Pneumatic Cutter Concealed Blade Harvesting
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Solution Overview
Problem
Current automation systems for harvesting fruits and fruit vegetables face challenges in reducing surface damage during harvesting, sorting, and storage, leading to reduced marketability and increased labor costs due to the difficulty in applying automation effectively.
Innovation Solution
A pneumatic cutter with a concealed blade that uses pneumatic pressure to protrude a blade only when cutting, minimizing surface contact and damage by employing a pouch made of elastomer with a variable portion that expands outward upon pressure application, allowing the blade to move along a curved path for precise cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a blade is exposed for cutting operations, then cutting efficiency is improved, but surface damage to crops increases
Solution Approach 1:
The blade is integrated into a pneumatic pouch that dynamically changes shape between inflated and deflated states. When inflated, the pouch conceals the blade; when deflated, the blade protrudes for cutting. This dynamic transformation allows the system to switch between protection mode and cutting mode, resolving the contradiction between surface damage prevention and cutting efficiency.
Solution Approach 2:
The pneumatic pouch acts as an intermediary between the blade and the crop surface. It provides a cushioning layer that prevents direct contact between the blade and crop during approach and positioning, while still allowing the blade to reach the crop for cutting when the pouch is deflated. This intermediary structure enables both protection and effective cutting.
2Extent of automation
If automation systems are applied for harvesting, then labor costs are reduced, but surface damage to crops increases
Solution Approach 1:
The pneumatic pouch is made of flexible material that can deform and adapt to the crop surface. This flexible shell allows the automated cutter to approach crops gently without rigid contact, reducing surface damage while maintaining automation. The pouch conforms to the crop shape, providing a soft interface between the automated system and the delicate crop surface.
Solution Approach 2:
The automated cutting system uses dynamic pneumatic control to adjust the pouch shape and blade position in real-time. This dynamic adjustment allows the automated system to adapt to different crop positions and orientations, enabling precise cutting while minimizing contact with the crop surface, thus reducing surface damage.
3Object-affected harmful factors
If the blade is concealed in the pouch, then surface damage is reduced, but cutting precision may be compromised
Solution Approach 1:
The blade is extracted from the pouch only when needed for cutting. The pneumatic system controls the pouch deflation to expose the blade precisely at the moment of cutting, ensuring that the blade is concealed during approach (reducing surface damage) but fully exposed during the cutting action (maintaining cutting precision).
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 pneumatic cutter effectively reduces surface damage during harvesting, enhancing the marketability of crops and reducing labor costs by enabling efficient, automated cutting without manual intervention, thus promoting unmanned crop harvesting systems.
Implementation Method 1
a pouch in which an inner space filled with air is formed and which includes a variable portion configured to, upon a pneumatic pressure being applied to an inner portion of the pouch, protrude outward as the inner space expands
Implementation Method 2
In a case where the pneumatic pressure is not applied to the inner portion of the pouch in a state in which the variable portion is protruding outward, the pouch may be elastically restored so that the variable portion is concavely recessed inward
Data Source
AI summary
A pneumatic cutter with a concealed blade includes a pouch in which an inner space filled with air is formed and which includes a variable portion configured to, upon a pneumatic pressure being applied to an inner portion of the pouch, protrude outward as the inner space expands and, in a case where the pneumatic pressure is not applied to the inner portion of the pouch, be concavely recessed inward as the inner space contracts; and a blade installed at the variable portion and configured to, upon the variable portion protruding outward due to the pneumatic pressure being applied to the inner portion of the pouch, protrude toward an object to be cut and cut the object to be cut.