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Optimization of flow rate measurement using piezoelectric accelerometers: Application in water industry
Affiliation:1. Department of Chemical Engineering and Materials, Rio de Janeiro Catholic University, Marquês de São Vicente Street, 225, Gávea, Rio de Janeiro, RJ, Brazil;2. Mechanical Engineering Department, Rio de Janeiro Catholic University, Marquês de São Vicente Street, 225, Gávea, Rio de Janeiro, RJ, Brazil;3. Postgraduate Metrology Programme, Rio de Janeiro Catholic University, Marquês de São Vicente Street, 225, Gávea, Rio de Janeiro, RJ, Brazil;4. Technology Management, PETROBRAS TRANSPORTE S.A., Rio de Janeiro, RJ, Brazil;1. Department of Mechanical Engineering, Polytechnique Montréal, Montréal, QC H3T 1J4, Canada;2. Department of Mechanical Engineering, École de Technologie Supérieure, Montréal, QC H3C 1K3, Canada;3. Department of Engineering Physics, Polytechnique Montréal, Montréal, QC H3T 1J4, Canada;1. Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China;2. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, PR China;1. Department of Biology, Ecology and Earth Sciences (DIBEST), University of Calabria, Via Ponte Bucci 4, Cubo 15B, I-87036 Arcavacata di Rende, CS, Italy;2. Luigi Marini, Consultant in Applied Geochemistry, Via A. Fratti 253, I-55049 Viareggio, LU, Italy
Abstract:This paper presents a method for measuring flow rates in pipelines based on the flow induced vibration principle using water as fluid, eliminating the need for interrupting the flow and opening of the pipeline for installation of traditional water flow meters. Experimental measurements are carried out in an accredited laboratory for calibration of rate flow meters and a metrological validation, followed by an uncertainty evaluation, are presented. Data analysis is accompanied by a method of optimization that minimizes adjustment errors of measurement using regression by parts and by the selection of the optimum period to estimate more accurately the flow rate. The results meet the specifications of Brazilian Metrology Institute.
Keywords:Second order calibration uncertainty  Pipe vibration  Flow induced vibration  Piezoelectric accelerometer  Water flow rate measurement
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