Conductivity-Guided Cork Stripping Head for Depth Control
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Solution Overview
Problem
Mechanized cork extraction from cork oak trees is not industrialized, and existing systems are bulky, complex, and require two-handed operation, making them difficult to use, especially for varying tree complexities and reducing efficiency due to high power consumption and lubrication needs.
Innovation Solution
A tree bark stripping machine with a vibration or microvibration cutting element, incorporating conductivity measurement layers and an electronic control unit to automatically stop cutting before reaching the inner phelloderm layer, powered by an internal or external energy source, and featuring a coupling head and adjustable rotating head for easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a chainsaw is used for cork extraction, then cutting power is sufficient, but the device becomes bulky, complex, and requires high power consumption with essential lubrication
Solution Approach 1:
The patent replaces the traditional chainsaw mechanical cutting system with a vibration-based cutting element. The cutting element vibrates at high frequency to cut the bark, eliminating the need for a heavy chainsaw engine, fuel system, and lubrication mechanisms while maintaining effective cutting capability. This substitution reduces device complexity and power consumption while preserving the cutting function.
2Measurement precision
If reference electrodes and cables are positioned for conductivity measurement, then cork layer detection is achieved, but the system becomes bulky and complex to use
Solution Approach 1:
The patent integrates the conductivity measurement electrodes directly into the cutting element itself. The cutting element incorporates conductive layers that function as both the cutting tool and the measurement sensor. This merging eliminates the need for separate reference electrodes, cables, and associated wiring, thereby reducing system complexity while maintaining measurement precision for detecting the cork layer thickness.
Solution Approach 2:
The cutting element serves multiple functions simultaneously: it acts as the mechanical cutting tool for removing bark and as the conductivity measurement sensor for detecting cork layer thickness. This multi-functionality eliminates the need for separate detection systems, reducing overall system complexity while maintaining both cutting effectiveness and measurement accuracy.
3Manufacturing precision
If a pusher motor and pusher are added for two-handed operation, then cork layer cutting control is improved, but operation becomes more difficult and physically demanding
Solution Approach 1:
The patent employs a single-handed operation system where the operator holds and controls the entire device with one hand. The vibration-based cutting element automatically cuts the bark to the appropriate depth based on the conductivity measurements, eliminating the need for a separate pusher motor and two-handed operation. This self-service approach simplifies operation while maintaining cutting depth control through electronic sensing and automatic adjustment.
4Ease of operation
If traditional axe method is used, then simplicity is maintained, but skill and dexterity requirements are high and safety requirements are not met
Solution Approach 1:
The patent replaces the manual axe-cutting method with a controlled vibration-based cutting system. The vibration element provides precise, consistent cutting action that eliminates the need for high operator skill and dexterity. The system includes safety features such as controlled depth limitation through conductivity measurement and automatic shutdown when the cork layer is fully removed, thereby meeting safety requirements while maintaining operational simplicity.
Solution Approach 2:
The system incorporates real-time conductivity measurement feedback to monitor the cutting depth and cork layer thickness. When the conductivity indicates that the cutting element is approaching the parent layer or when the cork layer is fully removed, the system automatically adjusts or stops the cutting action. This feedback mechanism ensures safe operation without requiring high operator skill while maintaining simplicity of use.
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 machine allows for precise and efficient cork extraction with reduced physical effort, simpler operation, and adaptability to different tree types, ensuring the inner phelloderm layer is not damaged, thus improving safety and productivity.
Implementation Method 1
The electronic cork layer detection system determines the position of the chainsaw cutting element based on the conductivity measurement between the chainsaw guide on which an electrode is fixed and the reference established by the double reference needle system
Implementation Method 2
a vibration or microvibration cutting machine, a coupling head and a cutting element
Data Source
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AI summary
A tree bark stripping machine comprising a cutting machine (1) by vibrations or microvibrations, a coupling head (2) and a cutting element (3) comprising at least two conductivity measuring layers, wherein: a. The at least two conductivity measuring layers are arranged on the cutting element (3) so as to be in contact with the bark being stripped, each measuring layer being isolated from at least one other measuring layer, and b. The electronic control unit (1d) is designed to control a controlled relay (1c) in order to interrupt the power supply to the motor (1a) by the energy source as a function of a conductivity measurement made via the at least two measuring layers, the electronic control unit (1d) interrupting the cutting before reaching the parent layer (5) of the stripped tree determined by the conductivity measurement.