The deformation monitoring of arch rib of long-span steel arch bridge is generally observed by means of total station. Based on the development of the deformation monitoring subsystem of the arch rib of Guangzhou Xinguang bridge, this paper introduces a automatic monitoring method based on the inclination sensor. By installing the inclination sensor on the arch rib of the bridge, the measured data are transmitted in wireless/wireless mode, and the monitoring system processes and analyzes the deflection deformation of the bridge. When the deflection of arch rib exceeds the alarm, the system will send the alarm information to relevant personnel in time, so as to take timely countermeasures. The monitoring system has the characteristics of high sensitivity but low cost, and can realize real-time monitoring of arch rib deflection. This system provides a new way for the design of inclination sensor monitoring system and other similar deformation monitoring and warning, and has certain engineering significance.
