{
  "$type": "site.standard.document",
  "description": "An own position estimation device includes: a position information acquisition unit in a vehicle; a first memory in which encrypted map information is stored; a microcomputer that reads the map information, performs calculation based on information obtained from the position information acquisition…",
  "path": "/patents/1379657",
  "publishedAt": "2026-03-19T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/28",
    "HITACHI ASTEMO, LTD."
  ],
  "textContent": "An own position estimation device includes: a position information acquisition unit in a vehicle; a first memory in which encrypted map information is stored; a microcomputer that reads the map information, performs calculation based on information obtained from the position information acquisition unit, and outputs driving assistance information; and a second memory that retains the map information and current position information transferred by the microcomputer. The position information acquisition unit, the first memory, and the second memory are connected to the microcomputer through a communication line, and the second memory is a non-volatile memory of the vehicle, and stores own position information, encrypted peripheral map information, and decrypted peripheral map information during an operation of the vehicle.",
  "title": "OWN POSITION ESTIMATION DEVICE"
}