使用锁定温度计补偿方法减少侧面热量流
Johannes Rittmann1, Marc Kreutzbruck2
1Institute for Plastics Technology, University of Stuttgart, Pfaffenwaldring 32, 70569, Stuttgart, Germany.
Scientific reports
|October 10, 2023
概括
活动热学 (AT) 使用热波进行非破坏性测试. 本研究引入了结构化加热,以提高光学锁定热像 (LT) 中的图像清晰度和特征检测.
科学领域:
- 物理 物理学 物理
- 材料科学 材料科学 材料科学
- 非破坏性测试是指非破坏性测试.
背景情况:
- 活性热谱 (AT) 使用表面温度差异来分析材料特性,但由于热波损失,解释是具有挑战性的.
- 当前的AT评估方法通常将3D热流简化为1D,模糊边缘和小特征.
- 侧向热量流和温度梯度使光学锁定热谱 (LT) 中的分析复杂化.
研究的目的:
- 介绍一种用于减少 LT 测量中的侧向热量流和局部温度梯度的新方法.
- 为了提高2D温度场在主动温度学中的解释.
- 为了提高特征检测效率和图像质量在LT.
主要方法:
- 在光学锁定热谱中实现空间和时间结构化的加热.
- 通过减少特征区域的局部温度梯度来最大限度地减少横向热流.
- 将3D热流问题转换为可解决的1D问题.
主要成果:
- 提出的方法有效地减少了横向梯度,将问题简化为1D热扩散场景.
- 该技术绕过了LT的"盲频"限制,使检查不那么依赖激发频率.
- 观察到边缘度和特征分离度的显著改善,提高了检测效率.
结论:
- 结构化加热提供了一种强大的解决方案,可以克服光学锁定热谱的局限性.
- 这种方法提高了材料和组件的非破坏性评估的准确性和效率.
- 该方法有望在各种技术和生物应用中改进缺陷检测和表征.
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