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Measuring Spray Droplet Size from Agricultural Nozzles Using Laser Diffraction
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Development and assessment of a novel single-drive variable angle spraying machine.

Naiyu Shi1,2, Zheng Chen3, He Li4

  • 1School of Mechanical Engineering, Changzhou Institute of Technology, Changzhou, 213032, China. naiyushi@163.com.

Scientific Reports
|December 29, 2024
PubMed
Summary

A new variable angle spraying machine (VASM) effectively sprays crops from top to bottom, improving pesticide application and reducing waste. This innovative sprayer enhances coverage on leaf undersides, minimizing environmental impact.

Keywords:
LinkageMultiple comparison analysisSpray coverageSpraying machineVariable angle spraying

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Area of Science:

  • Agricultural Engineering
  • Precision Agriculture
  • Crop Science

Background:

  • Traditional sprayers fail to adequately cover the undersides of crops.
  • Ineffective spray coverage leads to increased pesticide use and environmental pollution.

Purpose of the Study:

  • To design and evaluate a variable angle spraying machine (VASM) for comprehensive crop coverage.
  • To investigate the impact of VASM parameters on spray distribution and efficiency.

Main Methods:

  • Design of a VASM utilizing a linkage system for multi-directional spraying.
  • ADAMS simulation to analyze the relationship between input signals and spray angle.
  • Control variable experiments measuring nozzle sweep time, pump pressure, and distance.
  • Evaluation of spray coverage rates (top, side, bottom) under operational conditions.

Main Results:

  • The VASM achieved comprehensive crop spraying, covering both leaf surfaces and undersides.
  • Increasing distance (l) enhanced downward spray coverage (DSC) but reduced sideways spray coverage (SSC).
  • Upward spray coverage (USC) initially decreased then increased with changing parameters.
  • DSC was lower than USC and SSC due to gravity, especially in middle crop layers.

Conclusions:

  • The VASM significantly improves coverage of crop undersides and inner leaf layers.
  • This technology effectively reduces pesticide waste and environmental pollution.
  • VASM offers a viable solution for efficient and targeted crop spraying.