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-  2018 

基于SB-RIO的超声导波检测系统 Development of ultrasonic guided wave testing system based on SB-RIO

Keywords: 超声导波,SB-RIO,时频分析

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Abstract:

针对现有超声导波检测系统通用性差且无法获取原始数据的限制,研制了一套基于SB-RIO的超声导波检测系统.系统由上位机和下位机组成,其中上位机包括存储模块、SB-RIO和用户端,下位机包括电源管理模块、信号发生模块、信号处理模块和主控单元.基于LabVIEW real-time编程,实现了超声导波的激发,以及回波信号的采集、显示和保存.为了分析所研发的检测系统的性能,进行了3组实验:1)在15、20、25dB 3种增益工况下进行缺陷定位分析,实验结果表明:回波最大幅值与增益成正比,缺陷定位误差小于3%;2)与以色列的I-sonic 2009系统进行性能对比实验,结果表明:所研发的检测系统的波速误差大6.11%,定位误差小0.32%;3)裂纹和腐蚀缺陷的特征识别实验,发现裂纹缺陷的能量分散度比腐蚀凹坑缺陷大

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