研究目的
Investigating the use of infrared thermometry to detect breakage points of optical fibers embedded in structures for structural health monitoring.
研究成果
The IRT-based method effectively detects breakage points of optical fibers embedded in structures, offering real-time operation, cost efficiency, and visual display. Future studies should address its limitations in deep structures.
研究不足
The method's effectiveness decreases when optical fibers are embedded deep in structures. The time constant and dependence coefficient vary with materials and conditions of the structure.
1：Experimental Design and Method Selection:
The study utilized infrared thermometry to detect the thermal energy conversion at the breakage points of optical fibers embedded in structures.
2：Sample Selection and Data Sources:
A CFRP-strengthened steel plate with embedded silica single-mode fibers was used as the specimen.
3：List of Experimental Equipment and Materials:
Equipment included a semiconductor laser, an erbium-doped fiber amplifier (EDFA), and an infrared thermometer (FLIRi7, FLIR). Materials included silica single-mode fibers and CFRP strips.
4：Experimental Procedures and Operational Workflow:
The fibers were broken by applying compressive strain, and light was injected into one of the SMFs. The surface temperature was measured with an IRT.
5：Data Analysis Methods:
Temporal dependencies of temperature change were measured and analyzed.
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