Stalk-Diameter Sensing System With Deflectable Feeler Damper
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Solution Overview
Problem
Agricultural harvesters face challenges in accurately sensing stalk diameters while harvesting, leading to inefficiencies in deck plate spacing adjustment, which can result in improper stalk feeding and reduced harvesting performance.
Innovation Solution
A stalk-diameter sensing system comprising deflectable stalk feelers, sensors, and dampers mounted on opposite sides of a stalk-receiving gap, which yieldably bias into contact with stalks to generate signals for accurate diameter measurement and maintain contact during measurement, preventing slapping and distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If stalk feelers are made deflectable and yieldably biased into contact with stalks for diameter sensing, then measurement precision is improved, but the stalk feelers may slap or bounce off stalks causing measurement distortion
Solution Approach 1:
A damper is integrated into the stalk feeler mechanism to provide cushioning before the feeler contacts the stalk. This dampening element absorbs impact energy and prevents the feeler from slapping or bouncing off the stalk, ensuring stable and accurate diameter measurements without compromising the deflectable contact design
2Device complexity
If deck plate spacing is adjusted based on inaccurate stalk diameter sensing, then device complexity is reduced, but harvesting performance deteriorates due to improper stalk feeding
Solution Approach 1:
The patent replaces complex mechanical sensing mechanisms with a simplified deflectable feeler system that uses elastic deflection and optical sensors to measure stalk diameter. This substitution maintains low device complexity while significantly improving measurement accuracy, which enables proper deck plate spacing adjustment and optimal harvesting performance
3Device complexity
If stalk feelers are rigid for structural simplicity, then device complexity is reduced, but measurement precision deteriorates due to inability to conform to stalk surface
Solution Approach 1:
The stalk feeler is designed as a dynamic, deflectable component rather than a rigid structure. The feeler can elastically deform and conform to the stalk surface during contact, allowing simple structural implementation while achieving high measurement precision through controlled deflection that is measured by sensors
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 enables precise stalk diameter measurement, ensuring proper deck plate spacing adjustment and improving the efficiency and accuracy of stalk feeding, reducing mechanical stress and enhancing harvesting performance.
Implementation Method 1
The first damper is positioned to dampen deflection of the first stalk feeler. The second damper is positioned to dampen deflection of the second stalk feeler.
Data Source
AI summary
A stalk-diameter sensing system comprises a first stalk feeler, a second stalk feeler, a first sensor, a second sensor, a first damper, and a second damper. The first and second stalk feelers are deflectably mounted on opposite sides of a stalk-receiving gap that receives a stalk. The first and second stalk feelers are yieldably biased into the stalk-receiving gap for deflection upon contact with an outer surface of the stalk. The first sensor is coupled to the first stalk feeler to sense deflection of the first stalk feeler and generate a first signal. The second sensor is coupled to the second stalk feeler to sense deflection of the second stalk feeler and generate a second signal. The first damper is positioned to dampen deflection of the first stalk feeler. The second damper is positioned to dampen deflection of the second stalk feeler.