Piezoelectric sensing systems

Details Piezoelectric sensing systems Piezoelectric sensing systems

G - Physics

01

F

G01F 23/296 (2006.01) G01N 29/02 (2006.01) G01N 29/036 (2006.01)

Patent

CA 2188547

A piezoelectric sensing system is disclosed wherein a vibrating piezoelectric sensing element (50) is driven by a periodic drive signal at or close to the resonant frequency of the sensing element, and wherein a return signal from the sensing element is monitored to detect a shift in the resonant frequency.

Systèmes de détection piézo-électrique dans lequel un élément (50) de détection piézo-électrique vibrant est excité par un signal d'excitation périodique à la fréquence de résonance de l'élément de détection ou à proximité de cette dernière; et un signal de retour provenant de l'élément de détection est surveillé pour détecter un glissement dans la fréquence de résonance.

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