20.500.12556/DKUM-66375 Programmable ultrasonic sensing system for targeted spraying in orchards This research demonstrates the basic elements of a prototype automated orchard sprayer which delivers pesticide spray selectively with respect to the characteristics of the targets. The density of an apple tree canopy was detected by PROWAVE 400EP250 ultrasound sensors controlled by a Cypress PSOC CY8C29466 microcontroller. The ultrasound signal was processed with an embedded computer built around a LPC1343 microcontroller and fed in real time to electro-magnetic valves which open/close spraying nozzles in relation to the canopy structure. The analysis focuses on the detection of appropriate thresholds on 15 cm ultrasound bands, which correspond to maximal response to tree density, and this was selected for accurate spraying guidance. Evaluationof the system was performed in an apple orchard by detecting deposits of tartrazine dye (TD) on apple leaves. The employment of programmable microcontrollers and electro-magnetic valves decreased the amountof spray delivered by up to 48.15%. In contrast, the reduction of TD wasonly up to 37.7% at some positions within the tree crown and 65.1% in the gaps between trees. For all these reasons, this concept of precise orchard spraying can contribute to a reduction of costs and environmental pollution, while obtaining similar or even better leaf deposits. air-assisted sprayer ultrasound algorithm programmable microcontroller spray distribution orchard pršilnik z zračnim tokom ultrazvok algoritem mikrokrmilnik distribucija pršila sadovnjak true false true Angleški jezik Slovenski jezik Znanstveno delo 2017-06-22 12:31:57 2017-06-22 12:32:59 2022-07-11 03:06:35 2019-07-11 15:45:26 2012 0 0 str. 15500-15519 št. 11 Letn. 12 2012 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1424-8220 636.348:004.9:634.1 10176278 3424812 10.3390/s121115500 1424-8220 URN:SI:UM:DK:D4XXEPGM Sensors_2012_Stajnko_et_al._Programmable_Ultrasonic_Sensing_System_for_Targeted_Spraying_in_Orchards.pdf Sensors_2012_Stajnko_et_al._Programmable_Ultrasonic_Sensing_System_for_Targeted_Spraying_in_Orchards.pdf 1 EEC504B6DBBCA8D4A9090E0F34E8AFE5 2797d3e9e0b83e10b1678f96c0d06fd339615811605d3f5abe860b2883400b71 48b340a9-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=112955 http://www.mdpi.com/1424-8220/12/11/15500/ 1 https://dk.um.si/Dokument.php?lang=slv&id=112954 Fakulteta za kmetijstvo in biosistemske vede 0 0 0