Plant Stalk Capacitance Measurement Centering Mechanism
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Solution Overview
Problem
Detecting internal damage in maize stalks caused by the European Corn Borer is challenging due to its internal nature, making it difficult to quantify without manual, time-consuming examinations.
Innovation Solution
An apparatus with a centering mechanism and probe electrodes is used to non-destructively measure capacitance, allowing for the detection and quantification of internal damage by minimizing misalignment and maintaining consistent contact with the plant stalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual examination is used to detect internal damage, then measurement accuracy is improved, but productivity deteriorates due to time-consuming processes
Solution Approach 1:
The patent replaces manual mechanical examination with an automated electrical measurement system using electrodes and capacitance sensing. The system applies test signals to electrodes in contact with the plant stalk and automatically determines capacitance values to detect internal damage, eliminating the need for time-consuming manual inspection while maintaining measurement accuracy.
2Device complexity
If electrodes are positioned without centering, then device complexity is reduced, but measurement precision deteriorates due to misalignment
Solution Approach 1:
The patent employs a centering mechanism that uses V-shaped features to geometrically constrain the plant stalk position, ensuring the stalk is centered between opposing electrodes. This passive geometric centering approach maintains measurement precision by eliminating misalignment without requiring complex active positioning systems or feedback controls.
3Measurement precision
If firm contact between electrode and plant stalk is maintained, then measurement precision is improved, but the plant stalk may be damaged
Solution Approach 1:
The patent uses spring-loaded electrodes that dynamically adapt their contact force to the plant stalk surface. The springs provide sufficient force to maintain consistent electrical contact for accurate capacitance measurement while automatically adjusting to the stalk's compliance, preventing damage to the living plant tissue through excessive static force.
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 method enables efficient and accurate detection of internal damage by measuring capacitance changes, reducing manual labor and improving the assessment of pest infestation impact.
Implementation Method 1
determining a capacitance of the plant stalk at the location based on the response
Data Source
AI summary
An apparatus configured to perform non-destructive, electrical measurements on a plant stalk to detect and quantify internal damage is disclosed. This apparatus includes features to minimize misalignments that can negatively affect the precision and/or accuracy of the electrical measurements.