Navigation system for automotive vehicle including feature of updating vehicle position at selected points along preset course
First Claim
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1. A navigation system for an automotive vehicle comprising:
- first means for monitoring vehicle motion and deriving first data indicative of vehicle position;
second means for monitoring the direction of travel of the vehicle and driving second data indicative of the vehicle travel direction;
third means for storing a map which includes a plurality of known points;
fourth means for selecting a route for the vehicle and storing the selected routine, said fourth means storing third data indicative of designated known points along said route and a predetermined condition for detecting when the vehicle reaches each of said designated known points;
fifth means for displaying said map stored in said third means, and a symbol representing the vehicle position and a trace of vehicle travel on said map; and
sixth means for setting a travel zone between successive designated known points, said sixth means including display means for displaying an instantaneous position of said vehicle, said sixth means monitoring vehicle position within said travel zone, said sixth means further including detection means for detecting when said predetermined condition is satisfied and in response updating said travel zone by setting a new travel zone between said vehicle position and a subsequent next one of said successive designated known points, erasing said trace of vehicle travel and redrawing said symbol of the vehicle position at a next one of said successive designated known points.
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Abstract
A navigation system includes a display control for controlling a display monitor on which a road map and a trace of the vehicle position are to be displayed. The navigation system also includes means for detecting when the vehicle reaches a known point on a preset route. The display control is responsive to detection of the vehicle reaching the known point to erase the displayed trace and set the vehicle position to that of the corresponding known point on the displayed map.
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Citations
17 Claims
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1. A navigation system for an automotive vehicle comprising:
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first means for monitoring vehicle motion and deriving first data indicative of vehicle position; second means for monitoring the direction of travel of the vehicle and driving second data indicative of the vehicle travel direction; third means for storing a map which includes a plurality of known points; fourth means for selecting a route for the vehicle and storing the selected routine, said fourth means storing third data indicative of designated known points along said route and a predetermined condition for detecting when the vehicle reaches each of said designated known points; fifth means for displaying said map stored in said third means, and a symbol representing the vehicle position and a trace of vehicle travel on said map; and sixth means for setting a travel zone between successive designated known points, said sixth means including display means for displaying an instantaneous position of said vehicle, said sixth means monitoring vehicle position within said travel zone, said sixth means further including detection means for detecting when said predetermined condition is satisfied and in response updating said travel zone by setting a new travel zone between said vehicle position and a subsequent next one of said successive designated known points, erasing said trace of vehicle travel and redrawing said symbol of the vehicle position at a next one of said successive designated known points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A process for navigation of a vehicle along a preset route comprising the steps of:
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providing a road map with data for a plurality of known points along a route; displaying said road map on a visual display screen; presetting a route across said map and designating known points along the preset route; defining a travel zone between a first starting designated known point and a second designated known point along said route; monitoring vehicle travel distance within said travel zone and detecting when the vehicle approaches to within a first given area of said second designated known position; displaying a symbol indicative of the instantaneous vehicle position and a trace of vehicle position through said travel zone; monitoring vehicle position within a second given area for comparison with a predetermined criterion for detecting when the vehicle coincides with said second designated known point; shifting vehicle position indicative symbol to said second designated known point on the display and erasing said vehicle trace; and redefining said travel zone by taking the second designated known point which currently coincides with said vehicle as said first designated known point and selecting a neighboring designated known point as said second designated known point. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification