2018 IEEE Far East NDT New Technology & Application Forum (FENDT)最新文献_第4页

Research on Improving Detection of Longitudinal Multiple Defects by Dual-layer Virtual Source Imaging 双层虚拟源成像改进纵向多缺陷检测的研究

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681949

Yu Zhang, Xiaorong Gao, Menglin Zhao, Jianping Peng

引用次数: 0

Wayside Acoustic Diagnosis of Axle Box Bearing Based on Fault Feature Extraction Algorithm 基于故障特征提取算法的轴箱轴承路旁声学诊断

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681964

Chaoyong Peng, Ai Wang, Jianping Peng, Xiaorong Gao

引用次数: 1

Induction Thermography for Rail Nondestructive Testing under Speed Effect 速度效应下钢轨无损检测的感应热成像技术

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681985

Yingchun Wu, B. Gao, Jian Zhao, Zewei Liu, Qin Luo, Yongsheng Shi, Longhui Xiong, G. Tian

引用次数: 2

Motion point calculation method for robortic Ultrasonic Nondestructive Testing 机器人超声无损检测的运动点计算方法

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681988

Yi-xin Hu, Juan Hao, Wanxin Yang, Canzhi Guo, Peng Jiang

引用次数: 2

Effect of Temperature on Solid Ultrasonic Propagation Using Finite Element Method and Experiments 温度对固体超声传播影响的有限元分析及实验研究

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681981

B. Hu, Yuhong Zhu, Chao Shi

{"title":"Effect of Temperature on Solid Ultrasonic Propagation Using Finite Element Method and Experiments","authors":"B. Hu, Yuhong Zhu, Chao Shi","doi":"10.1109/FENDT.2018.8681981","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681981","url":null,"abstract":"Time of flight (TOF) is considered to be a sign of solid ultrasonic propagation. The more precise measurement of TOF is the better propagation of ultrasonic in solid we can get. Uncertainties associated with coupling fluids or positional offsets can be eliminated by permanently installed ultrasonic probes. However, the variations caused by temperature need to be considered during measurement of TOF, which makes it potentially possible to monitor the onset of material degradation such as stress modification. In this paper, firstly, the finite element models of ultrasonic propagation in aluminum and steel were respectively established under temperatures from 25°C to 200°C. An error of ultrasonic flight-time due to the change of the ultrasonic path caused by solid thermal expansion was corrected, which was implemented and its performance was compared with simulated and experimental measurements. The results show that the modified velocity equation can effectively reflect the effluence of temperature on ultrasonic flight-time and ultrasonic velocity up to 200°C. The TOF measurements maximum relative errors in aluminum and steel were respectively decreased to 0.4395% and 0.5204%.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"2016 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":"134176959","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: 2

Non-contact ultrasonic detection of rail surface defects in different depths 钢轨表面不同深度缺陷的非接触式超声检测

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681948

Yi Jiang, Haitao Wang, G. Tian, Shuai Chen, Jiyuan Zhao, Qiang Liu, P. Hu

引用次数: 4

Simulation of Modified Absolute Arrival Time Technique for Measuring Surface Breaking Cracks 修正绝对到达时间法测量表面断裂裂纹的模拟

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681956

Xueping Jiang, J. Jia, X. Mao, Q. Han

{"title":"Simulation of Modified Absolute Arrival Time Technique for Measuring Surface Breaking Cracks","authors":"Xueping Jiang, J. Jia, X. Mao, Q. Han","doi":"10.1109/FENDT.2018.8681956","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681956","url":null,"abstract":"Surface breaking cracks pose great risk to the security of steel structure equipment. It is very important to estimate the height and the orientation of surface breaking cracks accurately for the residual life evaluation of equipment. In this paper, a modified phased array ultrasonic absolute arrival time technique (AATT) for this purpose was proposed. It utilizes the absolute position of the tip diffraction echo and the corner reflection echo in a ultrasonic phased array S-scan image to estimate the crack height and the crack inclination angle. The height and the orientation of the surface breaking cracks was deduced with ray acoustic approximation. Both pencil approximation and Kirchhoff approximation were used to simulate the phased array ultrasonic S-scan image of the surface breaking cracks. The echo arrival time extracted from the S-scan image was used to calculate the height and the orientation of surface breaking cracks with AATT technique. The calculated result agree with the size of pre-set cracks in simulation. Proved that the AATT technique can be applied to measure the size of surface breaking cracks, especially in the testing from single side.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"4 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":"114225403","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

Research of PAUT on butt weld of EBW of SS for CFETR vacuum vessel CFETR真空容器不锈钢EBW对接焊缝的PAUT研究

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681950

Yunpeng Fu, Jiefeng Wu, Zhihong Liu, Rui Wang, Beiyan Jiang

引用次数: 0

Initial Architecture Design of Ultrasound Synthetic Aperture Imaging Based on FPGA 基于FPGA的超声合成孔径成像初始架构设计

2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681979

Haicheng Li, Lin Luo, Xiaorong Gao, Jin-long Li

{"title":"Initial Architecture Design of Ultrasound Synthetic Aperture Imaging Based on FPGA","authors":"Haicheng Li, Lin Luo, Xiaorong Gao, Jin-long Li","doi":"10.1109/FENDT.2018.8681979","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681979","url":null,"abstract":"Ultrasound synthetic aperture imaging, in the A-SCAN data processing, consumes a lot of resources and takes a long time. It is difficult to achieve real-time imaging requirements. Field programmable gate arrays (FPGAs) show advantages such as fast processing speed and strong parallelism for the ultrasonic synthetic aperture imaging platform. It provides a viable solution for real-time imaging. In this article, a new ultrasound synthetic aperture imaging structure is introduced, which reduces the resource consumption and improves the imaging efficiency. In this structure, the ultrasound imaging initialization structure is configured, and the index value is configured in the RAM using a memory initialization file, which reduces the square, extraction of a root and other operations in the hardware structure, and reduces the delay operation in the hardware structure. The symmetric relation exists between the index values of symmetric elements, the index values are reused to reduce the memory requirement. Perform functional descriptions using hardware description languages and perform performance tests on Altera Stratix IV FPGAs. According to 32-channel synthetic aperture imaging experiment, the use of index values for beamformer design improves the imaging efficiency and reduces the consumption of hardware resources under the premise of ensuring the ultrasound image and contrast.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"5 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":"133167265","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: 1