This research investigated the use of fiber optics bonded to rail for detection of rail breaks, rail bucking, and train location and speed. The findings indicate that fiber-optic sensors can detect rail break and rail buckling events, as well as the presence and speed of trains. Two types of fiber-optic sensors, point sensors and distributed sensors, and two types of detection systems, a continuous-wave system and a pulsed optical time domain reflectometry (OTDR) system, were investigated. Laboratory testing and field results indicate that the point sensor and continuous-wave system will provide the most sensitivity to train presence and speed detection. The fiber-optic point sensors that were developed have also been demonstrated in the lab for other applications such as weight-in-motion and the detection of flat spots on rail car wheels. A fiber installation cart was developed that automates the fiber placement and bonding process on the rail.


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    Titel :

    Fiber Optical Sensors for High-Speed Rail Applications


    Beteiligte:
    S. L. Chuang (Autor:in) / A. Hsu (Autor:in) / E. Young (Autor:in)

    Erscheinungsdatum :

    2003


    Format / Umfang :

    46 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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