Ndt & E International最新文献

{"title":"Pose control and profile tracking with eddy current sensor and robotic arm for NDT applications","authors":"Fengkuan Zhu,&nbsp;Xue Bai,&nbsp;Zihan Xia,&nbsp;Tian Meng,&nbsp;Xiaofei Liu,&nbsp;Wuliang Yin,&nbsp;Wuqiang Yang","doi":"10.1016/j.ndteint.2024.103312","DOIUrl":"10.1016/j.ndteint.2024.103312","url":null,"abstract":"<div><div>For industrial quality control, non-destructive testing (NDT) of complex metallic parts relies on the accurate knowledge of the object’s surface profile. Currently, this information is typically obtained through design documents or separate dedicated measurements. This study realizes non-contact, accurate reconstruction of metallic surface profiles, eliminating the need for obtaining prior knowledge of the object’s shape and position relative to the sensor. An EC sensor is fixed to the end-effector of a UR5 robotic arm (RA), and its signals are used to control the pose of the RA, keeping its axis perpendicular to the local surface and maintaining a specific lift-off distance. The metallic surface profile can be reconstructed from the scanning trajectory of the RA. In experiments, the surface of a cylindrical metallic pipe is reconstructed without prior information, with the root mean square error (RMSE) of the surface profile being lower than 0.17 mm. An example of automatic tracking and scanning of a tapered exhaust pipe is also provided.</div></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"151 ","pages":"Article 103312"},"PeriodicalIF":4.1,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy concentration degree periodical variation rule of fatigue crack-induced second harmonic non-axisymmetric guided wave within circular tubes","authors":"Zhou Fang,&nbsp;Conglin Lin,&nbsp;Yanwei Huang","doi":"10.1016/j.ndteint.2024.103314","DOIUrl":"10.1016/j.ndteint.2024.103314","url":null,"abstract":"<div><div>The position of a macrocrack within a circular tube can be determined through the periodic energy distribution variation of a linear non-axisymmetric guided wave. However, to determine the positions of a microcrack within a circular tube is still a difficult job, even for the nonlinear guided wave. Unlike the linear guided wave can detect the axial position through the reflection from a macrocrack, a fatigue crack does not even cause remarkable reflection. This paper investigates the energy concentration degree periodical variation rule of fatigue crack-induced second harmonic non-axisymmetric guided wave within a circular tube. The quantitative relationship between the energy concentration degree and its propagated axial distance is potential to be used to detect a fatigue crack and characterize its axial, circumferential positions. To facilitate the investigation, a specific frequency extracting method was optimized to extract the second harmonic non-axisymmetric guided wave. In addition, an energy concentration degree coefficient was designed to characterize the energy distribution. The fundamental, numerical and experimental work were implemented to verify the studied energy concentration degree periodical variation rule.</div></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"151 ","pages":"Article 103314"},"PeriodicalIF":4.1,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrasound imaging using SPOMA: Simultaneous Plane-waves with genetic algorithm Optimization and fast delay-multiply-and-sum Multiple Acquisitions","authors":"Victor H.R. Machado ,&nbsp;Matheus A. Burda ,&nbsp;Tatiana de A. Prado ,&nbsp;Glauber Brante ,&nbsp;Thiago A.R. Passarin ,&nbsp;Giovanni A. Guarneri ,&nbsp;Joaquim M. Maia ,&nbsp;Gustavo P. Pires ,&nbsp;Daniel R. Pipa","doi":"10.1016/j.ndteint.2024.103308","DOIUrl":"10.1016/j.ndteint.2024.103308","url":null,"abstract":"<div><div>Ultrasound imaging in industrial and NDT applications is an important tool for diagnosis and monitoring. Reducing signal acquisition time is often desirable to, e.g., lower the costs of inspection campaigns, such as in long oil pipelines. Nevertheless, even fast imaging algorithms such as Coherence Plane-Wave Compounding (CPWC) require a fair amount of data, which typically lengthens inspection times. In this paper, we propose an inspection scheme in which plane-waves with different angles are emitted simultaneously in order to further reduce the acquisition time. Using coded excitation in the emission and filter banks in the reception, the signals can be separated for subsequent processing as if they were emitted at different instants. To design both signal shapes and matched filters, we developed a procedure that minimizes the sidelobes of the auto- and cross-correlation using a genetic algorithm. The proposed scheme is denoted by Simultaneous Plane-waves with genetic algorithm Optimization and fast delay-multiply-and-sum Multiple Acquisitions (SPOMA). Results show that the proposed genetic algorithm outperforms other methods from the literature in terms of sidelobe minimization in the simultaneous ultrasound field. Due to hardware limitations in the ultrasound system, the emitted signals could not be generated as arbitrarily as desired, constraining the sidelobe minimization and resulting in artifacts in the reconstructed image. To address these artifacts, a combination of CPWC-delayed samples, spatial apodization, and fast delay-multiply-and-sum techniques was employed, yielding a trade-off between image quality and acquisition time, while keeping the computational cost of post-processing low. Experimental results show that the proposed SPOMA scheme achieves better image quality using less acquisition time when compared to conventional non-simultaneous plane-wave imaging.</div></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"151 ","pages":"Article 103308"},"PeriodicalIF":4.1,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cavity detection and localization based on pitch analyses and applications of multitask learning","authors":"Ngoc Quy Hoang ,&nbsp;Seonghun Kang ,&nbsp;Hyung-Koo Yoon ,&nbsp;Woojin Han ,&nbsp;Jong-Sub Lee","doi":"10.1016/j.ndteint.2024.103317","DOIUrl":"10.1016/j.ndteint.2024.103317","url":null,"abstract":"<div><div>This study developed an anomaly detection method that utilizes a characteristic cavity-borne pitch and a nonparametric filter based on localized autocorrelation. Employing a simulated model cavity, microphone tests were conducted to obtain acoustic signals. Experimental findings revealed that the fundamental frequency of the cavity was approximately 174.3 Hz, and likelihood of cavity presence decreased with increasing cavity distance while free boundaries and looser sand density increased this likelihood. In addition, the proposed nonparametric filter enhanced accuracy of classification and cavity distance estimation of multitask learning models. This study suggests that the proposed methods can effectively detect and localize cavities.</div></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"151 ","pages":"Article 103317"},"PeriodicalIF":4.1,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental investigation of defect imaging using a phased array probe with a stacked plate buffer","authors":"Mingqian Xia,&nbsp;Takahiro Hayashi,&nbsp;Naoki Mori","doi":"10.1016/j.ndteint.2024.103316","DOIUrl":"10.1016/j.ndteint.2024.103316","url":null,"abstract":"<div><div>The authors have previously validated defect imaging using stacked plate buffer and a phased array probe by numerical simulations. This study experimentally verifies the feasibility of this approach. A stacked plate buffer created by considering the dispersion of the S0 mode of Lamb waves was used for the first experiments, which showed that high intensity spurious areas appeared and defect images were blurred. Numerical analysis of the propagation of S0 modes in the plate revealed that trailing waves cause the high intensity spurious areas. Theoretical and numerical analyses indicated that the trailing waves can be removed by increasing the width of the plate. Finally, experiments using wider plates verified that a phased array probe with a stacked plate buffer can eliminate the high intensity spurious areas and clarify the defect images.</div></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"151 ","pages":"Article 103316"},"PeriodicalIF":4.1,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reverse time migration damage morphology reconstruction algorithm based on laser ultrasonic circular sensing array","authors":"Shanpu Zheng ,&nbsp;Ping Tang ,&nbsp;Guoyang Teng ,&nbsp;Ying Luo ,&nbsp;Weican Guo","doi":"10.1016/j.ndteint.2024.103309","DOIUrl":"10.1016/j.ndteint.2024.103309","url":null,"abstract":"<div><div>In response to the quantitative detection needs of damage in large metal thin-walled structures, this paper uses laser ultrasonic detection technology to excite and collect ultrasonic waves, and improves the traditional reverse time migration imaging algorithm to achieve the goal of reconstructing damage morphology. By analyzing the acoustic scattering characteristics, the theoretical basis was provided for damage reconstruction based on circular sensing arrays, and algorithm improvements were made to the traditional time reversal based reverse time migration imaging technology(TR-RTM) in terms of scattered wave extraction and reconstruction accuracy evaluation. We have built a laser ultrasonic detection platform and achieved accurate reconstruction of regular damages such as circles, triangles, and squares based on array wavefield data. However, for irregular damages with dents and sharp corners, we can only reconstruct their approximate contours and analyzed the reasons that limit imaging accuracy. This study laid a theoretical and experimental foundation for the quantitative assessment of damage.</div></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"151 ","pages":"Article 103309"},"PeriodicalIF":4.1,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accurate monitoring of additive manufacturing quality using non-specular reflection of bounded ultrasonic beams","authors":"Jiaxiang Wang,&nbsp;Mingxi Deng","doi":"10.1016/j.ndteint.2024.103315","DOIUrl":"10.1016/j.ndteint.2024.103315","url":null,"abstract":"<div><div>This study introduces a viable methodology that leverages the phenomenon of non-specular reflection of bounded ultrasonic beams within a liquid-solid plate-liquid configuration to precisely monitor the quality of components produced through additive manufacturing (AM). The investigation delves into the relationship between non-specular reflection and some key parameters, including the degradation of AM components' quality and the incident angle of bounded ultrasonic beams. Through a detailed exploration of the propagation behaviors of bounded ultrasonic beams within a water-AM components-water configuration via finite element (FE) simulations, it becomes evident that the specular reflection coefficient (SRC) serves as a pivotal indicator of the non-specular reflection phenomenon. Notably, the simulation results indicate that the change rate of SRC at the S0 critical angle (CR_S0) reveals a significant, monotonically increasing sensitivity to the degradation in the quality of AM components. This discovery unveils a robust approach for precisely monitoring the quality of AM components. Furthermore, the experimental result also demonstrates that the parameter CR_S0 exhibits highly sensitive characteristics to the degradation in the quality of AM components when a bounded ultrasonic beam is incident at the S0 critical angle onto the AM components. Concurrently, the presence of irregular holes on the surface of AM components, as shown by the metallographic analysis result, substantiates the effectiveness of the parameter CR_S0. This investigation affirms that the CR_S0-based method is a feasible non-destructive evaluation one for accurately monitoring the quality of AM components.</div></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"151 ","pages":"Article 103315"},"PeriodicalIF":4.1,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Terahertz-based optical parameters analysis and quantitative inclusion defects detection in glass fiber-reinforced polymer laminate","authors":"Yu Liu ,&nbsp;Yefa Hu ,&nbsp;Xinhua Guo ,&nbsp;Jinguang Zhang ,&nbsp;Xu Xia ,&nbsp;Kai Fu","doi":"10.1016/j.ndteint.2024.103310","DOIUrl":"10.1016/j.ndteint.2024.103310","url":null,"abstract":"<div><div>Inclusion defects are often introduced in the manufacturing process of glass fiber-reinforced polymer (GFRP) components, which can be effectively identified by Terahertz (THz) technology. However, accurate measurement of the size and location of defects for engineering applications remains a challenge. In this study, based on the optical parameters of GFRP laminate, a quantitative detection of inclusion defects was conducted. For defect area measurement, a defect area measurement algorithm based on super-resolution generative adversarial network (DAMSRGAN) was proposed, enhancing measurement accuracy by employing generative adversarial networks to improve image resolution. The final quantification of defect area was achieved through a combination of threshold segmentation and blob analysis. Compared to traditional methods for characterizing defect areas based on raw low-resolution time-of-flight tomography (TOFT) images, the proposed algorithm effectively enhances measurement accuracy. For defect depth measurement, the influence of the number of layers and ply angles of GFRP laminates on THz optical parameters was studied, revealing an approximate linear relationship between the number of layers and refractive index of GFRP laminates. Based on this relationship, the refractive index of the tested GFRP sample can be estimated, thereby eliminating the need to remove it from the assembled structure for optical parameter measurement. Furthermore, defect depth information can be calculated based on the estimated refractive index, enhancing the convenience of detecting GFRP defect depth using THz technology. This study provides a valuable supplement for the accurate and convenient measurement of inclusion defects in GFRP components using THz technology.</div></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"151 ","pages":"Article 103310"},"PeriodicalIF":4.1,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrasonic defect detection in a concrete slab assisted by physics-informed neural networks","authors":"Sangmin Lee ,&nbsp;John S. Popovics","doi":"10.1016/j.ndteint.2024.103311","DOIUrl":"10.1016/j.ndteint.2024.103311","url":null,"abstract":"<div><div>Traditional nondestructive testing (NDT) methods face challenges to accurately assess concrete owing to its naturally inhomogeneous nature that complicates spatial characterization of material properties. To address these limitations, this work considers physics-informed neural networks (PINNs) interpreting contactless ultrasonic scan data to enhance defect detection capabilities in concrete. PINNs integrate physics laws through mathematical governing equations into artificial neural network models to overcome limitations of purely data-driven analysis approaches. The study utilizes experimental data collected from a large-scale concrete slab containing inclusion, cold joints with cracks, and surface fire damage and from a homogeneous PMMA slab (as a reference). The PINN results are used to create space-dependent property maps based on the extracted coefficient of the governing wave equation using a simple time-domain wavefield data set. The results demonstrate that PINNs effectively predict space-dependent wave velocities. This approach facilitates accurate material property characterization and defect identification. The proposed PINN models achieved a P-wave velocity prediction error of 0.34 % for the PMMA slab and identified areal extent of defects in the concrete slab with errors of 1 % for pristine areas and 2.1 % for inclusion areas. Sub-wavelength-sized cracks around the inclusion areas were detected from the predicted wave velocity map. These findings suggest that PINNs offer a promising approach for improving the accuracy and efficiency of defect detection in concrete structures with superior spatial resolution provided by other conventional ultrasonic imaging approaches.</div></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"151 ","pages":"Article 103311"},"PeriodicalIF":4.1,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eddy current thermography detection method for internal thickness reduction in ferromagnetic components based on magnetic permeability perturbation","authors":"Zhiyang Deng ,&nbsp;Zhilong Li ,&nbsp;Nan Yang ,&nbsp;Jianbo Wu ,&nbsp;Xiaochun Song ,&nbsp;Yihua Kang","doi":"10.1016/j.ndteint.2024.103313","DOIUrl":"10.1016/j.ndteint.2024.103313","url":null,"abstract":"<div><div>Eddy current thermography (ECT), as an emerging nondestructive testing (NDT) technique, has been used for defect detection in many critical components. However, the skinning effect of eddy currents limits the ability of ECT to detect internal defects in thick-walled pipes. An ECT detection method for thickness reduction of ferromagnetic components based on magnetic permeability perturbation (MPP-ECT) under DC magnetization is proposed. The thickness reduction cause MPP phenomenon on the surface of ferromagnetic components. Then under high-frequency AC excitation, the thinning area affected by MPP will produce a different thermal response from the normal area, which is recognized and captured by an infrared camera. The mechanism of MPP-based thinning defect detection is analyzed through a theoretical model, and the relationship between thinning thickness, relative permeability and thermal response is established. The feasibility of the MPP-ECT detection method is verified through a series of simulations and experiments. The experimental results show that the method can effectively detect the thinning defect of 4.2 % wall thickness on the back of 12 mm thick specimens. The thermal response of both the thinning and normal areas decreases with increasing magnetization intensity, and the thermal response of the thinning area decreases with increasing thinning thickness. However, the thermal contrast (peak-to-peak value of thermal response) between the two regions increases with the increase of magnetization intensity and thinning thickness. This method can be used for detection under high lift off and weakens the skin effect of ECT for the internal thickness reduction, which has great practical value.</div></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"151 ","pages":"Article 103313"},"PeriodicalIF":4.1,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}