超声成像自动检测系统开发
|
摘要
采用常规超声检测工件时,检测效率低,无法得到直观的检测结果。为了提高超声检测的检测速度、检测适用范围及灵活性,采用电子扫描、动态闸门、信号去噪及成像算法,结合三轴机械扫描架,研制了超声成像自动检测软硬件系统。采用双晶探头对4 mm厚的碳纤维复合材料试样内分层孔缺陷进行了检测扫查试验,对检测系统的性能进行了初步验证。通过对-6 dB法成像矩阵数据进行双线性插值法的方式,对碳纤维复合材料分层孔缺陷进行定量分析,孔缺陷面积定量误差降低了6%～7%,直径定量误差降低了3%～4%,有效提高了缺陷定量精度。试验结果表明所研制的系统能够实现对试件内缺陷信号特征提取及成像,满足检测的要求。
When routine ultrasound was used to detect the workpiece,the detection efficiency was low and the intuitive detection results cannot be obtained. In order to improve the detection speed of ultrasonic detection,detection range and flexibility,electronic scanning,dynamic gate,signal denoising and imaging algorithm were adopted combined with the three axis mechanical scanning frame,the automatic testing software and hardware system of ultrasonic imaging was developed. The laminated hole defects in carbon fiber composite specimens of 4 mm thick were detected by twin crystal probe,performance of the detection system is preliminarily verified. By bilinear interpolation method of-6 d B imaging data matrix,the carbon fiber composite layered hole defect was quantitative analyzed. The quantitative error of hole defect area was reduced by 6% ～ 7%,and the quantitative error of diameter was reduced by 3% ～ 4%,it can effectively improve the quantitative accuracy of defects. The experimental results show that the developed system can realize the feature extraction and imaging of defect signals in the test piece,and meet the requirements of detection.
When routine ultrasound was used to detect the workpiece,the detection efficiency was low and the intuitive detection results cannot be obtained. In order to improve the detection speed of ultrasonic detection,detection range and flexibility,electronic scanning,dynamic gate,signal denoising and imaging algorithm were adopted combined with the three axis mechanical scanning frame,the automatic testing software and hardware system of ultrasonic imaging was developed. The laminated hole defects in carbon fiber composite specimens of 4 mm thick were detected by twin crystal probe,performance of the detection system is preliminarily verified. By bilinear interpolation method of-6 d B imaging data matrix,the carbon fiber composite layered hole defect was quantitative analyzed. The quantitative error of hole defect area was reduced by 6% ～ 7%,and the quantitative error of diameter was reduced by 3% ～ 4%,it can effectively improve the quantitative accuracy of defects. The experimental results show that the developed system can realize the feature extraction and imaging of defect signals in the test piece,and meet the requirements of detection.
引文
[1]杨青,刘颖韬.航空航天领域中超声波C扫描检测系统的发展与应用[J].无损检测,2012,34(7):53-56.
[2]张玉华,许贵阳,李培,等.钢轨探伤车自主化超声检测系统的关键技术[J].中国铁道科学,2015,36(5):131-136.
[3]顾亚雄,曹亚军,赵自民.基于超声成像技术的套管损伤检测系统设计[J].自动化技术与应用,2014,33(10):67-69.
[4]杨博,范弘.基于虚拟仪器的钢管在线自动超声检测系统[J].无损检测,2014,36(9):81-84.
[5] STEPINSKI T,LINGVALL F. Synthetic aperture focusing techniques for ultrasonic imaging of solid objects[J]. Synthetic Aperture Radar(EUSAR),2010:438-441.
[6] MATZ V,SMID R,STARMAN S,et al. Signal-to-noise ratio enhancement based on wavelet filtering in ultrasonic testing[J]. Ultrasonics,2009,49(8):752-759.
[7] PRAVEEN A,VIJAYAREKHA K,ABRAHAM S T,et al.Signal quality enhancement using higher order wavelets for ultrasonic TOFD signals from austenitic stainless steel welds.[J]. Ultrasonics,2013,53(7):1288.
[8]魏莹莹,安庆龙,蔡晓江,等.碳纤维复合材料超声扫描分层检测及评价方法[J].航空学报,2016,37(11):3512-3519.
[9]周正干,周江华,章宽爽,等.合成孔径聚焦在水浸超声缺陷定量中的应用[J].北京航空航天大学学报,2016,42(10):2017-2023.
[10]孙章庆,孙建国,岳玉波,等.基于快速推进迎风双线性插值法的三维地震波走时计算[J].地球物理学报,2015,58(6):2011-2023.
[2]张玉华,许贵阳,李培,等.钢轨探伤车自主化超声检测系统的关键技术[J].中国铁道科学,2015,36(5):131-136.
[3]顾亚雄,曹亚军,赵自民.基于超声成像技术的套管损伤检测系统设计[J].自动化技术与应用,2014,33(10):67-69.
[4]杨博,范弘.基于虚拟仪器的钢管在线自动超声检测系统[J].无损检测,2014,36(9):81-84.
[5] STEPINSKI T,LINGVALL F. Synthetic aperture focusing techniques for ultrasonic imaging of solid objects[J]. Synthetic Aperture Radar(EUSAR),2010:438-441.
[6] MATZ V,SMID R,STARMAN S,et al. Signal-to-noise ratio enhancement based on wavelet filtering in ultrasonic testing[J]. Ultrasonics,2009,49(8):752-759.
[7] PRAVEEN A,VIJAYAREKHA K,ABRAHAM S T,et al.Signal quality enhancement using higher order wavelets for ultrasonic TOFD signals from austenitic stainless steel welds.[J]. Ultrasonics,2013,53(7):1288.
[8]魏莹莹,安庆龙,蔡晓江,等.碳纤维复合材料超声扫描分层检测及评价方法[J].航空学报,2016,37(11):3512-3519.
[9]周正干,周江华,章宽爽,等.合成孔径聚焦在水浸超声缺陷定量中的应用[J].北京航空航天大学学报,2016,42(10):2017-2023.
[10]孙章庆,孙建国,岳玉波,等.基于快速推进迎风双线性插值法的三维地震波走时计算[J].地球物理学报,2015,58(6):2011-2023.