Title :
Pulsed photoacoustic technique for thermal diffusivity determination
Author :
Korobov, A.I. ; Odina, N.I. ; Kokshaysky, I.N. ; Asainov, A.F.
fDate :
Oct. 31 1994-Nov. 3 1994
Abstract :
The paper describes an automated facility designed to measure thermal diffusivity of solids by analyzing amplitude spectrum of photoacoustic signal through fast Fourier transform. The facility includes a pulsed laser, a gas-filled microphone cell, digital storage oscilloscope, and a control unit linked to a computer via a parallel interface. The thermal diffusivity coefficient of duraluminium, zinc, and silicon derived from the measured characteristic frequency, which corresponds to the transition from a thermally thin to thermally thick sample coincides with literature data within the experimental error
Keywords :
automatic test equipment; fast Fourier transforms; measurement by laser beam; microcomputer applications; photoacoustic spectroscopy; thermal diffusivity; thermal variables measurement; FFT; amplitude spectrum; automated facility; computer control; control unit; digital storage oscilloscope; fast Fourier transform; gas-filled microphone cell; parallel interface; photoacoustic signal; pulsed laser; pulsed photoacoustic technique; solids; thermal diffusivity determination; Automatic testing; Discrete Fourier transforms; Laser measurement applications; Microcomputer applications; Photoacoustic spectroscopy; Thermal variables measurement;
Conference_Titel :
Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE
Conference_Location :
Cannes, France
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1994.401761
