Research on profiling tracking control optimization of orchard sprayer based on the phenotypic characteristics of tree crown

Nan, Yulong; Zhang, Huichun; Zheng, Jiaqiang; Yang, Kunqi; Yang, Wenjing; Zhang, Meng

doi:10.1016/j.compag.2021.106455

Cited by 10 publications

(2 citation statements)

References 18 publications

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“…In order to improve the complete coverage and uniform deposition of droplets in the canopy and the effective utilization of pesticides, the relevant researchers used airassisted spray [29], electrostatic spray [30], profile modeling spray [31], vertical boom spray [32], mechanical divider [33,34], circulating spray [35], target spray [36] and other technologies, thus achieving uniform deposition of droplets in the canopy. Among the above technologies, air-assisted spray technology uses forced air flow to apply an air flow load to crop branches and leaves, causing deformation to them, increasing canopy porosity, forcing droplet deposition to crop canopy, turning crop leaves at the same time, and improving droplet deposition on the back of crop leaves and in the middle and lower parts of crops [24].…”

Section: Introductionmentioning

confidence: 99%

Research Status, Methods and Prospects of Air-Assisted Spray Technology

Wei

Xue

et al. 2023

Agronomy

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Air-assisted boom sprayer is proven to be one of the best pesticide application methods to achieve uniform deposition of droplets in the canopy and improve the effective utilization of pesticides. However, the air flow velocity, air flow volume and air flow direction of the orchard sprayer should match the characteristic parameters of the target canopy, equipment spraying parameters and meteorological conditions so as to improve the spraying quality and reduce environmental pollution. This paper elaborates on the research status of air-assisted field sprayers and orchard sprayers, summarizes the research methods of air-assisted sprayers in four aspects, including experimental verification, theoretical analysis, simulation and structural optimization, and clarifies the advantages and disadvantages of these methods. It also presents two future research and development trends, including the intelligent, precise dynamic regulation of air flow velocity, air flow volume and air flow direction and the instant feedback of spraying quality, hoping to provide a reference for the research of air-assisted spray technology and equipment.

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Section: Introductionmentioning

confidence: 99%

Research Status, Methods and Prospects of Air-Assisted Spray Technology

Wei

Xue

et al. 2023

Agronomy

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“…Currently, air-assisted sprayer has become an important tool for orchard pest control ( Farooq and Salyani, 2008 ; Yang et al., 2017 ; Nan et al., 2022 ). The air-assisted spray is the process of depositing atomized droplets on the surface of leaves under high-speed airflow.…”

Section: Introductionmentioning

confidence: 99%

Measurement of morphological changes of pear leaves in airflow based on high-speed photography

Zhang

Zhou²,

Li³

et al. 2022

Front. Plant Sci.

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The morphological changes of leaves under the airflow have a significant effect on the deposition of pesticide droplets on the leaves, but the wind-induced vibration of the leaves is complicated to measure. In this study, an aerodynamic test of the pear leaf was conducted in the wind tunnel, and binocular high-speed photography was used to record the deformation and vibration of the leaves under various airflow velocities. Experiments showed that air velocity (v) had a significant effect on the morphological response of the leaf. As v increased, the leaf was in three states, including static deformation, low-frequency vibration, and reconfiguration of airfoil steady state. The mutation from one state to another occurred at the critical velocity of vcr1and vcr2. By tracking the leaf marker point, various morphological parameters were calculated, including the bending angle of the petiole, the wind deflection angle, and the twist angle of leaves under different air velocities. When vcr1 ≤v ≤vcr2, the parameters changed periodically. When v< vcr1, the petiole and the leaf bent statically, and the bending angle of the petiole and the wind deflection angle of the leaf gradually increased. When v >vcr2, the morphology of the leaf and the petiole was stable. Besides, this study tracked and measured the wind deflection area of leaf, which was consistent with the theoretical calculation results. The measurement of the leaf morphological parameters can reflect the morphological changes of leaves under airflow, thus providing a basis for the decision-making of air-assisted spray airflow.

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Street Tree Crown Detection with Mobile Laser Scanning Data Using a Grid Index and Local Features

Tong

et al. 2022

PFG

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Research on profiling tracking control optimization of orchard sprayer based on the phenotypic characteristics of tree crown

Cited by 10 publications

References 18 publications

Research Status, Methods and Prospects of Air-Assisted Spray Technology

Research Status, Methods and Prospects of Air-Assisted Spray Technology

Measurement of morphological changes of pear leaves in airflow based on high-speed photography

Street Tree Crown Detection with Mobile Laser Scanning Data Using a Grid Index and Local Features

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