• 한국유체기계학회 논문집
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• 제6권2호
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• pp.47-53
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• 2003

The piston prover was developed and the flow measurement uncertainty of this piston prover was evaluated according to ISO/IEC 17025. The laser interferometer, instead of the optical sensors used in the typical provers, was employed in this prover to measure accurately the testing time and the moved distance of the piston. Uncertainty was calculated with evaluation of various uncertainty factors affecting flow measurement. The expanded uncertainty (U) of the piston prover was $1.3{\times}10^{-3}$ (at the confidence level of $95\%$). This evaluation example will be useful in the flow measurement uncertainty determination of other gas flow measurement system.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2002년도 유체기계 연구개발 발표회 논문집
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• pp.354-359
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• 2002

The new piston prover was developed and the flow measurement uncertainty of this piston prover was evaluated according to ISO/IEC 17025. The laser interferometer was employed to measure accurately the testing time. Uncertainty was calculated with evaluation of various uncertainty factors affected in flow measurement. The expanded uncertainty(U) of the piston Over was $1.3{\times}10^{-3}$ (at the confidence level of $95\%$). This evaluation example will be useful in flow measurement uncertainty determination of other gas flow measurement system.

• 대한기계학회논문집
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• 제14권1호
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• pp.259-266
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• 1990

본 연구에서는 지금까지 개발된 각종 소형 푸루버의 작동원리 및 장단점을 분 석 비교한 결과에 따라 이중 실린더형의 소형 푸루버를 직접 설계 제작하고, 개발된 소형 푸루버를 사용하여 펄스 주기 변동특성이 각각 다른 유량계를 대상으로 펄스보간 오차 시험을 실시하였다. 실험결과는 통계적 방법을 도입하여 분석함으로써 유량계 각각에 대하여 기대 검증 정확도 수준을 선정하였다. 또 기대검증 정확도가 좋지 않 게 예상되는 유량계에 대해서는 검증 정확도 향상 방안을 제시하였다.