Abstract
Description of design, principles and functioning of distributed optical fiber piezoelectroluminescent (PEL) sensors embedded in polymer composite structures for refined monitoring of inhomogeneous “gradient” strains fields inside structures is given. The informative light signal occurs due to the mechanical-luminescent effect caused by the interaction of the piezoelectric and electroluminescent elements (sectors of layers) of the sensor. Monitoring are found as a result of digital processing of the information spectrum of the intensities of the integral light signal at the output from the optical fiber taking into account the known dependences of the light output intensity of the each j-th electroluminophore on electrical voltage applied thereto. Mathematical models have been developed, settings and problem solving scheme on finding numerical values of transfer information and control coefficients of PEL sensors are given, and results of numerical calculation of transfer coefficients of sensor for case of small values of gradients of diagnosing strains field are presented.
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