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Transactions of the Institute of Measurement and Control
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Sliding window two-thermocouple sensor characterization for variable flow environments

Peter C. Hung

Department of Electronic Engineering, National University of Ireland Maynooth (NUIM), Maynooth, Co. Kildare, Ireland

Seán F. McLoone

Department of Electronic Engineering, National University of Ireland Maynooth (NUIM), Maynooth, Co. Kildare, Ireland, sean.mcloone{at}eeng.nuim.ie or s.mcloone{at}ieee.org

George W. Irwin

Virtual Engineering Centre, Queen's University Belfast, Belfast, BT9 5HN, Northern Ireland

Robert J. Kee

Virtual Engineering Centre, Queen's University Belfast, Belfast, BT9 5HN, Northern Ireland

A two-thermocouple sensor characterization method for use in variable flow applications is proposed. Previous offline methods for constant velocity flow are extended using sliding data windows and polynomials to accommodate variable velocity. Analysis of Monte-Carlo simulation studies confirms that the unbiased and consistent parameter estimator outperforms alternatives in the literature and has the added advantage of not requiring a priori knowledge of the time constant ratio of thermocouples. Experimental results from a test rig are also presented.

Key Words: sensor fusion • temperature measurement • thermocouple • total least-squares.

Transactions of the Institute of Measurement and Control, Vol. 30, No. 5, 349-370 (2008)
DOI: 10.1177/0142331208095379
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