Subminiature Eddy-Current Transducers for Conductive Materials and Layered Composites Research

Дмитриев, С. Ф.; Ишков, А. В.; Катасонов, А. О.; Malikov, V. N.; Sagalakov, A. M.

doi:10.1007/978-3-319-70987-1_70

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…As it is shown in [20], it enters the nonhomogeneous Helmholtz equation for the vector potential of the eddy-current field of a multilayer medium along with the magnetic permeability of the material and approaches the value of the electrical conductivity of a solid bulk material as the number of layers in the MPLC increases and the thickness of the dielectric layers decreases. At the same time, the contribution to the value of the voltage introduced into the measuring winding of the SMECT with high locality and the ratio of the radii of the measuring and transmitting coils is not less than 0.2-0.4 from each new layer will be from 10 to 25% which is enough to record it by any measuring instrument with an absolute permissible error not exceeding 3.5%.…”

Section: Resultsmentioning

confidence: 97%

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Control Quality of Composite Materials by Using Subminiature Eddy Current Transducers

Дмитриев

Ишков

Malikov

et al. 2019

MSF

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Based eddy current transducer (ECT), a probe has been designed to research composite materials. Defects inspection of composite materials is performed to determine the following standard defects: defect of the metallic and (or) polymer layer uniformity. The subminiature ECT of the original design is used as a sensor in this device, it is made according to a differential scheme of switching on of the coils of a transformer ECT and allowing to localize the control area up to 0.1-0.5 mm. The measurement procedure allowing one to detect defects in composite materials with a high accuracy is described. The sensor was tested on the composite material consisting of paper or low-density polyethylene and aluminum layers in which the model defect was placed. The dependences of the ECT signal on the defect in this structure are given. The determined dependence of electrical conductivity of composite materials on model defects make it possible to carry out defects inspection of composite materials.

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Section: Resultsmentioning

confidence: 97%

“…Earlier, we reported on the successful development and testing of a virtualized measuring instrument -a conductivity meter for non-ferromagnetic materials -CMNFM-5FA [19,20].…”

Section: Introductionmentioning

confidence: 99%

Control Quality of Composite Materials by Using Subminiature Eddy Current Transducers

Дмитриев

Ишков

Malikov

et al. 2019

MSF

Self Cite

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“…Based on the conclusions drawn from the analysis of the first chapter and previous studies [28][29][30][31], a subminiature eddy current transducer was developed, designed to study the electrical conductivity, thickness and degree of damage of thin metal films, and a hardware and software complex was designed to allow control of the developed transducer. The eddy current transducer is the main element of the developed measuring system and is part of the hardware and software complex that controls the operation of the entire system.…”

Section: Materials and Methods Of Researchmentioning

confidence: 99%

Eddy Current Method for Studying Inhomogeneities and Defects in Thin Metal Films

Malikov

2023

Eurasian phys. tech. j.

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The variety of structure and specific properties associated with the small thickness of thin metal films lead to the fact that their physical characteristics differ significantly from the characteristics of the same materials in the bulk state. To determine the characteristics of thin metal films, the development of new non-destructive research methods is relevant. The article substantiates the advantages of the eddy current testing method for studying the surface of thin metal films of various metals. The design of a subminiature eddy current transducer designed to study the electrical conductivity, thickness and degree of damage of thin metal films is presented, and a hardware and software complex is designed that allows the control of the developed transducer. The study of metal films made it possible to show the inhomogeneity of the distribution of the substance over the surface of the substrate. The dependence of the signal amplitude of the developed transducer on the film thicknesswas also determined. To verify the results obtained, studies of the light transmittance of the films were carried out using the photometric method. Comparison of the measurement results obtained by the two methods showed a high degree of agreement betweenthe two developed methods for studying films.

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“…For the purpose to measure the voltage of ECT at the dielectric-steel interface, a measuring system based on ECT [13,14] and a digital displacement transducer (DDT) were used. The ECT (Fig.…”

Section: Materials Choices and Designmentioning

confidence: 99%

Superminiature Eddy-Current Transducers for Studying Steel to Dielectric Junctions

Дмитриев

Ишков

Malikov

et al. 2018

MSF

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We applied eddy current transducer (ECT) to examine the electric steel parameters. The research topic is considered relevant due to the need for evaluation and forecasting of safe operating life of electric steel products. A scheme that uses a computer as a generator and receiver of signals from windings is proposed. Having the designed transducer as a basis, a hardware-software complex was built to perform experimental studies of steel at the interface boundary. The article provides the key technical information about the eddy current transformer used and describes the methodology of measurements that makes it possible to control steel to dielectric transition. Test results are reported for a specimen with continuous and discrete measurements taken at different frequencies. The curve of introduced voltage amplitude as a function of sensor location was constructed to study in details the introduced voltage drop at the ferromagnetic-dielectric interface. Presentation of induced voltage changes in the form of mathematical dependences enables to elicit the ways of interaction between electromagnetic field of eddy-current converter and residual magnetic field of steel.

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Subminiature Eddy-Current Transducers for Conductive Materials and Layered Composites Research

Cited by 6 publications

References 8 publications

Control Quality of Composite Materials by Using Subminiature Eddy Current Transducers

Control Quality of Composite Materials by Using Subminiature Eddy Current Transducers

Eddy Current Method for Studying Inhomogeneities and Defects in Thin Metal Films

Superminiature Eddy-Current Transducers for Studying Steel to Dielectric Junctions

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