Punch and Die Plant Sampling Device with Dynamic Rod
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Solution Overview
Problem
Existing sampling systems for agricultural plants face challenges in consistently collecting plant samples without clogging and contamination, especially in varying ambient conditions, which complicates the identification of genetic markers for marker-assisted breeding in large-scale operations.
Innovation Solution
A device featuring a punch and die mechanism with a cylindrical punch tube and coaxially positioned punch rod, driven by a cam block and yoke mechanism, which includes a link rod for controlled movement and an irrigation system to prevent clogging by periodically applying water or solvent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a punch and die mechanism is used to collect plant samples, then sample collection efficiency is improved, but the mechanism becomes prone to clogging and contamination
Solution Approach 1:
The punch rod is designed to move dynamically between a first position (retracted into the punch tube) and a second position (extended beyond the punch tube). This dynamic positioning allows the punch rod to be withdrawn after cutting, preventing plant material from becoming trapped between the punch rod and punch tube wall, thereby eliminating clogging while maintaining high sample collection efficiency
Solution Approach 2:
The sampling mechanism is divided into separate functional components: the punch tube for cutting, the punch rod for material removal, and the link rod for coordinated movement. This segmentation allows each component to perform its specific function independently, with the punch rod being retractable to prevent contamination and clogging while the punch tube remains stationary for precise cutting
2Device complexity
If the punch rod remains stationary relative to the punch tube, then the mechanism structure is simplified, but plant material accumulates causing clogging
Solution Approach 1:
The link rod connects the punch rod to the actuating mechanism, enabling the punch rod to move relative to the punch tube during operation. This relative movement is essential for preventing plant material accumulation, as the punch rod can be withdrawn after cutting to clear the cutting area, thereby eliminating clogging while maintaining reasonable structural complexity through the link rod mechanism
3Quantity of substance
If samples are collected from thousands of plants, then genetic marker diversity is improved, but identification and processing complexity increases
Solution Approach 1:
The punch mechanism is designed to automatically collect samples from multiple plants through repetitive cycling, with the punch rod automatically retracting and resetting between cuts. This self-service capability allows high-volume sample collection (thousands of plants) without requiring complex manual identification procedures, as the mechanism itself performs the repetitive sampling task efficiently
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
Ensures consistent and efficient sample collection from plants, preventing clogging and contamination, and facilitating reliable operation over multiple cycles, even in challenging environmental conditions.
Implementation Method 1
an irrigation system to prevent clogging by periodically applying water or solvent
Data Source
AI summary
A device for collecting plant samples includes a punch and die mechanism for taking leaf plugs from plants. The punch itself includes a punch rod coaxially mounted inside a punch tube. In use, the punch tube has a distal end with two, diametrically opposed projections that interact with the formed aperture to cut a plug from a plant leaf. The punch rod then follows to remove a cut leaf plug from the formed aperture. Also included is a hydraulic subsystem for periodically delivering liquid on the punch and die mechanism to prevent plant debris from clogging the device.