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. 25, 2008
Filed:
Jun. 26, 2003
Douglas John Thomson, Winnipeg, CA;
Gregory E. Bridges, Winnipeg, CA;
Douglas John Thomson, Winnipeg, CA;
Gregory E. Bridges, Winnipeg, CA;
University of Manitoba, Winnipeg, CA;
Abstract
The system () comprises a sensor () 90×90×90×30 mm as an electromagnetic microwave cavity () with a coupler () with a wire () and an antenna (). Cavity () produces a response signal () in response to an interrogation signal () from interrogator (). Sensor () is coupled to a structure () to allow a strain to alter the resonance properties. 3.6 GHz is used with a detection of a 2.5 kHz change. If not temperature via strain is detected a mechanical amplifier is used with cavity () for temperature compensation. Continuous or intermittent narrowband signals are used as interrogation signals (). Used with bridges for structural health monitoring. Also for aircrafts, dams, buildings, vehicles.