JP2009288120A - Navigation system and navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To take peripheral facility information into a storage means automatically based on a present position, by mounting an external storage medium on an on-vehicle navigation. <P>SOLUTION: This navigation device is equipped with a display means 17, a present position detecting means 191 for detecting the present position; a display control means 16 for displaying peripheral information on the periphery of the present position on the display means 17 corresponding to the present position detected by the present position detection means 191; an external storage medium mounting part 20, on/from which the external storage medium 21 storing the peripheral information can be mounted/dismounted; a peripheral information extraction means 12 for extracting peripheral information, corresponding to the present position from the peripheral information stored in the external storage medium 21, and a peripheral information storage means 15 for storing the peripheral information extracted by the peripheral information extraction means 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an in-vehicle navigation system that displays a map image and a route image on a display screen, displays various facility information around the current position, or guides various facilities around the current position. Yes, especially when the storage capacity of the storage means for storing various facility information is limited, an external storage medium such as an SD card in which desired facility information is downloaded from various servers via the Internet and stored It is related with the navigation system and navigation apparatus which were mounted | worn with navigation of this, and were taken in and guide | indicated the said facility information in the predetermined area containing a present position according to the present position.

  In recent years, the performance of mobile communication terminal devices such as mobile phones and PHS has been dramatically improved, and multi-functionalization has been progressing. In particular, the data communication function is strengthened in addition to the call function, and various data communication services are provided to the user via the Internet. A navigation service is one of them, and recently, a navigation service that provides real-time route guidance from a current position to a destination for not only a driver of a car but also a mobile phone user has been realized.

  In these navigation systems and navigation devices, icon images indicating the types of facilities such as restaurants, various shops, fast food restaurants, supermarkets, etc. are displayed on the map images and guide route images displayed on the display means. It is displayed at the position, and further, detailed information regarding the facility is displayed, or the approach to the desired facility is guided. Generally, such facility information is fixedly provided in the navigation system and navigation device as a facility database collected in advance by a navigation system service provider and a navigation device manufacturer.

  In a navigation device having a communication function, it is possible to download such facility information from various servers via the Internet and store it in a database. There is also known a navigation device in which desired facility information is registered (input) by a user and stored in a database.

  The user designates the current position or a desired point, searches for a desired facility (a place of interest: POI) located around a specific point such as a work place or a transportation station, and details the desired facility. You can know the information. Such a navigation system is disclosed, for example, in the following Patent Document 1 (Japanese Patent Laid-Open No. 9-264750) as an invention of a navigation device.

  This navigation device performs the following processing. That is, facilities around the search point are selected by genre designation. The shortest straight distance between each selected facility and the route searched in advance is calculated. Only facilities whose calculated shortest straight distance is within 150 m are extracted. The left and right positions of each extracted facility with respect to the route traveling direction are detected. The distance to the destination along the guide route is determined at each facility. Each facility data is rearranged according to the obtained distance to the destination.

  The facility information includes information on various stores, for example, information on general facilities such as restaurants and hotels, as well as information on the location of an automatic speed control device called Orbis (registered trademark) installed on the road. is there. For example, the following Patent Document 2 (Japanese Patent Laid-Open No. 2000-20891) discloses an invention of a navigation device that acquires the installation position of an Orvis from information center distribution information.

  In this navigation device, information on the installation location (orvis position) of the automatic speed control device is included in various information transmitted from the communication device of the information center, and the electronic control device receives the information via the communication device. Based on the information on the orbis position, when the vehicle approaches the orbis position, warning guidance (caution guidance) is performed using a display device and a speaker, and the user is alerted.

The Orbis position is specified by the link number in the map and the distance from the start point (or end point) of the link, and if there is an Orbis position at a predetermined distance K before the vehicle on general roads and attachment roads, warning guidance will be given. On highways, city highways, and general toll roads, warning guidance is provided if there is an Orvis position a predetermined distance L from the vehicle. The predetermined distance L is set to a value larger than the predetermined distance K.
Japanese Patent Laid-Open No. 9-264750 JP 2000-20891 A

  The facility information acquired from the server or the like by the navigation device is stored in the storage means. When the current position of the navigation device is detected, the facility information around the current position and the route is read from the storage means and displayed on the display unit. Facility information is displayed on the map image, or when the current position approaches the facility, guidance is provided by voice output.

  However, since the storage capacity of the storage means provided in the navigation device is limited, facility information that cannot be stored in the storage means occurs. For example, since a relatively inexpensive navigation apparatus does not have a large storage capacity, there is an apparatus in which the number of facility information that can be stored is limited to about 300.

  In such a navigation device, when new facility information is downloaded via the network and added to the storage means, an operation of erasing the previously stored facility information and accumulating new facility information There was a problem that it was necessary.

  The inventor of the present application has conducted various studies to solve the above problems, and as a result, when the storage capacity of the storage means for storing various types of facility information is limited, the desired information is transmitted to various servers via the Internet. If an external storage medium such as an SD card downloaded and stored from the vehicle is mounted on the vehicle-mounted navigation and the facility information in a predetermined area including the current position is taken into the storage means according to the current position, the above-mentioned storage means The present invention has been completed by conceiving that problems can be solved.

  That is, the present invention has an object to solve the above problems, and an external storage medium such as an SD card in which desired information is downloaded and stored from various servers via the Internet is mounted on an in-vehicle navigation system, and the current position It is an object of the present invention to provide a navigation system that automatically captures peripheral facility information in a storage means based on the above.

  In order to solve the above-mentioned problem, the invention according to claim 1 of the present application includes a display means, a current position detection means for detecting a current position, and a position around the current position according to the current position detected by the current position detection means. And a display control unit that displays peripheral information on the display unit. The navigation device includes an external storage medium mounting unit to which an external storage medium storing peripheral information can be attached and detached, and an external storage medium. The display control comprises: peripheral information extracting means for extracting peripheral information corresponding to the current position from the stored peripheral information; and peripheral information storage means for storing peripheral information extracted by the peripheral information extracting means. The means displays the peripheral information stored in the peripheral information storage means on the display means.

  The invention according to claim 2 of the present application is the navigation device according to claim 1, wherein the navigation device sets in advance an extraction range in which the peripheral information extraction unit extracts peripheral information according to a current position. It is provided with.

  The invention according to claim 3 of the present application is the navigation device according to claim 2, wherein the extraction range set by the setting means is an area within a predetermined distance from the current position or divided into a plurality of mesh units. It is characterized by that.

  Further, in the invention according to claim 4 of the present application, in the navigation device according to claim 2 or claim 3, the peripheral information extracting means includes a plurality of peripheral information or mesh units existing within a predetermined distance from the current position. Peripheral information existing in the area currently located among the divided areas is extracted.

  The invention according to claim 5 of the present application is the invention according to claim 1, characterized in that the peripheral information stored in the external storage medium is facility information including orbis information.

  According to a sixth aspect of the present invention, the display means, the current position detecting means for detecting the current position, and the display means for displaying peripheral information around the current position according to the current position detected by the current position detecting means. In the navigation system provided with the navigation device including the display control means for displaying the navigation device, the navigation device is stored in the external storage medium and the external storage medium mounting unit to which the external storage medium storing the peripheral information can be attached and detached. Peripheral information extracting means for extracting peripheral information corresponding to the current position from the peripheral information, and peripheral information storage means for storing the peripheral information extracted by the peripheral information extracting means, wherein the navigation system includes a network A terminal device that acquires the peripheral information from the server via an external storage medium and stores the peripheral information in an external storage medium. Peripheral information stored in the peripheral information storage means and displaying on said display means.

  The invention according to claim 7 of the present application is the navigation system according to claim 6, wherein the navigation system sets in advance an extraction range in which the peripheral information extraction unit extracts peripheral information according to a current position. It is provided with.

  The invention according to claim 8 of the present application is the navigation system according to claim 7, wherein the extraction range set by the setting means is a predetermined distance from the current position or an area divided into a plurality of mesh units. It is characterized by.

  The invention according to claim 9 of the present application is the navigation system according to claim 7 or claim 8, wherein the peripheral information extracting means is divided into a plurality of peripheral information or mesh units existing within a predetermined distance from the current position. The peripheral information existing in the area where the current position is located is extracted.

  According to a tenth aspect of the present invention, in the navigation system according to the sixth aspect, the server is a server that provides facility information including the orbit information, and the peripheral information stored in the external storage medium is the orbit. It is facility information including information.

  In the invention according to claim 1, the navigation device displays the peripheral information around the current position according to the current position detected by the display means, the current position detecting means for detecting the current position, and the current position detecting means. Display control means for displaying on the navigation device, wherein the navigation device includes an external storage medium mounting unit to which an external storage medium storing peripheral information is detachable, and peripheral information stored in the external storage medium Peripheral information extracting means for extracting peripheral information corresponding to the current position from the above, and peripheral information storage means for storing peripheral information extracted by the peripheral information extracting means, wherein the display control means includes the peripheral information The peripheral information stored in the information storage means is displayed on the display means.

  According to such a configuration, desired peripheral information can be stored in the external storage medium, necessary peripheral information can be taken into the navigation device according to the current position, and displayed on the display means according to the situation. Even when the capacity is limited, the storage means can be used effectively. In addition, since the peripheral information can be automatically taken from the external storage medium, the operability can be improved.

  According to a second aspect of the present invention, in the navigation device according to the first aspect, the navigation device further comprises setting means for presetting an extraction range in which the peripheral information extracting means extracts peripheral information according to a current position. In the invention according to claim 3, in the navigation device according to claim 2, the extraction range set by the setting means is an area within a predetermined distance from the current position or divided into a plurality of mesh units.

  According to such a configuration, by providing the setting means, it is possible to determine in advance the extraction range of the peripheral information extracted by the peripheral information extraction means.

  Further, in the invention according to claim 4, in the navigation device according to claim 2 or claim 3, the peripheral information extracting means is divided into a plurality of pieces of peripheral information or mesh units existing within a predetermined distance from the current position. The peripheral information existing in the currently located area is extracted.

  According to this configuration, it is possible to capture peripheral information according to the storage capacity of the storage unit.

  According to a fifth aspect of the present invention, in the navigation device according to the first aspect, the peripheral information stored in the external storage medium is facility information including orbis information.

  According to such a configuration, the facility information including the orvis information can be stored in the external storage medium and can be easily taken into the navigation device.

  In the navigation system according to claim 6, display means, current position detection means for detecting a current position, and peripheral information around the current position according to the current position detected by the current position detection means. In the navigation system provided with the navigation device including the display control means for displaying the navigation device, the navigation device is stored in the external storage medium and the external storage medium mounting unit to which the external storage medium storing the peripheral information can be attached and detached. Peripheral information extracting means for extracting peripheral information corresponding to the current position from the peripheral information, and peripheral information storage means for storing the peripheral information extracted by the peripheral information extracting means, wherein the navigation system includes a network A terminal device that obtains the peripheral information from the server via the network and stores it in an external storage medium. Display control means displays peripheral information stored in said peripheral data storage means on the display means.

  According to such a configuration, the user of the navigation device collects peripheral information from a desired server using a terminal device such as a personal computer, stores it in the external storage medium, attaches the external storage medium to the navigation device, The peripheral information stored in the external storage medium can be easily taken into the navigation device and displayed on the display means according to the situation.

  Further, in the navigation system according to claim 7, in the navigation system according to claim 6, the navigation system sets in advance an extraction range in which the peripheral information extraction unit extracts peripheral information according to a current position. In the navigation system according to claim 8, in the navigation system according to claim 7, the extraction range set by the setting means is an area divided into a plurality within a predetermined distance from the current position or in mesh units It is.

  According to such a configuration, by providing the setting means, it is possible to determine in advance the extraction range of the peripheral information extracted by the peripheral information extraction means.

  Further, in the navigation system according to claim 9, in the navigation system according to claim 7 or claim 8, the peripheral information extracting means is divided into a plurality of pieces of peripheral information or mesh units existing within a predetermined distance from the current position. The surrounding information existing in the area where the current position is located is extracted.

  According to this configuration, it is possible to capture peripheral information according to the storage capacity of the storage unit.

  In the invention according to claim 10, in the navigation system according to claim 6, the server is a server that provides facility information including orbit information, and the peripheral information stored in the external storage medium includes orbis information. It is facility information.

  According to such a configuration, the facility information including the orvis information can be stored in the external storage medium and can be easily taken into the navigation system.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiments described below illustrate a navigation system and a navigation device for embodying the technical idea of the present invention, and are intended to specify the present invention as the navigation system and the navigation device. However, the present invention is equally applicable to the navigation system and navigation device of other embodiments included in the scope of claims.

  FIG. 1 is a diagram showing a configuration of a navigation system according to an embodiment of the present invention. As shown in FIG. 1, a navigation system according to an embodiment of the present invention includes a navigation device 1 capable of communicating with a server 3 via a communication network such as the Internet 2, and a server 3 via a communication network such as the Internet 2. And a terminal device 4 such as a personal computer capable of communication. The navigation device 1 is a vehicle-mounted navigation device 1, but may be a portable navigation device 1 that can be removed from a vehicle and installed in another vehicle, or used at home.

  The terminal device 4 includes a slot in which an external storage medium 21 such as an SD card is mounted, and can record various information downloaded from the server 3 on the external storage medium 21. Further, the external storage medium 21 can be attached to the navigation device 1 and various information recorded in the external storage medium 21 can be taken into the navigation device 1. In the navigation system of the present invention, when information is taken into the navigation device 1 from the external storage medium 21, information related to a predetermined area around the current position is extracted based on the current position of the navigation device 1, and the navigation device is extracted. 1 can be stored.

  FIG. 2 is a block diagram showing a configuration of the navigation device 1 according to the embodiment of the present invention. The navigation device 1 includes a control unit 10 having a ROM 101 and a RAM 102, a map storage unit 11, a peripheral information extraction unit 12, an area setting unit 13, an area determination unit 14, a peripheral information storage unit 15, a display control unit 16, a display unit 17, The navigation unit 19 includes an operation unit 18, a current position detection unit 191, a route search unit 192, an external storage medium mounting unit 20, and the like. The external recording medium mounting unit 20 can read data by mounting an external recording medium 21 such as an SD card. The display unit 17 may be provided with a touch panel, and various operations and settings of the navigation device 1 may be performed by a touch operation.

  The control means 10 is constituted by a processor and has a ROM 101 and a RAM 102, and controls the operation of each part of the navigation device 1 according to a control program recorded in the ROM 101.

  The navigation unit 19 includes a current position detection unit 191 and a route search unit 192, and is a part that executes a navigation function.

  The current position detection means 191 is composed of, for example, a GPS receiver and receives radio waves including time information from a plurality of GPS satellites orbiting the earth, and calculates current position information based on the received radio waves. It is.

  Furthermore, the current position detection means 191 may be used in combination with a self-contained navigation means including a steering angle sensor, an acceleration sensor, a distance sensor, a direction sensor, and the like. In this case, the travel distance and travel direction of the vehicle are detected, and the current position is obtained by adding these values to the reference position. This current position detection method, when combined with GPS reception, is effective in tunnels where GPS radio waves cannot be received or in high-rise buildings where errors are likely to occur.

  The map storage means 11 stores road node data including road node data and road link data in which nodes such as intersections and branch points of each road are nodes and links between the nodes are links. The road node data includes road node numbers, position coordinates, the number of connection links, intersection names, and the like. The road link data includes the number of road nodes as starting and ending points, road type, link length (link cost), required time, number of lanes, road width, and the like. Further, data such as bridges, tunnels, railroad crossings, and toll gates are added to the road link data as link attributes. The road type is information including a distinction between an expressway and a toll road and a distinction such as a national road or a prefectural road.

  The road data includes the location information of a specific area such as a parking area and a service area provided on each expressway in the expressway, the entry path to the specific area, and the exit path from the specific area for each specific area. Contains information. The road data includes attribute information such as road types such as highways, national roads, prefectural roads, municipal roads, road widths, and the number of lanes, and is stored as map data according to the traveling direction of up and down.

  The map storage means 11 further stores background data including facility data including water system data such as coastline, lake, and river shape, administrative boundary data, facility location, shape, and name.

  Further, the map storage means 11 may include map image data stored in a vector format in order to display the map image in an easy-to-see manner, in addition to road data and background data.

  When the navigation device 1 is used, the road data, background data, and map image data are extracted from the map storage means 11 in a predetermined range including the current position of the navigation device 1, and a current position mark indicating the current position. And the guide route image are superimposed and displayed on the display means 17.

  When displaying a map on the display means 17 and specifying a desired position (point) on the map image using the touch panel function to set a destination or waypoint, a point input mode using the touch panel from the operation means 18 is set. Select and display a map image containing the point you want to set. In order to display a map image including a desired point, the map may be scrolled using a scroll cursor, or a facility that becomes a nearby landmark may be searched and a map image including the location may be displayed.

  Similarly, when a map image including a desired place is displayed on the display means 17 and the position of the desired facility is confirmed, the desired facility is designated from the operation means 18 and a map image including a point where the facility is located is included. Is displayed. That is, to display a map image including the location where the desired facility is located, scroll the map using the scroll cursor, or search for a facility that becomes a nearby landmark and display the map image including that location. You can do it.

  Major facility data such as public facilities, railway stations, hospitals, post offices, and banks are included in the map data, and each facility is displayed as an icon on the map image. Various peripheral information such as facility information collected and registered by the user of the navigation device 1 from a server or the like is stored in the peripheral information storage means 15 and read from the peripheral information storage means 15 by the display control means 16 as necessary. And displayed on the map image displayed on the display means 17.

  When a user collects desired peripheral information, the communication function of the navigation device 1 is used to connect to the server 3 shown in FIG. 1 to perform a network search to set a desired search condition and download a search result. Can be stored in the peripheral information storage means 15. The user of the navigation device 1 uses the terminal device 4 (see FIG. 1) such as a personal computer held at home or the like to access various information providing servers and information search sites. It can also be downloaded from the web page provided.

  In the present invention, the peripheral information in which the desired peripheral information is stored in the external storage medium 21 such as an SD card in this way can be used by attaching the external storage medium 21 to the navigation device 1. At that time, since the storage capacity of the peripheral information storage means 15 of the navigation device 1 is limited, when new peripheral information is taken into the peripheral information storage means 15 from the external storage medium 21, it is within a certain area according to the current position. The navigation apparatus 1 is configured so as to capture peripheral information such as the facility where it is located. In this way, only peripheral information such as facilities located in an area of a required size based on the current position can be taken into the navigation device 1 from the external storage medium 21, and the peripheral information storage means 15 Even if the storage capacity is limited, the peripheral information storage means 15 can be used effectively.

  Accordingly, the user of the navigation device 1 collects peripheral information from the desired server 3 using the terminal device 4 such as a personal computer, stores it in the external storage medium 21, and attaches the external storage medium 21 to the navigation device 1. Then, the peripheral information stored in the external storage medium 21 can be easily taken into the navigation device 1.

  The peripheral information stored in the external storage medium 21 and taken into the navigation device 1 is, for example, orbis information related to the installation location of the orvis (automatic speed control device), and FIG. 3 shows an example of the data configuration. This data consists of the latitude / longitude of the installation location of Orbis (automatic speed control device), the name of the installation location, the ascending / descending direction of the installed road, the method of the installed device, the road type, etc. . From FIG. 3, it can be seen that the Orbis (automatic speed control device) installed at latitude X1 and longitude Y1 is installed on the toll road in the upward direction of ## IC (interchange) and is a loop coil type device.

  FIG. 4 is a diagram illustrating an example of a configuration of data regarding a restaurant which is another example of peripheral information. As shown in FIG. 4, restaurant information collected through a search site is classified into categories such as French, Italian, Chinese, etc., and each restaurant's location (latitude, longitude), address, telephone number, homepage URL, sales guide, etc. Other data is accumulated.

  An external storage medium 21 such as an SD card storing peripheral information (see FIG. 3 and FIG. 4) is mounted on the external storage medium mounting unit 20 of the navigation apparatus 1 and the information stored in the medium is taken into the navigation apparatus 1. At that time, instead of taking in all the peripheral information stored in the external storage medium 21, an area of a predetermined fixed size is discriminated based on the information of the current position detected by the current position detecting means 191. The peripheral information such as the facility located in the area is read from the external storage medium 21 and is taken into the peripheral information storage means 15 of the navigation device 1.

  The area setting means 13 is for presetting an area when the peripheral information stored in the external storage medium 21 is taken in, and the size of the area can be set by various methods.

  For example, a radius of 0.00 km or the like with the current position as the center may be determined in advance, or a rectangular area having a diagonal length of 0.00 km with the latitude and longitude of the current position as the center may be used. The setting can be performed by inputting a desired value or selecting from a menu. In addition, the navigation may automatically convert the above values according to the scale of the map displayed on the display means 17. Moreover, you may make it set as numerical values, such as 1 mesh part for a map mesh, or 9 mesh part. Any one of the above may be set as a default value of the navigation device so that it can be changed.

  In this way, an appropriate area size can be set according to the storage capacity of the storage means for storing the peripheral information, and the peripheral information can be taken in according to the storage capacity of the storage means.

  The area discriminating unit 14 discriminates a range in which peripheral information stored in the external storage medium 21 is extracted, and specifies a predetermined range area including the current position. For example, a rectangular area having a radius of 0.00 km centered on the current position or a diagonal length of 0.00 km centered on the latitude / longitude of the current position is specified. In identifying this area, the area discriminating unit 14 can use information on the size of the area set by the area setting unit 13.

  That is, the area discriminating unit 14 discriminates an area centered on the current position based on the size of the area set in the area setting unit 13 and the position information detected by the current position detecting unit 191.

  The peripheral information extraction unit 12 uses the peripheral information stored in the external storage medium 21 based on the determination information such as the size of the area determined by the area determination unit 14 and the peripheral information such as information on the facility located in the area. Is extracted and stored in the peripheral information storage means 15.

  When route guidance, map display, or facility display is started in the navigation device 1, as described above, a required map image or route image is displayed on the display means 17 based on the current position. Further, the display control means 16 reads the peripheral information from the peripheral information storage means 15 and displays the peripheral image on the map image displayed on the display means 17. Further, the navigation device 1 outputs voice guidance according to the current position together with the image displayed on the display means 17 from a speaker (not shown).

  For example, if an Orbis (automatic speed control device) is installed in front of the road you are driving, just before the installation point (before a predetermined distance) Voice guidance or guidance display such as “Please do” is displayed.

  Next, the operation procedure of the navigation system and the navigation apparatus 1 according to the embodiment of the present invention will be described based on the flowcharts shown in FIGS. FIG. 5 is a flowchart showing a procedure for searching and storing desired peripheral information in the external storage medium 21, and FIG. 6 shows an operation procedure of the navigation device 1 when the external storage medium 21 is mounted on the navigation device 1 and used. It is a flowchart.

  When storing the peripheral information in the external storage medium 21, the user uses the terminal device 4 such as a personal computer owned by the user and connects to the server 3 via the network 2 in the process of step S101 as shown in the flowchart of FIG. Alternatively, it connects to a search site or the like (see FIG. 1), sets a search condition for searching for desired facility information, and transmits it to the server 3 or the search site.

  When the search for the peripheral information that matches the search condition at the server 3 or the search site is completed, the terminal device 4 receives the search result from the server 3 in the process of step S102, or the search site web page (search response information). And whether or not there has been an instruction to select peripheral information to be stored in the external storage medium 21 in the process of step S103. When there is a selection instruction, the terminal device 4 stores the peripheral information in the external storage medium 21 in the process of step S104. If there is no selection instruction, the process proceeds to step S105.

  When the storage of the peripheral information in the external storage medium 21 is completed in the process of step S104, the process proceeds to the determination process of step S105, and it is determined whether or not there is an instruction to end the operation such as search. If there is an operation end instruction, the terminal device 4 ends the process. If it is determined that there is no operation end instruction, the process returns to step S103.

  In this way, the external storage medium 21 storing the peripheral information by the terminal device 4 can be attached to the navigation device 1 and the stored peripheral information can be used. In the process of the navigation device 1 in that case, as shown in the flowchart of FIG. 6, it is determined whether or not the external storage medium 21 is attached to the external storage medium attachment unit 20 in the process of step S201.

  If it is determined that the external storage medium 21 is not attached, the process proceeds to step S211 to determine whether or not an instruction to end the operation of the navigation device 1 in this operation mode (operation mode using the external storage medium 21) is given. Is determined. If the operation ends, the navigation device 1 ends the process.

  If it is determined that the external storage medium 21 is attached, the current position information detected by the current position detecting unit 191 is acquired in the process of step S202. Next, in step S203, the area determination unit 14 determines an area centered on the current position based on the size of the area set by the area setting unit 13 and the position information detected by the current position detection unit 191. In the process of step S204, the peripheral information extracting unit 12 selects the facility located in the determined area among the peripheral information stored in the external storage medium 21 based on the area information determined by the area determining unit 14. Identify and extract facility information (peripheral information) in the area. Then, the extracted peripheral information is stored in the peripheral information storage means 15 in the process of step S205.

  Next, the navigation device 1 performs current position detection and current position update processing in step S206. In step S207, it is determined whether or not the navigation apparatus 1 has entered a new area. If the navigation apparatus 1 has not entered the new area, the process returns to step S206. The area determination unit 14 determines an area centered on the current position based on the size of the area set in the area setting unit 13 and the position information detected by the current position detection unit 191.

  When the area is determined, in the process of step S209, the peripheral information extracting unit 12 determines, among the peripheral information stored in the external storage medium 21, based on the new area information determined by the area determining unit 14. The facility located in the designated area is specified, and the facility information (surrounding information) in the area is extracted.

  When the peripheral information in the new area is extracted, the process proceeds to step S210, and the navigation device 1 automatically deletes the old peripheral information (peripheral information of the old area) stored in the peripheral information storage unit 15, and the process in step S209. The peripheral information in the new area extracted in the process is stored in the peripheral information storage means 15.

  In this way, when storing new peripheral information in the storage means as in the prior art, the peripheral information required according to the current position is compared with deleting old information and storing new peripheral information. Can be taken into the navigation device 1, and the storage means can be used effectively even when the capacity of the storage means is limited. In addition, since the peripheral information can be automatically taken from the external storage medium, the operability can be improved.

1 is a system configuration diagram showing a configuration of a navigation system according to an embodiment of the present invention. It is a block diagram which shows the structure of the navigation apparatus concerning the Example of this invention. It is a figure which shows an example of the data structure of the Orbis information taken in from an external storage medium as peripheral information. It is a figure which shows an example of the data structure of the facility (restaurant) information taken in from an external storage medium as peripheral information. A flowchart showing a procedure for searching and storing desired peripheral information in an external storage medium It is a flowchart which shows the operation | movement procedure of a navigation apparatus at the time of mounting | wearing and using an external storage medium for a navigation apparatus.

Explanation of symbols

1: Navigation device 10: Control means 101: ROM
102: RAM
11: Map storage means 12: Peripheral information extraction means 13: Area setting means 14: Area discrimination means 15: Peripheral information storage means 16: Display control means 17: Display means 18: Operation means 19: Navigation means 191: Current position detection means 192: Route search means 20: External storage medium mounting unit 21: External storage medium

Claims (10)

Display means;
Current position detecting means for detecting the current position;
A display control means for displaying peripheral information around the current position on the display means according to the current position detected by the current position detection means;
The navigation device includes an external storage medium mounting unit to which an external storage medium storing peripheral information is detachable;
Peripheral information extracting means for extracting peripheral information according to the current position from the peripheral information stored in the external storage medium;
Peripheral information storage means for storing the peripheral information extracted by the peripheral information extraction means,
The navigation apparatus according to claim 1, wherein the display control means displays the peripheral information stored in the peripheral information storage means on the display means.   The navigation apparatus according to claim 1, further comprising a setting unit that presets an extraction range in which the peripheral information extracting unit extracts peripheral information according to a current position.   The navigation device according to claim 2, wherein the extraction range set by the setting means is an area within a predetermined distance from the current position or divided into a plurality of mesh units.   The peripheral information extracting means is present in an area where the current position is located among peripheral information existing within a predetermined distance from the current position or an area divided into a plurality of mesh units based on the extraction range set by the setting means. 4. The navigation device according to claim 2, wherein peripheral information is extracted.   2. The navigation apparatus according to claim 1, wherein the peripheral information stored in the external storage medium is facility information including orbis information. Display means;
Current position detecting means for detecting the current position;
In a navigation system comprising a navigation device comprising display control means for displaying peripheral information around the current position on the display means according to the current position detected by the current position detection means,
The navigation device includes an external storage medium mounting unit to which an external storage medium storing peripheral information is detachable, and peripheral information extraction that extracts peripheral information according to a current position from peripheral information stored in the external storage medium Means, and peripheral information storage means for storing the peripheral information extracted by the peripheral information extraction means,
The navigation system includes a terminal device that acquires the peripheral information from a server via a network and stores it in an external storage medium,
The navigation system according to claim 1, wherein the display control means displays the peripheral information stored in the peripheral information storage means on the display means.   The navigation system according to claim 6, further comprising a setting unit that presets an extraction range in which the peripheral information extracting unit extracts peripheral information according to a current position.   The navigation system according to claim 7, wherein the extraction range set by the setting means is an area within a predetermined distance from the current position or divided into a plurality of mesh units.   The peripheral information extracting means is present in an area where the current position is located among peripheral information existing within a predetermined distance from the current position or an area divided into a plurality of mesh units based on the extraction range set by the setting means. The navigation system according to claim 7 or 8, wherein peripheral information is extracted.   The navigation system according to claim 6, wherein the server is a server that provides facility information including orbis information, and the peripheral information stored in the external storage medium is facility information including orbis information.

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