Pub Date : 2020-10-23DOI: 10.1080/09349847.2020.1834657
N. Brierley, R. A. Smith, N. Turner, R. Culver, T. Maw, A. Holloway, O. Jones, P. Wilcox
ABSTRACT In the UK, the NDE community is making a coordinated effort to underpin and enable the full benefits of the large-scale trend toward comprehensive digitalization and automation of industrial processes and assets, frequently referred to as “Industry 4.0”. Certain facets of what is now considered to be NDE 4.0 have been the subject of research for some time and have already gained industrial traction, while others are quite new, with unexplored potential and pitfalls. However, in these areas there is scope for learning from progress in fields outside of, but related to, NDE such as dimensional metrology. This paper reviews progress to date based on UK activities, considers some planned and potential research tasks in this domain, and highlights the major challenges the NDE community must tackle. In particular, as interoperability and data reuse are key features of Industry 4.0 practices, international and cross-domain efforts on data format standardization are needed. It is clear that, without the NDE community stepping up to the challenge, much of Industry 4.0 cannot be realized; yet if the NDE 4.0 vision is implemented comprehensively, NDE has the potential to become more capable, more valuable, and therefore more highly valued.
{"title":"Advances in the UK Toward NDE 4.0","authors":"N. Brierley, R. A. Smith, N. Turner, R. Culver, T. Maw, A. Holloway, O. Jones, P. Wilcox","doi":"10.1080/09349847.2020.1834657","DOIUrl":"https://doi.org/10.1080/09349847.2020.1834657","url":null,"abstract":"ABSTRACT In the UK, the NDE community is making a coordinated effort to underpin and enable the full benefits of the large-scale trend toward comprehensive digitalization and automation of industrial processes and assets, frequently referred to as “Industry 4.0”. Certain facets of what is now considered to be NDE 4.0 have been the subject of research for some time and have already gained industrial traction, while others are quite new, with unexplored potential and pitfalls. However, in these areas there is scope for learning from progress in fields outside of, but related to, NDE such as dimensional metrology. This paper reviews progress to date based on UK activities, considers some planned and potential research tasks in this domain, and highlights the major challenges the NDE community must tackle. In particular, as interoperability and data reuse are key features of Industry 4.0 practices, international and cross-domain efforts on data format standardization are needed. It is clear that, without the NDE community stepping up to the challenge, much of Industry 4.0 cannot be realized; yet if the NDE 4.0 vision is implemented comprehensively, NDE has the potential to become more capable, more valuable, and therefore more highly valued.","PeriodicalId":54493,"journal":{"name":"Research in Nondestructive Evaluation","volume":"44 1","pages":"306 - 324"},"PeriodicalIF":1.4,"publicationDate":"2020-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75748060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-03DOI: 10.1080/09349847.2020.1826613
Songping Liu, Feifei Liu, Yuseng Yang, Legang Li, Zhiying Li
ABSTRACT With the continuous promotion of Industry 4.0, the mass production of composites will be entering Industry 4.0 in the near future. With respect to quality control, nondestructive testing and evaluation (NDT&E) will become nondestructive testing and evaluation (NDE) 4.0 to seamlessly connect with Industry 4.0. Therefore, it is essential to develop innovative NDT&E methods and techniques for NDE 4.0. Although there are many facets of NDE 4.0, intelligent nondestructive testing and evaluation (iNDT&E) can be considered as a technical core of NDE 4.0. Therefore, we propose the development of iNDT&E techniques for composites. In this study, the development processes for NDE 1.0–4.0 are analyzed. The basic connotations of iNDT&E are discussed, and the basic framework and technical elements of iNDT&E are examined. As combined with ultrasonic iNDT&E for composites, the basic progress in iNDT&E techniques is reviewed from the perspectives of ultrasonic equipment, technology and methods, processes, and result evaluations and standards. Future development directions are presented for the iNDT&E techniques in NDE 4.0 for composites.
{"title":"Nondestructive Evaluation 4.0: Ultrasonic Intelligent Nondestructive Testing and Evaluation for Composites","authors":"Songping Liu, Feifei Liu, Yuseng Yang, Legang Li, Zhiying Li","doi":"10.1080/09349847.2020.1826613","DOIUrl":"https://doi.org/10.1080/09349847.2020.1826613","url":null,"abstract":"ABSTRACT With the continuous promotion of Industry 4.0, the mass production of composites will be entering Industry 4.0 in the near future. With respect to quality control, nondestructive testing and evaluation (NDT&E) will become nondestructive testing and evaluation (NDE) 4.0 to seamlessly connect with Industry 4.0. Therefore, it is essential to develop innovative NDT&E methods and techniques for NDE 4.0. Although there are many facets of NDE 4.0, intelligent nondestructive testing and evaluation (iNDT&E) can be considered as a technical core of NDE 4.0. Therefore, we propose the development of iNDT&E techniques for composites. In this study, the development processes for NDE 1.0–4.0 are analyzed. The basic connotations of iNDT&E are discussed, and the basic framework and technical elements of iNDT&E are examined. As combined with ultrasonic iNDT&E for composites, the basic progress in iNDT&E techniques is reviewed from the perspectives of ultrasonic equipment, technology and methods, processes, and result evaluations and standards. Future development directions are presented for the iNDT&E techniques in NDE 4.0 for composites.","PeriodicalId":54493,"journal":{"name":"Research in Nondestructive Evaluation","volume":"59 1","pages":"370 - 388"},"PeriodicalIF":1.4,"publicationDate":"2020-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76956676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-14DOI: 10.1080/09349847.2020.1817641
R. Maev
Dear Reader, This Special Issue of the Research in Nondestructive Evaluation is devoted to the recently introduced term NDE 4.0, which is a natural part of actively ongoing activities during the la...
{"title":"Introduction to RNDE NDE 4.0","authors":"R. Maev","doi":"10.1080/09349847.2020.1817641","DOIUrl":"https://doi.org/10.1080/09349847.2020.1817641","url":null,"abstract":"Dear Reader, This Special Issue of the Research in Nondestructive Evaluation is devoted to the recently introduced term NDE 4.0, which is a natural part of actively ongoing activities during the la...","PeriodicalId":54493,"journal":{"name":"Research in Nondestructive Evaluation","volume":"7 1","pages":"271 - 274"},"PeriodicalIF":1.4,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91141961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-11DOI: 10.1080/09349847.2020.1817640
Kunshan Xu, Ke Yang, Jie Liu, Xiaoping Chen, Yue Wang
ABSTRACT The timely detection of crack defects considerably helps prevent accidents caused by metal component failure. Further, magnetic memory detection technology has the advantage of detecting damage earlier than traditional nondestructive testing technology; however, the relationship between magnetic memory fields and welding cracks needs to be studied. Specimens with buried welding cracks were fabricated to study the magnetic memory field parameters of the propagation process of welding cracks. Variations in the magnetic memory signals of the crack at different loading stages were characterized. The magnetic memory detection method can effectively detect the buried welding crack defects. The magnetic field intensity gradient (dH/dx) demonstrated a regular change with the increase in the applied tensile load (P), which can be considered in two stages: In the first stage (P < 120 kN), dH/dx gradually decreased with P, and in the second stage (P > 120 kN), it rapidly increased before fracture.
{"title":"Investigation of Magnetic Memory Signal of Propagation of Buried Crack under Applied Load","authors":"Kunshan Xu, Ke Yang, Jie Liu, Xiaoping Chen, Yue Wang","doi":"10.1080/09349847.2020.1817640","DOIUrl":"https://doi.org/10.1080/09349847.2020.1817640","url":null,"abstract":"ABSTRACT The timely detection of crack defects considerably helps prevent accidents caused by metal component failure. Further, magnetic memory detection technology has the advantage of detecting damage earlier than traditional nondestructive testing technology; however, the relationship between magnetic memory fields and welding cracks needs to be studied. Specimens with buried welding cracks were fabricated to study the magnetic memory field parameters of the propagation process of welding cracks. Variations in the magnetic memory signals of the crack at different loading stages were characterized. The magnetic memory detection method can effectively detect the buried welding crack defects. The magnetic field intensity gradient (dH/dx) demonstrated a regular change with the increase in the applied tensile load (P), which can be considered in two stages: In the first stage (P < 120 kN), dH/dx gradually decreased with P, and in the second stage (P > 120 kN), it rapidly increased before fracture.","PeriodicalId":54493,"journal":{"name":"Research in Nondestructive Evaluation","volume":"104 1","pages":"1 - 9"},"PeriodicalIF":1.4,"publicationDate":"2020-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73688010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-20DOI: 10.1080/09349847.2020.1807077
Yang Zheng, Zheng-wang Li, Jinjie Zhou, Zong-yang Zhang
ABSTRACT The propagation velocity of a transverse ultrasonic wave is influenced by the temperature of the testing materials. In other words, it directly affects the accuracy of thickness measurement and flaw detection as well as the validity of the focal law during the high-temperature ultrasonic inspection. For the above reasons, an electromagnetic acoustic transducer (EMAT) was adopted in this study to measure the transverse ultrasonic velocities of several metallic specimens when heated to the temperatures of the order of 700°C. EMAT was particularly favored for use in this study owing to its non-contact and couplant-free characteristics. The reliability of the collected data and experimental stability were verified via the establishment of a high-temperature experimental system as well as analysis of the measurement error and uncertainty. By comparing ferromagnetic and non-ferromagnetic materials using this system, it can be found that the transverse ultrasonic velocity of ferromagnetic materials decreases in a nonlinear “step-like” manner with the temperature. Therefore, results obtained from this study indicates that the velocity–temperature relationship of different materials does not follow the same law. Besides, the curves tested in this study can serve as a ready references to facilitate nondestructive inspections of materials at high temperatures.
{"title":"Study on the Change Law of Transverse Ultrasonic Velocity in a High Temperature Material","authors":"Yang Zheng, Zheng-wang Li, Jinjie Zhou, Zong-yang Zhang","doi":"10.1080/09349847.2020.1807077","DOIUrl":"https://doi.org/10.1080/09349847.2020.1807077","url":null,"abstract":"ABSTRACT The propagation velocity of a transverse ultrasonic wave is influenced by the temperature of the testing materials. In other words, it directly affects the accuracy of thickness measurement and flaw detection as well as the validity of the focal law during the high-temperature ultrasonic inspection. For the above reasons, an electromagnetic acoustic transducer (EMAT) was adopted in this study to measure the transverse ultrasonic velocities of several metallic specimens when heated to the temperatures of the order of 700°C. EMAT was particularly favored for use in this study owing to its non-contact and couplant-free characteristics. The reliability of the collected data and experimental stability were verified via the establishment of a high-temperature experimental system as well as analysis of the measurement error and uncertainty. By comparing ferromagnetic and non-ferromagnetic materials using this system, it can be found that the transverse ultrasonic velocity of ferromagnetic materials decreases in a nonlinear “step-like” manner with the temperature. Therefore, results obtained from this study indicates that the velocity–temperature relationship of different materials does not follow the same law. Besides, the curves tested in this study can serve as a ready references to facilitate nondestructive inspections of materials at high temperatures.","PeriodicalId":54493,"journal":{"name":"Research in Nondestructive Evaluation","volume":"5 1","pages":"38 - 57"},"PeriodicalIF":1.4,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89681376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-03DOI: 10.1080/09349847.2020.1797255
Jun Chen, Chenglong Yang, Qingdong Wang, N. Xu, Taotao Zhang
ABSTRACT In this work, the second harmonic generation (SHG) technique based on embedded piezoelectric (PZT) sensors is developed for the defect assessment of concrete samples. Three different imperfection forms of concrete including internal capillary void during the curing process, cracking damage due to compression, and bending loads are examined and analyzed. Clear second harmonics are observed by Fourier transform of time domain signal, and the square of fundamental signal amplitude shows a linear relation with the second harmonic amplitude as theoretically expected. The nonlinear parameter presents a good distinction for samples in different states of three cases, indicating the well-round feasibility of SHG technique based on embedded sensors. In addition, the nonlinear parameter presents an excellent correlation with the variation of internal capillary void and cracks in concrete. The high sensitivity of the developed SHG technique is further validated through a comparison between the nonlinear parameter and two traditional linear parameters, namely the phase velocity of Rayleigh wave and the resonance frequency of vibrations. Experimental results in this study demonstrate that the embedded sensors are promising for the nonlinear ultrasonic nondestructive evaluation of concrete structures, particularly as a low-cost alternative of commercial ultrasonic transducers.
{"title":"Nonlinear Ultrasonic Second Harmonic Assessment of Concrete Defects Based on Embedded Piezoelectric Sensors","authors":"Jun Chen, Chenglong Yang, Qingdong Wang, N. Xu, Taotao Zhang","doi":"10.1080/09349847.2020.1797255","DOIUrl":"https://doi.org/10.1080/09349847.2020.1797255","url":null,"abstract":"ABSTRACT In this work, the second harmonic generation (SHG) technique based on embedded piezoelectric (PZT) sensors is developed for the defect assessment of concrete samples. Three different imperfection forms of concrete including internal capillary void during the curing process, cracking damage due to compression, and bending loads are examined and analyzed. Clear second harmonics are observed by Fourier transform of time domain signal, and the square of fundamental signal amplitude shows a linear relation with the second harmonic amplitude as theoretically expected. The nonlinear parameter presents a good distinction for samples in different states of three cases, indicating the well-round feasibility of SHG technique based on embedded sensors. In addition, the nonlinear parameter presents an excellent correlation with the variation of internal capillary void and cracks in concrete. The high sensitivity of the developed SHG technique is further validated through a comparison between the nonlinear parameter and two traditional linear parameters, namely the phase velocity of Rayleigh wave and the resonance frequency of vibrations. Experimental results in this study demonstrate that the embedded sensors are promising for the nonlinear ultrasonic nondestructive evaluation of concrete structures, particularly as a low-cost alternative of commercial ultrasonic transducers.","PeriodicalId":54493,"journal":{"name":"Research in Nondestructive Evaluation","volume":"166 1","pages":"254 - 270"},"PeriodicalIF":1.4,"publicationDate":"2020-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89054718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-03DOI: 10.1080/09349847.2020.1795329
K. Stoev, T. Sawadogo
ABSTRACT Currently, the primary method employed by ultrasound inspection systems is based on applying pulsed sound/ultrasound energy to the inspected part, and detecting reflected/transmitted pulses. Typically, pulse-based methods are essentially time-domain back-reflection methods, and time-of-flight is the main measured parameter. Recently, continuous-wave frequency-domain back-reflection meters were developed in the radar and in the fiber optics fields, which demonstrate significantly better spatial resolution, higher SNR, and ability to detect reflecting objects at very short distances. The same approach was used in this paper to develop a prototype continuous-wave ultrasound inspection system. The parameters of the prototype system are described, and the advantages and limitations of the continuous-wave ultrasound inspection method are discussed. Examples of the use of the system are presented.
{"title":"Nondestructive Testing by Frequency-Domain Continuous-Wave Ultrasound Reflectometry","authors":"K. Stoev, T. Sawadogo","doi":"10.1080/09349847.2020.1795329","DOIUrl":"https://doi.org/10.1080/09349847.2020.1795329","url":null,"abstract":"ABSTRACT Currently, the primary method employed by ultrasound inspection systems is based on applying pulsed sound/ultrasound energy to the inspected part, and detecting reflected/transmitted pulses. Typically, pulse-based methods are essentially time-domain back-reflection methods, and time-of-flight is the main measured parameter. Recently, continuous-wave frequency-domain back-reflection meters were developed in the radar and in the fiber optics fields, which demonstrate significantly better spatial resolution, higher SNR, and ability to detect reflecting objects at very short distances. The same approach was used in this paper to develop a prototype continuous-wave ultrasound inspection system. The parameters of the prototype system are described, and the advantages and limitations of the continuous-wave ultrasound inspection method are discussed. Examples of the use of the system are presented.","PeriodicalId":54493,"journal":{"name":"Research in Nondestructive Evaluation","volume":"63 1","pages":"236 - 253"},"PeriodicalIF":1.4,"publicationDate":"2020-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74138093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-03DOI: 10.1080/09349847.2019.1672842
Xiongbing Li, Nan Sun, Yongfeng Song, Shuzeng Zhang
ABSTRACT To accurately size small crack-like flaws in components with non-ideal surface conditions, such as curvature, roughness, and coating, we developed a flaw sizing method based on an ultrasonic measurement model. First, the effects of surface curvature on the sound beam profile, as well as the effects of surface coating and roughness on the wave energy are investigated theoretically and experimentally. Then, correction methods for curvature, roughness, and coating are introduced into the ultrasonic measurement model, and the flaw response in components with different surface conditions is predicted. Lastly, by accounting for the effects of surface conditions, a set of model-based flaw sizing curves is generated for predicting the equivalent size of crack-like flaws. These model-based curves can guide the setting of system parameters and improve the flaw sizing accuracy. Experiments are then conducted to verify the effectiveness of the proposed method. This work demonstrates the utility of the ultrasonic method for measuring the equivalent flaw size in practical applications.
{"title":"Sizing Small Crack-like Flaws through Non-ideal Part Surface Using Ultrasonic Measurement Model","authors":"Xiongbing Li, Nan Sun, Yongfeng Song, Shuzeng Zhang","doi":"10.1080/09349847.2019.1672842","DOIUrl":"https://doi.org/10.1080/09349847.2019.1672842","url":null,"abstract":"ABSTRACT To accurately size small crack-like flaws in components with non-ideal surface conditions, such as curvature, roughness, and coating, we developed a flaw sizing method based on an ultrasonic measurement model. First, the effects of surface curvature on the sound beam profile, as well as the effects of surface coating and roughness on the wave energy are investigated theoretically and experimentally. Then, correction methods for curvature, roughness, and coating are introduced into the ultrasonic measurement model, and the flaw response in components with different surface conditions is predicted. Lastly, by accounting for the effects of surface conditions, a set of model-based flaw sizing curves is generated for predicting the equivalent size of crack-like flaws. These model-based curves can guide the setting of system parameters and improve the flaw sizing accuracy. Experiments are then conducted to verify the effectiveness of the proposed method. This work demonstrates the utility of the ultrasonic method for measuring the equivalent flaw size in practical applications.","PeriodicalId":54493,"journal":{"name":"Research in Nondestructive Evaluation","volume":"48 2 1","pages":"147 - 163"},"PeriodicalIF":1.4,"publicationDate":"2020-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88075175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-03DOI: 10.1080/09349847.2019.1645254
N. Benhadda, D. Hachi, B. Helifa, I. Lefkaier, B. Abdelhadi
ABSTRACT This article presents a study of a Multi-coils circular eddy current non-destructive testing sensor for determining the fibers orientation as well as the detection of defect in multidirectional carbon fibers reinforced polymer (CFRP). The developed sensor contains 16 rectangular coils connected in series and supplied by a single-phase sinusoidal source. This sensor allows the annulations of the mechanical rotation of the conventional sensors and it permits to reduce the inspection procedure duration. The electromagnetic phenomena are calculated by using 3D finite element method (FEM) based on the electromagnetic AV-A formulation. Finally, the Multi-coils circular sensor responses are analyzed through polar diagrams of the impedance variation, where the defect is taken into consideration. A great concordance between the obtained results and those of literatures has been noticed. The provided results show that the proposed sensor allows an efficient characterization of multidirectional CFRP and detection of defects in different layers.
{"title":"Development of Multi-Coils Circular Eddy Current Sensor for Characterization of Fibers Orientation and Defect Detection in Multidirectional CFRP Material","authors":"N. Benhadda, D. Hachi, B. Helifa, I. Lefkaier, B. Abdelhadi","doi":"10.1080/09349847.2019.1645254","DOIUrl":"https://doi.org/10.1080/09349847.2019.1645254","url":null,"abstract":"ABSTRACT This article presents a study of a Multi-coils circular eddy current non-destructive testing sensor for determining the fibers orientation as well as the detection of defect in multidirectional carbon fibers reinforced polymer (CFRP). The developed sensor contains 16 rectangular coils connected in series and supplied by a single-phase sinusoidal source. This sensor allows the annulations of the mechanical rotation of the conventional sensors and it permits to reduce the inspection procedure duration. The electromagnetic phenomena are calculated by using 3D finite element method (FEM) based on the electromagnetic AV-A formulation. Finally, the Multi-coils circular sensor responses are analyzed through polar diagrams of the impedance variation, where the defect is taken into consideration. A great concordance between the obtained results and those of literatures has been noticed. The provided results show that the proposed sensor allows an efficient characterization of multidirectional CFRP and detection of defects in different layers.","PeriodicalId":54493,"journal":{"name":"Research in Nondestructive Evaluation","volume":"6 1","pages":"133 - 146"},"PeriodicalIF":1.4,"publicationDate":"2020-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89013896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-05-03DOI: 10.1080/09349847.2019.1673857
S. Sarkar, P. Wahi, P. Munshi
ABSTRACT Limited data CT Image reconstruction is a real-life problem. A Total Variation (TV) l1 norm minimization technique has been examined and validated here to reconstruct CT images from limited data incorporating a limited number of views along with limited angular span, a situation typical in engineering applications. The Lagrangian technique has been used to solve TV equations. The reconstructed CT image has been compared with the images reconstructed by SIRT, Higher Order TV (HOTV) technique, l2 norm minimization based technique and some other techniques with the help of various image quality index (IQI) parameters. The comparison shows that the proposed scheme is an attractive solution for limited data CT Image reconstruction from industrial and engineering perspective. The application of Sobolev space error analysis has also been given to ensure good global reconstruction.
{"title":"Total Variation (TV) l1 Norm Minimization Based Limited Data X-ray CT Image Reconstruction","authors":"S. Sarkar, P. Wahi, P. Munshi","doi":"10.1080/09349847.2019.1673857","DOIUrl":"https://doi.org/10.1080/09349847.2019.1673857","url":null,"abstract":"ABSTRACT Limited data CT Image reconstruction is a real-life problem. A Total Variation (TV) l1 norm minimization technique has been examined and validated here to reconstruct CT images from limited data incorporating a limited number of views along with limited angular span, a situation typical in engineering applications. The Lagrangian technique has been used to solve TV equations. The reconstructed CT image has been compared with the images reconstructed by SIRT, Higher Order TV (HOTV) technique, l2 norm minimization based technique and some other techniques with the help of various image quality index (IQI) parameters. The comparison shows that the proposed scheme is an attractive solution for limited data CT Image reconstruction from industrial and engineering perspective. The application of Sobolev space error analysis has also been given to ensure good global reconstruction.","PeriodicalId":54493,"journal":{"name":"Research in Nondestructive Evaluation","volume":"1 1","pages":"164 - 186"},"PeriodicalIF":1.4,"publicationDate":"2020-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79911376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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