Sectional Meter Calibration for Uniform Seeding
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Solution Overview
Problem
Agricultural implements often result in under-seeded areas and product overlap due to uniform control of meters, leading to wasted product and reduced yield, as they lack independent control over meter activation and deactivation based on varying distribution line lengths.
Innovation Solution
A sectional control system that calibrates the operation of meters independently using target pressures and timing to ensure uniform deposition of agricultural products across the field, utilizing a controller with sensors to determine calibration times and adjust operations based on location and conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If meters are controlled uniformly across all headers, then the control system is simple and easy to operate, but this results in under-seeded areas and product overlap due to varying distribution line lengths
Solution Approach 1:
The control system is divided into multiple independent sections, with each meter module controlled separately based on its specific distribution line characteristics. This segmentation allows each section to be optimized independently, resolving the conflict between simple uniform control and precise uniform seeding.
Solution Approach 2:
Each meter module is assigned local control parameters including target pressure, calibration time, and activation timing specific to its distribution line length and characteristics. This local quality approach ensures that each section operates optimally for its specific conditions while maintaining overall system coordination.
2Device complexity
If meters are activated simultaneously across all headers, then the control logic is simple, but this causes product overlap in some areas and under-seeding in others
Solution Approach 1:
The system performs preliminary calibration for each meter module to determine specific activation times and target pressures before operation. This preliminary action allows the control system to pre-calculate the timing needed for each section to avoid overlap and under-seeding, reducing product waste while maintaining manageable control logic.
Solution Approach 2:
Pressure sensors provide feedback to the controller, which adjusts meter activation and operation based on real-time pressure readings. This feedback mechanism ensures that each meter operates at its optimal pressure point, preventing product overlap and under-seeding while keeping control logic systematic and manageable.
3Device complexity
If distribution lines of varying lengths are supplied from a single meter, then the device structure is simple, but this results in non-uniform product delivery to different headers
Solution Approach 1:
The single meter is divided into multiple independent meter modules, each serving a specific header or group of headers. This segmentation allows each module to be calibrated and controlled independently according to its distribution line characteristics, ensuring uniform product delivery while maintaining relatively simple device structure.
Solution Approach 2:
Each meter module has adjustable parameters including rotation speed, target pressure, and activation timing that can be changed based on distribution line length and characteristics. This parameter flexibility allows the system to compensate for varying line lengths and achieve uniform product delivery without requiring complex structural modifications.
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
The system effectively reduces overlap and under-seeding by ensuring that agricultural products are deposited simultaneously across the width of the implement and at designated boundaries, enhancing yield and reducing waste.
Implementation Method 1
a pressure sensor at each header and a flow sensor in each primary line
Data Source
AI summary
In one embodiment, a method includes metering agricultural product to a first header of an agricultural implement via a first meter module of a metering subassembly, receiving, at a processor, a first signal indicative of a first amount of agricultural material at the first header, and determining, via the processor, a first time relative to activation of the first meter module when the first amount reaches a target amount of agricultural product based at least in part on the first signal.