Non-Contact Fiber Orientation Evaluation via Thermal Response
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Solution Overview
Problem
Existing methods for evaluating fiber orientation in carbon fiber reinforced composite materials, such as XCT and tensile tests, require physical contact and are time-consuming, making them unsuitable for in-line measurement in manufacturing processes.
Innovation Solution
A non-contact orientation evaluation device that uses a heating portion to periodically irradiate a sample with light, detecting the temperature distribution changes and outputting information on the orientation of materials based on the response delay, allowing for quick and accurate evaluation of fiber orientation and thermal properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If XCT test or tensile test is applied for fiber orientation evaluation, then measurement accuracy is improved, but measurement time increases and device complexity increases
Solution Approach 1:
The patent replaces mechanical contact-based measurement systems (XCT test, tensile test) with a non-contact optical measurement system. The heating portion uses light to heat the sample, and the detecting portion detects temperature distribution changes optically, eliminating the need for physical contact and complex mechanical test setups, thereby reducing measurement time while maintaining evaluation accuracy
Solution Approach 2:
The patent changes the measurement parameter from mechanical properties (in tensile test) or structural imaging (in XCT) to thermal response characteristics. By measuring temperature distribution changes and response delay in response to periodic heating, the system evaluates fiber orientation through thermal diffusivity differences caused by anisotropic thermal conductivity, achieving quick and accurate measurement
2Measurement precision
If XCT test or tensile test is applied for fiber orientation evaluation, then measurement accuracy is improved, but device scale increases
Solution Approach 1:
The patent replaces complex mechanical test systems (tensile testing machines) and large-scale imaging systems (XCT equipment) with a compact optical measurement system. The heating portion and detecting portion can be implemented with standard optical components, significantly reducing device scale and complexity while enabling in-line measurement integration
Solution Approach 2:
The patent uses optical copying of thermal radiation from the sample surface to obtain temperature distribution information without physical contact. The detecting portion captures the thermal signature emitted by the heated sample, creating an optical copy of the thermal state that reveals fiber orientation through anisotropic heat diffusion patterns
3Productivity
If non-contact measurement method is used, then measurement speed is improved and device complexity is reduced, but measurement capability must be maintained
Solution Approach 1:
The patent measures thermal response parameters (temperature distribution, response delay) that are directly influenced by fiber orientation through anisotropic thermal conductivity. By analyzing the spatial and temporal characteristics of thermal diffusion, the system accurately determines fiber orientation angles and distribution without contact, maintaining measurement precision while achieving high speed
Solution Approach 2:
The heating portion applies periodic heating to the sample, creating oscillating temperature fields that enhance the detectability of anisotropic thermal conductivity. The periodic modulation allows the detecting portion to measure response delay and temperature amplitude variations that directly correlate with fiber orientation, improving measurement accuracy through dynamic thermal excitation
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
Enables rapid, non-contact evaluation of fiber orientation and thermal properties, improving measurement efficiency and accuracy, and enabling in-line measurement in manufacturing processes.
Implementation Method 1
a heating portion configured to periodically irradiate a sample with light to heat the sample
Implementation Method 2
a detecting portion configured to detect delay in response to a change in a temperature distribution of an area of the sample
Data Source
AI summary
An orientation evaluation device includes: a diode laser configured to periodically irradiate a sample with light to heat the sample, the sample being carbon fiber reinforced plastics; an infrared thermography configured to detect delay in response to a change in a temperature distribution of an area of the sample, the area including a spot heated by the diode laser; and a computer configured to output information on orientation of the sample based on the delay in the response detected by the infrared thermography. The orientation evaluation device enables a non-contact and quick evaluation of the orientation of the sample.