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Determine complex conductivity of the microwave discharge plasma in resonator of the ion source. Using CST Microwave Studio allowed us to calculate dimensions of the resonance microwave window providing necessary reflection coefficient and to find effective amount of microwave discharge plasma from condition of resonance preservation. This makes it possible to determine value of electromagnetic filed...
One of the areas is a 3D printing frequency (RF) dielectric heating is used to intensify heat treatment of various dielectric materials used for constructing 3D models. Electrotechnological microwave system with 3D printer allows you to accelerate the process of prototyping, and eliminate disadvantages such as deformation of the object and resize when sintering at use as a material of clays and other...
Research and development of microwave installation for high-intensity thermal treatment of the mineral raw materials on 50 kW at 915 MHz have been done. The possibility of using the working chamber of the waveguide-transmission type for the creation of efficient microwave installations, high power was shown. Device for sacrifices and movement of minerals in microwave working chamber was developed...
In this paper we propose a method and instrumentation for the study of the processes of quenching of the triplet states of luminescent probes and for determination of heavy metals in the human serum albumin and bovine serum albumin. The method is based on the quenching by heavy metal ions of phosphorescence of the probes, non-covalently bound to the protein globules. As quenchers we used heavy metal...
Accuracy analysis of the basic geometrical parameters of multilayer printed wiring boards (ML-PWB) is considered. It is emphasized that ML-PWB, in contrast to many types of instrument making products may contain thousands of holes, and surrounding the contact pads on the accuracy of manufacturing which are increased requirements. The theoretical distribution laws (Gauss, Pearson, etc.) are considered...
In this paper, we propose to change the structure of the magnetization inductor for magnets magnetized in the axial direction. This construction is characterized by the increasing from the center to the periphery (in axial direction) sections diameter. This approach has several advantages over conventionally used cylindrical inductor. In addition, we calculating the topology of magnetic field inducers,...
It is suggested the concept of a switching function used for the linearization of the static converter circuit in the analysis of steady-state and transient, defuse to the formal decision of problems of synthesis. The article shows the possibility of presenting switching functions in the basis of binary operations of choice of implicative algebra for the identification of individual variables with...
The article deals with the possibility of using microwave energy to heat concrete before pouring into molds. The experimental researches of increase of heavy concrete strength at microwave heating are made. The perspectives of the rapid microwave concrete hardening at 40–60 °C are shown. The possibilities of creating of high-power microwave installations for preheating of concrete mixtures using waveguide...
As a method of formation of hierarchical structure of fillers of the waveguide paths of microwave devices it is offered to use additive technologies. Researches of influence of the microwave oven of an electromagnetic field of various specific power on strength characteristics of objects are made of the powder materials created by 3D press. It is established that the microwave oven an electromagnetic...
Many devices need DC source with low ripple for normal operation. Three-phase bridge rectifiers are most commonly used as the base unit in the source. A simulation model built in MATLAB/SIMULINK is used to analyze the operating of DC source under unbalance mains. The simulation results characterize quality of output voltage versus unbalance of phase voltage.
Induction heating is one of the promising methods of thermal treatment of metals. Thyristor frequency converters that are complex and expensive electrical products are used as power sources of induction heaters. Information about the currents and voltages of the circuit elements is extremely important during the planning stage of frequency converter. Developed a simulation model of thyristor frequency...
The problem of providing improved noise stability of monitoring and diagnostic systems of digital devices of distributed information-control and information-measuring systems with communication channels, working in conditions of action of pulsed random high intensity noise discusses in this article. options for building of monitoring and diagnostic systems based on the model of K-ary information models...
Relevance of research is caused by need of an assessment of the extreme magnetic energy reserved in working gaps of the electromechanical converter of electromagnetic type at saturated magnetic system at a stage of start-off of an anchor. As the electromechanical converter the pulse linear electromagnetic engine can be used. Such assessment will allow to reveal ways of increase of specific power indicators...
Complex investigations of the chemical composition of the surface layer of the cathode foil with a black sequential application of layers of titanium and titanium nitride as a function of the process fluid in the working chamber of the vacuum plant. The operation of the equipment, a method of manufacturing the cathode foil by applying a porous coating in which the material occurs in a vacuum evaporation...
The development of measuring converters with a direct voltage-to-frequency conversion represents significant interest. This paper describes the possibility of using acoustoelectric effect for the development voltage-to-frequency converters. The first part of this paper deals with the theory of the acoustoelectric effect. In the second part the design and the realization of the voltage-to-frequency...
Application of new statistical methods for triangular sensor signal analysis is considered. The critical parameter here is the center of the laser beam. It is shown that the proposed method allows increasing accuracy of the sensors. Experimental verification has shown that the use of center of mass technique decreases root-mean-square error in 50%. While the proposed centralized integral steps method...
Technologies of vacuum electron devices and their prospects of development based on nanotechnological approaches are considered. It is shown that the vacuum electron devices operation inevitably leads to a change in original characteristics of device elements in nanoregions due to intensive mutual influence of its parts with different properties and functions in consequence of the combination of these...
Multi-antenna GNSS are widely used in various industries, it consists of three or more L1 GPS receivers. This system provides the high accuracy of relative coordinates determination (centimeter accuracy). The main drawback of this system is a long start period because of the need of resolving phase ambiguities. Analysis of the resolving was held and the method of reducing start time was proposed....
The article proposes an approach to calculating the aliasing error when sampling signals from smart sensors. Antialiasing filter placed before the time discretization of an analog sensor signal (the developers are trying to receive a finite signal spectrum of the sensor). But errors of modern sensors sometimes reach 10−12…10−24 that makes the filter settings burdensome requirements on error of the...
The paper represents a new concept of thermal infrared sensor array based on the micro(nano)-electromechanical system (MNEMS) with non-stationary Seebeck effect. The application of Seebeck effect readout method in the sensing element using the “switchable” thermocouple is analyzed. The main characteristics of such a sensitive element for an IR imager array and their interrelation are discussed, i...
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