JP3307192B2 - Vehicle navigation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vehicle mounted on a vehicle,
The present invention relates to a vehicular navigation device for searching for a shortest route from a departure point to a destination, and more particularly to an intersection diagram display method that supports smooth operation of an intersection.

[0002]

2. Description of the Related Art In a conventional navigation device mounted on a vehicle, when an intersection is displayed, an enlarged view near the intersection is previously provided as drawing data, and an arrow is displayed on the enlarged view near the intersection. A display method for providing road guidance at an intersection is known.

In recent years, various navigation devices mounted on vehicles have been proposed (for example, Japanese Patent Application Laid-Open No. Sho 62-51000, Japanese Patent Application Laid-Open No. Hei 1-173).
298, JP-A-2-7599098, etc.).

[0004]

However, at present, such intersections are not displayed in a detailed manner as the vehicle travels.

Therefore, the present invention changes the display of the intersection diagram of the navigation device mounted on the vehicle in accordance with the progress of the actual intersection of the vehicle, and provides a comfortable display with a fine-grained display suitable for the actual operation. It is another object of the present invention to provide a vehicle navigation device that can support smooth operation.

[0006]

To achieve the above object, the present invention provides: (1) a navigation device mounted on a vehicle,
(A) When the vehicle reaches a first predetermined distance before the intersection,
First remaining distance display means for displaying a distance from the vehicle to the intersection on a part of the screen and displaying an arrow indicating a route; and (b) a second traveling distance before the intersection when the vehicle further travels.
(C) the remaining distance display means for deleting and displaying the length of the arrow indicating the route in accordance with the advance of the vehicle, instead of displaying the distance when the predetermined distance is reached. )
The color of the arrow indicating the route in
The color of the arrow is different from the color of the arrow indicating the port .

(2) In the vehicle navigation device, an information storage means for storing map information, a current position detection means for detecting a current position, an input means for inputting a destination, a search condition, and the like, A route calculation unit for calculating a route to a destination based on the information input by the input unit based on the map information of the information storage unit; and a route calculation unit for storing the route calculated by the route calculation unit. Route storage means, and route guidance means for reading and providing route information by the route storage means based on the current position detected by the current position detection means, wherein the route guidance means comprises a current position When the distance from the intersection reaches a first predetermined distance, first remaining distance display means for displaying the remaining distance to the intersection, and when the current position is the distance from the intersection, When a second predetermined distance is reached,
If the remaining distance to the intersection and the first remaining distance display means; and a second remaining distance display means for displaying in a different form DOO
The form of the remaining distance display of the second remaining distance display means
Corresponds to the arrow of the first remaining distance display means.
The display is changed in color .

(3) In the vehicle navigation device according to the above ( 2 ), the first remaining distance display means performs an arrow display indicating a route and a distance display indicating a remaining distance to an intersection, and the second remaining distance display means. The remaining distance display means deletes the distance display displayed by the first remaining distance display means, and changes the length of the arrow display indicating the route with the movement of the current position.

[0009]

As described above in detail, according to the present invention, in the intersection diagram display method of the navigation device mounted on the vehicle, the display of the intersection diagram is performed according to the actual progress of the intersection of the vehicle. It is possible to support comfortable and smooth operation with fine-grained display adapted to actual operation.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

Hereinafter, a system configuration of a navigation device to which the present invention is applied will be described.

FIG. 3 is a system configuration diagram of a navigation device to which the present invention is applied.

This navigation device is mounted on a vehicle, and as shown in FIG. 1, a current position detection device 10, an information processing control device 20, an input / output device 40, and an information storage device 5
It has zero.

First, the current position detecting device 10 has the following configuration.

The absolute azimuth sensor 11 is a geomagnetic sensor for detecting in which direction the vehicle is located from detection in N directions based on a magnet, for example, and may be any means for detecting the absolute direction.

The relative direction sensor 12 detects, for example, whether the vehicle has turned at an intersection or not, and may be an optical rotation sensor attached to a rotating portion of a steering wheel, a rotary resistance volume, or an angle sensor attached to a wheel portion. . In addition, a gyro sensor that detects a change in angle using an angular velocity may be used. That is, any means can be used as long as it can detect an angle relatively changed with respect to the reference angle (absolute azimuth). The distance sensor 13 may be, for example, a sensor that detects and counts the rotation of a wheel, or a sensor that detects acceleration and integrates twice. That is, any means that can measure the moving distance of the vehicle may be used.

The GPS (global positioning system) receiving device 14 is a device for receiving a signal from an artificial satellite, and includes a signal transmission time, a position information of the receiving device,
Various information such as the moving speed of the receiving device and the traveling direction of the receiving device can be obtained. The beacon receiving device 15 is a device that receives a signal transmitted from a transmitting device installed at a specific point. In particular, it is possible to obtain VICS information, and to obtain information related to the traveling of the vehicle, such as traffic congestion information, current position information, and parking lot information.

The data transmission / reception device 16 communicates with the outside of the vehicle using a telephone line or radio waves to exchange information. For example, car phone, ATIS, VIC
There are various usage methods, such as S, GPS correction, and inter-vehicle communication, and it is possible to input and output information about traveling.

Next, the information processing control device 20 performs calculation and control based on information input from the current position detection device 10 and the input / output device 40 and information stored in the information storage device 50. The display 42,
This is means for controlling output to output means such as the printer 43 or the speaker 44.

The information processing control device 20 has the following configuration.

A central processing unit (CPU) 21 performs overall computation and control of the entire navigation device. 1st R
OM22 is a navigation program, especially
It stores a navigation program for detecting the current position, searching for a route, displaying guidance, and the like. The sensor input interface 23 is a unit that receives information from the current position detecting device 10.

The RAM 24 stores information input by the user, such as destination information and passing point information input by the input device 41 described later, and is calculated by the CPU 21 based on the input information of the user. This is storage means for storing a result, a result of a route search, or map information read from the storage information device 50. The communication interface 25 is a unit for inputting and outputting information from the current position detecting unit 10, particularly, information obtained from outside.

The second ROM 26 stores a program relating to navigation, in particular, a navigation program relating to voice guidance. The image processor 27
This is processing means for processing vector information processed by the CPU into image information. The clock 28 keeps time. The image memory 29 is means for storing image information processed by the image processor. The audio processor 30 processes the audio information read from the information storage device,
44 .

The input / output device 40 is connected to a destination by a user.
Input device 41 for inputting data such as passing points and search conditions
Having, for example, a touch switch, a joystick,
A display 4 that is a key switch or the like and displays an image.
2, the printer 43 to print the information, composed of sp e <br/> over mosquito 44 that outputs audio.

The information storage device 50 is connected to the information processing control device 20 via a transmission line 45. Information storage device 50
Are the map data file 51 and the intersection data file 5
2, node data file 53, road data file 5
4. Photo data file 55, destination data file 5
6, a guide point data file 57, a detailed destination data file 58, a destination reading data file 59, and other data files 60 are stored. The information storage device 50 generally includes a CD-RO which is an optical magnetic medium.
M, an IC card, or the like, but may be a magnetic storage medium such as a floppy disk.

The navigation device is achieved by the above configuration, and reads map information from the information storage device 50 based on the current position detected by the current position detection means and displays the map information on the display. Further, when a destination is input, a route from the current position to the destination is calculated by the information processing control device 20, and the current position detection device 10
(For example, a GPS receiver, a relative azimuth sensor, and a distance sensor) to provide a route guidance by tracking a current position detected by the sensor.

For example, in the middle of a route having a long distance to the next intersection, in order to give the driver a sense of security that he / she is not deviating from the route, a photograph of the passing feature is read from the photograph data file 55, and is displayed on the screen. Etc. Alternatively, the map data file 51 is read, the guide map and the position of the vehicle are displayed, and the traveling position on the route is notified. Then, when the intersection is near, the intersection data file 52 is read, and the intersection is drawn and output.

For example, when there is a road network including intersection numbers I to VII and road numbers (1) to (14) as shown in FIG. 4, for example, as shown in FIG. Has the next road number (11) with the same start point, has the next road number (4) with the same end point, the intersection is the intersection number II, the end is the intersection number I, the node column pointer A000, the road Length 1
000m. In this way, the road number can be sequentially defined, and the road network can be defined.

FIG. 5 is a diagram showing data on intersections. As shown in FIG. 5 (a), for each intersection, an intersection number, intersection coordinates (East / North latitude), connection road information, landmark (mark pattern) The data address, size, and the like are given. As shown in FIG. 5B, the landmark (mark pattern) data includes landmark coordinates (East / North latitude), a mark pattern number, and a facing road number (the landmark is located at the corner of the intersection) for each landmark. If it is located, two road numbers are stored). The mark pattern number is, for example, as shown in FIG.
“0” is XX bank mark drawing data, “1” is ◇◇ bank mark drawing data, “2” is □□ bank mark drawing data, “3” is GS mark drawing data, 4 is ▽▽ GS
Use mark drawing data.

FIG. 7 is a diagram showing the structure of road data according to the present invention (part 1), FIG. 8 is a diagram showing the structure of road data according to the present invention (part 2), and FIG. It is road data. For each road, for example, as shown in FIGS. 4 and 6, for each road number (1) to (14), length, road attribute data (see FIG. 8A), shape data It has an address, a size, a guidance data address, and a size.
As shown in FIG. 7B, for example, it has east longitude and north latitude data. As shown in FIG. 7C, the guidance data includes an intersection name, the presence or absence of a traffic light, landmark data,
It has attention data, road name, road name voice data address, size, destination data address, and size.

Further, as shown in FIG. 7 (d), the destination data includes a destination road number, a destination name, a destination name voice data address, a size, a destination direction data, a travel guide data, and the like. The destination direction data is shown in FIG.
As shown in (e), -1: invalid, 0: unnecessary, 1: straight ahead, 2: right direction, 3: diagonal right direction, 4: right return direction,
5: Left direction, 6: Diagonal left direction, 7: Data returning to the left.

Further, as shown in FIG. 8 (a), for example, as shown in FIG. 8 (a), the above-mentioned road attribute data includes data on an overpass / overpass, next to an overpass, underpass, underpass, etc. It has data such as two or more lanes, one lane, and no center line.

The road name data is, for example, as shown in FIG.
As shown in (b), it has a road type and a type number,
Road types include expressways, urban highways, toll roads,
General roads are divided into national roads, prefectural roads, and other roads. The expressway is set to "1" if it is a main road, and "2" if it is an attachment (branch road) connected to the next road. The numbers are given below.

Further, as shown in FIG. 8 (c), the caution data includes a level crossing, a tunnel entrance, a tunnel exit, a width reduction point, and none.

FIG. 8 shows the travel guidance data.
As shown in (d), there are right, left, center, and none.

Next, a basic navigation processing method will be described.

FIG. 9 is a flowchart showing the basic processing of navigation according to the present invention.

First, the current position detected by the current position detecting device is detected (step S21). Next, a destination input process is performed (step S22). The input processing of the destination can be performed, for example, on a menu screen displayed from the input device 41. Alternatively, the input can be made by telephone number.

Next, a process for searching for a route to the destination is performed based on the current position detected by the current position detection process and the destination input by the destination input process (step S23). More specifically, a node on the road closest to the coordinates of the input destination is calculated. A route search process is performed on the route from the current position to the calculated node based on search conditions (for example, the shortest distance, the shortest time, the priority of a toll road, the ease of traveling, and the like). Then, according to route searched by the route search processing, the present position detecting means (e.g., GPS, gyro sensor, a distance sensor or the like) from the detection result of, on the basis of the movement of the current position, execute route guidance (step S24).

Hereinafter, an intersection diagram display method of the navigation device according to the present invention will be described.

FIG. 1 is an explanatory view of an intersection diagram display method of a navigation device according to an embodiment of the present invention.
Is an intersection diagram display diagram showing the first remaining distance display,
FIG. 1B is an intersection diagram display diagram showing the second remaining distance display. FIG. 2 is an intersection display flowchart of the navigation device.

In FIG. 1A, 1 is an intersection diagram, 2 is a gas station as a landmark near the intersection,
Reference numeral 3 denotes a place name display unit, 4 denotes a remaining distance display unit in the first remaining distance display, 5 denotes a vehicle position display mark in the first remaining distance display, and 6 denotes a route at an intersection in the first remaining distance display. Arrows (there is no change in the length of the arrow as the vehicle travels).

In FIG. 1B, reference numeral 7 denotes a vehicle position display mark in the second remaining distance display, and reference numeral 8 denotes a remaining distance display in the second remaining distance display and an arrow (route of the vehicle) indicating the route at the intersection. The length of the arrow changes with progress).

As described above, when the distance to the intersection of the vehicle becomes the first predetermined distance, for example, 300 m, FIG.
As shown in (1), a first remaining distance display is performed. That is, in the first remaining distance display, the distance of the vehicle from the intersection is displayed on the remaining distance display unit 4 in the form of a bar graph. The bar graph changes as the vehicle moves. For example, displaying blue on the background,
On top of that, yellow is displayed for the length of the remaining distance, and as much as the vehicle has moved, it may be erased from blue on the background color blue, or the display may be rewritten as it moves. good. In this way, by shortening the display of the bar graph, it is possible to visually recognize that the vehicle is approaching the intersection. At the same time, the route at the intersection is displayed by the arrow 6. However, in the display at this stage, the position display mark of the vehicle is fixed, and the length itself of the arrow 6 indicating the route does not change as the vehicle advances.

Next, when the distance to the intersection of the vehicle becomes a second predetermined distance, for example, 150 m, a second remaining distance is displayed as shown in FIG. 1 (b). That is, the display by the remaining distance display unit 4 is deleted. For example, the remaining distance display section 4 can be erased by painting in the same color as the background color or by rewriting the intersection diagram screen so that the remaining distance display section 4 cannot be written. Instead of displaying the remaining distance, the remaining distance is displayed by an arrow 8. In other words, the position indicator of the vehicle moves as the vehicle progresses, and the base of the arrow 8 is gradually erased and shortened so as to indicate the remaining distance to the intersection, thereby accurately expressing the approach to the intersection. Can be.

Further, when the second predetermined distance is reached, by changing the display color of the arrow, it is possible to easily recognize that the remaining distance is within the second predetermined distance. The color may be changed by simply changing the color palette to be displayed, or by changing the color of the arrow and displaying again. For example, when the first remaining distance is displayed, the arrow is displayed in green, and in the second remaining distance display, the arrow is displayed in yellow.
It can be easily recognized that the vehicle has entered the second remaining distance display area.

Hereinafter, a specific example of an intersection diagram displayed by a navigation device will be described with reference to FIGS.

(1) First, the coordinates of the node on the road closest to the coordinates of the destination input from the input device 41 are searched, and the corresponding node is set as a temporary destination (final guide point) ( Step S1).

(2) Next, the current position detected by the current position detecting means and the tentative destination and the search conditions input by the input means (passing point, priority of toll road, shortest route, easily runnable road) And the like, the route to the destination is searched (step S2).

(3) The current position is obtained from the current position detecting means (step S3).

(4) It is determined from the obtained current position and the coordinates of the destination whether the vehicle has arrived at the destination (step S).
4).

(5) If it is determined that the vehicle has not reached the destination, the distance to the next intersection requiring guidance is 30.
It is determined whether the distance is within 0 m (step S5). That is, it is determined whether the first predetermined distance has been reached.

(6) If YES in step S5, it is determined whether the distance to the next intersection is within 150 m (step S6). That is, it is determined whether the second predetermined distance has been reached.

(7) If YES in step S6, it is checked whether or not the intersection map of the second remaining distance display area is being displayed (step S7).

(8) If NO in step S7, an intersection diagram of the second remaining distance display area is displayed (step S8).

(9) Next, the intersection map display of the second remaining distance display area is updated and displayed from the remaining distance (step S9).

(10) In step S6, if the distance to the next intersection is not less than 150 m, that is,
If the distance to the next intersection is less than 300 m to less than 150 m, it is checked whether or not the intersection map is being displayed in the first remaining distance display area (step S10).

(11) In step S10, N
In the case of O, the intersection map display of the first remaining distance display area is performed (step S11).

(12) Next, the first remaining distance display is updated from the remaining distance display (step S12).

(13) In the step S5, NO
In the case of, it is checked whether or not the intersection diagram is being displayed (step S13).

(14) In step S13, Y
In the case of ES, a map is displayed (step S14).

Thereafter, when the vehicle passes through the intersection, the process returns to step S3.

In the present invention, when the current position of the vehicle with respect to the intersection becomes the first predetermined distance and the second predetermined distance, the display form of the remaining distance is changed so that the user can easily view the remaining distance. This provides a good guidance display.

The present invention is not limited to the above-described embodiment, but various modifications are possible based on the spirit of the present invention, and they are not excluded from the scope of the present invention.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an intersection diagram display method of a navigation device according to an embodiment of the present invention.

FIG. 2 is an intersection display flowchart of the navigation device according to the embodiment of the present invention.

FIG. 3 is a system configuration diagram of a navigation device to which the present invention is applied.

FIG. 4 is an explanatory diagram of a definition of a road network of the navigation device according to the present invention.

FIG. 5 is an explanatory diagram of intersection data of the navigation device according to the present invention.

FIG. 6 is an explanatory diagram of a road network and a route search of the navigation device according to the present invention.

FIG. 7 is an explanatory diagram of road data (part 1) of the navigation device according to the present invention.

FIG. 8 is an explanatory diagram of road data (No. 2) of the navigation device according to the present invention.

FIG. 9 is an explanatory diagram of a basic processing flow of navigation according to the present invention.

[Description of Signs] 1 intersection Figure 2 Gasoline station as a landmark near the intersection
Command 3 place name display unit 4 first remaining distance remaining distance display section 5 first route at the intersection at the position indication mark 6 first remaining distance display of the vehicle at the remaining distance display on the display
The remaining distance display and the intersection at the position indication mark 8 second remaining distance display of the vehicle at the arrow 7 the second remaining distance display for displaying
Arrow for displaying route 10 Current position detecting device 11 Absolute direction sensor 12 Relative direction sensor 13 Distance sensor 14 GPS receiving device 15 Beacon receiving device 16 Data transmitting and receiving device 20 Information processing control device 21 Central processing unit (CPU) 22 First ROM 23 Sensor input interface 24 RAM 25 Communication interface 26 Second ROM 27 Image processor 28 Clock 29 Image memory 30 Audio processor 40 Input / output device 41 Input device 42 Display 43 Printer 44 Speaker 45 Transmission path 50 Information storage device 51 Map data file 52 Intersection data file 53 Node data file 54 Road data file 55 Photo data file 56 Destination data file 57 Guide point data file 58 Detailed destination data Datafile 59 destination reading data file 60 other data files

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-66573 (JP, A) JP-A-6-147909 (JP, A) JP-A-7-174578 (JP, A) 303334 (JP, A) JP-A-6-68386 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01C 21/00 G08G 1/0969 G09B 29/10

Claims (3)

(57) [Claims] 1. A navigation device mounted on a vehicle, comprising: (a) when the vehicle reaches a first predetermined distance before an intersection,
First remaining distance display means for displaying the distance from the vehicle to the intersection on a part of the screen and displaying an arrow indicating a route; and (b) a second predetermined distance before the intersection as the vehicle further advances. reaches the distance, instead of the display of the distance described above, it comprises a second remaining distance display means vehicle the length of the arrow which divides erasure indicator progressed indicating the route, and in (c) above (b) The color of the arrow indicating the route is
A color different from the color of the arrow indicating the route in the description (a)
A navigation device for a vehicle, characterized by being changed to a vehicle navigation system. 2. An information storage means for storing map information; a current position detection means for detecting a current position; an input means for inputting a destination, a search condition, etc .; A route calculation unit for calculating a route to a destination based on information input by the input unit, a route storage unit for storing the route calculated by the route calculation unit, Route guidance means for reading out route information by the route storage means for guidance based on the current position detected by the current position detection means, and wherein the route guidance means has a current position at a distance from the intersection of the A first remaining distance display means for displaying the remaining distance to the intersection when the vehicle reaches the first predetermined distance, and an intersection when the current position reaches the second predetermined distance from the intersection. Ingredients and a second remaining distance display means for displaying in a different form the remaining distance to the point with the first remaining distance display means
And the form of the remaining distance display of the second remaining distance display means is
Change the color of the arrow to the arrow of the first remaining distance display means
Vehicle navigation characterized by displaying
apparatus. 3. The vehicle navigation device according to claim 2 , wherein the first remaining distance display means performs an arrow display indicating a route and a distance display indicating a remaining distance to an intersection, and the second remaining distance. The display means deletes the distance display displayed by the first remaining distance display means, and changes the length of the arrow display indicating the route in accordance with the movement of the current position.