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Study of TFTC Dynamic Character Calibration Technique

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Abstract

A TFTC (thin film thermocouple) is an advanced thermal sensor that is used for measuring transient temperatures. Because of the TFTC’s high-speed response, the usual calibration instrument and method cannot meet the calibration needs. This article introduces a pulse laser heating method. Dynamic character measurements and system identification are combined. The material of the TFTC is NiCr–NiSi, and the film thickness is 2 μm with a ceramic substrate. The transfer function is derived by means of a least-squares solution. In this method under the assumption of an ideal temperature step, there is no strict requirement on a first-order system and the limit of a pulse laser bandwidth. The calibration method introduced in this article resolves the TFTC dynamic character calibration problem.

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Authors and Affiliations

  1. Beihang University, Beijing, China

    Yong-jun Yang

  2. Beijing Changcheng Institute of Metrology and Measurement, Beijing, China

    Yong-jun Yang, Jing Cai, Xue-cong Zhang & Jian Zhao

Authors
  1. Yong-jun Yang
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  2. Jing Cai
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  3. Xue-cong Zhang
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  4. Jian Zhao
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Correspondence to Yong-jun Yang.

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Yang, Yj., Cai, J., Zhang, Xc. et al. Study of TFTC Dynamic Character Calibration Technique. Int J Thermophys 32, 1479–1484 (2011). https://doi.org/10.1007/s10765-011-1053-4

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  • DOI: https://doi.org/10.1007/s10765-011-1053-4

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