Ndt & E International最新文献_第7页

The volumetric ultrasound imaging strategy for quantification of the defects in concrete based on the optimized cumulative kurtosis method 基于优化累积峰度法的混凝土缺陷量化体积超声成像策略

IF 4.1 2区材料科学

Ndt & E International Pub Date : 2024-07-25 DOI: 10.1016/j.ndteint.2024.103203

Lu Zhang , Shangda Jia , Chong Qiao , Yongze Tang , Hongyu Li , Tonghao Zhang

{"title":"The volumetric ultrasound imaging strategy for quantification of the defects in concrete based on the optimized cumulative kurtosis method","authors":"Lu Zhang , Shangda Jia , Chong Qiao , Yongze Tang , Hongyu Li , Tonghao Zhang","doi":"10.1016/j.ndteint.2024.103203","DOIUrl":"10.1016/j.ndteint.2024.103203","url":null,"abstract":"<div><p>Currently, ultrasonic tomography is widely used for quantifying the status of damage/flaw in various materials including metal, concrete, and composite. It is capable of visualizing the internal damage or flaws by reconstructing the velocity of ultrasound. For most cases, the conventional ultrasonic tomography is adapted for slice-based investigations. Though 3D image can be generated by slice-based method, the involvement of multi-scan interpolation caused high computational cost and unexpected errors. Moreover, for 3D imaging, two essential factors are dominant: (i) reconstructing the velocity; and (ii) scheme of forming up the 3D image. To this end, this study proposed to develop a novel volumetric ultrasound imaging strategy with high accuracy. To obtain more accurate Time-of-Flight (TOF) for ultrasonic velocity, an improved method based on cumulative kurtosis is proposed. With the proposed method, the adverse influence of internal complexity within samples on ultrasound was reduced. The proposed novel volumetric ultrasound imaging strategy was verified numerically and experimentally. Finally, the performance of the proposed method has been evaluated by the comparison of three-dimensional imaging results with different inclusion. Additionally, the parametric study was conducted using path average velocity, voxel velocity, and image accuracy. The results show a positive correlation between the number of voxels and imaging accuracy. However, as the number of voxels increases, the errors introduced by the Simultaneous Algebraic Reconstruction Technique (SART) increase. The influential factors on the imaging accuracy were discussed, such as inclusion eccentricity, the relationship among the reduced volume imaging quantity, and accuracy in voxel inversion result. For further application, the recommendations were also provided.</p></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"147 ","pages":"Article 103203"},"PeriodicalIF":4.1,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141950477","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}

引用次数: 0

Edge blurring suppression of ultrasonic reflection coefficients in contact state measurement 在接触状态测量中抑制超声波反射系数的边缘模糊

IF 4.1 2区材料科学

Ndt & E International Pub Date : 2024-07-22 DOI: 10.1016/j.ndteint.2024.103201

Xingyuan Wang , Chonglin Xu , Fulai Yang

{"title":"Edge blurring suppression of ultrasonic reflection coefficients in contact state measurement","authors":"Xingyuan Wang , Chonglin Xu , Fulai Yang","doi":"10.1016/j.ndteint.2024.103201","DOIUrl":"10.1016/j.ndteint.2024.103201","url":null,"abstract":"<div><p>Ultrasonic reflection coefficient is the key to contact state evaluation of mechanical devices. Edge blurring can lead to contact state (such as stress concentrations) measurement errors. This reduces the reliability of performance evaluations and introduces potential security risks. In this study, an edge blurring suppression method based on matching pursuit algorithm was proposed. Firstly, the interference signal prediction model is built based on the Nakagami model. Then, a blurred signal separation algorithm based on matching pursuit is proposed to obtain the effective signal. Finally, the reflection coefficient with and without edge blurring effect were obtained. The simulation results show that the maximum relative error of the reflection coefficient is reduced from 219 % to 15 %. The effectiveness of the proposed method is also verified by experiments. The experimental results show that the relative error of the reflection coefficient after edge blurring suppression is reduced from 64 % to 16 %. This indicates that the proposed method can effectively suppress edge blurring, which provides an effective method for edge blurring suppression in various application fields of ultrasonic measurement and improve the reliability of product quality evaluation.</p></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"147 ","pages":"Article 103201"},"PeriodicalIF":4.1,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141960190","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}

引用次数: 0

FTnet: An integrated network for fusing multi-modal NDE data of lightning damage in aircraft composite materials FTnet：融合飞机复合材料雷击损伤多模态无损检测数据的综合网络

IF 4.1 2区材料科学

Ndt & E International Pub Date : 2024-07-20 DOI: 10.1016/j.ndteint.2024.103196

Yanshuo Fan , Rakiba Rayhana , Catalin Mandache , Marc Genest , Zheng Liu

{"title":"FTnet: An integrated network for fusing multi-modal NDE data of lightning damage in aircraft composite materials","authors":"Yanshuo Fan , Rakiba Rayhana , Catalin Mandache , Marc Genest , Zheng Liu","doi":"10.1016/j.ndteint.2024.103196","DOIUrl":"10.1016/j.ndteint.2024.103196","url":null,"abstract":"<div><p>Lightning strikes pose a significant challenge for aircraft and wind turbine blades with Carbon Fiber Reinforced Polymer (CFRP) structures, requiring reliable damage detection techniques. Non-destructive evaluation (NDE) methods, including X-ray and Ultrasonic Testing, are effective in identifying material damage in aircraft. However, X-ray requires access to both sides of the structure, and UT requires a coupling medium between the transducer and the structure, as well as a relatively smooth surface, making both methods less feasible for routine aircraft maintenance. Other NDE techniques, such as eddy current testing and infrared thermography, can detect damage on the side struck by lightning but lack the precision needed for a comprehensive assessment. To address these challenges, this paper introduces a two-stage Fusion-Translation network (FTnet), which integrates NDE 4.0 innovations, including data fusion and advanced imaging algorithms, to optimize the NDE process. By integrating infrared and eddy current data, FTnet characterizes lightning-induced damage with enhanced depth and contour detail, demonstrating superior performance over existing methods in both qualitative and quantitative evaluations. The implementation of FTnet marks an advancement in NDE 4.0, potentially enhancing aircraft safety and streamline maintenance protocols by providing a more reliable and comprehensive assessment of lightning strike damage.</p></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"147 ","pages":"Article 103196"},"PeriodicalIF":4.1,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141839913","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}

引用次数: 0

Non-destructive characterisation of pearlitic steel microstructure at room temperature and in-situ microstructure development during heat treatment using electromagnetic sensors 利用电磁传感器对珠光体钢室温下的微观结构和热处理过程中的原位微观结构发展进行无损表征

IF 4.1 2区材料科学

Ndt & E International Pub Date : 2024-07-18 DOI: 10.1016/j.ndteint.2024.103199

L. Zhou , F. Wu , M.A. Jolfaei , S. Hobson , C.L. Davis

{"title":"Non-destructive characterisation of pearlitic steel microstructure at room temperature and in-situ microstructure development during heat treatment using electromagnetic sensors","authors":"L. Zhou , F. Wu , M.A. Jolfaei , S. Hobson , C.L. Davis","doi":"10.1016/j.ndteint.2024.103199","DOIUrl":"10.1016/j.ndteint.2024.103199","url":null,"abstract":"<div><p>Pearlitic steels are important engineering materials in various high-strength applications. Their mechanical properties are influenced by microstructure control using chemical composition and/or thermomechanical processing. In the current study, a novel, non-destructive technique is presented for the characterisation of key microstructure parameters that are essential for strength, both at room temperature and during dynamic heat treatment. The pearlite interlamellar spacing in a 0.81 wt% C steel has been accurately measured at room temperature using an electromagnetic (EM) sensor. Furthermore, the spheroidisation process in 100Cr6 pearlitic steel has been monitored at elevated temperatures. A strong linear relationship between the EM sensor signal and the pearlite interlamellar spacing is demonstrated, indicated by an R<sup>2</sup> value of 0.91. Additionally, the capability of this method to track the spheroidisation process in real-time during constant heat treatment offers potential avenues for process optimisation in pearlitic steels.</p></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"147 ","pages":"Article 103199"},"PeriodicalIF":4.1,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141729847","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}

引用次数: 0

Effect of light source wavelength on surface defect imaging in deep-water concrete dams 光源波长对深水混凝土大坝表面缺陷成像的影响

IF 4.1 2区材料科学

Ndt & E International Pub Date : 2024-07-17 DOI: 10.1016/j.ndteint.2024.103198

Dong Chen , Fei Kang , Jing Chen , Sisi Zhu , Hongjun Li

{"title":"Effect of light source wavelength on surface defect imaging in deep-water concrete dams","authors":"Dong Chen , Fei Kang , Jing Chen , Sisi Zhu , Hongjun Li","doi":"10.1016/j.ndteint.2024.103198","DOIUrl":"10.1016/j.ndteint.2024.103198","url":null,"abstract":"<div><p>This study explores the relationship between surface defect imaging in deep-water concrete dams and the wavelength of the light source, aiming to improve concrete defect image quality by varying the wavelength. The underwater optical imaging model of concrete dam surfaces was developed by applying the principle of object reflection and the underwater optical propagation model. This model reflects the effect of different light wavelengths on underwater concrete defect imaging. Through a self-designed underwater optical darkroom test platform, defect image acquisition tests were conducted under various color light conditions. The results reveal the significant influence of light source wavelength on images captured in both air and water. Furthermore, under the same initial illuminance, blue light significantly enhanced the average gray value, sharpness, contrast, and the number of feature points in underwater defect images, exhibiting increments of 2.97 times, 0.48 times, 2.70 times, and 2.95 times, respectively, compared to white light. These findings can serve as a reference for the selection of color-light for the non-destructive testing of surface defects in actual underwater concrete dams.</p></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"147 ","pages":"Article 103198"},"PeriodicalIF":4.1,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141736444","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}

引用次数: 0

Characterization of electro-adhesion using surface waves generated and detected by Laser-Ultrasonics 利用激光超声波产生和检测的表面波表征电附着力

IF 4.1 2区材料科学

Ndt & E International Pub Date : 2024-07-17 DOI: 10.1016/j.ndteint.2024.103191

Mustapha Baher, Meriem Chrifi Alaoui, Frédéric Jenot, Mohammadi Ouaftouh, Marc Duquennoy

{"title":"Characterization of electro-adhesion using surface waves generated and detected by Laser-Ultrasonics","authors":"Mustapha Baher, Meriem Chrifi Alaoui, Frédéric Jenot, Mohammadi Ouaftouh, Marc Duquennoy","doi":"10.1016/j.ndteint.2024.103191","DOIUrl":"10.1016/j.ndteint.2024.103191","url":null,"abstract":"<div><p>Studying and understanding adhesion characteristics between a coating and its substrate is important for improving the reliability of a thin film’s adhesion. To the best of the authors’ knowledge, this work studies for the first time a specific electro-adhesion process using Laser-Ultrasonics. An electric field source is applied to a convenient sample composed of a polyvinyl chloride (PVC) layer on an aluminum (Al) substrate. The aim is to investigate the impact of different electro-adhesion levels on the propagation of surface acoustic waves (SAW), which are generated by a pulsed laser and detected using an interferometer. This non-destructive and non-contact experimental setup allows us to determine the surface modes dispersion curves for each adhesion level. A theoretical model is developed to numerically solve the dispersion relation in order to analyze the influence of the interface quality on the dispersion curves. These ones have also been obtained by the finite element method (FEM) allowing us to predict the shape of the experimental signals. This research paves the way for future studies of specific adhesion phenomena across different materials.</p></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"147 ","pages":"Article 103191"},"PeriodicalIF":4.1,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841117","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}

引用次数: 0

Identifying grain size in ASTM A36 steel using ultrasonic backscattered signals and machine learning 利用超声波反向散射信号和机器学习识别 ASTM A36 钢中的晶粒尺寸

IF 4.1 2区材料科学

Ndt & E International Pub Date : 2024-07-15 DOI: 10.1016/j.ndteint.2024.103181

M.C.A. Viana , P. Pereira , A.A. Buenos , A.A. Santos

{"title":"Identifying grain size in ASTM A36 steel using ultrasonic backscattered signals and machine learning","authors":"M.C.A. Viana , P. Pereira , A.A. Buenos , A.A. Santos","doi":"10.1016/j.ndteint.2024.103181","DOIUrl":"10.1016/j.ndteint.2024.103181","url":null,"abstract":"<div><p>Ultrasonic nondestructive techniques can be useful tools in the microstructural classification of metallic alloys. Among the most common techniques for characterizing materials, backscattered signal analysis stands out because it does not require a back surface echo. This study classifies five ASTM A36 steel samples with varying grain sizes using ultrasonic waves. For each sample, ultrasound signals were obtained using two ultrasonic array probes with center frequencies of 5 and 10 MHz. An extensive feature engineering process was conducted using the tfresh package in Python, which extracts a wide range of features from time series data, transforming raw ultrasound signals into a structured format. Seven machine learning models were evaluated based on accuracy, precision, recall, and F1 score, with performances ranging from 70 to 100%. The <em>XGBoost</em> model exhibited the best performance with 10 MHz probe signals, achieving 100% accuracy. An additional validation test was conducted to evaluate the models’ generalization capability, considering inter-specimen variabilities. Despite a slight reduction in prediction metrics, the <em>XGBoost</em> model maintained good performance, with accuracy between 89% and 100% across all frequencies. Such findings demonstrate that backscattered grain noise can effectively identify grain sizes provided that an adequate machine learning model is used.</p></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"147 ","pages":"Article 103181"},"PeriodicalIF":4.1,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141709467","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}

引用次数: 0

A comparison of X-ray attenuation, differential phase, and dark-field contrast imaging for the detection of porosity in carbon fiber reinforced cyanate ester X 射线衰减、差分相位和暗场对比成像在检测碳纤维增强氰酸酯中孔隙率方面的比较

IF 4.1 2区材料科学

Ndt & E International Pub Date : 2024-07-15 DOI: 10.1016/j.ndteint.2024.103194

Jonathan Glinz , Bernhard Plank , Josephine Gutekunst , Michael Scheerer , Simon Zabler , Johann Kastner , Sascha Senck

{"title":"A comparison of X-ray attenuation, differential phase, and dark-field contrast imaging for the detection of porosity in carbon fiber reinforced cyanate ester","authors":"Jonathan Glinz , Bernhard Plank , Josephine Gutekunst , Michael Scheerer , Simon Zabler , Johann Kastner , Sascha Senck","doi":"10.1016/j.ndteint.2024.103194","DOIUrl":"10.1016/j.ndteint.2024.103194","url":null,"abstract":"<div><p>In this work we explore the capabilities of Talbot-Lau grating interferometry (TLGI) radiography for the inspection of porosity in structural specimens of cyanate ester carbon fiber reinforced polymer. The influence of system resolution and varying specimen thicknesses on mean values and standard deviations (STDV) in all three image modalities acquired by TLGI are addressed. Results show that mean absorption contrast (AC) values are highly affected by specimen thickness and strong negative correlation (r ≤ −0.8) is found only after correction via preliminary thickness measurements. Although dark-field contrast (DFC) is affected by changes in specimen thickness as well, the signal can be corrected by normalization with the inherently available AC. Consequently, strong positive correlation with porosity was found both in high- and low-resolution imaging (r = 0.83 and 0.71 respectively). Without the need for high image resolution or thickness measurements, the normalized DFC is a promising option for large field of view inspections. Investigations of STDV revealed strong positive correlations between porosity and AC STDV as well as differential phase contrast (DPC) STDV (r = 0.95 and 0.92 respectively) but high image resolution is required. Furthermore, results suggest increased robustness against variations in specimen thickness of AC and DPC STDV analyses.</p></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"147 ","pages":"Article 103194"},"PeriodicalIF":4.1,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0963869524001592/pdfft?md5=b9f3f5efc3a1c3eae9db036a5108e130&pid=1-s2.0-S0963869524001592-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141636646","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}

引用次数: 0

Optimizing guided wave propagation for sensitive axial stress measurement in steel pipes 优化导波传播，实现钢管轴向应力的灵敏测量

IF 4.1 2区材料科学

Ndt & E International Pub Date : 2024-07-15 DOI: 10.1016/j.ndteint.2024.103182

Sen Deng, Xinqi Tian, Yeping Liu, Bo Zhao, Weijia Shi, Jiubin Tan

{"title":"Optimizing guided wave propagation for sensitive axial stress measurement in steel pipes","authors":"Sen Deng, Xinqi Tian, Yeping Liu, Bo Zhao, Weijia Shi, Jiubin Tan","doi":"10.1016/j.ndteint.2024.103182","DOIUrl":"10.1016/j.ndteint.2024.103182","url":null,"abstract":"<div><p>Steel pipe structures are commonly used in the industrial field. Stress-induced structural failures can have a significant impact on equipment safety. Therefore, effective stress monitoring is a crucial area of research. Constrained by the multi-frequency and multi-modal characteristics of ultrasonic guided waves, the limitations of traditional stress measurement methods based on these waves lie in the lack of a systematic analysis of the impact of multi-modal fused signals on stress measurement. To explore the optimal guided wave stress measurement strategy, a mathematical model for the propagation of longitudinal guided waves in prestressed steel pipes, based on the principles of acoustoelasticity, is proposed. Using this model, the sensitivity of stress to each sub-mode of the longitudinal guided waves is analyzed, leading to the identification of the optimal guided wave mode (L(0,2) mode) and frequency range. In order to avoid the excitation of other low-sensitivity modes, further analysis of the optimal parameters for the piezoelectric array is conducted. Simulation results indicate that the designed transducer can effectively excite the target mode with high purity. The stress sensitivity of the target mode was experimentally determined to be <span><math><mrow><mo>−</mo><mn>2</mn><mo>.</mo><mn>5</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>5</mn></mrow></msup><mspace></mspace><msup><mrow><mtext>MPa</mtext></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span>, which closely aligns with the theoretical results. Comparative analysis of the experiments emphasizes the influence of modal control on measurement outcomes. By selecting and controlling the appropriate mode, the maximum relative error in stress measurement is observed to be 5%.</p></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"147 ","pages":"Article 103182"},"PeriodicalIF":4.1,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141705287","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}

引用次数: 0

Geometric artifacts correction of equiangular fan-beam industrial CT system 等角扇形梁工业 CT 系统的几何伪影校正

IF 4.1 2区材料科学

Ndt & E International Pub Date : 2024-07-15 DOI: 10.1016/j.ndteint.2024.103197

Shu Xu , Jinyin Sheng , Zhongming Li , Chao Long , Yijun Jiang , Hui Tan , Liming Duan

{"title":"Geometric artifacts correction of equiangular fan-beam industrial CT system","authors":"Shu Xu , Jinyin Sheng , Zhongming Li , Chao Long , Yijun Jiang , Hui Tan , Liming Duan","doi":"10.1016/j.ndteint.2024.103197","DOIUrl":"10.1016/j.ndteint.2024.103197","url":null,"abstract":"<div><p>To address the issue of geometric artifacts in equiangular fan-beam industrial computed tomography (CT) systems, this paper proposes a projection sinogram-based method for correcting these artifacts. Firstly, we discuss the formation mechanism of geometric artifacts in equiangular fan-beam industrial CT system when there is geometric deviation. Secondly, we establish a geometric model that incorporates these deviations and mathematically describe the projected position curve of a point within the plane. Subsequently, we use a needle gauge as a surrogate for the point, and fit the curve in the projection sinusoidal graph obtained from scanning the needle gauge to calibrate the geometric deviations. Finally, we introduce the calibrated geometric deviations into the filtered back projection (FBP) algorithm to achieve more accurate reconstructed images. The proposed method precisely calibrates geometrical deviations in the equiangular fan-beam industrial computed tomography (CT) system and effectively eliminates geometric artifacts in the reconstructed CT images, this is demonstrated by simulation and practical experiment. This method has also been successfully applied in engineering practice.</p></div>","PeriodicalId":18868,"journal":{"name":"Ndt & E International","volume":"147 ","pages":"Article 103197"},"PeriodicalIF":4.1,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141703852","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}

引用次数: 0