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    Difference equation approach to two-thermocouple sensor characterization in constant velocity flow environments

    Hung, P. C. and Irwin, G. and Kee, R. and McLoone, Sean F. (2005) Difference equation approach to two-thermocouple sensor characterization in constant velocity flow environments. Review of Scientific Instruments, 76.

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    Thermocouples are one of the most popular devices for temperature measurement due to their robustness, ease of manufacture and installation, and low cost. However, when used in certain harsh environments, for example, in combustion systems and engine exhausts, large wire diameters are required, and consequently the measurement bandwidth is reduced. This article discusses a software compensation technique to address the loss of high frequency fluctuations based on measurements from two thermocouples. In particular, a difference equation sDEd approach is proposed and compared with existing methods both in simulation and on experimental test rig data with constant flow velocity. It is found that the DE algorithm, combined with the use of generalized total least squares for parameter identification, provides better performance in terms of time constant estimation without any a priori assumption on the time constant ratios of the thermocouples.

    Item Type: Article
    Keywords: Two-Thermocouple sensor
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Item ID: 689
    Depositing User: Sean McLoone
    Date Deposited: 24 Aug 2007
    Journal or Publication Title: Review of Scientific Instruments
    Publisher: American Institute of Physics
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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