Design And Implementation Of Remote Data Acquisition System Based On ZigBee

With the rapid development and population of wireless network technology,the ZigBee technology,featured as low-speed,low power,low-cost,has been widely applied in the fields of wireless sensor networks and automatic control.In this dissertation,a deep analysis and study of ZigBee have been conducted.The hardware implementation as well as the application programmer in ZigBee applications protocol layer has been proposed.The main research contents of this dissertation are recapitulated as follows:(1)The concepts of ZigBee technology,architecture and features,the conditions of applications and research,as well as inadequate are introduced.And the network topology,device type,ZigBee networks,the system framework,functions,features will be introduced too.(2)Large number of domestic and foreign related papers has been refereed to. The network layer,application layer and application framework of ZigBee structure and function were studied.The overall function of the ZigBee protocol stack structure, focused on the network,routing mechanism,data frame structure and data transfer mode,data-processing model and programming interfaces,will be analyzed.The whole programming process of the system will be elaborately demonstrated.(3)We analyze the structure of devices and hardware design ideas of ZigBee. Based on the introduction of specific processor modules,power modules,clock modules,memory modules,as well as various interface module of JN5121,the hardware design is given as well as the hardware schematics.(4)Discuss the connectivity and data exchanges between ZigBee network and Internet.Study the customization of the embedded operation system of WindowsCE.net and the application of embedded database.(5)Based on the ZigBee wireless technology,a data acquisition system is constructed and tested.The nodes used in the sensor network consist of JN5121 microprocessor and temperature and humidity digital sensor SHT10;Powerful processor S3C2440 is used as ZigBee gateway controller.Datum collected by sensor nodes will be sent to the ZigBee Gateway.ZigBee gateway transmits the datum to the remote monitoring center console via Ethernet network,and an analysis of the experiment results could be carried out.The experimental results show that the formation of the system with good stability is convenient,and can be widely used in industry.