基于虚拟时间反转法的便携集成式超声导波检测系统软件开发  

Software Development of Portable and Integrated Ultrasonic Guided Waves Testing System Based on Virtual Time Reversal Method

作　　者：刘增华[1] 董拓灿 张易农 何存富[1] 吴斌[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100124 [2]北京市计量检测科学研究院,北京100029

出　　处：《测控技术》2015年第11期110-113,126,共5页Measurement & Control Technology

基　　金：国家自然科学基金项目(50975006;11272021);北京市教委项目(KM201010005003);北京市属高等学校高层次人才引进与培养计划项目(CIT&TCD201304048)

摘　　要：时间反转法是无损检测领域中十分常用的信号操作方法之一。该方法能够实现信号在缺陷位置处的自适应聚焦,使缺陷波包幅值增强,波形便于识别。以虚拟时间反转代替传统时间反转,在实现传统时间反转功能的前提下,减少检测系统中仪器的使用并降低其操作难度。以LabVIEW为平台编写软件,采用事件驱动的状态机来架构软件,外接硬件设备搭建的基于虚拟时间反转法的便携集成式超声导波检测平台,能够实现软件对于仪器的精确控制,实现信号的激励和接收、时间反转运算、信号重构以及DI值计算。在3 mm厚的铝板上进行了基于时间反转法的缺陷检测实验,验证了本软件的可行性。Time reversal method（TRM） is a frequently-used signal operating method in nondestructive testing field.By using TRM,signals can be self-focused in the location of defect,which makes amplitude improved and waves more easily recognized.Based on this principle,instead of TRM,virtual time reversal method（VTRM） is applied to reduce the use of instruments and its operative difficulty on condition of realizing the functions.Algorithms are programmed by LabVIEW,and event driving state machine is used to erect the software.The whole portable and integrated ultrasonic testing platform is able to precisely control the instrument,realize the functions of signal excitation and reception,time reversal operation,signal reconstruction and damage index（DI）calculation.Experiments are conducted in 3 mm aluminum plates to validate the reliability and usability of the software based on time reversal method.

关 键 词：无损检测 时间反转 LABVIEW 仪器控制 软件开发 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论]