Fiber-Reinforced Plastic Recognition Using Inherent Fiber Patterns
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Solution Overview
Problem
Existing methods for individual recognition of fiber-reinforced plastics require expensive dedicated marking devices and cannot distinguish between identical products after shipment, limiting their applicability and effectiveness.
Innovation Solution
A method for individual recognition of fiber-reinforced plastics using unique appearance information, such as the pattern of randomly arranged discontinuous fibers, without the need for dedicated marking devices, by capturing and collating identification information images before and after shipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If laser marking with QR code is used for individual authentication, then individual recognition capability is achieved, but expensive dedicated marking devices are required and marking traces remain on the product surface
Solution Approach 1:
The fiber-reinforced plastic itself provides the identification features through its inherent fiber distribution pattern, eliminating the need for external marking devices. The material's natural characteristics serve as the identification medium, making the system self-sufficient without requiring additional expensive equipment.
Solution Approach 2:
The identification function is extracted from the product surface by using the internal fiber distribution pattern visible through transparency, rather than adding external markings. This removes the need for surface marking devices and leaves the product surface unmarked.
2Reliability
If QR code marking is applied, then individual authentication is possible, but the marking trace affects product appearance and limits application
Solution Approach 1:
The identification information is extracted from the product's internal structure (fiber distribution pattern) rather than being added to the surface. This eliminates surface markings while preserving authentication capability, as the fiber pattern is visible through the transparent product without requiring surface alterations.
Solution Approach 2:
The identification is achieved through the visual characteristics of the fiber distribution pattern visible through the transparent product, rather than through surface color markings. This maintains product appearance while enabling identification.
3Loss of information
If conventional image processing is used for object identification, then different types of objects can be recognized, but identical products cannot be distinguished after shipment
Solution Approach 1:
Instead of relying on overall product characteristics, the system uses the local and unique fiber distribution pattern within each product as the identification feature. This local quality variation enables distinction between individual products of the same type, providing both type recognition and individual tracking capabilities.
Solution Approach 2:
The fiber distribution pattern creates inherent asymmetry and uniqueness in each product, even among identical items. This natural variation provides distinguishable features for individual tracking while maintaining the ability to recognize product types through overall pattern characteristics.
Data Source
AI summary
This method for individual recognition of fiber-reinforced plastic comprises the following steps. Step 101 is a step for: acquiring identification information in advance for a fiber-reinforced plastic in order to acquire an identification information image P1; and creating a database in which manufacturing information for the fiber-reinforced plastic is associated with the identification information image P1 and stored. Step 201 is a step for, after Step 101, acquiring identification information for a fiber-reinforced plastic in order to acquire an identification information image P2. Step 301 is a step for comparing the acquired recognition information image P2 to the recognition information image P1 stored in the database in order to perform individual recognition of the fiber-reinforced plastic, with the caveat that a resin M1 contained in the fiber-reinforced plastic in Step 101 has a greater number average molecular weight than a resin M2 contained in the fiber-reinforced plastic in Step 201.