Analysis of a ferrofluid core differential transformer tilt measurement sensor

Medvegy, Tibor; Molnár, Ágnes; Molnár, Gergely; Gugolya, Zoltán

doi:10.1016/j.jmmm.2016.12.026

Cited by 12 publications

(5 citation statements)

References 12 publications

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“…Consequently, the arithmetic mean of the magnetic diameter at 293 K can be estimated by considering the arithmetic means of the magnetic diameter at the remaining temperatures. The computation of the arithmetic mean dv of the magnetic diameter is expressed in equation (13). By comparing the two functions presented in equation ( 15), the following relationship can be deduced:…”

Section: Magnetic Diameters Under High and Low Temperaturesmentioning

confidence: 99%

“…Chen believed that MNPs size affects the performance of seal and damper [11]. Additionally, Medvegy proves that MNPs size diameter is one of the most important factors affecting the precision of magnetic fluids sensors [13]. In recent years, magnetic fluids have garnered attention as the heat transfer fluid owing to its exceptional thermal conductivity and heat transfer properties.…”

Section: Introductionmentioning

confidence: 99%

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Inversion of magnetic diameter distribution of magnetic fluids under high and low temperatures

Xue,

Yang,

Zhang

et al. 2024

Nanotechnology

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The magnetic diameter is a crucial factor affecting the magnetic properties of magnetic fluid. The magnetic diameter distribution can be estimated based on the magnetic properties. However, the magnetic dipole interaction of magnetic nanoparticles (MNPs) and the variation of the magnetic diameter with temperature have received relatively little attention in previous research. Hence, this research proposes the AP-MMF1-L method to inverse the magnetic diameter which considers the magnetic dipole interaction and derives the magnetic diameter at different temperatures. Firstly the AP-MMF1-L uses the least square method between the first-order modified mean-field Langevin function (MMF1-L) and the measured magnetization curve as the objective function. Meanwhile, the hybrid Artificial bee colony-Particle swarm (AP) optimization algorithm is introduced to inverse the optimal magnetic diameter distribution. Secondly, the hydrodynamic diameter distribution experimental values are compared with the theoretical values, demonstrating the AP-MMF1-L method obtains accurate inversion results of the magnetic diameter distribution when compared to other models. Finally, the arithmetic mean of the magnetic diameter at different temperatures is investigated, revealing a decreasing trend as the temperature rises, approximately following a linear distribution. The AP-MMF1-L provides a novel and effective tool for accurately determining the magnetic diameter of the MNPs across various temperatures.

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Section: Magnetic Diameters Under High and Low Temperaturesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inversion of magnetic diameter distribution of magnetic fluids under high and low temperatures

Xue,

Yang,

Zhang

et al. 2024

Nanotechnology

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“…The disadvantage is that it will affect the measurement results when it is affected by vibration, and the angle measurement range is small; the magnetic fluid inclination sensor proposed by T.Medvegy [7] et al is shown in Fig. 4.…”

Section: Types Of Magnetic Fluid Inclination Sensormentioning

confidence: 99%

Summary of Research on Magnetic Fluid and Its Inclination Sensor

Kong

Shaojie

Xueyu

2021

JERR

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Magnetic fluid is a multifunctional new fluid material. Because of its combination of magnetism and fluidity, it has an irreplaceable role in many occasions.The application of magnetic fluid in the sensor field is not yet mature, but with the continuous attempts of researchers, the huge potential of magnetic fluid in this field has been explored.This paper mainly introduces the application of magnetic fluid in the field of sensor, and briefly introduces the characteristics and manufacturing method of magnetic fluid.The principle of the magnetic fluid inclination sensor is introduced emphatically, and the magnetic fluid inclination sensor is classified according to the different restriction methods of the magnetic fluid.Pointed out the gap between the research directions of magnetic fluid inclination sensors at home and abroad, as well as the problems existing in research and development, and prospects for future innovation in this field.

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“…As a new type of functional material, magnetic nanofluid has unique properties of both magnetism and fluidity. , Therefore, it has been widely used in various fields like rotary sealing, lubrication, biomedicine, dampening, tilt measurement sensors, and so on. In order to study the effect of viscosity of magnetic nanofluids on the sealing capability, we need to prepare serial magnetic nanofluids with similar properties but different viscosities.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study on the Preparation of High-Viscosity Magnetic Nanofluid by Combined Surfactants

Chen,

Li,

Nie

2024

ACS Omega

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In this study, the mechanism by which combined surfactants affect the dispersion stability of magnetic nanofluids (MNFs) was improved. Two stable lubricating oil-based magnetic nanofluids with high viscosity and one with low viscosity were prepared by chemical coprecipitation. Erucic acid and octanoic acid were used as the combined surfactants to modify the Fe 3 O 4 nanoparticles (MNPs). The size and morphology of the particles were observed using TEM. The rheological properties were tested with a rotational rheometer. The magnetization of the lubricating oil-based magnetic nanofluids was characterized by VSM. The results indicated that the prepared magnetic nanofluids had high viscosity, high magnetism, and good stability. This study provided ideas for the preparation of a high-viscosity magnetic nanofluid. By using combined surfactants, sufficient steric repulsion energy can be provided to counteract the attraction energy of sterically protected nanoparticles, thus achieving a balance of the dispersion stability of MNF.

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Analysis of a ferrofluid core differential transformer tilt measurement sensor

Cited by 12 publications

References 12 publications

Inversion of magnetic diameter distribution of magnetic fluids under high and low temperatures

Inversion of magnetic diameter distribution of magnetic fluids under high and low temperatures

Summary of Research on Magnetic Fluid and Its Inclination Sensor

Theoretical and Experimental Study on the Preparation of High-Viscosity Magnetic Nanofluid by Combined Surfactants

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