Frequency and Sensitivity Limited Fiber-Optic Transducers

Abstract

Modelling and experimental investigation of U −h characteristics of fiber-optic reflective displacement transducer, with the aim to obtain the maximal sensitivity and high speed in the displacement and vibration measurements, are presented. Excellent agreement between theory and experiment was obtained, therefore the limiting sensitivity of transducers can be predicted by modelling. Configurations of non-contact fiber optical transducers of the maximal possible sensitivity and speed were found, the metrological parameters which do not depend either on the degradation of the light source intensity or on elements used in the measurements, as well as on the value of the mirror reflection coefficient and changes due to aging. All that increases the reliability of measurement system, which is of utmost importance for process monitoring.

Modified Fiber Optic System for Monitoring the Railgun Rail Deflections

“…The work presents examination of adequacy of both models (experimental setup is as in work [8]). In order to compare adequacy of the first (1) and the second (2) model the output signals and data of experiments were normalized, i.e.…”

“…Fiber optic sensors are well suited for that. They can be installed over many meters and are able to measure distributed strain and further physical and mechanical quantities with high resolution [2]. Furthermore, optical fibers can work in strong electromagnetic fields.…”