Simulated Eggshell Stress Testing for Crack-Resistant Perforation
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Solution Overview
Problem
The existing methods for perforating eggshells during vaccine cultivation in chicken embryos often result in cracks, leading to contamination and economic loss due to the small size and curvature of the egg, making it difficult to attach stress detectors accurately.
Innovation Solution
A simulated eggshell perforation test device with an enlarged eggshell and stress detectors is used to detect stress at preset positions, allowing for optimal perforation conditions to minimize cracks, featuring a marble-launching mechanism and detection devices for stress and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an impact head is used to perforate the eggshell, then the perforation process is simple, but cracks occur in the eggshell leading to contamination and cultivation failure
Solution Approach 1:
The patent applies preliminary action by first creating a small opening at the air chamber position before needle insertion. The process involves: (1) positioning the impact head at the air chamber location, (2) perforating to create a small opening, (3) then inserting the needle through this pre-created opening. This preliminary opening creation prevents the needle from causing cracks during direct insertion, thereby maintaining eggshell integrity while keeping the process simple.
2Measurement precision
If a stress detector is attached to the actual egg to detect stress, then the detection is direct, but the small size and curvature of the egg make accurate attachment difficult
Solution Approach 1:
The patent applies copying by creating a scaled-up simulated eggshell model (enlarged multiple times proportionally) that replicates the structural characteristics of the actual eggshell. The stress detector is attached to this enlarged model where attachment is feasible, and the detection data is then used to infer stress conditions in the actual egg during perforation. This copying approach enables accurate stress detection while avoiding the attachment difficulties of the small actual egg.
Solution Approach 2:
The patent applies dimensionality change by transitioning from the small-scale three-dimensional actual egg to a large-scale simulated model. By enlarging the eggshell model multiple times proportionally, the system changes the dimensional scale, making the surface area sufficient for accurate stress detector attachment while maintaining the structural characteristics needed for valid stress measurement.
3Ease of operation
If the eggshell is enlarged multiple times to attach stress detectors, then the detector attachment is feasible, but the device becomes a simulation model rather than the actual egg
Solution Approach 1:
The patent creates a scaled-up copy of the eggshell model with proportional enlargement multiple times. This simulated eggshell model maintains the structural characteristics of the actual eggshell while providing sufficient surface area for stress detector attachment. The model includes key features like the air chamber position, allowing valid stress measurement that can be extrapolated to the actual egg perforation process.
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 device reduces crack occurrence by determining suitable perforation parameters, enhancing research on eggshell mechanics and reducing waste embryo rates.
Implementation Method 1
a stress detector is disposed on the simulated eggshell, and the stress detector is configured to detect stress at a preset stress detection position of the simulated eggshell
Implementation Method 2
the marble-launching mechanism launches the marble towards the preset perforation position of the simulated eggshell and causes the marble to perforate the simulated eggshell
Implementation Method 3
the elastic member compression detection device is configured to detect a compression amount of the elastic member
Data Source
AI summary
The present application provides a simulated eggshell perforation test device, which includes a simulated eggshell and a perforation device for perforating at a preset perforation position of the simulated eggshell. The simulated eggshell is an eggshell that is enlarged multiple times in proportion to an egg, thereby solving the problem that due to small size of the egg, the stress detector cannot be attached to a surface of the egg or has inaccurate detection data after attaching. The simulated eggshell is enlarged proportionally, its size is much larger than the egg, such that it is easier to attach the stress detector. After the stress detector is attached on the simulated eggshell, the perforation device is used to perforate the simulated eggshell. Based on the data detected by the stress detector, the most suitable perforation condition is figured out to reduce the occurrence of crack during eggshell perforation.