FIELD: thermometry.
SUBSTANCE: invention relates to thermometry and can be used to assess the reliability of the result of temperature measurement using thermoelectric converters (TEC) during operation without removing the TEC from the measurement object. A method is proposed for determining the reliability of the measurement results of a thermoelectric converter, consisting of thermoelectrodes with known thermoelectric characteristics, which are connected by a common junction, which consists in the fact that a criterion for the reliability of the measurement result of a thermoelectric converter is formed from the formed thermoelectric pairs. According to the invention, the thermoelectric converter consists of at least four dissimilar thermoelectrodes, thermoEMF is determined for each pair of dissimilar thermoelectrodes and temperature values are calculated using a microprocessor-based algorithm using theoretically obtained inverse functions, and thermoEMF mismatches are fixed for each pair of homogeneous thermoelectrodes. Then the calculated temperature values and the thermoEMF mismatch values are jointly used to determine the mismatch value as part of a diagnostic criterion based on comparing the range of calculated temperature values with a threshold value and comparing the thermoEMF mismatch with threshold values. Based on the results of the comparison, one of the statuses of the measurement result of the thermoelectric converter is formed: "confirmed", "orienting" or "unreliable".
EFFECT: proposed method makes it possible to increase the reliability of the results of temperature measurement by a thermoelectric converter.
1 cl, 4 dwg
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