基于涡流热成像的表面缺陷定量分析仿真

仪向向; 曾金晶; 杨随先

基于涡流热成像的表面缺陷定量分析仿真

四川大学制造科学与工程学院, 成都 610065

基金项目:

国家自然科学基金资助项目(51275325)

详细信息

作者简介:
仪向向(1990-),女,硕士研究生,主要从事电磁无损检测与产品设计研究工作.

中图分类号: TG115.28
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出版历程
- 收稿日期: 2014-06-18
- 刊出日期: 2015-04-09

Simulation Study on Quantitative Analysis for Surface Crack Detection with Eddy Current Thermography

摘要

摘要: 缺陷几何参数的定量评估是涡流热成像无损检测技术有待突破的技术难点.运用COMSOL仿真平台建立了金属平板表面裂纹涡流热成像检测的电热耦合仿真模型,分别获取了加热与降温阶段的热图像序列,经由Matlab图像处理提取缺陷顶端和中点处的温升变化曲线.通过对在零件表面缺陷中点处温度值与缺陷长度、深度的对应关系的拉格朗日插值,给出了缺陷深度定量化评估的方法.
- 涡流热成像 /
- 表面裂纹缺陷 /
- 定量分析 /
- 仿真研究
Abstract: Quantitative analysis of cracks is the critical issue for eddy current thermography to make a breakthrough progress.The simulation models of surface cracks coupling Joule heating with heat transfer have been established via COMSOL software.Sequential thermal images have been obtained during the heating and cooling periods of the test process.By the aid of Matlab toolbox, the surface temperature distributions on the tip and centre point of the cracks have been extracted.Lagrange interpolation has been employed to quantitate crack depth.The crack depth is calculated by Lagrange interpolation with the lengths and depths of cracks.The proposed method has been validated by the simulation results.
- Eddy current thermography /
- Surface crack /
- Quantitative analysis /
- Simulation study

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参考文献(12)

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基于涡流热成像的表面缺陷定量分析仿真

作者简介: 仪向向(1990-),女,硕士研究生,主要从事电磁无损检测与产品设计研究工作.

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出版历程

Simulation Study on Quantitative Analysis for Surface Crack Detection with Eddy Current Thermography

计量

出版历程

目录

作者简介:
仪向向(1990-),女,硕士研究生,主要从事电磁无损检测与产品设计研究工作.