公开(公告)号：US20170138802A1

公开(公告)日：2017-05-18

申请号：US15322369

申请日：2014-06-25

Applicant: SAAB AB

Inventor： Fredrik FISK ,  Bjorn-Erik ANDERSSON

IPC: G01K11/32 ,  G01K13/00

CPC classification number: G01K11/3206 ,  G01K13/00

Abstract: The present disclosure relates to an optical fibre sensor system (10) arranged to detect a temperature change in a zone (2, 3, 4) in an aircraft (1) having at least one zone (2, 3, 4). The optical fibre sensor system (10) comprises at least one optical fibre (11, 21, 31, 41) comprising a plurality of Fibre Bragg Gratings (20, 30, 40) for detecting a temperature change. Each of the Fibre Bragg Gratings (20, 30, 40) is reflecting radiation within a predetermined wavelength range. A radiation source unit (13) is arranged to emit radiation into the at least one optical fibre (11, 21, 31, 41). A radiation detector unit (14) is arranged to receive radiation from the at least one optical fibre (11, 21, 31, 41). A processing unit (15) is configured to identify a spectral response (22, 32, 42) of the received radiation and to determine a temperature change from the spectral response (22, 32, 42) of the received radiation in a predetermined wavelength range. Each of the at least one zone (2, 3, 4) solely has Fibre Bragg Gratings (20, 30, 40) which are reflecting radiation within the same predetermined wavelength range. The disclosure further relates to method for detecting a temperature change in a zone in an aircraft having at least one zone, by means of the optical fibre sensor system. Yet further the disclosure relates to an aircraft (1) comprising the optical fibre sensor system (10).