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Fundamental uncertainty analysis of flowrate measurement using the ultrasonic Doppler velocity profile method |
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| Affiliation: | 1. School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;2. Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;3. Shanghai Key Laboratory for Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China;4. Department of Science and Liberal Art, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China;1. National Institute of Advanced Industrial Science and Technology, Tsukuba Central 3, 1-1-1, Umezono, 305-8563 Tsukuba, Japan;2. Laboratory for Flow Control, Faculty of Engineering, Hokkaido University, N13W8, 060-8628 Sapporo, Japan;3. Laboratory of Food Process Engineering, Institute of Food Science and Nutrition, ETH Zürich, Schmelzbergstrasse 7, 8092 Zürich, Switzerland |
| Abstract: | The present paper describes a fundamental uncertainty analysis for a flowrate measurement in a pipe using an ultrasonic Doppler velocity profile method and an evaluation of the estimated uncertainty by an actual flow calibration. The uncertainties are estimated for internal factors originating from the measurement equipment; UVP provided by Met-Flow sa. and external factors depending on on-site measurements, such as the inclination angle of the ultrasonic transducer. The relative expanded uncertainty due to internal factors is estimated to be 0.34% with a coverage factor of 2. The relative external uncertainty including external factors is estimated to be from 0.42% to 2.13% depends on the inclination angle of the transducer. The results of the actual flow calibration under the same condition as the uncertainty analysis are within the range of uncertainty considering the internal factors. |
| Keywords: | Flowrate Velocity profile Calibration Uncertainty Doppler Ultrasonic |
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