20.500.12556/RUL-126367 Plant protection product dose rate estimation in apple orcahrds using a fuzzy logic system In the process of applying a plant protection product mixed with water (spray mixture) at the prescribed concentration with conventional sprayers for chemical protection of tree canopies in an orchard, standard models are used to express the dose rate of the plant protection product. Characteristic properties of the tree canopy in an orchard are not taken into consideration. Such models result in fixed quantities of spray mixture being sprayed through individual nozzles into a tree canopy. In this research work, an autonomous system is presented, which ensures a controlled quantity of spray mixture sprayed through the nozzles onto different tree canopy segments. The autonomous system is based on a fuzzy logic system (FLS) that includes information about the estimated leaf area to ensure more appropriate control of the spray mixture. An integral part of the FLS is a fuzzy logic controller for three electromagnetic valves operating in the pulse width mode and installed on the axial sprayer prototype. The results showed that, with the FLS, it was possible to control the quantity of spray mixture in the specific range depending on the estimated value of the leaf area, with a quantitative spray mixture average saving of 17.92%. For the phenological growth stage BBCH 91, this method represents a powerful tool for reducing the quantity of spray mixture for plant protection in the future. plant protection product spraying leaf area measurement fuzzy model tree canopy fitofarmacevtsko sredstvo škropljenje merjenje površine listov mehki model krošnja dreves true false true Angleški jezik Angleški jezik Revija 2021-04-19 13:32:52 2021-04-19 13:32:58 2022-09-05 03:54:56 0000-00-00 00:00:00 2019 0 0 Str. 1-23 no. 4, art. e0214315 Vol. 14 Apr. 2019 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 631.347.3 Y506-0087 10.1371/journal.pone.0214315 4566828 RAZ_Berk_Peter_2019.pdf RAZ_Berk_Peter_2019.pdf 1 27E9B8D987217794DAB116739C409823 91518939ca18e1a2e01b3748612ec214aeddddfac982f99ccfcd94393916b389 e52f3548-a1bb-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=142293 https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0214315 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=142292 Fakulteta za strojništvo 0 0 0