Multichannel fiber-optic interferometric sensor for measurements oftemperature and vibrations in composite materials

摘要

A multichannel fiber-optic interferometric sensor for measuringntemperature and vibrations in composite materials is presented. Thenfiber-optic sensor is designed for simultaneous monitoring of allnchannels with optical fibers embedded in the structure. The multichannelnarrangement with a common reference path and the transducer principle,nbased in optical phase measurements, provide a high sensitivity sensingnof two parameters, their spatial distributions, and the rules ofncalibration. Our results show that the temperature gradient and thenpropagation of vibrations along a carbon fiber board are obtained at thensame time using the proposed technique as well as their dynamic behavior