Gauge Wheel Arm Position Sensor for Furrow Depth Sensing
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Solution Overview
Problem
Existing seeding machines face challenges in accurately determining and maintaining optimal seed depth in the furrow, as reliance on gauge wheel stops alone is insufficient, and furrow opener wear alters the actual depth over time, leading to inconsistent seed placement and reduced crop yields.
Innovation Solution
The implementation of position sensors, such as rotary potentiometers, mechanical averaging differential gearboxes, over-the-shaft sensors, sensing arrays, accelerometers, and wheel edge sensors, coupled to gauge wheel arms, which detect and average the rotational positions of gauge wheels to calculate and display the furrow depth, accounting for wear and uneven surfaces, and send signals to a controller for real-time adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gauge wheel stops are used to determine furrow depth, then the structure is simple, but measurement precision deteriorates due to furrow opener wear and uneven surfaces
Solution Approach 1:
The patent replaces the mechanical gauge wheel stop system with electronic position sensors (such as rotary potentiometers, accelerometers, or optical sensors) that directly measure the vertical position of the furrow opener. This substitution eliminates wear-related measurement errors and provides continuous, precise depth data without mechanical contact wear.
Solution Approach 2:
The patent introduces position sensors as intermediary devices between the furrow opener and the control system. These sensors act as mediators that translate physical position into electrical signals, enabling accurate depth measurement while isolating the measurement system from direct mechanical wear of the furrow opener.
2Measurement precision
If position sensors are added to gauge wheel arms, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent designs the position sensor system to serve multiple functions: measuring furrow depth, detecting gauge wheel position, and providing feedback for real-time depth adjustment. This multi-functionality justifies the added complexity by consolidating multiple measurement needs into a single integrated sensor system.
Solution Approach 2:
The patent implements a feedback control system where position sensors continuously monitor furrow depth and send signals to the controller, which automatically adjusts the furrow opener position to maintain optimal seed depth. This closed-loop feedback eliminates the need for manual adjustment and compensates for soil variations and wear in real-time.
3Productivity
If real-time depth adjustment is implemented, then productivity improves through uniform seed placement, but device complexity increases due to control system requirements
Solution Approach 1:
The patent employs a feedback control system where position sensors continuously monitor actual furrow depth and send signals to the controller. The controller processes this data and automatically adjusts the furrow opener position in real-time, ensuring uniform seed depth despite variations in soil conditions or equipment wear.
Solution Approach 2:
The system performs self-adjustment through automated control, eliminating the need for continuous manual intervention. The controller automatically compensates for depth variations by adjusting the furrow opener position based on sensor feedback, allowing the equipment to maintain optimal performance independently.
Data Source
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AI summary
A row unit (118, 18) for a seeding machine. The row unit (118, 18) includes a frame (130, 14, 30), a gauge wheel arm (166) pivotally coupled to the frame (130, 14, 30), a gauge wheel (132) coupled to the gauge wheel arm (166), a position sensor (148A, 148B, 148C, 148D, 148E, 148F, 148G, 148, 150) assembly having a position sensor (148A, 148B, 148C, 148D, 148E, 148F, 148G, 148, 150) configured to detect a rotational position of the gauge wheel arm (166), and a controller (10, 178) coupled to the position sensor (148A, 148B, 148C, 148D, 148E, 148F, 148G, 148, 150). The controller (10, 178) is configured to receive a signal from the position sensor (148A, 148B, 148C, 148D, 148E, 148F, 148G, 148, 150) and to provide an alert based on the signal.