Abstract
The present paper deals with the problem of frequency characteristics and of the sensitivity of acoustic emission (AE) transducers. Basing on a theoretical analysis of possible calibration methods of AE transducers, the method of random noise was chosen using the spark impact as the exciting signal source. The theoretical fundaments of the spark calibration method given in the present work were verified experimentally. On these results, the experimental device was designed and built in the Institute of Physical Metallurgy, Czechoslovak Academy of Sciences in Brno. It is presented in this paper. Estimated by this device characteristics of AE transducers made by META, Prague, Czechoslovakia and by UNIPAN, Warsaw, Poland, are presented.References
[1] F. DUSEK, C. SEIDL, The calibration of AE transducers [in Czech] Proceedings of the Letni skola defektoskopie, Stary Smokovec 1987.
[2] M. HOLZMANN, Brittle fracture of low-alloyed steels [in Czech] Research Report of the Institute of Physical Metallurgy 1985.
[3] The ASTM standard E 569-76. The recommended method investigated for checking the structures by acoustic emission during the controlled stimulation.
[4] R. L. BELL, AE transducer calibration – transient pulse method. Proc. of 32 th Nat. Conf. Am. Soc. Nond. Test., Cleveland 1972.
[2] M. HOLZMANN, Brittle fracture of low-alloyed steels [in Czech] Research Report of the Institute of Physical Metallurgy 1985.
[3] The ASTM standard E 569-76. The recommended method investigated for checking the structures by acoustic emission during the controlled stimulation.
[4] R. L. BELL, AE transducer calibration – transient pulse method. Proc. of 32 th Nat. Conf. Am. Soc. Nond. Test., Cleveland 1972.
