A new point-source/point-receiver acoustic transducer for surface wave measurement

Yung-Chun Lee, Hoa Kuo Shi Hoa Kuo

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This paper presents the development of a new acoustic transducer for measuring surface wave velocity using miniature conical PZT elements. The elements are directly fabricated out of a polarized PZT ceramic plate by excimer laser micro-machining technique. The aperture size of the machined PZT conical elements is around 200-400 μm in diameter, which allows high-frequency generation and detection of surface waves. Two of the transducers are assembled together to form a transmitter/receiver pair. Driven by a tone-burst electrical system, the transmitter acts as an acoustic point-source which launches surface acoustic waves propagating along a sample surface. The receiver then detects the surface motion. The transfer function of the transmitter/receiver system is experimentally determined. With a waveform comparison method, the surface wave velocities are obtained from the measured signal waveforms. Experimental results on several samples show that the surface wave velocity can be determined accurately. Finally, the transducer is applied on anisotropic solids. The variation of surface wave velocity as a function of propagation direction is determined.

Original languageEnglish
Pages (from-to)129-135
Number of pages7
JournalSensors and Actuators, A: Physical
Volume94
Issue number3
DOIs
Publication statusPublished - 2001 Nov 20

Fingerprint

Acoustic transducers
Surface waves
point sources
surface waves
transducers
receivers
acoustics
transmitter receivers
Transceivers
waveforms
Transducers
machining
transfer functions
excimer lasers
transmitters
Excimer lasers
bursts
apertures
Transfer functions
Transmitters

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Instrumentation

Cite this

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A new point-source/point-receiver acoustic transducer for surface wave measurement. / Lee, Yung-Chun; Shi Hoa Kuo, Hoa Kuo.

In: Sensors and Actuators, A: Physical, Vol. 94, No. 3, 20.11.2001, p. 129-135.

Research output: Contribution to journalArticle

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