JPH08297034A - Map display - Google Patents

Abstract

PURPOSE: To calculate and set an actually travelable route while sufficiently taking account of roads subjected to traffic control at the time of route guidance. CONSTITUTION: The map display comprises a CD block 5 loading a CD-ROM storing a map data including road information, and a remote control unit 20 for inputting the map data stored in the CD-ROM at an arbitrary point thereof along with the traveling condition data. When a map data is read out from the CD-ROM and displayed, a CPU 9 reads out the positional data at an inputted point out along with the corresponding traveling condition data from the traveling condition data memory area in an RAM 8. The traveling condition data thus read out is displayed at a monitor block 6 while being matched with the position designated by the map data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map display device applied to, for example, a car navigation system.

[0002]

2. Description of the Related Art In recent years, GPS (Global Posi)
2. Description of the Related Art Navigation devices for automobiles, which utilize the Tioning System), have become widespread. In this type of navigation device, latitude information and longitude information of the current position are calculated based on signals from a plurality of artificial satellites received by a GPS antenna, and road information and place name information read from a recording medium such as a CD-ROM. It is displayed on the display together with map data including

In navigation devices, a route guidance function is becoming essential. This function is used to display the recommended road from the starting point (current position) to the destination on the CD-ROM.
It is calculated and set according to the calculation conditions based on the road information contained in the map data recorded in the etc., and while traveling on the recommended route, when approaching the branch point, the direction to turn etc. will be announced by voice or display. However, this will guide the user to the destination. In addition, the calculation conditions are basically based on the fact that the distance to the destination is the shortest, and in addition to this, when calculating the route, the driver prefers toll roads, national roads, use only general roads, etc. Generally, various conditions based on road information can be added.

[0004]

However, in the conventional navigation device as described above, in the calculation of the route guidance function as described above, the route is calculated so as to be the shortest by simply the positional relationship on the map. Therefore, information about traffic rules that restricts actual traveling such as one-way traffic, prohibiting right / left turn, and prohibiting entry outside the designated direction is not considered.

Therefore, there is a considerable possibility that the user will be guided to a road that cannot be actually traveled while traveling on the calculated and set recommended route. FIG. 8 exemplifies a screen displaying such a route guidance display. In the figure, on the map display screen MP, the current vehicle position mark PP is displayed according to the traveling direction of the vehicle, and the trajectory mark TR along with the trajectory of the vehicle is displayed as shown in the figure. You can easily see where you are and what direction you are going. At this time,
As shown by the thick broken line in the figure, the guide road GR is displayed so as to pass straight through the intersection JC ahead of the current position.

[0006] If the actual guideway GR is a one-way exit position where the intersection JC is one-way, the vehicle entry is prohibited,
If you drive, the vehicle will follow the route guidance at intersection J.
When the vehicle reaches C, it is necessary to immediately visually recognize the vehicle entry prohibition sign installed in the direction of the road GR and immediately decide whether to make a right turn or a left turn without making a decision to bypass this road GR. Don't

As described above, when the route is guided to a road which cannot be actually driven, not only is it troublesome for the driver to bypass the road, but it is very dangerous.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to actually drive a vehicle while sufficiently considering a road whose traveling is restricted by traffic rules when guiding a route. It is to provide a map display device capable of calculating and setting possible routes.

[0009]

Means for Solving the Problems That is, the present invention provides (1) a map data storage means in which map data including road data is stored, and an arbitrary point on the map data stored in the map data storage means. First to enter instructions
Point input means, condition input means for inputting travel condition data in accordance with the input by the first point input means, position data of the point input by the first point input means and the position data. Correspondingly, the travel condition storage means for storing the travel condition data input by the condition input means, and the position data and this position from the travel condition storage means when reading and displaying the map data from the map data storage means. The driving condition data corresponding to the data is read, and display control means for displaying the read driving condition data in accordance with the position indicated by the position data on the map data is provided. (2) In the above item (1), it is read from the second condition input means for indicating and inputting an arbitrary departure point and destination on the map data stored in the map data storage means and the traveling condition storage means. Considering the contents of the position data and the traveling condition data corresponding to this position data, the position data of the starting point and the destination point input by the second point input means and the map data stored in the map data storage means. And a route calculation means for calculating a route from the departure point to the destination point.

[0010]

With the configuration shown in the above item (1), it is possible to arbitrarily input traffic rules such as vehicle entry prohibition and right / left turn prohibition as the driving condition data, and when the map data is read and displayed, the driving is performed. Since the condition data can be displayed at the corresponding position on the map, it is possible to know the contents of restrictions at the place before reaching the place, and avoid unnecessary confusion. (2) In addition to the operation described in the above item (1), the route can be calculated in consideration of the content of the traveling condition data when calculating the route guidance, so that it is possible to actually drive the vehicle. A high induction route can be obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an automobile navigation system utilizing GPS will be described below with reference to the drawings. FIG. 1 shows a circuit configuration of the entire apparatus, which includes a GPS antenna 1 installed on the roof of a vehicle body and an L1 from the satellite received by the GPS antenna 1.
Despread LSI for C / A code in the band (1.57542 GHz band)
It has a GPS block 2 which demodulates and decodes to calculate the latitude, longitude, height, time, etc. of the present location.

The GPS block 2 is connected to a graphic block 3, and the graphic block 3 records map data consisting of a KEY block 4 mainly composed of a remote control unit 20 which will be described later in detail, road information and place name information. A CD block 5 in which a CD-ROM as a recording medium is mounted and a monitor block 6 having a display device composed of a CRT or an LCD panel are respectively connected.

The graphic block 3 is provided with a CPU 9 for controlling the entire apparatus on the basis of an operation program stored in the ROM 7 and various data stored in the RAM 8. In addition to the temporary various data used when the CPU 9 controls the operation, the RAM 8 stores the traveling condition data in a traveling condition data storage area provided by using a part of the data, which will be described in detail later. To do.

The CPU 9 controls the above G when driving on a road.
When the latitude and longitude data of the current location, that is, position data is sent from the PS block 2, the map data around the current location is called from the CD block 5 via the CPU peripheral circuit gate array (G / A) 10, and the video RAM 11 The video signal is sent to the monitor block 6 as a video signal via the connected graphic controller 12. As a result, on the display screen of the monitor block 6, a map including roads, place names, marks indicating the current position, and the like are displayed.

FIG. 2 shows an external structure of a remote control unit 20 which mainly comprises the KEY block 4.
2A is a left side view and FIG. 2B is a top view. The remote control unit 20 is a wired remote controller in which a remote control body case 21 is connected to the KEY block 4 by a cable. As shown in FIG. 2A, a power switch is turned on / off by a slide switch on the left side surface of the remote control body case 21. A power switch 22 is provided for performing.

Further, as shown in FIG. 2B, the power source LED 23, NAVI /
CD key 24, TV key 25, FM DATA key 2
6, MENU key 27, cursor key 28, ENTER
A key 29, a position (shown as "POS" in the figure) key 30, a scale change / tuning key 31, a MARK key 32, a POINT key 33, a HOME key 34 and a VI.
A DEO key 35 is provided.

The power LED 23 is the power switch 22.
Lights in red when the power is turned on by the operation. NA
The VI / CD key 24 is a CD when the navigation operation is performed by this device or the description thereof is omitted in the present embodiment.
These keys are operated when a music CD is mounted on the block 5 to listen to music.

Although not described in this embodiment, the TV key 25 is a key to be operated when a TV tuner (not shown) is connected to the graphic block 3 to watch TV on the monitor block 6, and an FM DATA key. Similarly, although not described in this embodiment, reference numeral 26 is a key to be operated when an FM multiple tuner (not shown) is connected to the graphic block 3 to display character data or the like by the FM data multiplex broadcast on the monitor block 6. .

The MENU key 27 is a key for instructing the display of various menu screens including the setting of the running condition data, and the cursor key 28 is for moving the cursor displayed on the display screen of the monitor block 6 in the up, down, left and right directions on the display screen of the monitor block 6. The ENTER key 29, which is a ring-shaped key for instructing the movement of, is a key for selecting and instructing the icon or the like pointed by the cursor on the display screen by the movement of the cursor key 28.

The position key 30 is a key for displaying the latitude, longitude, etc. of the current location indexed by the GPS antenna 1 and the GPS block 2, and the scale changing / tuning key 31 is for the map displayed during the navigation operation. This is a key for instructing up / down tuning at the time of television or radio reception operation while giving a scale change instruction.

Further, the MARK key 32 is a key for marking an arbitrary position on the map data to input and set the traveling condition data and the like, and the POINT key 33 is a key for setting a destination and operating the route guidance function. The HOME key 34, which is a key for instructing screen scrolling to the destination side, is also a key for instructing setting of the present location and screen scrolling to the present location side when the route guidance function is operating.

Although not described in this embodiment, the VIDEO key 35 is a key to be operated when a video camera (not shown) is connected to the graphic block 3 and the video is viewed on the monitor block 6.

FIG. 3 shows the structure of a running condition data storage area 8a provided in a part of the RAM 8.
As shown in the figure, the traveling condition data is stored in the traveling condition data storage area 8a as a plurality of sets, each including latitude data, longitude data, type data, direction data, and remark data.

Among these, the type data are not only those according to traffic rules such as vehicle entry prohibition, traffic closure, right turn prohibition, left turn prohibition, entry prohibition outside specified direction, etc. It is also possible to input and set temporary things such as frequent occurrences and non-passing, or things that the driver does not personally like.

The direction data represents which direction of the road the driving condition is added to, for example, in 16 directions. The remark data is a restriction condition for the type data such as applicable vehicle type and time zone. It is for setting.

Next, the operation when the route guidance function is executed during the navigation operation according to the above embodiment will be described. 4 and 5 mainly use the CPU 9 to execute the GPS
It shows a series of control processing contents from the reception of the latitude / longitude data of the current position from the block 2 to the route guidance corresponding to the traveling condition data.

First, the latitude / longitude data of the current position is received from the GPS block 2 via the CPU peripheral circuit G / A10 based on the radio wave received by the GPS antenna 1 at the beginning of the process (step S1), and the predetermined position of the RAM 8 is received. Then, the display area for developing the map is calculated from the received latitude and longitude data with a preset value (step S2).

Then, based on the calculated latitude and longitude range indicating the display area, it is judged whether or not there is a change from the display area that has been displayed until then (step S3), and only when there is a change, the latitude of the calculated display area is determined. CD depending on the longitude range
The block 5 is accessed, all road data and place name data in the corresponding display area are read out from the map data of the CD-ROM mounted on the CD block 5, and the video R is read.
The image is developed on the AM 11 and a part of the area is displayed and output on the monitor block 6 (step S4).

After that, for example, M of the remote control unit 20
It is judged whether or not the mode for setting the traveling condition data and writing and displaying the corresponding condition mark on the map is selected by operating the ENU key 27, the cursor key 28 and the ENTER key 29 (step S5).

When the mode is not selected, the processing from step S1 is repeated again. When the mode is selected, the condition mark representing various traveling conditions prepared in advance is next displayed on the display screen. Display the list in the window and select the condition mark you want to write on the map.

Here, for example, the cursor key 28 and EN
When any one of the condition marks displayed by the operation of the TER key 29 is selected (step S
6) After erasing the window and returning to the map display screen, the necessary direction is then selected according to the place where the selected condition mark is to be written and the type of the mark (step S7).

This is because after displaying the cursor on the display screen, the display area of the map is sequentially scrolled from the current position according to the operation of the cursor key 28, and the cursor is moved to the position on the map where the condition mark is to be written. On ente
This is executed by operating the R key 29, and when the direction is also input if necessary, the input is performed according to the type of the mark.

For example, in the case of writing a condition mark that prohibits vehicle entry, the exit position of the one-way road is 1
It is not necessary to select the direction only by specifying the point, but if you write a condition mark that prohibits right turn or left turn, you must decide which direction you should enter at the intersection and whether right turn or left turn is prohibited. When writing a condition mark for a road, the necessity and method of direction selection differ depending on the selected condition mark, such as where the one-way entrance and exit positions of the road are.

After that, for example, "except for large size and large size", "8"
If there is a limiting condition such as the applicable vehicle type or time zone such as "-20", this is input as remark data (step S8).

Since the input of each data constituting the driving condition data has been completed, the above-mentioned step S
The RA of the dot pattern of the condition mark selected in 6
The map data on M11 is overwritten on the position corresponding to the place selected in step S7 and displayed on the monitor block 6, and each data constituting the input running condition data is stored in the running condition data storage area of the RAM 8. 8a
The stored data is displayed in the display window using a part of the map data displayed on the monitor block 6 for confirmation (step S).
9).

FIG. 6 exemplifies the map data displayed on the monitor block 6 in step S9. In the figure, on the map display screen MP, the current vehicle position mark PP and the trajectory mark TR along with the trajectory of the vehicle are displayed according to the traveling direction of the vehicle.
Corresponding to the input from 5 to S8 from the current position to the intersection JC
Condition mark CM forbidden to enter the vehicle after passing straight
Is displayed.

Therefore, by looking at the navigation screen display, it is possible for the driver who is driving to easily see before the intersection JC that entry will be prohibited after passing the intersection JC straight from the current position. Therefore, it is possible to decide in advance whether to make a right turn or a left turn without observing the vehicle entry prohibition sign actually, and to facilitate that in advance.

After the processing in step S9, the CPU 9
Indicates whether or not the route calculation for route guidance is performed, and the MENU key 27 and the cursor key 2 of the remote control unit 20 are displayed.
It is judged whether or not the "route guidance" menu has been selected by the operation 8 and has been confirmed by the operation of the ENTER key 29 (step S10).

If it is determined that the route calculation is not performed without the predetermined key operation being performed, the process from step S1 is repeated again. However, if it is determined that the route calculation is performed, the map is next calculated. Is displayed on the display screen of the monitor block 6, the input of the destination is declared by operating the POINT key 33 to display the cursor, and then the cursor key 28 is operated to scroll the screen to move the cursor to an arbitrary point. Move and enter
By operating the key 29, the destination is selected and input (step S11).

This is because the latitude / longitude data of the current value received from the GPS block 2 in step S1 and stored in a predetermined position of the RAM 8 is used as position information of the starting point of the route to simplify the input operation, and only the destination is When the latitude / longitude data of the selected and input destination is also stored in a predetermined position of the RAM 8, the CPU 9 starts the route calculation (step S12).

At this time, when a plurality of destinations are set by selecting and inputting the destinations using the POINT key 33, the last selected destination is the final destination, and the other destinations are from the departure place to the destination. It will be set as a waypoint to reach, and when multiple waypoints are selected,
The order through which it passes shall correspond to the order selected.

The CPU 9 starts the calculation by the road information in the map data in order to calculate the guide route from the starting point (current position) to the destination according to the program stored in the ROM 7. At this time, for example, the map A range within a certain distance from a rectangle having the above-mentioned starting point and destination as diagonals is set as a range for obtaining a route, and the running condition data corresponding to the range is stored in the running condition data storage area of the RAM 8. 8a, that is, whether the condition mark CM as shown in FIG. 7 is present in the range is judged from the latitude / longitude data (step S1).
3).

If it is determined here that the corresponding condition mark CM does not exist, the CPU 9 executes the normal route calculation as it is (step S15). However, if it is determined that the condition mark CM exists, the CPU 9 does so. The traveling condition data to be executed is read from the traveling condition data storage area 8a of the RAM 8, and the route calculation is executed in consideration of the content of limiting traveling (step S14).

After the route calculation is completed, the monitor block 6 displays the calculated route on the map including the current position (step S16), and then the route guidance is started (step S17). The processing from step S1 is repeatedly executed.

FIG. 7 exemplifies the display screen of the monitor block 6 at the time when such route guidance display is started. In the figure, on the map display screen MP, a current vehicle position mark PP and a trajectory mark TR along with the trajectory of the vehicle are displayed as shown according to the traveling direction of the vehicle, and are shown by thick broken lines in the figure. As described above, the guide road GR is displayed by turning right at the intersection JC ahead of the current position.

In this case, even if the route that goes straight from the position of the vehicle position mark PP to the intersection JC is the shortest route as shown in FIG. As you can see, the condition mark CM is forbidden to enter the vehicle.
Is displayed and cannot be actually used as a route, it is excluded from the route by route calculation in consideration of the input contents of the traveling condition data.

In the above-mentioned embodiment, as the means for acquiring the current position, only the absolute position by GPS using the artificial satellite is used, but the present invention is not limited to this.
The relative position is calculated by calculating the moving direction and its distance using a vehicle speed sensor that detects the running speed of the vehicle from the number of rotations of the tire and a piezoelectric vibration gyro, and GPS is used by obstacles such as tunnels and buildings. It is possible to use a means called autonomous navigation that estimates the current position even after the positioning becomes impossible.

In addition, a method called map matching, in which the position on the map is determined by determining the road that has passed by comparing the running locus obtained by this autonomous navigation with the road shape on the map, is incorporated. As a result, when the current position is displayed, the display content can be accurately displayed according to the road position.

[0049]

As described in detail above, according to the present invention, traffic rules such as prohibition of vehicle entry and prohibition of right / left turn can be arbitrarily input as driving condition data, and when the map data is read out and displayed, the driving is performed. Since the condition data can be displayed at the corresponding position on the map, it is possible to know the contents of restrictions at that place before reaching that place, and it is possible not only to avoid unnecessary confusion for those who drive, but also to the route. Since the route can be calculated in consideration of the content of the driving condition data when the guidance is calculated, it is possible to provide a map display device capable of obtaining a highly realistic guidance route that can be actually driven. it can.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall circuit configuration according to an embodiment of the present invention.

FIG. 2 is a diagram showing an external configuration of a remote control unit included in the KEY block of FIG.

3 is a diagram exemplifying a configuration of a traveling condition data storage area provided in the RAM of FIG.

FIG. 4 is a flowchart showing the processing contents of the operation according to the embodiment.

FIG. 5 is a flowchart showing the processing contents of the operation according to the embodiment.

FIG. 6 is a diagram exemplifying a map display screen during operation according to the embodiment.

FIG. 7 is a diagram exemplifying a map display screen during operation according to the embodiment.

FIG. 8 is a diagram showing an example of a general map display screen.

[Explanation of symbols]

 1 ... Antenna 2 ... GPS block 3 ... Graphic block 4 ... KEY block 5 ... CD block 6 ... Monitor block 7 ... ROM 8 ... RAM 8a ... Running condition data storage area 9 ... CPU 10 ... CPU peripheral circuit gate array (G / A) ) 11 ... Video RAM 12 ... Graphic controller 20 ... Remote control unit 27 ... MENU key 28 ... Cursor key 29 ... ENTER key 32 ... MARK key 33 ... POINT key

Claims (2)

[Claims] 1. A map data storage means for storing map data including road data, and a first spot input means for indicating and inputting an arbitrary spot on the map data stored in this map data storage means, Condition input means for inputting travel condition data in accordance with the input by the first point input means, position data of the point input by the first point input means, and the condition input means corresponding to the position data Driving condition storage means for storing the driving condition data input by the above, and position data from the driving condition storage means and driving condition data corresponding to the position data when the map data is read from the map data storing means and displayed. And a display control means for displaying the read traveling condition data in accordance with the position indicated by the position data on the map data. Map display device to be. 2. A second point input means for indicating and inputting an arbitrary starting point and destination point on the map data stored in the map data storage means, position data read from the traveling condition storage means, and this position. In consideration of the contents of the traveling condition data corresponding to the data, the departure point is determined by the position data of the departure point and the destination point input by the second point input means and the map data stored in the map data storage means. The map display device according to claim 1, further comprising a route calculation means for calculating a route from the point to the destination.