한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제32권2호
  • /
  • Pages.185-190
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  • 2015
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  • 1225-9071(pISSN)
  • /
  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
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계절에 따른 실험실 환경변화를 이용한 토크측정기의 온도 및 습도 감도계수 결정

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

  • 무루게타 (한국표준과학연구원 기반표준본부 질량힘센터) ;
  • 김민석 (한국표준과학연구원 기반표준본부 질량힘센터) ;
  • 박연규 (한국표준과학연구원 기반표준본부 질량힘센터) ;
  • 이호영 (한국표준과학연구원 기반표준본부 질량힘센터)
  • 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)
  • 투고 : 2014.11.18
  • 심사 : 2014.12.18
  • 발행 : 2015.02.01
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초록

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.

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참고문헌

  1. Park, Y. K., Kim, M. S., Kim, J. H., and Kang, D. I., "Torque Standards and Evaluation," J. Korean Soc. Precis. Eng., Vol. 21, No. 9, pp. 26-31, 2004.
  2. Kim, M. S., Park, Y. K., Kim, J. H., and Kang, D. I., "2 kNm Deadweight Torque Standard Machine in KRISS," Proc. of Autumn Conference, pp. 656-659, 2004.
  3. Sanponpute, T. and Arksonnarong, N., "Temperature and Humidity Dependence on Stability of Torque Measuring Devices," Proc. of IMEKO 22nd TC3 conference, Paper No. 22, 2014.
  4. Roske, D., "Final Report on the Torque Key Comparison CCM.T-K1," Metrologia, Vol. 46, Paper No. 07002, 2009.
  5. Bruge, A., "Simplified Measurements of the Humidity Coefficient of Torque Transducers in Calibration Laboratories," Acta IMEKO, Vol. 3, No. 2, pp. 32-38, 2014.
  6. BIPM, IEC, IFCC, ILAC, ISO, IUPAC, IUPAP and OIML, "Supplement 1 to the 'Guide to the Expression of Uncertainty in Measurement'- Propagation of Distributions using a Monte Carlo Method," Joint Committee for Guides in Metrology, JCGM, Vol. 101, 2008.