Accurately Locating a Vertical Magnetic Dipole Buried in a Conducting Earth

Ayuso, Natalia; Cuchí, José Antonio; Lera, F.; Villarroel, José Luis

doi:10.1109/tgrs.2010.2048918

Cited by 28 publications

(14 citation statements)

References 15 publications

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“…Since the middle of the last century a buried vertical oscillating magnetic dipole has been used to establish the surface point in its axis (radiolocation). Proposed methods have reported an accuracy of 3% of the burial depth (see Ayuso et al, 2010). Thus, the wellknown geometry of the magnetic field for the vertical transmitter could be used to define a specific coarse search method to be used in the forced vertical emission case.…”

Section: Vertical Transmissionmentioning

confidence: 99%

A deep insight into avalanche transceivers for optimizing rescue

Ayuso

Cuchí

Lera

et al. 2015

Cold Regions Science and Technology

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Section: Vertical Transmissionmentioning

confidence: 99%

A deep insight into avalanche transceivers for optimizing rescue

Ayuso

Cuchí

Lera

et al. 2015

Cold Regions Science and Technology

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“…Nowadays, there is a growing interest in using magnetic induction systems for geophysics (see Abdu et al, 2007;Becker et al, 1992;Corwin & Lesch, 2003;Durkin, 1991;Heil & Schmidhalter, 2017), location (see eg. Ayuso et al, 2010;Davis et al, 2008;Markham et al, 2012;Sogade et al, 2004), emergency communications in confined environments such as mines or caves (see Bandyiopadhyay et al, 2010;Yan et al, 2013a), and wireless underground and undersea communication networks (see, e.g., Akyildiz et al, 2015;Akyildiz & Stuntebeck, 2006a;Domingo, 2014;Sun & Akyildiz, 2010;Tan et al, 2015;Wang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

A Computational Channel Model for Magnetic Induction‐Based Subsurface Applications

et al. 2019

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There are many underground applications based on magnetic fields generated by an oscillating magnetic source. For them, a magnetic dipole in a three‐layered region with upper semi‐infinite air layer can be a convenient idealization used for their planning, development, and operation. Solutions are in the form of the well‐known Sommerfeld integral expressions that can be evaluated by numerical methods. A set of field expressions to be numerically evaluated by an efficient algorithm are not collected comprehensively yet, or at least in a directly usable form. In this paper, the explicit magnetic field solutions for the vertical magnetic dipole and the horizontal magnetic dipole for a general source‐observer location are derived from the Hertz vector. They can be properly combined to model the problem of a tilted magnetic dipole source for horizontally or inclined stratified media. As a result, a complete set of integral equations of the Sommerfeld type valid from the near zone to the far zone are formulated. A method for numerical evaluation of the field expressions for high accurate computations is described. The numerical results are validated using the finite element method for all the possible source‐receiver configurations and three well‐spanned frequencies of typical subsurface applications. Both numerical solutions agree according to the normalized root‐mean‐square error‐based fit metric. Numerical results for two cases of study are presented to see its usefulness for subsurface applications. A MATLAB implementation of the mathematical description outlined in this paper and the proposed evaluation method is freely available for download.

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“…Not only is attenuation important, but also preserving the shape of the generated magnetic field. Often, MI localization relies on the entire vector field (not just its magnitude), either by exploiting its dipole shape [8], [9], or other geometrical properties such as null-field [12], [13], [19]. Therefore, in order to achieve good positioning accuracy, one must either operate in the quasi-static region, whose limit is dictated by the medium characteristics, or ensure that the distortions do not affect the desired geometrical properties of the field beyond the quasi-static limit [12], [13].…”

Section: Introductionmentioning

confidence: 99%

Impact of Rocks and Minerals on Underground Magneto-Inductive Communication and Localization

et al. 2016

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In this paper, we analyze the effect of different underground materials on very-low and low frequency magnetic fields used in the contexts of magneto-inductive localization and communication applications, respectively. We calculate the attenuation that these magnetic fields are subject to while passing through most common rocks and minerals. Knowing the attenuation properties is crucial in the design of underground magnetoinductive communication systems. In addition, we provide means to predict the distortions in the magnetic field that impair localization systems. The proposed work offers basic design guidelines for communication and localization systems in terms of channel path-loss, operation frequencies and bandwidth. For the sake of the reproducibility of the results, we provide the raw data and processing source code to be used by the two research communities.

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Accurately Locating a Vertical Magnetic Dipole Buried in a Conducting Earth

Cited by 28 publications

References 15 publications

A deep insight into avalanche transceivers for optimizing rescue

A deep insight into avalanche transceivers for optimizing rescue

A Computational Channel Model for Magnetic Induction‐Based Subsurface Applications

Impact of Rocks and Minerals on Underground Magneto-Inductive Communication and Localization

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