The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 2015
Filed:
Jan. 24, 2011
Wolfgang Schade, Goslar, DE;
Norbert Keil, Berlin, DE;
Martin Angelmahr, Hemsbach, DE;
Peter Funken, Frechen, DE;
Wolfgang Schade, Goslar, DE;
Norbert Keil, Berlin, DE;
Martin Angelmahr, Hemsbach, DE;
Peter Funken, Frechen, DE;
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Munich, DE;
Draka Cable Wuppertal GmbH, Wuppertal, DE;
Abstract
A sensor element for detecting mechanical state variables contains at least one optical waveguide having at least one fiber Bragg grating, and at least one planar optical filter element to which light exiting the optical waveguide can be fed to at least one measuring device for determining an intensity ratio of a Stokes and an anti-Stokes lines and/or a propagation time of an optical signal. A method for detecting mechanical state variables uses such a sensor element running along a measuring section, wherein light having at least one predefinable mean wavelength and a predefinable spectral width is coupled into the optical waveguide and light reflected and/or scattered in the optical waveguide is fed to at least two measuring devices, measuring the intensity of the light exiting the optical waveguide in selected spectral ranges, and measuring an intensity ratio of a Stokes and an Anti-stokes line and/or a propagation time of an optical signal.