{
  "$type": "site.standard.document",
  "description": "A noise pattern acquisition device a position detection apparatus (100) according to an aspect of the present invention includes: a geomagnetic sensor (103); a coordinate estimation unit (107) configured to estimate current position coordinates; and a geomagnetic noise pattern management unit (108)…",
  "path": "/patents/976112",
  "publishedAt": "2014-04-16T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/005",
    "PANASONIC CORP [JP]"
  ],
  "textContent": "A noise pattern acquisition device a position detection apparatus (100) according to an aspect of the present invention includes: a geomagnetic sensor (103); a coordinate estimation unit (107) configured to estimate current position coordinates; and a geomagnetic noise pattern management unit (108) configured to, when an abnormality occurs in a magnetic field strength detected by the geomagnetic sensor (103) during movement of the noise pattern acquisition device (100A), store in a geomagnetic noise pattern storage unit (109) a geomagnetic noise pattern which is a pattern representing a time-series change of the magnetic field strength detected by the geomagnetic sensor (103). This makes it possible to not only acquire a geomagnetic noise pattern but also detect a proper position with a simple structure and process at reduced cost.",
  "title": "GEOMAGNETIC POSITION DETECTION APPARATUS AND GEOMAGNETIC PATTERN ACQUISITION METHOD"
}