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:
Oct. 19, 2004
Filed:
Jul. 28, 2003
James Stonehouse Burdess, Whitley Bay, GB;
Calum Jack McNeil, Newcastle Upon Tyne, GB;
Newcastle University Ventures LTD, Tyne & Wear, GB;
Abstract
A resonant sensor for determining structural property changes, in particular for detecting the presence of chemical or biological species, comprises a structure ( ) mounted to be capable of resonating and having a cyclically symmetrical configuration with two independent degenerative modes of vibration of a common natural frequency (f), and means ( ) for exciting the structure ( ) to resonate according to the two degenerative modes, regions ( ) of the structure ( ) being modified such that, on changes in the structural properties of the modified regions ( ), for example by the addition or subtraction of mass, the natural frequencies (f1, f2) of the two modes of vibration become different, the difference in frequencies (?f) being proportional to the change in structural properties.