Corrosion Detecting and Monitoring Method and Apparatus
PATENT, FILED 14 JUL 95, PATENTED 8 JUL 97
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
A nondestructive method and apparatus for optical detection and monitoring corrosion in structures normally inaccessible to light and observation. An optical fiber coated with a corrosion sensitive compound is embedded in the structure. Tapped Bragg gratings of different Bragg periods are spaced along the fiber and refract a narrow bandwidth component of a broad beam light pulse transmitted through the fiber. Due to corrosion, the refracted components are reflected by the compound and their amplitudes are detected and displayed for each narrow bandwidth.
- Properties of Metals and Alloys
- Fiber Optics and Integrated Optics