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dc.contributor.authorEscolà i Agustí, Alexandre
dc.contributor.authorPlanas de Martí, Santiago
dc.contributor.authorRosell Polo, Joan Ramon
dc.contributor.authorPomar Gomà, Jesús
dc.contributor.authorCamp, Ferran
dc.contributor.authorSolanelles Batlle, Francesc
dc.contributor.authorGràcia, Felip
dc.contributor.authorLlorens Calveras, Jordi
dc.contributor.authorGil Moya, Emilio
dc.date.accessioned2011-03-23T12:20:43Z
dc.date.available2011-03-23T12:20:43Z
dc.date.issued2011
dc.identifier.issn1424-8220
dc.identifier.urihttp://hdl.handle.net/10459.1/31340
dc.description.abstractElectronic canopy characterization is an important issue in tree crop management. Ultrasonic and optical sensors are the most used for this purpose. The objective of this work was to assess the performance of an ultrasonic sensor under laboratory and field conditions in order to provide reliable estimations of distance measurements to apple tree canopies. To this purpose, a methodology has been designed to analyze sensor performance in relation to foliage ranging and to interferences with adjacent sensors when working simultaneously. Results show that the average error in distance measurement using the ultrasonic sensor in laboratory conditions is ±0.53 cm. However, the increase of variability in field conditions reduces the accuracy of this kind of sensors when estimating distances to canopies. The average error in such situations is ±5.11 cm. When analyzing interferences of adjacent sensors 30 cm apart, the average error is ±17.46 cm. When sensors are separated 60 cm, the average error is ±9.29 cm. The ultrasonic sensor tested has been proven to be suitable to estimate distances to the canopy in field conditions when sensors are 60 cm apart or more and could, therefore, be used in a system to estimate structural canopy parameters in precision horticulture.ca_ES
dc.description.sponsorshipThis work has been funded by the Spanish Ministry of Science and Innovation and by the European Union through the FEDER funds and is part of research projects Pulvexact (AGL2002-04260-C04-02), Optidosa (AGL2007-66093-C04-03) and Safespray (AGL2010-22304-C04-03).
dc.language.isoengca_ES
dc.publisherMolecular Diversity Preservation International (MDPI)ca_ES
dc.relationMICYT/PN2000-2003/AGL2002-04260-C04-02
dc.relationMIECI/PN2004-2007/AGL2007-66093-C04-03
dc.relationMICINN/PN2008-2011/AGL2010-22304-C04-03
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.3390/s110302459ca_ES
dc.relation.ispartofSensors, 2011, vol. 11, núm. 3, p. 2459-2477ca_ES
dc.rightscc-by, (c) Escolà et al., 2011ca_ES
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/deed.caca_ES
dc.subjectUltrasonic sensorca_ES
dc.subjectDistance measurementsca_ES
dc.subjectApple tree orchardca_ES
dc.subjectUltrasonic interferencesca_ES
dc.subject.otherUltrasonsca_ES
dc.subject.otherDistàncies -- Mesuramentca_ES
dc.subject.otherPomeraca_ES
dc.titlePerformance of an ultrasonic ranging sensor in apple tree canopiesca_ES
dc.typearticleca_ES
dc.identifier.idgrec016301
dc.type.versionpublishedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.doihttps://doi.org/10.3390/s110302459


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cc-by, (c) Escolà et al., 2011
Except where otherwise noted, this item's license is described as cc-by, (c) Escolà et al., 2011