1. bookVolume 14 (2014): Issue 1 (February 2014)
Journal Details
License
Format
Journal
eISSN
1335-8871
First Published
07 Mar 2008
Publication timeframe
6 times per year
Languages
English
access type Open Access

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

Published Online: 06 Mar 2014
Volume & Issue: Volume 14 (2014) - Issue 1 (February 2014)
Page range: 29 - 34
Journal Details
License
Format
Journal
eISSN
1335-8871
First Published
07 Mar 2008
Publication timeframe
6 times per year
Languages
English
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

Keywords

[1] Park, R.M. (1993). Manual on the use of thermocouples in temperature measurement (4th ed.). Revision of ASTM special technical publication 470B.Search in Google Scholar

[2] Webster, J.G. (ed.) (1999). The Measurement, Instrumentation, and Sensors: Handbook. Springer.Search in Google Scholar

[3] State Standards of Ukraine. (1994). Thermocouples. Nominal conversional characteristics. DSTU 2837-94.Search in Google Scholar

[4] International Electrotechnical Commission. Thermocouples. Part 2: Tolerances. International standard IEC 584-2.Search in Google Scholar

[5] Sachenko, A. (1988). Accuracy increasing methods development and precision measurement system design for industry. Dissertation abstract for the Doctor of engineering degree. Leningrad: LETI.Search in Google Scholar

[6] Angkawisittpan, N., Manasri, T. (2012). Determination of sugar content in sugar solutions using interdigital capacitor sensor. Measurement Science Review, 12 (1), 8-13.10.2478/v10048-012-0002-0Search in Google Scholar

[7] Li, Z., Sun, Z. (2013). Development of the vortex mass flowmeter with wall pressure measurement. Measurement Science Review, 13 (1), 20-24.10.2478/msr-2013-0002Search in Google Scholar

[8] Sachenko, A., Tverdyj, E. (1983). Improving the Temperature Measurement Methods. Kiev: Tehnika.Search in Google Scholar

[9] Kortvelyessy, L. (1981). Thermoelement Praxis. Vulkan-Verlag.Search in Google Scholar

[10] Berezky, O. (1996). Temperature measurement systems that involve artificial intelligence. Abstract of Ph.D. dissertation, Ivan Franko National University of Lviv, Ukraine.Search in Google Scholar

[11] Turchenko, V. (2001). Neural network-based methods and means for improving the effectiveness of distributed sensor data acquisition and processing networks. Abstract of Ph.D. dissertation, Ivan Franko National University of Lviv, Ukraine.Search in Google Scholar

[12] Belousov, I. (1991). Accuracy improvement of multichannel measurement devices based on thermocouples. Ph.D Thesis, Physics and Mechanics Institute of National Academy of Science of Ukraine, Lviv.Search in Google Scholar

[13] Kyrenkov, I. (1976). Some laws of the thermoelectric heterogeneities. Research in the field of temperature measurements. Moscow: VNIIM, 11-15.Search in Google Scholar

[14] Pavlov, B. (1979). Thermoelectric inhomogeneity of thermocouples’ electrodes. Moscow: Print House of Standards.Search in Google Scholar

[15] Sloneker, K.C. (2009). Thermocouple inhomogeneity. Ceramic Industry, 159 (4), 13-18.Search in Google Scholar

[16] Vasylkiv, N., Kochan, O. (2010). Investigations of the temperature field profile change on error of inhomogeneous thermocouples. Bulletin of the Ternopil State Technical University, 2, 146-154.Search in Google Scholar

[17] Isotermal Technology Ltd. (1999). Temperature Calibration with Isotech Block Baths.Search in Google Scholar

[18] Vasylkiv, N. (2010). Increasing of the accuracy of temperature measurement using thermocouples in operating process. Abstract of Ph.D. dissertation, Ivan Franko National University of Lviv, Ukraine.Search in Google Scholar

[19] Rogelberg, N., Nuzhnov, A., Pokrovskaya, G. et al. (1969). The stability of the chromel-alumel thermocouples’ thermoelectric power at temperatures up to 1200 °C. Investigation of alloys for thermocouples. In Giprotsvetmetobrabotka. Proceedings.Search in Google Scholar

[20] Milchenko, V. (1984). Investigation of the methods and development of the devices for testing the thermocouples based on base metals. Abstract of Ph.D. dissertation, VNIIFTRI, Moscow.Search in Google Scholar

[21] Chyrka, M. (1997). Increasing of the accuracy of temperature measurement using thermocouples in irregular temperature fields. Abstract of Ph.D. dissertation, Ivan Franko National University of Lviv, Ukraine.Search in Google Scholar

[22] Chyrka, M., Vasylkiv, N., Kochan, R. (1999). Modeling of accuracy increase prediction the nonstability of thermocouples conversion characteristic. Bulletin of Ternopil Academy of National Economy, 2, 26-31.Search in Google Scholar

[23] Vasylkiv, N., Kochan, O., Kochan, V. Sachenko, A. (2009). Research of the temperature measurement error from the acquired thermoelectric heterogeneity of thermocouple electrodes. Measuring Equipment and Metrology, 70, 110-117.Search in Google Scholar

[24] Vasylkiv, N., Kochan, O., Kochan, V. (2009). The method of heterogeneity thermocouple error correction. Ukraine Patent no. 92192.Search in Google Scholar

[25] Kohan, O., Kohan, R. Thermocouple sensor. Ukraine Patent no. 97464.Search in Google Scholar

[26] Krose, B., van der Smagt, P. (1996). An Introduction to Neural Networks. University of Amsterdam.Search in Google Scholar

Recommended articles from Trend MD

Plan your remote conference with Sciendo