Title:
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Linearity error in Clamp-on ultrasonic flowmeters due to the installation on pipes made of dispersive materials
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Author:
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Millán Blasco, Oliver; Salazar Soler, Jorge; Chávez Domínguez, Juan Antonio; Turó Peroy, Antonio; García Hernández, Miguel J.
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. GSS - Grup Sistemes Sensors |
Abstract:
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© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
Abstract:
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This article analyses and explains the implications that dispersive materials have over the linearity in flow measurement when a Clamp-on ultrasonic flowmeter is used.
This is of capital importance because dispersive materials are
commonly used in the manufacture of transducer wedges and
pipes.
The evaluation of this phenomenon has been tested by
experimental measurement. The used setup consisted of a water
flow calibration facility where a commercial Clamp-on ultrasonic
flowmeter was installed on it and its flow measurement was
compared with a reference flowmeter.
Two experiments have been conducted. A first experiment
was performed to evaluate only the effect produced by the fact
that the transducer wedge is made of dispersive material. For this
reason, an ultrasonic flowmeter was installed on a pipe made of
non-dispersive material, in this case, an INOX pipe. Linearity
error introduced by the wedge was below 1%. This error
complies with the accuracy specification of the ultrasonic
flowmeter given by the manufacturer (±1.5%).
Finally, a second experiment consisted of installing the
ultrasonic flowmeter on a dispersive pipe (PVC pipe) in order to
measure the worst condition (both materials, wedge and pipe,
were dispersive). Under this condition, the linearity error was
increased until it reaches a value of 6.4%. Moreover, in case of a
dispersive material pipe, the bigger the pipe thickness is, the
bigger non-linearity error is reached. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria electrònica::Instrumentació i mesura -Electrònica -- Mesuraments -Clamp-on ultrasonic flowmeters -Dispersive materials -Linearity error -Cross-correlation methods -Electronics -- Measurement |
Rights:
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Document type:
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Article - Published version Conference Object |
Published by:
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Institute of Electrical and Electronics Engineers (IEEE)
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