In order to explore the influence mechanism of receiving aperture on imaging and testing of synthetic aperture array for ultrasonic guided waves, the receiving matrix (RM) is proposed to discuss imaging theory of synthetic aperture array for ultrasonic guided waves. Taking the line synthetic aperture array of ultrasound SH (Shear horizontal) guided waves in plate as an object, the receiving aperture is discussed by using the receiving amplitude matrix (RAM) and the receiving flight-time matrix (RFTM), the conic characteristic of line array signals and the synthetic aperture imaging algorithm are analyzed, from which the influence mechanism of the full-rank receiving aperture (FRRA), the half-rank receiving aperture (HRRA) and the unit-rank receiving aperture (URRA) on imaging and testing of synthetic aperture array are emphasized especially. The research result shows that the RAM and the RFTM have the same rank, which rank is not only proportional to the number of receiving array elements, but also determines the image Signal-to-Noise ratio (SNR), and image SNR may be monotonically increasing with increasing of RM rank. However, the image SNR of HRRA is close to that of FRRA, the image SNR of URRA is the smallest and which image background noise is the strongest. The imaging experiment verify the validity of the theory analyzing proposed and indicate that the rank of RM is a key influencing factor on imaging and testing of synthetic aperture array, and the RM is a powerful tool for analyzing the influence mechanism of receiving aperture on imaging and testing, which would provides important foundation for further research and application of imaging and testing of irregular array for ultrasonic guided wave.
ZHU Xinjie
,
DENG Mingxi
,
DU Dong
,
HAN Zandong
. Influence of Receiving Aperture on Imaging and Testing of Synthetic Aperture Array for Ultrasonic Guided Waves[J]. Journal of Mechanical Engineering, 2018
, 54(12)
: 133
-140
.
DOI: 10.3901/JME.2018.12.133
[1] 郑阳, 何存富, 吴斌, 等. 采用超声导波阵列技术研究板类结构大面积检测[J]. 声学学报, 2013,38(1):71-79. ZHENG Yang, HE Cunfu, WU Bing, et al. Guided wave arrays for large plate structures inspection[J]. Chinese Journal of Acoustics,2013,38(1):71-79.
[2] 李遥, 吴文焘, 李平, 等. 超声虚源成像中自适应双向空间逐点聚焦方法[J]. 声学学报, 2016, 41(13):287-295. LI Yao, WU Wentao, LI Ping, et al. Adaptive bi-directional point-wise focusing method in ultrasonic imaging based on virtual source[J]. Chinese Journal of Acoustics,2016,41(13):287-295.
[3] 李衍. SH波斜探头的特性及其应用[J]. 无损检测,2004,26(12):622-624. LI Yan. Performance and and application of SH wave angle transducer[J]. Nondestructive Testing,2004,26(12):622-624.
[4] 彭虎. 超声成像算法导论[M]. 合肥:中国科学技术大学出版社,2008. PENG Hu. Introduction to ultrasonic imaging algorithms[M]. Hefei:University of Science and Technology of China Press, 2008.
[5] 朱新杰,韩赞东,都东,等. 基于合成孔径聚焦的超声SH导波成像检测[J].清华大学学报.2011,51(5):687-692. ZHU Xinjie, HAN Zandong, DU Dong, et al. Imaging and inspection of ultrasonic SH-guided wave by synthetic aperture focusing[J]. Journal of Tsinghua University, 2011,51(5):687-692.
[6] ZHU Xinjie, HAN Zandong, DU Dong, et al. Imaging and testing of ultrasonic SH guided waves in plate with lap welding structure[J]. Advanced Materials Research,2011,301-303:603-609.
[7] 朱新杰,韩赞东,都东,等. 边界散射对超声水平剪切导波成像检测的影响[J]. 机械工程学报, 2011,47(16):14-19. ZHU Xinjie, HAN Zandong, DU Dong, et al. SH-guided wave with boundary scattering[J]. Chinese Journal of Mechanical Engineering, 2011,47(16):14-19.
[8] VELICHKO A, WILCOX P D. Guided wave arrays for high resolution inspection[J]. Journal of the Acoustical Society of America, 2008, 123(1):186-196.
[9] RAJAGOPALA J, BALASUBRAMANIAM K, KRISHNAMURTHY C V. A phase reconstruction algorithm for Lamb wave based structural health monitoring of anisotropic multilayered composite plates[J]. Journal of the Acoustical Society of America, 2006, 119(2):872-878.
[10] KIM D, EOM H. Ultrasonic NDE discrimination with thegradient descental gorithm and SAFT image processing[J]. NDT&E International, 2009, 42:250-259.
[11] YU L, SANTONI G B, GIURGIUTIU V. Shear lag solution for tuning ultrasonic piezoelectric wafer active sensors with applications to Lamb wave array imaging[J]. International Journal of Engineering Science, 2010, 48(10):848-861.
[12] ZHANG J, DRINKWATER B W. Defect detection using ultrasonic arrays:The multi-mode total focusing method[J]. NDT & E International, 2010, 43:123-133.
[13] 朱新杰, 韩赞东, 都东, 等. 基于椭圆簇轨迹特征的板中超声导波弧线类阵列成像研究[J]. 机械工程学报, 2012, 48(22):14-20. ZHU Xinjie, HAN Zandong, DU Dong, et al. Imaging of ultrasonic guided waves in plate based on characteristic of elliptical cluster tracks for line-arc kind of array[J]. Chinese Journal Of Mechanical Engineering, 2012, 48(22):14-20.
[14] LIU Zenghua, SUN Kunming, SONG Guorong, et al. Damage localization in aluminum plate with compact rectangular phased piezoelectric transducer array[J]. Mechanical Systems and Signal Processing, 2016, 70-71:625-636.
[15] RAJAGOPALAN J, BALASUBRAMANIAM K, KRISHNAMURTHY C V. A phase reconstruction algorithm for Lamb wave based structural health monitoring of anisotropic multilayered composite plates[J]. Journal of the Acoustical Society of America, 2006, 119(2):872-878.
[16] VELICHKO A, WILCOX P D. Guided wave arrays for high resolution inspection[J]. Journal of the Acoustical Society of America, 2008, 123(1):186-196.
[17] KWON H S, KIM J Y. An analytical filter design method for guided wave phased arrays[J]. Mechanical Systems and Signal Processing, 2016, 81:433-446.
[18] MOLL J, SCHULTE R T, HARTMANN B, et al. Multi-site damage localization in anisotropic plate-like structures using an active guided wave structural health monitoring system[J]. Smart Materials and Structures, 2010, 19(4):45022-45037.
[19] YU L, SANTONI G B, GIURGIUTIU V. Shear lag solution for tuning ultrasonic piezoelectric wafer active sensors with applications to Lamb wave array imaging[J]. International Journal of Engineering Science, 2010, 48(10):848-861.
[20] LI Weibin, CHOB Y. Quantification and imaging of corrosion wall thinning using shear horizontal guided waves generated by magnetostrictive sensors[J]. Sensors and Actuators A:Physics, 2015, 232(6):251-258.
[21] 朱新杰, 陈以方, 韩赞东, 等. 一种用于焊接结构超声成像检测的SH导波换能器[J]. 焊接学报, 2013, 34(2):17-21. ZHU Xinjie, CHEN Yifang, HAN Zandong, et al. An ultrasonic SH-guided-wave transducer for imaging and testing of plate with welding structure[J]. Transactions of the China Welding Institution, 2013, 34(2):17-21.
