Magnetic sensors assessment in velocity induced eddy current testing

Rocha, Tiago; Ramos, Helena G.; Ribeiro, A. Lopes; Pasadas, Dário J.

doi:10.1016/j.sna.2015.02.004

Cited by 49 publications

(18 citation statements)

References 8 publications

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“…Typical applications are, for example, speed sensors in electrical motors, ampermeter clamps and various Hall effect sensors [18]. They are widely adopted also in the automotive industry where the operating ambient is dirty or hot, or in presence of vibrations requiring a detection without contact.…”

Section: B About Sensor Applicationsmentioning

confidence: 99%

Hybrid magnetic composite (HMC) materials for sensor applications

Ferraris

Franchini

Pošković

2016

2016 IEEE Sensors Applications Symposium (SAS)

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Several applications adopt electromagnetic sensors, that base their principle on the presence of magnets realized with specific magnetic materials that show a rather high remanence, but low coercivity. This work concerns the production, analysis and characterization of hybrid composite materials, with the use of metal powders, which aim to reach those specific properties. In order to obtain the best coercivity and remanence characteristics various "recipes" have been used with different percentages of soft and hard magnetic materials, bonded together by a plastic binder. The goal was to find out the interdependence between the magnetic powder composition and the characteristics of the final material. Soft magnetic material (special Fe powder) has been used to obtain a low coercivity value, while hard materials were primarily used for maintaining a good induction remanence; by increasing the soft proportion a higher magnetic permeability has been also obtained. All the selected materials have been characterized and then tested; in order to verify the validity of the proposed materials two practical tests have been performed. Special magnets have been realized for a comparison with original ones (AlNiCo and ferrite) for two experimental cases: the first is consisting in an encoder realized through a toothed wheel, the second regards the special system used for the electric guitars.

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Section: B About Sensor Applicationsmentioning

confidence: 99%

Hybrid magnetic composite (HMC) materials for sensor applications

Ferraris

Franchini

Pošković

2016

2016 IEEE Sensors Applications Symposium (SAS)

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“…Eddy current testing using electromagnetic phenomena is a very useful method for detecting flaws such as cracks on the surface of a test piece, and is widely used in the industry [1][2][3][4][5]. Eddy current probes have been used to enhance the signal/noise (S/N) ratio [6].…”

Section: Introductionmentioning

confidence: 99%

Flaw Detection in Aluminum Plates Using a Rotating Uniform Eddy Current Probe with Two Pairs of Excitation Coils

Repelianto

Kasai

Sekino³

et al. 2019

Metals

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The use of eddy currents for detecting flaws in specimens is of considerable significance in the industrial sector. In this study, a new design of a rotating uniform eddy current (UEC) probe, termed the rotating butterfly probe, is presented. The probe consists of two pairs of excitation coils arranged perpendicular to each other, positioned in two layers, and in a detection coil. The excitation and detection coils were installed the pancake orientation, which provides larger induction and enhances the sensitivity of flaws detection. In addition, to generate a rotating UEC distribution with same amplitude in all directions, the number of turns between first and second layers of the excitation coils and the amplitude of excitation current were arranged. Finite element simulations were conducted to confirm that rotating UEC distribution has the same amplitude in all directions. The experiment with the rotating butterfly probe was then conducted. In the experiment, the measured results with the probe was indicated the self-differential and self-nulling properties. Moreover, the probe was successful in detecting flaws in all directions on an aluminum plate. This attribute can be used for the effective inspection of test pieces.

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“…Use of these alloys in such spheres as aircraft construction, automobile construction, space engineering, imposes high requirements on the structure and mechanical properties. This task is the subject of a number of papers [2][3][4][5][6]. Flaw detection in cracks between two aluminum plates with a model defect in the center is discussed in [2].…”

Section: Introductionmentioning

confidence: 99%

“…This problem is solved using magnetic field concentrators made of ferrite with a high magnetic permeability. Ferrite concentrators significantly reduce the dispersion of the eddy currents [5,6].…”

Section: Introductionmentioning

confidence: 99%

Research of aluminum alloys with using eddy-current transducers on the basis of cores of various form

Дмитриев¹,

Ишков²,

Катасонов³

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Research of Steel to Dielectric TransitionAbstract. The research aims to develop a microminiature eddy current transducer for aluminum alloys. The research topic is considered relevant due to the need for evaluation and forecasting of safe operating life of aluminum. A microminiature transformer-type transducer was designed, which enables to perform local investigations of unferromagnetic materials using eddy-current method based on local studies conductivity. Having the designed transducer as a basis, a hardware-software complex was built to perform experimental studies of aluminium. Cores with different shapes were used in this work. Test results are reported for a flaws in the form of hidden slits and apertures inside the slabs is derived for excitation coil frequencies of 300-700 Hz.

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Magnetic sensors assessment in velocity induced eddy current testing

Cited by 49 publications

References 8 publications

Hybrid magnetic composite (HMC) materials for sensor applications

Hybrid magnetic composite (HMC) materials for sensor applications

Flaw Detection in Aluminum Plates Using a Rotating Uniform Eddy Current Probe with Two Pairs of Excitation Coils

Research of aluminum alloys with using eddy-current transducers on the basis of cores of various form

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