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Academic literature on the topic 'Contactless method'

Author: Grafiati

Published: 4 June 2025

Last updated: 15 July 2025

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Journal articles on the topic "Contactless method"

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Rinkunas, R., and S. Kuskevicius. "Contactless method of resistance measurement." Technical Physics 54, no. 1 (2009): 133–37. http://dx.doi.org/10.1134/s1063784209010204.

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Ricca, A., and S. Zannella. "Contactless method for magnetoresistivity measurements." IEEE Transactions on Magnetics 23, no. 2 (1987): 1422–24. http://dx.doi.org/10.1109/tmag.1987.1065114.

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Nowak, Marian, Marcin Jesionek, Barbara Solecka, Piotr Szperlich, Piotr Duka, and Anna Starczewska. "Contactless photomagnetoelectric investigations of 2D semiconductors." Beilstein Journal of Nanotechnology 9 (October 25, 2018): 2741–49. http://dx.doi.org/10.3762/bjnano.9.256.

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Background: Applications of two-dimensional (2D) materials in electronic devices require the development of appropriate measuring methods for determining their typical semiconductor parameters, i.e., mobility and carrier lifetime. Among these methods, contactless techniques and mobility extraction methods based on field-effect measurements are of great importance. Results: Here we show a contactless method for determining these parameters in 2D semiconductors that is based on the photomagnetoelectric (PME) effect (also known as the photoelectromagnetic effect). We present calculated dependences of the PME magnetic moment, evoked in 2D Corbino configuration, on the magnetic field as well as on the intensity and spatial distribution of illumination. The theoretical predictions agree with the results of the contactless investigations performed on non-suspended single-layer graphene. We use the contactless PME method for determining the dependence of carrier mobility on the concentration of electrons and holes induced by a back-gate voltage. Conclusion: The presented contactless PME method, used in Corbino geometry, is complementary to the mobility extraction methods based on field-effect measurements. It can be used for determining the mobility and diffusion length of carriers in different 2D materials.

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Kaldre, I., A. Bojarevics, T. Beinerts, et al. "Contactless electromagnetic method for aluminium degassing." IOP Conference Series: Materials Science and Engineering 424 (October 13, 2018): 012057. http://dx.doi.org/10.1088/1757-899x/424/1/012057.

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Latukhina, Natalya V., Svetlana P. Kobeleva, G. A. Rogozhina, I. A. Shishkin, and Ivan V. Schemerov. "Contact and contactless porous silicon parameter measurement techniques." Modern Electronic Materials 4, no. (4) (2018): 143–50. https://doi.org/10.3897/j.moem.4.4.39503.

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In this work we have used contact and contactless techniques to measure the electrical resistivity of single crystal silicon wafers with porous layers of variable thickness synthesized on the surface. The porous layers have been synthesized on the surfaces of single crystal wafers with well pronounced microroughness pattern, either textured or grinded. We have used the classic four-probe method with a linear probe arrangement as the contact measurement technique, and the resonance microwave method based on microwave absorption by free carriers as the contactless measurement technique. Electrical resistivity distribution over the specimen surface has been mapped based on the measurement results. We have demonstrated a general agreement between the electrical resistivity distribution patterns as measured using the contact and contactless measurement techniques. To analyze the electrical resistivity scatter over the specimen surface area we have simulated the field distribution in the electrolyte during porous layer formation in a non-planar anode cell. The regularities of the electrical resistivity spatial distribution in different types of specimens are accounted for by specific porosity formation mechanisms which in turn are controlled by the initial microroughness pattern and the field distribution pattern in the electrolyte for each specific case.

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Hu, Qing, Jie Huang, and Yu Ping Qui. "Contactless Power Supply System Design Based on DSP." Applied Mechanics and Materials 278-280 (January 2013): 1039–42. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.1039.

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Research on contactless power supply technique based on detachable transformer was developed, realized contactless power delivery to apparatus with no electrical connection or physical contact by the perfect combination of inductive coupling technique and power electronics,which eliminated the risk of electric shock, short circuit,or sparking. Used DSP chip and power technology had designed contactless power supply system. Experiments had showed that the system circuit could achieve contactless power transmission system control requirements. The method in solving the contactless power transmission issues has good practical value and application prospect.

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Grigor’ev, A. V., A. V. Zatylkin, and N. K. Yurkov. "Method for Contactless Three-Component Vibration Measurement." Measurement Techniques 59, no. 12 (2017): 1291–96. http://dx.doi.org/10.1007/s11018-017-1131-5.

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Mordasov, M. M., A. P. Savenkov, M. E. Safonova, and V. A. Sychev. "Contactless Method of Measurement of Surface Tension." Measurement Techniques 61, no. 6 (2018): 613–20. http://dx.doi.org/10.1007/s11018-018-1473-7.

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Message, C. A., J. V. Stadelmann, and I. N. Spiridonov. "Method for Contactless Measurement of Gait Parameters." Biomedical Engineering 49, no. 5 (2016): 292–94. http://dx.doi.org/10.1007/s10527-016-9551-0.

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Chumakov, V. V. "A contactless measurement method for precision items." Measurement Techniques 33, no. 10 (1990): 973–74. http://dx.doi.org/10.1007/bf00990508.

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Dissertations / Theses on the topic "Contactless method"

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Haque, Md Ashraful. "Corona Induced Electrohydrodynamics: A Contactless Method to Manipulate Liquids." University of Toledo / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1547224208781492.

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Šutinys, Ernestas. "The investigation of wire rope defect using contactless dynamic method." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140129_143028-76534.

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The dissertation investigates the diagnostics of wire rope by using forced characteristics. The main object of research is defects of prestressed ropes using a dynamic systems characteristic. The primary purpose of this dissertation is to research the characteristics of a prestressed rope with outside of broken wire and to create research methodology of broken wires and determine its location. The paper approaches a few major tasks such as by experiment detecting the dynamic characteristics of the wire rope and detection broken wire on the surface of the wire rope using dynamic characteristics. Task 1 is formulated as the literature review found that the wire rope defects detected by using of the dynamic characteristics received little attention. Task 2 relates to the first problem solution, as measured by vibrating amplitude of broken wire, it is important to assess the reliability of measuring instruments. The introduction reveals the investigated problem, importance of the thesis and the object of research and describes the purpose and tasks of the paper, research methodology, scientific novelty, the practical significance of results examined in the paper and defended statements. The introduction ends in presenting the author’s publications on the subject of the defended dissertation, offering the material of made presentations in conferences and defining the structure of the dissertation. Chapter 1 analysis used literature. It contains a wire rope defects and diagnostic... [to full text]<br>Disertacijoje nagrinėjama plieninių lynų defektų nustatymas taikant jėgines charakteristikas. Pagrindinis tyrimo objektas yra įtemptų plieninių lynų defektų nustatymas naudojant lyno, kaip dinaminės sistemos, savybes. Pagrindinis disertacijos tikslas – ištirti įtempto plieninio lyno su išoriniame sluoksnyje nutrūkusiomis vielomis savybes ir sukurti nutrūkusių vielų bei jų vietos nustatymo tyrimų metodiką. Darbe sprendžiami keli pagrindiniai uždaviniai: eksperimentiškai nustatytos plieninio lyno dinaminės charakteristikos ir naudojant jas aptinkamos įtempto plieninio lyno paviršiuje nutrūkusios vielos buvimo vieta. Pirmasis uždavinys suformuluotas, nes atlikus literatūros apžvalgą nustatyta, kad plieninių lynų defektams aptikti naudojant dinamines charakteristikas skirta mažai dėmesio. Antrasis siejasi su pirmojo uždavinio sprendimu, nes kai matuojamos virpančios nutrūkusios vielos amplitudės, labai svarbu įvertinti matavimo priemonių patikimumą. Disertaciją sudaro įvadas, trys skyriai, rezultatų apibendrinimas, naudotos literatūros ir autoriaus publikacijų disertacijos tema sąrašai. Įvadiniame skyriuje aptariama tiriamoji problema, darbo aktualumas, aprašomas tyrimų objektas, formuluojamas darbo tikslas bei uždaviniai, aprašoma tyrimų metodika, darbo mokslinis naujumas, darbo rezultatų praktinė reikšmė, ginamieji teiginiai. Įvado pabaigoje pristatomos disertacijos tema autoriaus paskelbtos publikacijos ir pranešimai konferencijose bei disertacijos struktūra. Pirmasis skyrius... [toliau žr. visą tekstą]

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Gursoy, Doga. "Multi-frequency Contactless Electrical Impedance Imaging Using Realistic Head Models: Single Coil Simulations." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608201/index.pdf.

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Contactless electrical impedance imaging technique is based upon the measurement of secondary electromagnetic fields caused by induced currents inside the body. In this study, a circular single-coil is used as a transmitter and a receiver. The purpose of this study is twofold: (1) to solve the induced current density distribution inside the realistic head model resulting from a sinusoidal excitation, (2) to calculate the impedance change of the same coil from the induced current distribution inside the head model. The Finite Difference Method is used to solve the induced current density in the head. The realistic head model is formed by seven tissues with a 1 mm resolution. The electrical properties of the model are assigned as a function of frequency. The quasi-stationary assumptions, especially for head tissues, are explored. It is shown that, numerical solution of only the scalar potential is sufficient to obtain the induced current density in the head below 10 MHz operating frequency. This simplification not only reduce the excessive size of the solution domain, but also reduces the number of unknowns by a factor of 4. For higher frequencies (depending on the application) induction and propagation effects become important. Additionally it is observed that dynamic monitoring of hemorrhage at any frequency seems feasible. It is concluded that the methodology provides useful information about the electrical properties of the human head via contactless measurements and has a potent as a new imaging modality for different clinical applications.

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Meesala, Vamsi Chandra. "Nonlinear Effects in Contactless Ultrasound Energy Transfer Systems." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/101752.

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Ultrasound acoustic energy transfer (UAET) is an emerging contactless technology that offers the capability to safely and efficiently power sensors and devices while eliminating the need to replace batteries, which is of interest in many applications. It has been proposed to recharge and communicate with implanted medical devices, thereby eliminating the need for invasive and expensive surgery and also to charge sensors inside enclosed metal containers typically found in automobiles, nuclear power plants, space stations, and aircraft engines. In UAET, energy is transferred through the reception of acoustic waves by a piezoelectric receiver that converts the energy of acoustic waves to electrical voltage. It has been shown that UAET outperforms the conventional CET technologies that use electromagnetic waves to transfer energy, including inductive coupling and capacitative coupling. To date, the majority of research on UAET systems has been limited to modeling and proof-of-concept experiments, mostly in the linear regime, i.e., under small levels of acoustic pressure that result in small amplitude longitudinal vibrations and linearized piezoelectricity. Moreover, existing models are based on the "piston-like" deformation assumption of the transmitter and receiver, which is only accurate for thin disks and does not accurately account for radiation effects. The linear models neglect nonlinear effects associated with the nonlinear acoustic wave propagation as well as the receiver's electroelastic nonlinearities on the energy transfer characteristics, which become significant at high source strengths. In this dissertation, we present experimentally-validated analytical and numerical multiphysics modeling approaches aimed at filling a knowledge gap in terms of considering resonant acoustic-piezoelectric structure interactions and nonlinear effects associated with high excitation levels in UAET systems. In particular, we develop a reduced-order model that can accurately account for the radiation effects and validate it by performing experiments on four piezoelectric disks with different aspect ratios. Next, we study the role of individual sources of nonlinearity on the output power characteristics. First, we consider the effects of electroelastic nonlinearities. We show that these nonlinearities can shift the optimum load resistance when the acoustic medium is fluid. Next, we consider the nonlinear wave propagation and note that the shock formation is associated with the dissipation of energy, and as such, shock formation distance is an essential design parameter for high-intensity UAET systems. We then present an analytical approach capable of predicting the shock formation distance and validate it by comparing its prediction with finite element simulations and experimental results published in the literature. Finally, we experimentally investigate the effects of both the nonlinearity sources on the output power characteristics of the UAET system by considering a high intensity focused ultrasound source and a piezoelectric disk receiver. We determine that the system's efficiency decreases, and the maximum voltage output position drifts towards the source as the source strength is increased.<br>Doctor of Philosophy<br>Advancements in electronics that underpinned the development of low power sensors and devices have transformed many fields. For instance, it has led to the innovation of implanted medical devices (IMDs) such as pacemakers and neurostimulators that perform life-saving functions. They also find applications in condition monitoring and wireless sensing in nuclear power plants, space stations, automobiles and aircraft engines, where the sensors are enclosed within sealed metal containers, vacuum/pressure vessels or located in a position isolated from the operator by metal walls. In all these applications, it is desired to communicate with and recharge the sensors wirelessly. Such a mechanism can eliminate the need for invasive and expensive surgeries to replace batteries of IMDs and preserve the structural integrity of metal containers by eliminating the need for feed through wires. It has been shown that ultrasound acoustic energy transfer (UAET) outperforms conventional wireless power transfer techniques. However, existing models are based on several assumptions that limit their potential and do not account for effects that become dominant when a higher output power is desired. In this dissertation, we present experimentally validated numerical and theoretical investigations to fill those knowledge gaps. We also provide crucial design recommendations based on our findings for the efficient implementation of UAET technology.

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Sahlman, Alex, and Henry Zhang. "Nästa steg i betalningsbranschensutveckling? : En kvalitativ studie om kontaktlösbetalningsmetod ur ett bankperspektiv." Thesis, Södertörns högskola, Institutionen för samhällsvetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-30754.

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Syftet med denna studie var att undersöka framtidsutsikter och utmaningar för kontaktlös betalningsmetod som är NFC-baserad. Detta mynnade ut i frågor som undersökte kring varför enbart ett fåtal banker valt att satsa på kontaktlösa betalkort, vilka utmaningar som NFC-baserade betalningar står inför i den svenska marknaden och även vilka framtidsutsikter den kontaktlösa betalningsmetoden har i den svenska betalningsbranschen. För att svara på dessa frågor, tillämpades en kvalitativ fallstudie med semistrukturerade intervjuer. Två respondenter från varsin bank som infört kontaktlös betalningsmetod i Sverige intervjuades, likaså en respondent från en bank som inte hade infört kontaktlös betalningsmetod i Sverige och ytterligare två respondenter från en annan bank som inte infört kontaktlösa betalningsmetoder i Sverige. Utöver detta, intervjuades även en forskare från Sveriges riksbank och en konsult som arbetar inom ett forum för kontaktlös betalningsmetod. Studien påvisade att anledningen till att ett fåtal banker erbjudit kontaktlös betalningsmetod till sina kunder var till följd av att Sverige varit relativt sena med att byta från magnetremsa som betalningsmetod till chip och PIN, vilket gjort att man ogärna investerade i kontaktlös betalningsmetod. Utmaningar som kontaktlös betalningsmetod står inför är att se till att infrastrukturen utökas i Sverige samt informera kunder om kontaktlös betalningsmetod. Framtidsutsikterna för kontaktlös betalningsmetod är positiva och tanken bland flera aktörer är att kontaktlös betalningsmetod ska vara väldigt utbrett i Sverige år 2020.<br>The purpose of this research was to investigate future prospects and challenges regarding contactless payment method which is based on NFC. These lead to the formulation of questions which researched why only a few banks had chosen to employ contactless payment cards, which challenges that NFC-based payments are facing in the Swedish market, and also which future prospects the contactless payment method has in the Swedish payment market. In order to answer these questions, a qualitative case study with semi-structured interviews was utilized. Interviews were conducted with two respondents from respective banks which had introduced contactless payment in Sweden while additional interviews were conducted with one respondent from a bank which had not introduced contactless payment in Sweden and two respondents from another bank which had not introduced contactless payment methods in Sweden. In addition to this, one respondent from the central bank of Sweden and one consultant working within a forum regarding contactless payment have been interviewed. The study showed that the reason to why few banks have offered contactless payment method to their customers was due to that Sweden had been relatively late in regards to changing from magnetic strip as a payment method to chip and PIN, which resulted in that the market participants did not wish to invest in the contactless payment method. Challenges which the contactless payment method is facing, is to make sure that the infrastructure will be increased in Sweden, and inform customers about the contactless payment method. The future prospects for the contactless payment methods are positive and the intention among several market participants is that the contactless payment method will be very widespread in Sweden 2020.

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Xu, Ye. "Kilowatt Three-phase Rotary Transformer Design for Permanent Magnet DC Motor with On-rotor Drive System." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-27781.

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The aim of this thesis is to design a kilowatt three-phase step-down rotary transformer for a permanent magnet DC motor. The permanent magnet DC motor has an on-rotor drive system, and therefore requiring a power supply that can transfer power to its drive unit without mechanical contact. The rotary transformer has a detached magnetic coupling structure that qualifies it as a potential method for the wireless power transfer. This thesis studies the rotary transformer as a static device, focusing on its core loss. By using a transient finite element analysis of COMSOL Multiphysics and an iron loss prediction model, the rotary transformer was optimized in terms of efficiency and power density for the on-rotor drive system through proper material selection and geometry exploration. After this, a mechanical design, which based on a literature review of the influences of manufacturing processes on electrical steels, was proposed for realizing the core fabrication and the rotary transformer assembly. The results show that the rotary transformer can step down 400 V/50 Hz three-phase voltage to 13.15V in a Delta-wye connection and output 1.17kW power over an air-gap of 0.3mm with 95.94% overall efficiency. The proposed mechanical design enables the transformer to minimize the core loss and the manufacturing cost. Without using resonant inductive coupling, this transformer design simplifies the power supply for the motor, thereby decreasing the motor manufacturing and maintenance cost.

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Кім, А. А. "Інноваційні технології управління ресторанним бізнесом". Thesis, Одеський національний економічний університет, 2020. http://dspace.oneu.edu.ua/jspui/handle/123456789/12528.

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У роботі розглядаються теоретичні основи технології управління в системі суб’єктів бізнесу. Визначено компоненти та складові інноваційних рішень в ресторанному бізнесі. Проаналізовано тенденції розвитку ресторанного бізнесу та виявлено основні фактори, які впливають на розвиток ресторанного бізнесу під час пандемії. Проаналізовано інноваційні можливості розвитку ресторанного бізнесу та обґрунтовано інноваційний напрям розвитку сервісу доставки ресторану, та доцільність інноваційної технології безконтактних розрахунків за QR-кодом.<br>The paper considers the basics of management technology in the system of business entities. The components and components of innovative solutions in the restaurant business are defined. Analyze trends in the restaurant business and identify the main factors influencing the development of the restaurant business during a pandemic. Analyze the innovative opportunities for the development of the restaurant business and justify the innovative direction of development of the restaurant delivery service, and the feasibility of innovative technology of contactless payments by QRcode.

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Vidal, Denis Tadeu Rajh. "Investigação por eletroforese capilar com detecção condutométrica sem contato sobre a formação e as propriedades de monoalquil carbonatos em meio aquoso." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-31012012-153743/.

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A formação dos monoalquil carbonatos (MACs) em meio aquoso - produzidos pela reação de um álcool e bicarbonato foi investigada por eletroforese capilar (CE) com detecção condutométrica sem contato (C4D). Foram estudadas ao todo 29 substâncias, das quais 25 apresentaram formação de adutos aniônicos monocarregados e 2 delas, adutos aniônicos com dupla carga. A eletroforese capilar proporcionou a obtenção de medidas de propriedades físico-químicas. Através do tempo de migração, foram obtidos mobilidade, coeficiente de difusão e raio iônico hidratado. Para os n-álcoois de 1 a 5 átomos de carbono, os adutos apresentaram raio iônico hidratado entre 216 pm e 310 pm. Os MACs têm raio iônico proporcional ao do álcool gerador, sendo sistematicamente maiores devidos à anexação do grupo carbonato. Quando comparado a ácidos carboxílicos de cadeia carbônica similar, os MACs possuem menor raio iônico hidratado. A obtenção dos valores da cinética de formação e hidrólise foi possível pela utilização de dupla detecção condutométrica, a qual permitia determinar a concentração do MAC em dois momentos diferentes ao longo da coluna. Devido à impossibilidade de uma calibração direta - já que os sais de MACs se decompõem em água - foi introduzida uma nova técnica de calibração que dispensa o uso de uma solução padrão do analito em favor de uma com espécie de mobilidade similar. As constantes cinética e termodinâmica foram comparadas com aquelas disponíveis na literatura, mostrando boa concordância, como no caso dos adutos para o metanol e etanol (a 25 ºC em meio aquoso), cujos valores da constante termodinâmica sugeridos pela literatura são de 3,57 e 1,80, respectivamente, enquanto que os valores calculados em nosso trabalho são de 4,2 e 2,3, a 25ºC. De forma similar ao ácido carbônico, os ácidos alquilcarbônicos (ACAs) se decompõem em meio ácido, o que dificulta a determinação da verdadeira constante de dissociação. Ainda assim, estudos em pH de 3 a 9, permitiram estimar os valores de pKa dos ácidos derivados de metanol, etanol e propanol como estando algo abaixo de 4, o que estaria em acordo com o valor de 3,6 do ácido carbônico. A formação de MACs também foi observada para dióis, como o etileno glicol e polióis, como o glicerol e manitol. Foi também possível observar, por eletroforese capilar, a formação de adutos aniônicos monovalentes para açúcares, tais como a sacarose, glicose e frutose. Por fim, a pesquisa revelou a possibilidade da formação de adutos com dupla carga - os bis(carbonatos) - para alguns dióis: o 1,4-butanodiol e o 1,6-hexanodiol. Esta é a primeira vez que estas espécies foram observadas. Estes resultados sugerem a formação de adutos aniônicos para várias outras classes de compostos, as quais possuam a hidroxila na cadeia carbônica. Embora, em meio predominantemente aquoso, estas espécies não estejam em alta concentração, trata-se de um novo conjunto de espécies a serem consideradas quando se trabalha em condições propícias.<br>The formation of monoalkyl carbonates (MACs) in aqueous medium - resulting from an alcohol and bicarbonate - was investigated by using capillary electrophoresis with capacitively coupled contactless conductivity detection (C4D). Twenty nine substances were studied. The mono-charged anionic adducts were observed for 25 of them and double-charged species were observed for 2. Capillary electrophoresis allowed us to obtain some physical-chemical properties. The migration time was used to calculate the ionic mobility, coefficient of diffusion, and hydrodynamic radius. The radii ranged from 216 to 310 pm for the adducts formed from the n-alcohols of 1 to 5 carbon atoms, respectively. The MACs have radii proportional to the size of the alcohol, being systematically greater because of the attached carbonate group. When compared to carboxylic acids of similar carbonic chain, the MACs have smaller radii. The calculation of the kinetic constants was possible due to the double C4D detection, which allows quantitation of the MAC at two different moments along the capillary. Due to the decomposition of the MAC salt in water, a direct quantitation was not possible. Thus an indirect calibration approach was introduced, where the analyte is substituted by a stable species of similar mobility. Good agreement was obtained between the kinetic and thermodynamic constants obtained by this method and those ones available in literature. For instance, the methanol and ethanol adducts were 4.2 and 2.3 (at 25 ºC), respectively, while the literature\'s values are 3.57 and 1.80. Similarly to carbonic acid, the alkyl carbonic acids (ACAs) decompose in acid medium, which impairs the determination of the dissociation constant. Even so, studies from pH between 3 and 9 allowed us to estimate that the pKa values of the adducts for methanol, ethanol, and propanol are somewhat below 4, which is in agreement with the value 3.6 for the carbonic acid. MACs were also observed for diols and polyols as well as for sugars. Finally, double-charged species bis(carbonates) were formed with 1,4-butanediol and 1,6-hexanediol. This is the first time that these species are reported. Although the concentrations of these species are not high in an aqueous medium, they form a new set of substance to be considered in aqueous solution when the conditions are favorable.

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Lavický, Jiří. "Bezkontaktní měření v procesním inženýrství." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228945.

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The objective of my thesis is description of contactless measuring methods, their principle and distribution. There are compiled basic facts about the measurement of laser and ultrasound. In this work is also described non-contact temperature measurement. Part of thesis is non-contact flow measurement on the model.

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Славков, Віктор Миколайович. "Розробка цифрового фотографічного методу теплового контролю металів при високих температурах". Thesis, НТУ "ХПІ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/17036.

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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 р. Дисертацію присвячено розробці методу теплового контролю металів при температурах понад 600 °С із використанням, у якості детектора теплового випромінювання, цифрового фотоапарата. На основі встановлених теоретичних положень методу розроблені програмні алгоритми обробки цифрових зображень, що дозволили: провести процедуру калібрування цифрового фотоапарата у діапазоні яскравісних температур 500…1800 °С та встановити калібрувальні залежності у вигляді математичних рівнянь; здійснити тепловий контроль металевих пластин, об'ємних металевих зразків та встановити присутні в них дефекти; вирішити додаткові задачі теплового контролю металів, а саме встановити значення питомої масової теплоємності металу; моделювати рівномірні температурні поля на поверхні металевих пластин; встановити розподілення коефіцієнта теплового випромінювання поверхні металевих пластин.<br>Thesis for granting the Degree of Candidate of Technical sciences in speciality 05.11.13 - devices and methods of testing and materials composition determination. - National Technical University "Kharkiv Politechnical Institute", Kharkiv, 2015. The dissertation is devoted to development of a thermal control metals method at temperatures above 600 °C using as thermal radiation detector, digital camera. On the basis of the established method of theoretical positions were developed software algorithms for digital image processing that allowed: to carry a digital camera calibration brightness temperature in the range of 500...1800 °C and set the calibration curve in the form of mathematical equations; perform thermal control of metal plates, bulk metallic samples and established the presence of defects; to solve additional tasks of thermal metals control, namely to establish the value of the specific heat capacity of the metal mass; simulate uniform temperature field on the surface of the metal plates; determine the distribution coefficient of thermal radiation from the metal plates surface.

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Books on the topic "Contactless method"

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W, Palosz, and United States. National Aeronautics and Space Administration., eds. Characterization of cadmium-zinc telluride crystals grown by 'contactless' PVT using synchrotron white beam topography. Elsevier, 1997.

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Smirnov, Aleksandr. Electromechanics. Fundamentals of theory and computational analysis of electric machines. INFRA-M Academic Publishing LLC., 2024. http://dx.doi.org/10.12737/1211188.

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The basic theoretical principles of electromechanics, the theory of transformers and rotating machines of alternating and direct current, on the basis of which mathematical models and computational algorithms are built, are described. Methods for determining the characteristics and design of contactless electrical machines are presented: asynchronous motors, contactless synchronous (inductor) motors and electromagnetic bearings with calculation examples. Meets the requirements of the federal state educational standards of higher education of the latest generation. It is intended for students, undergraduates, postgraduates and certified specialists whose educational, scientific or professional interests are related to the field of electrical engineering and modern electric drive.

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Book chapters on the topic "Contactless method"

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Choraś, Michał, and Rafał Kozik. "Feature Extraction Method for Contactless Palmprint Biometrics." In Communications in Computer and Information Science. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14831-6_57.

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Braier, Z., P. Šidlof, V. Čejka, and P. Žďárek. "New Method of Contactless Measurement and Analysis of CNC Machine Spindle Lopping." In Advances in Mechanism Design II. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-44087-3_49.

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Le Brun, A., J. L. Lesne, O. Cassier, F. Goncalves, and D. Ferriere. "The Use of a Contactless Ultrasonic Method for Evaluating Grain Size in Steel Sheets." In Nondestructive Characterization of Materials. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-84003-6_40.

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Mohammad Azahari, Afiqah, Arniyati Ahmad, and Syarifah Bahiyah Rahayu. "Contactless Attendance Method with Face Recognition, Body Temperature Measurement and GPS System Using Blockchain Technology." In Advances in Electrical and Electronic Engineering and Computer Science. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6490-5_8.

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Niu, Kai, Fusang Zhang, Xiaolai Fu, and Beihong Jin. "In-Air Handwriting Recognition Using Acoustic Impulse Signals." In Lecture Notes in Computer Science. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09593-1_25.

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AbstractThis paper presents AcousticPAD, a contactless and robust handwriting recognition system that extends the input and interactions beyond the touchscreen using acoustic signals, thus very useful under the impact of the COVID-19 epidemic. To achieve this, we carefully exploit acoustic pulse signals with high accuracy of time of fight (ToF) measurements. Then we employ trilateration localization method to capture the trajectory of handwriting in air. After that, we incorporate a data augmentation module to enhance the handwriting recognition performance. Finally, we customize a back propagation neural network that leverages augmented image dataset to train a model and recognize the acoustic system generated handwriting characters. We implement AcousticPAD prototype using cheap commodity acoustic sensors, and conduct extensive real environment experiments to evaluate its performance. The results validate the robustness of AcousticPAD, and show that it supports 10 digits and 26 English letters recognition at high accuracies.

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Kumar, Ajay. "3D Fingerprint Image Acquisition Methods." In Contactless 3D Fingerprint Identification. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-67681-4_2.

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O’Donoughue, Patrick, Olivier Robin, and Alain Berry. "Inference of Random Excitations from Contactless Vibration Measurements on a Panel or Membrane Using the Virtual Fields Method." In Flinovia—Flow Induced Noise and Vibration Issues and Aspects-II. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76780-2_22.

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Kumar, Ajay. "Other Methods for 3D Fingerprint Matching." In Contactless 3D Fingerprint Identification. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-67681-4_7.

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Sayil, Selahattin. "Conventional Test Methods." In Contactless VLSI Measurement and Testing Techniques. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-69673-7_1.

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Urbanský, Matej, and Robert Grega. "Contactless Measuring Device for Flexible Shaft Coupling Twist Angle." In Current Methods of Construction Design. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-33146-7_23.

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Conference papers on the topic "Contactless method"

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Kuga, Nobuhiro, Ryunosuke Murofushi, and Eiji Hanayama. "Contactless PIM Measurement Method Using Balanced Stripline." In 2024 IEEE Conference on Antenna Measurements and Applications (CAMA). IEEE, 2024. https://doi.org/10.1109/cama62287.2024.10986159.

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Lai, Jianjun, Wang Hao, Cao Feifan, Xiaohao Wang, and Xinghui Li. "Contactless 3D contour reconstruction method based on spectral confocal sensors." In Optical Metrology and Inspection for Industrial Applications XI, edited by Gerd Ehret, Benyong Chen, and Sen Han. SPIE, 2024. http://dx.doi.org/10.1117/12.3036429.

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Kosterev, Anatoliy A. "Exploring Laser-Induced Fluorescence as a Process Analytics Method for Dissolved Oxygen." In Applied Industrial Spectroscopy. Optica Publishing Group, 2024. https://doi.org/10.1364/ais.2024.atu1g.3.

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Laser-induced fluorescence of oxygen in organic solvents is considered for a contactless process analytics method. Neither a photosensitizer nor singlet oxygen traps were added to solvents. Singlet oxygen self-quenching and solvent contamination effects reported.

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Abdelwahab, Ahmed, Henk Van Zeijl, Remco Van Hoorn, Hans Kuipers, and Massimo Mastrangeli. "Pick-and-Release: A Novel Contactless Bonding Method for Die Attachment." In 2025 IEEE 75th Electronic Components and Technology Conference (ECTC). IEEE, 2025. https://doi.org/10.1109/ectc51687.2025.00363.

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Kamiya, Hiroshi, Yamato Ishida, Satoru Honda, Hiroyuki Sato, and Toshiki Kanamoto. "A Contactless LSI Test Method Utilizing Direct Emission From On-Chip Interconnects." In 2024 IEEE 13th Global Conference on Consumer Electronics (GCCE). IEEE, 2024. https://doi.org/10.1109/gcce62371.2024.10760635.

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Zhang, Hongbo, Sean Byler, and WenJing Zhou. "Novel Under-Surface Soil Moisture Measurement with Laser Image Recognition." In CLEO: Applications and Technology. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.ath5a.5.

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A novel contactless under-surface soil moisture measurement method is developed. The laser reflection of the soil is used to measure the soil moisture. The method achieves 99% accuracy of under-surface soil moisture measurement.

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Hoffmann, Karel, and Zbynek Skvor. "Contactless distance measurement method." In 2011 77th ARFTG Microwave Measurement Conference (ARFTG). IEEE, 2011. http://dx.doi.org/10.1109/arftg77.2011.6034559.

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Ondriga, Martin, and Pavol Boek. "Contactless Method of Anthropometric Position Acquisition." In 2012 International Conference on Computer Science and Service System (CSSS). IEEE, 2012. http://dx.doi.org/10.1109/csss.2012.45.

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Yu, L., E. Pun, and E. Meng. "A CONTACTLESS ELECTROCHEMICAL IMPEDANCE MEASUREMENT METHOD." In 2016 Solid-State, Actuators, and Microsystems Workshop. Transducer Research Foundation, 2016. http://dx.doi.org/10.31438/trf.hh2016.35.

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Zolotukhin, Oleh, and Maryna Kudryavtseva. "Authentication Method in Contactless Payment Systems." In 2018 International Scientific-Practical Conference Problems of Infocommunications. Science and Technology (PIC S&T). IEEE, 2018. http://dx.doi.org/10.1109/infocommst.2018.8632065.

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Reports on the topic "Contactless method"

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Tire Experimental Characterization Using Contactless Measurement Methods. SAE International, 2021. http://dx.doi.org/10.4271/2021-01-1114.

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In the frame of automotive Noise Vibration and Harshness (NVH) evaluation, inner cabin noise is among the most important indicators. The main noise contributors can be identified in engine, suspensions, tires, powertrain, brake system, etc. With the advent of E-vehicles and the consequent absence of the Internal Combustion Engine (ICE), tire/road noise has gained more importance, particularly at mid-speed driving and in the spectrum up to 300 Hz. At the state of the art, the identification and characterization of Noise and Vibration sources rely on pointwise sensors (microphones, accelerometers, strain gauges). Optical methods such as Digital Image Correlation (DIC) and Laser Doppler Vibrometer (LDV) have recently received special attention in the NVH field because they can be used to obtain full-field measurements. Moreover, these same techniques could also allow to characterize the tire behavior in operating conditions, which would be practically impossible to derive with standard techniques. In this paper we will demonstrate how non-contact full-field measurement techniques can be used to reliably and robustly characterize the tire behavior up to 300 Hz, focusing on static conditions. Experimental modal analysis will extract the modal characteristic of the tire in both free-free and statically preloaded boundary conditions, using both DIC and LDV. The extracted natural frequencies, damping ratios and full-field mode shapes will be used on one side to improve the accuracy of tire models (either by deriving FRF based models or updating FE ones) but also as a reference for future investigation on the tire behavior characterization in rotating conditions.

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