发布求助
文献互助 智能选刊 最新文献

2019 Far East NDT New Technology & Application Forum (FENDT)最新文献

筛选
英文 中文
Design of Inspection Robot for Spherical Tank Based on Mecanum Wheel 基于机械轮的球罐检测机器人设计
2019 Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2019-06-01 DOI: 10.1109/FENDT47723.2019.8962531
Jie Li, H. Feng, Chun-lei Tu, Shanshan Jin, Xingsong Wang
{"title":"Design of Inspection Robot for Spherical Tank Based on Mecanum Wheel","authors":"Jie Li, H. Feng, Chun-lei Tu, Shanshan Jin, Xingsong Wang","doi":"10.1109/FENDT47723.2019.8962531","DOIUrl":"https://doi.org/10.1109/FENDT47723.2019.8962531","url":null,"abstract":"Traditional manual weld inspection of large spherical tank has high cost, low efficiency and high degree of danger. It is of great significance to design an automated weld flaw detection system. This paper designs a wheeled wall-climbing robot that can crawl on the outer wall of the spherical tank. The Mecanum wheeled trolley is used as a mobile platform for ultrasonic testing with ultrasonic testing equipment. Firstly, the key structure of the robot is introduced, and the independent suspension structure and spherical adjustment mechanism are designed. The reliability of magnetic adsorption was analyzed by static calculation, and the rationality of the structure was verified. The ultrasonic probe fixture is designed according to the ultrasonic flaw detection process. The defect size calculated according to the flaw detection principle. Through the experiment, the motion effect of the wall-climbing robot on the curved surface is analyzed, and the rationality and application value of the wall-detecting robot flaw detection scheme are verified.","PeriodicalId":232572,"journal":{"name":"2019 Far East NDT New Technology & Application Forum (FENDT)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121092418","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: 7
Development and Application of spherical Ultrasonic Array probe for 3D Imaging 三维成像球形超声阵列探头的研制与应用
2019 Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2019-06-01 DOI: 10.1109/FENDT47723.2019.8962749
Junjie Chang, Hai-ying Zhong
{"title":"Development and Application of spherical Ultrasonic Array probe for 3D Imaging","authors":"Junjie Chang, Hai-ying Zhong","doi":"10.1109/FENDT47723.2019.8962749","DOIUrl":"https://doi.org/10.1109/FENDT47723.2019.8962749","url":null,"abstract":"In order to obtain high-resolution three-dimensional images using photoacoustic tomography, we fabricated a hemispherical array sensor. It is used to detect signals of various shapes such as blood vessels that propagate in different directions, and the piezoelectric transducers are placed in hemispheres as much as possible to obtain high-resolution three-dimensional images. And the sensor can receive the wide ultrasonic wave from low frequency to high frequency to deal with the change of ultrasonic frequency with the observation object. The hemispherical array sensor developed by piezoelectric element is used to image iron wire and blood vessel. The results show that the sensor can obtain high imaging resolution.","PeriodicalId":232572,"journal":{"name":"2019 Far East NDT New Technology & Application Forum (FENDT)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121399912","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 Ultrasonic Lamb Wave defect signal recognition method based on VMD 基于VMD的超声Lamb波缺陷信号识别方法研究
2019 Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2019-06-01 DOI: 10.1109/fendt47723.2019.8962610
Chen-chen Zhang, Song Li, W. Xia, Zhongji Guo, Kuan Xiang
{"title":"Research on Ultrasonic Lamb Wave defect signal recognition method based on VMD","authors":"Chen-chen Zhang, Song Li, W. Xia, Zhongji Guo, Kuan Xiang","doi":"10.1109/fendt47723.2019.8962610","DOIUrl":"https://doi.org/10.1109/fendt47723.2019.8962610","url":null,"abstract":"In order to extract the defect from ultrasonic lamb wave signal accurately, the method based on variational mode decomposition (VMD) is proposed. The effect of decomposition produces different results due to the change of the decomposition layer - K. If the value of K is too large or too small, the intrinsic mode function (IMF) cannot be completely separated, resulting in mode aliasing phenomenon. The false components produced in the decomposition process will cause the summation of energy of the decomposed components to be larger than the original signal. In order to address this problem, the relationship between the mean of instantaneous frequency and the K value is used to determine the specific decomposition layer number of the VMD. The mutual information value of each IMF component and the original signal is calculated, and the IMF whose mutual information is lower than the threshold value will be eliminated to remove the false component. This method can decompose the fault signal well in the practical non-destructive testing and provide reference for the application of VMD in the faulted diagnosis of non-destructive testing.","PeriodicalId":232572,"journal":{"name":"2019 Far East NDT New Technology & Application Forum (FENDT)","volume":"181 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124647404","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 on Characteristics of Magnetoacoustic Emission for Q235 Steel Subject to Fatigue Process Q235钢疲劳过程磁声发射特性研究
2019 Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2019-06-01 DOI: 10.1109/FENDT47723.2019.8962696
Wenjun Zeng, Zhinong Li, Yu-cheng Chen, G. Shen, Yongna Shen
{"title":"Study on Characteristics of Magnetoacoustic Emission for Q235 Steel Subject to Fatigue Process","authors":"Wenjun Zeng, Zhinong Li, Yu-cheng Chen, G. Shen, Yongna Shen","doi":"10.1109/FENDT47723.2019.8962696","DOIUrl":"https://doi.org/10.1109/FENDT47723.2019.8962696","url":null,"abstract":"Fatigue fracture is one of the failure modes in the ferromagnetic metal material. The suddenness of the fracture often causes the catastrophic accident Therefore, in order to prevent the fatigue failure of metal materials, the detection and evaluation of the early fatigue state of metal materials are very important. However, the traditional nondestructive testing (NDT) methods are not suitable for the rapid detection of early fatigue conditions of metal materials. Therefore some advanced NDT methods need to be proposed. Magnetoacoustic emission (MAE) is a great potential NDT method in early fatigue testing of ferromagnetic metal materials, because MAE is sensitive to the microstructure and stress state of materials. Therefore, in this paper, the low cycle fatigue of Q235 steel is analyzed by finite element simulation. The life of Q235 steel is also predicted according to Smith-Watson-Topper(SWT) model. Finally, the MAE characteristics of low cycle fatigue in Q235 steel is given.","PeriodicalId":232572,"journal":{"name":"2019 Far East NDT New Technology & Application Forum (FENDT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128837137","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
Effect of Time Resolution on Measuring Newtonian Fluid Viscosity by the Phase of Reflected Shear Wave 时间分辨率对反射横波相位测量牛顿流体粘度的影响
2019 Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2019-06-01 DOI: 10.1109/FENDT47723.2019.8962619
Runrun Hu, Lianguo Wang, Runyang Mo, Chenghui Wang
{"title":"Effect of Time Resolution on Measuring Newtonian Fluid Viscosity by the Phase of Reflected Shear Wave","authors":"Runrun Hu, Lianguo Wang, Runyang Mo, Chenghui Wang","doi":"10.1109/FENDT47723.2019.8962619","DOIUrl":"https://doi.org/10.1109/FENDT47723.2019.8962619","url":null,"abstract":"Ultrasonic is an important method to study the viscoelastic properties of liquid at high frequency. Relationship between the viscosity and phase change between incident wave and reflected wave from solidfluid interface was obtained by acoustic shear impedance model. High resolution time measurement is the key to determine the phase changes of Newtonian fluid which has decoupled relation between amplitude and phase of the reflection coefficient. Various parameters affecting phase difference including the material properties of the solid, the operating frequency and the resolution were discussed in this paper, then the time scales were analyzed theoretically for Newtonian fluid/Plexiglas combination. The results shown that time error of a few tenths of nanosecond can make large deviation in viscosity for lower viscosity products.","PeriodicalId":232572,"journal":{"name":"2019 Far East NDT New Technology & Application Forum (FENDT)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132325201","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 Excitation Layout of Ring Flexible Eddy Current Array Sensor 环形柔性涡流阵列传感器励磁布局研究
2019 Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2019-06-01 DOI: 10.1109/FENDT47723.2019.8962567
Xianghong Fan, Jinqiang Du, Yuting He, Yujian Song
{"title":"Research on Excitation Layout of Ring Flexible Eddy Current Array Sensor","authors":"Xianghong Fan, Jinqiang Du, Yuting He, Yujian Song","doi":"10.1109/FENDT47723.2019.8962567","DOIUrl":"https://doi.org/10.1109/FENDT47723.2019.8962567","url":null,"abstract":"Ring flexible eddy current array sensor is a kind of sensor used for crack monitoring at bolt hole edge, and the layout of the excitation coil has a certain influence on the sensitivity of the crack detection of the sensor. In this paper, the effects of two different layout modes, co-directional excitation and reverse excitation on the sensitivity of crack monitoring are studied. The simulation model of the sensor under the two different layout modes of the co-directional excitation and reverse excitation was established by the COMSOL software. The sensitivity of the crack detection of the sensor under two layout modes was analyzed, and then the sensors of two layout modes were manufactured. The correctness of simulation results was studied through experiment. The results show that the crack monitoring sensitivity of the co-directional excitation layout is significantly higher than that of the reverse excitation layout. In the simulation results, the lowest sensitivity under the codirectional excitation layout is about 12 times of the highest sensitivity under the reverse excitation layout. In the experiment results, the lowest sensitivity under the co-excitation layout is about 3.5 times of the highest sensitivity under the reverse excitation layout. The research results provide an important way to improve the sensitivity of the sensor for crack monitoring.","PeriodicalId":232572,"journal":{"name":"2019 Far East NDT New Technology & Application Forum (FENDT)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121846311","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
Visual Detection of AM Surface Defects Based on Laser Ultrasound Technology 基于激光超声技术的增材制造表面缺陷视觉检测
2019 Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2019-06-01 DOI: 10.1109/FENDT47723.2019.8962808
Yi Jiang, Haitao Wang, G. Tian, Shuai Chen, Luyang Zhang
{"title":"Visual Detection of AM Surface Defects Based on Laser Ultrasound Technology","authors":"Yi Jiang, Haitao Wang, G. Tian, Shuai Chen, Luyang Zhang","doi":"10.1109/FENDT47723.2019.8962808","DOIUrl":"https://doi.org/10.1109/FENDT47723.2019.8962808","url":null,"abstract":"Selective Laser Melting (SLM) process is a kind of Additive Manufacturing (AM) method, which can process parts with arbitrary complex geometry. However, macro-defects will destroy the mechanical properties of metal materials manufactured by SLM. Laser ultrasound can excite broadband surface waves and realize non-contact nondestructive testing of surface defects. In this paper, 316L stainless steel samples are prepared by SLM process are used for laser ultrasonic detection. According to the diffraction phenomenon of surface wave at the defect, a laser ultrasonic B-scan detection platform is built. The B-scan images of different length defects on the sample surface are obtained, and the quantitative detection of surface defects is realized quickly. In order to further improve the signal-to-noise ratio and the accuracy of imaging detection, EEMD (Ensemble Empirical Mode Decomposition) denoising is applied to the collected ultrasonic signal, which improves the accuracy of imaging, makes the signal more stable and realizes the visual detection of surface length defects clearly and intuitively.","PeriodicalId":232572,"journal":{"name":"2019 Far East NDT New Technology & Application Forum (FENDT)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131671009","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 eddy current signal processing algorithms for oxide layer measurement of fuel rods 涡流信号处理算法在燃料棒氧化层测量中的研究
2019 Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2019-06-01 DOI: 10.1109/FENDT47723.2019.8962537
Xi Cheng
{"title":"Study on eddy current signal processing algorithms for oxide layer measurement of fuel rods","authors":"Xi Cheng","doi":"10.1109/FENDT47723.2019.8962537","DOIUrl":"https://doi.org/10.1109/FENDT47723.2019.8962537","url":null,"abstract":"Eddy current testing has been widely used in oxide layer measurement of fuel rods. However, the measured signal will be interfered by multiple factors due to the limitation of eddy current techniques. The emphasis of this paper is to eliminate these interference signals. A variety of signal processing algorithms are presented in this paper, with linear fitting algorithm for correcting the signal drift, with grid filtering algorithm and amplitude-limiting filtering algorithm for eliminating the grid signals and other spike signals, with Savitzky-Golay filtering algorithm for smoothing the signal. All the processing algorithms were simulated in MATLAB with a view to demonstrate the feasibility. The simulation results indicate that these algorithms are effective and practical.","PeriodicalId":232572,"journal":{"name":"2019 Far East NDT New Technology & Application Forum (FENDT)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130424538","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
FENDT 2019 Table of Contents FENDT 2019目录
2019 Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2019-06-01 DOI: 10.1109/fendt47723.2019.8962658
{"title":"FENDT 2019 Table of Contents","authors":"","doi":"10.1109/fendt47723.2019.8962658","DOIUrl":"https://doi.org/10.1109/fendt47723.2019.8962658","url":null,"abstract":"","PeriodicalId":232572,"journal":{"name":"2019 Far East NDT New Technology & Application Forum (FENDT)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128605068","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
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书