Affiliations: Graduate School of Informatioin Science and Engineering, The University of Tokyo, Bunkyo, Japan
Correspondence:
[*]
Corresponding author: Takaaki Nara, Graduate School of Informatioin Science and Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo 113-8656, Japan. E-mail:nara@alab.t.u-tokyo.ac.jp
Abstract: In this paper,
we propose to use an avalanche beacon with frequency of 457 kHz
to search for a rescuer buried in rubble in a secondary earthquake disaster.
In an avalanche rescue, a searcher proceeds along the magnetic force lines
generated by the victim's beacon, and always reaches the magnetic field `zero point',
which is guaranteed to be in the proximity of the victim.
In this paper, we show that ferromagnetic objects in rubble
do not substantially affect a zero point search
by theoretical analyses, numerical simulations, and experiments.
Keywords: Inverse problem, beacon, magnetic dipole, zero point, ferromagnetic objects
