Piezoelectrically tunable resonance frequency beam utilizing a stress-sensitive film

Patent · Mon Dec 31 23:00:00 EST 2001

OSTI ID:874196

Thundat, Thomas G ^[1]; Wachter, Eric A ^[2]

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1. Knoxville, TN
2. Oak Ridge, TN

Methods and apparatus for detecting particular frequencies of acoustic vibration utilize a piezoelectrically-tunable beam element having a piezoelectric layer and a stress sensitive layer and means for providing an electrical potential across the piezoelectric layer to controllably change the beam's stiffness and thereby change its resonance frequency. It is then determined from the response of the piezoelectrically-tunable beam element to the acoustical vibration to which the beam element is exposed whether or not a particular frequency or frequencies of acoustic vibration are detected.

• Research Organization: LOCKHEED MARTIN ENERGY RES COR
• DOE Contract Number: AC05-96OR22464
• Assignee: UT-Battelle, LLC (Oak Ridge, TN)
• Patent Number(s): US 6336366
• OSTI ID: 874196
• Country of Publication: United States
• Language: English

Related Subjects

/73/310/
acoustic
acoustic vibration
acoustical
apparatus
beam
beams
change
controllably
detected
detecting
determined
electrical
element
exposed
film
frequencies
frequency
layer
means
methods
piezoelectric
piezoelectrically
piezoelectrically-tunable
potential
providing
resonance
resonance frequency
response
sensitive
sensitive film
stiffness
stress
stress-sensitive
tunable
utilize
utilizing
vibration