2021 IEEE Far East NDT New Technology & Application Forum (FENDT)最新文献_第3页

Magnetic Flux Leakage Inversion Based on Antlion Algorithm 基于Antlion算法的漏磁反演

2021 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2021-12-14 DOI: 10.1109/FENDT54151.2021.9749664

Fu-xing Huang, W. Han, Yi Qin

引用次数: 0

Development of High Temperature Rayleigh Wave Electromagnetic Acoustic Transducer with Double Coil Structure 双线圈结构高温瑞利波电磁声换能器的研制

2021 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2021-12-14 DOI: 10.1109/FENDT54151.2021.9749642

Yu-Hang Ge, Shu-juan Wang, Bao Liang, Xi Li

引用次数: 1

Pulse-modulation Eddy Current Imaging and Evaluation of Hidden Flaws in Layered Conductors 脉冲调制涡流成像及层状导体中隐藏缺陷的评价

2021 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2021-12-14 DOI: 10.1109/FENDT54151.2021.9749679

Zhengshuai Liu, Yong Li, Shuting Ren, Yanzhao Ren, Bei Yan, Zhenmao Chen

{"title":"Pulse-modulation Eddy Current Imaging and Evaluation of Hidden Flaws in Layered Conductors","authors":"Zhengshuai Liu, Yong Li, Shuting Ren, Yanzhao Ren, Bei Yan, Zhenmao Chen","doi":"10.1109/FENDT54151.2021.9749679","DOIUrl":"https://doi.org/10.1109/FENDT54151.2021.9749679","url":null,"abstract":"Layered conductors are widely adopted in critical structures of the engineering fields including aerospace, energy, chemical, etc. Due to the harsh environment, they are prone to such hidden flaws as wallthinning defects (WTD) which conceal themselves particularly at the interfaces between layers, and undermine the mechanical strength as well as integrity of engineering structures. This makes it imperative to detect and evaluate hidden WTD via effective nondestructive evaluation (NDE) methods. Pulse-modulation eddy current (PMEC) has been found to be superior to other NDE techniques in detection, imaging and assessment of back-surface flaws in conductive slabs. It could be one of the promising methods for evaluation of hidden WTD in layered conductors. In this paper, an analytical model of PMEC inspection of hidden WTD is established. Following the theoretical simulations based on the model, the excitation parameters of PMEC especially the carrier frequency are sought. Together with the optimal excitation parameters determined, a testing system of PMEC imaging and evaluation of hidden WTD is built up. The experimental results along with the simulations indicate the feasibility of PMEC for high-sensitivity detection and high-accuracy evaluation of hidden WTD in layered conductors.","PeriodicalId":425658,"journal":{"name":"2021 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130450557","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

Investigation on pulsed eddy current testing of metal corrosions based on focusing probe 基于聚焦探头的脉冲涡流金属腐蚀检测研究

2021 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2021-12-14 DOI: 10.1109/FENDT54151.2021.9749656

Fan Yang, Wenfeng Huang, Yuewen Fu, Zhaohu Yu

引用次数: 0

Rail defect identification method based on pulsed eddy current detection and Small-DCNN 基于脉冲涡流检测和Small-DCNN的钢轨缺陷识别方法

2021 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2021-12-14 DOI: 10.1109/FENDT54151.2021.9749672

B. Liu, Huiling Hu, Jie Peng, Yuxin Zhou, Xiaocui Yuan

{"title":"Rail defect identification method based on pulsed eddy current detection and Small-DCNN","authors":"B. Liu, Huiling Hu, Jie Peng, Yuxin Zhou, Xiaocui Yuan","doi":"10.1109/FENDT54151.2021.9749672","DOIUrl":"https://doi.org/10.1109/FENDT54151.2021.9749672","url":null,"abstract":"Accurate and rapid identification of defect was an important guarantee for the safe operation of equipment. In order to avoid the shortcomings of time-consuming and subjective factors in the feature extraction process, a defect recognition pipeline based on pulsed eddy current testing (PECT) and Small Deep Convolutional Neural Network (S-DCNN) was proposed. Firstly, the one dimensional (1-D) defect signal was obtained from the PECT experiment. Secondly, the above-mentioned 1-D signal was transformed into a two-dimensional time-frequency representation (2-D TFR) by using the Smooth Pseudo Wille-Velle Distribution with Contour (SPWVD-C) method. Lastly, the above-mentioned 2-D TFR was used as the input of the S-DCNN, which consisted of four convolutional layers (Cons) and a fully connected layer (FC). Experimental results showed that the proposed SPWVD-C method could obtain more accurate and clearer 2-D TFR than other common-used time-frequency transform methods such as Ensemble Empirical Mode Decomposition (EEMD), Short-time Fourier Transform (STFT), and Synchronous Wavelet Transforms (SSWT). The formed S-DCNN was more simple and effective than VGG architectures (such as VGG11, VGG16 and VGG19), and had significant advantages as far as recognition accuracy and time cost. The propose pipeline was suitable for non-destructive testing and other engineering applications where it was difficult to obtain a large number of training samples.","PeriodicalId":425658,"journal":{"name":"2021 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132681206","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

Ultrasonic inspection method for residual stress gradient distribution 残余应力梯度分布的超声检测方法

2021 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2021-12-14 DOI: 10.1109/FENDT54151.2021.9749665

Yuren Lu, Er-hong Li, Chunguang Xu, Xiao-hui Zhang, Xiaoxia Li

引用次数: 0

Research on Vertical Crack Detection Method with Multi-Mode TFM 基于多模态TFM的垂直裂纹检测方法研究

2021 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2021-12-14 DOI: 10.1109/FENDT54151.2021.9749650

Lan Liu, Lin Luo, Xiaorong Gao, Jianping Peng, Chaoyong Peng, Ruyu Ma

{"title":"Research on Vertical Crack Detection Method with Multi-Mode TFM","authors":"Lan Liu, Lin Luo, Xiaorong Gao, Jianping Peng, Chaoyong Peng, Ruyu Ma","doi":"10.1109/FENDT54151.2021.9749650","DOIUrl":"https://doi.org/10.1109/FENDT54151.2021.9749650","url":null,"abstract":"Total Focusing Method (TFM) is an advanced ultrasound array data post-processing imaging algorithm, which shows great potential in defect detection and characterization. By changing the path of the focused sound beam, defects can be detected in multiple directions. In this paper, a variety of full-focus simulations and experiments of sound beam path focusing are carried out for the more harmful vertical cracks, and the detection and evaluation are conducted. The following results are obtained: The Direct Mode can perform fixed-length detection of the lower surface cracks, but can't be shaped; The Half-Wave Mode can not only fix the length of the bottom surface cracks, but also fix the shape; The Full-Wave Mode can only fix the length detection of the upper surface cracks; The Full-Wave + Mode can not only fix the length but also shape the detection of the upper surface cracks. The research results show that when detecting defects, for detecting vertical cracks at different positions, choosing an appropriate mode will be more beneficial to the detectable rate and quantitative evaluation of defects.","PeriodicalId":425658,"journal":{"name":"2021 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121564602","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 Foundation Settlement Detection Method of Large Crude Oil Storage Tank 大型原油储罐地基沉降检测方法研究

2021 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2021-12-14 DOI: 10.1109/FENDT54151.2021.9749659

Yongtao Zhao, Jinchi Zhang, Yuhan Zhang, Yuming Lin

引用次数: 1

Study on The Ultrasonic-Assited Casting 超声辅助铸造的研究

2021 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2021-12-14 DOI: 10.1109/FENDT54151.2021.9749658

Wen-kai Li, Yue Jian, Yong-sheng Zhang, Wenxiang Hu, Chunguang Xu, Wenyu Song

引用次数: 0

Converging thermoelastic bulk waves using a ring-shaped laser ultrasonic technique and application to thickness detection 利用环形激光超声技术收敛热弹性体波及其在厚度检测中的应用

2021 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2021-12-14 DOI: 10.1109/FENDT54151.2021.9749648

Renjie Xue, Xiaochen Wang, Quan Yang, Dong Xu, Y. Sun, Jianwei Zhao

{"title":"Converging thermoelastic bulk waves using a ring-shaped laser ultrasonic technique and application to thickness detection","authors":"Renjie Xue, Xiaochen Wang, Quan Yang, Dong Xu, Y. Sun, Jianwei Zhao","doi":"10.1109/FENDT54151.2021.9749648","DOIUrl":"https://doi.org/10.1109/FENDT54151.2021.9749648","url":null,"abstract":"The laser ultrasonic contralateral detection method for material inspections mainly uses longitudinal waves with strong energy in the ablation mechanism. The effect is perfect, but it does not meet non-destructive testing (NDT) requirements due to the damage to the material surface. The thermoelastic mechanism conforms to the principle of NDT, but the excited ultrasonic energy is relatively weak. In this work, an ultrasonic converging method was studied to enhance the signal in the thermoelastic regime based on the phased array principle using a ring-shaped laser ultrasonic technique. An axicon and a convex lens were used to irradiate a ring-shaped laser on an aluminum sample to induce the bulk ultrasound. A two-wave mixing interferometer with a photorefractive crystal was used to measure the ultrasound. The signals were superim-posed at the detection point on the center axis of the laser ring, and the amplitude was enhanced. The ultrasonic signals were affected by the width and diameter of the laser ring. A novel thickness measurement method was proposed in a non-destructive and non-contact manner. The flight times of successive echoes were observed as features to reconstruct thickness.","PeriodicalId":425658,"journal":{"name":"2021 IEEE Far East NDT New Technology & Application Forum (FENDT)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114315517","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