Bridge Condition Monitoring System Using Wireless Network (CDMA and ZigBee)

Advancements in sensor technology have brought the automated real-time bridge health monitoring system. Many long span bridges in Korea and in Japan have adopted this real-time health monitoring system. However, current systemuses complicated and high costwired networkamongst sensors in the bridge and high cost opticalcable between the bridge and the management center, which increases the overall cost of installation and maintenance cost of health monitoring system. The complicated wiring alsomakes the installation and repair/replacement process difficult and expensive. In this paper, a new idea of bridge healthmonitoring systemis suggested.For short distance (among sensors in the bridge) ZigBee wireless network is tested, and CDMA for long distance (between the bridge and the management center) data communication is tested.