Investigations of Thermocouple Drift Irregularity Impact on Error of their Inhomogeneity Correction

Su Jun 1  and Orest Kochan 2
  • 1 School of Computer Science, Hubei University of Technology, Hubei, China
  • 2 Department of Metal Physics, Ivan Franko National University of L'viv, 1, Universytetska str., 79000, Lviv, Ukraine

Abstract

The article examines: (i) the reasons of error due to thermoelectric inhomogeneity of electrodes of thermocouples acquired during prolonged use; (ii) the neural network method of error correction based on a generalization of verification results in several temperature fields; (iii) the method of investigating the impact of changing the speed of the conversion characteristic drift of thermocouple on error correction; (iv) results of this investigation. It is shown that residual error for type K thermocouples at the 5 % level of significance does not exceed μ±0.46 oС and one at the 10 % level of significance does not exceed ±0.25 °С

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