Foreign Substance Checking System with Flat Hammer Vibration
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Solution Overview
Problem
Existing foreign substance detection methods in bag-like containers often misidentify cracks in powder as foreign substances due to vibration-induced damage, leading to incorrect identification of defective products.
Innovation Solution
A foreign substance checking system that applies vibration using a rotating shaft and hammers with a flat collision surface to minimize crack generation and ensure accurate image analysis, with a collision area to work area ratio within 1 to 4%, and multiple hammers to enhance foreign substance visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If vibration is applied to the bag-like body to detect foreign substances, then foreign substances buried inside the powder can be made to appear, but cracks are generated in the powder mass which appear as shadows and are misidentified as foreign substances
Solution Approach 1:
The hammer's collision surface is designed with a specific flat geometry that concentrates the vibration impact at a localized area. This localized quality ensures that the vibration is sufficient to make foreign substances appear while minimizing the generation of cracks in the powder mass, thereby resolving the contradiction between detection accuracy and crack generation.
Solution Approach 2:
The invention optimizes the collision area of the hammer relative to the work area (ratio of 1 to 4%) to control the vibration intensity. By adjusting this parameter, the system achieves the right balance where foreign substances become visible through vibration while crack generation is minimized, solving the technical contradiction.
2Measurement precision
If the collision area of the hammer is increased to enhance vibration effect, then foreign substance visibility improves, but crack generation increases leading to more misidentifications
Solution Approach 1:
The invention establishes an optimal parameter range for the collision area to work area ratio (1 to 4%). Within this range, the vibration effect is sufficient to make foreign substances visible while the crack generation remains controlled, preventing false positive identifications. This parameter optimization directly addresses the contradiction between visibility and reliability.
3Device complexity
If a single hammer is used to apply vibration, then the device structure is simple, but the vibration coverage is insufficient and foreign substances may not appear
Solution Approach 1:
The vibration device is segmented into multiple hammers (at least two) that rotate independently on the same shaft. This segmentation allows the vibration to be applied at multiple locations simultaneously, ensuring comprehensive coverage of the powder mass and improving foreign substance detection capability while maintaining relatively simple device structure.
Solution Approach 2:
Multiple hammers share a common rotating shaft mechanism, allowing a single structural element (the shaft) to perform multiple functions by supporting multiple hammers. This multi-functionality approach enhances vibration coverage without proportionally increasing device complexity, resolving the contradiction between structural simplicity and detection capability.
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 system reduces the likelihood of misidentifying cracks as foreign substances, improving the accuracy of detecting actual foreign substances within the container through optical image analysis.
Implementation Method 1
a vibration device configured to apply a vibration to the container... By making the hammer collide with the container to apply a vibration to the container, the foreign substance buried inside the powder can be made to appear
Implementation Method 2
a photography device configured to optically photograph an inside of the container through the transparent region from the outside
Data Source
AI summary
To provide a means that is less likely to misidentify a crack as a foreign substance during an image checking in which a vibration is applied to a powder contained in a bag-like container. A foreign substance checking system includes a vibration device configured to apply a vibration to a container, a photography device configured to optically photograph the inside of the container through a transparent region from the outside, and a determination device configured to determine whether a foreign substance is present inside the container based on an image of the container photographed by the photography device. The vibration device includes a rotating shaft and a hammer rotating in conjunction with the rotating shaft and colliding with the container. A portion of an outer surface of the hammer to abut on the container has a flat surface.