Field Sprayer Control Strategies for Uniform Liquid Spreading
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Solution Overview
Problem
Existing agricultural sprayers face challenges in adjusting operating parameters, such as spreading quantities, to ensure uniform distribution of spraying liquids across arable land, particularly when cornering or using application maps, leading to situations where the required parameters cannot be accurately reached due to system limitations.
Innovation Solution
Implementing a method that allows operators to select and adjust control strategies to adjust and correct operating parameters, such as spreading quantities, based on different conditions and empirical values, using an open-loop or closed-loop control system, allowing for real-time adjustments and flexibility in the spraying process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the operating parameters of spreading devices are adjusted to match varying demand along the boom, then the spreading quality improves, but the system reaches its adjustment limits and cannot achieve proper spreading in cornering or application map scenarios
Solution Approach 1:
The patent implements dynamic adjustment of operating parameters by enabling operators to select from multiple control strategies (e.g., maintaining minimum parameter, maintaining maximum parameter, or maintaining difference between parameters) during the spreading process. This allows the system to adapt to varying conditions such as cornering or application map requirements by dynamically changing which parameter remains constant while others adjust, thereby resolving the contradiction between achieving precise spreading and adapting to diverse operational scenarios
Solution Approach 2:
The patent changes the operational parameters of spreading devices by allowing adjustment of operating parameters (such as spreading quantity, pressure, or flow rate) based on selected control strategies. The system monitors parameter differences between spreading devices and adjusts them according to the chosen strategy, enabling the system to maintain acceptable parameter differences while adapting to different spreading conditions, thus resolving the limitation of fixed adjustment ranges
2Ease of operation
If multiple control strategies are provided for selecting operating parameter adjustments, then the flexibility and effectiveness of the spraying process improves, but the device complexity increases
Solution Approach 1:
The control system is designed with multi-functionality by incorporating multiple control strategies within a single unified control unit. The system can switch between different control strategies (maintaining minimum parameter, maintaining maximum parameter, maintaining parameter difference) based on operational needs, providing universal adaptability without requiring separate control systems for each strategy, thus improving ease of operation while limiting complexity growth
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring the operating parameters of spreading devices and comparing them against the selected control strategy targets. The control unit receives feedback on parameter differences and automatically adjusts parameters to maintain the desired relationship, providing operator flexibility through automated closed-loop control that manages complexity through systematic feedback processing rather than manual intervention
Data Source
AI summary
A method for spreading a spraying liquid onto arable agricultural land by way of several spreading devices associated with a field sprayer; and arranged along a spraying boom, where the spraying liquid; is applied with a needs-based spreading quantity that is associated with the respective spreading devices where at least one first operating parameter associated with at least one first spreading device; and at least one second operating parameter associated with at least one second spreading device is determined, and where a difference between the operating parameters is ascertained and/or detected, and where the first and/or second operating parameter is adjusted if the difference is outside an acceptance range, where the difference is within the acceptance range after adjustment. In order to further improve the spreading process, it is provided that at least one of several control strategies is selected, where the at least one first and/or second operating parameter is adjusted as a function of the selected control strategy.