JP3145198B2 - Route guidance device for vehicles - 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 route guidance device mounted on a vehicle for guiding a route to a destination, and more particularly to a device for indicating a road to be selected at an intersection or a branch point by display.

[0002]

2. Description of the Related Art Various devices for reducing the burden on the driver have been studied and mounted on vehicles. Among them, a route for guiding along a route to a destination is included. There is a guidance device. This route guidance device has a function of notifying a driver of a route to be selected when passing through an intersection or a branch point, and a display is provided on an instrument panel of a vehicle as being currently provided for practical use. There is a route guidance device provided with an image display device to notify a driver of a route. For example, 61-1
Japanese Patent Application Publication No. 15298 discloses a device which gives an instruction by display when a vehicle reaches a predetermined position before an intersection or a junction where a route is to be notified. According to such route guidance, a driver can reach a destination without looking at an atlas or the like.

[0003]

However, in the above-described apparatus, since the current position of the vehicle is displayed in real time, if there is an error in the measurement of the current position, it is actually before the intersection. Sometimes, it is displayed as if the vehicle is passing by, and there is a problem that the driver feels unnatural.

The present invention has been made to solve the above-mentioned problem, and does not give an unnatural feeling to a driver in the display near an intersection even when the measurement accuracy of the current position is low. An object of the present invention is to provide a route guidance device for a vehicle.

[0005]

In order to achieve the above-mentioned object, a vehicle route guidance apparatus according to the present invention, when approaching the intersection within a predetermined distance, changes the position of the vehicle shown on the display means. It has a discrete display control unit for displaying discretely. The display by the discrete display control unit is
Of the positions of your vehicle that are scattered, the range closest to the intersection
The display position of the vehicle corresponding to the surrounding area is the center position of the intersection
It is. Also, the vehicle position is displayed at the intersection center position.
After that, continue the above display until you pass the intersection
You can do it.

[0006]

According to the present invention, the present position is discretely displayed when approaching an intersection where a route should be selected. That is, in a section within a predetermined distance to the intersection, this section is divided into a plurality of small sections each having one representative position, and the current position of the own vehicle is set to the representative position of the small section where the vehicle is located. indicate.
Then, the vehicle is closest to the intersection where the route should be selected.
When you enter a small section, the display of your vehicle position is crossed
The center position of the point. And this display shows the corresponding intersection
Can be continued until passing.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the present apparatus. A map information storage unit 10 that stores information such as roads, place names, building names, river names, and the like is provided.
The stored map information can be read as needed. Also, a GPS receiver 14 using a satellite navigation system (hereinafter referred to as GPS) for measuring the current position of the vehicle, a direction sensor 16 for detecting the traveling direction of the vehicle based on geomagnetism, a steering angle of the steering wheel A steering sensor 17 for detecting a changed course and a distance sensor 18 for detecting a traveling distance based on the number of rotations of wheels are provided, and the current position measuring unit 12 determines the current position of the own vehicle based on the detection results of these sensors. Determine.

When performing route guidance to the destination, the destination is instructed on the screen of a display unit to be described later by the input unit 19, or the destination is input by the place name or the like. A route from the position to the destination is calculated by the route calculation unit 22 included in the calculation unit 20, and the calculated route is stored in the route storage unit 24.

After inputting the destination and determining the route, actual route guidance is performed. The route guidance control unit 26 included in the calculation unit 20 reads map information around the own vehicle from the map information storage unit 10 and superimposes the current position and traveling direction of the own vehicle on the route stored in the route storage unit 24. Is displayed on the display unit 28.

The display unit 28 is provided in an instrument panel near the driver's seat.
To check the position of the vehicle and obtain information about the future route. FIG. 2 shows an example of this display. In FIG. 2, the selected route is indicated by a thick solid line 100, and other roads are indicated by a thin solid line 102. The position of the host vehicle is indicated by a circle 104 and the traveling direction is indicated by a wedge-shaped arrow 106. For road markings,
The distinction can be made not only by the line thickness but also by changing the color.

At the intersection 10 where the position of the vehicle is to be changed.
When the distance approaches 8, the display screen changes as shown in FIG. 3, and the intersection name 110 and the distance 112 to the intersection are displayed. The route guidance control unit 26 also instructs the voice control unit 30 to generate a voice corresponding to the route guidance at the intersection at the same time as the display switching. The voice control unit 30 reads information stored as digital data in the voice storage unit, converts the information into an analog signal, and drives the speaker 34. Then, the driver gives route guidance to the driver such as "turn left at the next intersection." This voice instruction is performed at predetermined intervals until the vehicle passes through the intersection.

Further, in this embodiment, when the vehicle approaches an intersection to be selected for a route, that is, when an enlarged display near the intersection shown in FIG. 3 is performed, the position of the own vehicle on the enlarged display screen is discretely controlled. The information is discretely displayed on the display unit 26a (FIG. 1). This will be described with reference to FIG. FIG. 4 shows a case where the host vehicle comes from the right side of the paper, turns left at the intersection 108, and travels downward in the paper. As shown in the figure, three small sections A, B, and C are set on the road before the intersection. It is 3 from position of intersection center (0m)
The small section up to 7 m is A, the small section from 37 m to 87 m is B, and the small section over 87 m is C. Normally, when the enlarged display screen as shown in FIG. 3 is displayed, the current position of the own vehicle measured by the current position measuring unit 12 belongs to the section C. At this time, the position of the host vehicle is displayed at the position indicated by 104-1. This position is 100 m from the intersection.
When approaching the intersection further and entering section B, this time 104
Display is performed at the position indicated by -2. This position is 50 m from the intersection. When the vehicle approaches further and enters the section A immediately before the intersection, the own vehicle position is displayed at the intersection center position indicated by 104-3. After passing through the intersection 108, real-time continuous display is performed without performing discrete display as described above.

As described above, in this embodiment, when approaching the intersection, the position (1) that is relatively far from the intersection.
04-1) and the position (104
2) and the position (104-3) immediately before the intersection are displayed. By displaying discretely as described above, the driver does not feel unnatural even if the measurement accuracy of the current position is low. That is, the position of the vehicle is displayed at the center of the intersection until the vehicle actually turns left at the intersection, so that there is no display as if the vehicle has passed the intersection.

[0015]

As described above, according to the present invention, even when the measurement accuracy of the current position is low, the display of the position of the own vehicle with respect to the intersection does not give an unnatural feeling to the driver. In addition, in the case of immediately before an intersection, do the position displayed on the intersection center point, by continuing the display in this position until the intersection passage is confirmed, not yet reached the crossing for passing through the display on the intersection Such unnaturalness can be eliminated.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a preferred embodiment according to the present invention.

FIG. 2 is a diagram illustrating a display example of the apparatus according to the present embodiment.

FIG. 3 is a diagram illustrating a display example of the apparatus according to the present embodiment, particularly illustrating an example of an enlarged display when approaching an intersection where a right or left turn is made;

FIG. 4 is a diagram illustrating a display of the apparatus according to the present embodiment when approaching an intersection.

[Explanation of symbols]

 10 Map information storage unit 12 Current position measurement unit 26a Discrete display control unit

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Akimasa Namba 10 Takane, Fujii-machi, Anjo, Aichi Prefecture Aisin AW Co., Ltd. (72) Inventor Hiroyoshi Masuda 10 Takane, Fujii-machi, Anjo, Aichi Aisin AW Co., Ltd. (56) References JP-A-61-100898 (JP, A) JP-A-62-2825 (JP, A) JP-A-61-115298 (JP, U) (58) Fields investigated ( Int.Cl. ⁷ , DB name) G01C 21/00 G08G 1/0969 G09B 29/10

Claims (2)

(57) [Claims] 1. Displaying the position of the vehicle and map information around the vehicle on a display means according to a preset route, providing guidance on a road to be selected at an intersection, and guiding a route to a destination. a navigation system for a vehicle for performing, when approaching within a predetermined distance to the intersection, it has a discrete display control unit which discretely display the vehicle position indicated on the display means, are the discrete display At the most intersection of your vehicle position
A route guidance device for a vehicle , wherein a near display position is a center position of the intersection . 2. The vehicle route guidance device according to claim 1, wherein the discrete display control unit sets the own vehicle position at an intersection center.
After displaying at the location,
A route guidance device for a vehicle, wherein the position of the own vehicle is kept displayed at the intersection center position .