Browsing Приборы и методы измерений by Title
Now showing items 60-79 of 483
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Gamma-spectrometer for water areas and bottom sediments radiation monitoring
(БНТУ, 2016)In order to solve the problem of continuous or periodic monitoring of water areas affected by radioactive contamination in the result of scheduled emissions in nuclear power plants or in the result of emergency situations in nuclear fuel cycle plants we need to develop measurement instruments with advanced mathematics and program support to assess the level of radioactive ...2016-12-12 -
High Power Diode-Pumped Erbium Laser Emitting at Near 1.5 μm
(БНТУ, 2021)Solid-state lasers emitting in the 1.5–1.6 μm spectral range are very promising for eye-safe laser range finding, ophthalmology, fiber-optic communication systems, and optical location. The aim of this work is the investigation of spectrosposcopic and laser properties of gain medium based on borate crystal for abovementioned lasers. Spectroscopic and laser properties of ...2021-07-06 -
High Power SESAM Mode-Locked Laser Based on Yb3+:YAlO3 Bulk Crystal
(БНТУ, 2020)Yttrium aluminium perovskite YAlO3 (YAP) crystal, doped with rare-earth ions, has been extensively studied as a diode-pumped laser host material. The wide interest to rare-earth ions doped YAP crystals is explained by its good thermal and mechanical properties, high natural birefringence, widely used Czochralski growth method. The aim of this work was to study the Yb3+:YAlO3 ...2020-09-18 -
High-efficiency infrared receiver
(БНТУ, 2016)Исследования и разработки последних лет показывают перспективность использования высокоэффективных твердотельных приемников электромагнитного излучения на основе низкобарьерных диодов Шоттки. Особенно активно развивается подход к конструированию приемников на основе δ-легированных низкобарьерных диодов Шоттки с балочными выводами без смещения, так как для неохлаждаемых приемников ...2016-09-11 -
High-Frequency Capacitor with Working Substance "Insulator–Undoped Silicon–Insulator"
(БНТУ, 2022)The study of the parameters of capacitors with various working substances is of interest for the design and creation of electronic elements, in particular for the development of high-frequency phase-shifting circuits. The purpose of the work is to calculate the high-frequency capacitance of a capacitor with the working substance insulator undoped silicon insulator at different ...2022-12-29 -
Holographic visualization of cylindrical piezoceramic transducers vibrations
(БНТУ, 2013)The piezomaterial used in cylindrical piezoceramic transducers vibrations requiring high precision displacements indicates that accuracy depends on design and technological factors. The analyzed criteria have made possible to choose the piezomaterial for optimal mechatronic system having a maximal displacement. The experimental investigation of precision vibrosystems by means of ...2014-06-02 -
Improving of Surface Quality of Metal Reflector Mirrors Machined by Single Point Diamond Turning
(БНТУ, 2021)Improving the technology of diamond turning of aluminum alloys is of great importance for expanding the application areas of metal-optical products based on aluminum in aerospace technology. The aim of this work was to study the effect of surface inhomogeneities of the initial aluminum alloy substrates on their optical and mechanical characteristics and to determine ways of ...2021-07-08 -
Impulsively-Laser Excitation and Propagation of Ultrasonic Waves through Nanomagnetic Fluid
(БНТУ, 2021)Magnetic fluids belong to the class of nanomaterials with a high gain of light absorption, aggregative and sedimentation stability as well as controllability by external fields, which is of interest to use in the field of optoacoustics. The purpose of the work was to experimentally study the effect of the optoacoustic transformation in a magnetic fluid, depending on the concentration ...2021-10-18 -
Impulsively-Laser Excitation and Propagation of Ultrasonic Waves through Nanomagnetic Fluid
(БНТУ, 2021)Magnetic fluids belong to the class of nanomaterials with a high gain of light absorption, aggregative and sedimentation stability as well as controllability by external fields, which is of interest to use in the field of optoacoustics. The purpose of the work was to experimentally study the effect of the optoacoustic transformation in a magnetic fluid, depending on the concentration ...2021-10-15 -
In-Band Pumped Continuous-Wave Lasers Based on Ho:KY(WO4)2 Crystal and Ho:KGdYbY(WO4)2 Epitaxial Layer
(БНТУ, 2020)2 μm lasers are in demand for a number of practical applications, such as environmental monitoring, remote sensing, medicine, material processing, and are also used as a pump sources for optical parametric generators. Crystals of double potassium tungstates doped with ions of rare-earth elements were shown to be promising materials both for the creation of classical solid-state ...2020-12-18 -
Increasing of the Accuracy of Signalsʼ Time Parameters Measuring Using Double Pulse Trains
(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 -
Inductive Type Impedance of Mo/n-Si Barrier Structures Irradiated with Alpha Particles
(БНТУ, 2023)In silicon microelectronics, flat metal spirals are formed to create an integrated inductance. However, the maximum specific inductance of such spirals at low frequencies is limited to a value of the order of tens of microhenries per square centimeter. Gyrators, devices based on operational amplifiers with approximately the same specific inductance as spirals, are also used. ...2023-04-13 -
Influence of additional vibration impact on the effectiveness of electrical stimulation procedure
(БНТУ, 2017)An experimental instrument complex which includes hardware for performing complex procedures using electrical shock massager frictional action was performed. The aim of the study was to influence the additional vibration effect on the efficiency of the procedure of electrostimulation. In order to increase the efficiency of the procedure electrostimulation authors proposed to carry ...2017-06-09 -
Influence of Cylindrical Shield Dimensions on Shielding Effectiveness
(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 -
Influence of Geometry and Boundary Conditions in Area of Cohesion between Materials on the Reflection of an Ultrasonic Beam. Part 1. Theoretical Research
(БНТУ, 2021)The improvement of efficiency, reliability and productivity of ultrasonic testing of objects with cohesion between materials connected by welding, soldering, gluing, etc. is 'an important problem of the modern production technologies. The purpose of the paper is to determine in 3D space the conditions for increasing the sensitivity and reliability of the flaw detection in the ...2021-07-07 -
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
(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 -
Influence of laser beam profile on light scattering by human skin during photometry by ellipsoidal reflectors
(БНТУ, 2018)The correct accounting of laser emitter parameters for improvement of diagnostic authenticity of methods of optical biomedical diagnostic is important problem for applied biophotonic tasks. The purpose of the current research is estimation of influence of energy distribution profile in transversal section of laser beam on light scattering by human skin layers at photometry by ...2018-03-17 -
The influence of soil density and the character of radioactive ¹³⁴Cs and ¹³⁷Cs pollution’s distribution on in situ measurements
(БНТУ, 2018)Periodic radiation monitoring of soils today is a priority task not only for Belarus, but also for Japan, suffered by Fukushima nuclear power plant accident. Use of portable and light spectrometers with ability to perform in situ measurements makes it possible to quickly estimate specific activity of measured radionuclides with required accuracy in particular soil site. Basic ...2018-03-17 -
Influence of Temperature from 20 to 100 °C on Specific Surface Energy and Fracture Toughness of Silicon Wafers
(БНТУ, 2023)The influence of temperature in the range from 20 to 100 °C on the specific surface energy and fracture toughness of standard silicon wafers of three orientations (100), (110) and (111) was studied. Silicon wafers were heated on a special thermal platform with an autonomous heating controller, which was installed under the samples. At each temperature, the samples were kept for ...2023-12-12 -
Inspection robots with piezo actuators: modeling, simulation and prototypes
(БНТУ, 2011)Models, simulations and experimental setups of resonant inspection robots are presented. The goal is to show ways to cope with the new requirements and to use the given chances to create novel mobile robots. For the creation of a directed motion the vibration behavior of simple beams and plates is used. It is possible to design robots for 2-dimesnional locomotion which are ...2012-03-27
