JPH10281789A - Navigation apparatus for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation apparatus, for a vehicle, which can contribute toward enhancing the reliability of the guidance of a route even when a running vehicle deviates from a recommended route or even when a demand for searching a route again is operated and input. SOLUTION: When present-position data deviates with reference to route data, the running speed V of a vehicle is detected in Step S80, and a running estimation section S corresponding to the calculation time T1 required for searching a recommended route again is then found on the basis of a definite calculation time T1 required for searching the recommended route again. Then, in Step S90, e.g. a node N4 is extracted as a crossing inside the running estimation section S. Then, in Step S100, a right or left turn inhibit flag F is set in the node N4 in a corresponding crossing. In Step S110, the vehicle advances straight in the node N4 in the crossing. Then, a position P2 at which the vehicle arrives after the computation time T1 is used as a starting position, and route data to be recommended is created on the basis of destination data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle navigation system, and more particularly to a vehicle navigation system capable of re-searching for a recommended route on which a vehicle should travel.

[0002]

2. Description of the Related Art Heretofore, a vehicular navigation apparatus has been known which has an advantage of re-searching a route returning to a recommended route when a vehicle deviates from the recommended route.

For example, as shown in FIG. 6 (a), a recommended route R searched prior to traveling is displayed on a display screen together with a plurality of nodes N1 to N9, and further represents a current position P101 of the vehicle. The vehicle mark M is also displayed.

Here, as shown in FIG. 6A, when the vehicle mark M deviates from the recommended route R, the current position P101 at the time of detecting that the vehicle mark M deviates from the recommended route R is detected.
Was the starting point, and the recommended route from this starting point to the destination was re-searched. In addition, when a request for re-searching is input while traveling on the recommended route, the current position of the vehicle is set as the starting point, and the recommended route from the starting point to the destination is searched again.

[0005]

However, FIG.
As shown in (b), although the vehicle mark M is sequentially updated with its traveling position and displayed, the re-search for the recommended route requires a certain amount of calculation time. To display the recommended route R.

As a result, as shown in FIG. 1, after the vehicle mark M passes through the node N4, for example, an inappropriate recommended route R is displayed, and the reliability of route guidance may be reduced.

[0007] Further, if a request for re-searching is input while traveling on the recommended route displayed so far,
Re-searching the recommended route takes a certain amount of calculation time,
After the re-search is completed, the recommended route R is displayed.

As a result, an inappropriate recommended route R is displayed such that the vehicle mark deviates from another newly displayed recommended route, and the reliability of route guidance may be reduced.

[0009] The present invention has been made in view of the above,
An object of the present invention is to provide a vehicle navigation device that can contribute to improving the reliability of route guidance even when a traveling vehicle deviates from a recommended route or when a request for re-search is input. It is in.

[0010]

According to the first aspect of the present invention,
In order to solve the above-mentioned problem, when a vehicle deviates from a recommended route from a departure point to a destination, a vehicle navigation device that re-searches for a new recommended route has a traveling time corresponding to a calculation time required for the re-search. Setting means for setting the section to be prohibited from turning right and left; and route search means for setting a predicted position to be reached after the calculation time required for the re-search as a departure point and re-searching a recommended route from the departure point to the destination. That is the gist.

According to a second aspect of the present invention, there is provided a vehicle navigation apparatus for re-searching for a recommended route from a departure point to which a vehicle should travel to a destination. Input means for inputting a request for re-searching, and when there is a request for re-searching, a predicted position to be reached after a calculation time required for the re-searching is set as a departure point, and a recommended route from the departure point to the destination is provided. And route search means for searching again.

[0012]

According to the first aspect of the present invention, the travel section corresponding to the calculation time required for the re-search is set to be prohibited from turning right and left, and the predicted position to be reached after the calculation time required for the re-search is set as the departure point. By re-searching the recommended route from the departure point to the destination, even if the vehicle deviates from the recommended route, a new recommended route can be searched again, contributing to improved reliability of route guidance can do.

According to the present invention, when a request for re-searching is made while traveling on the recommended route,
The predicted position reached after the calculation time required for the re-search is set as the starting point, and by re-searching the recommended route from the starting point to the destination, even when a request for the re-search is input by operation,
A new recommended route can be searched again, which can contribute to the improvement of the reliability of route guidance.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a diagram showing a system configuration of a vehicle navigation device 1 applicable to a vehicle navigation device according to a first embodiment of the present invention.
In the figure, GPS (Global Positioning
System) The receiver 5 is a receiver for measuring a current position represented by latitude and longitude and an azimuth based on a radio wave from a satellite received via the antenna 3. The measured current position data is stored in the system controller 7.
Given to.

The system control section 7 has a timer for measuring a time interval, and controls the entire apparatus according to a predetermined control program stored in the ROM section 9. ROM section 9
An execution program and control data corresponding to the navigation function are stored. The vehicle speed sensor 11 detects a traveling speed of the vehicle by generating a pulse signal corresponding to the number of revolutions of the mission by a rotary encoder provided in the mission. The azimuth sensor 13 detects an azimuth by incorporating a geomagnetic sensor or a gyroscope.

The CD-ROM drive 15 is a CD-RO drive.
An apparatus having a drive mechanism for driving M, and driving and reading map data representing a position using latitude / longitude recorded on a CD-ROM or a format similar thereto (hereinafter referred to as map coordinates). CD-ROM drive 1
The map data recorded in 5 is sent to the system control unit 7 using a transmission method such as serial communication or parallel communication. The display control unit 17 includes the system control unit 7 and the VRA
Image data is exchanged with the M unit 19 to render the image data and store the image data in the VRAM unit 19, and the image data stored in the VRAM unit 19 is read out at the display rate and displayed on the display unit 21. . VRAM (Vide
o Random Access Memory) unit 19 develops and stores map data and guidance data that can be displayed on the display unit 21. The display unit 21 includes a liquid crystal display panel and the like, and the display control unit 17
Display the display data created in.

The screen touch panel unit 23 is a touch panel arranged on the screen of the display unit 21, and is a device for inputting position data when there is a contact in association with a position on the screen. Further, by displaying operation guide information on the display unit 21 and touching a desired portion on the screen touch panel unit 23, for example, departure point data, destination data, and the like necessary for a route search are input.

Next, the operation of the vehicle navigation system 1 will be described with reference to FIG. 3 and a flowchart shown in FIG. The system control section 7 is repeatedly executed at predetermined intervals (for example, 10 ms) in accordance with the following control program stored in the ROM section 9.

The system control unit 7 reads menu screen data for setting a destination from the ROM unit 9 in advance, stores the data in the VRAM unit 19 via the display control unit 17, and stores the VRAM data via the display control unit 17. It is assumed that the menu screen data is read from the unit 19 at the display rate and is displayed on the display unit 21. The display unit 21 has a menu screen as a destination setting switch for setting a destination, a route search switch for starting a route search, and a mode for automatically searching for a route again when a route deviates. , A touch switch image such as a re-search mode switch to be set is displayed.

In the first embodiment, the following steps will be described on the assumption that the re-search mode switch on the pop-up menu has been operated by the operator. First, in step S10, when the operator touches the destination setting switch displayed on the screen with the fingertip from above the screen touch panel unit 23, the position data is input to the system control unit 7 via the screen touch panel unit 23. .
The system control unit 7 determines that the position data is within the range of the destination setting switch, reads the destination setting operation screen data for setting the destination from the ROM unit 9, and reads the display control unit 17 The destination setting operation screen data is read out from the VRAM unit 19 at the display rate via the display control unit 17 and displayed on the display unit 21 via the display control unit 17. As described above, the destination data is input to the system control unit 7 while sequentially operating the pop-up menu. Note that the selection method using the pop-up menu is not directly related to the present invention, and thus the description thereof is omitted.

In step S20, first, the current position data detected by the GPS receiver 5 is taken into the system control unit 7. Next, the destination data specified by the operator via the screen touch panel unit 23 and the current position data detected by the GPS receiver 5 are associated with each other and recorded on a CD-ROM based on the well-known Dijkstra method or the like. A search is made for nodes and road links that are present to create route data for a recommended travel route.

In step S30, the system control unit 7
Expands and stores the route data in the VRAM unit 19 via the display control unit 17. Next, map data corresponding to the created wide area map capable of displaying all routes to the destination is stored in the CD-ROM via the CD-ROM drive device 15.
From the VRAM unit 19 via the display control unit 17.
To develop wide-area map data. Next, the system control unit 7
The control unit 17 superimposes the route data on the map data stored in the VRAM unit 19 via the display control unit 17, reads out the route data at the display rate, and displays the recommended route on the display unit 23. Thus, the wide area map from the current position to the destination shown in FIG.

Next, in step S40, the current position data detected by the GPS receiver 5 is taken into the system controller 7. Next, in step S50, the system control unit 7
Converts the map data corresponding to the narrow area map around the current position into C
The map data is read from the CD-ROM via the D-ROM drive device 15 and the narrow-area map data is developed on the VRAM unit 19 via the display control unit 17. Next, V is set via the display control unit 17.
The route data is superimposed on the map data stored in the RAM unit 19 and read at a display rate, and the route data is read out.
To display recommended routes. Thus, as shown in FIG. 3A, the vehicle mark M is displayed on the display unit 23 together with the recommended route R on the narrow area map around the current position P1. The nodes N1 to N9 are shown at the intersection positions.

Next, in step S60, the current position data detected by the GPS receiver 5 is fetched into the system controller 7, and it is determined whether the current position data has deviated from the route data created in step S20. to decide. That is, it is determined whether the latitude / longitude representing the current position data deviates from the route data. If the current position data deviates from the route data, the process proceeds to step S70. On the other hand, if the current position data does not deviate from the route data, the process ends.

Next, in step S70, it is determined whether or not a re-search mode switch has been set in advance in order to automatically search for a recommended route again when the vehicle deviates from the route as a re-route plan. If the re-search mode switch has been set, the process proceeds to step S80. On the other hand, if the re-search mode switch has not been set, the process ends.

Hereinafter, the processing when the re-search mode switch is set to the operation mode will be described in detail. In step S80, first, the traveling speed V of the vehicle is detected by the vehicle speed sensor 11, and then, from a certain calculation time T1 required for re-searching the recommended route, a travel prediction section corresponding to the calculation time T1 required for this re-search. When S is obtained, S = T1 × V.

Next, in step S90, as shown in FIG.
When going straight from 7 to the node N4, for example, the node N4 is extracted as an intersection in the travel prediction section S. Next, in step S100, the node N of the corresponding intersection
4 is set to the right / left turn prohibition flag F.

In step S110, the node N at the intersection
Since the right / left turn prohibition flag F is set at No. 4, it is assumed that the vehicle goes straight through this node N4. The position P2 that arrives after the calculation time T1 required for the re-search is set as the departure point, and the node recorded on the CD-ROM based on the known Dijkstra method or the like from the destination data specified by the operator last time Search for road links and create route data for recommended travel routes.

Next, the system control unit 7 reads out map data corresponding to the narrow area map around the current position from the CD-ROM via the CD-ROM drive unit 15 and the VRAM unit 19 via the display control unit 17. To develop narrow-area map data. Next, the route data is superimposed on the map data stored in the VRAM unit 19 via the display control unit 17 and read at a display rate, and the recommended route is displayed on the display unit 23. Thus, as shown in FIG. 3B, the vehicle mark M is displayed on the display unit 23 along with the recommended route R on the narrow area map around the current position P2. Next, step S4
Returning to 0, the above processing is repeated.

As described above, the calculation time T1 required for re-searching
Is set to prohibit the right and left turns, and the position arriving after the calculation time T1 required for the re-search is set as the departure point, and the recommended route from the departure point to the destination is re-searched, whereby the traveling vehicle Also deviates from the recommended route,
A new recommended route can be searched again, which can contribute to improving the reliability of route guidance.

(Second Embodiment) The second embodiment of the present invention is applicable to the system configuration of the vehicle navigation device 1 shown in FIG. In the vehicle navigation device 1 according to the second embodiment, the following steps will be described on the assumption that the operator has operated the route search switch on the pop-up menu. Note that the processing shown in steps S10 to S60 and steps S70 to S110 is the same as each step shown in the first embodiment, and a description thereof will be omitted.

If it is determined in step S60 that the current position data does not deviate from the route data, the process proceeds to step S210. In step S210,
It is determined whether the route search switch has been turned on. If the route search switch has been turned on, the process proceeds to step S220. On the other hand, if the route search switch has not been operated, the process ends.

Next, in step S220, step S220
As in the case of 80, the traveling speed V of the vehicle is detected by the vehicle speed sensor 11, and then, from a certain calculation time T1 required for re-searching the recommended route, a travel prediction section S corresponding to the calculation time T1 required for this re-search. S = T1 × V

Next, in step S230, step S230
On the route data created in 20, a position P4 ahead of the travel prediction section S is calculated. As shown in FIG. 5A, in the case of a route that turns right from the current position P3 to the node N7, the traveling prediction section S is S = S1 + S2.

Next, in step S240, the system control section 7 sets a position P4, which is ahead of the current position P3 by a travel prediction section S, as a departure place. Next, step S2
In 50, the system control unit 7 searches for a node or a road link recorded on the CD-ROM based on the known Dijkstra method or the like from the departure place and the destination data designated by the previous operator. Create route data for recommended travel routes.

Next, the system control unit 7 reads out map data corresponding to the narrow area map around the current position from the CD-ROM via the CD-ROM drive unit 15, and the VRAM unit 19 via the display control unit 17. To develop narrow-area map data. Next, the route data is superimposed on the map data stored in the VRAM unit 19 via the display control unit 17 and read at a display rate, and the recommended route is displayed on the display unit 23. In this way, as shown in FIG. 5B, the vehicle mark M is displayed on the display unit 23 along with the recommended route R on the narrow area map around the current position P4. Next, step S4
Returning to 0, the above processing is repeated.

As described above, when there is a request for a re-search while traveling on the recommended route, the calculation time T required for the re-search is calculated.
By setting the position that arrives after 1 as the departure point and re-searching for the recommended route from this departure point to the destination, it is possible to re-search for a new recommended route even when a request for re-search is input. This can contribute to improving the reliability of route guidance.

[Brief description of the drawings]

FIG. 1 is a vehicle navigation device 1 applicable to a vehicle navigation device according to a first embodiment of the present invention.
1 is a diagram showing a system configuration of FIG.

FIG. 2 is a flowchart for explaining the operation of the vehicle navigation device 1.

FIG. 3 is a recommended route R on a narrow map around the current position P1.
(A) and (b) showing a recommended route R on a narrow area map around the current position P2.

FIG. 4 is a flowchart for explaining the operation of the vehicle navigation device 1.

FIG. 5: Recommended route R on a narrow area map around the current position P3
(A) and (b) showing a recommended route R on a narrow area map around the current position P4.

6A is a diagram showing a recommended route R on a narrow area map around a current position P101 in a conventional vehicle navigation device, and FIG. 6B is a diagram showing a recommended route R on a narrow area map around a current position P103. ).

[Explanation of symbols]

 5 GPS receiver 7 System control unit 15 CD-ROM drive 17 Display control unit 21 Display unit 23 Screen touch panel unit

Claims (2)

[Claims] When a vehicle deviates from a recommended route from a departure point to a destination, a vehicle navigation device for re-searching for a new recommended route includes a driving section corresponding to a calculation time required for the re-search. Setting means for setting the right / left turn prohibition; and a route search means for re-searching a recommended route from the departure place to the destination, with a predicted position reaching after a calculation time required for the re-search as a departure point. Characteristic vehicle navigation device. 2. A vehicle navigation device for re-searching a recommended route from a departure point to a destination to which a vehicle should travel, an input means for inputting a request for a re-search while the vehicle is traveling on the recommended route; If there is a request, a predicted position reached after a calculation time required for the re-search is set as a departure point, and route search means for re-searching a recommended route from the departure point to the destination is provided. Vehicle navigation device.