2018 IEEE Far East NDT New Technology & Application Forum (FENDT)最新文献

Analysis and Optimization Design of Rectangular Coil as Uniform Current Source 矩形线圈作为均匀电流源的分析与优化设计

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681954

Peng Gao, Xuan Wang, Weifei Niu, Yang Yang

引用次数: 0

A method for seeking the optimum probing frequency in vibro-acoustic modulation testing 声振调制试验中最佳探测频率的寻求方法

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681963

B. Liu, Jun Yang, T. Gang

引用次数: 1

Research on Forward Compensation Algorithm of Water-immersed Total Focusing Ultrasound Imaging 水浸全聚焦超声成像前向补偿算法研究

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681961

Yong-Jun. Li, Zefeng Wang, Chaoyong Peng, Jian-qiang Guo

{"title":"Research on Forward Compensation Algorithm of Water-immersed Total Focusing Ultrasound Imaging","authors":"Yong-Jun. Li, Zefeng Wang, Chaoyong Peng, Jian-qiang Guo","doi":"10.1109/FENDT.2018.8681961","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681961","url":null,"abstract":"To overcome the problem of long imaging time caused by the calculation of the refraction point in the double-layer medium ultrasonic imaging, the algorithm in this paper based on the radial calculation of the ultrasonic array element and the radiation arc spline compensation is adopted. And the water-immersed ultrasound total focusing phased-array imaging is discussed. First, according to the half-power beam angle corresponding to the ultrasonic transducer array element, the dividing line of the refraction point is divided, and then Bresenham’s line scanning technology is used to determine all the pixels on the refraction line, and further the delay rule is adopted to determine the pixel point in the transmission process, and finally the reconstructed image is generated. This method not only avoids the large amount of time it takes to iteratively solve the refraction point, but also applies it to the full capture technique and the total focusing imaging, which can save the calculating time of the refraction point to the utmost, thus effectively improving the detection efficiency and imaging quality. Through experimental verification, the efficiency of this method is improved by two orders of magnitude compared to the reverse iteration method in 64-element immersed ultrasound total focusing imaging, and the imaging quality is improved slightly.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125497277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Research on Stress Gradient for HIP in Ultrasonic Nondestructive Testing Technology 超声无损检测技术中HIP应力梯度的研究

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681987

Quan-wen Li, Chunguang Xu, Zhi-xiang Li

引用次数: 0

Numerical Perspective on Static Component Generation from Primary Lamb waves Propagating in a Plate with Quadratic Nonlinearity 二次非线性板中主兰姆波产生静分量的数值研究

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681960

Xiang Wan, Xuhui Zhang, Hongwei Fan, M. Dong, H. Ma

{"title":"Numerical Perspective on Static Component Generation from Primary Lamb waves Propagating in a Plate with Quadratic Nonlinearity","authors":"Xiang Wan, Xuhui Zhang, Hongwei Fan, M. Dong, H. Ma","doi":"10.1109/FENDT.2018.8681960","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681960","url":null,"abstract":"Under the discipline of nonlinear ultrasonics, in addition to second harmonic generation, static component generation is another frequently used nonlinear ultrasonic behavior in non-destructive testing (NDT) and structural health monitoring (SHM) communities. However, most previous studies on static component generation are mainly based on using longitudinal waves. It is desirable to extend static component generation from primary longitudinal waves to primary Lamb waves. The static component generated from longitudinal waves is cumulative. When extending the static component generated from the longitudinal waves to Lamb waves, a major concern is that whether the dispersive nature of Lamb will affect the cumulative of the static component or not. In this paper, cumulative effect of static displacement component from different primary Lamb wave modes is investigated. Our study results show that the static components generated from the primary S0, A0 and S1 modes are cumulative regardless of whether the phase velocity of the primary and secondary waves is matched or not. This observation indicates that the static component overcomes the limitations of the traditional nonlinear Lamb waves satisfying phase velocity matching condition to achieve cumulative second harmonic generation. This nature also enables the primary Lamb waves excited at a low center frequency to generate static component used for inspecting large-scale structures with micro-scale damages.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122584950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation on qualitative detection of defects with multi-mode total focusing method 多模全聚焦法定性检测缺陷的仿真研究

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681953

S. Jin, Chu Wang, Shuailin Liu, Li Lin

引用次数: 4

A New System for Defects Inspection of Boiler Water Wall Tubes Using a Combination of EMAT and MFL EMAT与MFL相结合的锅炉水冷壁管缺陷检测新系统

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681967

Shu-juan Wang, Pu Zhao, Zhengyang Qu, K. Wang

{"title":"A New System for Defects Inspection of Boiler Water Wall Tubes Using a Combination of EMAT and MFL","authors":"Shu-juan Wang, Pu Zhao, Zhengyang Qu, K. Wang","doi":"10.1109/FENDT.2018.8681967","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681967","url":null,"abstract":"As the main part of the boiler, the water wall tube which runs on hazardous environment may lead to serious boiler accidents, causing of the tubes’ failure. For this reason, inspecting the defects on the water wall tube comprehensively is extremely required. However, single traditional NDT inspection method is limited in terms of the ability of identifying different kinds of defects. In order to meet the requirement of full-scale inspection, in this paper, a new system is designed using a combination of the electromagnetic acoustic transducer (EMAT) and the magnetic flux leakage (MFL) technology. In this new system, EMAT takes advantage of the horizontal magnetic field that is used for MFL detection to excite the ultrasound. Under this circumstance, the excitation mechanism of the EMAT is different from the general mechanism that is mainly based on the Lorentz-force. After experiment, the new system can effectively measure the remaining wall thickness and identify different kinds of defects including pinholes and circumferential cracks with the sensor being moved outside the tubes.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115016470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Fast time reversal with multiple signal classfication for ultrasonic array imaging 基于多信号分类的超声阵列成像快速时间反转

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681959

Chengguang Fan, Lei Yang, Yongliang Chen, Yong Zhao

引用次数: 0

Research on Ultrasonic Imaging for Arbitrarily Shaped Interface Based on Virtual Source 基于虚拟源的任意形状界面超声成像研究

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681980

Yong Gan, Guo Chen, Chao Lu, Yao Chen

{"title":"Research on Ultrasonic Imaging for Arbitrarily Shaped Interface Based on Virtual Source","authors":"Yong Gan, Guo Chen, Chao Lu, Yao Chen","doi":"10.1109/FENDT.2018.8681980","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681980","url":null,"abstract":"When the components with arbitrarily shaped are detected by the ultrasonic imaging test, the coupling medium such as immersion or wedge is unavoidable used for ensuring the coupling condition. In this state ultrasonic wave will propagate in the arbitrarily shaped two-media interface between coupling medium and component. For the traditional ultrasonic imaging method which the sound velocity is considered constant, the above condition would cause the wrong position of defects in the image. To overcome the problem, a method combining virtual source (VS) and synthetic aperture focusing technique (SAFT) was applied. Firstly, the sound propagation time of the first interface echo of each elements were measured. Then a series of virtual sources at the two-media interface were created by the time of flight (TOF) of two consecutive elements. Secondly, in virtue of the virtual sources, the two-segment sound propagation path from emitting elements to virtual sources and from here to focus points were respectively calculated. Last each point of the imaging region was focused by the delay and sum process of SAFT. The result showed the defect location of component were displayed accurately in the VS-SAFT image.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129422234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stress-deflection angle measurement of the aircraft wings using a biaxial inclination angle sensor 用双轴倾角传感器测量飞机机翼的应力偏转角

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681983

Peng Tian, Fanxing Li, Gui-gang Yin, Da-kui Wang, Song Hu, Wei Yan

引用次数: 1