Study On Data Acquisition System Based On ZigBee Technology

Data acquisition is an important branch of information technology and is the foundation of modern measurement technology together with sensor technology, signal processing technology and computer technology.Based on the research situation of data acquisition system and the main short-range wireless communication technology,a wireless data acquisition system based on ZigBee technology which has the features of low price and low power consumption was designed and realized aiming at solving the disadvantages of high price,unease extension and poor mobility of wired data acquisition.ZigBee technology is a bidirectional wireless communication technology with the features of short distance,low complexity,low power consumption,and low bit rate.It works at 2.4GHz ISM frequency,and its transmission rate is about 20kb/s-250kb/s,So ZigBee technology is mainly applied to short distance wireless communication.Data acquisition system which combines with ZigBee technology has a wide application prospect.This thesis based on the development requirement of current data acquisition system,take industry field data acquiring as a goal,through researching on ZigBee technology(technique parameters,features,network topologies,and ZigBee2006 protocol).It using wireless single chip microcomputer CC2430 based on ZigBee technology,designs and realizes the hardware circuit of the ZigBee nodes.The hardware circuit has two parts including wireless transmitting module and testing module.The wireless transmitting module mainly accomplishes wireless data transmission.And the testing module including RS232 circuit,power circuit, keyboard circuit,and display circuit,mainly accomplishes function choice and network state detection.According to the circuit characteristics and the function requirements of the whole system,the lower computer software and the upper computer software is designed and accomplished in the research.The lower computer software including the software design of coordinator node and general terminal node in star network,realizes ZigBee star network building with the features of low power consumption and low delay.The upper software programming using Borland C++ Builder 6.0 accomplishes the function of monitoring the node state in the network including data acquiring and processing,curve-drawing,data-saving,and so on.This design is verified by field data acquisition of ZigBee terminal nodes, communication between ZigBee terminal nodes and coordinate nodes,relative parameters and networking parameters of Zigbee modules,which suggests that disadvantages of the wired data acquisition system can be overcome through the combination of Zigbee technology and data acquisition technology.