摘要
本文介绍在光热红外检测的基础上发展的超声红外热像技术。该技术利用超声脉冲作为激发源,当超声脉冲在试样上传播的过程中遇到裂纹等缺陷时,缺陷引起超声附加衰减而局部升温。利用红外照相机获取试样表面的温度分布,可显示裂纹等缺陷。超声红外热像技术发挥了超声和红外技术的优点,可实时地检测裂纹等缺陷,在无损评价和检测中有广泛应用。
An ultrasonic infrared thermography has been developed based on photother mal infrared detection, in which a short pulsed ultrasound is used as excitation source and an infrared (IR) camera is used to detect the temperature distribution of the sample. As the ultrasonic pulse is absorbed by cracks or other defects the local temperature increases additionally, then the IR camera can display the cracks or defects in real-time. The new technique has the advantages of ultrasonic and IR camera imagings, and has been widely applied in NDE and NDT.
出处
《应用声学》
CSCD
北大核心
2004年第5期1-6,共6页
Journal of Applied Acoustics
基金
国家自然科学委员会资助(10174038)
