Bridge health monitoring system based on Brillouin distributed optical fiber sensing technology

Abstract

The invention discloses a bridge health monitoring system based on the Brillouin distributed optical fiber sensing technology. The system mainly comprises an optical fiber sensing system, a data acquisition system, a data communication and transmission system, a data analysis and processing system, and an evaluation and alarm system. The data acquisition system is used for intelligently collecting the optical signal power outputted by the optical fiber sensing system. The collected data is transmitted to the data communication and transmission system through a wireless network or special network. The data communication and transmission system remotely transmits the collected data to the data analysis and processing system. The data analysis and processing system analyzes and processes the received data, obtains monitoring information, and presents a monitoring result. The evaluation and alarm system is responsible for evaluating a monitoring result and emits alarm information timely if the result exceeds a threshold. The system can accurately measure the stress, strain, damage and other information of each point along an optical fiber, thus the obtainment cost of unit information is reduced greatly, the bridge damage and deterioration can be monitored in real time, and the alarm is emitted timely.

Description

technical field [0001] The invention belongs to the technical field of bridge monitoring methods, and in particular relates to a bridge health monitoring system using Brillouin scattering distributed optical fiber sensing technology, which can realize large-scale continuous monitoring of two-dimensional area surfaces and three-dimensional blocks on bridges An online real-time dynamic monitoring network with long distance, high spatial resolution, high precision, anti-electromagnetic interference, and no functional obstacles, and automatic diagnosis and alarm based on monitoring data. Background technique [0002] Due to the influence of various factors during the use of the bridge, various parts of the structure will be damaged and deteriorated to varying degrees. If these damages cannot be monitored and repaired in time, it will affect driving safety and shorten the life of the bridge, and cause catastrophic accidents due to sudden damage and collapse of the bridge. Requir...

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Problems solved by technology

[0005] Most of the light waves propagating in the optical fiber are forward propagating, but due to the inhomogeneous structure of the amorphous material of the optical fiber in the microscopic space, a small part will be scattered

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