Cigarette Inspection Device Gravity Center Verification
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Solution Overview
Problem
Current image inspection devices for cigarette bundles often fail to reliably detect shortages due to duplicative recognition issues, leading to incomplete bundles being packaged, which is costly and disrupts production when trying to replace or update the inspection algorithm.
Innovation Solution
A cigarette inspection device that analyzes images of filter end faces using both contour detection and gravity center position analysis to determine the number of cigarettes and identify duplicative recognition, ensuring accurate detection of shortages by comparing distances between gravity center positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a pattern-search inspection algorithm is used to count cigarettes in a bundle, then the inspection process is simple and widely applicable, but duplicative recognition occurs causing false determination that one cigarette is two
Solution Approach 1:
The patent introduces an intermediary verification step using gravity center position analysis. Instead of directly trusting the contour-based count, the system uses gravity centers as a mediator to verify whether the detected contours correspond to actual cigarettes. The gravity center positions are compared against expected spacing patterns, and if they deviate beyond a threshold, duplicative recognition is detected and the bundle is rejected.
2Measurement precision
If a more reliable inspection algorithm is introduced to replace the current pattern-search algorithm, then duplicative recognition can be avoided, but long-term shutdown of the factory and high costs are required
Solution Approach 1:
The patent applies partial action by adding only a specific verification step (gravity center analysis) to the existing inspection system rather than replacing the entire algorithm. This partial enhancement provides the necessary reliability improvement while maintaining compatibility with the current system architecture, avoiding factory shutdown and expensive system replacement.
3Productivity
If the current inspection system is used without modification, then production continues without interruption, but bundles with shortage of cigarettes are packaged reducing product quality
Solution Approach 1:
The patent implements feedback by using gravity center position analysis to verify the accuracy of contour-based cigarette detection. The system continuously monitors the spacing between gravity centers and compares it against expected patterns. When duplicative recognition is detected through this feedback mechanism, the system automatically rejects the affected bundles, ensuring quality control while maintaining continuous production of合格 products.
Data Source
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AI summary
A cigarette inspection device designed to obtain an image showing filter end faces of a bundle C of filtered cigarettes arranged side by side with their axes parallel to one another, analyze the image and determine whether the bundle is short of filtered cigarettes comprises a first determination section which determines how many filtered cigarettes are arranged side by side from contours of filter end faces in the image generated, and determines whether the bundle consists of a predetermined number of filtered cigarettes, and a second determination section which determines whether the first determination section has falsely recognized one cigarette as two.