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http://dx.doi.org/10.7736/KSPE.2015.32.2.185

The Determination of Temperature and Humidity Sensitivity Coefficients of Torque Transducers using Seasonal Climatic Changes of Ambient Conditions in the Laboratory  

Derebew, Mulugeta (Division of Physical Metrology, Korea Research Institute of Standards and Science)
Kim, Min Seok (Division of Physical Metrology, Korea Research Institute of Standards and Science)
Park, Yon Kyu (Division of Physical Metrology, Korea Research Institute of Standards and Science)
Lee, Ho Young (Division of Physical Metrology, Korea Research Institute of Standards and Science)
Publication Information
Journal of the Korean Society for Precision Engineering / v.32, no.2, 2015 , pp. 185-190 More about this Journal
Abstract
This paper presents a new method to determine sensitivity coefficients of temperature and humidity of torque transducers by using a natural and seasonal variation of ambient conditions at the laboratory. We had measured the sensitivities of the torque transducers over almost one year using the KRISS 2 kN m torque standard machine. The sensitivity data acquired at various ambient conditions were processed using our measurement model to extract the sensitivity coefficients of temperature and humidity simultaneously with high precision. A comparison with a previous method using an environmental control chamber was carried out to test the feasibility of using our new method. Two results agreed within the uncertainty. We revealed that the torque measuring errors could be 8 times higher than the measurement and calibration capability of KRISS torque standard machine if the sensitivity changes due to the temperature and humidity are not properly corrected during a calibration.
Keywords
Torque transducer; Torque measuring device; Sensitivity coefficients of the humidity;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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