Practical design of a high frequency phased-array acoustic microscope probe -a preliminary study

Jeong Nyeon Kim, Richard L. Tutwiler, Judith Todd Copley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Scanning acoustic microscopy (SAM) has been a wellrecognized tool for both visualization and quantitative evaluation of materials at the microscale since its invention in 1974. While there have been multiple advances in SAM over the past four decades, some issues still remain to be addressed. First, the measurement speed is limited by the mechanical movement of the acoustic lens. Second, a single element transducer acoustic lens only delivers a predetermined beam pattern for a fixed focal length and incident angle, thereby limiting control of the inspection beam. Here, we propose to develop a phased-array probe as an alternative to overcome these issues. Preliminary studies to design a practical high frequency phased-array acoustic microscope probe were explored. A linear phased-array, comprising 32 elements and operating at 5 MHz, was modeled using PZFlex, a finite-element method software. This phasedarray system was characterized in terms of electrical input impedance response, pulse-echo and impulse response, surface displacement profiles, mode shapes, and beam profiles. The results are presented in this paper.

Original languageEnglish (US)
Title of host publicationHigh-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); SPC Track for Senate
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791857984
DOIs
StatePublished - Jan 1 2017
EventASME 2017 Pressure Vessels and Piping Conference, PVP 2017 - Waikoloa, United States
Duration: Jul 16 2017Jul 20 2017

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume5
ISSN (Print)0277-027X

Other

OtherASME 2017 Pressure Vessels and Piping Conference, PVP 2017
CountryUnited States
CityWaikoloa
Period7/16/177/20/17

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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