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NAVIGATION APPARATUS

  • US 20090319174A1
  • Filed: 08/28/2009
  • Published: 12/24/2009
  • Est. Priority Date: 03/10/2006
  • Status: Abandoned Application
First Claim
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1. A navigation apparatus comprising:

  • a sensor for detecting a behavior of a vehicle;

    a positioning means for estimating the behavior of the vehicle on a basis of a signal from said sensor;

    a road-map-data storage means for storing road data;

    a road matching means for comparing positioning data sent thereto, as an estimation result, from said positioning means with the road data read from said road-map-data storage means so as to identify a current position of the vehicle, and for judging whether the identification is placed in either a matching state in which there are one or more candidates for an existing position of the vehicle on a registered road shown by said road data or a free state in which the current position of the vehicle is finally identified as being out of any registered road, and then outputting matching result data indicating the state of the identification, and for outputting position candidate data indicating candidates for the existing position of the vehicle on registered roads when the state of the identification is the matching state;

    an unregistered road detecting means for selecting, as a detection start point on a registered road and a detection end point on a registered road for an unregistered road, two candidates from the candidates for the existing position of the vehicle on registered roads, which are shown by the position candidate data from said road matching means, and for outputting travel path data about a travel path from said detection start point to said detection end point, which is created on a basis of the positioning data from said positioning means; and

    a road data generating means for creating road data about the unregistered road on a basis of coordinates of the unregistered road created by said unregistered road detecting means, and for storing the created road data in said road-map-data storage means.

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