JP3415302B2 - Vehicle guidance system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle guidance system for guiding a driver to a route to a destination.

[0002]

2. Description of the Related Art For a vehicle that searches for an efficient guide route connecting a designated start point, a target point, and a waypoint that passes before reaching the target point, and provides guidance along the guide route as the vehicle advances. There is an induction device. This type of vehicle guidance device displays a route returning to the off-route point when the vehicle advances to a non-guidance route different from the guidance route (hereinafter referred to as an off route), and after returning to the guidance route, There are those that restart the route guidance and those that resume the route according to the guide route obtained as a result of newly searching the route at the time of off-route.

[0003]

By the way, the waypoints to be set by the driver to be guided are rarely set strictly, and are often set merely as a guide for passing points. In particular, if the driver is familiar with the geography around the waypoint, he may intentionally make an off-route for the purpose of avoiding shortcuts or traffic jams, and may not pass the waypoint. Even in such a case, the conventional vehicle guidance device gives an instruction to return to the original guidance route or performs route guidance along a new guidance route obtained as a result of the re-search. That is, the driver to be guided gives undesired guidance, which is a hindrance to driving especially when the device provides voice guidance.

The present invention has been made under such a background, and a vehicle guidance system which does not perform re-searching of a guidance route and route guidance around the waypoint even if the current travel route is an off route. The purpose is to provide a device.

[0005]

The invention according to claim 1 is
A guide route connecting the set current point, target point, and waypoints that pass before reaching the target point is created, and guidance is provided along the guide route as the vehicle runs, and the vehicle deviates from the guide route. in the induction system for a vehicle to create a new guidance route by re-search if the
When the vehicle is off the guide route,
It is characterized in that the guide route is re-searched when Well
In addition, the invention according to claim 2 is the set current position and target.
Invitation to connect points and transit points that pass before reaching the target point
Create a guide route and follow the guide route as the vehicle travels.
And guide the vehicle from the guidance route.
A vehicle that creates a new guidance route by re-searching if it deviates
In a dual-purpose guidance device, the vehicle is a predetermined distance from the waypoint
Deviating from the guidance route in the area inside,
Re-searching the guide route when traveling a predetermined distance
Is characterized by.

[0006]

According to the invention described in claim 1 , the vehicle is guided by the guidance.
When you travel a certain distance off the route,
Re-search the road. According to the invention of claim 2,
For example, the vehicle is guided in an area within a predetermined distance from the waypoint.
Departing from the route and traveling a predetermined distance outside the area
The guide route is searched again. Therefore, even if the driving route is off route, re-searching of the route is prohibited when traveling around the transit point, so if the driver intentionally off route for the purpose of avoiding traffic congestion, etc. A comfortable route guidance is provided without useless route search or annoying guidance.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a vehicle guidance device according to this embodiment. In FIG. 1, reference numeral 1 denotes an ECU (Electronic Control Unit) which is a control unit, and 2
Is a CPU for controlling various processes, 3 is a RAM for storing processing results of the CPU 2, and 4 is a ROM for storing control programs of the CPU 2. Reference numeral 5 denotes an interface unit, which is a signal indicating a vehicle state such as vehicle speed, forward / back, and lighting state of a vehicle, and GPS (Global Positio).
ning System) The position information (latitude, longitude) from the receiver 6 is received from the outside.

Reference numeral 7 is an S-RAM for storing information such as position information and traveling direction, 8 is a gyro for detecting the traveling direction of the vehicle, 9 is an interface section connected to an external bus, 1
Reference numeral 0 is a CD-ROM drive for reading out various information, and 11 is a VRAM for storing image data. In addition, CD-R
The OM drive 10 includes map drawing data (including character data) that is the basis of the background display, road shape data indicating the coordinates and road width of each point (node) of the road, and route data indicating the distance and speed limit. Remembered

The external bus connected to the interface unit 9 has a TV tuner 12, a radio 13, and a C.
A D-ROM changer 15 and a panel 16 are connected to each other, and the panel 16 includes a display unit 16a including a color liquid crystal display and an operating unit 16b including various operators.
Composed of and.

Next, FIG. 2 is a flow chart showing the main part of the control program of the CPU 1 stored in the ROM 4 (FIG. 1), and FIG. 3 is an operation explanatory diagram of this embodiment. The operation of this embodiment will be described below with reference to FIGS.

First, the driver operates the operator of the operation unit 16b (FIG. 1) to display a desired map image as shown in FIG. 3 on the display unit 16a, and further, the starting point 20 and the target point 21. And the waypoint 22 is set. The CPU 2 searches for a route connecting the starting point 20, the target point 21 and the waypoint 22 according to this setting. By this search, the route with the highest movement efficiency is created in consideration of the route distance, the road width, the number of intersections, etc., and the derived route 2
4 (FIG. 3) is highlighted on the map image.

Here, for displaying the map image, the map image data previously stored in the CD-ROM drive 10 is stored in the VRAM.
It is done by transferring to 11. Further, the display of the guide route is performed by creating a route line image based on the road shape data read from the CD-ROM drive 10 corresponding to the displayed map image, and overwriting it in the VRAM 11.

Next, when the vehicle starts moving, the current position of the vehicle is detected in step S1 (FIG. 2).
This position detection is performed based on the vehicle speed signal input via the interface unit 5, the position information supplied from the GPS receiver 6 and the direction information supplied from the gyro 8, and the result is displayed on the map image of the display unit 16b. Is displayed as an arrow. In step S2, step S1
It is checked whether or not the current position of the vehicle detected in step 3 and the route in progress are the searched guide routes. If the route is a guide route, that is, if the route is not off route, the process proceeds to step 3 to guide the route. While displaying on the display unit 16a,
The speaker 14 outputs a voice such as "I'll be turning right soon" via the radio 13, and the process ends.

On the other hand, for example, in FIG.
In the case where the vehicle has proceeded to the broken line route 26, it is determined that the off route is being performed in the above step S2, and the step S2 is performed.
At 4, the off-route is displayed on the display unit 16a. Next, in step S5, it is determined whether the vehicle to be guided is near the waypoint.

This determination is made based on the vehicle position information detected in step S1 and the preset position information of the waypoint 22, and the radial distance L1 = from the waypoint 22.
When the vehicle to be guided exists in the area 23 of 700 m, it is determined to be near the waypoint. As a result, if it is determined to be near the waypoint, the process ends, and if it is outside the area 23, that is, if the distance from the waypoint 22 exceeds 700 m, the process proceeds to step S6.

In step S6, it is checked whether or not the vehicle has traveled outside the area 23 for the traveling distance L2 = 150 m or more.
If the vehicle returns to the area 23 or the guide route 24 before the vehicle travels m, the process ends. On the other hand, for example, in FIG. 3, when the vehicle travels in the direction 27 and travels the distance L2 or more, the process proceeds to step S7, and the route is re-searched. By this re-search, a new guide route 28 indicated by the alternate long and short dash line is created, and after the route line image is displayed, the process ends.

Also, when the vehicle travels in the direction 29 shown in FIG. 3, for example, and travels a distance L2 or more in an off-route state, the processing proceeds to steps S2, S4, S5 and S6, and the guide route is set at step S7. Will be rediscovered.

The process of the flowchart (FIG. 2) described above is repeatedly executed while reaching the target point 21, and the route guidance is sequentially performed. When the route is re-searched, the guidance is restarted according to the new guidance route obtained by the search. Even when a plurality of waypoints are set, route guidance is performed by the same processing as above.

In the embodiment described above,
Although the distance L1 which is the criterion for determination in the vicinity of the waypoint is 700 m, the distance L1 is not limited to this distance and may be arbitrarily changed. Similarly, the travel distance L2, which is the criterion for re-search, may be set to a distance different from 150 m.

[0020]

As described above, according to the first aspect of the present invention, the vehicle is separated from the guide route by a predetermined distance.
You can re-search the guide route when traveling
It According to the invention of claim 2, the vehicle is a stopover.
In an area within a predetermined distance from the
When traveling a certain distance outside the rear, re-search the guide route
It can be carried out. Therefore, even if the travel route is an off route, re-searching the route is prohibited when the vehicle is traveling within a predetermined range from the waypoint, so the driver intentionally around the waypoint, which is a mere guideline for passing. In the case of off-route, useless route search or annoying guidance is not performed, and more comfortable route guidance can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle guidance device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a main part of a control program of a CPU 2 of the same embodiment.

FIG. 3 is an operation explanatory diagram of the embodiment.

[Explanation of symbols]

1 ECU 2 CPU 3 RAM 4 ROM 5,9 Interface part 6 GPS receiver 7 SRAM 8 gyro 10 CD-ROM drive 11 VRAM 12 TV tuner 13 Radio 14 speakers 15 CD-ROM changer 16 panels 16a display section 16b operation part

─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP-A-5-45170 (JP, A) JP-A-6-66587 (JP, A) JP-A-62-142216 (JP, A) JP-A-5- 40042 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01C 21/00 G08G 1/0969 G09B 29/00-29/10

Claims (2)

(57) [Claims] 1. A guide route that connects a set present point, a target point, and a waypoint that passes before reaching the target point is created, and guidance is provided along the guide route as the vehicle travels. In a vehicle guidance device that creates a new guidance route by re-searching when the vehicle deviates from the guidance route, the vehicle travels a predetermined distance with the vehicle deviating from the guidance route.
It is characterized by re-searching for the guide route when it goes
Vehicle guidance device. 2. The set present point, target point and eye
Create a guide route connecting the waypoints that pass before reaching the landmark
Guides along the guide route as the vehicle travels.
And when the vehicle deviates from the guide route
A vehicle guidance system that creates a new guidance route by re-searching
At The vehicle is guided in an area within a predetermined distance from the waypoint
Departing from the route and traveling a predetermined distance outside the area
Vehicle guidance characterized by re-searching for guidance routes
apparatus.