Navigation system
a navigation system and navigation unit technology, applied in the field of navigation systems, can solve the problem that the driver who uses the navigation unit cannot judg
Inactive Publication Date: 2010-11-09
AISIN AW CO LTD
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Benefits of technology
[0007]It is an object of the present invention to solve the problems of the conventional navigation unit so as to provide a navigation system that, when a host vehicle enters an acceleration lane that will merge with a main thoroughfare, provides guidance selected based on information about the host vehicle and information about other vehicles, so that the user can change lanes to enter the main thoroughfare, safely and without worry.
[0009]According to the present invention, when the host vehicle enters the acceleration lane that merges with the main thoroughfare, the navigation system executes a type of merging support guidance that is selected based on information about the host vehicle and information about another vehicle of concern with regard to merging. Therefore, the user can change lanes into the main thoroughfare safely and without worry.
Problems solved by technology
However, in the conventional navigation unit, guidance information is provided only regarding the length of the acceleration lane, and not regarding the circumstances of other vehicles traveling on the main thoroughfare.
Therefore, it is not possible for the driver who uses the navigation unit to judge whether or not the vehicle can safely change lanes, i.e. move from the acceleration lane to the main thoroughfare.
Method used
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Embodiment Construction
[0016]An embodiment of the present invention will be explained in detail below with reference to the drawings.
[0017]FIG. 1 shows a navigation system 10 according to the present embodiment as including an electronic control unit (ECU) 11 that is installed in a host vehicle and serves as a navigation control unit. The ECU 11 is a type of computer that is provided with a processor (computation means) such as a CPU, an MPU, or the like, and a memory, such as a semiconductor memory, magnetic disk, optical disk, or the like. Here, the host vehicle may be any type of vehicle capable of traveling on a road, such as a passenger car, a truck, a bus, a motorcycle, or the like, but in this embodiment, for ease of explanation, the host vehicle is described as a four-wheel passenger car driven by a driver who is the user of the navigation system 10.
[0018]The navigation system 10 also includes a vehicle ECU 12, a Global Positioning System (GPS) sensor 13, a gyroscopic sensor 14, a map database 15,...
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A navigation system includes data storage that contains map data, a current position detection portion that detects a current position of a host vehicle, an acceleration lane remaining distance determination portion that determines a distance from the current position to the end of an acceleration lane where it merges with a main thoroughfare, based on the map data and the current position of the host vehicle, a merging support guidance selection portion that selects a type of merging support guidance for supporting the merging of the host vehicle from the acceleration lane into the main thoroughfare, based on information for the host vehicle in the acceleration lane, information for another vehicle so located on the main thoroughfare as to be accounted for in merging, and the distance from the current position to the end of the acceleration lane, and a guidance execution portion that executes the selected merging support guidance.
Description
INCORPORATION BY REFERENCE[0001]The disclosure of Japanese Patent Application No. 2005-227783 filed on Aug. 5, 2005, including the specification, drawings and abstract is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a navigation system.[0004]2. Description of the Related Art[0005]Conventionally, with a navigation unit that is mounted in a vehicle such as an automobile or the like, when the vehicle approaches an intersection or the like on the planned route, the navigation unit provides guidance by displaying arrows on a screen indicating going straight ahead, turning right, turning left, or the like, and / or by outputting the same information by voice. Also, a navigation unit has been proposed (e.g., Japanese Patent Application Publication No. JP-A-11-311535) that, when the vehicle enters an access road that will merge with the main thoroughfare of an expressway or the like, provides ...
Claims
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IPC IPC(8): G08G1/16
Inventor OKABE, HIDEFUMI
Owner AISIN AW CO LTD