Disc Spreader Mass Flow Control for Slope Distribution
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Solution Overview
Problem
Disc spreaders face significant challenges in achieving even distribution of spreading materials on slopes and ground curvatures, leading to local over- or under-fertilization due to gravity shifts and changing inclinations, which existing methods fail to adequately compensate for.
Innovation Solution
A method that adjusts the target mass flow of spreading material by increasing and then reducing it when crossing concave or convex curvatures, using a control and/or regulating device to compensate for spreading errors by changing the metering element's settings before reaching the curvature apex, ensuring even distribution by modifying the mass flow qualitatively and quantitatively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the disc spreader operates on slopes and ground curvatures, then the spreading coverage is maintained, but the distribution uniformity deteriorates due to gravity shifts and changing inclinations
Solution Approach 1:
The control device adjusts the metering element settings in advance before the spreader reaches the curvature apex, proactively compensating for the gravity-induced distribution errors that will occur as the spreader traverses the concave or convex ground curvature
Solution Approach 2:
The system dynamically changes the mass flow rate parameter by adjusting the metering element opening degree based on the detected ground curvature type (concave or convex) and the spreader's position relative to the curvature apex, thereby maintaining uniform distribution despite slope variations
2Manufacturing precision
If the metering element settings are adjusted dynamically to compensate for ground curvatures, then the distribution uniformity is improved, but the device complexity increases
Solution Approach 1:
The control device receives feedback from the curvature detection system about the ground terrain characteristics and automatically adjusts the metering element settings accordingly, creating a closed-loop control system that maintains uniform distribution without manual intervention
Solution Approach 2:
The system performs self-adjustment by automatically detecting ground curvatures and modifying its own operation parameters, eliminating the need for external manual control and reducing operational complexity while maintaining precision
3Manufacturing precision
If the mass flow rate is increased before concave curvatures and reduced before convex curvatures, then the spreading errors are compensated, but the control precision requirements increase
Solution Approach 1:
The system performs curvature detection and mass flow adjustment in advance before the spreader reaches the critical curvature zones, allowing sufficient time for precise measurement and controlled parameter changes to take effect before the spreading error occurs
Solution Approach 2:
The control system dynamically adapts to varying ground curvature conditions in real-time, continuously adjusting the mass flow rate based on the detected terrain characteristics to maintain optimal distribution uniformity across different ground conditions
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 approach effectively compensates for spreading errors caused by ground curvatures, achieving more uniform distribution by adjusting the mass flow in advance, thereby minimizing areas of over- or under-fertilization, and maintaining target application rates.
Implementation Method 1
The main issue is that when a twin-disc spreader is operating on an incline, the fertilizer, due to gravity, does not hit the distribution disc at the same point as when spreading on level ground
Data Source
Figure 1A~1F
Figure 2A~2F
Figure 3~5
AI summary
A method for the uniform distribution of spreading material on surfaces with varying slopes is proposed using a disc spreader. The spreader comprises a distribution disc and a metering element associated with the distribution disc, the metering element being controllable by means of a control device. To compensate for spreading errors caused by changing slopes, such as local under- or over-fertilization, the invention provides that when traversing a concave (or convex) curvature of the soil, which has a crest line at least partially perpendicular to the direction of travel, the target mass flow rate of spreading material applied by the metering element is first increased (or decreased) and then decreased (or increased). The invention further relates to a disc spreader configured for carrying out such a method.