Newcastle University Ventures Limited

Cambridge Life Sciences Plc

Calum Jack McNeil

James Stonehouse Burdess

William Henry Mullen

Dale Athey

Ronald D Armstrong

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 (&quest;f) being proportional to the change in structural properties.

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Newcastle upon Tyne, United Kingdom

Calum Jack McNeil