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Napoved pridelka jabolk z metodo analize slike
Denis Stajnko, Peter Vindiš, 2011, scientific monograph

Keywords: sadjarstvo, pridelki, vizualizacija
Published: 05.06.2012; Views: 1308; Downloads: 32
URL Full text (0,00 KB)

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SISTEM ZA KONTROLIRANO NANAŠANJE FITOFARMACEVTSKIH SREDSTEV NA CILJNE POVRŠINE V PROSTORU DREVES SADOVNJAKA
Peter Berk, 2013, master's thesis

Abstract: V magistrskem delu smo razvili okolju prijazen avtomatiziran sistem, s katerim zagotavljamo kontrolirani nanos fitofarmacevtskega sredstva (FFS) na izbrane ciljne površine v prostoru habitusa dreves sadovnjaka. Realni model avtomatiziranega sistema smo realizirali s pomočjo prenosnega računalnika HP Compaq 6830s NA779ES, programskega orodja Matlab/Simulink R2011b, alternativne tehnike (mehko logično orodje FIS; Fuzzy Inference System), elektromagnetnih ventilov, krmilnega vezja elektromagnetnih ventilov, NI USB-6009 ADDA kartice, ultrazvočnih senzorjev, šob Lechler TR-80-015C in testnega poligona. Algoritem za pulzno širinsko krmiljenje elektromagnetnega ventila smo razvili s pomočjo orodja Matlab, pri čemer smo optimirali pravila in pripadnostne funkcije mehkega logičnega sistema. Rezultati so pokazali, da s pomočjo kontroliranega pulzno širinskega krmiljenja elektromagnetnih ventilov dosežemo enak učinek kot klasične metode, a ob manjši porabi FFS.
Keywords: Ključne besede: avtomatizacija, mehka logika, elektromagnetni ventil, fitofarmacevtska sredstva
Published: 19.09.2013; Views: 874; Downloads: 52
.pdf Full text (159,32 MB)

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Programmable ultrasonic sensing system for targeted spraying in orchards
Denis Stajnko, Peter Berk, Mario Lešnik, Viktor Jejčič, Miran Lakota, Andrej Štrancar, Marko Hočevar, Jurij Rakun, 2012, original scientific article

Abstract: 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.
Keywords: air-assisted sprayer, ultrasound, algorithm, programmable, microcontroller, spray distribution, orchard
Published: 22.06.2017; Views: 222; Downloads: 16
.pdf Full text (890,30 KB)

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