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. 26, 2013
Filed:
Apr. 22, 2010
Bernd Günther, Karlsruhe, DE;
Hagen Ruppin, Nauheim, DE;
Karl-heinz Haase, Pfungstadt, DE;
Tobias Kipp, Rödermark, DE;
Manfred Kreuzer, Weiterstadt, DE;
Jochen Maul, Mainz, DE;
Rudolf Schulz, Weiterstadt, DE;
Bernd Günther, Karlsruhe, DE;
Hagen Ruppin, Nauheim, DE;
Karl-Heinz Haase, Pfungstadt, DE;
Tobias Kipp, Rödermark, DE;
Manfred Kreuzer, Weiterstadt, DE;
Jochen Maul, Mainz, DE;
Rudolf Schulz, Weiterstadt, DE;
Hottinger Baldwin Messtechnik GmbH, Darmstadt, DE;
Abstract
The invention relates to an optical strain gauge using a glass fiber () comprising a Bragg grating (). The glass fiber is coated with a sheath () of polyether ether ketone with an admixture of at least 10 weight percent and a maximum of 40 weight percent of an inorganic filler, with a particle size of between 0.08 μm and 12 μm. The outer diameter of the sheath () is between 0.2 mm and 1.2 mm. The ratio D/d between the outer diameter D of the sheath () and the diameter d of the glass fiber () is between 2 and 6. A pressure of the sheath () on the glass fiber () is such that essentially no relative movement can occur between the glass fiber () and the sheath ().