Navigation apparatus for vehicle
First Claim
1. A navigation apparatus for a vehicle being provided with a travelling distance detection means, an azimuth detection means for detecting a traveling direction of said vehicle, a map memory for storing therein map information relating to a traveling route of said vehicle, a display unit and display control means therefor which reads out the map information from said map memory and graphically displays said map information on said display unit, and a present location computation means which computes present location information of said vehicle on a basis of detection results of said traveling distance detection means and the azimuth detection means and displays said present location information on an image of said display unit, comprising;
- an input means for introducing therein a place name and coordinates of longitude and latitude of an arbitrary spot as spot information thereof;
a spot memory for storing therein said spot information;
a stoppage duration detection means for detecting a continuous stoppage duration of said vehicle;
a closest spot search means for searching said spot memory for a spot closest to the present location computed by said present location computation means;
a distance computation means which reads out from said spot memory said coordinates of longitude and latitude found by said closest spot search means so as to compute a distance between said coordinates and said present location computed by said present location computation means; and
a present location correction means which reads out from said spot memory the coordinates of longitude and latitude of the place found by said closest spot search means and replaces the present location information with said coordinates, when the distance computed by said distance computation means is smaller than a predetermined value and the stoppage duration detected by said stoppage duration detection means is greater than a predetermined duration.
1 Assignment
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Accused Products
Abstract
A navigation apparatus for a vehicle comprising means for previously introducing and storing the coordinate data and place names of a plurality of spots and means for computing the present location of the vehicle, so that the position and place name of a spot close to the present location of the vehicle are displayed, and the present location of the vehicle may be set by introducing the place name when the vehicle is positioned at any one of the close spots, and a spot, such as a garage, where the vehicle usually parks for along time is pre-registered, so that, when the vehicle is positioned at the registered spot, a switch is operated, and, when the vehicle stops at the spot for a predetermined duration or more or over a duration including a predetermined interval, the locational data of the registered spot is taken as the present location of the vehicle, thereby correcting accumulated errors at the present location of the vehicle.
31 Citations
4 Claims
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1. A navigation apparatus for a vehicle being provided with a travelling distance detection means, an azimuth detection means for detecting a traveling direction of said vehicle, a map memory for storing therein map information relating to a traveling route of said vehicle, a display unit and display control means therefor which reads out the map information from said map memory and graphically displays said map information on said display unit, and a present location computation means which computes present location information of said vehicle on a basis of detection results of said traveling distance detection means and the azimuth detection means and displays said present location information on an image of said display unit, comprising;
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an input means for introducing therein a place name and coordinates of longitude and latitude of an arbitrary spot as spot information thereof; a spot memory for storing therein said spot information; a stoppage duration detection means for detecting a continuous stoppage duration of said vehicle; a closest spot search means for searching said spot memory for a spot closest to the present location computed by said present location computation means; a distance computation means which reads out from said spot memory said coordinates of longitude and latitude found by said closest spot search means so as to compute a distance between said coordinates and said present location computed by said present location computation means; and a present location correction means which reads out from said spot memory the coordinates of longitude and latitude of the place found by said closest spot search means and replaces the present location information with said coordinates, when the distance computed by said distance computation means is smaller than a predetermined value and the stoppage duration detected by said stoppage duration detection means is greater than a predetermined duration.
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2. A navigation apparatus for a vehicle being provided with a travelling distance detection means, an azimuth detection means for detecting a traveling direction of said vehicle, a map memory for storing therein map information relating to a traveling route of said vehicle, a display unit and display control means therefor which reads out the map information from said map memory and graphically displays said map information on said display unit, and a present location computation means which computes present location information of said vehicle on a basis of detection results of said traveling distance detection means and the azimuth detection means and displays said present location information on an image of said display unit, comprising:
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an input means for introducing therein a place name and coordinates of longitude and latitude of an arbitrary spot as spot information thereof; a spot memory for storing therein said spot information; a stoppage duration detection means for detecting a continous stoppage duration of said vehicle; a closest spot search means for searching said spot memory for a spot closest to the present location computed by said present location computation means; a distance computation means which reads out from said spot memory said coordinates of longitude and latitude found by said closest spot search means so as to compute a distance between said coordinates and said present location computed by said present location computation means; and a present location correction means which reads out from said spot memory the coordinates of longitude and latitude of the place found by said closest spot search means and replaces the present location in formation with said coordinates, when the distance computed by said distance computation means is smaller than a predetermined value and said stoppage duration detection means detects a stoppage duration which overlaps an interval having a predetermined start time and a predetermined end time.
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3. A navigation apparatus for a vehicle being provided with a travelling distance detection means, an azimuth detection means for detecting a traveling direction of said vehicle, a map memory for storing therein map information relating to a traveling route of said vehicle, a display unit and display control means therefor which reads out the map information from said map memory and graphically displays said map information on said display unit, and a present location computation means which computes present location information of said vehicle on a basis of detection results of said traveling distance detection means and the azimuth detection means and displays said present location information on an image of said display unit, comprising:
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an input means for introducing therein place name and coordinates of longitude and latitude of an arbitrary spot as spot information thereof; a spot memory for storing therein said spot information; a stoppage duration detection means for detecting a continuous stoppage duration of said vehicle; a closest spot search means for searching said spot memory for a spot closest to the present location computed by said present location computation means; a distance computation means which reads out from said spot memory said coordinates of longitude and latitude found by said closest spot search means so as to compute the distance between said coordinates and said present location computed by said present location computation means; an automatic present location correction means which reads out from said spot memory the coordinates of longitude and latitude of the place found by said closest spot search means and replaces the present location information with said coordinates, when said distance computed by said distance computation means is smaller than a first reference value and the stoppage duration detected by said stoppage duration detection means exceeds a predetermined duration; an inquiry means for inquiring of an operator whether the present location information is to be replaced with said coordinates found by said closest spot search means, when the distance computed by said distance computation means is between said first reference value and a second reference value larger than said first reference value and the stoppage duration detected by said stoppage duration detection means exceeds a predetermined duration; and a manual present location correction means which replaces the present location information with said coordinates in response to an affirmative response by said operator.
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4. A navigation apparatus for a vehicle being provided with a travelling distance detection means, an azimuth detection means for detecting a traveling direction of said vehicle, a map memory for storing therein map information relating to a traveling route of said vehicle, a display unit and display control means therefor which reads out the map information from said map memory and graphically displays said map information on said display unit, and a present location computation means which computes present location information of said vehicle on a basis of detection results of said traveling distance detection means and the azimuth detection means and displays said present location information on an image of said display unit, comprising:
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an input means for introducing therein place name and coordinates of longitude and latitude of an arbitary spot as spot information thereof; a spot memory for storing therein said spot information; a stoppage duration detection means for detecting a continuous stoppage duration of said vehicle; a closest spot search means for searching said spot memory for a spot closest to the present location computed by said present location computation means; a distance computation means which reads out from said spot memory said coordinates of longitude and latitude found by said closest spot search means so as to compute a distance between said coordinates and said present location computed by said present location computation means; an automatic present location correction means which reads out from said spot memory the coordinates of longitude and latitude of the place found by said closest spot search means and replaces the computed present location information with said coordinates, when the distance computed by said distance computation means is smaller than a first reference value and said stoppage duration detection means detects a stoppage duration which overlaps an interval having a predetermined start time and a predetermined end time; an inquiry means for inquiring of an operator whether the present location information is to be replaced with said coordinates found by said closest spot search means, when the distance computed by said distance computation means is between said first reference value and a second reference value larger than said first reference value and the said stoppage duration detection means detects a stoppage which overlaps said interval; and a manual present location correction means replaces the present location information with said coordinates in response to an affirmative response by said operator.
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Specification