Dynamic characterization of a transient surface temperature sensor

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This paper presents a dynamic characterization setup to calibrate transient surface temperature sensor in radiative conditions. The temperature sensor is a K type (Chromel/Alumel) wire microthermocouple which hot junction is obtained from a layer deposition by PVD process. Three different metallic layers are used (Tungsten, gold and chromium) with two thin film thicknesses (0.4 μm and 0.8 μm). The aim of this work is to develop a dynamic characterization with a radiation source from a laser focused onto the thermocouple's hot junction. The dynamic performance of the sensor is obtained by measuring its unit-impulse response function (Yag laser) and its periodic response under a chopped continuous laser beam (Argon laser). Experiments are realized at atmospheric pressure. The best results are obtained with deposited probes with gold junction of 0.4 μm thickness. The rise-time and decrease-time are equal to 10 μs and 80 μs respectively (Yag laser).




Doghmane, M. Y., Lanzetta, F., & Gavignet, E. (2015). Dynamic characterization of a transient surface temperature sensor. In Procedia Engineering (Vol. 120, pp. 1245–1248). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2015.08.840

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