Air Flow Sensor for Detecting Plugging in Combine Discharge
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Solution Overview
Problem
Modern agricultural combines face challenges in detecting the onset of plugging in crop residue discharge systems, leading to inefficiencies and downtime, as existing sensors can only detect complete plugging and not early signs, causing crop residue to accumulate and interfere with chaff handling systems.
Innovation Solution
A system incorporating air flow sensors positioned near the crop residue discharge apparatus to monitor air flow conditions indicative of plugging, such as build-ups at the inlet opening, and output signals to operators or control systems to adjust parameters like ground speed or threshing settings to prevent further plugging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing sensors are used to detect plugging, then complete plugging can be detected, but early signs of plugging cannot be detected, leading to accumulation and interference with chaff handling systems
Solution Approach 1:
The air flow sensor detects changes in air flow conditions before complete plugging occurs, allowing early warning and preventive action to be taken. This preliminary detection enables operators to adjust settings or clear partial blockages before full plugging happens, avoiding downtime and the need for extensive plug removal operations.
Solution Approach 2:
The system continuously monitors air flow conditions through the sensor and provides feedback to the operator or control system. This feedback loop allows real-time detection of plugging tendencies and enables dynamic adjustment of operating parameters to prevent complete plugging, thereby reducing downtime and improving productivity.
2Productivity
If crop residue discharge rate is increased to maintain productivity, then harvesting efficiency improves, but plugging occurrence increases
Solution Approach 1:
By detecting air flow changes that indicate emerging plugging conditions, the system allows operators to preemptively adjust discharge rate or other parameters before plugging occurs. This enables the system to maintain high productivity settings while preventing reliability issues, as adjustments can be made in real-time rather than after failures occur.
Solution Approach 2:
The continuous monitoring and feedback mechanism provides real-time information about discharge system conditions, allowing dynamic adjustment of crop residue discharge rate. This feedback loop enables the system to optimize productivity while maintaining reliability by making real-time adjustments based on actual air flow conditions, rather than operating at fixed high rates that risk plugging.
3Measurement precision
If air flow sensors are installed to enable early detection, then plugging can be detected early, but device complexity increases
Solution Approach 1:
The air flow sensor acts as an intermediary device that indirectly detects plugging conditions by measuring changes in air flow rather than directly detecting crop residue blockages. This indirect measurement approach simplifies the sensor system compared to direct mechanical sensing, while still providing early warning capability. The sensor monitors air flow patterns that change when residue begins to accumulate, offering a simple yet effective detection method.
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
Enables early detection and prevention of plugging, reducing downtime and maintaining efficient crop residue distribution, thereby enhancing harvesting productivity and reducing operator dissatisfaction.
Implementation Method 1
an air flow sensor disposed and configured for sensing an air flow condition indicative of onset of plugging of the inlet opening
Data Source
Figure 1
Figure 2~5A
Figure 3~4
AI summary
A system for detecting a condition indicative of onset of plugging or actual plugging of discharge apparatus (68) of an agricultural combine, utilising an air flow sensor (92) disposed in relation to the discharge apparatus (68) for sensing one or more air flow characteristics or conditions indicative of at least the onset of a plugging condition.