As Donghai Bridge is located in the open sea, it not only needs to withstand seawater corrosion, earthquake and typhoon natural disasters, but also various traffic tools to cause slow damage to the bridge structure. The bridge is monitored in real time to know the health status of the bridge in time, respond to various emergencies, and carry out necessary maintenance work to extend the service life of the bridge. The monitoring data can also be further studied and analyzed, which is of great help to the basic research of the bridge.

　　Why use clock synchronization technology? As the bridge is a special structure with a wide range of structures, monitoring points are scattered everywhere, and many monitoring items have real-time characteristics, such as earthquakes, typhoons, traffic accidents, etc. The monitoring data of various parts need very accurate time synchronization, and the general data acquisition technology cannot meet the monitoring requirements. If the clock synchronization technology is not used, It is very likely to cause a small error in the time of data collection at each monitoring point, which not only causes inaccurate monitoring results, but also seriously affects the research and analysis of bridge health. The GPS clock synchronization technology can completely avoid these problems.

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