A high-speed system for strain and temperature measurements based on fiber Bragg sensors

This work is devoted to issues related to development of measuring equipment for investigation of thermal and deformation processes with the help of sensors based on fiber Bragg gratings. A high-speed device for processing signals from Bragg sensors, developed by the Institute for Physical High Technology, Jena, with the participation of the Institute of Radio Engineering and Electronics, Russian Academy of Sciences (Ul'yanovsk Branch), is described. It can serve as a basis for development of fiber-optic measuring systems for strain and temperature monitoring. The device uses a broadband optical radiator and a miniature polychromator for a wavelength of similar to 800 nm as well as a digital signal-processing module based on an ADSP21062 processor. The measuring system allows simultaneous processing of signals from 19 fiber Bragg sensors, scanned with a period of < 1 ms.