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Linearity error in Clamp-on ultrasonic flowmeters due to the installation on pipes made of dispersive materials
- Source :
- I2MTC, Recercat. Dipósit de la Recerca de Catalunya, instname, UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC)
- Publication Year :
- 2017
- Publisher :
- IEEE, 2017.
-
Abstract
- © 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. 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.
- Subjects :
- Engineering
Electronics -- Measurement
business.industry
Water flow
Acoustics
020208 electrical & electronic engineering
Ultrasonic testing
Electrònica -- Mesuraments
02 engineering and technology
Flow measurement
Transducer
Dispersive materials
Ultrasonic flow meter
0202 electrical engineering, electronic engineering, information engineering
Calibration
Plastic pipework
Enginyeria electrònica::Instrumentació i mesura [Àrees temàtiques de la UPC]
Ultrasonic sensor
Clamp-on ultrasonic flowmeters
business
Linearity error
Cross-correlation methods
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 2017 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)
- Accession number :
- edsair.doi.dedup.....48773a74b170a19cfa0ffb7702b801b4