Multifilter Segment Inspection via CIELab Color Differentiation
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Solution Overview
Problem
The inspection of multifilter segments is affected by physical properties other than opacity, making it difficult to accurately detect the length and face-to-face state of filter segments, especially when high-opacity inner wrappers are manufactured at high speeds, leading to increased cleaning frequencies.
Innovation Solution
A multifilter segment design where adjacent inner wrappers have different CIELab color parameters, allowing for the use of specific light colors to measure transmitted light intensity ratios, which helps in accurately determining the length and face-to-face state of filter segments by selecting combinations with a ratio of 1.6 or greater, and using an outer wrapper that does not affect color transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If high-opacity inner wrappers are used to improve visual cleanliness, then the multifilter segment appearance is improved, but inspection accuracy deteriorates due to inability to detect filter segment length and face-to-face state
Solution Approach 1:
The patent applies color changes by assigning different CIELab color parameters to adjacent inner wrappers. This allows the wrappers to maintain high opacity for visual cleanliness while enabling optical detection through color differentiation. The colored opaque or translucent material permits light transmission that varies by color, enabling inspection systems to detect filter segment characteristics through color-based optical measurement.
Solution Approach 2:
The patent uses composite materials by combining opaque or translucent material with colorants to create inner wrappers that simultaneously achieve high opacity for aesthetic purposes and color differentiation for inspection purposes. This composite approach allows both visual cleanliness and measurement precision to be satisfied.
2Productivity
If high-opacity inner wrappers are manufactured at high speed, then productivity is improved, but measurement precision deteriorates due to physical property variations affecting inspection
Solution Approach 1:
By incorporating colorants into the inner wrapper material, the patent creates a measurable physical property (color) that remains consistent even when manufacturing speed varies. This allows inspection systems to reliably detect filter segment characteristics through color-based optical measurement, maintaining measurement precision despite high-speed production variations in other physical properties.
3Adaptability or versatility
If multiple filter segments are arranged face-to-face to create multifilter segment, then filter functionality is improved, but device complexity increases leading to higher defect probability
Solution Approach 1:
The patent applies color changes to adjacent inner wrappers as a simple visual differentiation method that does not increase structural complexity. This allows the multifilter segment to maintain its functional benefits while using a straightforward color-coding approach for inspection, avoiding complex mechanical or electronic identification systems.
4Measurement precision
If different CIELab color parameters are assigned to adjacent inner wrappers, then inspection accuracy is improved through color-based detection, but manufacturing complexity increases
Solution Approach 1:
The patent implements color changes by incorporating colorants into the inner wrapper material during the manufacturing process. This approach integrates the differentiation feature directly into the material production, avoiding the need for separate post-manufacturing steps or complex assembly processes, thereby limiting the increase in manufacturing complexity.
Solution Approach 2:
The patent changes the color parameter (CIELab values) of the inner wrapper material as a simple manufacturing variable. By adjusting colorant concentration or type during material production, the desired color differentiation is achieved through a straightforward parameter change rather than complex structural modifications.
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 method improves the detectability of filter segment lengths and face-to-face states, enhancing the accuracy of multifilter segment inspection and reducing cleaning frequencies by utilizing distinct color parameters and light intensity ratios.
Implementation Method 1
causing red, blue or green light or light having a combination of two or more types to pass through each of the filter segments to be adjacent to each other, and measuring a transmitted light intensity ratio in each color
Implementation Method 2
The inner wrappers of the adjacent filter segments have CIELab color parameters different from each other... measuring a transmitted light intensity ratio in each color
Data Source
AI summary
This multifilter segment is provided with a plurality of filter segments provided with a plurality of filter materials and inner wrappers respectively covering the outer surfaces of the plurality of filter materials, and an outer wrapper which connects and integrates the plurality of filter segments by being wound around the outer surfaces of the inner wrappers of the plurality of filter segments while the ends of the plurality of filter segments are arranged face-to-face. The inner wrappers of adjacent filter segments have a mutually different CIELab color parameter.