Capacitance-Based Material Accumulation Detection for Agricultural Ground Engaging Tools
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Solution Overview
Problem
During tillage operations, material accumulation between ground engaging tools of agricultural implements can inhibit their effectiveness, making it difficult for operators to determine when accumulation occurs, leading to reduced tillage performance.
Innovation Solution
A system that includes electrically isolated ground engaging tools, a power source to apply voltage, and a capacitance sensor to measure changes in capacitance, with a controller analyzing the data to determine material accumulation and perform control actions to address it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ground engaging tools are used for tillage operations, then soil cultivation effectiveness is improved, but material accumulation between tools occurs which reduces performance
Solution Approach 1:
The capacitance monitoring system continuously measures material accumulation between ground engaging tools before it reaches critical levels that would significantly reduce tillage performance. By detecting accumulation early through capacitance changes, the system enables timely corrective actions such as adjusting tool spacing or clearing material, thereby maintaining reliable tool effectiveness throughout the operation.
Solution Approach 2:
The system implements continuous feedback by monitoring capacitance values between ground engaging tools and comparing them against threshold values. When the capacitance indicates material accumulation (dielectric properties change), the system provides feedback to operators or automatically adjusts implement operation, ensuring tillage performance is maintained despite the presence of field materials.
2Ease of operation
If operators manually monitor for material accumulation, then corrective actions can be taken, but detection difficulty reduces operational efficiency
Solution Approach 1:
The system replaces manual visual inspection and mechanical monitoring with an electrical field-based capacitance sensing system. Capacitance sensors automatically detect material accumulation between ground engaging tools by measuring changes in dielectric properties, eliminating the need for operators to manually assess accumulation conditions and significantly improving operational efficiency.
Solution Approach 2:
The monitoring system operates autonomously without requiring operator intervention for detection. The capacitance sensors continuously self-monitor the space between ground engaging tools, automatically identifying when material accumulation occurs based on predefined threshold comparisons, thereby maintaining ease of operation while boosting productivity.
3Measurement precision
If capacitance monitoring is implemented, then material accumulation detection precision is improved, but system complexity increases
Solution Approach 1:
The system achieves precise accumulation detection by monitoring changes in dielectric properties (capacitance values) between ground engaging tools. As field materials accumulate, they alter the capacitance of the electrical field between tools; by measuring these parameter changes and comparing against threshold values, the system accurately detects accumulation without requiring complex mechanical or optical sensing mechanisms.
Solution Approach 2:
The system uses the electrical field between ground engaging tools as an intermediary for detection. Rather than directly sensing physical material presence, the capacitance monitoring system measures the effect of accumulated materials on the electrical field's dielectric properties, providing accurate detection through this intermediate physical phenomenon while keeping the sensing mechanism relatively simple.
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 detects material accumulation between ground engaging tools, allowing for timely corrective actions to maintain optimal tillage performance by adjusting downforce or stopping the implement when necessary.
Implementation Method 1
a power source configured to apply a voltage across the first and second ground engaging tools
Implementation Method 2
a sensor configured to measure a capacitance across the first and second ground engaging tools
Implementation Method 3
US 2019/208698 shows a system for measuring temperature and dielectric properties of soil and other semi-solid materials
Data Source
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AI summary
A system for determining material accumulation relative to ground engaging tools of an agricultural implement may include a frame member, and first and second ground engaging tools coupled to the frame member. The first and second ground engaging tools are configured to engage soil within a field as the agricultural implement is moved across the field. The first and second ground engaging tools are electrically isolated from each other. The system may further include a power source configured to apply a voltage across the first and second ground engaging tools, a sensor configured to measure a capacitance across the first and second ground engaging tools, and a controller communicatively coupled to the sensor. The controller may be configured to determine a presence of material accumulation between the first and second ground engaging tools based at least in part on the measured capacitance.