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Добірка наукової літератури з теми "Devices of non-destructive testing"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Devices of non-destructive testing"

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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Більше джерел

Дисертації з теми "Devices of non-destructive testing"

Lowea, D. "Methods of non-destructive testing." Thesis, Київський національний університет технологій та дизайну, 2019. https://er.knutd.edu.ua/handle/123456789/14600.

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Десятниченко, Алексей Владимирович. "Электромагнитно-акустический толщиномер для контроля металлоизделий с диэлектрическими покрытиями". Thesis, НТУ "ХПИ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/17117.

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Диссертация на соискание ученой степени кандидата технических наук по специальности 05.11.13 – приборы и методы контроля и определения состава веществ. – Национальный технический университет "Харьковский политехнический институт", Харьков, 2015. Диссертация посвящена решению важной научно-практической задачи обеспечения ультразвукового контроля толщины металлоизделий электромагнитно-акустическим методом при наличии диэлектрических покрытий (зазоров) толщиной до 10 мм. В работе выполнен анализ существующих акустических методов и устройств для измерения толщины, которые широко используются в отечественной и зарубежной промышленности, рассмотрены основные их преимущества и недостатки. Методы разделяются по типу контакта датчика с объектом контроля на два основные класса: контактные и бесконтактные. Бесконтактные на сегодняшний день являются наиболее перспективными. К ним относятся методы, основанные на: воздушно акустической связи, термо- и оптико-акустическом эффектах, а также на эффектах электрического и электромагнитного полей. По результатам анализа недостатков приведенных методов, выделен наиболее перспективный – ЭМА метод. Рассмотрены вопросы выбора оптимального сигнала для возбуждения акустических колебаний ЭМА методом. Приведены расчеты принимаемой энергии для общего случая при зеркальной схеме контроля, когда передающий и приемный датчики не располагаются соосно по высоте изделия. Рассмотрены модели расчетов для зеркально теневой схемы контроля, отдельно для режимов излучения ЭМАП в виде длинных и коротких импульсов. Дан анализ целесообразности использования вариантов зондирующего сигнала с различными соотношениями длины импульсов и расстояний между ними. Рассмотрена электрическая модель выходного каскада усилителя зондирующего сигнала и датчика, описаны особенности ее работы. Приведены результаты экспериментальных исследований и разработок, направленных на повышение качества и производительности контроля толщины с использованием ЭМА метод возбуждения и приема акустических колебаний. Представлена конструкция макета ЭМА преобразователя для контроля металлоизделий при наличии зазора между датчиком и изделием. Рассмотрены вопросы построения передающего и приемного аналоговых трактов, приведены схемотехнические и конструктивные решения. Приведены результаты исследований зависимости амплитуды сигнала на генерирующей обмотке ЭМАП от напряжения питания усилителя. Проведены исследования зависимости уровня полезного сигнала он напряжения на передающей обмотке датчика. Исследовано влияния зазора на уровень полезного сигнала. Приведены результаты зависимости длительности «мертвой» зоны от зазора и способы ее снижения. Определены факторы, влияющие на точность контроля. Разработан толщиномер основанный на электромагнитно акустическом методе возбуждения и приема акустических волн, приведены результаты этой разработки. Рассмотрены особенности построения его составных частей. Рассмотрены алгоритмы цифровой обработки принятого сигнала. Проведена оценка метрологических характеристик разработанного прибора, изготовлен контрольный образец для метрологического обеспечения толщиномера. Приведено сравнение нового прибора с существующими аналогами.
Thesis for granting the Degree of Candidate of Technical sciences in speciality 05.11.13 – Devices and methods of testing and materials structure determination. – National technical university "Kharkiv Politechnical Institute", Kharkiv, 2015. Thesis is devoted to solution of important theoretical and practical task to ensure ultrasound control of the metal products thickness by using electromagnetic-acoustical method in cases of dielectric coatings (gaps) with thickness up to 10 mm. Work includes analysis of existing acoustic methods and devices for thickness measurement, their main advantages and disadvantages are reviewed. Based on the results of analysis of the given disadvantages, the most advanced ways was set off - electromagnetic-acoustical (EMA) method. The problems of selection of the optimal signal agitate sonorous vibrations by EMA method were reviewed. Calculations of the taken energy are given for the analysis of the practicability to use variants of probing signal. Electric model of amplifier output stage of probing signal and sensor is reviewed, peculiarities of its operation are described. Results of researches and developments dedicated to increase thickness measurement quality and efficiency are given. Matters to build of the transmitting and receiving analog tracts are reviewed. The signal level dependence on voltage research on sensor's transmitting winding are conducted. Impact of a gap on the signal level was examined. Results of the dependence of dead spot length on a gap and methods to its reduction are given. Factors affecting accuracy of control are determined. EMA thickness gauge was designed. The main factors of design are examined. The digital processing algorithm of the received data was reviewed. Metrological characteristics of the developed device were made.

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Десятніченко, Олексій Володимирович. "Електромагнітно-акустичний товщиномір для контролю металовиробів з діелектричними покриттями". Thesis, НТУ "ХПІ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/17045.

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Анотація:

Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.11.13 – прилади і методи контролю та визначення складу речовин. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2015. Дисертація присвячена вирішенню важливої науково-практичної задачі, яка полягає у забезпеченні ультразвукового контролю товщини металовиробів електромагнітно-акустичним методом при наявності діелектричних покриттів (зазорів) товщиною до 10 мм. У роботі виконано аналіз існуючих акустичних методів і пристроїв для вимірювання товщини, розглянуті основні їх переваги та недоліки. За результатами аналізу недоліків наведених методів, виділений найбільш перспективний – ЕМА метод. Розглянуто питання вибору оптимального сигналу для збудження акустичних коливань ЕМА методом. Наведено розрахунки прийнятої енергії. Дано аналіз доцільності використання різних варіантів сигналу зондування. Розглянуто електричну модель вихідного каскаду підсилювача сигналу зондування і датчика, описано особливості її роботи. Наведено результати експериментальних досліджень і розробок спрямованих на підвищення якості та продуктивності контролю товщини. Представлена конструкція макета ЕМА перетворювача для контролю металовиробів при наявності зазору між датчиком і об'єктом. Розглянуто питання побудови передавального і приймального аналогових трактів, наведені конструктивні рішення. Досліджено залежність амплітуди сигналу на генеруючої обмотці ЕМАП від напруги живлення підсилювача. Проведено дослідження залежності рівня корисного сигналу він напруги на передавальній обмотці датчика. Досліджено впливу зазору на рівень корисного сигналу. Наведено результати залежності тривалості "мертвої" зони від зазору і способи її зниження. Визначено фактори, що впливають на точність контролю. Розроблено ЕМА товщиномір, розглянуті особливості побудови та питання схемотехніки його складових частин. Розглянуто алгоритми цифрової обробки прийнятого сигналу. Наведено опис виготовленого контрольного зразка для метрологічного забезпечення толщиномера.
Thesis for granting the Degree of Candidate of Technical sciences in speciality 05.11.13 – Devices and methods of testing and materials structure determination. – National technical university "Kharkiv Politechnical Institute", Kharkiv, 2015. Thesis is devoted to solution of important theoretical and practical task to ensure ultrasound control of the metal products thickness by using electromagnetic-acoustical method in cases of dielectric coatings (gaps) with thickness up to 10 mm. Work includes analysis of existing acoustic methods and devices for thickness measurement, their main advantages and disadvantages are reviewed. Based on the results of analysis of the given disadvantages, the most advanced ways was set off - electromagnetic-acoustical (EMA) method. The problems of selection of the optimal signal agitate sonorous vibrations by EMA method were reviewed. Calculations of the taken energy are given for the analysis of the practicability to use variants of probing signal. Electric model of amplifier output stage of probing signal and sensor is reviewed, peculiarities of its operation are described. Results of researches and developments dedicated to increase thickness measurement quality and efficiency are given. Matters to build of the transmitting and receiving analog tracts are reviewed. The signal level dependence on voltage research on sensor's transmitting winding are conducted. Impact of a gap on the signal level was examined. Results of the dependence of dead spot length on a gap and methods to its reduction are given. Factors affecting accuracy of control are determined. EMA thickness gauge was designed. The main factors of design are examined. The digital processing algorithm of the received data was reviewed. Metrological characteristics of the developed device were made.

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McLaren, S. "High-resolution ultrasonic non-destructive testing." Thesis, City University London, 1987. http://openaccess.city.ac.uk/8335/.

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The use of ultra-short pulse wideband ultrasonic transducers in Non-Destructive-Testing (NDT) has been investigated both theoretically and experimentally. It is demonstrated that the resolution of pulse-echo NDT is affected by diffraction effects which also complicate the interpretation of echo signals. These diffraction effects are interpreted in terms of the plane- and edge-wave model of *transducer fields. Improverents can be obtained by the use of non-uniformly excited transducers of two basic types: the first, the plane-wave-only (PWO) source; is more strongly excited at its centre than towards the rim, where the excitation is gradually reduced to zero in order to remove the edge wave. The second type, an edge-wave-only (EWO) source, is more strongly excited at its rim than in the centre, thereby effectively removing the plane wave. Computer modelling of pressure waveforms in the field of PWO and EWO sources has been carried out using an extension to the impulse response method. Experimental point-pressure waveform measurements in the field of a prototype EWO transducer, made using a miniature ultrasonic probei are in reasonable agreement with the calculated results. Detailed calculations are made of the transmit-receive mode (pulse-echo) responses arising from solid targets of various size in a flu- id medium interrogated by uniformly and non-uniformly excited sources. The theoretically predicted results are in good agreement with experimentally measured results obtained using a conventional transducer and an equivalent prototype EWO transducer. The effects of target size, field position and material on both the amplitude and shape of the echo responses are investigated. The structure of the responses is explained in terms of the plane and edge waves radiated by the source. Implications for the use of techniques to both size (Distance, Gain, Size curves) and characterise (ultrasonic spectroscopy) defects are examined. The applications of new, nonuniformly excited transducers in high-resolution NDT and ultrasonic imaging are evaluated.

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Warren, Laura. "Non destructive testing of drystone walls." Thesis, University of Bath, 2018. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760966.

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Drystone structures have been widely used throughout the UK and other parts of the world for hundreds of years. Many of these structures are still in use today with many of the existing drystone structures within the UK being over 100 years old. Drystone construction techniques have formed over the years to make best use of stone properties, enabling these structures to resist the loadings upon them. Typical construction styles can often be attributed to certain types of stone, each with their own characteristics. Within these styles subtle variations can be found, often specific to an area, which work best with the properties of the local stone types. The predominant use of drystone structures also influences the way in which they are built in a particular area. This has been demonstrated in comparing the construction within the UK to that in the Cevennes area of France. The existing retaining wall stock needs to be assessed by the authorities that manage them. Many of these walls support highways and infrastructure, so adequate assessment and monitoring of these structures is vital to ensuring these services are maintained. Assessment of a structure mainly relies on engineering judgement, often with little to no prior knowledge of its behaviour or details of its construction. This thesis studies a wide number of walls both in the UK and France to understand qualitatively the construction of these structures, and how the material used together with local practise influences the overall construction. This in turn influences the ways in which loads are resisted by each of the main construction types. Following from this it goes on to look at practical ways in which assessment could be aided by identifying features within a wall that are known to assist or hinder a wall’s performance. The main technique developed for this is thermal imaging. Through practical studies and thermal modelling, a number of proposals have been put forward regarding the best times of day for using this technique. The type of features that may be identified has also been examined and discussed.

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Hedlund, Nadja. "Non-Destructive Testing Of Concrete Bridges." Thesis, Luleå tekniska universitet, Byggkonstruktion och brand, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-81923.

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Non-destructive testing is of great value in cases where a structure's future is investigated to find out what the best measure is. It is not always the best solution to demolish and build new. Many structures can be repaired and function several more years. In this thesis the main goal is to investigate some different non-destructive techniques and learn more about difficulties and strengths. The test subjects will be a cast T-beam in a laboratory environment as well as a case study of a railway bridge in Abisko. The different testing equipment being used in this thesis is a covermeter, a rebound hammer and ultrasonic pulse velocity. For both the T-beam and the bridge the results are overall very good. The covermeter is proven to be both easy to use and very reliable and the ultrasonic pulse velocity was more to learn about and more difficult but is giving very good results as well. Conclusions after the thesis project is that it requires a lot of experience of the user and time to make non-destructive testing useful and competitive in the society. Getting all the pieces together it is a powerful tool that hopefully is a sustainable asset in the future, regarding both economic and environmental issues.

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Weaver, Andrew Ronald. "Correlation of non-destructive pavement test devices." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0030/MQ65526.pdf.

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Höglund, Kristofer. "Non-destructive Testing Using Thermographic Image Processing." Thesis, Linköpings universitet, Datorseende, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-89862.

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In certain industries, quality testing is crucial, to make sure that the components being manufactured do not contain any defects. One method to detect these defects is to heat the specimen being inspected and then to study the cooling process using infrared thermography. The explorations of non-destructive testing using thermography is at an early stage and therefore the purpose of this thesis is to analyse some of the existing techniques and to propose improvements. A test specimen containing several different defects was designed specifically for this thesis. A flash lamp was used to heat the specimen and a high-speed infrared camera was used to study both the spatial and temporal features of the cooling process. An algorithm was implemented to detect anomalies and different parameter settings were evaluated. The results show that the proposed method is successful at finding the searched for defects, and also outperforms one of the old methods.

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Colla, Camilla. "Non-destructive testing of masonry arch bridges." Thesis, University of Edinburgh, 1997. http://hdl.handle.net/1842/12165.

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Stone masonry arch bridges form a critical part of the transportation system. Present methods of assessment are sometimes too conservative and a number of bridges fail the assessment even though they appear in good condition. Non-Destructive Testing can play a key role and three Non-Destructive techniques - radar, sonics and conductivity measurements- are proposed for bridge testing with the aim of obtaining structural dimensions, material characteristics and integrity information which would lead to a more accurate assessment of the structural conditions being made. After discussing problems and limitations with current analytical and load testing methods of assessment, a review of archetypal forms of bridge construction methods employed along the centuries ismade, showing that a greater variety of bridges than commonly believed, exists. The review also enables an Engineer to have some indication of construction type relating to the area, era and designer. The work then includes site work on two masonry bridges and laboratory experiments. On site, the three Non-Destructive Techniques mentioned were used for testing two Scottish stone masonry bridges (one with a brick arch ring) with the aim of obtaining information about the condition and nature of the materials in the fill, the internal configuration of the structure and the geometrical dimensions of the elements. Data from each technique were plotted in the form of cross-sectional tomographic maps and the results interpreted and compared. Limitations are also discussed. In the laboratory, experiments with radar were undertaken to calibrate the technique in controlled conditions and also, and more importantly, to obtain information about phenomena of signal behaviour and material properties as would be found in a masonry arch bridge. The findings served the purpose of aiding a better planning of radar surveys to be made and an improved understanding and interpretation of the radar data to be obtained.

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Kang, Bu Byoung. "Excitation method for thermosonic non-destructive testing." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/1411.

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Thermosonics is a non-destructive testing method in which cracks in an object are made visible through the local generation of heat caused by friction and/or stress concentration. The heat is generated through the dissipation of mechanical energy at the crack interfaces by vibration. The temperature rise around the area close to the crack is measured by a high-sensitivity infrared imaging camera whose field of view covers a large area. The method therefore covers a large area from a single excitation position so it can provide a rapid and convenient inspection technique for structures with complex geometry and small and closed cracks. An ultrasonic horn, originally designed for welding, has generally been used for thermosonic testing. However, it is diffcult to obtain reproducible and controllable excitation with the existing horn system because of non-linearity in the coupling; surface damage can also be produced by chattering caused by loss of contact between the tip of the horn and the structure. Therefore, the general aim of the study was to develop a reliable and convenient excitation method that should excite sufficient vibration for the detection of the defects of interest at all relevant positions in the structure and must also avoid surface damage. In this thesis, a numerical and experimental study for the development of the ex- citation method for reliable thermosonic testing is presented. Successful excitation methods for the detection of delaminations in composites and cracks in metal struc- tures are described. A simple, small wax-coupled PZT exciter is introduced as a con- venient, reliable thermosonic test system in applications where relatively low strain levels are required for damage detection such as composite plates. A reproducible vibration exciter may be su cient for thermosonic testing in some metal structures such as a thin plates. However, higher strain levels are often required in metal structures, though the required strain level is dependent on the crack size. This level of strain is not easily achieved within the reproducible vibration range because of non-linearity in the contact between the exciter and the structure. Therefore, studies are conducted with an acoustic horn with high power capability to investi- gate the characteristics of the vibration produced in a real structure with complex geometry and to develop a excitation method for achieving reliable excitation in the non-linear vibration range for thermosonic testing. An excitation method for a complicated metallic structure such as a turbine blade is also investigated and the in uence of the clamping method and the excitation signal that is input to the horn on the vibration characteristics generated in the testpiece is presented. As a result, a fast narrow band sweep test with a general purpose amplifier and stud coupling is proposed as an excitation method for thermosonic testing. This method can be ap- plied to different types of turbine blades and also to other components. One typical characteristic of a thermosonic test using non-linear vibration is the lack of repeata- bility in the amplitude and the frequency characteristic of the vibration. Therefore, vibration monitoring is necessary for reliable thermosonic testing and a Heating In- dex(HI) has been proposed as a criterion indicating whether su cient vibration is achieved in a tested structure or not. The HI is calculated from different vibration records measured by different sensors and these results are compared in this thesis. A microphone can provide a cheaper and more convenient non-contacting vibration monitoring device than a laser or strain gauge and the heating index calculated by a microphone signal shows similar characteristics to that calculated from the other sensors.

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Книги з теми "Devices of non-destructive testing"

Zoughi, R. Microwave non-destructive testing and evaluation. Dordrecht: Kluwer Academic Publishers, 2000.

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Zoughi, R. Microwave non-destructive testing and evaluation. Dordrecht: Kluwer Academic Publishers, 2000.

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Hull, Barry. Non-destructive testing. London: Macmillan, 1989.

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Vernon, John, ed. Non-destructive testing. Basingstoke: Macmillan Education, 1988.

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Manan, Abd Razak Abd. Non-destructive testing. Manchester: UMIST, 1993.

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Non-destructive testing. 2nd ed. London: E. Arnold, 1991.

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Halmshaw, R. Non-destructive testing. London: Edward Arnold, 1987.

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Hull, Barry, and Vernon John. Non-Destructive Testing. London: Macmillan Education UK, 1988. http://dx.doi.org/10.1007/978-1-349-85982-5.

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Hull, Barry, and Vernon John. Non-Destructive Testing. New York, NY: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4684-6297-5.

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Non-destructive testing. London: E. Arnold, 1987.

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Частини книг з теми "Devices of non-destructive testing"

Leite Cavalcanti, Welchy, Elli Moutsompegka, Konstantinos Tserpes, Paweł H. Malinowski, Wiesław M. Ostachowicz, Romain Ecault, Neele Grundmann, et al. "Integrating Extended Non-destructive Testing in the Life Cycle Management of Bonded Products—Some Perspectives." In Adhesive Bonding of Aircraft Composite Structures, 331–50. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-92810-4_6.

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AbstractIn this chapter, we outline some perspectives on embracing the datasets gathered using Extended Non-destructive Testing (ENDT) during manufacturing or repair process steps within the life cycle of bonded products. Ensuring that the ENDT data and metadata are FAIR, i.e. findable, accessible, interoperable and re-usable, will support the relevant stakeholders in exploiting the contained material-related information far beyond a stop/go decision, while a shorter time-to-information will facilitate a prompter time-to-decision in process and product management. Exploiting the value of ENDT (meta)data will contribute to increased performance by integrating all defined, measured, analyzed and controlled aspects of material transformation across process and company boundaries. This will facilitate the optimization of manufacturing and repair operations, boosting their energy efficiency and productivity. In this regard, some aspects that are currently driving activities in the field of pre-process, in-process and post-process quality assessment will be addressed in the following. Furthermore, some requirements will be contemplated for harmonized and conjoint data transfer ranging from a bonded product’s beginning-of-life through its end-of-life, the customization of stand-alone or linked ENDT tools, and the implementation of sensor arrays and networks in joints, devices and structural parts to gather material-related data during a product’s middle-of-life application phase, thereby fostering structural health monitoring (SHM).

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Bishop, Peter, and Lukasz Cyra. "Overcoming Non-determinism in Testing Smart Devices: A Case Study." In Lecture Notes in Computer Science, 237–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-15651-9_18.

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John, Vernon. "Non-destructive Testing." In Testing of Materials, 90–125. London: Macmillan Education UK, 1992. http://dx.doi.org/10.1007/978-1-349-21969-8_8.

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John, Vernon. "Non-destructive Testing." In Introduction to Engineering Materials, 466–85. London: Palgrave Macmillan UK, 1992. http://dx.doi.org/10.1007/978-1-349-21976-6_30.

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Hull, Barry, and Vernon John. "Ultrasonic Testing." In Non-Destructive Testing, 57–89. London: Macmillan Education UK, 1988. http://dx.doi.org/10.1007/978-1-349-85982-5_5.

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Hull, Barry, and Vernon John. "Ultrasonic Testing." In Non-Destructive Testing, 57–89. New York, NY: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4684-6297-5_5.

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Sukhorukov, V. V. "The Eddy Current Testing Scientific Research — Automatization by CAMAC-devices." In Non-Destructive Testing, 2646–51. Elsevier, 1988. http://dx.doi.org/10.1016/b978-0-08-036221-2.50057-7.

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Maksarov, D. "Software for Optimal Evaluation of Parameters of Eddy Current Non-Destructive Testing Devices." In Non-destructive Testing '92, 327–31. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-89791-6.50071-8.

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Weber, P., Y. Jayet, and B. Pons. "Developments and First Applications of a Pulsed Eddy Current Device for Nondestructive Testing." In Non-Destructive Testing, 2562–71. Elsevier, 1988. http://dx.doi.org/10.1016/b978-0-08-036221-2.50046-2.

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Shimada, Takefumi, and Tadashi Kohida. "Development of device for detecting deterioration of hard-drawn copper stranded wires by eddy current." In Non-destructive Testing '92, 361–65. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-89791-6.50078-0.

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Тези доповідей конференцій з теми "Devices of non-destructive testing"

Shikhov, A. I., and E. N. Dunaeva. "Methods and devices for non-destructive testing." In ТЕНДЕНЦИИ РАЗВИТИЯ НАУКИ И ОБРАЗОВАНИЯ. НИЦ «Л-Журнал», 2018. http://dx.doi.org/10.18411/lj-10-2018-203.

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Nikonova, Galina, Aleksandr Nikonov, Yulia Zakirova, and Valery Makarochkin. "Automated System for Visual Non-Destructive Testing." In 2021 International Seminar on Electron Devices Design and Production (SED). IEEE, 2021. http://dx.doi.org/10.1109/sed51197.2021.9444529.

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Dastjerdi, M. H., M. Rubesam, D. Ruter, J. Himmel, and O. Kanoun. "Non destructive testing for cracks in perforated sheet metals." In 2011 8th International Multi-Conference on Systems, Signals and Devices (SSD 2011). IEEE, 2011. http://dx.doi.org/10.1109/ssd.2011.5767427.

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Zhao, Zhiyi, Yihua Hu, Yao-Chun Shen, Chengmin Li, Wuhua Li, and Weifeng Hu. "LF-OCT Based Non-Destructive Testing for IGBT Module." In 2018 1st Workshop on Wide Bandgap Power Devices and Applications in Asia (WiPDA Asia). IEEE, 2018. http://dx.doi.org/10.1109/wipdaasia.2018.8734660.

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Carpignano, F., S. Surdo, G. Barillaro, and S. Merlo. "Optical low-coherence reflectometry for non-destructive testing of silicon micromachined devices." In 18th Italian National Conference on Photonic Technologies (Fotonica 2016). Institution of Engineering and Technology, 2016. http://dx.doi.org/10.1049/cp.2016.0908.

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Kim, YoungChae, JungHwa Shin, JeongTack Lim, WonDo Lee, HuiSeog Jeong, and GwanSoo Park. "Design of Spider-type Non-Destructive Testing Device Using Magnetic Flux Leakage." In 2019 Student Conference on Electric Machines and Systems (SCEMS 2019). IEEE, 2019. http://dx.doi.org/10.1109/scems201947376.2019.8972502.

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He, Yuanfeng, and Wenwu Zhang. "Review on the Development of Non-Destructive Testing Based on Laser Ultrasonic Technique." In ASME 2014 International Manufacturing Science and Engineering Conference collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/msec2014-4066.

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Development of industry demands better performance of equipments and devices than ever. The property of material used to produce the equipments is the precondition to ensure the quality. As equipments are usually required to be integral during the quality inspection, non-destructive testing (NDT) plays an increasingly import role in modern industry quality control. Different NDT methods are introduced and analyzed. The mechanism of ultrasonic exciting is described. After the ultrasonic is excited, the vibration signal can be detected by transducer or optical method which are then illustrated. In the section of development of laser ultrasonic technology, contributions made by various researchers in theoretic development, experiment, simulation and application are introduced and the corresponding content of the researches as well. The conclusion and the outlook of laser ultrasonic technique is made at the last.

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Burkov, Mikhail, Pavel Lyubutin, Anton Byakov, and Sergey Panin. "Development of high resolution shearography device for non-destructive testing of composite materials." In ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4932719.

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Hu, Chaoxu, Shiwei Feng, Xin He, Kun Bai, and Sheng Wang. "Non-destructive testing of heteromorphic workpiece brazing layer quality based on heat conduction." In 2021 4th International Conference on Electron Device and Mechanical Engineering (ICEDME). IEEE, 2021. http://dx.doi.org/10.1109/icedme52809.2021.00014.

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Heyes, A. L., J. P. Feist, X. Chen, Z. Mutasim, and J. R. Nicholls. "Optical Non-Destructive Condition Monitoring of TBC’s." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-28114.

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The paper describes recent developments of the thermal barrier sensor concept for non-destructive evaluation (NDE) of thermal barrier coatings and on-line condition monitoring in gas turbines. Increases in turbine inlet temperature in pursuit of higher efficiency will make it necessary improve or upgrade current thermal protection systems in gas turbines. As these become critical to safe operation it will also be necessary to devise techniques for online conditions monitoring and NDE. The authors have proposed thermal barrier sensor coatings (TBSC) as a possible means of achieving NDE for thermal barrier coatings. TBSC’s are made by doping the ceramic material (currently yttria stabilised zirconia) with a rare earth activator to provide the coating with luminescence when excited with UV light. The paper describes the physics of the thermo-luminescent response of such coatings and shows how this can be used to measure temperature. Calibration data is presented along with the results of comparative thermal cycle testing of TBSC’s, produced using a production standard APS system. The latter show the durability of TBSC’s to be similar to that of standard YSZ TBC’s and indicate that the addition of the rare-earth dopant is not detrimental to the coating. Also discussed is the manufacture of functionally structured coatings with discreet doped layers. The temperature at the bond coat interface is important with respect to the life of the coating since it influences the growth rate of the thermally grown oxide layer which in turn destabilises the coating system as it becomes thicker. Experimental data is presented indicating that duallayered TBSC’s can be used to detect luminescence from, and thereby the temperature within, sub surface layers covered by as much as 500μm of standard TBC material. A theoretical analysis of the data has allowed some preliminary calculations of the transmission properties of the overcoat to be made and these suggest that it might be possible to observe phosphorescence and measure temperature through an overcoat layer of up to approximately 1.56mm thickness.

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Звіти організацій з теми "Devices of non-destructive testing"

Galili, Naftali, Roger P. Rohrbach, Itzhak Shmulevich, Yoram Fuchs, and Giora Zauberman. Non-Destructive Quality Sensing of High-Value Agricultural Commodities Through Response Analysis. United States Department of Agriculture, October 1994. http://dx.doi.org/10.32747/1994.7570549.bard.

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The objectives of this project were to develop nondestructive methods for detection of internal properties and firmness of fruits and vegetables. One method was based on a soft piezoelectric film transducer developed in the Technion, for analysis of fruit response to low-energy excitation. The second method was a dot-matrix piezoelectric transducer of North Carolina State University, developed for contact-pressure analysis of fruit during impact. Two research teams, one in Israel and the other in North Carolina, coordinated their research effort according to the specific objectives of the project, to develop and apply the two complementary methods for quality control of agricultural commodities. In Israel: An improved firmness testing system was developed and tested with tropical fruits. The new system included an instrumented fruit-bed of three flexible piezoelectric sensors and miniature electromagnetic hammers, which served as fruit support and low-energy excitation device, respectively. Resonant frequencies were detected for determination of firmness index. Two new acoustic parameters were developed for evaluation of fruit firmness and maturity: a dumping-ratio and a centeroid of the frequency response. Experiments were performed with avocado and mango fruits. The internal damping ratio, which may indicate fruit ripeness, increased monotonically with time, while resonant frequencies and firmness indices decreased with time. Fruit samples were tested daily by destructive penetration test. A fairy high correlation was found in tropical fruits between the penetration force and the new acoustic parameters; a lower correlation was found between this parameter and the conventional firmness index. Improved table-top firmness testing units, Firmalon, with data-logging system and on-line data analysis capacity have been built. The new device was used for the full-scale experiments in the next two years, ahead of the original program and BARD timetable. Close cooperation was initiated with local industry for development of both off-line and on-line sorting and quality control of more agricultural commodities. Firmalon units were produced and operated in major packaging houses in Israel, Belgium and Washington State, on mango and avocado, apples, pears, tomatoes, melons and some other fruits, to gain field experience with the new method. The accumulated experimental data from all these activities is still analyzed, to improve firmness sorting criteria and shelf-life predicting curves for the different fruits. The test program in commercial CA storage facilities in Washington State included seven apple varieties: Fuji, Braeburn, Gala, Granny Smith, Jonagold, Red Delicious, Golden Delicious, and D'Anjou pear variety. FI master-curves could be developed for the Braeburn, Gala, Granny Smith and Jonagold apples. These fruits showed a steady ripening process during the test period. Yet, more work should be conducted to reduce scattering of the data and to determine the confidence limits of the method. Nearly constant FI in Red Delicious and the fluctuations of FI in the Fuji apples should be re-examined. Three sets of experiment were performed with Flandria tomatoes. Despite the complex structure of the tomatoes, the acoustic method could be used for firmness evaluation and to follow the ripening evolution with time. Close agreement was achieved between the auction expert evaluation and that of the nondestructive acoustic test, where firmness index of 4.0 and more indicated grade-A tomatoes. More work is performed to refine the sorting algorithm and to develop a general ripening scale for automatic grading of tomatoes for the fresh fruit market. Galia melons were tested in Israel, in simulated export conditions. It was concluded that the Firmalon is capable of detecting the ripening of melons nondestructively, and sorted out the defective fruits from the export shipment. The cooperation with local industry resulted in development of automatic on-line prototype of the acoustic sensor, that may be incorporated with the export quality control system for melons. More interesting is the development of the remote firmness sensing method for sealed CA cool-rooms, where most of the full-year fruit yield in stored for off-season consumption. Hundreds of ripening monitor systems have been installed in major fruit storage facilities, and being evaluated now by the consumers. If successful, the new method may cause a major change in long-term fruit storage technology. More uses of the acoustic test method have been considered, for monitoring fruit maturity and harvest time, testing fruit samples or each individual fruit when entering the storage facilities, packaging house and auction, and in the supermarket. This approach may result in a full line of equipment for nondestructive quality control of fruits and vegetables, from the orchard or the greenhouse, through the entire sorting, grading and storage process, up to the consumer table. The developed technology offers a tool to determine the maturity of the fruits nondestructively by monitoring their acoustic response to mechanical impulse on the tree. A special device was built and preliminary tested in mango fruit. More development is needed to develop a portable, hand operated sensing method for this purpose. In North Carolina: Analysis method based on an Auto-Regressive (AR) model was developed for detecting the first resonance of fruit from their response to mechanical impulse. The algorithm included a routine that detects the first resonant frequency from as many sensors as possible. Experiments on Red Delicious apples were performed and their firmness was determined. The AR method allowed the detection of the first resonance. The method could be fast enough to be utilized in a real time sorting machine. Yet, further study is needed to look for improvement of the search algorithm of the methods. An impact contact-pressure measurement system and Neural Network (NN) identification method were developed to investigate the relationships between surface pressure distributions on selected fruits and their respective internal textural qualities. A piezoelectric dot-matrix pressure transducer was developed for the purpose of acquiring time-sampled pressure profiles during impact. The acquired data was transferred into a personal computer and accurate visualization of animated data were presented. Preliminary test with 10 apples has been performed. Measurement were made by the contact-pressure transducer in two different positions. Complementary measurements were made on the same apples by using the Firmalon and Magness Taylor (MT) testers. Three-layer neural network was designed. 2/3 of the contact-pressure data were used as training input data and corresponding MT data as training target data. The remaining data were used as NN checking data. Six samples randomly chosen from the ten measured samples and their corresponding Firmalon values were used as the NN training and target data, respectively. The remaining four samples' data were input to the NN. The NN results consistent with the Firmness Tester values. So, if more training data would be obtained, the output should be more accurate. In addition, the Firmness Tester values do not consistent with MT firmness tester values. The NN method developed in this study appears to be a useful tool to emulate the MT Firmness test results without destroying the apple samples. To get more accurate estimation of MT firmness a much larger training data set is required. When the larger sensitive area of the pressure sensor being developed in this project becomes available, the entire contact 'shape' will provide additional information and the neural network results would be more accurate. It has been shown that the impact information can be utilized in the determination of internal quality factors of fruit. Until now,

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Le Bas, Pierre-Yves. Non-Linear Acoustics for Non-Destructive testing. Office of Scientific and Technical Information (OSTI), October 2019. http://dx.doi.org/10.2172/1569728.

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Mills, Bernice E. Non destructive testing of test objects. Office of Scientific and Technical Information (OSTI), October 2007. http://dx.doi.org/10.2172/926791.

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Bruins, Henderikus B. Non Destructive Seal Testing Polymeric Tray. Fort Belvoir, VA: Defense Technical Information Center, October 2006. http://dx.doi.org/10.21236/ada468022.

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Wei, T., N. Zavaljevski, S. Bakhtiari, A. Miron, and D. Jupperman. Automated Non-Destructive Testing Array Evaluation System. Office of Scientific and Technical Information (OSTI), December 2004. http://dx.doi.org/10.2172/837752.

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BERNDT, M. L. NON-DESTRUCTIVE TESTING METHODS FOR GEOTHERMAL PIPING. Office of Scientific and Technical Information (OSTI), March 2001. http://dx.doi.org/10.2172/777718.

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Migliori, A., and T. W. Darling. Resonant ultrasound spectroscopy for materials studies and non-destructive testing. Office of Scientific and Technical Information (OSTI), September 1995. http://dx.doi.org/10.2172/109622.

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Umstadter, Donald, and Sudeep Banerjee. High-Energy Laser for Detection, Inspection, and Non-Destructive Testing. Fort Belvoir, VA: Defense Technical Information Center, March 2011. http://dx.doi.org/10.21236/ada547042.

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Bora, Mihail, and Ryan Desharnais. Non-Destructive Testing of Water in PV Modules, CRADA TC02255. Office of Scientific and Technical Information (OSTI), December 2018. http://dx.doi.org/10.2172/1495221.

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Zoldners, N. G., and J. A. Soles. An annotated bibliography of non-destructive testing of concrete: 1975-1984. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/305035.

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