作者：王聪聪1, 李咸君1, 吴中权1, 董德秀2, 常俊杰1,3
作者单位：1. 南昌航空大学无损检测技术教育部重点实验室, 江西 南昌 330063;
2. 中国航发沈阳黎明航空发动机有限责任公司, 辽宁 沈阳 110043;
3. 日本探头株式会社, 日本 横滨 232-0033
关键词：超声成像;逆时偏移;底面识别;定量分析;底面开口裂纹
摘要：
传统的超声成像方法只能使用一次反射波对缺陷的上端进行成像，而基于逆时偏移的超声成像方法可使用多次反射波对缺陷进行完整的成像。该项研究将一种基于逆时偏移的超声成像方法用于对底面开口裂纹的高精度成像和定量分析。在数值仿真方面，对底面识别的必要性和高成像精度进行说明。在实验方面，对具有多个底面开口裂纹的铝块进行底面识别，进而对底面开口裂纹进行完整成像。综合考虑底面识别前后的逆时偏移成像结果，可对底面开口裂纹的长度和宽度进行直观的定量分析。最后，针对逆时偏移成像在超声无损检测方面的应用，给出对缺陷进行完整成像及定量分析的3个关键的步骤。
high-precision ultrasonic imaging and quantitative analysis of bottom opening cracks based on reverse time migration
wang congcong1, li xianjun1, wu zhongquan1, dong dexiu2, chang junjie1,3
1. key laboratory of nondestructive testing technology, ministry of education, nanchang hangkong university, nanchang 330063, china;
2. china aviation development shenyang liming aviation engine co., ltd., shenyang 110043, china;
3. japan probe co., ltd., yokohama 232-0033, japan
abstract: the traditional ultrasonic imaging method can only use one reflected wave to image the upper end of the defect, while the ultrasonic imaging method based on reverse time migration can use multiple reflected waves to image the defect completely. in this study, a ultrasonic imaging method based on reverse time migration is used for high-precision imaging and quantitative analysis of bottom opening cracks. in terms of numerical simulation, the necessity of bottom identification and high-precision imaging are explained. in terms of experiments, the bottom identification of an aluminum block with multiple bottom opening cracks are performed, and then the bottom opening cracks are completely imaged. considering the reverse time migration imaging results before and after identification of the bottom surface, the length and width of the bottom opening crack can be quantitatively analyzed intuitively. finally, for the application of reverse time migration imaging in ultrasonic non-destructive testing, three key steps for complete imaging and quantitative analysis of defects are given.
keywords: ultrasound imaging;reverse time migration;bottom identification;quantitative analysis;bottom opening cracks
2023, 49(6):42-48 收稿日期: 2022-03-30;收到修改稿日期: 2022-04-29
基金项目: 国家自然科学基金（11464030）
作者简介: 王聪聪(1998-),男,河南周口市人,硕士研究生,专业方向为超声无损检测技术
参考文献
[1] lim h j, sohn h. fatigue crack detection using structural nonlinearity reflected on linear ultrasonic features[j]. journal of applied physics, 2015, 118(24): 244902
[2] wang r, wu q, yu f m, et al. nonlinear ultrasonic detection for evaluating fatigue crack in metal plate[j]. structural health monitoring, 2019, 18(3): 869-881
[3] 张海伟, 高怡斐, 任欣, 等. 基于压缩预制裂纹方法的钛合金裂纹扩展门槛值测试[j]. 中国测试, 2021, 47(6): 27-32
[4] drinkwater b w, wilcox p d. ultrasonic arrays for non-destructive evaluation: a review[j]. ndt & e international, 2006, 39(7): 525-541
[5] 潘峥, 张邦杰, 汪洪量, 等. 超声相控阵全聚焦成像技术倾斜裂纹定量模拟[j]. 中国测试, 2020, 46(4): 36-41
[6] leuschen c j, plumb r g. a matched-filter-based reverse-time migration algorithm for ground-penetrating radar data[j]. ieee transactions on geoscience and remote sensing, 2001, 39(5): 929-936
[7] zhu j m, lines l r. comparison of kirchhoff and reverse-time migration methods with applications to prestack depth imaging of complex structures[j]. geophysics, 1998, 63(4): 1166-1176
[8] müller s, niederleithinger e, bohlen t. reverse time migration: a seismic imaging technique applied to synthetic ultrasonic data[j]. international journal of geophysics, 2012, 2012(2): 128465
[9] beniwal s, ganguli a. reverse time migration based ultrasonic imaging of rebars embedded in concrete[c]//2015 ieee international ultrasonics symposium (ius). ieee, 2015: 1-4.
[10] qi y, chen z j, liu h, et al. ultrasonic inspection of prefabricated constructions using reverse time migration imaging method[c]//2019 ieee international conference on signal, information and data processing (icsidp). ieee, 2019: 1-4.
[11] rao j, saini a, yang j, et al. ultrasonic imaging of irregularly shaped notches based on elastic reverse time migration[j]. ndt & e international, 2019, 107: 102135
[12] chang j j, wang c c, tang y, et al. numerical investigations of ultrasonic reverse time migration for complex cracks near the surface[j]. ieee access, 2022, 10: 5559-5567
[13] claerbout j f, doherty s m. downward continuation of moveout-corrected seismograms[j]. geophysics, 1972, 37(5): 741-768
[14] youn o k, zhou h. depth imaging with multiples[j]. geophysics, 2001, 66(1): 246-255
[15] drinkwater b w, wilcox p d. ultrasonic arrays for non-destructive evaluation: a review[j]. ndt & e international, 2006, 39(7): 525-541
