JP2013044707A - Navigation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation apparatus that can appropriately present a user with the direction of the sea when a tsunami alarm is issued.SOLUTION: A navigation apparatus comprises: a map information storage unit that stores map information; a marine information table storage unit that divides the map information into a plurality of areas and stores the direction of the sea that each of the areas faces as a marine information table; a current position detector that detects a current position of a vehicle; an area identifier that identifies the area including the detected current position on the basis of the map information; a sea direction extractor that extracts the direction of the sea that the identified area faces on the basis of the marine information table; a tsunami information receiver that receives tsunami information; and a display unit that displays the extracted direction of the sea when the tsunami information is received.

Description

  The present invention relates to a navigation device, and more particularly to a navigation device that provides information about the sea to a user.

  2. Description of the Related Art Vehicle navigation devices that notify a user of the current position of a vehicle together with map information and assist driving are widely used.

  Such a navigation device normally displays the current position of the vehicle at the center of the display screen, and sequentially displays the map information display range as the vehicle moves. Therefore, when the user wants to know information on a region that is not displayed on the display screen, the user needs to scroll the display screen or change the magnification of the display screen for confirmation. In particular, when a tsunami warning associated with the occurrence of an earthquake is issued, it is necessary to confirm the direction of the sea relative to the current position on the display screen and to evacuate quickly away from the sea.

  However, in order to confirm the direction of the sea, the operation of scrolling the display screen or changing the magnification is not only complicated, but if the current position of the vehicle deviates from the display screen, the current position is lost. There is a risk that.

  As a prior art capable of providing information about the sea to the user, in the following Patent Document 1 (Japanese Patent Laid-Open No. 2003-337044), based on a current position and a database of position information, the current position of the vehicle is a place along the sea. There is disclosed a vehicular navigation device configured to determine whether or not there is, and to notify a sound reminiscent of a place along the sea when it is along the sea.

  In Patent Document 2 (Japanese Patent Laid-Open No. 2004-163152) below, it is determined whether or not the destination is near the sea, and if the destination is near the sea, information on the sea near the destination is acquired. A vehicular navigation device configured as described above is disclosed.

  Furthermore, in the following Patent Document 3 (Japanese Patent Application Laid-Open No. 2007-271299), road map data includes landscape attribute information in which each link includes a road along the sea, and the vehicle approaches a branch point that includes landscape attribute information. In this case, a vehicular navigation device configured to guide a user to another selected route including landscape attribute information separately from the optimum route is disclosed.

JP 2003-337044 A (paragraph [0047]) Japanese Patent Laying-Open No. 2004-163152 (Claim 2) JP 2007-271299 A (Claims 1 and 3)

  However, in the case of the above-described Patent Document 1, when the vehicle is not traveling along the sea, it is necessary to scroll and confirm the display screen in order to determine the direction of the sea. Moreover, said patent document 2 provides the information regarding the sea when the destination is near the sea, and does not present the direction of the sea with respect to the current position to the user. Further, Patent Document 3 described above guides a user on a selected route including a road along the sea, and does not present the direction of the sea with respect to the current position to the user, as in Patent Document 2. Therefore, none of the above prior arts can appropriately present the direction to be evacuated to the user when a tsunami warning is issued.

  An object of the present invention is to provide a navigation device capable of appropriately presenting the direction of the sea to a user when a tsunami warning is issued. It is what.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is
A map information storage unit for storing map information, a sea information table storage unit for dividing the map information into a plurality of areas, and storing the direction of the sea facing each area as a sea information table; A current position detection unit for detecting a position; an area specifying unit for specifying the area including the detected current position based on the map information; and the area specified based on the sea information table. A sea direction extracting unit that extracts the direction of the sea, a tsunami information receiving unit that receives tsunami information, and a display unit that displays the extracted sea direction when the tsunami information is received. It is characterized by that.

  The invention according to claim 2 of the present application is the navigation device according to claim 1, wherein the sea direction extraction unit is the first to start from the current position when the specified area faces a plurality of sea directions. It is characterized by extracting the direction of the sea that is close.

  The invention according to claim 3 of the present application is the navigation device according to claim 2, wherein the map information includes sea area information, and the sea direction extraction unit indicates a direction in which the sea area information closest to the current position is present. It extracts as the said sea direction, It is characterized by the above-mentioned.

  The invention according to claim 4 of the present application is the navigation device according to claim 2, wherein the map information includes road information in which coastline information is set, and the sea direction extraction unit is closest to the current position. A direction with the road information in which coastline information is set is extracted as the sea direction.

  The invention according to claim 5 of the present application is the navigation device according to any one of claims 1 to 4, wherein the area is divided into prefectures.

  The invention according to claim 6 of the present application is the navigation device according to any one of claims 1 to 4, wherein the area is divided into topographic maps of predetermined sections.

  The invention according to claim 7 of the present application is the navigation device according to any one of claims 1 to 6, wherein the display unit performs north-up display for displaying a map with north as an upper side. .

  The invention according to claim 8 of the present application is the navigation device according to any one of claims 1 to 6, wherein the display unit performs a heading-up display for displaying a map with the traveling direction of the vehicle up. Features.

In the invention according to claim 1,
A map information storage unit for storing map information, a sea information table storage unit for dividing the map information into a plurality of areas, and storing the direction of the sea facing each area as a sea information table; A current position detection unit for detecting a position; an area specifying unit for specifying the area including the detected current position based on the map information; and the area specified based on the sea information table. A sea direction extracting unit that extracts the direction of the sea, a tsunami information receiving unit that receives tsunami information, and a display unit that displays the extracted sea direction when the tsunami information is received.

  By configuring in this way, when the tsunami information is received, the area including the current position is specified, and by extracting and displaying the direction of the sea that the area faces from the sea information table, the user can The direction of the sea can be properly grasped without scrolling the display screen and searching for the sea. Further, since there is no need to scroll the display screen, it is possible to correctly recognize the direction of the sea relative to the current position of the vehicle and to evacuate in an appropriate direction with certainty.

  In the invention according to claim 2, in the navigation device according to claim 1, when the specified area faces a plurality of sea directions, the direction of the sea closest to the current position is extracted and displayed. Thus, the user can evacuate in an appropriate direction.

  In the invention which concerns on Claim 3, in the navigation apparatus which concerns on Claim 2, when the specified area faces the direction of several seas, it is the nearest from the present position based on the sea area information contained in map information The direction of the sea can be extracted.

  In the invention which concerns on Claim 4, in the navigation apparatus which concerns on Claim 2, when the specified area faces the direction of several seas, based on the road information to which the coastline information contained in map information was set The direction of the sea closest to the current position can be extracted.

  In the invention which concerns on Claim 5, in the navigation apparatus which concerns on any one of Claims 1-4, an area can be divided | segmented into a prefecture.

  In the invention which concerns on Claim 6, in the navigation apparatus which concerns on any one of Claims 1-4, an area can be divided | segmented into the topographic map of a predetermined division.

  In the invention which concerns on Claim 7, in the navigation apparatus which concerns on any one of Claims 1-6, a user changes the advancing direction of a vehicle by performing the north-up display which displays the map which makes north the top Even so, the map does not rotate and the traveling direction can be easily recognized.

  In the invention according to claim 8, in the navigation device according to any one of claims 1 to 6, the actual road and the map are displayed by performing a heading-up display that displays a map with the traveling direction of the vehicle up. It becomes easy to recognize the correspondence with the upper road.

1 is a configuration block diagram of a navigation device in an embodiment of the present invention. It is explanatory drawing of the sea information table memorize | stored in the sea information table memory | storage part shown in the block diagram of FIG. It is an operation | movement flowchart of the navigation apparatus in the Example of this invention. It is explanatory drawing of the north up display screen displayed on the display part shown in the block diagram of FIG. It is explanatory drawing of the heading-up display screen displayed on the display part shown in the block diagram of FIG.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiment described below exemplifies a vehicle navigation device for embodying the technical idea of the present invention, and is not intended to specify the present invention as this vehicle navigation device. However, the present invention can be equally applied to the navigation devices of other embodiments included in the scope of claims.

  FIG. 1 is a block diagram showing a configuration of a vehicle navigation apparatus 10 according to an embodiment of the present invention.

  The vehicle navigation device 10 includes a control unit 11, a current position detection unit 12, a route search unit 13, a map information storage unit 14, a sea information table storage unit 15, an area identification unit 16, a sea direction extraction unit 17, and a reception unit 18 ( A tsunami information receiving unit), an operation unit 19, a display unit 20, and a speaker 21.

  The control unit 11 includes a CPU 22, a RAM 23, and a ROM 24. The CPU 22 executes a control program stored in the RAM 23 and / or the ROM 24, thereby controlling and supervising the operation of each unit of the vehicle navigation device 10 described below. .

  The current position detector 12 receives radio waves (satellite signals) including time information from a plurality of GPS satellites orbiting the earth at predetermined time intervals, and calculates the current position of the vehicle based on the received satellite signals. To do. The current position detection unit 12 may be configured by an autonomous navigation means that calculates the current position of the vehicle based on acceleration or angular velocity acquired from an acceleration sensor, a gyro sensor, or the like, or a radio wave transmitted from a base station. it can.

  The route search unit 13 includes the map information stored in the map information storage unit 14, the current position of the vehicle calculated by the current position detection unit 12 or the departure point set using the operation unit 19, and the destination. Based on this, the optimum travel route from the current position or starting point to the destination is searched. The route search unit 13 searches for a link from the node of the road corresponding to the current position or the starting point to the node corresponding to the destination by a method such as the Dijkstra method, and calculates the link length (link cost) and required time. The route that accumulates and has the shortest total link length (travel distance) or total required time is searched for as a travel route.

  The map information storage unit 14 stores map information including area information indicating areas by prefecture, road data for searching for a moving route of vehicles, building data, background data, and text data. The map information may be acquired from an external map information providing server (not shown) and stored in the map information storage unit 14 as the latest map information.

  The road data is composed of node data in which roads are nodes such as inflection points and branch points, and link data in which routes connecting the respective nodes are links. The node data includes node attributes such as node numbers, node position coordinates (latitude / longitude), intersection information and information indicating intersection names, and the number of connection links and connection link numbers.

  Link data includes node numbers that are the start and end points of links, road types for distinguishing expressways, ordinary roads, streets, etc., distances and / or required times between nodes, and road names such as national highways. It is comprised including. In addition to the above, data such as bridges, tunnels, railroad crossings, toll booths, parking lots, etc. are added to the link data. The building data includes position coordinates (latitude / longitude) composed of at least three points of the building, types of buildings such as buildings and private houses, and display color data. In addition, the background data is configured to include data of position coordinates (latitude / longitude) including at least three points serving as background image information such as a sea area (sea area information), a lake, a river shape, and a forest, and display color. The text data includes characters (names) such as place names and river names, and data of their coordinates (latitude / longitude).

  As shown in FIG. 2, the sea information table storage unit 15 uses a relationship between the area for each prefecture stored in the map information storage unit 14 and the direction of the sea facing each area as a sea information table 25. Remember. For example, in Iwate Prefecture, since the east direction faces the sea, information on the direction indicating “east” is set as the sea direction. In Hokkaido, four directions of north, east, south, and west face the sea, so information on four directions of “north, east, south, and west” is set as the direction of the sea. Further, since Nagano Prefecture does not face the sea, “None” information is set as the sea direction.

  The area specifying unit 16 specifies the area of the current position based on the current position of the vehicle detected by the current position detecting unit 12 and the area information indicating the area for each prefecture stored in the map information storage unit 14. To do.

  The sea direction extracting unit 17 extracts the direction of the sea facing the area including the current position of the vehicle specified by the area specifying unit 16 based on the sea information table 25. If a plurality of sea directions are set for the specified area, the sea direction closest to the current position is extracted.

  The receiving unit 18 receives a tsunami warning from the external information providing server 26.

  The operation unit 19 is used for inputting various information to the vehicle navigation device 10 such as starting and destination for route search, enlargement / reduction of map image, scrolling, registration of desired landmarks, and the like. Is.

  The display unit 20 displays various menu screens, the current position and map image of the vehicle, the searched travel route, and the like, and also displays the direction of the sea relative to the current position when a tsunami warning is received from the information providing server 26. .

  The speaker 21 outputs necessary guidance voice to the user.

  The operation unit 19 can also be configured by a touch panel formed on the display unit 20.

  The vehicle navigation device 10 of the present embodiment is basically configured as described above.

  Next, the operation of the vehicle navigation apparatus 10 will be described according to the flowchart shown in FIG.

  When the power of the vehicle navigation device 10 is turned on, the current position detection unit 12 receives a satellite signal from a GPS satellite and detects the current position of the vehicle (step S101). The detected current position is displayed on the display unit 20 together with the map information centered on the current position read from the map information storage unit 14 by the control unit 11.

  Here, when the user inputs a departure point and a destination via the operation unit 19 to instruct a route search, the route search unit 13 starts from the departure point based on the map information stored in the map information storage unit 14. Search for the optimal travel route to the destination. The searched movement route is displayed on the display unit 20 together with the map information. Next, when the user travels the vehicle according to the displayed travel route, the current position detection unit 12 sequentially detects the current position of the vehicle, and the control unit 11 together with the travel route searched for on the display unit 20 Display the position.

  On the other hand, when an earthquake occurs while the vehicle navigation apparatus 10 is activated and the receiving unit 18 receives tsunami information from the information providing server 26 (step S102, YES), the area specifying unit 16 is based on the map information. The area (prefecture) including the current position of the vehicle is specified (step S103). When the area is specified, the sea direction extraction unit 17 extracts the direction of the sea facing the specified area based on the sea information table 25 stored in the sea information table storage unit 15 (step S104). ). For example, when the area including the current position of the vehicle is Tottori Prefecture, “north” is extracted as the sea direction.

  When the extracted sea direction is one (step S105, NO), the display unit 20 displays the map information centered on the current position, and displays the sea direction in a portion corresponding to the extracted sea direction. The area 28 (FIGS. 4 and 5) is displayed (step S107).

  In addition, when the area including the current position of the vehicle has a plurality of sea directions such as Hokkaido and Aomori Prefecture (step S105, YES), the area from the current position is the most based on the sea area information set in the map information. The direction having near sea area information is extracted as the sea direction (step S106). And the display part 20 displays the map information centering on a present position, and displays the sea direction area 28 (FIG. 4, FIG. 5) in the part corresponding to the direction of the extracted sea (step S107).

  FIG. 4 shows a display screen 29 on which the current position 27 and the sea direction area 28 of the vehicle are displayed by a north-up display that displays a map with north as the top. By performing the north-up display, even if the user changes the traveling direction of the vehicle, the map does not rotate and the traveling direction can be easily recognized. FIG. 5 shows a display screen 30 that displays the current position 27 of the vehicle and the sea direction area 28 by a heading-up display that displays a map with the traveling direction of the vehicle up. By performing the heading-up display, it becomes easier to recognize the correspondence between the actual road and the road on the map.

  The user can accurately determine the direction of the sea according to the display screen 29 or 30 on which the sea direction area 28 is displayed together with the current position 27 of the vehicle, without scrolling the display range of the map image or reducing the map to search the sea. Can grasp. And it can evacuate appropriately from a tsunami by moving in the direction away from the sea direction area 28 displayed. In addition, while displaying the sea direction area 28 on the display unit 20 and notifying the user of a tsunami warning from the speaker 21, evacuation can be recommended to the user.

  The above process is performed until the power of the vehicle navigation apparatus 10 is turned off (step S108). In addition, when not receiving tsunami information (step S102, NO), the normal display state which does not display the sea direction area 28 is maintained.

  In addition, this invention is not limited to the Example mentioned above, It can change in the range which does not deviate from the summary of this invention.

  For example, in the above-described embodiment, area information indicating areas by prefecture is stored in the map information storage unit 14, and the relationship between each area and the direction of the sea is used as the sea information table 25 and the sea information table storage unit 15 The state of the sea including the current position of the vehicle is specified and the sea direction is displayed. Instead, the map information storage unit 14 stores area information indicating the area of each predetermined section according to the topographic map (for example, the topographic map issued by the Geographical Survey Institute), and the relationship between each area and the direction of the sea. The sea information table 25 may be stored in the sea information table storage unit 15, and a predetermined section including the current position of the vehicle may be specified to display the sea direction.

  In the above-described embodiment, when a plurality of sea directions corresponding to an area are set, the direction of the sea area closest to the current position of the vehicle is extracted as the sea direction. Instead, the coastline information indicating that the road is along the sea is set in the road information, and the direction of the road with the coastline information closest to the current position of the vehicle is extracted as the sea direction. It may be.

  In the present embodiment, the navigation device is described as a vehicle navigation device. However, the present invention is not limited to this, and the navigation device for bicycles and motorcycles or the navigation device for pedestrians (portable) is also used. It can be adapted.

DESCRIPTION OF SYMBOLS 10 ... Vehicle navigation apparatus 11 ... Control part 12 ... Current position detection part 13 ... Path search part 14 ... Map information storage part 15 ... Sea information table storage part 16 ... Area specifying unit 17 ... sea direction extracting unit 18 ... receiving unit 19 ... operating unit 20 ... display unit 21 ... speaker 25 ... sea information table 26 ... information providing server 27 ..Current location 28 ... Sea direction area 29, 30 ... Display screen

Claims (8)

A map information storage unit for storing map information;
A sea information table storage unit that divides the map information into a plurality of areas, and stores the direction of the sea facing each area as a sea information table;
A current position detector for detecting the current position of the vehicle;
Based on the map information, an area specifying unit for specifying the area including the detected current position;
Based on the sea information table, a sea direction extraction unit that extracts the direction of the sea facing the identified area;
A tsunami information receiver for receiving tsunami information;
When the tsunami information is received, a display unit that displays the direction of the extracted sea;
A navigation device comprising:   The navigation according to claim 1, wherein the sea direction extraction unit extracts the sea direction closest to the current position when the specified area faces a plurality of sea directions. apparatus.   The navigation apparatus according to claim 2, wherein the map information includes sea area information, and the sea direction extraction unit extracts a direction having the sea area information closest to the current position as the sea direction.   The map information includes road information in which coastline information is set, and the sea direction extraction unit extracts a direction in which the road information in which the coastline information closest to the current position is set is present as the sea direction. The navigation device according to claim 2.   The navigation device according to claim 1, wherein the area is divided into prefectures.   The navigation device according to any one of claims 1 to 4, wherein the area is divided into topographic maps of predetermined sections.   The navigation device according to any one of claims 1 to 6, wherein the display unit performs a north-up display for displaying a map with north as an upper side.   The navigation device according to any one of claims 1 to 6, wherein the display unit performs a heading-up display that displays a map with a traveling direction of the vehicle up.

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