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:
Apr. 18, 2017
Filed:
Aug. 21, 2009
Applicants:
David John Hill, Weymouth, GB;
Magnus Mcewen-king, Farnham, GB;
Inventors:
David John Hill, Weymouth, GB;
Magnus McEwen-King, Farnham, GB;
Assignee:
Optasense Holdings Ltd., , GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 21/00 (2006.01); G01M 3/24 (2006.01); F17D 5/06 (2006.01); G01D 5/48 (2006.01); G01H 9/00 (2006.01); G01P 3/14 (2006.01); G01M 3/04 (2006.01);
U.S. Cl.
CPC ...
G01M 3/243 (2013.01); F17D 5/06 (2013.01); G01D 5/48 (2013.01); G01H 9/004 (2013.01); G01M 3/047 (2013.01); G01P 3/14 (2013.01);
Abstract
This invention relates to the fiber optic distributed acoustic sensing to detect P and S waves in a solid medium. Distributed acoustic sensing can be achieved using an unmodified fiber optic by launching optical pulses into the fiber and detecting radiation which is Rayleigh backscattered there from. By analyzing the returns in analysis bins, acoustic disturbances can be detected in a plurality of discrete longitudinal sections of the fiber. The present invention extends such fiber distributed acoustic sensing to detection of S and P waves.