Application of the laser-induced photopyroelectric effect for measuring the thermal effusivity of some (semi) liquid foodstuffs

Stephane Longuemart; Alberto G. Quiroz; Dorin Dadarlat; Edson Correa da Silva; Antonio Manoel Mansanares; Abdelah H. Sahraoui; Corinne Kolinsky; Jean M. Buisine; Xenia Filip; Camelia Neamtu

doi:10.1117/12.478636

9 August 2002 Application of the laser-induced photopyroelectric effect for measuring the thermal effusivity of some (semi) liquid foodstuffs

Stephane Longuemart, Alberto G. Quiroz, Dorin Dadarlat, Edson Correa da Silva, Antonio Manoel Mansanares, Abdelah H. Sahraoui, Corinne Kolinsky, Jean M. Buisine, Xenia Filip, Camelia Neamtu

Author Affiliations +

Proceedings Volume 4762, ALT'01 International Conference on Advanced Laser Technologies; (2002) https://doi.org/10.1117/12.478636
Event: International Conference on: Advanced Laser Technologies (ALT'01), 2001, Constanta, Romania

Abstract

The photopyroelectric calorimetry, in the front (inverse) configuration, was applied in order to measure the thermal effusivity of some Brazilianfats. The front configuration with thermally thick sensor and sample, and optically opaque sensor, was used for the first time for analysing the thermal properties of fat products. The information was obtained via a frequency scan of the phase of the pyroelectric signal; the measurement needs no calibration. The main advantage of this configuration on the other two front schemes proposed before is mainly technical: one has not to use very thin foils or expensive semitransparent sensors. On the other hand, the information is contained in the phase of the signal (and not in the amplitude - as usual) which is not dependent on the power fluctuations of the radiation source.

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Stephane Longuemart, Alberto G. Quiroz, Dorin Dadarlat, Edson Correa da Silva, Antonio Manoel Mansanares, Abdelah H. Sahraoui, Corinne Kolinsky, Jean M. Buisine, Xenia Filip, and Camelia Neamtu "Application of the laser-induced photopyroelectric effect for measuring the thermal effusivity of some (semi) liquid foodstuffs", Proc. SPIE 4762, ALT'01 International Conference on Advanced Laser Technologies, (9 August 2002); https://doi.org/10.1117/12.478636

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KEYWORDS

Sensors

Personal protective equipment

Thermography

Opacity

Liquids

Calorimetry

Modulation

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