Pulsed photoacoustic technique for thermal diffusivity determination

Author

Korobov, A.I. ; Odina, N.I. ; Kokshaysky, I.N. ; Asainov, A.F.

Volume

2

fYear

1994

fDate

Oct. 31 1994-Nov. 3 1994

Firstpage

785

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE

Conference_Location

Cannes, France

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1994.401761

Filename

401761