interference of noise and power. Because of the comport debugger assistant is programmed by Visual C++6.0 and embedded into a virtual oscilloscope class, the received data can be observed more directly, thus makes the monitoring software more functional and comprehensive.