项目名称: 背向散射超声动态散斑场统计特性及空间传播规律研究
项目编号: No.11304168
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 郑伟花
作者单位: 南阳师范学院
项目金额: 25万元
中文摘要: 随着无损检测在医学和工业建设中广泛应用,寻求有效可靠的超声检测方法已成为声学学科的重要研究课题。超声散斑干涉法和相关法是在超声检测方面新发展起来的新方法。本课题对界面背向散射超声波在空间产生的动态散斑场进行研究,以期望揭示出超声动态散斑场的统计特性和空间传播规律。本课题将研究不同散射界面和界面不同运动方式下产生的动态散斑场振幅的统计特性,强度的分布特征和相位的分布情况,同时研究在不同传播介质,不同观察距离,超声动态散斑场的振幅、强度、相位在空间的传播规律。并且设计超声动态散斑场实时数据采集系统,拟采用理论分析、数值模拟和实验相结合的方法对背向散射超声动态散斑场的统计特性和空间传播规律进行研究,分析不同散射介质和传播介质、不同超声入射角、不同观察距离对超声动态散斑场的影响,建立超声动态散斑的物理模型,期望为超声散斑干涉法和相关法的发展提供理论基础。
中文关键词: 超声;动态散斑;统计特性;;
英文摘要: Along with the nondestructive testing in medicine and industry widely used, seeking effective and reliable ultrasonic detection method has become an important research topic of acoustic discipline.The ultrasonic speckle testing method is a new method based on the development of ultrasonic testing.The ultrasonic dynamic speckle field back-scattered from interface in space will be research in this subsject, in hopes that reveals the ultrasonic dynamic speckle field statistical property and space propagation rule. The team will study ultrasonic dynamic speckle field amplitude statistical characteristics, intensity distribution and phase distribution in different scattering interface and interface different motion mode, as well as research speckle field amplitude, strength, phase in the space propagation law in different propagation medium, with different viewing distance. The team design the real-time data acquisition system of ultrasonic dynamic speckle field,and will research on statistical characteristics and space propagation law of the ultrasonic dynamic speckle field back-scattered from interface inspace,by the means of the theoretical analysis, numerical simulation and experimental method,and analyze different scattering medium and propagation medium, different ultrasonic incident Angle and different obser
英文关键词: Ultrasound;Dynamic speckle;Statistical property;;