Title :
Characterization of AE transducers using Davies´ bar technique
Author :
Umeda, A. ; Ueda, K.
Author_Institution :
Nat. Res. Lab. of Metrol., Minist. of Int. Trade & Ind., Ibaraki, Japan
Abstract :
A method of characterizing AE (acoustic emission) transducers using Davies´ bar technique is discussed. The method described uses a metal bar (Davies´ bar) and a projectile for the generation of input elastic waves to AE transducers. The frequency range covered by this method is up to a few hundred kHz. The characterization is done by processing the signals from strain gages glued on the side of the bar and the AE transducer using the fast Fourier transform technique. This method enables the characterization of AE transducers in the frequency range where the conventional method has not been effective.<>
Keywords :
acoustic emission; acoustic signal processing; acoustic transducers; calibration; characteristics measurement; fast Fourier transforms; strain gauges; Davies´ bar; acoustic emission transducers; dynamic characteristics; fast Fourier transform; frequency range; input elastic waves; longitudinal waves; metal bar; projectile; strain gages; Bandwidth; Calibration; Capacitive sensors; Concrete; Frequency; Glass; Projectiles; Tensile strain; Transducers; Transfer functions;
Conference_Titel :
Solid-State Sensors and Actuators, 1991. Digest of Technical Papers, TRANSDUCERS '91., 1991 International Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-87942-585-7
DOI :
10.1109/SENSOR.1991.149021
