Design Of Wireless Data Acquisition System Based On ZigBee

Nowadays, wireless sensor networks has gradually mature with the rapid development, which attracts more and more attentions in the front edge technology. IEEE 802.15.4/ZigBee technology, proposed by IEEE organization and the ZigBee alliance, which is a new short-range wireless communications technology with characteristics of low rate, low power consumption and low cost. It effectively compensates for the low speed wireless communication market's vacancy, is suitable to use in remote control and automatic control field.This paper is completed the design of wireless data acquisition system based on ZigBee, hardware and software design. The system has network coordinator, routers and sensor nodes, the uses of 2.4GHz RF chips for wireless communications. Under the precondition of the application in data acquisition system, we firstly analyze and compare the advantages and disadvantages between traditional wire data acquisition and several popular related short-ranged wireless technology standards, and we think that ZigBee is more suitable for data acquisition system. It expounds some key points in the manner of building ZigBee networks, like the establishment and maintenance of networks, the flow of device joining the networks.The hardware platform of wireless data acquisition system used TI company's CC2430 chip and low power amplifier CC2591 chip for wireless communication as control module, the temperature sensor TC77 and light sensor as the main periphery connection device. Deep research the structure and function of ZigBee each layer.The simplify ZigBee protocol stack is modified and planted, and the appliacations and related drivers are grammed. Moreover, it designed and realizes a mini start network and cluster-tree network. According to the node's different work modes, proposed a software design for low-power node, did the actual low power test. Through the Packet Sniffer tool for communication and information monitoring and analysis, did the network communication testThe system applied to the warehouse environment monitoring specific applications,and the system's coordinator can communicate with the monitoring center of PC through RS232 serial port. This paper designs and implements a database management system for the sensor data acquired at the service end. Warehouse environment monitoring and management software uses the VC++6.0 software platform, MSComm serial communication control for serial data transmission and reception, Access2003 database data management, realize the acquisition of the environmental parameters for real-time display, storage and monitoring network situation. Meanwhile, monitor screen inputing control instructions can control the sensor node to send and recevice datas.The experimental results show that the formation of the system with good stability is convenient. Compared with traditional data acquisition methods, the system of wirless data acquisition can not only have features intelligence, low cost, low power dissipation characteristics, at the same time for other extensions of ZigBee has reference value.