Repairing method for optical fiber sensing network based on ring topology structure

Abstract

The invention discloses a repairing method for an optical fiber sensing network based on a ring topology structure. The method is based on an optical fiber sensing network comprising an fiber bragg grating interrogator and at least two ring subnets, wherein each ring subnetwork comprises a first light path switcher, a second light path switcher and M FBG (fiber bragg grating) sensors; during repairing, the position with the link fault in an optical fiber sensing network is firstly judged; then, an adjacent element linked list for representing the structure of the optical fiber sensing network after the link fault appears is established; then, according to the SPFA (shortest path faster algorithm), the demodulation path of each FBG sensor is obtained; finally, the switching path of the light switcher is calculated; according to the switching path, the corresponding light path in the optical fiber sensing network is switched. According to the repairing method for the optical fiber sensing network based on the ring topology structure, which is disclosed by the invention, an affected FBG sensor with the intact function in the optical fiber sensing network can be demodulated to the largest extent, the optical fiber sensing network can be repaired by self, and the reliability of the whole optical fiber sensing network can be improved.

Description

technical field [0001] The invention relates to the field of computer communication, in particular to a method for repairing an optical fiber sensor network based on a ring topology. Background technique [0002] In the field of modern engineering, such as aerospace vehicles, bridges and tunnels, civil engineering and other large and complex structures, the functions and use environments are becoming increasingly diverse and complex. In a complex external environment, the damage to the structure is highly concealed, the damage and failure mechanisms are complex, and the type and degree of damage are difficult to judge. As a result, the health monitoring of the structure becomes particularly complicated, and the number of sensors required is also greatly increased. . FBG sensors have the advantages of light weight, thin diameter, corrosion resistance, integration of signal transmission and sensing, easy construction of distributed sensor networks, and strong anti-electromagn...

AI Technical Summary

Problems solved by technology

When there is a link failure in the optical fiber sensor network, the system will not be able to accurately collect monitoring data. If the link failure is not repaired, it will have a certain impact on the evaluation results of structural health monitoring, and even make the monitoring system unsure about the health of the structure. Generate false positives and false negatives

[0004] Due to the increase in the number of FBG sensors in the optical fiber sensing network on large and complex structures, and the fact that FBG sensors are mostly pasted on the surface of the structure or embedded in the structure, if the network is to be repaired or replaced, it will have a great impact on the structure

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