Functional Fabric Wear Assessment Using Optical Correlation
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Solution Overview
Problem
Current methods for assessing the remaining functionality of functional fabrics are often expensive, time-consuming, destructive, and require specialized equipment, failing to provide a simple, non-destructive, and field-applicable means to evaluate functionality across multiple locations of a fabric, especially for water-repellent and insect-protective fabrics.
Innovation Solution
A method using optical measurements with a light source and detector to correlate fabric wear with functionality, employing reflectance and transmittance analysis, potentially combined with fractal analysis, to determine the remaining functionality of functional fabrics without damaging them, utilizing a smartphone and micro-lens attachment for imaging and data analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If chemical analysis methods are used to quantify remaining additive, then the quantity of additive is measured, but the method requires expensive reagents and analytical instruments that are not readily available in the field
Solution Approach 1:
The patent replaces complex chemical analysis systems with simple optical detection systems. Instead of using chemical reagents and analytical instruments, the invention uses light sources and detectors to measure optical properties (transmittance, reflectance) of the fabric, which correlate with the amount of remaining additive. This substitution enables field-deployable functionality assessment without requiring laboratory equipment.
Solution Approach 2:
The patent creates an optical copy or proxy measurement of the additive quantity. Rather than directly measuring the chemical presence of the additive, the system measures optical properties of the fabric that serve as proxies for additive concentration. The optical measurements correlate with additive quantity, providing an indirect but sufficient assessment for field use.
2Measurement precision
If direct function testing methods are used (e.g., water penetration tests, insect bite tests), then the actual functionality is measured, but the methods are expensive, time-consuming, and may damage the fabric
Solution Approach 1:
The patent replaces time-consuming direct function tests with rapid optical measurements. Instead of performing water penetration tests or insect bite tests that require extended time and resources, the system uses light-based measurements that provide immediate results. The optical properties measured correlate with fabric functionality, enabling rapid assessment without the time and resource expenditure of direct testing.
Solution Approach 2:
The patent employs inexpensive, portable optical components (light sources, detectors, smartphone integration) that can be deployed in the field without requiring expensive laboratory infrastructure. These simple devices provide sufficient measurement capability for field use, replacing the need for costly and time-consuming laboratory-based direct function tests.
3Measurement precision
If current test methods are used, then functionality is assessed at a single location, but the fabric may have non-uniform wear and functionality varies across different areas
Solution Approach 1:
The patent creates a universal assessment tool that can evaluate functionality at multiple locations on the fabric using the same portable optical device. The system is designed to be adaptable to different test locations (front, back, sleeves, knees, elbows) without requiring different equipment or procedures. This multi-location capability provides a comprehensive assessment of fabric functionality across the entire garment.
Solution Approach 2:
The patent enables segmentation of the fabric into multiple test locations for independent assessment. By measuring optical properties at different locations (front, back, sleeves, knees, elbows), the system identifies spatial variations in fabric functionality and wear. This segmented approach reveals non-uniform degradation patterns that single-location tests would miss.
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 allows for rapid, non-destructive assessment of functional fabric integrity, correlating optical measurements with the remaining functionality, enabling effective evaluation of fabrics' insect repellency and antimicrobial activity, even in field conditions, with high precision and practicality.
Implementation Method 1
measuring the reflectance of the light source off of the functional fabric
Implementation Method 2
measuring the transmittance of the light source through the functional fabric
Data Source
AI summary
The present invention provides a method for determining the functionality remaining in a functional fabric, the method comprising the steps of: providing a used functional fabric having a known original functionality, a current wear, and a current unknown functionality, providing a light source, providing a detector, optically measuring the current wear using the light source and the detector, and evaluating the current unknown functionality using a correlation that expresses the current unknown functionality as a function of the current wear, optionally the detector further comprises a digital camera, and wherein the method further comprises the step of: obtaining a magnified image of the functional fabric and quantifying the fractal dimension using a box-method fractal analysis on the image. The method may be applied the insecticide treated fabrics.