JPH11304511A - Navigation device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation device for a vehicle capable of preventing the erroneous recognition of a user by change, and suppressing the feeling of incompatibility even in the case of including an opening scheduled road changeable to an already opened road in map data be forehand. SOLUTION: The CPU 12 of this navigation device 10 obtains an already opened road link and an opening scheduled road link from a CD-ROM 28 in a discriminated state, judges whether or not an opening scheduled date is passed and whether or not the actual traveling track of the vehicle and the opening scheduled road link match, etc., for the opening scheduled road link, and in the case that the opening scheduled date is passed and it is confirmed that the opening scheduled road link is actually constructed as scheduled by matching confirmation by the traveling of the vehicle, changes the opening scheduled road link to the already opened road link, stores it in a memory 30, utilizes it for route guidance and thereafter, and handles the opening scheduled road link as the already opened road link.

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 that provides route guidance using map data including a road link to be opened.

[0002]

2. Description of the Related Art Conventionally, a navigation function of a vehicle includes dead reckoning navigation, map matching, and GPS. In the dead reckoning, the traveling locus of the vehicle is obtained by a direction sensor and a distance sensor mounted on the vehicle,
Find the relative position of the vehicle. In the map matching, a traveling locus of a vehicle obtained by dead reckoning navigation is compared with a road shape of map data stored in advance, and a position of the vehicle on a map is obtained by determining a passing road. Furthermore, the absolute position (latitude, longitude) of the vehicle obtained by GPS using the position of the vehicle obtained by map matching
In addition to the information, it is more accurate. The navigation device also has a route guidance function of calculating an optimal (recommended) travel route to a destination by inputting a departure place and a destination, and presenting the calculated route to a driver. By using this function, the user can drive with less fatigue without getting lost.

[0003] Incidentally, roads are appropriately maintained and newly constructed or abolished. Therefore, the road configuration at the time when the map data is created may be different from the road configuration when the navigation device actually uses the map data. In this case, optimal route guidance may not be provided. for that reason,
In order to provide appropriate route guidance, it is necessary to frequently update (re-purchase) map data.

Various proposals have been made to reduce the frequency of updating the map data. For example, JP-A-7-
In the system disclosed in Japanese Patent No. 49238, in the case of large-scale new road construction such as a bypass road or a toll road, it is generally known that the construction route and the date of opening the road are known several years before completion. Focusing on this, map data containing information on roads to be opened in advance is used. In this system, the road is indicated by a dotted line on the map before the road is opened, and is changed to a solid line and displayed on the map after the road is opened. In this system, the use restriction of the corresponding road is performed based on the road opening date, and the relevant road is displayed as a solid line on a map before being used for route guidance. As a result, even if the road is opened after the creation of the map data, the display and use of the new road is started at an appropriate timing, and the frequency of updating such as repurchasing the map data can be reduced.

[0005]

However, since the construction of a new road takes a long time, the initial plan is often changed. For example, the planned route may be different from the actually completed road route, or the completion date may be changed. In this case, even if the road to be opened is changed to an already opened road after the road completion date on the map data, it cannot be used for route guidance etc. because it is different from the actual road, and the display map and the actual road However, there is a problem that the user feels strange due to the difference.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to prevent a user from erroneously recognizing due to a change even when a planned openable road that can be changed to an opened road is included in map data in advance. It is an object of the present invention to provide a vehicular navigation device capable of suppressing discomfort.

[0007]

According to a first aspect of the present invention, there is provided a map in which a data group of a road link that has been opened and a data group of a road link that is to be opened are identifiably stored. A data storage means, a data reading means for reading data from the map data storage means, and processing of the read data of the opened road link and the read scheduled road link in another form to calculate available roads and to provide vehicle route guidance. And a route guidance unit that performs the map matching. The matching determination unit that determines whether the road link to be opened and the actual travel locus of the vehicle are map-matched. When it is determined, the form of the road link to be opened is changed to the form of the opened road link, and the same processing as the opened road link can be performed. , A form changing means for and having a.

[0008] Here, the form of the road link to be opened is
This is a form displayed as a dotted line on the map. The form of the opened road link is a form displayed as a solid line or the like on a map, and is a form actively used for route guidance and the like.

According to this configuration, by performing the map matching, it is determined whether or not the shape and form of the planned open road and the actually opened road match, and it is determined that the road actually matches. Only when this is done, the road is actively changed to a form that can be used for route guidance and the like, so that erroneous recognition of the user due to the existence of the road to be opened and suppression of discomfort to the user can be performed.

[0010] To achieve the above object, the second
In the first invention, in the first invention, the matching determination unit does not set the scheduled road link to be a target of map matching before the scheduled opening of the scheduled road link,
After the scheduled opening date, it is characterized as a map matching target.

According to this structure, the map matching process is not performed even if the vehicle runs around the road to be opened before the scheduled opening date, so that the processing load can be reduced.

In order to achieve the above object, a third
In the second invention, in the second invention, when map matching has not been performed on the target road link to be opened after the scheduled date of opening, the route guide unit gives priority to using the target road link to be opened. It is characterized in that it is not used for the initial guidance route by reducing the degree.

Here, the initial guidance route is presented first after judging that it is optimal in accordance with a predetermined rule (for example, arrival time priority or toll road use priority) in order to reach the destination desired by the user. One or more guidance routes.
The use priority is a selection priority of a road link used for a route search.

According to this configuration, even when the road link to be opened is already opened, map matching is not performed, and the shape and form (for example, route) of the road link to be opened and the road actually opened match. For a road for which it is not known whether or not it is possible to actively use the road. As a result, accurate and highly reliable route guidance using only roads whose routes and the like are reliably recognized can be performed.

In order to achieve the above object, the fourth
In the third invention, in the third invention, when a re-search request is made for the searched initial guide route, the route guide unit increases the use priority of the target road link to be opened and changes the route to the guide route. It is characterized by using.

Here, the re-search request is requested by the user when the initially provided initial guidance route is not adopted.

According to this configuration, it is not possible to actually confirm the opening route or the like, but it is possible to provide a guide route that meets a user's request using a road through which vehicles can pass.

In order to achieve the above object, the fifth
The invention of the fourth aspect is characterized in that, in the fourth aspect, when a road link scheduled to be opened with a higher priority is used for a guide route, a warning means indicating a possibility of being different from an actual road form is provided.

Here, the warning means is a warning by a display or a sound, for example, "A guide is provided on a route including a road to be opened. Drive according to actual traffic regulations. ] Or "The XX part of the guidance route presented now may differ from the actual road form." ] Is output. It is also possible to simply output a warning light or output a warning sound.

[0020] According to this configuration, even when the road to be opened after the opening, in which the actual map matching has not been performed, is used for route guidance, it is possible to call the user's attention, thereby suppressing the user's discomfort. can do.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to the drawings.

FIG. 1 is a block diagram illustrating the concept of the configuration of a vehicle navigation device 10 according to the present embodiment. The CPU 12 that performs arithmetic processing for searching for a guidance route
A GPS sensor 14 for acquiring information from a GPS satellite for recognizing the position of the vehicle, a gyro sensor (azimuth sensor) 16 for detecting the rotation of the vehicle and recognizing the direction in which the vehicle is headed, and the gyro sensor A vehicle speed sensor 18 and the like for performing self-sustaining traveling in accordance with information from the vehicle 16 are connected. Further, a display device 20 such as a display for providing a user with a searched guide route, a vehicle position, various messages, a speaker 22 for providing a message by voice, and the like are connected to the CPU 12 as output devices. ing. Further, the CPU 12 has an input device 2 for inputting a user's request for a departure point, a destination, and a guide route search.
4. A clock 26 for managing the current date and time is also connected.

Further, the CPU 12 is connected to a CD-ROM 28 as map data storage means. In the CD-ROM 28, link data of a road that has already been opened and link data of a road that is to be constructed and that is to be opened at the time of map data creation are recorded as different data groups. The CPU 12 processes the data group in another form. For example, when the data group is displayed on the display device 20 or the like, the data of the opened road link A is displayed as, for example, a solid line as shown in FIG. It is used for navigation processing such as. On the other hand, the data of the road link B to be opened is displayed by, for example, a dotted line, and is not used for a navigation process such as route guidance unless a predetermined process described later is performed. It should be noted that the data of the scheduled road link includes data such as the scheduled date of opening of the target road. In addition to the link data, the CD-ROM 28 stores information necessary for the navigation apparatus 10 to search for a guide route and perform route guidance based on the guide route, such as various types of regulation information and information on facilities around the road. ing. Further, the CPU 12 has a memory 30 for storing processing contents and processing results based on the data acquired by the CPU 12.
Is connected. This memory 30 is a RAM or EEP
It is composed of a ROM or the like.

The CPU 12 stores the actual travel locus of the vehicle recognized based on data from the GPS sensor 14, the gyro sensor 16, the vehicle speed sensor 18 and the like and the CD-ROM 2
8 is compared with a road form based on the road link data read from FIG. 8, and map matching for recognizing which road on the map the vehicle is traveling is performed. A characteristic feature of the present embodiment is that the map matching targets the opened road link data and the planned road link data, but when the map matching is performed on the planned road link data, the map matching is performed. Based on the result, the processing form for the scheduled road link data is to be changed.

The CPU 12 checks the form of the road link at a predetermined timing, for example, at the time of turning on the power of the navigation apparatus 10 or at a predetermined interval even during the power on, at the request of the user, etc., and processes the map data according to the form of the road link. Is changing. For example, the user can input via the input device 24,
When a route guidance is requested by inputting a departure place, a transit point, a destination, and the like, the CPU 12 reads map data of an area to be route guided from the CD-ROM 28 and displays the map data as a solid line as shown in FIG. Along with the road link A and the road link B to be opened indicated by a dotted line, the position mark 32 of the own vehicle recognized based on the information from each sensor, etc. (although not shown, information on surrounding facilities may be displayed at the same time). Is displayed on the display device 20. The CPU 12 does not use the planned road link B indicated by the dotted line in the normal route guidance, but merely indicates that the planned road exists when the map data is created. As shown in FIG. 3, the CPU 12 changes the usage restriction to the route guidance based on the conditions 1 and 2 for the road link B to be opened. The condition 1 is classified according to whether the scheduled road link B is used before or after the scheduled opening date, and the condition 2 is determined based on whether the scheduled road link B is used for map matching. Divided.

For example, when the route guidance area is displayed on the display device 20 and the road link B to be opened is included, and before opening (condition 1), the road link B to be opened is It is displayed as a dotted line on the display device 20 and is excluded from the targets of map matching during vehicle running, and its use for route guidance is also prohibited. On the other hand, when the scheduled road link B is included and after the traffic is opened (condition 1), the CPU 12 further classifies cases according to whether or not the corresponding scheduled road link B has been used for map matching in the past processing. (Condition 2). If the road link B is to be opened after opening and is not used for map matching, the road link B to be opened is displayed by a dotted line on the display device 20. As will be described later, since the road link has already been opened at this point, the CPU 12 recognizes the road link as a semi-open road link and uses the road link for map matching during vehicle driving. However, it is unclear whether the corresponding actual road link has been completed in the same form as the display on the display device 20 (the road form announced at the time of creating the map data and the completed road form (route, etc.) have changed. Therefore, the use priority of the road link B to be opened is lowered, and the road link is not used for the initial guidance route first presented to the user. In other words, at this time, the road link is identified as the road link to be opened. But,
When the user makes a re-search request for the initial guide route, the road link is allowed to travel, so the use priority of the road link B to be opened is raised and the link is used as a part of the re-search guide route. I do.

On the other hand, after the opening (condition 1), the corresponding road link B to be opened has already been used for map matching.
When it is determined that the planned road and the actual traveling locus match by a predetermined amount or more, the CPU 12 displays the planned road link B, which has been displayed as a dotted line, as a solid line, and uses the link B for map matching during vehicle driving. And use it from the initial route guidance. When the map matching results match once, the CPU 12 stores the link data of the corresponding road in the memory 30, and thereafter performs the processing assuming that the road link data has been opened.

The procedure for changing the form of the road link B to be opened described with reference to FIG. 3 and the method of using the same will be described in detail with reference to the flowcharts of FIGS. In addition, the form of the planned road link is changed to the form of the opened road link based on the matching determination means for determining whether or not the actual road trajectory of the vehicle is map-matched with the actual road track. It is assumed that the CPU 12 includes a form changing means for enabling the same processing as the opened road link.

First, the procedure for changing the form of a road link to be opened will be described with reference to the flowchart of FIG. As described above, the CPU 12 distinguishes and acquires the road link data of the opened road and the planned road from the CD-ROM 28 in order to start the road link form check at a predetermined timing (S100). At this time, the obtained road link data includes an already-opened road link that has already been opened before map data creation and a road route or the like has been determined, or has been opened up to the present time (when checked by the CPU 12) after map data creation. Include all semi-open roads for which confirmation of road routes and the like has not been completed by map matching described later, and all planned open roads that have not yet been opened at the present time.

Subsequently, the CPU 12 determines whether or not the road link B to be opened is included in the acquired road link data (map matching data) (S101). If the scheduled road link B is included, the scheduled date and time of the corresponding scheduled road link B is stored in the CD-ROM 28.
(S102), and compares it with the current date and time obtained from the clock 26 to determine whether the current date and time is past the scheduled opening date and time (S103). If the current date and time has already passed the scheduled opening date and time, the form changing means in the CPU 12 changes the corresponding scheduled opening road link B to a semi-opening road link (S104). Then, the current position of the vehicle is calculated using the opened road link and the semi-opened road link, and the display as shown in FIG. 2 is performed (S105). At this time, the road link B to be opened is displayed as a semi-open road link, so if necessary, the color of the dotted line or the type of line may be changed so that the relevant road link has already passed the scheduled date and time. It is desirable to present something.

Subsequently, the matching determination means in the CPU 12 determines whether or not the actual traveling locus of the vehicle and the semi-open road link have been matched by Ym or more based on information from each sensor (S106). . Since a road link is usually defined for each intersection, the Ym is, for example, about 200 m, and 200 m for one link.
If the above map matching is obtained, the target road link matches the map data stored in the CD-ROM 28, and it can be considered that the road link scheduled to be opened has been completed as originally planned. If the actual travel locus matches the semi-open road link by Ym or more, the form changing means in the CPU 12 recognizes and changes the semi-open road link as a formal opened road link and changes the link (S10).
7) The display of the road link on the display device 20 is corrected from a dotted line to a solid line (S108). At this time, the CPU 12 stores the contents of the correction in the memory 30 (S109), and ends the form change processing of the road link to be opened. When the road link is read from the CD-ROM 28 next time, the corrected road link stored in the memory 30 is stored as an opened road link when the CD-ROM 28 is created. Treats the same as a road link that is.

On the other hand, in (S101), the CPU 12
If it is determined that the acquired map matching data does not include the planned road link (including the semi-open road link), the current position of the vehicle is calculated and displayed using only the opened road link. 20 is displayed (S110), and the process of changing the form of the road link to be opened ends. Further, in (S106), when the actual traveling locus of the vehicle and the semi-open road link do not match by Ym or more, the semi-open road link (opening planned road link) is not constructed on the originally planned route, or is not constructed. Is not completed yet, it is determined that the reliability of the road drawing displayed on the display device 20 is low, and the display form of the road link is maintained as a dotted line to form the road link to be opened. The change processing ends.

In the above-described process of checking the form of a road link to be opened, the navigation device 10 does not need to operate for route guidance, and the CPU 12 appropriately determines the actual traveling locus of the vehicle during free running of the vehicle. It is desirable to recognize and correct the data. Therefore, when a road link to be opened exists in an area not particularly used by the user, the correction to the opened road link is not performed, the dotted line display and the like are maintained, and the processing load such as the matching processing is reduced. .

As described above, the CPU 12 constantly checks the road link form. Then, when there is a request for road guidance from the user of the navigation device 10,
The CPU 12 reads the road link data corresponding to the route guidance area from the CD-ROM 28 and the memory 30, and starts the route guidance process. First, it is determined whether or not the current process is an initial (first time) guide route search (S20).
0). If it is determined that the initial route guidance search is performed, the use priority of the semi-open road link is lowered, and a search for an accurate and reliable guide route is performed using only the road link recognized as the opened road. Is performed (S201). The search for the guide route is performed by a known method. Then, the searched guidance route is presented to the display device 20 (S
202). The user determines whether or not to approve the presented guide route, and if so, inputs a route determination command using the input device 24. When confirming the route determination command, the CPU 12 starts route guidance using various displays and voice guidance (S204).
Thereafter, the vehicle is guided to the destination, and a series of route guidance processing ends.

If the user does not approve the presented initial guidance route, a re-search command or the like is issued via the input device 24 to request a re-search for the guidance route. The CPU 12
When the input of the re-search command is confirmed, the use priority of the semi-open road link is increased, and the search for the next candidate guide route is started using the opened road link and the semi-open road link (S205). ). Then, the CPU 12 determines whether the searched guide route includes the semi-open road link (S206). When the semi-open road link is not included in the re-searched guide route, that is, when the navigation device 10 uses only the data that the navigation device 10 can completely understand about the route of the road, etc. Proceeding to (S202), the processing after (S202) is continuously performed. On the other hand, when the re-searched guide route includes the semi-open road link, the presented guide route includes the semi-open road link, and the road route, the traffic regulation, and the like displayed on the display device 20 are different from the actual situation. A warning that there is a possibility is issued using the display device 20, the speaker 22, and the like (S207). The warning is, for example, as shown in FIG. Drive according to actual traffic regulations. ] Or "The XX part of the guidance route presented now may differ from the actual road form." ].

Subsequently, the CPU 12 performs the processing after (S202) to guide the vehicle to the destination, and then ends a series of route guidance processing. Note that the CPU 12 outputs a warning to alert the user to the use of the semi-open road link before or simultaneously with the display of the semi-open road link. However, the CPU 12 actually reaches the semi-open road link during the actual route guidance in (S204). It is desirable that the warning be output again at this point to alert the user.

As described above, when the route guidance of the vehicle is performed,
The use of uncertain road links is minimized, and if used, the user is immediately notified of the fact, so even if the planned roads that can be changed to open roads are included in the map data in advance, It is possible to reliably prevent the user from erroneously recognizing the change and to suppress a sense of discomfort. Also, CD-
The data can be corrected at an appropriate timing without replacement of the ROM or the like.

[0038]

According to the present invention, even if a planned road that can be changed to a road that has already been opened is included in the map data in advance,
It is possible to provide a vehicular navigation device capable of preventing a user from erroneously recognizing a change and suppressing a sense of incongruity.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a vehicle navigation device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating a display example of an opened road link and an expected road link of the vehicle navigation device according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a case of processing conditions of the vehicle navigation device according to the embodiment of the present invention.

FIG. 4 is a flowchart illustrating a form change procedure of a road link to be opened by the vehicle navigation device according to the embodiment of the present invention.

FIG. 5 is a flowchart illustrating a route guidance procedure of the vehicle navigation device according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram illustrating an example of a warning display when route guidance is performed using a scheduled road link of the vehicle navigation device according to the embodiment of the present invention.

[Explanation of symbols]

10 navigation device, 12 CPU, 14 GP
S sensor, 16 gyro sensor, 18 vehicle speed sensor,
20 display devices, 22 speakers, 24 input devices, 2
6 clocks, 28 CD-ROMs, 30 memories.

Claims (5)

[Claims] 1. A map data storage means for storing a data group of an opened road link and a data group of a road link to be opened, a data reading means for reading data from the map data storage means, A route guidance unit for processing the data of the opened road link and the scheduled road link in a different form to calculate an available road and perform route guidance of the vehicle; and A matching determining means for determining whether or not the actual traveling locus of the vehicle is map-matched; and changing the form of the scheduled road link to the form of the opened road link when the matching determining means determines that the map is matched. A form changing means for enabling the same processing as an opened road link, and a vehicle navigation system comprising: Device. 2. The apparatus according to claim 1, wherein the matching determining unit does not set the planned road link to be a target of map matching before the scheduled opening of the road link to be opened, and performs map matching after the scheduled opening date. A vehicular navigation device characterized by being an object. 3. The apparatus according to claim 2, wherein, if map matching has not been performed on a target road link to be opened after the scheduled date of opening, the route guidance unit sets the target road link to be opened. A vehicle navigation device characterized in that the use priority of a vehicle is lowered and the vehicle is not used for an initial guidance route. 4. The apparatus according to claim 3, wherein the route guidance section raises the use priority of the target road link to be opened when a re-search request is made for the searched initial guide route. A vehicle navigation device used for a guidance route. 5. The vehicle according to claim 4, further comprising a warning unit that indicates a possibility that the road link is different from an actual road configuration when a road link scheduled to be opened with a higher priority is used as a guide route. Navigation device.