相控阵超声检测横向分辨力实验测试及分析
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摘要
使用带有斜楔的60晶片线型阵列换能器,以扇扫成像方式,对孔径为8~30 mm范围内,焦距分别为30 mm、40 mm、60 mm、80 mm时相控阵系统的横向分辨力进行了实验测定。研究发现:焦距一定时,随线阵换能器孔径的增大,系统的横向分辨力提高;孔径一定时,随焦距增加,系统横向分辨力降低;焦距和换能器孔径对相控阵成像分辨力影响显著。实测结果与理论分析以及已有文献的数值模拟结果具有良好的一致性。研究结果对于相控阵超声检测的工程应用具有重要参考价值。
Lateral resolution of phased array is measured experimentally with the array aperture of 8 to 30 mm and focus length of 30 mm,40 mm,60 mm,80 mm,respectively.In the experiments a 60 element linear array transducer with wedge is used and sectorial scanning method is adopted.Experiment study reveals that increasing the aperture will improve the lateral resolution while the focus length is fixed;the lateral resolution will decrease with the increase of focus length while the aperture is fixed.The focus length and aperture have great impact on the resolution.Experiment results show good agreements with theoretical analysis and numerical simulation results reported in literatures.The study results are of great value to the applications of phased array ultrasonic testing.
Lateral resolution of phased array is measured experimentally with the array aperture of 8 to 30 mm and focus length of 30 mm,40 mm,60 mm,80 mm,respectively.In the experiments a 60 element linear array transducer with wedge is used and sectorial scanning method is adopted.Experiment study reveals that increasing the aperture will improve the lateral resolution while the focus length is fixed;the lateral resolution will decrease with the increase of focus length while the aperture is fixed.The focus length and aperture have great impact on the resolution.Experiment results show good agreements with theoretical analysis and numerical simulation results reported in literatures.The study results are of great value to the applications of phased array ultrasonic testing.
引文
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[13]CLAY A C,WOOH S C,AZAR L.Experimental studyof phased array beam steering characteristics[J].Journalof Nondestructive Evaluation,1999,18(2):59-71.
[14]WOOH S C,SHI Y J.A simulation study of the beamsteering characteristics for linear phased arrays[J].Jour-nal of Nondestructive Evaluation,1999,18(2):39-57.
[15]WILL P,KEIZER MN.APAS:An advanced phased-ar-ray simulator[J].IEEE Antennas and Propagation Maga-zine,2010,52(2):40-56.
[16]施克仁,郭寓岷.相控阵超声成像检测[M].北京:高等教育出版社,2010.SHI K R,GUO Y M.Phased array ultrasonic imaging andtesting[M].Beijing:Higher Education Press,2010.
[17]WANG H,FANG D G,CHOW Y L.Grating lobe reduc-tion in a phased array of limited scanning[J].IEEETransactions On Antennas And Propagation,2008,56(6):1581-1586.
[18]LEE J H,CHOI S W.A parametric study of ultrasonicbeam profiles for a linear phased array transducer[J].IEEE transactions on ultrasonics,ferroelectrics,and fre-quency control,2000,47(3):644-650.
[2]陈娟,祁欣,郑新业.超声聚焦和TR测厚技术的研究[J].电子测量技术,2009,32(11):125-128.CHEN J,QI X,ZHENG X Y.Research on the ultrasonicfocusing and TR thickness measurement technology[J].Electronic Measurement Technology,2009,32(11):125-128.
[3]卢超,魏运飞,徐薇.钢轨踏面斜裂纹超声表面波B扫成像检测研究[J].仪器仪表学报,2010,31(10):2272-2278.LU CH,WEI Y F,XU W.Study on B-scan imaging de-tection for rail tread tilted cracks using ultrasonic surfacewave[J].Chinese Journal of Scientific Instrument,2010,31(10):2272-2278.
[4]李衍.相控阵超声检测国际动态[J].无损检测,2009,31(1):56-60.LI Y.Worldwide trend of phased array ultrasonic testing[J].Nondestructive Testing,2009,31(1):56-60.
[5]詹湘琳,陈世利,张宇,等.超声相控阵在管道缺陷检测中的优化设计[J].仪器仪表学报,2006,27(6):1581-1582.ZHAN X L,CHEN SHL,ZHANG Y,et al.Optimum de-sign of ultrasonic phased array in flaw detection of pipe-line[J].Chinese Journal of Scientific Instrument,2006,27(6):1581-1582.
[6]何存富,袁红梅,吴斌.软包装热封缺陷的超声无损检测[J].仪器仪表学报,2009,30(4):750-755.HE C F,YUAN HM,WUB.Defect detection in seal re-gion of flexible packages using ultrasonic non-destructivetesting technique[J].Chinese Journal of Scientific In-strument,2009,30(4):750-755.
[7]徐圆飞,徐春广.基于小球反射法的超声换能器脉冲声场模型研究[J].仪器仪表学报,2010,31(2):253-258.XU Y F,XUCHG.Study on the pulse sound field modelof ultrasonic transducer based on small ball reflectionmethod[J].Chinese Journal of Scientific Instrument,2010,31(2):253-258.
[8]连红运,吴定允,刘新.高频窄脉冲超声聚焦传感器的工艺及应用[J].仪器仪表学报,2008,29(2):444-448.LIAN HY,WU D Y,LIU X.Technology and applicationof high frequency short pulse ultrasonic focused transduc-er[J].Chinese Journal of Scientific Instrument,2008,29(2):444-448.
[9]CAMACHO J,PARRILLA M,FRITSCH C.Grating-lobes reduction by application of phase coherence factors[C].IEEE International Ultrasonic Symposium,Rome,Italy,2009:341-344.
[10]黄云开,郑政,杨柳.基于MATLAB的三维超声成像及图像处理[J].仪器仪表学报,2009,30(4):840-847.HUANG Y K,ZHENG ZH,YANG L.Three dimensionultrasound imaging and image processing based on MAT-LAB[J].Chinese Journal of Scientific Instrument,2009,30(4):840-847.
[11]唐斌,汪学刚,陈客松,等.稀疏阵列空时采样的杂波抑制的仿真研究[J].电子测量与仪器学报,2008,22(6):12-16.TANG B,WANG X G,CHEN K S,et al.Simulation re-search of mitigating clutter for sparse antenna arrays[J].Journal of Electronic Measurement and Instrument,2008,22(6):12-16.
[12]姜弢,林君,陈祖斌,等.可控震源相控地震的相关检测技术[J].仪器仪表学报,2005,26(4):336-339.JIANG T,LIN J,CHEN Z B,et al.The correlation detec-tion method of signals in phased array of vibroseis system[J].Chinese Journal of Scientific Instrument,2005,26(4):336-339.
[13]CLAY A C,WOOH S C,AZAR L.Experimental studyof phased array beam steering characteristics[J].Journalof Nondestructive Evaluation,1999,18(2):59-71.
[14]WOOH S C,SHI Y J.A simulation study of the beamsteering characteristics for linear phased arrays[J].Jour-nal of Nondestructive Evaluation,1999,18(2):39-57.
[15]WILL P,KEIZER MN.APAS:An advanced phased-ar-ray simulator[J].IEEE Antennas and Propagation Maga-zine,2010,52(2):40-56.
[16]施克仁,郭寓岷.相控阵超声成像检测[M].北京:高等教育出版社,2010.SHI K R,GUO Y M.Phased array ultrasonic imaging andtesting[M].Beijing:Higher Education Press,2010.
[17]WANG H,FANG D G,CHOW Y L.Grating lobe reduc-tion in a phased array of limited scanning[J].IEEETransactions On Antennas And Propagation,2008,56(6):1581-1586.
[18]LEE J H,CHOI S W.A parametric study of ultrasonicbeam profiles for a linear phased array transducer[J].IEEE transactions on ultrasonics,ferroelectrics,and fre-quency control,2000,47(3):644-650.
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