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Vol. 160, Issue 12, December 2013, pp. 514-520

 

Bullet

 

Investigation of Thermocouple's Drift Speed Influence on Error of their Heterogeneity Correction
 
1 Qiang YANG, 2 Roman KOCHAN

1 Computer School, Yangtze University, Jingzhou 434023, China 2 Lviv National Polytechnic University, Bandera Str. 12, Lviv, 79013, Ukraine

1 E-mail: qiangyang@ukr.net

 

Received: 17 October 2013   /Accepted: 22 November 2013   /Published: 30 December 2013

Digital Sensors and Sensor Sysstems

 

Abstract: The method of an error correction acquired during a long term exploitation of the thermocouple electrodes heterogeneity has been studied in this paper. It is based on testing the results of different temperature fields, while thermocouple error is considered as the distribution between thermocouple's electrode zones, received using neural network learned on calibration results. These mentioned zones of thermocouple are virtual. There was a residual error in considered method that uses three-layer perceptron to evaluate error split. It is shown that the 4 times reduction of the possible number of temperature field profile (compared to the amount of thermo electrodes' virtual zones) leads to the increase of the error from 2 % to 5 %. Even such a result is acceptable. While standard deviation reaches 0.45 .

 

Keywords: Neural networks, Error of thermocouples, Inhomogeneity of thermocouples.

 

 

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