Simple estimation of equivalent magnetic dipole moment to characterize ELF magnetic fields generated by electric appliances incorporating harmonics

Yamazaki, Kazuhiko; Kawamoto, Tadashi

doi:10.1109/15.925547

Cited by 25 publications

(11 citation statements)

References 10 publications

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“…that generate high-order harmonics. Due to the fast field decay, the interference decreases significantly already one meter away from the source [4]. We also observed experimentally that the generated harmonics are unnoticeable around the carrier frequency of 2.5 kHz, this being one of the reasons why we chose this operating frequency.…”

Section: B 3-d Signal Correlationmentioning

confidence: 77%

Distortion Rejecting Magneto-Inductive Three-Dimensional Localization (MagLoc)

Abrudan

Xiao

Markham

et al. 2015

IEEE J. Select. Areas Commun.

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Localization is a research area that, due to its overarching importance as an enabler for higher level services, has attracted a vast amount of research and commercial interest. For the most part, it can be claimed that GPS provides an unparalleled solution for outdoor tracking and navigation. However, the same cannot yet be said about positioning in GPSdenied or challenged environments, such as indoor environments, where obstructions such as floors and walls heavily attenuate or reflect high frequency radio signals. This has led to a plethora of competing solutions targeted towards a particular application scenario, yielding a fragmented solution landscape. In this paper, we present a fresh approach to 3-D positioning based on the use of very low frequency (kHz) magneto-inductive (MI) fields. The most important property of MI positioning is that obstacles like walls, floors and people that heavily impact the performance of competing approaches are largely "transparent" to the quasi-static magnetic fields. MI has a number of challenges to robust operation that distort positions, including the presence of ferrous materials and sensitivity to user rotation. Through signal processing and sensor fusion across multiple system layers, we show how we can overcome these challenges. We showcase its highly accurate 3-D positioning in a number of environments, with positioning accuracy below 0.8 m even in heavily distorted areas.

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Section: B 3-d Signal Correlationmentioning

confidence: 77%

Distortion Rejecting Magneto-Inductive Three-Dimensional Localization (MagLoc)

Abrudan

Xiao

Markham

et al. 2015

IEEE J. Select. Areas Commun.

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“…A typical example is constituted by heating machines, other examples come from transformers and electrical engines. In these cases worker are often close to the source, where the magnetic field is strongly non-uniform [15], [16].…”

Section: Introductionmentioning

confidence: 98%

Magnetic Field Measurement in Industrial Environment

Bertocco

Greggio

Sieni

et al. 2007

2007 IEEE Instrumentation &Amp; Measurement Technology Conference IMTC 2007

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In this paper issues in the measurement of magnetic field in industrial environment are presented. Finite element simulations of the sensor readings in a non-uniform field are compared with real measurement values. Suggestions in order to improve the measurement accuracy using common three-axial non-centered probes are proposed. Indications about the better probe position with respect the field source are given

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“…Consequently, this paper is focused on a simple characterization technique, aimed at accurately estimating the magnetic dipole moment of a coil. While magnetic dipole measurement is mentioned in the literature, most works do not target accurate characterization of active coils, being mostly focused on approximate characterization of electric appliances [16][17], on characterization of permanent magnets [18], on magnetostatic characterization of space equipment [19], or are strongly focused on modeling [20]. The proposed approach is simple and computationally light, and was validated both by simulations and experimentally, using small coils compatible with short range MPSs.…”

Section: Introductionmentioning

confidence: 99%