Agricultural Valve Control via Row Pressure and Flow Feedback
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Solution Overview
Problem
Agricultural machines face challenges in accurately controlling the application of liquid materials, such as uneven distribution and potential clogging of valves, which can lead to inefficiencies and inconsistencies in field application.
Innovation Solution
The implementation of a valve control system that uses pressure sensors and flow meters to generate control signals based on row pressure and flow rates, allowing for real-time monitoring and adjustment of valve operations to ensure precise liquid application and detect potential blockages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional valve control systems are used without pressure sensors and flow meters, then the device complexity is lower, but the manufacturing precision and reliability of liquid application deteriorate due to uneven distribution and potential clogging
Solution Approach 1:
The patent implements feedback control by using pressure sensors to monitor row pressure and flow meters to measure liquid flow rate, then using this information to adjust valve control signals in real-time. This closed-loop feedback system ensures precise liquid application by continuously comparing actual performance with desired performance and making corrective adjustments, thereby resolving the contradiction between improved precision and increased system complexity.
Solution Approach 2:
The patent replaces conventional mechanical valve control with an electronically controlled valve system that responds to sensor inputs and processor decisions. This substitution of mechanical control with electronic control and sensing enables more precise adjustment of liquid flow while providing real-time monitoring capabilities, thus improving manufacturing precision despite the added complexity of electronic components.
2Reliability
If real-time monitoring with pressure sensors and flow meters is implemented, then the reliability of liquid application is improved, but the use of energy increases due to additional sensors and control operations
Solution Approach 1:
The feedback control system improves reliability by continuously monitoring pressure and flow rate, enabling early detection of valve clogging or malfunction. The system only consumes additional energy when adjustments are needed to correct deviations from desired performance, rather than operating continuously at maximum capacity, thus balancing reliability improvement with energy consumption.
Solution Approach 2:
The control system performs self-diagnosis and self-correction by monitoring its own operation through pressure sensors and flow meters. When clogging or malfunction is detected, the system automatically adjusts valve control signals to restore proper function, reducing the need for external intervention and improving reliability without requiring continuous high energy input for manual monitoring.
3Productivity
If valve control signals are generated based on row pressure and flow rate, then the productivity of liquid application is improved through precise control, but the device complexity increases due to the need for sensors and control processing
Solution Approach 1:
The feedback control system improves productivity by optimizing liquid application in real-time based on actual pressure and flow rate measurements. By continuously adjusting valve control signals to maintain optimal performance, the system prevents waste from over-application and ensures complete coverage, thereby improving overall efficiency despite the added complexity of sensing and control electronics.
Solution Approach 2:
The control system serves multiple functions simultaneously: it monitors pressure, measures flow rate, detects valve status, adjusts valve control signals, and provides real-time feedback for optimization. This multi-functionality consolidates what could be separate systems into a unified control platform, improving productivity while limiting the increase in device complexity through functional integration.
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 more accurate and efficient liquid application by monitoring pressure and flow rates, preventing clogging and ensuring consistent distribution, thereby improving the overall performance of agricultural machines.
Implementation Method 1
Row pressure on the agricultural machine is sensed to identify when the valve is opened to apply the liquid material
Implementation Method 2
A flow meter senses a flow of liquid applied to the field
Data Source
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AI summary
An agricultural machine (100, 180) applies liquid material to a field. Valve control signals control valves (109, 204) to apply the liquid material. Row pressure on the agricultural machine is sensed (127, 210) to identify when the valve is opened to apply the liquid material. A flow meter (131, 206) senses a flow of liquid applied to the field. The valve control signals are generated, based on the row pressure, and the sensed flow.