Alternative data evaluation methodology for infrared thermography analogous to the Shock Response Spectrum analysis method

IF 4.1 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Ndt & E International Pub Date : 2024-05-31 DOI:10.1016/j.ndteint.2024.103154

Harutyun Yagdjian, Martin Gurka

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Abstract

We propose an alternative method for processing infrared thermography (IRT) data based on a thermal 1-layer model. The method is based on the analogy of the Shock Response Spectrum (SRS) analysis for mechanical systems (ISO 18431). A thermal Q-factor, similar to the resonance sharpness (Q-factor) of a mechanical oscillator, is introduced as a parameter for selecting a specific thermal 1-layer model. Two main aspects of this method and corresponding properties have been considered: the strictly model-based treatment of this methodology and an empirical introduction of additional bandpass filters. The method is validated with two practical examples: for a homogeneous polymer sheet with blind holes and an inhomogeneous plate made of carbon fiber reinforced polymer (CFRP) with artificial defects, the capability of defect detection is compared with established methods. The comparison of the results with the commonly used data processing methods of IRT as Pulsed Phase Thermography (PPT) and Modified Differential Absolute Contrast (MDAC) shows equivalent or sometimes improved performance.

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类似于冲击响应谱分析方法的红外热成像替代数据评估方法

我们提出了一种基于单层热模型的红外热成像（IRT）数据处理替代方法。该方法以机械系统的冲击响应谱（SRS）分析（ISO 18431）为基础。引入了与机械振荡器共振尖锐度（Q 因子）类似的热 Q 因子，作为选择特定热 1 层模型的参数。我们考虑了该方法的两个主要方面和相应特性：严格基于模型的处理方法和根据经验引入的附加带通滤波器。该方法通过两个实际例子进行了验证：对于带有盲孔的均质聚合物板材和带有人工缺陷的非均质碳纤维增强聚合物（CFRP）板材，缺陷检测能力与已有方法进行了比较。将结果与脉冲相位热成像（PPT）和修正绝对差分对比（MDAC）等常用 IRT 数据处理方法进行比较，结果显示性能相当，有时甚至有所提高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ndt & E International 工程技术-材料科学：表征与测试

CiteScore

7.20

自引率

9.50%

发文量

121

审稿时长

55 days

期刊介绍： NDT&E international publishes peer-reviewed results of original research and development in all categories of the fields of nondestructive testing and evaluation including ultrasonics, electromagnetics, radiography, optical and thermal methods. In addition to traditional NDE topics, the emerging technology area of inspection of civil structures and materials is also emphasized. The journal publishes original papers on research and development of new inspection techniques and methods, as well as on novel and innovative applications of established methods. Papers on NDE sensors and their applications both for inspection and process control, as well as papers describing novel NDE systems for structural health monitoring and their performance in industrial settings are also considered. Other regular features include international news, new equipment and a calendar of forthcoming worldwide meetings. This journal is listed in Current Contents.