scholarly journals APPLICATION OF FREQUENCY PHASE METHOD FOR CONTROL OF OBJECT GEOMETRIC PARAMETERS

2017 ◽  
Vol 2017 (6) ◽  
pp. 88-93 ◽  
Author(s):  
I.O. Bragynets ◽  
◽  
O.G. Kononenko ◽  
Yu.A. Masjurenko ◽  
◽  
...  
Keyword(s):  
Geometric Parameters ◽  
Phase Method ◽  
Frequency Phase

Eddy-current inspection of structural and mechanical characteristics of carbon-reinforced plastics by the nonstationary frequency-phase method

1988 ◽  
Vol 23 (5) ◽  
pp. 637-643
Author(s):  
V. F. Zinchenko ◽  
V. I. Krylovich ◽  
V. I. Alekseenko ◽  
P. N. Logvinovich ◽  
N. M. Evdokimenko ◽  
...  
Keyword(s):  
Eddy Current ◽  
Mechanical Characteristics ◽  
Phase Method ◽  
Reinforced Plastics ◽  
Eddy Current Inspection ◽  
Nonstationary Frequency ◽  
Frequency Phase

scholarly journals Methodology of Measuring Spraying the Droplet Flow of Polymers from Nozzle

Mechanika ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 82-86 ◽  
Author(s):  
Serhiy Leonidovich Horiashchenko
Keyword(s):  
Real Time ◽  
Drop Size ◽  
Nozzle Diameter ◽  
Textile Material ◽  
Phase Method ◽  
Laser Measurement ◽  
Polymer Flow ◽  
Droplet Flow ◽  
Frequency Phase

With a purpose for textile material coating applications, a process of spraying the polymer flow is considered. The equipment for determining the polymer drop size is designed. The formulas for estimating the size of polymer droplets are validated. For controlling and measuring the polymer drop size in real time, the multi-frequency phase method is suggested to be used. Classification is needed to find a category, within which the measurement will be done. Photos of various particles are obtained while experiments of spraying polymers are conducted. The sizes of those particles are determined. It is ascertained with the laser measurement and the corresponding software that when polymer drops get onto a textile material, they cool rapidly. The quality of the material is maintained. For properly spraying the polymer, the pressure of 6 MPa and the nozzle diameter of 2 mm are sufficient. The structure of the textile material along with the coating is maintained best with these parameters.

Measurement of the fluid flow velocity by an acoustic frequency?phase method

1985 ◽  
Vol 49 (2) ◽  
pp. 930-938
Author(s):  
O. G. Martynenko ◽  
V. I. Krylovich ◽  
A. D. Solodukhin ◽  
V. G. Fedorei
Keyword(s):  
Fluid Flow ◽  
Flow Velocity ◽  
Phase Method ◽  
Acoustic Frequency ◽  
Fluid Flow Velocity ◽  
Frequency Phase

Lectin-Induced RBC Agglutination: Chemical vs. Cryofixation

1980 ◽  
Vol 38 ◽  
pp. 664-665
Author(s):  
Dean A. Handley ◽  
Lanping A. Sung ◽  
Shu Chien
Keyword(s):  
Lectin Binding ◽  
Freeze Substitution ◽  
Electrostatic Charge ◽  
Geometric Parameters ◽  
Comparative Approach ◽  
Chemical Fixation ◽  
Cell Surfaces ◽  
Minimal Cell ◽  
Membrane Stiffness ◽  
Cell Contour

RBC agglutination by lectins represents an interactive balance between the attractive (bridging) force due to lectin binding on cell surfaces and disaggregating forces, such as membrane stiffness and electrostatic charge repulsion (1). During agglutination, critical geometric parameters of cell contour and intercellular distance reflect the magnitude of these interactive forces and the size of the bridging macromolecule (2). Valid ultrastructural measurements of these geometric parameters from agglutinated RBC's require preservation with minimal cell distortion. As chemical fixation may adversely influence RBC geometric properties (3), we used chemical fixation and cryofixation (rapid freezing followed by freeze-substitution) as a comparative approach to examine these parameters from RBC agglutinated with Ulex I lectin.

Evaluation of the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings by the multi-frequency radio wave method of a slow surface electromagnetic waves

2020 ◽  
pp. 51-58
Author(s):  
Aleksandr I. Kazmin ◽  
Pavel A. Fedjunin
Keyword(s):  
Radio Wave ◽  
Noise Level ◽  
Electromagnetic Waves ◽  
Dielectric Materials ◽  
Geometric Parameters ◽  
Experimental Investigations ◽  
Wave Method ◽  
Dielectric Coatings ◽  
Surface Electromagnetic Waves ◽  
Multilayer Dielectric

One of the most important diagnostic problems multilayer dielectric materials and coatings is the development of methods for quantitative interpretation of the checkout results their electrophysical and geometric parameters. The results of a study of the potential informativeness of the multi-frequency radio wave method of surface electromagnetic waves during reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings are presented. The simulation model is presented that makes it possible to evaluate of the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings. The model takes into account the values of the electrophysical and geometric parameters of the coating, the noise level in the measurement data and the measurement bandwidth. The results of simulation and experimental investigations of reconstruction of the structure of relative permittivitties and thicknesses of single-layer and double-layer dielectric coatings with different thicknesses, with different values of the standard deviation (RMS) of the noise level in the measured attenuation coefficients of the surface slow electromagnetic wave are presented. Coatings based on the following materials were investigated: polymethyl methacrylate, F-4D PTFE, RO3010. The accuracy of reconstruction of the electrophysical parameters of the layers decreases with an increase in the number of evaluated parameters and an increase in the noise level. The accuracy of the estimates of the electrophysical parameters of the layers also decreases with a decrease in their relative permittivity and thickness. The results of experimental studies confirm the adequacy of the developed simulation model. The presented model allows for a specific measuring complex that implements the multi-frequency radio wave method of surface electromagnetic waves, to quantify the potential possibilities for the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric materials and coatings. Experimental investigations and simulation results of a multilayer dielectric coating demonstrated the theoretical capabilities gained relative error permittivity and thickness of the individual layers with relative error not greater than 10 %, with a measurement bandwidth of 1 GHz and RMS of noise level 0,003–0,004.

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