摘要
锁相红外热像技术由于其实时、快速、无损以及非接触等优点,被逐渐应用于疲劳研究中。基于锁相红外热像理论,用法国Cedip公司开发的锁相红外热像系统对含缺陷的疲劳试件进行了无损检测,并快速测得了其疲劳极限。结果表明,相位图比幅值图能提供更多的缺陷内部信息,恰当选择检测频率是无损检测的关键,缺陷面积越大检测精度越高。随缺陷深度的增加,疲劳试件的疲劳极限降低。
Lock-in infrared thermography method is gradually used in fatigue studies because of its advantages such as real-time,quick-reaction,non-destructive,non-contact and so on.Non-destructive testing is applied to fatigue specimen with defects,and the fatigue limit is detected rapidly based on lock-in infrared thermography.In parallel,the results are analyzed using lock-in infrared thermography system developed by Cedip in French.It shows that more information of internal detects can be found from phase image than from amplitude image.The experimental procedure indicates that a proper testing frequency is the key to the non-destructive testing.The datas reveale that larger area of defect leads to a precise testing result and the fatigue limit of the specimen decreases with the increase of the defect depth.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2010年第10期2776-2781,共6页
Acta Optica Sinica
基金
国家自然科学基金(10702012)
工业装备分析国家重点实验室自主研究课题基金(S08204)
辽宁省博士科研启动基金(20071093)资助课题
关键词
成像系统
无损检测
红外热像法
锁相
缺陷
imaging systems
non-destructive testing(NDT)
infrared thermography
lock-in
defect