The Temperature Field of Double-Layer Structure for Laser Scanning Infrared Thermography
-
摘要: 为能准确描述激光扫描红外热波成像中样品表面的温度场特性, 建立了高斯分布线型激光扫描热传导模型, 导出了高斯分布线型激光扫描无限厚样品表面温度场表达式, 得出当激光扫描速度达到合适的范围时, 无限厚样品表面温度场基本符合一维热传导模型的结论; 采用镜像热源法得到了激光扫描有限厚样品表面温度场表达式。根据热波反射与透射定律得出激光扫描双层结构的温度场数学模型, 通过数值计算分析了不同缺陷深度和不同缺陷类型的样品表面温度场, 为激光扫描热波成像技术判断缺陷深度和缺陷类型提供了理论基础。
-
关键词:
- 激光扫描红外热波成像 /
- 无损检测 /
- 温度场 /
- 高斯分布线型激光
Abstract: A laser scanning thermal conduction model was established to accurately describe the characteristics of the sample surface temperature for laser scanning infrared thermography. It is concluded that the surface temperature variation is the same as the 1-D heat transfer model when the laser scanning speed reaches the appropriate range. The surface temperature field expression for limited thickness sample was obtained by using the mirror image source method. According to the law of reflection and transmission, double-layer structure temperature of laser scanning was obtained. Through numerical calculation of sample surface temperature field in different depth with different types of defects, the theoretical foundation to judge the defect depth and defect type was established for the laser scanning infrared thermography. -
-
[1] 罗英,张德银,彭卫东,等. 民航飞机主动热波成像检测技术应用进展［J］. 激光与红外,2011,41(7):718-723. [2] 杨小林,代永朝,李艳红,等.红外热波技术在飞机复合材料损伤检测中的应用［J］.无损检测, 2007,29(4):200-202 [3] 王迅,金万平,张存林,等.红外热波无损检测技术及其进展［J］.无损检测,2004,26(10):497-501. [4] 鲍凯, 王俊涛,吴东流.新兴的无损检测技术［J］.无损检测, 2006,28(8):393-397. [5] 刘波,张存林,冯立春.基于红外热波无损检测系统中闪光灯阵列脉冲热激励装置的研制［J］.中国仪器仪表,2006,12(10):38-43. [6] BEIER K,GEMPERLEIN H.Simulation of infrared detection rang at fog conditions for enhanced vision systems in civil aviation［J］.Aerospace Science and Technology,2004,8(1):63-71. [7] 江海军,陈力,张淑仪.激光扫描红外热波成像在无损检测中的应用［J］.无损检测,2014,36(12):20-22. [8] 王中华,曾智,张存林,等.基于对数二阶微分峰值法的缺陷深度测量研究［J］.无损检测,2013,34(3):21-31. [9] 陈桂才,吴东流,程茶园,等.符合材料缺陷的红外热波无损检测［J］.宇航材料工艺,2004(1):55-58. [10] 李慧娟, 吴东流, 王俊涛,等.铝蒙皮蜂窝夹层结构的各种无损检测方法［J］.无损探伤, 2009, 33(2):9-12. [11] 江海军,陈力,张淑仪.激光扫描红外热波成像的温度场分析［J］.无损检测,2014,36(11):24-27. [12] 熊文平.激光快速扫描原型三维温度场仿真及其热应变计算［D］.长沙: 湖南大学,2004. [13] 霍雁.蜂窝夹层结构复合材料的脉冲红外热波检测技术研究［D］.北京: 北京理工大学, 2011. [14] 李艳红.特种涂层涂敷质量的红外热波无损检测技术研究［D］.北京: 北京理工大学, 2009.
计量
- 文章访问数: 5
- HTML全文浏览量: 2
- PDF下载量: 8
下载:
