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In situ detection of inaccurate gas flow meters using a fingerprint technique
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
Luleå tekniska universitet.
1998 (English)In: Flow Measurement and Instrumentation, ISSN 0955-5986, E-ISSN 1873-6998, Vol. 9, no 3, 143-152 p.Article in journal (Refereed) Published
Abstract [en]

This work describes an in situ method for the testing of mechanical flow meters. The method was developed on diaphragm gas meters, but can be applied to most mechanically-based flow meters. The proposed fingerprint method analyses the behaviour of the meter during a work cycle. The result from the analysis is a ''fingerprint'' of the meter, in which mechanical errors in the meter can be detected. This is explained by the mechanical connection between the sensing mechanism and the mechanical output from the meter. An error analysis of a diaphragm meter was carried out to deduce the type of errors that are likely to occur in such meters. The most severe malfunctions are leakage, internal friction and liquid in the meter. These errors can either lead to measuring errors or can cause the meter to cease functioning. The fingerprint method has been tested on meters with simulated errors and on used meters taken from the gas grid in Lund. The fingerprint method can correctly diagnose errors such as leakage, increased friction and liquid in the meter.

Place, publisher, year, edition, pages
1998. Vol. 9, no 3, 143-152 p.
Research subject
Industrial Electronics
URN: urn:nbn:se:ltu:diva-4197DOI: 10.1016/S0955-5986(98)00024-7Local ID: 21c06de0-68da-11db-8cbe-000ea68e967bOAI: diva2:977061
Godkänd; 1998; 20061029 (ysko)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved

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