Vibroacoustic system for vibration testing

Details Vibroacoustic system for vibration testing Vibroacoustic system for vibration testing

2011-08-02

2011-08-02

Williams, Hezron (Department: 2856)

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

C073S597000, C073S602000, C073S643000, C073S655000

Reexamination Certificate

active

07987718

ABSTRACT:
Forces are applied to a device under test and its mechanical response is measured by a laser vibrometer (50). The forces are applied without making physical contact with the device by producing an acoustical force with an ultrasonic beam (54). One embodiment employs two confocal transducers (56, 58) that produce beams that flood the device. Drive signals modulate the ultrasonic beams to produce the desired forces, and the use on a plurality of ultrasonic beams enable selective excitation of different modes of vibration of the object (7).

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International Search Report and Written Opinion corresponding to PCT/US2005/045964, under date of mailing of Jun. 21, 2006.

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