Adaptively Total Focusing Imaging Based on Var-MRLA Sparse Method

doi:10.3901/JME.260270

Abstract

Abstract: To reduce time cost and improve imaging quality for total focusing method(TFM), a sparse method based on variance in minimum redundancy linear array(Var-MRLA) is proposed and applied to ultrasonic imaging and defect characterization. The characteristics of received signals and aperture extension are simultaneously considered by this method during optimizing sparse array, allowing the adaptive adjustment of array arrangement according to defect position while maintaining the same effective aperture as the full array. Two transverse holes with 2 mm diameter, 15 mm center depth and 4 mm spacing in the aluminum alloy test block are detected experimentally with total focusing method(TFM) from different positions using a 32-element and 2.25 MHz phased array probe. The results indicate that the Var-MRLA sparse method shows stable imaging performance and high efficiency. The amplitude difference between the two transverse holes is always less than 0.1dB, and the imaging time is reduced by more than 75.4%. Furthermore, the signal-to-noise ratio(SNR) of TFM images is improved by 8.95 dB through the weighted processing of sparse signals utilizing the sign coherence factor(SCF), significantly enhancing image quality and defect identification capability.

Key words: total focusing method (TFM), sparse array, ultrasonic imaging, minimum redundancy linear array (MRLA), signal-to-noise ratio (SNR)

CLC Number:

TG115
TH142

LI Xiao, LUO Zhongbing, SUN Hao, FENG Weilun, JIN Shijie. Adaptively Total Focusing Imaging Based on Var-MRLA Sparse Method[J]. Journal of Mechanical Engineering, 2026, 62(10): 41-49.

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URL: http://www.cjmenet.com.cn/EN/10.3901/JME.260270

http://www.cjmenet.com.cn/EN/Y2026/V62/I10/41

References

[1] 赵天，李营，张超，等. 高性能航空复合材料结构的关键力学问题研究进展[J]. 航空学报，2022，43(6)：63-105. ZHAO Tian，LI Ying，ZHANG Chao，et al. Fundamental mechanical problems in high-performance aerospace composite structures：State-of-art review[J]. Acta Ceronautica et Astronautica Sinaca，2022，43(6)：63-105.
[2] 黄松岭，孙洪宇，王珅，等. 压水堆核电站无损检测与状态监测研究综述[J]. 机械工程学报，2022，58(4)：1-13. HUANG Songling，SUN Hongyu，WANG Kun，et al. Nondestructive testing and condition monitoring of pressurized water reactor nuclear power plants：A review[J]. Journal of Mechanical Engineering，2022，58(4)：1-13.
[3] 付磊，韩军，龙晋桓. 金属增材制件的超声无损检测与评价研究进展[J]. 应用声学，2023，42(2)：434-442. FU Lei，HAN Jun，LONG Jinhuan. Application of ultrasonic nondestructive testing and evaluation on metal additive manufacture parts[J]. Journal of Applied Acoustics，2023，42(2)：434-442.
[4] 金士杰，刘晨飞，史思琪，等. 基于全模式全聚焦方法的裂纹超声成像定量检测[J]. 仪器仪表学报，2021，42(1)：183-190. JIN Shijie，LIU Chenfei，SHI Siqi，et al. Quantitative crack detection by ultrasonic imaging with the full-mode total focusing method[J]. Chinese Journal of Scientific Instrument，2021，42(1)：183-190.
[5] 周正干，李洋，周文彬. 相控阵超声后处理成像技术研究、应用和发展[J]. 机械工程学报，2016，52(6)：1-11. ZHOU Zhenggan，LI Yang，ZHOU Wenbin. Ultrasonic phased array post-processing imaging techniques：A review[J]. Journal of Mechanical Engineering，2016，52(6)：1-11.
[6] 李文涛，张文宾，王俊，等. 多层介质钛合金梯度材料的阵列超声全聚焦成像方法研究[J]. 机械工程学报，2024，60(14)：69-76. LI Wentao，ZHANG Wenbin，WANG Jun，et al. Research on ultrasonic array total focusing imaging method of titanium alloy gradient material with multi-layer medium[J]. Journal of Mechanical Engineering，2024，60(14)：69-76.
[7] 周正干，彭地，李洋，等. 相控阵超声检测技术中的全聚焦成像算法及其校准研究[J]. 机械工程学报，2015，51(10)：1-7. ZHOU Zhenggan，PENG Di，LI Yang，et al. Research on phased array ultrasonic total focusing method and its calibration[J]. Journal of Mechanical Engineering，2015，51(10)：1-7.
[8] PORTZGEN N，GISOLF D，BLACQUIERE G. Inverse wave field extrapolation：A different NDI approach to imaging defects[J]. IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control，2007，54：118-127.
[9] JIN S J，LIU C F，SHI S Q，et al. Profile reconstruction and quantitative detection of planar defects with composite- mode total focusing method (CTFM)[J]. NDT & E International，2021，123：102518.
[10] HOLMES C，DRINKWATER B W，WILCOX P D. Post-processing of the full matrix of ultrasonic transmit-receive array data for non-destructive evaluation[J]. NDT & E International，2005，38(8)：701-711.
[11] NJIKI M，ELOUARDI A，BOUAZIZ S，et al. A multi-FPGA architecture-based real-time TFM ultrasound imaging[J]. Journal of Real-Time Image Processing，2019，16：505-521.
[12] LAMBERT J. Performance evaluation of total focusing method on GPP and GPU[C]// Proceedings of the 2012 Conference on Design and Architectures for Signal and Image Processing，October 23-25，2012，Karlsruhe，Germany. New York：IEEE，2012：1-8.
[13] SO K H，CHEN J，YIU B Y S，et al. Medical ultrasound imaging：To GPU or not to GPU?[J]. IEEE Micro，2011，31(5)：54-65.
[14] 王秀，程建政，倪园. 高速超声信号采集系统的设计[J]. 无损检测，2009，31(2)：144-146. WANG Xiu，CHENG Jianzheng，NI Yuan. Design of high-speed data acquisition system for ultrasonic signal[J]. Nondestructive Testing，2009，31(2)：144-146.
[15] 谢世杰，王强，许卫荣，等. 基于半稀疏矩阵的聚乙烯管超声阵列全聚焦成像实验分析[J]. 声学技术，2023，42(3)：314-320. XIE Shijie，WANG Qiang，XU Weirong，et al. Experimental analysis by total focus imaging of ultrasonic array of polyethylene pipes based on half sparse matrix[J]. Technical Acoustics，2023，42(3)：314-320.
[16] 胡宏伟，杜剑，李洋，等. 基于稀疏矩阵的两层介质超声相控阵全聚焦成像[J]. 机械工程学报，2017，53(14)：128-135. HU Hongwei，DU Jian，LI Yang，et al. Two-layer medium ultrasonic phased array total focusing method imaging based on sparse matrix[J]. Journal of Mechanical Engineering，2017，53(14)：128-135.
[17] 朱文发，陶佳晨，张辉，等. 基于人工蜂群遗传算法的稀疏全聚集成像方法研究[J]. 声学技术，2023，42(5)：655-660. ZHU Wenfa，TAO Jiachen，ZHANG Hui，et al. Sparse TFM imaging by artificial bee colony-genetic algorithm[J]. Technical Acoustics，2023，42(5)：655-660.
[18] 沈晓炜. 基于粒子群算法的稀疏阵列超声相控阵全聚焦成像[J]. 应用声学，2020，39(3)：354-359. SHEN Xiaowei. Ultrasonic sparse-TFM imaging using particle swarm optimization algorithm[J]. Journal of Applied Acoustics，2020，39(3)：354-359.
[19] HU H W，DU J，XU N，et al. Ultrasonic sparse-TFM imaging for a two-layer medium using genetic algorithm optimization and effective aperture correction[J]. NDT & E International，2017，90：24-32.
[20] 洪振清，张剑云，梁浩，等. 最小冗余MIMO雷达阵列设计[J]. 数据采集与处理，2013，28(4)：471-477. HONG Zhenqing，ZHANG Jianyun，LIANG Hao，et al. Design of minimum redundancy MIMO radar array[J]. Journal of Data Acquisition and Processing，2013，28(4)：471-477.
[21] SHI S Q，LIN L，LUO Z B，et al. Resolution enhancement of ultrasonic imaging at oblique incidence by using WTFM based on FMC-AR[J]. Measurement，2021，183：109798.
[22] JI K，ZHAO P，ZHUO C，et al. A high-SNR ultrasonic imaging method for weakly heterogeneous medium[J]. Mechanical Systems and Signal Processing，2024，211：111249.
[23] 龙盛蓉，陈尧，孔庆茹，等. 基于符号相干因子加权的双层介质频域相干复合平面波成像[J]. 仪器仪表学报，2022，43(3)：32-39. LONG Shengrong，CHEN Yao，KONG Qingru，et al. Fourier-domain coherent plane wave compounding imaging for two-layered medium based on sign coherence factor[J]. Chinese Journal of Scientific Instrument，2022，43(3)：32-39.