JPH04336592A - Navigation device for mobile body - Google Patents

Abstract

PURPOSE:To provide a navigation device for a mobile body having the capability of confirming the present position of the mobile body on a display screen more accurately. CONSTITUTION:Data between a departure place and a destination entered from an input operation section 5 is searched by a route search section 102, a recommended route 50 is displayed and information data having nothing to do with the recommended route is deleted from the screen of a display 4. Also, data 59 is additionally displayed, according to more detailed data 51 stored in a map data memory section 3 and related to the recommended route 50. On the other hand, the present place of a mobile body is calculated and assessed by a mobile body position detection section 101, according to signals from a distance sensor 61 and a bearing sensor 62, and map data, and more detailed data 54 and 55 of a place surrounding the present position of the mobile body is additionally displayed. Consequently, the present place of the mobile body can be easily confirmed on a screen display, and safe drive without any anxiety and easy arrival at a destination are ensured.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation system for a mobile body that displays a recommended route between the current location of the mobile body and a destination, or between a departure point and a destination on a map.

0002

2. Description of the Related Art FIG. 15 shows a configuration example of a conventional navigation device disclosed in, for example, Japanese Unexamined Patent Publication No. 2-28800. , RAM1
3 and input/output interface (I/O) 14 are connected to bus 15.
connected with. 2a is a traffic information receiver as an example of an information receiver, which receives traffic information such as congestion, construction, regulations, etc. from a traffic information center using a quasi-microwave system, guided radio system, FM multiplex system, etc. .

[0003] 3a is a compact disc player, which is a read-only external storage device that stores road maps, and CD-ROM is currently the mainstream because of its large storage capacity and fast read speed. . 4 is a display device that processes the map data of the compact disc player 3a or the traffic information received by the traffic information receiver 2a using the processing device 1a, converts it into an image signal, and displays it;
For example, it is a CRT or LCD. Reference numeral 5 denotes an operation input section such as a key switch or a touch switch for operation by a driver or the like.

Reference numeral 6 denotes a self-navigating type position sensor, which is composed of a direction sensor and a distance sensor.These sensor signals are processed by a processing device 1a to specify the current location of the moving object.

Next, the operation will be explained with reference to the flowchart shown in FIG. In step S1, the starting point, destination point designation, route selection conditions, etc. are input, and map information according to the input data is read out from the compact disc player 3a and displayed on the display 4. If route selection conditions (for example, shortest distance, shortest time, etc.) are selected here, a candidate route is searched for by the processing device 1a.

[0006] In step S2, it is determined whether a candidate route has already been input. If no candidate route has been input, the process advances to step S3, and a candidate route is input from the operation input section 5. Step S4 is a step for searching the candidate route input in step S3 by adding limiting conditions (search within a certain distance from the candidate route, etc.) for searching other routes. The most recommended route is selected from the routes searched in step S4 based on the traffic information input from the traffic information receiver 2a and route selection conditions, and the selected route is shown at 30 in FIG. 17(a). It is displayed on the display 4 as shown.

[0007] In step S7, it is determined whether the moving object has reached the destination, and once the moving object has reached the destination, the process ends. If the destination has not been reached, the process returns to step S1 and repeats the above routine, but at this time, since the candidate route has already been input in step S2, the process proceeds to step S8.

[0008] If there is a change in traffic information or there are no route selection conditions, the process returns to step S1, but if there is a change in the conditions, the process proceeds to step S5, a re-search is performed, and the change is displayed again in step S6. . An example of this display is shown in Figure 17.
Shown in (b). In this figure, as a result of receiving traffic jam information by the traffic information receiver 2a, a traffic jam is displayed and
The recommended route has been changed, and it is now indicated that there were accidents at 42 additional points. As a result, the current position 41 of the moving body
The recommended route from to the destination is re-searched and displayed as 40.

[0009]

[Problems to be Solved by the Invention] Conventional navigation devices for mobile bodies are configured as described above, and search for a recommended route (recommended route) between the current location and the destination, display a color change, etc., or detect an accident. It only displays information, and the display mounted on the vehicle has limited space, so the display area is small and the amount of information is limited. For example, the currently mainly used 6-inch display screen has visibility problems and can only display about 15 character strings, so the amount of information on recommended routes is small. In areas with unfamiliar geography, there is a problem in that information on the current location of moving objects, intersections, and targets along roads cannot be recognized.

[0010] This invention was made in order to solve the above-mentioned problems, and it makes it easy to confirm information about recommended routes, further increases the amount of detailed information about recommended routes, and makes it easy to confirm the current location of a moving object. The purpose of the present invention is to obtain a navigation device for a mobile object that can be used to accurately and safely confirm a recommended route and travel.

Furthermore, it is an object of the present invention to provide a navigation device for a mobile body that can easily recognize the current location of a mobile body even in an unfamiliar geographical area by additionally displaying detailed information data as the mobile body moves.

0012

[Means for Solving the Problems] A mobile navigation device according to the present invention displays the recommended route when a recommended route to a destination is determined, and also displays information data regarding the recommended route on a display. However, restrictions are placed on the display of information data other than the recommended route.

[0013] As another means related to the present invention, detailed information regarding the recommended route is additionally displayed.

[0014] When a recommended route to a destination is determined, the mobile navigation device according to the present invention displays the recommended route and also displays information data related to the recommended route on the display, and displays other routes other than the recommended route. In addition to adding restrictions to the display of information data, detailed information regarding the recommended route is additionally displayed.

Another means according to the present invention is such that as the moving object moves, information data near the current location of the moving object is newly displayed on the display.

[0016]

[Operation] When a recommended route to a destination is determined, the mobile navigation device according to the present invention displays part of the data displayed regardless of the recommended route, such as part or all of text and symbol data. The information on the recommended route is deleted and the information about the recommended route remains displayed to make it easier to see, allowing the driver to easily recognize the current location of the moving object, drive safely following the recommended route, and reliably reach the destination.

[0017] Furthermore, detailed information data regarding the recommended route is newly displayed on the display to increase travel guidance information for the recommended route, allowing the driver to easily recognize the current location of the moving object and to select the recommended route. You can drive safely according to the route and reach your destination without fail.

Another function of the means is to newly display detailed information on the vicinity of the current location of the moving object on the display as the moving object moves, to provide driving guidance, and to help the driver move. You can easily recognize your current location and drive safely and with peace of mind.

[0019]

[Embodiments] Each embodiment of the present invention will be described below. First, a first embodiment of the present invention will be described. In FIG. 1, reference numeral 1 denotes a control unit consisting of a mobile object position detection section 101, a route search section 102, and a display control section 103, and is an information receiver for receiving external information, such as a traffic information receiver. 2. A map data storage unit 3, such as a compact disc player, which stores road data and information data; a map and information data read from the map data storage unit 3; and a mobile object position detection unit 10.
1, the recommended route searched by the route search unit 102, or external information received from the information receiver 2 via the display control unit 103, such as a CRT or LCD. a display device 4, an operation input section 5 such as a key input section for operation by the driver or user, a distance sensor 61 for calculating the current location of the moving body,
A direction sensor 62 and a position information receiver 63 are connected.

The current location of the moving body is evaluated by the moving body position detection unit 101, and the approximate position is estimated based on data from a distance sensor 61 such as a vehicle speed pulse or a wheel speed pulse, an azimuth sensor 62 such as a geomagnetic sensor, or a gyro. In order to cancel the accumulation of each sensor error, the map data storage unit 3
By using map matching technology, which evaluates the current location by referring to the road data stored in the map, accuracy can be further improved. Furthermore, for example, beacon, G
PS (Global Positioning System)
If absolute position coordinate data is obtained using a method such as tem), even higher accuracy can be obtained, but the system price will be higher.

When going to a specific destination, the destination is selected and set using the operation input section 5. The destination can be set by displaying the map data in the map data storage unit 3 on the display 4 and specifying a point on the map using the operation input unit 5, or by displaying information data as a list on the display 4. , are selected and set using the operation input section 5. When setting a specific point as the starting point, the starting point can be set in the same way.

[0022] Once the departure point and destination are set and the search conditions are set using the operation input unit 5, the data in the map data storage unit 3 is read, and the route search unit 102 calculates and displays a route according to the conditions. Display on container 4. The search conditions are generally, for example, the shortest distance, the shortest time, etc., but may also be conditions based on information such as tourist spots, gourmet food, etc.

After the recommended route has been searched, the display 4 displays a recommended route that can be distinguished from other roads by, for example, changing the color of the road or thickening the line width, and displays data related to the recommended route. , information data that meets the search conditions is displayed on the display 4.

The operation of setting a specific departure point and displaying the recommended route and information to the destination will be explained with reference to the flowchart of FIG. In step S101, a departure point is set using the operation input section 5. In step S102, it is determined whether or not to set a destination. If the destination is not set, the process ends with the departure point displayed or the current location of the moving body displayed.

The effect of the first embodiment of the present invention is when a destination is input, and the destination is input from the operation input section 5 in step S103. In step S104, it is determined whether or not to search for a route to the destination. If route search is not to be performed, the process ends immediately. When performing a route search, search conditions are set using the operation input unit 5 in step S105. Of course, it is also possible to incorporate specific search conditions into the program to save the trouble of inputting them.

In step S106, data is read from the map data storage unit 3 between the set departure point and destination according to the set search conditions, and the route search unit 102 searches for a route. The route search may be performed by searching for a plurality of recommended routes, and depending on the search time, it may be set on the program or in step S105. If the search ends in step S107, step S108
The best recommended route is displayed on the display 4. In this case, the recommended route is displayed using different colors or thicker line segments to make it easier to distinguish it from other roads.

In step S109, information data unrelated to the recommended route displayed above is deleted. In this case, whether or not to erase all the information data that has been displayed so far can be determined based on the map data and the program. For example, it is sufficient to leave behind objects that can be used as a guide for moving objects even from a considerable distance, such as Mt. Fuji, Tokyo Tower, and airports.

Examples of the screens of the display device 4 are shown in FIGS. 3 to 5. FIG. 3 shows the screen after step S103 where the departure point and destination are set on the map. Here, the departure point and destination do not necessarily need to be displayed on the screen at the same time,
It may not be necessary to display the map in this step. FIG. 4 shows step S10 in which the recommended route 50 after FIG. 3 is displayed.
This is an example of the screen after 8. FIG. 5 is an example of a screen after step S109 in which display of information data that is not very relevant to the recommended route is restricted. If emergency information such as a traffic accident is obtained from the information receiver 2, it can be displayed on the screen, and if there is a traffic accident on the recommended route, a second recommended route is displayed and the same procedure as above is performed. Just do something. Needless to say, the current location of a moving object can be displayed at the same time.

Next, a second embodiment of the present invention will be described. In the first embodiment, out of the previously displayed information data, the (thin) information data unrelated to the recommended route was deleted, but as shown in the flowchart of FIG. 6, the steps in the flowchart of FIG. Step S110 is added instead of S109, and more detailed information data related to the recommended route stored in the map data storage section 3 is additionally displayed on the display 4. FIG. 7 is an example in which detailed information data regarding the recommended route is added, and in the figure, 51 to 58 are displays of new detailed information data regarding the recommended route.

Next, a third embodiment of the present invention will be described. FIG. 8 is a combination of the flowcharts of FIG. 2 and FIG.
09), detailed information data related to the recommended route is displayed (step S110). FIG. 9 is a screen example of this embodiment, which is a composite of FIGS. 5 and 7.

Next, a fourth embodiment of the present invention will be described. In this fourth embodiment, as in the above-described embodiment, it is also possible to impose restrictions on road display in order to improve visibility, depending on the road type of the recommended route. As an example of the road type, a case where the recommended route includes an expressway will be described with reference to the flowchart of FIG. 10. After the recommended route is determined, the road type of the recommended route is read in step S201. In step S202, it is determined whether or not there is an expressway in the recommended route, and if there is no expressway, the process ends. If an expressway is selected as the recommended route, general roads are deleted in step S203. In the above example, the road type of the recommended route was set as an expressway as a condition for restricting the road display, but it may also include major roads such as national highways or prefectural roads. FIG. 11 shows a display example of this embodiment when the road type is set to national highway or expressway.

Next, a fifth embodiment of the present invention will be described. In this fifth embodiment, step S204 is further added after step S203 in FIG. 10 as shown in the flowchart in FIG. 12, and the detailed information data 51 to 58 related to the recommended route shown in FIG. S
It may be additionally displayed in step 204.

Next, a sixth embodiment of the present invention will be described. As this sixth embodiment, a case will be described in which information regarding the current location of a moving object is additionally displayed. The evaluation of the current location is as described in the first embodiment, and the distance sensor 61 and direction sensor 62 in FIG.
The current location of the mobile object is determined by taking into consideration the data in the map data storage section 3. The position information receiver 63 may be required due to accuracy issues, and the data of the information receiver 2 may include position information. Therefore, although the system may not include the position information receiver 63 and the information receiver 2, the system shown in FIG. 1 will be described with reference to the flowchart of FIG. 13.

In FIG. 13, the current location of the moving body is displayed on the display 4 on the map in steps S301 and S302. As mentioned above, since the screen size of the display device 4 is limited, it is not possible to display all information data. Therefore, in step S303, it is determined whether there is detailed information data near the current location of the mobile object. If there is detailed information data that is not displayed, additional information is displayed on the display 4 in step S304. Furthermore, according to the movement of the mobile object, it travels a predetermined distance (
Detailed information data separated by more than Xm) is processed in step S305.
to erase it from the screen of the display unit 4. Detailed information data includes geographical data such as intersection names, place names, and town names, as well as landmarks such as gas stations along the road.
Displaying everything may actually make it difficult to see, so consideration must be given to the display priority and the display position of information data.

Note that this effect is effective even in a system without the route search section 102 shown in FIG. A display screen of this embodiment is shown in FIG. In the figure, the current location of the moving object is indicated by a circled arrow, and 54 and 55 are detailed data near the current location of the moving object. Further, the name of the intersection at which the moving object passes may be displayed on the display 4, for example, at position 59 at the bottom of the screen.

Next, other embodiments of the present invention will be described. In the above example, as shown in FIG. 1, signals from the distance sensor 61 and the direction sensor 62 are taken into the moving body position detection unit 101, but it can also be applied to a case where only a position information receiver 63 such as a GPS is used. Of course, it goes without saying.

[0037]

[Effects of the Invention] As described above, according to the present invention, since the display of information data other than the recommended route is restricted, the information data regarding the recommended route can be easily recognized, and the recommended route can be taken even in geographically unfamiliar areas. You can drive safely and reach your destination without fail.

Furthermore, since detailed information data is added along with the recommended route, the driver can easily recognize the position of his/her own vehicle.
You can definitely reach your destination without deviating from the recommended route.

Furthermore, since detailed data in the vicinity of the current location of the moving object is additionally displayed, the driving vehicle can easily recognize the current location of the moving object, and can drive safely with peace of mind.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a mobile navigation device according to the present invention.

FIG. 2 is a flowchart showing the operation of the mobile navigation device according to the first embodiment of the present invention.

FIG. 3 is a diagram showing an example of a display screen when a departure point and a destination are set, for explaining the operation of the first embodiment of the present invention.

FIG. 4 is a diagram for explaining the operation of the first embodiment of the present invention.
It is a figure of the example of a display screen of a recommended route.

FIG. 5 is a diagram of an example of a display screen in which information data unrelated to the recommended route has been deleted, for explaining the effects of the operation of the first embodiment of the present invention.

FIG. 6 is a flowchart showing the operation according to the second embodiment of the present invention.

FIG. 7 is a diagram of an example of a display screen to which detailed data related to a recommended route has been added, for explaining the effects of the operation of the second embodiment of the present invention.

FIG. 8 is a flowchart showing the operation according to the third embodiment of the present invention.

FIG. 9 is a diagram illustrating the effects of the operation of the third embodiment of the present invention, in which information data unrelated to the recommended route is deleted;
FIG. 3 is a diagram of an example of a display screen to which detailed data related to a recommended route has been added.

FIG. 10 is a flowchart showing the operation according to the fourth embodiment of the present invention.

FIG. 11 is a diagram illustrating an example of a display screen in which the road type of the recommended route is determined and unnecessary road data is deleted, explaining the effect of the operation of the fourth embodiment of the present invention.

FIG. 12 is a flowchart showing the operation according to the fifth embodiment of the present invention.

FIG. 13 is a flowchart showing the operation according to the sixth embodiment of the present invention.

FIG. 14 is an example of a display screen for explaining the effects of the operation of the sixth embodiment of the present invention, and is a diagram additionally displaying detailed data around the current location of the mobile object.

FIG. 15 is a block diagram showing an example of a conventional navigation device for a mobile body.

FIG. 16 is a flowchart showing the operation of a conventional mobile navigation device.

FIG. 17 is a diagram of an example of a display screen of a conventional navigation device for a moving body.

[Explanation of symbols]

3 Map data storage unit 4 Display unit 5 Operation input section 50 Recommended route 51-59 Detailed information data 61 Distance sensor 62 Direction sensor 63 Location information receiver 101 Mobile object position detection unit 102 Route search section

Claims (4)

[Claims] 1. A map data storage section that stores map data, a moving object position detection section that detects the current location of the moving object, a display that displays the map data and the current location of the moving object, etc., the current location of the moving object, and the destination. an operation input section for setting etc.;
In a mobile navigation device equipped with a route search unit that calculates a recommended route to a destination, when the recommended route to the destination is determined, the map that was displayed before setting the destination is A navigation device for a mobile body, characterized in that a recommended route is displayed, and display of information data other than the recommended route is restricted. 2. A map data storage unit that stores map data, a mobile unit position detection unit that detects the current location of the mobile unit, a display that displays the map data and the current location of the mobile unit, and the current location and destination of the mobile unit. an operation input section for setting etc.;
In a mobile navigation device equipped with a route search unit that calculates a recommended route to a destination, when the recommended route to the destination is determined, the map that was displayed before setting the destination is A navigation device for a mobile object, characterized in that detailed information data regarding a recommended route is added and displayed. 3. A map data storage section that stores map data, a moving object position detection section that detects the current location of the moving object, a display that displays the map data and the current location of the moving object, etc., the current location of the moving object, and the destination. an operation input section for setting etc.;
In a mobile navigation device equipped with a route search unit that calculates a recommended route to a destination, when the recommended route to the destination is determined, the map that was displayed before setting the destination is A navigation device for a mobile body, characterized in that a recommended route is displayed, display of information data other than the recommended route is restricted, and detailed information data regarding the recommended route is additionally displayed. 4. A map data storage section that stores map data, a moving object position detection section that detects the current location of the moving object, a display that displays the map data and the current location of the moving object, etc., the current location of the moving object, and the destination. In a mobile navigation device equipped with an operation input section for setting, modifying, selecting, enlarging, or reducing map areas, etc., detailed information data about the vicinity of the mobile object's current location can be added at any time as the mobile object moves. A navigation device for a mobile body characterized by a display.