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Data‐acquisition system for measurement of thermal diffusivity and propagation properties of thermal waves by a non‐steady‐state method

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3 Author(s)
Santucci, A. ; Unita’ G.N.S.M., C.I.S.M. of Perugia, Perugia, Italia and Dipartimento di Fisica of Perugia, Perugia, Italia ; Verdini, L. ; Verdini, P.G.

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We describe an implementation of the experimental technique used for measuring thermal diffusivity and propagation properties of thermal waves by means of a non‐steady‐state method. The values of the phase shift and amplitude ratio of the temperature oscillation at two fixed points of the specimen are obtained directly by a data‐acquisition and processing system which uses a properly interfaced microcomputer. Moreover, in order to reduce substantially the constant temperature gradient along the specimen, the heat oscillating source was replaced by a Peltier device supplied with an alternating current.

Published in:

Review of Scientific Instruments  (Volume:57 ,  Issue: 8 )

Date of Publication:

Aug 1986

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