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:
Sep. 11, 2007
Filed:
Jun. 17, 2004
David John Buttle, Wantage, GB;
William Dalzell, Winchester, GB;
Peter John Thayer, Oxford, GB;
Stephen Frank Burch, Wantage, GB;
Geoffrey Charles Eckold, Wantage, GB;
David John Buttle, Wantage, GB;
William Dalzell, Winchester, GB;
Peter John Thayer, Oxford, GB;
Stephen Frank Burch, Wantage, GB;
Geoffrey Charles Eckold, Wantage, GB;
ESR Technology Limited, Warrington, GB;
Abstract
A flexible elongate structure, such as a flexible riser (), comprising at least one layer () of steel wires near the surface which extend at least partly along the length of the structure, can be monitored by inducing a small, alternating magnetic field in the steel wires using an electromagnetic coil, and monitoring the magnetic flux density near the surface of the structure so as to asses the stress and hence detect if any wires have broken. By using an array of stress-measuring electromagnetic probes () around the structure some spatial resolution can be provided as to the location of any break in the wires.