Cigarette Quality Monitoring via Optical Inspection Feedback
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Solution Overview
Problem
Current methods for quality control in tobacco product manufacturing, particularly for cigarettes, rely on manual sampling and testing, which are costly, unreliable, and slow, and in-line optical inspections are not trustworthy due to high machine speeds.
Innovation Solution
A monitoring and control system that includes an auxiliary inspection unit with a sampling device, optical sensors, and a network for automatic quality checking and feedback control, enabling real-time inspection and adjustment of cigarette production machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If manual sampling and testing is used for quality control, then quality inspection can be performed with simple equipment, but the response time is lengthy and labor costs are high
Solution Approach 1:
The patent replaces manual mechanical inspection with an automated optical inspection system that uses cameras and image processing to detect cigarette defects. This substitution eliminates the need for manual sampling and testing, reducing response time from minutes to seconds while maintaining inspection accuracy.
Solution Approach 2:
The inspection system performs self-diagnosis and automatic adjustment of machine parameters based on detected defects. The system monitors its own performance and makes corrections without human intervention, enabling continuous operation at high speed while maintaining quality standards.
2Reliability
If in-line optical inspection is performed at high machine speeds, then productivity is maintained, but the inspection reliability decreases
Solution Approach 1:
The system performs preliminary capture of cigarette images at the optimal inspection point before the cigarettes move to subsequent processing stages. By capturing images at this critical moment and performing rapid image processing, the system ensures reliable defect detection without slowing down the production line.
Solution Approach 2:
The inspection system provides real-time feedback to the cigarette making machine, allowing for immediate correction of detected defects. This closed-loop control ensures that quality issues are addressed instantly, maintaining high inspection reliability even at elevated production speeds.
3Measurement precision
If manual quality testing is performed by skilled operators, then inspection accuracy can be maintained, but labor costs increase
Solution Approach 1:
The patent replaces skilled human operators with an automated optical inspection system that uses multiple cameras, lighting systems, and image processing algorithms. This system maintains or exceeds the inspection accuracy of manual testing while eliminating the need for skilled labor and reducing operational costs.
4Reliability
If sampling frequency is increased to improve detection coverage, then quality monitoring improves, but the cost and time consumption increase
Solution Approach 1:
The inspection system operates continuously, inspecting every cigarette or a high percentage of cigarettes as they pass through the production line. This continuous inspection provides comprehensive quality monitoring without the need for periodic sampling, ensuring consistent detection of defects while maintaining production flow.
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 costs and improves response times by enabling automatic, reliable quality control and real-time adjustments, enhancing the consistency and quality of tobacco products.
Implementation Method 1
a sampling device (46) designed to direct a single cigarette (2) into the auxiliary inspection unit (45)
Implementation Method 2
optical means (74) for inspecting the entire surface of each single cigarette (2)
Implementation Method 3
a first arm (56) equipped with suction means
Data Source
AI summary
Tobacco products (2), typically cigarettes, are manufactured on a line (1) including a cigarette maker (3) and a filter tip attachment machine (4), both equipped with a number of production devices and units connected to respective master control units (82, 83) and visual display units (84). Key characteristics of sample tobacco products (2) are tested by an auxiliary inspection unit (45) forming part of a monitoring and control system associated with the manufacturing line (1), and connected up to a common interface network (48) so that signals reflecting the monitored characteristics can be fed back to a number of control units (81) associated respectively with the devices and the units of the line (1) on which the characteristics in question depend, and programmed to pilot corrective actions in response to the feedback signal.