光声压电技术对材料热扩散率分布成像研究  

Study on Imaging of Thermal Diffusivity Distribution of Materials by Photoacoustic Piezoelectric Technique

作　　者：赵斌兴[1] 王亚非[1] 高椿明[1] 孙启明[1] 严来军[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054

出　　处：《压电与声光》2015年第1期76-80,共5页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(50506006;61379013);四川省青年基金人才培养计划基金资助项目(2011JQ0025);中央高校基本科研业务费基金资助项目(ZYGX2012Z006;E022050205)

摘　　要：利用光声压电技术研究材料热扩散率分布,开展不均匀材料热扩散率分布成像研究。首先,根据频域光声压电热扩散率检测模型,分析了材料热扩散率成像的基本原理与影响参数;其次,通过采用空间逐点扫描与单点频率扫描相结合的方式,建立了扫描光声压电热扩散率成像系统;最后,对不均匀材料开展热扩散率分布成像测量研究。研究结果表明,基于光声压电检测的热扩散率成像技术可有效测量材料的热扩散率分布。The photoacoustic piezoelectric（PAPE）technique is employed to realize imaging of thermal diffusivity distribution of inhomogeneous materials.Firstly,based on the frequency-domain PAPE model of the thermal diffusivity determination,the principle and the influencing parameters of the thermal diffusivity imaging are analyzed;Secondly,the PAPE thermal diffusivity imaging system has been set up,in which a modality combining the point-bypoint scan and the single-point frequency scan has been adopted;finally,thermal diffusivity imaging study of inhomogeneous materials was carried out.The results show that the PAPE technique can effectively determine the thermal diffusivity distribution of materials.

关 键 词：热扩散率成像 光声压电法 不均匀材料 

分 类 号：TN804[电子电信—信息与通信工程] O436[机械工程—光学工程]