MAGNETOSTRICTIVE SUBSTANCE DETECTION SYSTEM AND METHOD

摘要

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.