Heterogeneous sensor network and method for bridge and major infrastructure structure safety monitoring and early warning

Abstract

Provided is a heterogeneous sensor network and method for bridge and major infrastructure structure safety monitoring and early warning. A sensor module is adopted to be installed on key structure points of major infrastructures such as bridges and is used for monitoring vibration, strain and environment humiture and illumination information of the key structure points. A wired sensor node is installed on key structure points of main towers of the bridges and on the inside portions of steel box girders and used for collecting vibration, strain gage information and environment information such as temperature and humidity of the main towers and the steel box girders, and a wire transmission mode is adopted. A wireless sensor node is installed on key structure points of main cables and suspension cables of the bridges and used for collecting vibration, information of strain and the like, and environment information such as temperature and humidity of the main cables and the suspension cables. The heterogeneous sensor network and method for the bridge and major infrastructure structure safety monitoring and early warning can be used for evaluating and early warning for monitored major infrastructure structure safety states.

Description

technical field [0001] The invention relates to monitoring and emergency early warning control technology of major infrastructure structure safety status, in particular to a heterogeneous sensor network system used for major infrastructure structure safety monitoring and early warning. Background technique [0002] Bridges and other major infrastructure such as tunnels, dams, high-speed railways, etc., will affect their own structural safety due to factors such as weather, vibration, impact, and self-aging under long-term operation, thereby causing public safety hazards. Once an accident occurs Occurrence will not only cause heavy property damage, but also seriously endanger life. Therefore, it is very important to monitor the structural safety of major infrastructure and provide effective early warning information in a critical state. [0003] For the traditional manual detection method of major infrastructure structure safety, not only the cycle is long and the efficiency...

AI Technical Summary

Problems solved by technology

However, the use of wireless systems is also limited by the environment

The wireless transmission technology used by wireless sensors is a line-of-sight transmission technology, which is easily blocked by obstacles and difficult to deploy in complex on-site environments; the transmission distance of wireless sensor systems is usually short, which is not suitable for large-span infrastructure. monitor

These two limitations can be solved by adding relay nodes, but it increases the system cost

In addition, in closed spaces and steel structures, such as steel box girders of large bridges, multipath interference will cause a decrease in wireless transmission quality and an increase in error rates

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