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Noise pattern acquisition device and position detection apparatus provided therewith

  • US 8,996,298 B2
  • Filed: 05/29/2012
  • Issued: 03/31/2015
  • Est. Priority Date: 06/13/2011
  • Status: Active Grant
First Claim
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1. A noise pattern acquisition device comprising:

  • a geomagnetic sensor;

    a coordinate estimation unit configured to estimate current position coordinates representing a current position of the noise pattern acquisition device; and

    a geomagnetic noise pattern management unit configured to, when an abnormality occurs in a magnetic field strength detected by the geomagnetic sensor during movement of the noise pattern acquisition device, store a geomagnetic noise pattern in a recording medium in association with the current position coordinates estimated by the coordinate estimation unit when the abnormality occurs, the geomagnetic noise pattern being a pattern representing a time-series change of the magnetic field strength detected by the geomagnetic sensor, the time-series change of the magnetic field strength being caused by the movement of the noise pattern acquisition device.

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