FACILITY FOR MEASURING DEFORMATIONS ON BASE OF QUASI-DISTRIBUTED FIBRE-OPTICAL SENCORS ON BRAGG GRIDS Russian patent published in 2009 - IPC G01B11/16 

FIELD: measuring technology.

SUBSTANCE: facility consists of wide-band super-luminescent diode (SLD), radiation of which comes to the first pole of four-pole splitter via convertible spectral filter and via its fourth pole to the fist pole of three-band splitter, the second pole of which is connected with a calibrating cuvette, while the third pole is connected with the third photo-receiving device (PRGD). Output of the calibrating cuvette containing acetylene, is connected with an input of the second PRGD. Radiation from the third pole of the four-pole splitter comes to Bragg sensors, while radiation reflected from them comes to the input of the first PRD (photo-receiving device) via the third and the second poles. Outputs of PRD are connected with a computer via and analogue-digital converter; the computer determines spectre of acetylene attenuation by signals from the second and the third PRGD; and by the most contrast spikes it calibrates modulation of SLD spectre by means of which it calibrates signals from Bragg sensors picking-up the first PRD.

EFFECT: increased sampling frequency of Bragg sensors, also facilitation of increased number of sensors in facility.

7 cl, 10 dwg