7 April 2008 Damage detection system with sub-microsecond resolution
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Abstract
Fiber optic grating sensors have been used to measure multi-dimensional strain, pressure, temperature, corrosion and moisture. This paper presents a method of using fiber grating sensors to measure the position and velocity of a very fast event associated with a blast wave. A chirped fiber grating of 50 mm length is placed in a highly energetic material. The action of the shock wave is to destroy the fiber grating as it propagates along it. By using a spectral filter such as a chirped fiber grating in combination with high speed detectors the position and velocity of the shock wave may be determined. A layout of a system used to experimentally verify this technique is described and results presented for two different highly energetic materials.
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Eric Udd, Jerry Benterou, "Damage detection system with sub-microsecond resolution", Proc. SPIE 6933, Smart Sensor Phenomena, Technology, Networks, and Systems 2008, 69330B (7 April 2008); doi: 10.1117/12.778484; https://doi.org/10.1117/12.778484
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KEYWORDS
Fiber Bragg gratings

Sensors

Explosives

Velocity measurements

Fiber optics sensors

Signal detection

Fiber optics

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