Ultrasonic water measurement in irrigation pipelines with disturbed flow

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dc.contributorVirginia Techen
dc.contributor.authorJohnson, A. L.en
dc.contributor.authorBenham, Brian L.en
dc.contributor.authorEisenhauer, D. E.en
dc.contributor.authorHotchkiss, R. H.en
dc.contributor.departmentBiological Systems Engineeringen
dc.date.accessed2014-05-29en
dc.date.accessioned2014-05-30T13:13:50Zen
dc.date.available2014-05-30T13:13:50Zen
dc.date.issued2001en
dc.description.abstractUltrasonicflow meter accuracy was investigated over a range of flow conditions (3 pipe materials, 2 pipe sizes, 4 Reynolds numbers, 7 flow-disturbing devices) commonly found in irrigation systems. Flow rate measurements were taken at five locations downstream from a flow disturbance. The measurement accuracy was within +/-5% of actual flow at a minimum of 10 pipe diameters downstream from the flow disturbances. Errors as high as 36.5% occurred when measurements were taken close to some flow disturbances. A multiplier was developed to correct for directional bias for devices that fell into the Group I category (single elbow, two elbows, check valve, and 50% open butterfly valve with vertical and horizontal orientation). Applying the multiplier at 4.5 pipe diameters and higher resulted in accuracies within +/-4% of actual flow. The regression analysis performed on Group I devices showed that the USFM performance was not significantly different for the three pipe materials, two pipe diameters, and four flow rates.en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationJohnson, A. L.; Benham, B. L.; Eisenhauer, D. E.; Hotchkiss, R. H., " Ultrasonic water measurement in irrigation pipelines with disturbed flow," Transactions of the ASAE. Vol. 44(4): 899-910. (doi: 10.13031/2013.6254) @2001en
dc.identifier.doihttps://doi.org/10.13031/2013.6254en
dc.identifier.issn0001-2351en
dc.identifier.urihttp://hdl.handle.net/10919/48213en
dc.identifier.urlhttp://elibrary.asabe.org/abstract.asp?aid=6254&t=3&dabs=Y&redir=&redirType=en
dc.language.isoenen
dc.publisherAmerican Society of Agricultural and Biological Engineersen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectUltrasonic measurement systemen
dc.subjectWater measurementen
dc.subjectIrrigation pipelineen
dc.subjectMeteringen
dc.subjectAgricultural engineeringen
dc.titleUltrasonic water measurement in irrigation pipelines with disturbed flowen
dc.title.serialTransactions of the ASAEen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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