摘要
针对红外热成像无损检测系统存在温度误差较大和精度较差等问题,提出一种基于无损检测仿真模型的检测方法。选取相同实验环境下激励点处和缺陷中心处等多个表面温度值作为参考量,用来对仿真模型进行修改和校正。首先改变激光激励时间来分析激励点两侧区域的温度变化趋势,揭示缺陷对试件温度场的影响规律;然后对比激励点两侧区域的温度值,分析缺陷的温阻效应;最后采用数据拟合的方法得到激励时间与测温点最大温差值的拟合曲线及函数关系,定量分析激励时间与测温点最大温差值的数量关系。结果表明,基于无损检测仿真模型的检测方法对零件缺陷的检测效果显著,可以解决测温误差较大和精度较差的问题,对零件缺陷具有良好的检测能力。
Aiming at the problems of large temperature error and poor accuracy in infrared thermal imaging nondestructive testing system,a detection method based on nondestructive testing simulation model is proposed.Several surface temperatures at the excitation point and defect center in the same experimental environment are selected as reference values to modify and correct the simulation model.First,the temperature variation trend of both sides of the excitation point is analyzed by changing the laser excitation time to reveal the influence of defects on the temperature field of the specimen.Then,the temperature resistance effect of the defect is analyzed by comparing the temperature values of the regions on both sides of the excitation point.Finally,the fitting curve and function relationship between the excitation time and the maximum temperature difference of the temperature measuring point are obtained by using the method of data fitting.The quantitative relationship between the excitation time and the maximum temperature difference of the temperature measuring point is analyzed quantitatively.The results show that the detection method based on the simulation model of nondestructive testing has a remarkable effect on the detection of parts defects,it can solve the problems of large temperature measurement error and poor accuracy,and has a good ability to detect parts defects.
作者
王涛
刘明明
王浩
吴易泽
朱磊
王长宏
谢继昌
Wang Tao;Liu Mingming;Wang Hao;Wu Yize;Zhu Lei;Wang Changhong;Xie Jichang(School of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China;Engineering technology training center of Civil Aviation University of China,Tianjin 300300,China;Universitéde Technologie de Compiègne,Compiègne 60200,France)
出处
《激光与光电子学进展》
CSCD
北大核心
2021年第23期222-230,共9页
Laser & Optoelectronics Progress
基金
天津市教委科研计划(2019KJ119)。
关键词
激光光学
红外热成像
激光
无损检测
仿真模型
激励时间
温阻效应
laser optics
infrared thermal imaging
laser
nondestructive testing
simulation model
heating time
temperature resistance effect
