JP3761903B2 - Navigation system route guidance information display method - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a navigation system, and more particularly to a route guidance information display method for a navigation system that guides a travel route based on a predetermined passing point on a set course from a current position of a moving object to a destination.
[0002]
[Prior art]
For navigation systems that assist in driving by displaying the current position of a moving object such as a car on a map displayed on the display device, (1) Based on the radio wave (position information) from the satellite GPS method for determining position, (2) Sign post method for recognizing the position of the vehicle based on position information from a sign post installed beside the road, and (3) Distance information and direction information from the distance sensor and direction sensor There is a fully autonomous driving method that calculates and determines the position of the vehicle based on it, and (4) is a mixed autonomous driving method of (1) and (3).
[0003]
In addition, in the navigation system of the fully autonomous driving method (3) or the mixed autonomous driving method (4) above, a course is selected from any route between the current position of the vehicle and the destination in advance. Set a specific course on the route (for example, an intersection, a T-junction, or a three-way road) as a scheduled driving course, register its coordinate values as course data, and actually drive the car along the planned driving course Route guidance system that displays the exact position of the vehicle by comparing the coordinate value of the registered specific point with the coordinate value calculated based on the azimuth data and distance data obtained by autonomous traveling when traveling Some have
[0004]
On the other hand, while traveling under the control of the navigation system, a map and at least a display indicator of the position of the vehicle are usually displayed on the display device. It is convenient for the driver to display information such as average speed. For such purposes, there is a navigation device that calculates the travel information and displays it on a part of the display screen.
[0005]
[Problems to be solved by the invention]
And when driving information (route guidance information) is displayed on a part of the display screen with such a navigation device, the size of the display screen is limited for the purpose of use that the navigation device is mounted on a car. Therefore, the driving information is temporarily displayed when the driver presses a button on the remote control device or the like so that the driving information is not always displayed on the display screen so as not to disturb the display of the map. If the driving information can be automatically displayed at a necessary point during driving instead of such a conventional driving information display method, it is convenient that the driver does not need to press a button such as a switch or a remote control device.
[0006]
The present invention has been made in view of the above requirements, and in a navigation system having a route guidance system, route guidance information (travel information) can be automatically displayed at a specific point on the travel route while traveling. The purpose is to provide a display method of route guidance information of a navigation system.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a first invention is a navigation system that is mounted on a mobile body, can display map information on a display means, and can set a waypoint between a current position and a destination. Calculate the distance between the latest waypoint in the direction of travel and the current position among the preset waypoints, and if the calculated distance is within the predetermined distance, the route guidance information on the latest waypoint and , Route guidance information other than the most recent waypoint is displayed on the map, and further, the route guidance information is displayed to determine whether the moving body has passed the most recent waypoint, and to display the most recent waypoint. When passing, it is stopped after elapse of a predetermined time or after moving a predetermined distance.
[0008]
The second invention is characterized in that, in the first invention, the route guidance information related to the latest waypoint includes distance information to the waypoint.
[0009]
Furthermore, the third invention is the first or second invention, wherein the route guidance information related to other than the most recent waypoint is the average speed, the travel distance, the total number of waypoints on the route, and the number of remaining waypoints on the route. It is characterized by including at least one of these.
[0010]
[Action]
In the first invention, when the moving body approaches within a predetermined distance toward the nearest waypoint, route guidance information is displayed on the map. The display of this information is stopped after a predetermined time has elapsed or after a predetermined distance movement when it is determined that the waypoint has been passed.
[0011]
According to a second invention, in the first invention, the map is obtained by calculating the distance to the waypoint when the moving body approaches the waypoint and the distance between the waypoint and the moving body is within a predetermined distance. Display with
[0012]
In a third aspect of the present invention, in the first or second aspect of the invention, when the moving body approaches the way point and the distance between the way point and the moving body is within a predetermined distance, information relating to other than the nearest way point Not only, but at least one of the average speed, the travel distance, the total number of waypoints on the route, and the number of remaining waypoints on the route is displayed together with the map.
[0013]
【Example】
FIG. 1 is an explanatory diagram of a route guidance information display method of a navigation system according to the present invention. FIG. 1 (a) shows a vehicle (own vehicle) 2 traveling toward the way point 1, but the distance between the way point 1 and the vehicle 2 is, for example, 400 m or more away. Although the map around the car 2 is displayed, the driving information is not displayed. Next, when the car 2 approaches the way point 1 and the distance between the way point 1 and the car 2 is within 400 m, the driving information 3 is displayed on the right side of the screen 10 as shown in FIG. In FIG. 1B, the travel information 3-1 indicates the distance to the waypoint being guided, the set WP number 3-2 indicates the total number of waypoints set on the travel route from the departure point to the destination, and the remaining WP. Formula 3-3 shows the number of remaining waypoints obtained by subtracting the number of waypoints passed from the set WP number. Further, when the vehicle 2 recognizes passing the waypoint 1 or is away from the waypoint 1 by 400 m or more, the display of the driving information 3 is stopped, and as shown in FIG. return.
[0014]
In the embodiment, the distance between the way point 1 which is a reference for displaying the driving information 3 and the car 2 is 400 m. However, the distance is not limited to this, and may be 400 m or less or 400 m or more. And the comparison distance between the waypoints passed and the car may be different. Moreover, you may comprise so that the distance of the way point 1 used as a reference | standard and the vehicle 2 can be changed with the kind of vehicle or a road condition. Furthermore, the display position of the travel information 3 on the screen and the type of travel information to be displayed are not limited to the above-described example, and the travel information 3 may be displayed at a position that does not overlap the display of the main part of the map. There may be fewer or more types of travel information than described above.
[0015]
FIG. 2 is a block diagram showing the configuration of an embodiment of a navigation device to which the route guidance information display method of the navigation system of the present invention can be applied, and FIG. 3 shows the operation of the processing unit in the navigation device of FIG. It is a flowchart. The present invention is a completely autonomous navigation device and a GPS-type navigation device that sets the positions of a plurality of specific points (way points) on a travel route, and the vehicle position and the way points on the map during travel. It can be applied to a navigation system that guides the course of a car by displaying
[0016]
In FIG. 2, 21 is a power source, 22 is an input device such as a remote controller, and 23 is a non-volatile memory SRAM that stores course data such as set waypoints, which corresponds to the second storage unit. 24 is an internal memory for developing map data, temporarily storing course data, and storing programs such as a course setting program, 25 is a CPU that controls the entire navigation device and execution of the navigation program, and 26 is GPS. GPS receiver (receiver) that receives the position signal (radio wave) and decodes it as position information, 27 is an orientation sensor such as a gyro, 28 is a distance sensor, 29 is map information, and program means such as a navigation program and course setting program Is a CD-ROM storing the image data, which corresponds to the first storage unit, and 30 is a display unit (display). A b).
[0017]
The operation of the navigation apparatus shown in FIG. 2 in the route guidance information display method according to the present invention will be described below with reference to FIG. In the navigation apparatus of FIG. 3, when the power source 21 is turned on, the navigation program and the course setting program are read from the CD-ROM 29 into the internal memory 24 and the navigation operation is started. The driver uses the input device 22 to set the destination.
[0018]
[S1] The position information from the GPS obtained by the GPS receiver 26 is obtained, and the vehicle position (latitude and longitude) is set based on the position information. The CPU 5 calculates the distance between the destination and the vehicle position, determines the scale, reads the map information including the vehicle position from the CD-ROM 29 and develops it in the internal memory 24, and displays the map and the vehicle position coordinates on the display device. indicate.
[0019]
[S2] On the other hand, in order to perform autonomous traveling during traveling, data from the direction sensor 27 and the distance sensor 2 are sampled at predetermined time intervals, converted into digital data, and input to the CPU 5. The CPU 5 calculates the distance L between the current position of the car and the next way point from the result of the navigation process. In this case, the position (latitude, longitude) of the way point can be obtained from the course data stored in the SRAM 23 in the format shown in FIG. FIG. 4 shows an example of the set course data table. In FIG. 4, the course data table shows absolute coordinate values (latitude / longitude) indicating the positions of waypoints 1 to n and relative coordinates indicating the course direction at the waypoints. It is stored as a set of values (latitude / longitude).
[0020]
[S3] The display timing of the travel information is determined based on the distance between the waypoint obtained in step S2 and the current position of the vehicle. If the distance between the waypoint and the current position of the car is within 400 m, step S4 and subsequent steps are executed, and if it is greater than 400 m, the process returns to step S1.
[S4] If the currently displayed screen displays a normal map (refers to a screen that does not display travel information (see FIG. 1A)), execute step S5 and subsequent steps to display the travel information. If so (see FIG. 1B), step S7 and subsequent steps are executed.
[S5] Display information values are calculated and various display information values (distance to waypoints, total number of waypoints, remaining number of waypoints, average speed, travel distance, etc.) are calculated.
[S6] The travel information is displayed overlaid on the displayed map (see FIG. 1B), and the process returns to step 1 and is repeated.
[0021]
[S7] It is determined whether or not the vehicle has passed the waypoint. If the vehicle has not passed, the process returns to step S1 while the traveling information is displayed, and the process is repeated.
[S8] When the vehicle passes the way point, the CPU 5 calculates a distance L ′ between the way point passed and the current position of the car from the result of the navigation process.
[S9] The erasure timing for displaying the travel information is determined based on the distance L ′ obtained in step S8. If the distance between the waypoint that has passed and the current position of the car is within 400 m, the process returns to step S1 while the driving information is displayed and the process is repeated.
[S10] If the distance L ′ is greater than 400 m, the superimposed display of the traveling information is stopped, the display is switched to the normal screen display, and the process is repeated in step S1.
[0022]
In the present embodiment, the starting position of the vehicle is set by the position information from the GPS obtained by the GPS receiver 26 in step S1, but in the case of a completely autonomous navigation device that is not a mixed type with GPS, the input device 22 is used. The current location can be set by.
[0023]
In the present invention, the display information may be erased at a timing corresponding to the passage of time or distance after passing through the latest waypoint, or may be erased at both timing of time and distance. For example, the information may be deleted when a predetermined distance has not elapsed within a predetermined time. In addition, when information is erased, it is possible to read out the immediately preceding information by some operation means of the device. In this case, it is possible to provide storage means for temporarily storing the information when the information is erased by the method described above. In addition, a method of temporarily storing the information at the time of display may be used, or a method of storing information that sequentially passes may be used.
[0024]
【The invention's effect】
As described above, according to the present invention, driving information is automatically displayed based on the distance to the waypoint on the driving route without operating switches or buttons during driving as in the conventional method. Can do.
[0025]
Therefore, the driver does not miss the driving information that he / she needs to forget to press the switch or button as in the conventional method, and the driver is careful about the timing of pressing the switch or button. There is nothing.
[0026]
In addition, since the travel information is not automatically displayed after a certain distance after passing the way point, the travel information displayed on the screen does not hinder navigation.
[0027]
Furthermore, since the waypoint information is displayed together with the map during the waypoints that are truly needed, the map information around the vehicle is usually displayed as widely as possible, and the waypoint information is displayed on the map when necessary. Can provide the necessary information without sacrificing the map display.
[0028]
In addition, since it provides multiple route guidance information that includes not only information on the most recent waypoints but also other information, it is possible to know information about the various waypoints (number of waypoints, etc.) that will be passed in the future. , You can afford to drive.
[0029]
In addition, even if you pass a waypoint, information about that waypoint does not immediately disappear from the screen, so if you are worried whether the waypoint has passed correctly, you can be sure that it is correct. .
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a route guidance information display method of a navigation system according to the present invention.
FIG. 2 is a block diagram showing a configuration of an embodiment of a navigation apparatus to which the route guidance information display method of the navigation system of the present invention can be applied.
3 is a flowchart showing the operation of a processing unit (CPU 5) in the navigation device of FIG.
FIG. 4 is an example of a course data table.
[Explanation of symbols]
1 ... car position 2 ... way point 3 ... running information (route guidance information)
10. Display screen 23 ... SRAM (second storage unit)
24 ... Internal memory 25 ... CPU (Processor)
27 ... Direction sensor 28 ... Distance sensor 29 ... CD-ROM (first storage unit)
30 ... Display section

Claims (3)

In a navigation system that is mounted on a moving object, can display map information on a display means, and can set a waypoint between the current position and the destination,
Calculate the distance between the nearest waypoint in the direction of travel and the current position among the preset waypoints,
When the calculated distance is within a predetermined distance, the route guidance information related to the latest waypoint and the route guidance information related to other than the latest waypoint are displayed on the map,
Further, the display of the route guidance information determines whether a moving body has passed through the most recent waypoint, and is canceled after a predetermined time or after a predetermined distance movement when passing through the most recent waypoint. Characteristic navigation system route guidance information display method. The route guidance information display method of the navigation system according to claim 1, wherein the route guidance information on the latest waypoint includes distance information to the waypoint. 3. The route guidance information related to other than the most recent way point includes at least one of average speed, travel distance, total number of way points on the route, and number of remaining way points on the route. Display method of route guidance information of the navigation system described in 1.

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