A novel method of embedding distributed optical fiber sensor for structural health monitoring

J.H. Mao, W.L. Jin, Y. He, David J. Cleland, Y. Bai

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)


    A distributed optical fiber sensor based on Brillouin scattering (BOTDR or BOTDA) can measure and monitor strain and temperature generated along optical fiber. Because it can measure in real-time with high precision and stability, it is quite suitable for health monitoring of large-scale civil infrastructures. However, the main challenge of applying it to structural health monitoring is to ensure it is robust and can be repaired by adopting a suitable embedding method. In this paper, a novel method based on air-blowing and vacuum grouting techniques for embedding long-distance optical fiber sensors was developed. This method had no interference with normal concrete construction during its installation, and it could easily replace the long-distance embedded optical fiber sensor (LEOFS). Two stages of static loading tests were applied to investigate the performance of the LEOFS. The precision and the repeatability of the LEOFS were studied through an overloading test. The durability and the stability of the LEOFS were confirmed by a corrosion test. The strains of the LEOFS were used to evaluate the reinforcing effect of carbon fiber reinforced polymer and thereby the health state of the beams.
    Original languageEnglish
    Article number125018
    Number of pages9
    JournalSmart Materials and Structures
    Issue number12
    Early online date28 Nov 2011
    Publication statusPublished - Dec 2011

    ASJC Scopus subject areas

    • Signal Processing
    • Electrical and Electronic Engineering
    • Atomic and Molecular Physics, and Optics
    • Civil and Structural Engineering
    • Condensed Matter Physics
    • Mechanics of Materials
    • Materials Science(all)


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