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2020 IEEE Far East NDT New Technology & Application Forum (FENDT)最新文献

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Quantitative study on surface crack of 304 austenitic stainless steel under natural magnetic field 自然磁场作用下304奥氏体不锈钢表面裂纹的定量研究
2020 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2020-11-20 DOI: 10.1109/fendt50467.2020.9337556
Ping Fu, Bo Hu, Jia-Lin Yu, X. Lan
{"title":"Quantitative study on surface crack of 304 austenitic stainless steel under natural magnetic field","authors":"Ping Fu, Bo Hu, Jia-Lin Yu, X. Lan","doi":"10.1109/fendt50467.2020.9337556","DOIUrl":"https://doi.org/10.1109/fendt50467.2020.9337556","url":null,"abstract":"Cracks are common defects in stainless steel which often lead to serious industrial accidents. In this paper, magnetic detection without external excitation was proposed. Quantitative defect identification was performed using multiclass classification support vector machine. The magnetic signals of 304 austenitic stainless steel were collected before and after annealing. The width, amplitude and area of magnetic signals were extracted as the input set of support vector machine model, and the prediction accuracy of cracks were compared and analyzed. The results showed that the prediction accuracy of length, width and depth of cracks are 80.70%, 92.71% and 65.63%, respectively. The width and depth of defects are increased by 5.89% and 33.34% respectively. This research provides a potential possibility for quantitative defect identification for nonferromagnetic materials under the natural magnetic field.","PeriodicalId":302672,"journal":{"name":"2020 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123797489","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 on Linear Frequency Modulation Pulse Compression in Electromagnetic Ultrasonic Thickness Measurement 线性调频脉冲压缩在电磁超声测厚中的应用研究
2020 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2020-11-20 DOI: 10.1109/fendt50467.2020.9337520
Sheng-Bin Wang, Shu-juan Wang, Bao Liang, Chuan-liu Jiang, Chao-Fan Zhao, Wei-Hang Zhou
{"title":"Research on Linear Frequency Modulation Pulse Compression in Electromagnetic Ultrasonic Thickness Measurement","authors":"Sheng-Bin Wang, Shu-juan Wang, Bao Liang, Chuan-liu Jiang, Chao-Fan Zhao, Wei-Hang Zhou","doi":"10.1109/fendt50467.2020.9337520","DOIUrl":"https://doi.org/10.1109/fendt50467.2020.9337520","url":null,"abstract":"The energy conversion efficiency of the electromagnetic ultrasonic transducer (EMAT) is extremely low. To solve this problem, this paper applied linear frequency modulation (LFM) pulse compression technology to electromagnetic ultrasonic thickness measurement to improve the signal-to-noise ratio. The EMAT excited by chirp signal was simulated by finite element analysis, and the echo signal obtained by the simulation was subjected to pulse compression. After adding noise, the result showed that the EMAT signal-to-noise ratio was increased more than 6dB compared with the echo signal excited by Toneburst signal. In addition, this paper also applied spectrum modification method to suppress the sidelobes of the output signal, further improving the signal-to-noise ratio by 1.6dB.","PeriodicalId":302672,"journal":{"name":"2020 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128267204","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
Research on Deicing Method Based on Lamb Wave Excited by Piezoelectric Patch 基于压电贴片激励Lamb波的除冰方法研究
2020 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2020-11-20 DOI: 10.1109/FENDT50467.2020.9337539
Quanpeng Yu, Shi-yuan Zhou, Peng-jiao Yao, Xiao-dan Hu, Ming-Hua Zhao, Chunguang Xu
{"title":"Research on Deicing Method Based on Lamb Wave Excited by Piezoelectric Patch","authors":"Quanpeng Yu, Shi-yuan Zhou, Peng-jiao Yao, Xiao-dan Hu, Ming-Hua Zhao, Chunguang Xu","doi":"10.1109/FENDT50467.2020.9337539","DOIUrl":"https://doi.org/10.1109/FENDT50467.2020.9337539","url":null,"abstract":"The effective removal of aircraft icing is the necessary guarantee for the safe flight of aircraft. The construction of a deicing system with low power consumption, lightweight, and high reliability is the new requirement of deicing technology development. In this paper, a low-power deicing method based on the shear stress generated by Lamb waves excited by the piezoelectric patch is proposed. The ability of Lamb waves with different modes to produce interface shear stress under a given input power is studied. It is found that Lamb waves can produce large shear stress in the (0-0.5) MHz band of A0 mode and (1-1.5) MHz band of S0 mode. At the same time, the influence of piezoelectric patch thickness on the interface input shear stress is analyzed by simulation. It is found that the interface input shear stress decreases monotonically with the increase of piezoelectric patch thickness. Finally, the optimal Lamb wave mode and the size of the piezoelectric patch are determined.","PeriodicalId":302672,"journal":{"name":"2020 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133653440","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
Near-Surface Defects Identification in water immersion ultrasonic testing based on FFT and Phase Spectrum Difference 基于FFT和相谱差的水浸超声检测近表面缺陷识别
2020 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2020-11-20 DOI: 10.1109/fendt50467.2020.9337546
S. Guan, Li Li, Xiao-Kai Wang
{"title":"Near-Surface Defects Identification in water immersion ultrasonic testing based on FFT and Phase Spectrum Difference","authors":"S. Guan, Li Li, Xiao-Kai Wang","doi":"10.1109/fendt50467.2020.9337546","DOIUrl":"https://doi.org/10.1109/fendt50467.2020.9337546","url":null,"abstract":"Ultrasonic pulse-echo testing always exist a near-surface blind zone, because the defect echo overlaps with the interface echo, it is difficult to accurately identify the near-surface defect. This paper presents an investigation with fast Fourier transform (FFT) combined with phase spectrum difference (PSD) for detecting near-surface defects in metal materials. Firstly, the phase spectrum of defect signal and free-defect signal are obtained by FFT, and the PSD between them is calculated. The FFT is utilized again to acquire the main frequency and corresponding period of PSD. Then, the offset time is proposed to represent the location of the near-surface defects. The theoretical correctness of the proposed method is validated by the ultrasonic simulation signals of single defect, multi-defects and noise interference in the near-surface blind zone. Finally, the water immersion ultrasonic testing experiment is carried out to detect the near-surface artificial defects of test specimens from a large ring forging. The experimental result revealed that the calculation of near-surface defects depth by offset time has high accuracy.","PeriodicalId":302672,"journal":{"name":"2020 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124445324","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
Coded excitation with Nonlinear Frequency Modulation Carrier in Ultrasound Imaging System 超声成像系统中非线性调频载波编码激励
2020 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2020-11-20 DOI: 10.1109/fendt50467.2020.9337517
Zeng Fan, Hongying Meng
{"title":"Coded excitation with Nonlinear Frequency Modulation Carrier in Ultrasound Imaging System","authors":"Zeng Fan, Hongying Meng","doi":"10.1109/fendt50467.2020.9337517","DOIUrl":"https://doi.org/10.1109/fendt50467.2020.9337517","url":null,"abstract":"Since signal-to-noise ratio and axial resolution are effective decision parameters in ultrasound imaging and ultrasonic testing system, we combined nonlinear frequency modulation and Barker code sequence to improve these parameters, thereby improving the effect and performance in the ultrasound imaging and ultrasonic testing system. The theoretical study on the signal generation and decoding has been presented and the cyst phantom simulation has been carried out. The theoretical analysis shows that the new code method can improve 8.46 dB in Contrast ratio compared to simple pulse signal. The simulation produced the similar results.","PeriodicalId":302672,"journal":{"name":"2020 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124556072","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
Study on Electrofusion Welding Process Based on Real-time Ultrasonic Phased Array Video Recording 基于超声相控阵实时录像的电熔焊接工艺研究
2020 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2020-11-20 DOI: 10.1109/fendt50467.2020.9337515
Yangji Tao, Weican Guo, Cun-jian Miao, Jian-Feng Shi
{"title":"Study on Electrofusion Welding Process Based on Real-time Ultrasonic Phased Array Video Recording","authors":"Yangji Tao, Weican Guo, Cun-jian Miao, Jian-Feng Shi","doi":"10.1109/fendt50467.2020.9337515","DOIUrl":"https://doi.org/10.1109/fendt50467.2020.9337515","url":null,"abstract":"Welding parameters, i.e. input power and welding time, in the electrofusion welding process are key factors affecting welding quality of polyethylene pipes. The approach of the full-process and real-time video recording for welding process was developed. The cross-section of electrofusion joint was detected by using ultrasonic phased array technology and B-scan imaging technology. Eigen-line at fusion interface was detected, due to the acoustic impedance difference between fusion zone and the solid unfused zone. Further research found that this approach could be used to evaluate the welding parameters by measuring the depth of fusion zone and the moving speed of Eigen-line in recorded videos. Based on the depth decrease of unfused zone, the optimized welding time can be determined.","PeriodicalId":302672,"journal":{"name":"2020 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130836854","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
Singularity Analysis of Scanning Trajectory and Avoidance Method for Ultrasonic Testing Robot 超声检测机器人扫描轨迹奇异性分析及避免方法
2020 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2020-11-20 DOI: 10.1109/fendt50467.2020.9337549
Juan Hao, Wanxin Yang, Zhao Guo, Tongtai Cao, Jin-Hu Chen
{"title":"Singularity Analysis of Scanning Trajectory and Avoidance Method for Ultrasonic Testing Robot","authors":"Juan Hao, Wanxin Yang, Zhao Guo, Tongtai Cao, Jin-Hu Chen","doi":"10.1109/fendt50467.2020.9337549","DOIUrl":"https://doi.org/10.1109/fendt50467.2020.9337549","url":null,"abstract":"The combination of robots and non-destructive testing technology promotes the development of automatic testing systems in high flexibility, high efficiency, and high accuracy. This paper uses the dexterity index to analyze the singular configuration of the robot scanning trajectory and proposes two methods to avoid the singularity. One is to change the position of the workpiece and re-planning the trajectory. The other is to add a redundant degree of freedom so that the robot can select more than one path to move. Ultrasonic scanning experiments show that the singularity analysis of the scanning trajectory can guarantee that the scanning process is stable and the equipment is safe.","PeriodicalId":302672,"journal":{"name":"2020 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128773407","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
The Selection of Optimal Mode Pair of Nonlinear Guided Waves in Waveguide of Arbitrary Cross-section 任意截面波导中非线性导波最优模对的选择
2020 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2020-11-20 DOI: 10.1109/FENDT50467.2020.9337547
Xiaochuan Niu, Li-qiang Zhu, Zu-jun Yu
{"title":"The Selection of Optimal Mode Pair of Nonlinear Guided Waves in Waveguide of Arbitrary Cross-section","authors":"Xiaochuan Niu, Li-qiang Zhu, Zu-jun Yu","doi":"10.1109/FENDT50467.2020.9337547","DOIUrl":"https://doi.org/10.1109/FENDT50467.2020.9337547","url":null,"abstract":"The existing researches have indicated the conditions that mode pair of fundamental mode and second harmonic mode need to satisfy to produce the cumulative second harmonic. However, due to the multimodal characteristics of ultrasonic guided waves, the conditions are very complex. In this article, a numerical simulation method is proposed to select the optimal mode pair that can generate the cumulative second harmonic mode with the largest amplitude in waveguide of arbitrary cross-section. The optimal mode pair is determined by calculating and comparing the amplitude coefficients of different mode pairs based on mode shape analysis. The CHN60 rail is taken as an example for simulation verification, and the optimal mode pair of nonlinear guided waves in rail is selected.","PeriodicalId":302672,"journal":{"name":"2020 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126659225","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 Study on Techniques to Detect Surface Stress Corrosion Cracking in Austenite Stainless Steel 奥氏体不锈钢表面应力腐蚀裂纹检测技术研究
2020 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2020-11-20 DOI: 10.1109/fendt50467.2020.9337555
Yunling Li, Huai-Bei Dai, Cheng-Chong Song, Li-Hong Liang
{"title":"A Study on Techniques to Detect Surface Stress Corrosion Cracking in Austenite Stainless Steel","authors":"Yunling Li, Huai-Bei Dai, Cheng-Chong Song, Li-Hong Liang","doi":"10.1109/fendt50467.2020.9337555","DOIUrl":"https://doi.org/10.1109/fendt50467.2020.9337555","url":null,"abstract":"To find out the effective testing techniques to detect Stress Corrosion Cracking in the in-service Austenite stainless steel pressure vessels and piping, testing experiments of Liquid Penetrant Testing, Eddy Current Array and Digital Radiography were studied to detect Stress Corrosion Cracking in 2 specimens and the effect of the surface curvature of the pipe on Stress Corrosion Cracking detectability was studied by the CIVA simulation. The results show that, Eddy Current Array has a higher ability to detect the surface-breaking and subsurface Stress Corrosion Cracking than PT, Digital Radiography can detect some buried Stress Corrosion Cracking but limited by the crack detection angle and the geometric unsharpness, and they are the good combination for the external testing of the austenite stainless steel pressure vessels and piping.","PeriodicalId":302672,"journal":{"name":"2020 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115211307","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
Method for Measuring the Intensity of Ultrasonic Radiation in Solid Medium 固体介质中超声辐射强度的测量方法
2020 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2020-11-20 DOI: 10.1109/fendt50467.2020.9337553
De-zhi Li, Sheng-Jie Yin, Chunguang Xu, Jianxin Zhang, Yuren Lu
{"title":"Method for Measuring the Intensity of Ultrasonic Radiation in Solid Medium","authors":"De-zhi Li, Sheng-Jie Yin, Chunguang Xu, Jianxin Zhang, Yuren Lu","doi":"10.1109/fendt50467.2020.9337553","DOIUrl":"https://doi.org/10.1109/fendt50467.2020.9337553","url":null,"abstract":"A method based on stratified measurement and inverse fitting is proposed to measure and analyze the intensity of power in solid medium aiming at the problem of power ultrasonic intensity measurement in solid. The thickness of the typical solid medium is determined according to the sound pressure distribution on the acoustic axis of the simulated sound field, and the surface acoustic field is measured separately to obtain the change of the sound intensity in the radial direction. Then the measurements of different thicknesses are fitted based on a fractional linear fit algorithm. Finally, the distribution of the power ultrasonic field in the solid is obtained by using the fitting equation. This paper also compares the experimental measurement results with the COMSOL simulation results. The two have a high degree of similarity in the trend of change, indicating that the measurement scheme is feasible.","PeriodicalId":302672,"journal":{"name":"2020 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130862669","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
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