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Title:
CAR NAVIGATION SYSTEM AND RECORDING MEDIUM
Document Type and Number:
Japanese Patent JPH1151681
Kind Code:
A
Abstract:

To start route guidance smoothly through researching after deviation from a route by determining a guide starting point from the distance required for starting guidance and the road information in the traveling direction depending on the vehicle speed when a vehicle has deviated from a route and then searching a route.

When display output and voice output processing of route guidance is being executed before arriving at a goal, current position of vehicle is acquired through automatic researching (S21), and a decision is made whether a vehicle has deviated from a route (S22) by matching the current position with a route to be guided. When a decision is made whether a vehicle has deviated from a route, route guidance is interrupted (S23) and the distance D along the road (the distance required before starting route guidance according to a researched route) is calculated based on the current traveling speed. A guidance starting point determining means sets a guidance starting point (S26) at point S separated forward from current position by the distance D along the road and then a route researching means researches the route (S27).


Inventors:
WATANABE KAZUYUKI
Application Number:
JP21478097A
Publication Date:
February 26, 1999
Filing Date:
August 08, 1997
Export Citation:
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Assignee:
AISIN AW CO
International Classes:
G09B29/10; G01C21/00; G01C21/36; G06F12/06; G06F19/00; G08G1/0969; (IPC1-7): G01C21/00; G06F12/06; G08G1/0969; G09B29/10
Domestic Patent References:
JPH09126802A1997-05-16
JPH0914984A1997-01-17
JPH05313574A1993-11-26
JPH09152351A1997-06-10
Attorney, Agent or Firm:
Ryuyoshi Abe (7 outside)



 
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