Ultrasonic Measurements Research: Progress in 1988

Progress is described on the design of a system for secondary calibration of acoustic emission transducers. Experimental secondary calibrations indicate that a 3.3 cm thick steel plate is not a suitable transfer block, and that the transfer block should be more like a semi-infinite medium. Simulated...

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Bibliographic Details
Main Authors: Breckenridge, F R, Proctor, T M, Hsu, N N, Fick, S E, Eitzen, D G
Format: Report
Language:English
Subjects:
ACOUSTIC EMISSIONS
Acoustics
CALIBRATION
ELECTROACOUSTIC TRANSDUCERS
EXPERIMENTAL DATA
GREENS FUNCTIONS
IMPACT TESTS
INVERSION
MEASUREMENT
PE61153N
PHYSICAL PROPERTIES
SECONDARY
SIMULATION
SOUND GENERATORS
SOURCES
TRANSDUCERS
TRANSFER
ULTRASONICS
WAVEFORMS
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Summary:Progress is described on the design of a system for secondary calibration of acoustic emission transducers. Experimental secondary calibrations indicate that a 3.3 cm thick steel plate is not a suitable transfer block, and that the transfer block should be more like a semi-infinite medium. Simulated acoustic emission sources have been studied theoretically and experimentally. Hertzian impact experiments have been carried out, and source waveforms have been reconstructed from experimental data using an inverse Green's function for the plate. Moderate agreement was obtained between Hertzian theory and the experimental results. Ultrasonics, Physical acoustics, Acoustic emission, Transducers, Calibration.