Quantitative modal analysis of ultrasonic transducers by stroboscopic holographic interferometry

Characterization of ultrasonic transducers by means of double-exposure holographic interferometry

The Journal of the Acoustical Society of America ◽

10.1121/1.418008 ◽

1997 ◽

Vol 101 (1) ◽

pp. 281-288

Author(s):

Lucio N. Tello ◽

Truman D. Black ◽

Don P. Cudmore ◽

Robert Magnusson

Keyword(s):

Holographic Interferometry ◽

Ultrasonic Transducers ◽

Double Exposure ◽

Double Exposure Holographic Interferometry

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Laser Scanning Vibrometry and Holographic Interferometry Applied to Vibration Study

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.801.303 ◽

2015 ◽

Vol 801 ◽

pp. 303-311

Author(s):

Florin Breaban ◽

Roger Debuchy ◽

Didier Defer

Keyword(s):

Nondestructive Testing ◽

Modal Analysis ◽

Holographic Interferometry ◽

Peak Power ◽

High Performance ◽

Laser Scanning ◽

Laser System ◽

Industrial Control ◽

Automotive Technology ◽

Micro Deformation

The applications of high performance materials in the aerospace and in the automotive technology in the next years need to develop new vibration study, nondestructive testing, predictive maintenance and industrial control methods.The Laser Scanning Vibrometry and Holographic Interferometry methods of vibration study and nondestructive testing by modal analysis are described. The Laser Scanning Vibrometer PSV 400 is made by Polytec GmbH and the PSV software reconstructs the 3D model of the measured micro-deformation of the object. The holographic laser system HLS-3 from Lumonics Inc. has 100 MW ruby laser peak power and 30 ns pulse width.Using mechanical excitation to induce a measurable vibration, the Laser Scanning Vibrometry and Holographic Interferometry modal analysis measurements show up the vibrational signatures and the damaged areas of the objects made by high performance materials - polymers, composites.

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Modeling and Modal Analysis on Capacitive Micromachined Ultrasound Transducers

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.620.300 ◽

2014 ◽

Vol 620 ◽

pp. 300-303

Author(s):

Yan Li ◽

Pei Yu Zhang

Keyword(s):

Modal Analysis ◽

Thin Plate ◽

Fem Simulation ◽

Ultrasonic Transducers ◽

Side Length ◽

Ultrasound Transducers ◽

Resonant Frequencies ◽

Capacitive Micromachined Ultrasonic Transducers ◽

Length Width ◽

Vibration Modal

The capacitive micromachined ultrasonic transducers with square and rectangular membranes were modeled for FEM simulation. The membrane is modeled as a thin plate clamped on all sides. Resonant frequencies and vibration modal analysis were carried out. The modes of CMUT with square and rectangular membranes are different. It can be basis for building CMUTs’ structure. Moreover, the resonant frequencies will vary with different side length and ratio of length/width of membrane.

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