UAV Spray Nozzle Rotation and Overspray Control for Structure Painting
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Solution Overview
Problem
Existing fluid spray systems, particularly those using unmanned aerial vehicles (UAVs), face challenges in efficiently and accurately applying fluids to complex or hard-to-reach surfaces, such as building exteriors and interiors, due to limitations in spray orientation, overspray mitigation, and fluid supply management.
Innovation Solution
The development of a UAV equipped with a fluid source, a nozzle system capable of rotating between vertical and horizontal orientations, and an overspray mitigation device, along with an off-board supply system that provides a continuous fluid supply, addresses the challenges of fluid application by enhancing precision, efficiency, and accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed-orientation spray nozzle is used on a UAV, then the device complexity is reduced, but the manufacturing precision and adaptability of fluid application to complex surfaces deteriorates
Solution Approach 1:
The spray nozzle is made dynamically adjustable between vertical and horizontal orientations through a rotation mechanism driven by a servo motor or similar actuator. This allows the nozzle to adapt its orientation based on the surface geometry being painted, enabling precise fluid application on complex surfaces while maintaining manageable device complexity through controlled mechanical movement rather than multiple fixed nozzle assemblies
2Device complexity
If an on-board fluid reservoir is used, then the device complexity is reduced, but the duration of action and productivity of the UAV deteriorates due to limited fluid capacity
Solution Approach 1:
The fluid supply system is segmented into two distinct components: a compact on-board reservoir mounted on the UAV for immediate fluid supply, and an off-board fluid storage system positioned on the ground or structure. The on-board reservoir maintains simple device architecture, while the off-board system extends operational duration through continuous fluid replenishment via hose or tube connections, allowing the UAV to operate for extended periods without returning to base
3Ease of operation
If a simple spray nozzle without orientation control is used, then the ease of operation is improved, but the adaptability to different surface geometries and the manufacturing precision deteriorates
Solution Approach 1:
The nozzle assembly incorporates a rotation mechanism that allows dynamic repositioning between vertical and horizontal orientations. This dynamic capability enables the operator to adapt the spray direction to match various surface geometries including vertical walls, horizontal ceilings, and angled surfaces, significantly improving versatility while maintaining straightforward operation through remote or automated control of the rotation mechanism
4Device complexity
If no overspray mitigation device is used, then the device complexity is reduced, but the loss of substance and harmful factors increase due to fluid waste and environmental contamination
Solution Approach 1:
The overspray mitigation device captures harmful overspray that would otherwise be wasted and potentially contaminate the environment. By positioning shields or barriers strategically around the spray zone, the system redirects overspray back onto the target surface or contains it within a controlled area, converting what would be harmful waste into beneficial additional coating coverage
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
This solution enables the UAV to apply fluids with high precision and efficiency, reducing overspray and ensuring consistent coverage on complex surfaces, while the off-board supply system provides a reliable and extensive fluid source, enhancing the UAV's operational capabilities.
Implementation Method 1
the nozzle configured to release the fluid as a spray on the surface
Data Source
AI summary
An unmanned aerial vehicle (UAV) includes a sprayer configured to generate a pressurized fluid flow and a nozzle configured to receive the pressurized fluid from the sprayer and to generate a spray fan to apply the fluid to a surface. The UAV includes sensors and a control unit to control both flight of the UAV and spraying by the sprayer. The fluid can be stored onboard the UAV in a reservoir or can be remotely stored and pumped to the UAV. The UAV control unit can be preloaded with a spray plan and a flight plan, or the UAV can be controlled by a user.