JPH0833972B2 - Vehicle navigation system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle navigation device that displays a traveling locus of a vehicle on a screen of a display device and guides the vehicle to a destination.

[Conventional technology]

Recently, a vehicle navigation device that superimposes the current position of a vehicle such as an automobile on the map information stored in advance in the storage means and displays it on the screen of the display device to guide the vehicle to the destination has been actively researched and developed. , Some have been commercialized.

In such a vehicle navigation device, not only the current position of the vehicle is displayed on the map, but also the traveling locus is also displayed, so that the route that the vehicle has passed can be known and more accurate guidance can be performed. The conventional vehicle navigation device displays the traveling locus of the vehicle by communicating (connecting) the current position of the vehicle actually detected.

[Problems to be solved by the invention]

However, in the conventional vehicle navigation device, since the running locus is displayed by communicating the actually detected current position, the detection error of the current position appears as the running locus and the running locus runs. It has a drawback that it is displayed outside the road or is displayed meandering on the road. In order to eliminate such protrusions and meanders, it is necessary to improve the accuracy of position detection, which not only increases the size of the device but also increases the cost. Further, in order to correct the protrusions and meanders and display them on the screen, there is a drawback that arithmetic processing in a microcomputer or the like and a program therefor become complicated.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a vehicle navigation device that displays a traveling locus of a vehicle on a screen of a display device. The vehicle navigation device includes detailed map information and does not include the traveling locus of the vehicle. Of the roads displayed on the screen based on the road information included in the first map information and the first storage means for storing the map information, at least all the roads on which the vehicle can run are Second storage means for storing second map information having ideal traveling locus information obtained when ideally traveling on a road, current position recognition means for recognizing the current position of the vehicle, and the recognized vehicle The predetermined map including the current position of the first map information and the second map information are sequentially combined, or the first map information is sequentially replaced by the second map information. Display control means for displaying the location,
It is configured with.

[Action]

According to the present invention, the first storage means stores the first map information that includes detailed map information and does not include the traveling locus of the vehicle.

In parallel with this, the second storage means, on the actual roads corresponding to at least all the roads on which the vehicle can travel among the roads displayed on the screen based on the road information included in the first map information. The second map information having the ideal traveling locus information obtained when the vehicle travels ideally is stored.

Then, the current position recognition means recognizes the current position of the vehicle.

Thereby, the display control means sequentially synthesizes the first map information and the second map information with respect to the predetermined area including the recognized current position of the vehicle, or sequentially replaces the first map information with the second map information. To display on the display device.

As a result, the ideal traveling locus is displayed on the screen of the display device so as to correspond to the actual traveling locus, so that the screen can be displayed without protruding or meandering from the road as in the case of displaying the actual traveling locus. It is possible to display the traveling locus on.

In addition, since all roads on which the vehicle can travel have ideal travel path information corresponding to the roads, even if the planned travel route and the actual travel route are different, the actual travel route is supported. It is possible to display the ideal travel route to be performed. Therefore, the ideal travel route corresponding to the actual travel route can be displayed regardless of the planned travel route.

Furthermore, since the actual traveling locus based on the recognized current position of the vehicle is not displayed on the screen, it is not necessary to improve the current position recognition accuracy in order to increase the display accuracy, and the highly accurate current position recognition means is not required. . Therefore, a small and inexpensive vehicle navigation device can be provided.

Furthermore, without updating all the map information displayed on the display device every time the current position is updated, only the predetermined area including the current position of the vehicle recognized by the current position recognizing means is included in the first map. Since the ideal travel path can be displayed by simply synthesizing the information and the second map information, or by sequentially replacing the first map information with the second map information, the update processing of the map information displayed on the screen is reduced. The Rukoto. Therefore, the processing speed of the vehicle navigation device is increased.

〔Example〕

Next, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a vehicle navigation device of the present invention. In the figure, reference numeral 1 is an image file as a storage means for storing map information, which can be constituted by, for example, a CD-ROM, a video disk or the like. The image file 1 stores normal map information that does not include a travel locus and map information that includes a travel locus in the same area (a travel locus is written in advance). Reference numeral 2 is a reading device for reading the information stored in the image file 1, decoding the information, and outputting the decoded information to the arithmetic unit 3 including a microcomputer. Reference numeral 4 is an arithmetic memory including a program for controlling the operation of the arithmetic device and a RAM for storing other necessary information. Denoted at 5 are sensors for detecting data necessary for recognizing the current position such as traveling speed, distance and direction of the vehicle. The detection signal is supplied to the position recognizing device 6 so that the current position can be recognized. Has become. Information regarding the recognized current position is output to the arithmetic unit 3. Reference numerals 7 and 8 denote image memories. The former stores information that does not include the traveling locus in the map information read from the image file 1, and the latter stores information that includes the traveling locus. 9 is
It is an image memory that stores information about an image displayed on a display device 10 such as a CRT or LCD.

Then, the operation will be described. The navigation by this apparatus is executed by the arithmetic unit 3 according to the flowchart shown in FIG. 2, for example. That is, when the vehicle is traveling toward a predetermined destination, the sensors 5 detect the data such as the traveling speed, distance and direction of the vehicle necessary for recognizing the current position by a known method. The detected data is supplied to the position recognition device 6 and the current position is recognized. The arithmetic unit 3 determines whether or not the current position recognized by the position recognition unit 6 is within the range of the map displayed on the display unit 10 until then. When the current position is out of the range of the map displayed on the display device 10, the computing device 3 retrieves the map information including the current position from the image file 1 via the reading device 2 and reads it. Then, the normal map information as shown in FIG. 3A not including the traveling locus is stored in the image memory 7,
Further, the map information as shown in FIG. 3B including the traveling locus is transferred to and stored in the image memory 8. The map information stored in the image memory 7 is further stored in the image memory 9 and displayed on the display device 10. This causes a normal map to be displayed.

The arithmetic unit 3 also stores the data from the image memory 7 in the image memory 9 in a portion having a constant area (marked with diagonal lines in FIG. 4) including a mark indicating the previous current position.
The data in the corresponding portion of the image memory 8 is replaced. Therefore, on the display device 10, a part of the road on which the traveling locus is not displayed is displayed in place of the road on which the traveling locus is displayed (FIG. 4).

The arithmetic unit 3 further stores the current position mark as shown in FIG. 3C in the image memory 9 in correspondence with the position recognized by the position recognition unit 6. As a result, a part of the map information that does not include the traveling locus shown in FIG. 3A is replaced with the map information that includes the traveling locus shown in FIG. 3B, and the current position mark as shown in FIG. 3C is displayed on the screen. Are combined to form a screen on which the traveling locus and the current position are displayed as shown in FIG. 3D.

Sensors 5 that the vehicle has moved a predetermined unit distance
The same screen is displayed until is detected, and when the movement of a predetermined unit distance is detected, the above operation is newly repeated. As a result, the previous present location mark is erased, and that portion is replaced with the map information including the traveling locus, and a new present location mark is displayed.

In addition, the map information including the traveling locus omits the display of roads,
Map information of only the line located in the center of the road,
The roads may be displayed in different colors. Further, the current position mark may be displayed simply as the end of the traveling locus. Furthermore, the present invention can be applied to a case where a traveling locus which is to be traveled is displayed instead of the traveling locus actually traveled.

〔effect〕

As described above, according to the present invention, the ideal traveling locus is displayed on the screen of the display device so as to correspond to the actual traveling locus. It is possible to display the traveling locus on the screen without protruding or meandering.

In addition, since all roads on which the vehicle can travel have ideal travel path information corresponding to the roads, even if the planned travel route and the actual travel route are different, the actual travel route is supported. It is possible to display the ideal travel route to be performed. Therefore, the ideal travel route corresponding to the actual travel route can be displayed regardless of the planned travel route.

Furthermore, since the actual traveling locus based on the recognized current position of the vehicle is not displayed on the screen, it is not necessary to improve the current position recognition accuracy in order to increase the display accuracy, and the highly accurate current position recognition means is not required. . Therefore, a small and inexpensive vehicle navigation device can be provided.

Furthermore, without updating all the map information displayed on the display device every time the current position is updated, only the predetermined area including the current position of the vehicle recognized by the current position recognizing means is included in the first map. Since the ideal travel path can be displayed by simply synthesizing the information and the second map information, or by sequentially replacing the first map information with the second map information, the update processing of the map information displayed on the screen is reduced. The Rukoto. Therefore, the processing speed of the vehicle navigation device is increased.

[Brief description of drawings]

FIG. 1 is a block diagram of a vehicle navigation device of the present invention, FIG. 2 is a flowchart thereof, FIG. 3 is a schematic explanatory diagram of map information thereof, and FIG. 4 is an enlarged schematic explanatory diagram of map information thereof. . 1 ... Image file, 2 ... Readout device 3 ... Computing device, 4 ... Computing memory 5 ... Sensors, 6 ... Position recognition device 7, 8, 9 ... Image memory 10 ... Display device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Tadashi Masaji, 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture (56) References JP-A-58-115600 (JP, A) JP-A-57- 152100 (JP, A) JP 56-74798 (JP, A)

Claims (1)

[Claims] 1. A vehicle navigation device for displaying a traveling locus of a vehicle on a screen of a display device, the first storage storing first map information including detailed map information and not including the traveling locus of the vehicle. Means, and among the roads displayed on the screen based on the road information included in the first map information, at least ideally traveled on actual roads corresponding to all roads on which the vehicle can travel. Second storage means for storing second map information having ideal travel locus information obtained in the case, current position recognition means for recognizing the current position of the vehicle, and a predetermined area including the recognized current position of the vehicle , A display control hand for displaying on the display device by sequentially synthesizing the first map information and the second map information, or by sequentially replacing the first map information with the second map information. A vehicle navigation device comprising: a step.