Статті в журналах: "Devices of non-destructive testing"

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Petryk, V. F., A. G. Protasov, R. M. Galagan, A. V. Muraviov, and I. I. Lysenko. "Smartphone-Based Automated Non-Destructive Testing Devices." Devices and Methods of Measurements 11, no. 4 (December 17, 2020): 272–78. http://dx.doi.org/10.21122/2220-9506-2020-11-4-272-278.

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Currently, non-destructive testing is an interdisciplinary field of science and technology that serves to ensure the safe functioning of complex technical systems in the face of multifactorial risks. In this regard, there is a need to consider new information technologies based on intellectual perception, recognition technology, and general network integration. The purpose of this work was to develop an ultrasonic flaw detector, which uses a smartphone to process the test results, as well as transfer them directly to an powerful information processing center, or to a cloud storage to share operational information with specialists from anywhere in the world.The proposed flaw detector consists of a sensor unit and a smartphone. The exchange of information between the sensor and the smartphone takes place using wireless networks that use "bluetooth" technology. To ensure the operation of the smartphone in the ultrasonic flaw detector mode, the smartphone has software installed that runs in the Android operating system and implements the proposed algorithm of the device, and can serve as a repeater for processing data over a considerable distance (up to hundreds and thousands of kilometers) if it necessary.The experimental data comparative analysis of the developed device with the Einstein-II flaw detector from Modsonic (India) and the TS-2028H+ flaw detector from Tru-Test (New Zealand) showed that the proposed device is not inferior to them in terms of such characteristics as the range of measured thicknesses, the relative error in determining the depth defect and the object thickness. When measuring small thicknesses from 5 to 10 mm, the proposed device even surpasses them, providing a relative measurement error of the order of 1 %, while analogues give this error within 2–3 %.

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Beneš, Oldřich, and David Hampel. "Rationale for Replacement of the Destructive Test by Non-Destructive One in Medical Devices Manufacturing." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 68, no. 6 (2020): 967–72. http://dx.doi.org/10.11118/actaun202068060967.

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Due to expanding demand for the level of testing on one side and reduction of costs on the other side, the question how to replace expensive destructive testing of medical devices without compromising the quality of final product arising urgently. This situation is common within all highly regulated industries – in this article is addressed the problem from medical device manufacturing industry. Based on real data containing testing and validation datasets, logit model and classification tree model are estimated for establishing the relationship between result of destructive test and measurements of explored device. Results point to possibility of replacing destructive test by non-destructive one in our case.

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Coultate, A. K. "Non-destructive magnetic testing device." NDT & E International 24, no. 6 (December 1991): 325. http://dx.doi.org/10.1016/0963-8695(91)90069-f.

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Yarmolik, V. N., I. Mrozek, V. A. Levantsevich, and D. V. Demenkovets. "Transparent memory testing based on dual address sequences." Doklady BGUIR 19, no. 4 (July 1, 2021): 43–51. http://dx.doi.org/10.35596/1729-7648-2021-19-4-43-51.

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An effectiveness of the application of classical non-destructive tests for testing storage devices and their main disadvantages, among which there are great time complexity and low diagnostic ability, are analysed. The concept of double address sequence 2A is defined and the examples of their formation based on counter address sequences and Gray code are provided. The basic element of non-destructive tests with the use of double address sequences is synthesized and its detecting and diagnostic abilities for different storage devices defects are explored. There are two new non-destructive tests of memory devices March_2A_1 and March_2A_2 and an estimation of their time complexity and efficiency of failure detection are given. A significantly lower time complexity of the proposed tests and their high diagnostic ability in comparison with classical non-destructive tests are shown.

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Ozdiev, Ali, Yury Kryuchkov, and Hans-Michael Kroning. "Non-destructive X-Ray testing of complex mechanisms and devices." MATEC Web of Conferences 102 (2017): 01029. http://dx.doi.org/10.1051/matecconf/201710201029.

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Zezulová, Eva, and Tereza Komárková. "Techniques of Non-Destructive Testing of Steel Fiber Reinforced Concrete." Key Engineering Materials 755 (September 2017): 153–58. http://dx.doi.org/10.4028/www.scientific.net/kem.755.153.

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Non-destructive testing (NDT) is seeing increasingly frequent use in civil engineering thanks to the fact that the tests are repeatable and do not cause serious damage to the material. The requirements for the development and modernization of available testing devices and methodologies are ever increasing and the testing of existing structures often requires the use of NDT. Unfortunately, every measurement and methodology has its limits and the measurement devices for the evaluation of steel fiber reinforced concrete (SFRC) are no exception. In recent decades there has been an effort to modernize and develop existing measurement devices for SFRC testing. This building material is commonly used especially in large-scale structures. Nevertheless, the technology of SFRC could seem complicated when compared with ordinary concrete and the very nature of this composite material could lead to SFRC inhomogeneity during construction. This paper describes the assessment of SFRC by more or less available methodologies and measurements utilizing non-destructive principles.

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Tao, Yu Heng, Anthony J. Fitzgerald, and Vincent P. Wallace. "Non-Contact, Non-Destructive Testing in Various Industrial Sectors with Terahertz Technology." Sensors 20, no. 3 (January 28, 2020): 712. http://dx.doi.org/10.3390/s20030712.

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In this article, we survey various non-contact, non-destructive testing methods by way of terahertz (THz) spectroscopy and imaging designed for use in various industrial sectors. A brief overview of the working principles of THz spectroscopy and imaging is provided, followed by a survey of selected applications from three industries—the building and construction industry, the energy and power industry, and the manufacturing industry. Material characterization, thickness measurement, and defect/corrosion assessment are demonstrated through the examples presented. The article concludes with a discussion of novel spectroscopy and imaging devices and techniques that are expected to accelerate industry adoption of THz systems.

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Fan, Jin Wei, Yi Jia Liu, Ling Chen, Shi Ji, and Shuai Yuan. "A Kind of Multi-Functional Wall Surface Nondestructive Testing Device." Applied Mechanics and Materials 716-717 (December 2014): 958–60. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.958.

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In this paper, non-destructive testing on the inner wall surface of the deep, invented a detection device, the device by numerical control systems, mechanical control devices and imaging device components. PC lower machine controlled by CNC system mechanical devices IPC and PLC can control the composition includes a manual lift the car up and down movement, control multistage axial movement of the cylinder and the axial rotation of the servo motor control to meet the imaging device the location requirements. Imaging device consists of a high-speed industrial cameras and miniature camera components. The device has a low cost, high accuracy, simple manufacturing process and so on.

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Chatzifotis, Panagiotis I. "Non-Destructive Testing with Ultrasound in Rails and Ship Plates." Key Engineering Materials 605 (April 2014): 613–16. http://dx.doi.org/10.4028/www.scientific.net/kem.605.613.

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This paper deals with finding of defects, such as cracks, breakdowns and inclusions in rails and in ship plates, by ultrasound technique. Pulse echo method and twin beams technique is some of the ultrasonic inspection methods we have used for thickness measurements and for inspection of the welds. Initially, the thickness of rails and ship plates was measured by ultrasound devices using straight beam transducers and then the weldings of these samples were checked by using angle beam transducers.

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Kraler, Anton, and Wilfried Beikircher. "Non-Destructive and Semi-Destructive Test Methods for Strength Determination of Aged Wood." Advanced Materials Research 778 (September 2013): 385–92. http://dx.doi.org/10.4028/www.scientific.net/amr.778.385.

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To what extent is there a change in the strength of wood over the course of centuries, when installed under a constant load? Are there non-destructive measurement methods for the determination of strength that are suitable for this investigation? These two questions were the starting point of this research project. Through experience we have learned that the strength of wood is dependent on the growth regions and climatic conditions in which it originates. For example, over centuries, in a northern Italian valley, there were commonly known and clearly defined areas which provided the wood for the construction of the local buildings. Another decisive factor for selecting this research region was that the buildings concerned had already been dated by means of dendrochronology. This created a unique situation in that the strength of the timber in these buildings, which cover about nine centuries (1250 to present), could be compared and analyzed. Local spruce and larch used in the construction typical of this region were selected for the investigations. Starting with 1250AD (the oldest dated wood construction) and in consecutive steps of 100 years, two projects (of the entire 18 projects) are selected and explored. Three non-destructive and respectively semi-destructive measurement methods were used for the strength testing. The measurement devices are: for drill resistance measuring IML-RESI F400S, for the fractometer tests (bending and compression tests) IML-Instrumenta Mechanik Labor Gmbh. For ultrasonic testing the device Sylvatest duo is used. So the validity of the measurement systems used could be brought into relation with the actual strength. Some small, flawless samples (without knots) from selected projects were removed and then tested in a laboratory with the universal testing machine Shimadzu 100KN.

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Bekher, Sergei, and Andrei Kolomeets. "Automation of control processes in the non-destructive testing units." MATEC Web of Conferences 239 (2018): 01025. http://dx.doi.org/10.1051/matecconf/201823901025.

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The problems of automation of control processes in the non-destructive testing units are considered. The analysis of normative and technical documents is carried out and the main components of the non-destructive testing system and their parameters are determined. The developed software and relational database for monitoring and control of the unit have been integrated into trial operation in the non-destructive control units of the freight car repair company. Based on the statistical processing of control results, the possibility of assessing the efficiency of NDT inspectors and control devices was shown. The use of a network database and developed software makes it possible to improve the efficiency of control processes in the units of non-destructive testing by reducing the time spent on analysis and deciding on scheduled activities, the formation of reporting documentation.

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Matveev, V. I., and P. E. Kleyzer. "EQUIPMENT AND DEVICES AT THE EXHIBITIONS "TESTING & CONTROL" AND "NDT RUSSIA – 2019"." Kontrol'. Diagnostika, no. 259 (2020): 50–59. http://dx.doi.org/10.14489/td.2020.01.pp.050-059.

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A brief information review of the 16th International Exhibition of Testing and Measuring Equipment «Testing & Control» and the 19th International Exhibition of Non-Destructive Testing Equipment «NDT Russia» which took place from October 22 – 24, 2019 at the Crocus Expo IEC in Moscow is presented. Russian and foreign manufacturers and suppliers demonstrated a wide range of equipment in the following areas: testing equipment, measuring and metrological equipment, equipment for production control, machine vision, equipment for non-destructive testing and technical diagnostics, equipment for laboratory control, diagnostic and monitoring systems. The All-Russian Scientific Conference “Measurements. Tests Control” was held simultaneously with the exhibitions. It was devoted to methods, tools, metrological support of research, testing and operation of products in various industries.

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Ullmann, Ingrid, Julian Adametz, Daniel Oppelt, Andreas Benedikter, and Martin Vossiek. "Non-destructive testing of arbitrarily shaped refractive objects with millimetre-wave synthetic aperture radar imaging." Journal of Sensors and Sensor Systems 7, no. 1 (April 20, 2018): 309–17. http://dx.doi.org/10.5194/jsss-7-309-2018.

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Abstract. Millimetre-wave (mmW) imaging is an emerging technique for non-destructive testing. Since many polymers are transparent in this frequency range, mmW imaging is an attractive means in the testing of polymer devices, and images of relatively high resolution are possible. This contribution presents an algorithm for the precise imaging of arbitrarily shaped dielectric objects. The reconstruction algorithm is capable of automatically detecting the object's contour, followed by a material-sensitive reconstruction of the object's interior. As an example we examined a polyethylene device with simulated material defects, which could be depicted precisely.

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Cherepanov, Anatoliy. "EVALUATION OF NONDESTRUCTIVE TESTING RESULTS." Scientific Papers Collection of the Angarsk State Technical University 2021, no. 1 (July 5, 2021): 67–76. http://dx.doi.org/10.36629/2686-7788-2021-1-1-67-76.

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The issues of assessing the volume and efficiency of non–destructive testing in order to improve the quality and completeness of information for determining the degradation processes that cause the destruction of technical devices, for automating data processing, for determining time, labor and cost, taking into account the volume, efficiency and labor intensity.

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Higuera, María, José M. Perales, María-Luisa Rapún, and José M. Vega. "Non-Invasive Testing of Physical Systems Using Topological Sensitivity." Applied Sciences 11, no. 3 (February 2, 2021): 1341. http://dx.doi.org/10.3390/app11031341.

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A review of available results on non-destructive testing of physical systems, using the concept of topological sensitivity, is presented. This mathematical tool estimates the sensitivity of a set of measurements in some given sensors, distributed along the system, to defects/flaws that produce a degradation of the system. Such degradation manifests itself on the properties of the system. The good performance of this general purpose post-processing method is reviewed and illustrated in some applications involving non-destructive testing. These applications include structural health monitoring, considering both elastodynamic ultrasonic guided Lamb waves and active infrared thermography. Related methods can also be used in other fields, such as diagnosis/prognosis of engineering devices, which is also considered.

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ZUBANOV, S. V., and E. V. TKAChEV. "DETERMINATION OF THE STRENGTH OF A SILICATE BRICK AND MASONRY, BY METHODS OF NON-DESTRUCTIVE CONTROL." Urban construction and architecture 3, no. 3 (September 15, 2013): 90–96. http://dx.doi.org/10.17673/vestnik.2013.03.18.

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There are represented results of determining the strength of a silicate brick and masonry with consideration of various factors by devices of non-destructive control. There are given results of experimental investigations of a silicate brick and masonry by ultrasonic testing devices of surface and through-wall control.

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Велев, Борис, Иван Иванов та Владимир Каменов. "Автоматизированная система комплексного неразрушающего контроля структуры и механических свойств материалов машиностроения". Дефектоскопия 3 (березень 2021): 17–25. http://dx.doi.org/10.31857/s0130308221030027.

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An automated system with two optimized modular devices is presented — MULTITEST-MC010 for research of ferromagnetic materials with the methods for measuring magnetic noise and magneto acoustic emission of Barkhausen and MULTITEST — CD010 for research of mechanical engineering materials with the methods of velocity measurement of longitudinal waves C and attenuation coefficient δof ultrasound. The main approaches and principles for the automated data processing of complex non-destructive testing are presented, as well as the setup of the modular devices of the automated system. For approbation of the system the influence of the heat treatment (hardness) in structural steel 40X on the non-destructive information parameters of the magnetic noise and the magneto acoustic emission — magnetic noise voltage EBN and voltage of the magneto acoustic emission EMAE was studied. The mechanical properties in foundry cast iron samples with complex measurement of the information parameters , C, by simultaneous use of the two modular devices of the system were also studied. The possibility for the complex application of these parameters for non-destructive testing of the mechanical properties after heat treatment in structural steel 40X and the tensile strength in cast iron specimens has been proven.

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Karla, Hornbostel, Tobias Danner, and Mette Rica Geiker. "Non-destructive Test Methods for Corrosion Detection in Reinforced Concrete Structures." Nordic Concrete Research 62, no. 1 (June 1, 2020): 41–61. http://dx.doi.org/10.2478/ncr-2019-0005.

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AbstractSeveral inspection methods can be used to assess the corrosion state of steel reinforcement in concrete. Especially for periodical field surveys and monitoring, non-destructive testing (NDT) methods are to be preferred as they do not cause any or very limited damage to the existing concrete. In this paper, the corrosion state of three reinforced concrete beams exposed to marine environment for 25 years was evaluated by measuring three parameters; electrochemical potential, concrete resistivity and corrosion rate. The measurements were performed with commercial devices. It was found that all devices are applicable for field inspections. Among the methods selected for the study, the electrochemical potential measured in a fine grid and analysed statistically offered the best possibility of evaluating the corrosion state; preferably in combination with selected excavations for determination of the level of corrosion.

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KOLOKHOV, V. V., L. V. MOROZ, V. L. МОМОТ, V. V. BYLIK, and S. M. BOHDAN. "UNFORMALIZED ASPECTS OF APPLICATION THE NON-DESTRUCTIVE METHODS FOR DETERMINATION OF CONCRETE QUALITY ON ROAD CONCRETE COATINGS." Ukrainian Journal of Civil Engineering and Architecture, no. 4 (November 21, 2021): 36–45. http://dx.doi.org/10.30838/j.bpsacea.2312.310821.36.788.

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Formulation the problem. Experience with the use of non-destructive testing devices shows that theadjustment of calibration dependences in the conditions of damaged concrete surfaces is difficult. Usually quantitativeanalysis is replaced by qualitative, and methods that allow you to return to the quantitative assessment are notstandardized. That is, the adequacy of property definitions needs to be increased. The purpose of the study is todetermine the possibilities of increasing the adequacy in the using of non-destructive testing devices and to study theinfluence of the peculiarities of the technology of manufacturing concrete pavements on the measurement results.Results: It has been performed a visual inspection of the condition of the coating structure on the basis of currentregulations. The study was performed using an ultrasonic device "Novotest IPSM-U" and a device "Onyx 2.5" (shockpulse method). Measurements were performed both on the surface of the concrete pavement and on the samples takenfrom the structure. During the work, project materials and passports for the concrete mixture were used. Conclusions.Studies have shown that: to obtain evidence-based results in the application of non-destructive methods for determiningthe quality of concrete road pavements, existing methods need to be improved and formalized; it needs to be clarifiedand formalized the methods of providing acoustic contact of receivers − transmitters of ultrasonic vibrations with theconcrete surface and the conditions of interaction the indentors with the concrete surface during the implementation ofthe method of elastic rebound; it is necessary to develop and standartize a method for determining the properties of theconcrete mixture based on the properties of concrete.

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Deyneka, R., M. Tykhan, and O. Markina. "Non-destructive testing of ferromagnetic materials using hand inductive sensor." Archives of Materials Science and Engineering 1, no. 98 (July 1, 2019): 32–41. http://dx.doi.org/10.5604/01.3001.0013.3392.

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Purpose: The need for reliability of industrial structures, machines and other equipment requires more accurate testing of structural materials, especially ferromagnetic materials. Therefore, it is important to improve existing or develop new, more accurate methods and devices for non-destructive testing. Design/methodology/approach: Non-destructive testing of ferromagnetic materials is carried out by surveying a local magnetic field or determining the section magnetic resistance of a material using the proposed new type of sensor as the hand inductive element on a toroidal core with additional magnetic cores. Findings: This sensor has a simple design and high response characteristic, which has been confirmed experimentally. Such a sensor can be used for testing welded joints by the proposed method, which is based on measuring the magnetic resistance of the welding area. Research limitations/implications: Analytical physical processes research that occurred in the magnetic core material of the sensor coil core, used as a sensitive element, is complicated by the nonlinearity of the magnetization curve of the material of the core of the sensitive element and the lack of a single analytical relationship to fully describe the magnetization process of ferromagnetic materials of inductive elements. Therefore, each copy of the sensor will be an individual graduation. Practical implications: The proposed version of the hand inductive sensor allows to perform non-destructive testing during the operation of ferromagnetic structures and without special requirements to external conditions with low costs and the possibility of computer processing of data. Originality/value: The use of the nonlinearity zone of the magnetization curve of the inductive element core material made it possible to obtain a variant of a magnetic sensor that is close in sensitivity to fluxgate and, at the same time, is much simpler in design using non-deficient materials. The use of a ferrite core with low saturation induction requires a small circuit supply voltage, but a generator power reserve. The proposed hand inductive sensor is sensitive to the presence of extraneous ferromagnetic objects, and responds only to a magnetic field. The high magnetic resistance of the inductive sensor allows it to be used on uneven and dirty surfaces. High sensitivity allows to detect small deviations of the magnetic fields of dispersion of a welded joint with their comparison along the entire joint length. All of this gave new opportunities for more accurate non-destructive testing of structural elements and materials.

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Stefan, Maack, Villalobos Salvador, and Scott David. "Validation of artificial defects for Non-destructive testing measurements on a reference structure." MATEC Web of Conferences 199 (2018): 06006. http://dx.doi.org/10.1051/matecconf/201819906006.

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Non-destructive testing was established over the last decades as an important tool for assessing damages, material characterization and quality assurance in civil engineering. For example, Ground Penetrating Radar (GPR) can be used to scan large areas of concrete structures to determine the spatial position of the reinforcement. With the ultrasonic echo method, the thickness of concrete structures can be easily determined even if a high density of reinforcement is given. Various methods and processes have been developed for the validation of NDT procedures aiming at ensuring the quality of measurements in practical use. The Probability of Detection (POD) for example, is an available method to compare different technical devices with each other quantitatively regarding their performance. With this method, the best suited testing device for a specific inspection task under defined boundary conditions can be selected. By using the Guide to the Expression of Uncertainty in Measurement (GUM), it is possible to quantify the measurement uncertainty of an inspection procedure for a specific task. Another important aspect to improve the acceptance of Non-destructive testing methods is the development of reference specimens. Reference specimens serve for the calibration and further development of NDT methods under realistic conditions in different laboratories under the same conditions. A particular challenge here is the most realistic representation of a damage that can occur at building sites. Possible damages include for example horizontal and vertical cracks or honeycombs in concrete. Such a reference structure was built for the development of a new design of power plant constructions. Comparative studies on the manufacturing of realistic honeycombs and delaminations were carried out in advance on a test specimen. The results of this study are presented here.

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Becker, Karl-Friedrich, Mathias Minkus, Jeremias Pauls, Volker Bader, Steve Voges, Tanja Braun, Gerd Jungmann, Hubert Wieser, M. Schneider-Ramelow, and K. D. Lang. "Non-Destructive Testing for System-in-Package Integrity Analysis." International Symposium on Microelectronics 2017, no. 1 (October 1, 2017): 000182–87. http://dx.doi.org/10.4071/isom-2017-wa15_077.

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Abstract The constant drive of microelectronics towards ever higher degrees of integration leads to a wide variety of concepts to yield smallest packages with maximized functionality – while side by side packaging leads to thinnest packages a small footprint can typically only be achieved by using component stacking approaches. This leads to truly heterogeneous packages where a variety of materials are forming a complex potpourri of building blocks with different thermo-mechanical properties. While building such an integrated package needs high precision material dosing, component placement and fine pitch wire bonding and is already challenging – the non-destructive analysis of such packages for process and reliability characterization is even trickier. Additionally this NDT approach can not only be applied to determine the initial device quality but also during accelerated ageing tests as a tool for intermediate testing to determine the effects of chip-package interaction. At Fraunhofer IZM a methodology has been applied to analyze a molded package using state of the art NDT equipment. A high resolution x-ray CT system by GE and a Gen6 CSAM system have been used as complimentary means to gain insight into a reference package that contains a four die stack assembled on PCB and is overmolded by a standard transfer molding process. To facilitate setting up the analysis procedure a variety of artefacts have been introduced to the package allowing the exact localization of layers and can be used to optimize the parameters for ultrasonic analysis for the variety of transducers used for package analysis. Additionally a simulation software is used to calculate the resulting ultrasound echoes for the different intra-package layers and the applicability of this tool for setting up an analysis procedure is provided. As a result the paper describes an analysis methodology for highly integrated packages that uses CSAM analysis and x-ray CT for device analysis, while cross sectioning is used to confirm these results. Ultrasound simulation is applied to explain the findings of analysis process setup and will be evaluated on its potential to transfer the analysis method to SiP packages with varying geometry.

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Efimov, A. G. "Electromagnetic and magnetic methods of non-destructive testing for control of damage accumulation in structural steels and alloys (review)." Industrial laboratory. Diagnostics of materials 86, no. 8 (August 14, 2020): 49–57. http://dx.doi.org/10.26896/1028-6861-2020-86-8-49-57.

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Control of the stress-strain state, compressive and tension stresses, accumulated fatigue damage is one of the goals of non-destructive testing. We consider data of current research in the field of eddy current and electromagnetic methods of non-destructive testing aimed at solving the problem of monitoring the accumulated damage in structural steels and alloys. Developments for practical implementation of the coercive force method, the eddy current structurescopy of non-magnetic materials, the method of higher harmonics and remanence-based control, the method of magnetic noise (Barkhausen noise) are considered. The physical foundations of non-destructive testing methods are considered along with their brief comparative analysis. Examples of non-destructive testing of critical units, such as operating oil and gas pipelines, aircraft parts, bearing parts, pressure vessels, crane parts, etc. are given. The possibility of using the eddy current method for control of the austenitic phase of cold rolled austenitic steels (AISI 304, AISI 321, AISI 316) is analyzed. The examples of static and fatigue tests of the samples of various steels and alloys are given: St3, St20, St45, D16T, AMg6, AMg6N, 12Kh18N9T, 08Kh18N9, 40Kh, R91. Metrology issues and the impact of interfering parameters affecting the measurement error are considered. The equipment used for a number of methods is discussed. Conclusions regarding the limits of applicability and limitations of the considered methods are drawn. The review provides links to both the fundamental works in the field of electromagnetic structurescopy and to modern research in this area which is important for the practical implementation of the devices based on electromagnetic and magnetic methods of non-destructive testing.

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Dolapchiev, Ivaylo, Kostadin Brandisky, and Petar Ivanov. "Eddy current testing probe optimization using a parallel genetic algorithm." Serbian Journal of Electrical Engineering 5, no. 1 (2008): 39–48. http://dx.doi.org/10.2298/sjee0801039d.

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This paper uses the developed parallel version of Michalewicz's Genocop III Genetic Algorithm (GA) searching technique to optimize the coil geometry of an eddy current non-destructive testing probe (ECTP). The electromagnetic field is computed using FEMM 2D finite element code. The aim of this optimization was to determine coil dimensions and positions that improve ECTP sensitivity to physical properties of the tested devices.

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Sulaiman, Sulaiman, Budi Utomo, and I. Putu Agung Ardi Wijana. "ANALISIS UJI TIDAK MERUSAK PADA SAMBUNGAN LAS LAMBUNG FRAME 103 BAGIAN KAMAR MESIN KAPAL PATROLI 73 DENGAN METODE RADIOGRAPHY TEST." Gema Teknologi 20, no. 4 (April 30, 2020): 146–52. http://dx.doi.org/10.14710/gt.v20i4.28516.

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Non-Destructive Test is a supporting tool that is highly relied upon by the activities of controlling and ensuring the quality of a welding. Radiography test is one of the non-destructive tests that uses gamma rays that can penetrate almost all metals so that it can be used to reveal defects or discrepancies behind metal walls or within the material itself. The purpose of this paper is to know, plan a non-destructive testing activity with radiography test which includes the understanding along with the equipment needed during the testing process, what devices contribute to the testing process, as well as knowing the advantages and disadvantages of the test radiography. The method used in This writing is by experiment with welding connection frame 103 Patrol Ship 73 engine rooms. Radiography Test results found no welding defects on the inside of the welding as deep as a plate thickness, so that otherwise passed the checking received by BKI. Good preparation and consideration are needed before conducting this test.

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Bagaev, K. A., and N. N. Konovalov. "ABOUT THE PROCEDURAL FRAMEWORK OF THE DIGITAL RADIOGRAPHY AT HAZARDOUS INDUSTRIAL FACILITIES." Kontrol'. Diagnostika, no. 253 (July 2019): 52–54. http://dx.doi.org/10.14489/td.2019.07.pp.052-054.

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Radiation testing is non-destructive testing method widely used to detect internal imperfections of technical devices, buildings and constructions at hazardous industrial facilities. Digital radiography is the modern method, which uses phosphor imaging plate as the detector of ionizing radiation. Creation of the relevant procedural framework is the necessary condition for the use of digital radiography at hazardous industrial facilities.

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Luo, Yi, Ying Li, Zai Xiu Chen, Kai Wang та Yong Han. "Automatic Control Instrument of γ-Ray Non-Destructive Testing Equipment". Advanced Materials Research 271-273 (липень 2011): 945–48. http://dx.doi.org/10.4028/www.scientific.net/amr.271-273.945.

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With the NDT radioactive isotope widely used in engineering, it puts forward higher requirements for NDT. As the complexity of the device working environment and high reliability requirements, system reliability and security is the focus of the entire design. This NDT uses PT and PLC to operate and control machine and optical encoder to achieve the collection of the source location parameters, DC torque motor drive to ensure jitter-free, long locked rotor, uniform speed drive performance to ensure machine security and stability.

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Mali, Madan, and Sheetal Tak-Barekar. "Non-Destructive Vector Fault Locator to Detect Resistive Open Defects in Static Random Access Memory with Improved Performance." Journal of University of Shanghai for Science and Technology 23, no. 07 (July 13, 2021): 667–77. http://dx.doi.org/10.51201/jusst/21/07193.

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The efforts in the semiconductor industry lead to the up-gradation of device size and performance of the devices. Extensive use of cache memory with significant size has become the requirement of most devices, applications, and gadgets. Advanced nanotechnology has resulted in scaled devices and more components with complex circuitry on system-on-chip. The memories are placed incredibly more profound in the die, and memory pins are not accessible readily, leading to more complications in testing the memories. The manufacturing of scaled devices is also a challenging task. A slight variation in doping concentration or process, supply voltage, temperature variations leads to faults in the memory. Advanced technology has increased the possibilities of occurrences of resistive defects in memories. For the smooth operation of systems with high reliability, it is essential to detect all the defects in the memory. In this paper, the detection of resistive defects is proposed at an early stage to increase the life span of the memory cells. Feeble cell detected at an early stage inhibits the more mutilation of the cells and improves memory reliability. An extensive range of defective values is used to analyze the proposed method to cover all positions of the defects in the cell. The proposed method detects the resistive defects with a minimum test time of 81.95μs for 4KB of the memory and contributes a negligible area overhead of 0.77%.

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Steinchen, W., L. Yang, G. Kupfer, and P. Mäckel. "Non-destructive testing of aerospace composite materials using digital shearography." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 212, no. 1 (January 1, 1998): 21–30. http://dx.doi.org/10.1243/0954410981532108.

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Digital shearography, a laser interferometry technique in conjunction with the digital imaging processing, has the potential for identifying defects both in small- and large-scale structures. This paper will focus on the recent development of digital shearography for non-destructive testing (NDT). With the improvement of the measuring methods and the development of a small and mobile measuring device in conjunction with a user-guided program, Shearwin, this laser inspection technique can be used easily in the environment of fieldwork. A few examples show its application in the aerospace industry for NDT of composites, e.g. GLARE panel, honeycomb structure and glass (or carbon)-fibre-reinforced plastics, etc.

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30

Iannuzzo, Francesco. "Short-circuit robustness assessment in power electronic modules for megawatt applications." Facta universitatis - series: Electronics and Energetics 29, no. 1 (2016): 35–47. http://dx.doi.org/10.2298/fuee1601035i.

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In this paper, threats and opportunities in testing of megawatt power electronic modules under short circuit are presented and discussed, together with the introduction of some basic principles of non-destructive testing, a key technique to allow post-failure analysis. The non-destructive testing equipment at CORPE, center of reliable power electronics, Aalborg University, Denmark, is presented and its features are discussed in detail, together with some relevant results. Limitations of experimental analysis have also been addressed, together with the introduction of a mixed thermal-electrical simulation tool originally developed to study abnormal conditions and helping to predict very fast and dangerous thermal transient especially in case of worn out devices. The paper is concluded with an overview on present challenges in next-generation semiconductors for such high power ranges - basically silicon carbide - and new concepts for nondestructive testing of ultrafast power modules adopting such a technology.

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31

Denbnovetsky, S. V. "Simulation of radiation characteristics of pulse X-ray devices for non-destructive testing the semiconductor materials." Semiconductor Physics, Quantum Electronics & Optoelectronics 9, no. 1 (March 1, 2006): 68–72. http://dx.doi.org/10.15407/spqeo9.01.068.

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32

Shulzhenko, M. G., O. F. Polishchuk, Yu G. Iefremov, and K. V. Avramov. "Specialized non-destructive testing devices for evaluation of the technical condition of rotary and non-rotary parts of mechanisms." Tehničeskaâ diagnostika i nerazrušaûŝij kontrolʹ 2020, no. 3 (September 28, 2020): 53–57. http://dx.doi.org/10.37434/tdnk2020.03.08.

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33

Cornu, B., C. Roure, D. Moulin, N. Estre, D. Tisseur, M.-P. Ferroud-Plattet, P. Kinnunen, P. Kotiluoto, and A. Revuelta. "Non-Destructive Examination Development for the JHR Material Testing Reactor." EPJ Web of Conferences 225 (2020): 04001. http://dx.doi.org/10.1051/epjconf/202022504001.

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The Jules Horowitz Reactor (JHR) is a European material testing reactor (MTR) under construction at the CEA Cadarache centre. It will be dedicated to material and fuel irradiation tests, as well as to the production of medical isotopes. Gamma and X-Ray benches will be implemented in the reactor pool (RER), the irradiated component storage pool (EPI) and in a shielded hot cell for measuring either the whole underwater test device still containing the experimental sample or just the experimental sample before its extraction in the hot cell. The CEA/Cadarache Nuclear Measurement Laboratory (LMN) has been working in collaboration with VTT (Technical Research Centre in Finland Ltd.) since 2008 under a Finnish in-kind contribution agreement. This agreement focuses on the development of NDE systems implementing gamma-ray spectroscopy and high-energy X-ray imaging of the sample and irradiation device with the highest definition possible (resolution of 100 μm). The CEA-VTT technical specifications led to a European call for tenders launched by VTT. The contract was awarded to the Spanish company IDOM for the design, manufacturing, assembly and commissioning of: - Underwater gamma and X-ray (UGXR) mechanical benches and their associated gamma and X-ray collimation systems for the RER and EPI pools - Hot cell gamma and X-ray (HGXR) bench in the JHR NDE hot cell. The Final Design Reviews (FDR) of the UGXR and HGXR systems were completed in 2016. The design phase has been an iterative process in order to manage interfacing specifications and constraints: - Challenging experimental requirements, mainly to cover the wide diversity of sample shapes, sample activity levels and measurement processes, but also to achieve a level of mechanical accuracy to reach the ambitious geometrical resolution target in X-ray imaging, - Environmental constraints (immersion, radiation, compactness, limited accessibility for maintenance), - Nuclear safety constraints (seism, radiation protection). The whole design process has produced a number of elaborate and innovative mechatronic systems, which is rather unusual in nuclear applications since the resulting solutions have benefited from IDOM’s technological expertise in designing and commissioning large telescopes for the astronomy sector. Once the manufacturing phase and assembly finalised, the site acceptance tests for the UGXR and HGXR mechanical systems will be performed in 2019-2020 in the TOTEM facility at the CEA Cadarache center. The underwater benches will be tested in the CESARINE pool to check their requirements.

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Artemiev, B. V., V. T. Bobrov, D. I. Galkin, A. G. Efimov, V. I. Matveev, O. E. Monahov, and A. E. Shubochkin. "WE ARE PROUD OF OUR PAST, WE MAKE THE GLOBAL FUTURE. THE MAIN STAGES OF DEVELOPMENT OF THE SCIENTIFIC RESEARCH INSTITUTE OF INTROSCOPY." Kontrol'. Diagnostika, no. 258 (December 2019): 54–61. http://dx.doi.org/10.14489/td.2019.12.pp.054-061.

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The short essay on the history, which begins in 1964, of the Research Scientific Institute of Introscopy (hereinafter referred to as the Institute) is presented. The main stages of the establishment and development of the Institute are considered. Over the years, dozens of world-famous scientists have worked in the Institute, more than 770 types of diagnostic devices and stationery equipment for all sectors of the national economy have been developed, more than 620 monographs and 3300 scientific articles have beenpublished, more than 5100 copyright certificates and patents for inventions have been registered. The Institute provided significant assistance in the establishment of Departments of Non-Destructive Testing at a number of universities in the Russia/USSR (MPEI, MIREA, etc.) for the training of high-ranking engineers in the field of non-destructive testing and introscopy. The devices and equipment invented and designed at the Institute were mass-produced at many enterprises in the Russia/USSR (Elektrotochpribor factory, Volna Production Association, Introscope JSC (Chisinau), Aktyubrentgen JSC factory (Aktobe), Tochpribor KhPO (Kharkov), Veda Production Association (Kiev), SKB Gazpriboravtomatika (Moscow), Kontrolpribor plant (Moscow),Sevkavrentgen plant (Maisky).

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Karpov, Denis, and Anton Sinitsyn. "Thermal Method for Non-Destructive Control of Actual Coolant Mass Flow through a Heating Device." E3S Web of Conferences 161 (2020): 01041. http://dx.doi.org/10.1051/e3sconf/202016101041.

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The studies show that expenses for heating buildings and structures account for more than 60% of total utility costs in the Russian Federation. Therefore, the issues on energy and resource conservation and improving the energy efficiency of construction projects for various purposes are relevant and priority. Infrared thermography is actively used during examination of thermomechanical equipment, building structures, external and internal engineering systems and their elements. Heat monitoring makes it possible to avoid significant costs for dismantling of controlled objects and to localize the thermal defects found during the inspection stage, thereby reducing costs of repair works. The article considers and analyzes the existing options for the quantitative analysis of thermograms. The authors propose a new method for quantitative processing of thermograms, aimed at assessing the operation of heating devices in heating systems of buildings and structures. The essence of thermal non-destructive testing technique is to determine the actual mass flow rate of coolant through the heating device.

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Macku, Robert, Pavel Koktavý, and Pavel Škarvada. "Non-Destructive Characterization of Micro-Sized Defects in the Solar Cell Structure." Key Engineering Materials 465 (January 2011): 314–17. http://dx.doi.org/10.4028/www.scientific.net/kem.465.314.

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This article discusses the issue of noise measurements application for the quality assessment of the solar cells themselves and production technology alike. The main focus of our research is the random n-level (in most case just two-level) impulse noise, usually referred to as microplasma noise. This noise was found to be in a direct consequence of local breakdowns in micro-sized regions and brings about a reduction of lifetime or a destruction of the pn junction. Non-destructive measurement methodology as presented here is suitable for testing of a large number of various semiconductor devices not only for solar cells. In this paper experimental measurement of noise signals in the frequency and time domain is presented. Furthermore the microplasma noise behaviour and defect geometry is discussed.

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37

Kazkeyev, Alizhan, and Aleksej Aniskin. "Analysis of methods for assessing the condition of surveyed facilities in Taraz City." Technobius 2, no. 1 (March 30, 2022): 0015. http://dx.doi.org/10.54355/tbus/2.1.2022.0015.

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Due to the high demand for technical inspection services for buildings and structures, new equipment designed for use in certain conditions appears on the market. On this basis, this article is devoted to the analysis of existing devices and equipment for technical inspection of buildings and structures. The analysis of equipment was carried out during the survey of 8 facilities of Novozhambyl phosphorus plant in Taraz city. In the analysis devices for non-destructive method of strength measurement were used. Based on the results obtained during the tests, the analysis was carried out. Thus, the device UKS MG4 showed the greatest deviation in the measurements when testing the reinforced concrete structures than the devices IPS MG4 and sclerometer. When controlling the reinforcement of reinforced concrete structures by electromagnetic method, the greatest accuracy of measurements showed the device Elcometer 331. The UTM-MG4 device showed a smaller error in measurements compared to a similar A1208 device. As a result of a comparative analysis of devices for determining the humidity of building materials Testo 606 showed a more reliable data, due to a different principle of operation relative to similar devices.

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38

Yang, Jing, Wei Heng Yuan, and Jun Tan. "Research on Non-Destructive Testing for Defects of Steel Bar in Concrete." Applied Mechanics and Materials 351-352 (August 2013): 143–47. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.143.

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Steel bar defect detection in concrete is an important content of civil engineering structure detection. Currently there are no effective methods for nondestructive testing of steel bar defects . This paper studies the application of electromagnetic induction technology for Steel bar defect detection. Firstly, the principle of electromagnetic induction technology to detect rebar are described. Secondly,an air dielectric test device was designed and Steel bar defect in the device was detected by magnetic scanner. Through analyzing we got the characteristics of scanning images from different Steel bar defects. Thirdly this experimental result was compared with detection result in concrete.Finally verify the accuracy and feasibility of this method.

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39

Zoio, Patrícia, and Abel Oliva. "Skin-on-a-Chip Technology: Microengineering Physiologically Relevant In Vitro Skin Models." Pharmaceutics 14, no. 3 (March 21, 2022): 682. http://dx.doi.org/10.3390/pharmaceutics14030682.

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The increased demand for physiologically relevant in vitro human skin models for testing pharmaceutical drugs has led to significant advancements in skin engineering. One of the most promising approaches is the use of in vitro microfluidic systems to generate advanced skin models, commonly known as skin-on-a-chip (SoC) devices. These devices allow the simulation of key mechanical, functional and structural features of the human skin, better mimicking the native microenvironment. Importantly, contrary to conventional cell culture techniques, SoC devices can perfuse the skin tissue, either by the inclusion of perfusable lumens or by the use of microfluidic channels acting as engineered vasculature. Moreover, integrating sensors on the SoC device allows real-time, non-destructive monitoring of skin function and the effect of topically and systemically applied drugs. In this Review, the major challenges and key prerequisites for the creation of physiologically relevant SoC devices for drug testing are considered. Technical (e.g., SoC fabrication and sensor integration) and biological (e.g., cell sourcing and scaffold materials) aspects are discussed. Recent advancements in SoC devices are here presented, and their main achievements and drawbacks are compared and discussed. Finally, this review highlights the current challenges that need to be overcome for the clinical translation of SoC devices.

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Grigoriev, Michael, and Nikita V. Turushev. "Preliminary Medical Studies of Electrocardiograph on Nanosensors." Applied Mechanics and Materials 770 (June 2015): 526–30. http://dx.doi.org/10.4028/www.scientific.net/amm.770.526.

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Precision methods and devices for the diagnostics of cardiovascular diseases are the one of the main directions of modern technology development in the field of medical instrument making. However, at this stage of development there are a few overall devices that allow for the diagnostics of cardiac muscle with precise accuracy and without internal interference in the body. This study considers the methods for measurement of biopotentials from the surface of the human body by means of electrocardiographic nanosensors. The device developed in the laboratory No. 63 of the Institute of Non-Destructive Testing of the National Research Tomsk Polytechnic University, its parameters and main characteristics are considered. The article focuses on the use of more sensitive equipment for more detailed study of the human body. The results of measurements carried out by means of the developed device are given.

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Kumar, Chandan, Adam Redman, William Leggate, Robert L. McGavin, and Tony Dakin. "Assessment of the application of a SMART THUMPER™ as a low-cost and portable device used for stiffness estimation of timber products." BioResources 16, no. 3 (July 7, 2021): 5838–61. http://dx.doi.org/10.15376/biores.16.3.5838-5861.

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Non-destructive evaluation methods for timber stiffness are gaining increased interest as an alternative to static testing since they can be fast, cost-effective, and transportable, as well as non-destructive. The objective of this study was to evaluate the accuracy and limitations of a newly developed smartphone application (SMART THUMPER™) for the non-destructive evaluation of timber stiffness properties. The study determined the effect of the length, density (species), and cross-section sizes of the timber samples on the stiffness results. The results were compared to beam identification by non-destructive grading (BING©), an existing commercial non-destructive testing technology for evaluating the mechanical quality of wood and other materials. It was found that the application can be used to reliably estimate the stiffness of various timber products with a resonance frequency value below 2000 Hz. Frequencies greater than 2000 Hz were found to induce errors due to the smartphone microphone, which is engineered to acquire a lower frequency range. A reliability matrix providing an indication of the accuracy of SMART THUMPER™ estimation was presented, which may also prove useful in selecting appropriate sample lengths prior to testing. The sample length or dimensions can be manipulated to lower the frequency, and hence, to improve the results.

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42

Mittereder, Jeffrey A. "Backside Etching of GaAs Devices." Microscopy Today 5, no. 2 (March 1997): 18–19. http://dx.doi.org/10.1017/s1551929500060090.

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The following is a technique for analyzing the area underneath a GaAs integrated circuit or discrete device which may aid in failure analysis. This procedure has been used in the past by the microelectronics community, and it is reviewed here for GaAs monolithic microwave integrated circuits (MMICs) and discrete devices. Because it is a destructive method, we use it in our lab after all other testing is completed. The substrate thickness of the GaAs is ∼4 mils (25 μm).

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43

Plachý, Tomáš, Pavel Tesárek, Lukáš Hlubocký, Jaromír Hrůza, Jozef Fládr, Jan Trejbal, and Zdeněk Prošek. "Effect of Microfillers on Selected Destructive and Nondestructive Mechanical Properties of Cement Mortars: Different Types of Recycled Materials." Key Engineering Materials 722 (December 2016): 195–200. http://dx.doi.org/10.4028/www.scientific.net/kem.722.195.

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The paper presents the use of non-destructive testing to determine the evolution of mechanical properties. For testing, we used the resonance method. The measuring device of company Brüel&Kjær was used. Specifically, evolution of dynamic modulus of elasticity (determined from the longitudinal and transverse vibration) and the shear modulus was determined for the first 28 days after production of the samples. The results of non-destructive method were also used for verifying the relevance of the results of destructive testing, specifically the results of the compressive strength and a three-point flexural strength. Testing of mechanical properties was performed on samples of cement mortars, where the micronized recycled concrete and micronized marble powder were used as microfillers, both materials were prepared on a high-speed mill of the Lavaris company (Czech Republic).

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44

Liu, Weihui, Yanan Han, Na Wang, Zhen Zhang, Qingguo Wang, and Yongping Miao. "Apple sugar content non-destructive detection device based on near-infrared multi-characteristic wavelength." Journal of Physics: Conference Series 2221, no. 1 (May 1, 2022): 012012. http://dx.doi.org/10.1088/1742-6596/2221/1/012012.

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Abstract Knowing the sugar content of apples in time and grading the internal quality of apples can meet the requirements of different consumers for apples. In this paper, Yantai Red Fuji apples are used as the research object, a low-cost and portable non-destructive testing device for apple sugar content is designed based on near-infrared detection technology. To realize the quantitative detection of apple sugar content, The relationship between the voltage value of diffuse reflection light and the sugar content of apples at multiple characteristic wavelengths is studied, and the multiple linear regression method is used to establish the apple sugar content prediction model. The correlation coefficient predicted by the model is 0.7708, and the minimum relative error is 0.89%. The experimental results show that within a certain error range, the device can realize fast and non-destructive detection of the sugar content of apples. This article provides a reference for the realization of a low-cost, portable non-destructive testing device for Apple.

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45

Wang, Xiujuan, Zhihong Fu, Yao Wang, Renkuan Liu, and Lin Chen. "A Non-Destructive Testing Method for Fault Detection of Substation Grounding Grids." Sensors 19, no. 9 (May 2, 2019): 2046. http://dx.doi.org/10.3390/s19092046.

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The grounding grid is critical to the safety and stability of a power system. Corrosive cracking of the grounding conductor is the main cause of deterioration of grounding grid performance. Existing fault diagnosis methods for grounding grids are limited by the number and distribution of grounding leads, and some of them cannot be used for online detection. This paper proposes a grounding grid detection method based on magnetic source excitation. The measuring device consists of four coils, two horizontal excitation coils, and two vertical receiving coils. The secondary magnetic field signal is extracted from the primary field and the background field by properly positioning the coils, such that the measured signal can reflect the underground media more accurately. The measuring device of the method is portable, the measurement process is contactless with the grounding grid, and it is not limited by the grounding leads. Furthermore, it has a strong anti-interference ability and can realize online detection. It was proven by simulations and experiments that the proposed method has a higher measurement accuracy and stronger anti-interference ability when compared with existing methods. This paper also discusses the influence of various factors such as the number and the location of the breakpoints, the frequency of the excitation source, the soil resistivity, and stratification from the measurement data. It was proven that the method has high precision and a wide application range, and is important for guiding significance and reference value in engineering applications.

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Betta, Giovanni, Pietro Burrascano, Luigi Ferrigno, Marco Laracca, Marco Ricci, and Giuseppe Silipigni. "An experimental comparison of complex excitation sequences for eddy current testing." ACTA IMEKO 4, no. 1 (February 5, 2015): 128. http://dx.doi.org/10.21014/acta_imeko.v4i1.179.

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Eddy Current Testing (ECT) is a Non Destructive technique widely used in many industrial application fields in which it is very important to detect the presence of thin defects (generally called cracks) in conductive materials. Features of this technique are the cost-effective implementation and the kind of retrieved measured data that make possible to estimate the geometrical characteristics of a crack as position, length, width and depth. The analysis of these characteristics allows the user to accept or discard realized components then improving the production chain. To accomplish for this task some aspects have to be taken into account during the measurement process. They mainly concern the realization of suitable measurement setup and post processing stages. As far as the measurement setup is concerned, crucial aspects are the choice of measurement and excitation devices. The choice of optimized excitation devices and strategies is of interest for research on Non Destructive ECT (ND-ECT): together with common aspects as the amplitude and the frequency of the exciting signal, the attention has been paid to issues as the type of signal to be adopted. In particular it has been found as the use of complex excitation signals, meant as signals different from the sinusoidal ones and with wide frequency content, might raise eddy current responses trying to support the measurement, detection and characterization stages when "difficult cases" are explored (i.e. very small and/or annealed cracks). In this paper the authors propose an experimental comparison of different excitation signals designed to improve the quality of experimental data when difficult cases are experienced and, consequently, to obtain a more reliable extraction of defects geometrical features.

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47

Mireei, Seyed Ahmad, Morteza Sadeghi, Alireza Heidari, and Abbas Hemmat. "On-line firmness sensing of dates using a non-destructive impact testing device." Biosystems Engineering 129 (January 2015): 288–97. http://dx.doi.org/10.1016/j.biosystemseng.2014.10.012.

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48

Luo, Xiao Yu, Yu Zhang, Zi Jian Wang, and Yi Sheng Zhang. "Non-Destructive Testing Device for Hot Forming High Strength Steel Parts Based on Barkhausen Noise." Applied Mechanics and Materials 423-426 (September 2013): 2555–58. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.2555.

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In order to realize the nondestructive testing for hot forming high strength steel parts, a hardness testing device based on Magnetic Barkhausen Noise (MBN) was developed. By measuring MBN of standardized blocks of Rockwell hardness and extracting feature values of the noise, a fitted curve between hardness and MBN peak was calibrated. Good linearity was found between hardness and MBN peak within high hardness range 35~60HRC. The testing device was proved to be high-precision and stable by measuring the practical high strength steel parts.

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Dolmatov, Dmitry O., Daniel Tarrazó-Serrano, German A. Filippov, Antonio Uris, and Dmitry A. Sednev. "Application of Phase-Reversal Fresnel Zone Plates for High-Resolution Robotic Ultrasonic Non-Destructive Evaluation." Sensors 21, no. 23 (November 23, 2021): 7792. http://dx.doi.org/10.3390/s21237792.

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Nowadays the development of automated inspection systems based on six degrees of freedom robotic manipulators is a highly relevant topic in ultrasonic non-destructive testing. One of the issues associated with such development is the problem of acquiring high-resolution results. In this article, the application Phase-Reversal Fresnel Zone Plates is considered for solving this problem. Such acoustic lenses can solve the task of high-resolution results acquisition by using a single unfocused transducer. Furthermore, Phase-Reversal Fresnel Zone Plates can provide the desired focusing depth with the fixed thickness of the coupling layer. It is important in the case of application of devices which provide localized coupling. In this paper a proper design of Phase-Reversal Fresnel Zone Plate was determined according to the conditions of planned experiments. Its efficiency was verified via the Finite Element Method modeling. In all performed experiments the relative error of flaws size estimation did not exceed 6% whereas the signal-to-noise ratio was not lower than 17.1 dB. Thus, experimental results demonstrate that the application of Phase-Reversal Fresnel Zone Plates allowed to obtain results with high lateral resolution and signal-to-noise ratio. These results demonstrate the reasonability of the development of devices that provide localized coupling and use Phase-Reversal Fresnel Zone Plates.

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Baskaran, B. V., M. Sreenivasan, G. Ya Bezlyudko, Ye I. Yolkina, R. N. Solomakha, and B. Ye Popov. "Coercivity Metering as the Basic Method of a Non-Destructive Testing of Fatigue and as the Priority Method in the Diagnostic Set." Advanced Materials Research 146-147 (October 2010): 1340–45. http://dx.doi.org/10.4028/www.scientific.net/amr.146-147.1340.

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Here "coercivity metering" or "coercimetry" (c.m.) means a non-destructive testing of the mechanical properties, deflected mode and fatigue capacity based on measurements of the magnetic characteristic of metal – i.e. coercivity. All listed below merits are most fully achieved when working with coercimeters (magnetic structure scopes) of SSE Company. And it is so not because the authors represent this company but rather because these devices feature a number of consumer and technical merits, which those of other manufacturers do not. Among them, the main thing is the highest clearance insensitivity i.e. when the device readings depend only on the properties of the metal, they do not depend on confounding factors, such as protective coating (paint, film, etc.) up to 6 mm (!) thick on the tested metal, or equivalent to such clearance corrosion layers, roughness, curvature of the surface, etc.

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