Thin rod flexural acoustic wave sensors

Details Thin rod flexural acoustic wave sensors Thin rod flexural acoustic wave sensors

G - Physics

01

N

349/29

G01N 29/00 (2006.01) G01N 29/02 (2006.01) G01N 5/02 (2006.01)

Patent

CA 2013859

TITLE THIN ROD FLEXURAL ACOUSTIC WAVE SENSORS INVENTOR Cheng-Kuei Jen ABSTRACT OF THE DISCLOSURE A flexural acoustic wave sensing method and efficient, simple, miniature and economical ultrasonic devices using thin rods are presented. The diameter of the thin rod is less than one acoustic wavelength. The lowest order flexural acoustic wave, F11 mode, propagating along such thin rods is used. The thin rod materials can be metals, glasses, ceramics, polymers and single crystals. Any external disturbance which can alter the propagation characteristics of F11 mode may be monitored by recording such variation. Fiber acoustic interferome- ters, which are built by jointing two thin rods, can offer high sensitivity. These devices are primarily used for sensors.

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