Based On Zigbee Traffic Signal Management System Research And Design

Intelligent control technique for urban roadway traffic is an important topic in control domain and traffic engineering domain. With the fast development of artificial intelligence(Al), automatic control, computer and communication techniques, many traffic flow modeling and analysis by synthesis method have been found.New theory and research achievement have been published in resent year. Their applications in engineering have been shown its tremendous powers and huge potentials.The paper puts forth effort the application of the wireless network technology on this field. Mobile and wireless technologies are undergoing major technological change. IT managers should pay close attention to the present several major wireless technologies, including Wireless LAN (WLAN), Wireless Personal Area Network (WPAN), Wireless Wide Area Network (WAN) and fixed access wireless technology. WPAN is a class of network operating in close range, usually within 10 meters. The aim of WPAN is to make mobile phones and other consumer devices connected to each other up. It is a wireless solution to replace the cables and infrared features. WPAN serves as a bridge between the consumer devices and other types of networks such as WLAN and wireless WAN. Several typical technologies, including Bluetooth, ZigBee, UWB, etc, are used for wireless personal area network.ZigBee is a new global standard for wireless communications, with the characteristics of low cost, low Power consumption and low data rate. The ZigBee Protocol based on IEEE802.15.4 standard will be embedded in thousands of sensors, which can communicate easily with power efficient.It has a good market building automation and industrial controls.ZigBee technology is based on IEEE802.15.4, particularly suited to small data throughput and network construction investment, the higher requirements of the network security, inconvenience frequent battery replacement, intelligent household, industrial, medical equipment control, agricultural automation fields of application.The paper studies on the background of ZigBee technology, the protocol architectures and the ZigBee networks. Then it completes the scheme of the wireless traffic signal control system which includes base station, router and terminal ZigBee node. It uses mesh structure to construct the network. And then, based on Jennic's JN5121 chip, the paper completes the hardware design which includes sensor module, RTC module based on I2C interface and power module etc, then completes the driver of peripheral modules.At last, it tests the performance and analyses the power of system. Characterized with flexible structure expanding and high reliability, the system contains excellent property in current use and popularization.