Magnetostrictive substance detection system and method

Details Magnetostrictive substance detection system and method Magnetostrictive substance detection system and method

G - Physics

01

H

G01H 11/04 (2006.01)

Patent

CA 2671545

There is provided a method of detecting the presence of a substance comprising providing a cantilever (30) comprising a magnetostrictive material (34) and having an original resonant frequency. The method also comprises receiving the substance on the cantilever (30, 36) causing the resonant frequency of the cantilever (30) to change. The method also comprises applying a magnetic field to the cantilever (30) causing the resonant frequency to change to a reference resonant frequency and sensing when the resonant frequency becomes the reference resonant frequency.

La présente invention concerne un procédé servant à détecter la présence d'une substance consistant à réaliser un porte-à-faux (30) comprenant un matériau magnétostrictif (34) et présentant une fréquence de résonnance originale. Le procédé consiste aussi à recevoir la substance sur le porte-à-faux (30, 36) afin de modifier la fréquence de résonance du porte-à-faux (30). Le procédé consiste aussi à appliquer un champ magnétique au porte-à-faux (30) afin de transformer la fréquence de résonance en une fréquence de résonance de référence et à détecter lorsque la fréquence de résonance devient la fréquence de résonance de référence.

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