Amplitude measurement for an ultrasonic horn

Details Amplitude measurement for an ultrasonic horn Amplitude measurement for an ultrasonic horn

G - Physics

01

H

G01H 9/00 (2006.01) B29C 65/08 (2006.01) B32B 31/24 (2000.01)

Patent

CA 2302891

A method and system for directly measuring and controlling the amplitude of an ultrasonic horn comprising an ultrasonic horn; non-contact measurement device for directly measuring an amplitude of the ultrasonic horn, and a controller for modulating the amplitude of the ultrasonic horn in communication with the non-contact measurement device. In accordance with one embodiment, the non-contact measurement device is an optical system in which a high intensity light beam is transmitted from a light source onto a surface of the ultrasonic horn, generating a plurality of reflected light beams. A portion of the plurality of reflected light beams is passed through a lens, forming a light spot which is projected onto a detector. The detector produces an output signal proportional to the strength of the light spot and the location of the light spot on the detector. Displacement of the light spot on the detector is then determined, which displacement corresponds to the amplitude of the ultrasonic horn. The output of the displacement determination is then input to a controller for controlling the amplitude of the ultrasonic horn.

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