Приборы и методы измерений: Recent submissions

Now showing items 81-100 of 520

    • Структуроскопия витков пружин после высокотемпературной механической обработки на основе измерения скорости рэлеевских волн 

      Муравьев, В. В.; Гущина, Л. В. (БНТУ, 2022)
      Для изготовления рессорных пружин подвижного состава (вагонов, локомотивов, автомобилей) применяют прутки из пружинных сталей. При высокотемпературной механической обработке при навивке пружин и их закалке возникает различие в скоростях охлаждения внутренней и наружной сторон витков пружины, что приводит к различию в структурном состоянии и сказывается на долговечности пружин. ...
      2022-07-06

    • Probability of Erroneous Data Registration in a Single Photon Erasure-Type Communication Channel with a Receiver Based on a Photon Counter 

      Timofeev, A. M. (БНТУ, 2022)
      When measuring low-power optical signals, it is necessary to ensure the highest reliability of the received data, which is especially important for single-photon communication channels. This determines the expediency of using photon counters as receiving modules for such channels. They are highly sensitive, but are characterized by data recording errors. Therefore, the purpose ...
      2022-07-06

    • Dynamic Features of Spectra of Single and Quasi-Periodic Measuring Signals 

      Suchodolov, U. V.; Isaev, A. V.; Sheinikau, A. A. (БНТУ, 2022)
      Solving the problems of spectral processing of single and quasi-periodic signals in measurement and diagnostic systems is directly related to their isolation against the background of external interference or noise. The purpose of this work was to study single and quasi-periodic signals, i. e. signals limited in time, presented as separate components; development of a mathematical ...
      2022-07-06

    • An Approach to Monitoring of Magnetic Parameters of Cores of a Chain of Spheres. Diagnostics of Different Chain’s Length and Core’s Radius 

      Sandulyak, A. A.; Sandulyak, D. A.; Gorpinenko, Y. O.; Sandulyak, A. V.; Ershova, V. A. (БНТУ, 2022)
      The basic structural elements of the magnetized granular medium (effectively used, in particular, in apparatus of thin magnetic separation) are granule chains (according to channel-by-channel model), in connection with which there is a need to detail the features of their magnetization. The purpose of the work is to develop and implement an approach to measuring magnetic (micro)flows ...
      2022-07-06

    • Influence of Cylindrical Shield Dimensions on Shielding Effectiveness 

      Kanafyev, O. D.; Trukhanov, A. V.; Zubar, T. I.; Grabchikov, S. S.; Panasiuk, M. I.; Kotelnikova, A. N.; Fedkin, V. А.; Fedosyuk, V. M. (БНТУ, 2022)
      Study of dimensional parametersʼ influence on shielding properties of cylindrical shields will allow to optimise the fusion process, as well as to reduce production costs by reducing the material used. The purpose of this work was to compare results of theoretical calculation of shielding effectiveness of an infinite cylindrical shield with the data obtained in real conditions. ...
      2022-07-06

    • System Eliminating Emergency Discharges in Industrial Facilities Waste Waters Using Relative Signal Description 

      Alekseev, V. A.; Yuran, S. I.; Usoltsev, V. P.; Shulmin, D. N. (БНТУ, 2022)
      Peak emergency discharges of harmful substances to the industrial companies waste waters that normally form coagulates over time present a serious environmental problem. These coagulates can enter natural water bodies during the wastewater discharge. Thus, detecting these coagulates in real-time is a relevant problem. To solve this problem, the authors suggest building an automated ...
      2022-07-06

    • Diffuse Reflectance Spectrophotometers Based on C12880MA and C11708MA Mini-Spectrometers Hamamatsu 

      Firago, V. A.; Levkovich, N. V.; Shuliko, K. I. (БНТУ, 2022)
      Diffuse reflection spectroscopy with spatial resolution is a promising direction of non-destructive control of the properties of a number of scattering fine-dispersed materials, including food products. It can find wide practical application only in the presence of compact, easy-to-use and inexpensive spectrophotometric equipment. The aim of the article is to investigate the ...
      2022-07-05

    • Prediction of Dynamic Characteristics of Thermocouples with Thin-Wire Sensing Elements 

      Safina, I. A.; Artemyeva, S. A. (БНТУ, 2022)
      Thermocouples dynamic characteristicsʼ prediction is one of the relevant directions in the field of dynamic measurements of non-stationary temperatures of liquid and gaseous media. Thermocouples dynamic characteristicsʼ prediction makes it possible to provide effective continuous correction in automatic control systems for non-stationary temperatures. The purpose of this paper ...
      2022-07-05

    • Assessing of a Radiation Therapy Sessionʼs Duration at the Stage of Pre-Radiation Preparation 

      Piatkevich, M. N.; Titovich, E. V. (БНТУ, 2022)
      The treatment planning process includes a review of the radiation treatment plan which leads to a decision on the patientʼs treatment technique. The scope of this study was to create a mathematical model for calculating of a radiation therapy session duration during the pre-radiation planning stage. For dosimetric planning of radiation treatment the authors provided a formula and ...
      2022-04-06

    • Analysis of Illumination Generated by LED Matrices Distribution 

      Bogdan, P. S.; Zaytseva, E. G.; Baranov, P. O.; Stepanenko, A. I. (БНТУ, 2022)
      Сreation of indoor lighting systems with the possibility of changing its parameters in space and time is a promising direction within the framework of the intellectual environment system. The aim of this work was to create a methodology for calculating the illumination created by LED matrices which does not require the use of specialized software products and is adapted to the ...
      2022-04-06

    • Method for Increasing of Lens Gluing Technological Process Efficiency and a Reliable Evaluation of Output Controlled Parameters 

      Fiodоrtsev, R. V.; Metelskaya, E. A.; Marchik, V. A.; Kuznetsov, A. V.; Makarevich., A. E. (БНТУ, 2022)
      The use of glued lens components in optical devices improves the image quality of telescopic and photographic lenses or inverting systems by eliminating a number of aberrations, and also reduces light losses in the optical system of the device. The traditional production process of lenses gluing involves the sequential execution of a set of technological operations and takes a ...
      2022-04-06

    • Methods for Accuracy Increasing of Solid Brittle Materials Fracture Toughness Determining 

      Lapitskaya, V. A.; Kuznetsova, T. A.; Chizhik, S. A.; Warcholinski, B. (БНТУ, 2022)
      Method for determining of the fracture toughness of brittle materials by indentation is described. The critical stress intensity factor KIC quantifies the fracture toughness. Methods were developed and applied to improve the accuracy of KIC determination due to atomic force microscopy and nanoindentation. It is necessary to accurately determine parameters and dimensions of the ...
      2022-04-06

    • Determination of 238U Content by Gamma Radiation Emitting from 234mPa Radionuclide 

      Khruschinski, Arkadiy; Kutsen, Semen; Zhukouski, Alex; Sugai, Naoyuki; Sugai, Hiroshi; Mogi, Michinori (БНТУ, 2022)
      Radionuclide 238U is one of the most important radioactive elements that must be controlled in nuclear power engineering, geological exploration, control of radioactive contamination of soils and raw materials used in construction. The most optimal way to control 238U is to use the 234mPa radionuclide, the activity of which, due to its short lifetime (≈ 1.2 min), is unambiguously ...
      2022-04-05

    • Compact Passively Q-Switched Tm:KY(WO4)2 Laser 

      Kisel, V. E. (БНТУ, 2022)
      Diode-pumped thulium lasers emitting in the spectral range near 2 μm are attractive for applications in different areas: surgery, rangefinding, and environmental atmosphere monitoring. In this article the latest results of Tm:KYW laser performance with a polycrystalline Cr:ZnSe as the most available saturable absorber for 2 μm spectral region are presented. A maximum continuous-wave ...
      2022-04-05

    • Кристалл Er3+,Yb3+:YGdSiO5 для лазеров спектрального диапазона 1,5–1,6 мкм 

      Горбаченя, К. Н.; Ясюкевич, А. С.; Кисель, В. Э.; Толстик, Н. А.; Тараченко, А. А.; Гоман, В. И.; Павловский, Л. К.; Орлович, В. А.; Волкова, Е. А.; Япаскурт, В. О.; Кулешов, Н. В. (БНТУ, 2022)
      Твердотельные эрбиевые лазеры, излучающие в спектральной области 1,5–1,6 мкм, представляют большой интерес для различных практических применений. Из доступных на сегодня лазерных материалов для получения стимулированного излучения в области 1,5 мкм наибольшее распространение получили фосфатные стёкла, легированные ионами Er3+. Однако максимальные выходные мощности таких лазеров ...
      2022-04-04

    • Devices and Methods for Measuring of the Ambient Air Dust. Short Review 

      Mukhurov, N. I.; Khodin, A. A.; Kim, Y.-J. (БНТУ, 2022)
      The main characteristics of airborne micro/nanoparticles, their impact on human health and air quality standards are presented. International standards classify microparticles by size (PM10, PM2.5, PM1, UFP), establish maximum allowable concentrations and control methods. Particular attention is paid to carbonand virus-containing microparticles control. To monitor the air environment ...
      2022-04-01

    • Increasing of the Accuracy of Signalsʼ Time Parameters Measuring Using Double Pulse Trains 

      Isaev, A. V.; Suchodolov, U. V.; Sushko, A. S.; Sheinikau, A. A. (БНТУ, 2021)
      In modern diagnostics, much attention is paid to measuring of time parameters, as well as their change over time. The purpose of this work is to develop a method for measuring of time intervals which made it possible to increase the measurement accuracy by reducing errors associated with the instability of main parameters of the pulse signal. In the most of approaches used, the ...
      2021-12-22

    • Application of Solutions of Uncorrected Tasksʼ Theory for Managing of Production Processesʼ Robustness 

      Serenkov, P. S.; Romanchak, V. M.; Pesliak, I. E. (БНТУ, 2021)
      The industrial revolution of “Industry 4.0” is currently underway at an active pace. Individualization of provided products and services, transition to single production, the issues of acceptability of production processes at the stage of development and design have became urgent. The aim of this work was to develop a strategy for a fundamental solution to the task of guaranteed ...
      2021-12-22

    • Influence of Geometry and Boundary Conditions in Area of the Cohesion between Materials on the Reflection of an Ultrasonic Beam. Part 2. Features of Experimental Simulation 

      Baev, A. R.; Levkovitch, N. V.; Asadchaya, M. V.; Mayorov, A. L.; Razmyslovich, G. I.; Burnos, A. Y. (БНТУ, 2021)
      Improving the efficiency of diagnostics of objects with layered structure as applied to detection of poorly detectable material bonding defects is an important production task. The aim of the work was to experimentally simulate ultrasonic scattering by samples of proposed defect simulator designs with discretely and smoothly varying boundary conditions correlating with the phase ...
      2021-12-22

    • Application of the Correlation Measurement Method for Reconstructing of the Velocity Profile with Spatial and Temporal Discretization in Studies of the Hydrodynamics of Turbulent Flows Based on the Matrix Conductometry Method 

      Dmitriev, S. M.; Khrobostov, A. E.; Solncev, D. N.; Barinov, A. A.; Chesnokov, A. A.; Konovalov, I. A.; Makarov, M. A.; Zyryanova, T. K. (БНТУ, 2021)
      The correlation method for measuring of the coolant flow rate is used in the operation of nuclear power plants and is widespread in research practice including study of turbulent flows hydrodynamics. However the question of its applicability and possibilities in studies using the matrix conductometry method remains open. Earlier the algorithm for determining of the correlation ...
      2021-12-22