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

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Analytical Solution to the Characteristics of S0-wave Converted to L(0,2)-wave Based on a Plate Array Coupled to a Pipe 基于板阵耦合管道的50波转换为L(0,2)波特性的解析解
2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681984
Feiran Sun, Yulin Ding, Zhenguo Sun, Qiang Chen, R. Murayama
{"title":"Analytical Solution to the Characteristics of S0-wave Converted to L(0,2)-wave Based on a Plate Array Coupled to a Pipe","authors":"Feiran Sun, Yulin Ding, Zhenguo Sun, Qiang Chen, R. Murayama","doi":"10.1109/FENDT.2018.8681984","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681984","url":null,"abstract":"Ultrasonic guided waves have been widely used in the industrial nondestructive testing of pipes and plates, where the pipe-waves and plate-waves show similar behaviors in some certain modes. In this paper, the characteristics of an S0 mode plate-wave converted to an L(0,2) mode pipe-wave was investigated due to their similar dispersion and wave structure properties. The assumption was initially proposed that the L(0,2) mode pipe-wave could be converted from the corresponding S0 mode plate-wave based on a plate wrapped around a pipe. The equivalent model of a plate array coupled to a pipe was then presented in which the analytical solution to the propagation characteristics of the S0-wave was investigated. Based on the dispersion curve, the effects of the material and the thickness ratio were both studied, which indicated that the L(0,2)-wave can be successfully converted when the similar material and the low thickness ratio are selected.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"30 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":"131053014","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
Model Classification of Guided Wave Signal based on the Visibility Graph and SVM 基于可见图和支持向量机的导波信号模型分类
2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681982
Weilei Mu, Zhengxing Zou, Hailiang Sun, Guijie Liu, Guangyin Xia, Shoujun Wang
{"title":"Model Classification of Guided Wave Signal based on the Visibility Graph and SVM","authors":"Weilei Mu, Zhengxing Zou, Hailiang Sun, Guijie Liu, Guangyin Xia, Shoujun Wang","doi":"10.1109/FENDT.2018.8681982","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681982","url":null,"abstract":"Model signals of guided wave contains considerable defect information. Model classification is a critical process for online monitoring. Visibility graph (VG) is proposed to transform the model signal into network graph. The topology characteristics of network graph are taken as the new features, and are put into support vector machine (SVM). Three categories dataset consisting of A0 model signal, S0 model signal and the noise signal are considered in this paper. The optimal VG-SVM model is constructed when 13 degrees of cumulative degree distribution are selected. The classification accuracy of optimal VG-SVM model is 95.9%, which is higher than LDA-SVM, PCA-SVM and SVM with the same defect dataset. The experimental results demonstrate that the visibility graph could extract more model information for SVM classifier.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"33 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":"127948160","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
Development of Portable irradiation embrittlement Detection system for Barkhausen noise RPV Steel 巴克豪森噪声RPV钢便携式辐照脆化检测系统的研制
2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681971
X. Zhong, Wang Hai-tao, Zheng Kai, Qian Wang-jie, Liu Xiang-bing, WU Xing, Zhou Jun, Yi Li
{"title":"Development of Portable irradiation embrittlement Detection system for Barkhausen noise RPV Steel","authors":"X. Zhong, Wang Hai-tao, Zheng Kai, Qian Wang-jie, Liu Xiang-bing, WU Xing, Zhou Jun, Yi Li","doi":"10.1109/FENDT.2018.8681971","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681971","url":null,"abstract":"The development of clean energy nuclear power can make environmental protection and economic growth in a win-win situation. The Reactor Pressure Vessel (RPV) is an important factor restricting the service life of the nuclear power plant. In order to estimate the service life of RPV to guarantee the nuclear safety, this paper introduces the design of portable RPV irradiation embrittlement detection system based on Magetic Barkhausen Noise (MBN). TMS320F28335 is taken as the core part of system hardware. The system includes the excitation power supply, the sensor, the conditioning circuit, the collection and the display circuit, the power supply module. The test of thermal aging and proton irradiation is carried out to verify the reliability of the testing system.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"35 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":"129513832","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
Study the Effect of Acoustic Load on the Performance for Sandwiched Piezoelectric Ultrasonic Transducers 研究了声载荷对夹层压电超声换能器性能的影响
2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681974
Xiaoyuan Wei, Yuan Yang
{"title":"Study the Effect of Acoustic Load on the Performance for Sandwiched Piezoelectric Ultrasonic Transducers","authors":"Xiaoyuan Wei, Yuan Yang","doi":"10.1109/FENDT.2018.8681974","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681974","url":null,"abstract":"Sandwiched piezoelectric ultrasonic transducers (SPUTs) are widely used in ultrasonic detection applications especially in structural health monitoring (SHM). To improve detection efficiency, the selection of excitation frequency for SPUTs is extremely significant. Based on the PSpice lossy model of SPUT, the effect of acoustic load on the electromechanical characteristics of SPUTs was investigated in time and frequency domains in this paper. It is shown that the primary resonance frequencies are shifted and the SPUT generate multiple resonant modes when different length aluminum rods are connected. In addition, the effective electromechanical coupling coefficient and the vibration velocity on the front surface of the aluminum rod are decreased under acoustic load. It can be concluded that the simulated analyzed results are in good agreement with the measured ones.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"19 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":"130998984","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
Defect detection in concrete-covered pipe by using smart magnetostrictive patch transducer and demagnetizing factors 基于智能磁致伸缩贴片换能器和退磁因子的混凝土管道缺陷检测
2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681976
P. Tse, Z. Fang
{"title":"Defect detection in concrete-covered pipe by using smart magnetostrictive patch transducer and demagnetizing factors","authors":"P. Tse, Z. Fang","doi":"10.1109/FENDT.2018.8681976","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681976","url":null,"abstract":"The crack in pipe riser covered by a wall is difficult to test because the concrete causes large attenuation and mode conversion. Both reasons make it difficult to analyze the signal. This work reports the design of an axially magnetized magnetostrictive patch transducer (MPT) for efficient transduction of longitudinal guided wave, which can be used to detect defects in concrete-covered pipe risers. First, the theoretical background about demagnetizing field was introduced. The influence of the demagnetizing factors on the transducer efficient was discussed. Second, there kinds of existed MPTs were compared with the proposed smart MPT. In the comparison experiments of defect detection in concreted-covered pipe risers, the developed smart MPT performed better than those three MPTs. Finally, the smart MPT was applied in a defect detection of concrete-covered pipe riser sample. The experimental results for the smart MPT showed that the smart MPT can potentially be applied in pipe’s defect detection.","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":"128734940","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 the inspection technique and maintenance solution for BOSS welds BOSS焊缝检测技术及维护方案的研究
2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681969
Peng Xia, Cheng Yang, Q. Zeng, Hai Yan
{"title":"Study on the inspection technique and maintenance solution for BOSS welds","authors":"Peng Xia, Cheng Yang, Q. Zeng, Hai Yan","doi":"10.1109/FENDT.2018.8681969","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681969","url":null,"abstract":"The BOSS which is also called the set-on branch connection is a new structure used in nuclear power plant in recently years. The BOSS weld failure may lead to borated water leakage, and it will probably affect the safety of the equipment in the pressurized water reactor nuclear power plants (PWRs). In this study, causes of BOSS weld failures were studied first. Then through the technique features of radiographic inspection, an applicable inspection technique for BOSS welds in PWRs was summarized. Combining the experience feedback of BOSS weld failures at home and abroad, a useful maintenance solution was proposed. In the end, some feasible suggestions for improving the quality of BOSS welds were established from the point of views of design process, welding process and inspection process.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"21 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":"134464286","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
An Experimental Comparison of LED and Eddy Current Pulse-Compression Thermography on an Impact Damage CFRP Benchmark Sample LED和涡流脉冲压缩热成像在CFRP冲击损伤基准样品上的实验比较
2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681968
H. Malekmohammadi, S. Laureti, M. Ricci, Q. Yi, Junzhen Zhu, G. Tian
{"title":"An Experimental Comparison of LED and Eddy Current Pulse-Compression Thermography on an Impact Damage CFRP Benchmark Sample","authors":"H. Malekmohammadi, S. Laureti, M. Ricci, Q. Yi, Junzhen Zhu, G. Tian","doi":"10.1109/FENDT.2018.8681968","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681968","url":null,"abstract":"A comparison of the application of Pulse-Compression to eddy-current and LED thermography is presented. Results achieved on a dedicated sample with an impact damage are reported and discussed. The same pulse compression procedure based on the use of Barker codes has been applied to both techniques and it proved to be work properly in both cases. Two different features have been extracted and imaged from the retrieved time-responses after pulse-compression.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"35 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":"116038765","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: 5
Application of Pulse Compression Technology in Electromagnetic Ultrasonic Thickness Measurement 脉冲压缩技术在电磁超声测厚中的应用
2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681975
Sheng Xia, Zhan-peng Li, Chuan-liu Jiang, Shu-juan Wang, K. Wang
{"title":"Application of Pulse Compression Technology in Electromagnetic Ultrasonic Thickness Measurement","authors":"Sheng Xia, Zhan-peng Li, Chuan-liu Jiang, Shu-juan Wang, K. Wang","doi":"10.1109/FENDT.2018.8681975","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681975","url":null,"abstract":"Electromagnetic ultrasonic thickness measurement has the advantages of no couplant and no contact. But the signals are so weak that they are easily submerged in the noise. So, the pulse compression technology is applied to raise the signal to noise ratio and lift-off distance effectively. The barker sequences are set as transmitting pulse in the measurement system, the received signals are processed with pulse compression in the experiments. By comparing the performances of barker code with single pulse requiring high levels average filtering, the signal to noise ratio is highly improved. The 5 × 13 combined barker sequence performs best among the different combined barker sequences. Its signal to noise ratio reaches 20.11 dB and the maximum lift-off is up to 3.0 mm due to the increasement of the total transmission power.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"48 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":"116923798","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: 8
Implementation and optimization Strategy for SG Primary Side Cross Inspections SG主侧交叉检验的实施与优化策略
2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681978
L. Tian
{"title":"Implementation and optimization Strategy for SG Primary Side Cross Inspections","authors":"L. Tian","doi":"10.1109/FENDT.2018.8681978","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681978","url":null,"abstract":"SG primary side cross inspections (PSCI) are very important in-service inspection items in nuclear island. In most cases for nuclear power station they take the critical paths of the refueling outages. Based on the current implementation strategies of SG PSCI, the potential problems for eddy current inspection on SG tubes, CCTV inspection on SG primary side internal surfacing layer and the transition between the two items are analyzed. Optimization strategies for SG PSCI are proposed, aimed at optimizing the work time and reducing the collective dose, which is in conformity with the principle of Safety First, Quality Foremost.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"7 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":"133664076","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
Lamb Wave Characterization of Crack Depth in Aluminum Plates using Artificial Neural Networks 基于人工神经网络的铝板裂纹深度Lamb波表征
2018 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2018-07-01 DOI: 10.1109/FENDT.2018.8681957
Bo Feng, A. Ribeiro, H. Geirinhas Ramos
{"title":"Lamb Wave Characterization of Crack Depth in Aluminum Plates using Artificial Neural Networks","authors":"Bo Feng, A. Ribeiro, H. Geirinhas Ramos","doi":"10.1109/FENDT.2018.8681957","DOIUrl":"https://doi.org/10.1109/FENDT.2018.8681957","url":null,"abstract":"In this paper, artificial neural network was used for estimating crack depth in aluminum plates. Finite element simulations were performed and the results showed that the transmitted S0 mode wave decreases with the increasing of crack depth. The amplitude and the energy of the S0 wave showed good correlation with crack depth, so they were used as features for neural network training. Finally, experiments were performed with an aluminum plate with three cracks. The features of the experimentally obtained signals were used for testing the performance of the network. The crack depth estimation results showed a maximum relative error of 8%.","PeriodicalId":113185,"journal":{"name":"2018 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"25 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":"133468996","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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