基于补偿的全填热均质化,用于长脉冲热图成像中的对比度增强
Yoonjae Chung1, Chunyoung Kim2, Seongmin Kang2
1Eco-Sustainable Energy Research Institute, Kongju National University, 1223-24 Cheonan-daero, Seobuk-gu, Cheonan-si 31080, Republic of Korea.
Sensors (Basel, Switzerland)
|April 12, 2025
概括
本研究介绍了一种先进的热图检查技术,使用素阵列灯和补偿方法来改善地下缺陷检测. 增强的信号噪声比率可以更准确地确定工业部件的缺陷大小.
科学领域:
- 材料科学 材料科学 材料科学
- 工程 工程师 工程师 工程师
- 非破坏性测试是指非破坏性测试.
背景情况:
- 非破坏性测试 (NDT) 对工业安全至关重要.
- 长脉冲热学 (LPT) 是有效的地下缺陷检测.
- 不均的激发和噪声限制LPT精度.
研究的目的:
- 为了提高温度检查中的缺陷检测可靠性.
- 为不均的热负荷开发补偿方法.
- 为了提高信号噪声比 (SNR) 和缺陷大小精度.
主要方法:
- 使用素阵列 (HA) 灯进行热激发.
- 实现绝对温度补偿 (ATC) 和温度率补偿 (TRC).
- 在具有人工地下缺陷的模型样本上验证了该技术.
主要成果:
- 实现了显著的SNR增强,严重缺陷高达42dB.
- 证明了更好的缺陷对比度和检测可靠性.
- 使用基于SNR的估计模型实现了准确的缺陷大小.
结论:
- 拟议的热图检查技术增强了缺陷检测和尺寸.
- 补偿方法有效地应对不均的热负荷和噪声.
- 从温度热谱直接评估缺陷是可能的,简化了分析.
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