Localized Air-Speed Control for Uniform Aerial Spray Nozzles
Solution Overview
Problem
Aerial spraying is inefficient due to wind drift, overspray, and non-uniform distribution of spray materials, exacerbated by variations in ambient conditions and air speed across aerial vehicles, which current nozzle positioning adjustments fail to address.
Innovation Solution
A fluid dispersal system with individually controlled nozzle assemblies, a controller to determine desired distribution profiles, and adjust operating parameters based on localized air speed and fluid exit velocity to maintain consistent droplet size and uniform application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high vehicle speed is used for aerial spraying, then productivity is improved, but manufacturing precision deteriorates due to wind shear and non-uniform droplet distribution
Solution Approach 1:
The system dynamically adjusts the operating parameters of each nozzle assembly in real-time based on localized air speed conditions. The controller continuously monitors air speed at each nozzle location and modulates the valve assembly parameters to compensate for variations, maintaining uniform droplet size spectra across the entire spray swath even at high vehicle speeds.
Solution Approach 2:
The system changes the operating parameters (such as valve opening duration, pressure, or flow rate) of each nozzle assembly based on the differential air speed experienced at each location. This parameter adjustment compensates for the wind shear effect, ensuring consistent droplet characteristics across the spray width while allowing high forward speed operation.
2Object-affected harmful factors
If nozzle position is altered to address non-uniform distribution, then object-affected harmful factors are reduced, but device complexity increases
Solution Approach 1:
The system replaces complex mechanical nozzle positioning mechanisms with an electronic control system that modulates the operating parameters of each nozzle assembly. Instead of physically moving nozzles to compensate for air speed variations, the system uses electronic valve control to adjust flow characteristics, reducing mechanical complexity while achieving the same corrective effect.
Solution Approach 2:
Rather than changing the physical position of nozzles, the system changes the operational parameters (flow rate, pressure, valve timing) of each nozzle assembly to compensate for non-uniform air speed distribution. This parameter-based approach achieves uniform spray distribution without requiring complex mechanical positioning systems.
3Productivity
If wide-swath spraying equipment is used, then productivity is improved, but manufacturing precision deteriorates due to increased non-uniformity across the spray width
Solution Approach 1:
The spray system is segmented into multiple independently controlled nozzle assemblies, each responding to its local air speed conditions. This segmentation allows each nozzle to be optimized for its specific position in the spray swath, maintaining uniform droplet distribution across the entire wide coverage area while preserving high productivity benefits.
Solution Approach 2:
Each nozzle assembly is given local control based on its specific position and experienced air speed conditions. The controller adjusts parameters for each nozzle individually, creating local quality adjustments that ensure uniform spray distribution across the entire wide swath, preventing the non-uniformity that typically plagues wide-coverage systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the uniformity and efficiency of aerial spraying by reducing wind drift and overspray, achieving consistent droplet size and distribution across the target area.
Implementation Method 1
controlling an operating parameter of a valve assembly of each nozzle assembly to obtain the respective target characteristic of the fluid emitted from each nozzle assembly. The operating parameter is controlled based on a difference between the determined localized air speed and a fluid exit velocity of the fluid emitted from the respective nozzle assembly
Data Source
AI summary
A method for emitting a fluid from a plurality of nozzle assemblies of a fluid dispersal system is provided. The method includes determining a desired distribution profile for the emitted fluid. The method also includes directing air into a path of the fluid emitted from the plurality of nozzle assemblies. In addition, the method includes determining a localized air speed at each nozzle assembly. Moreover, the method includes determining a target characteristic of the fluid emitted from each nozzle assembly of the plurality of nozzle assemblies. Further, the method includes controlling an operating parameter of a valve assembly of each nozzle assembly to obtain the respective target characteristic of the fluid emitted from each nozzle assembly. The operating parameter is controlled based on a difference between the determined localized air speed and a fluid exit velocity of the fluid emitted from the respective nozzle assembly.