JP2012018041A - On-vehicle navigation device and method of providing information relating to earthquake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide "an on-vehicle navigation device and a method of providing information relating to earthquake" by which a positional relation between a vehicle and an earthquake occurrence point at the time of an occurrence of an earthquake can be grasped easily.SOLUTION: The on-vehicle navigation device comprises: storage means storing map data; own-vehicle position detection means for detecting a current position of its own vehicle; display means; earthquake information acquiring means for acquiring earthquake information including information about the position of the epicenter and the magnitude of an earthquake; and control means which, when the earthquake information is acquired, extracts the epicenter information from the earthquake information, adjusts the scale of a map in accordance with the distance between the positions of its own vehicle and the epicenter so that the positions of its own vehicle and the epicenter are included, generates a map image of which scale is adjusted, and displays it on a screen of the display means. The control means may adjust the scale of a map so that the position of its own vehicle is located at the center of the map image and the position of the epicenter is near the edge of the map image.

Description

  The present invention relates to an in-vehicle navigation device and a method for providing earthquake related information having a function capable of easily grasping a positional relationship between a vehicle and an earthquake occurrence point when an earthquake occurs.

  Conventional typical vehicle-mounted navigation devices include a control device such as a CPU that controls all processes related to navigation, a storage device such as a DVD (Digital Versatile Disk) -ROM or an IC memory card that stores map data in advance, It has a display device, a GPS (Global Positioning System) receiver, a detection device for detecting the current position and current direction of the vehicle, such as a gyroscope and a vehicle speed sensor. Then, the control device reads out map data including the current position of the vehicle from the storage device, displays a map image around the vehicle position on the display device screen based on the map data, and indicates the current position of the host vehicle. The vehicle position mark to be displayed is superimposed on the map image, the map image is scrolled according to the movement of the vehicle, the map image is fixed on the screen and the vehicle position mark is moved, and where the vehicle is currently located. You can see at a glance whether you are driving.

  In-vehicle navigation devices are usually equipped with a function (route guidance function) that guides a user so that the user can easily travel on the road without making a mistake. According to this route guidance function, the optimal route (typically the route with the lowest cost) that connects from the departure point (typically the current position of the vehicle) to the destination using the map data by the control device. Is automatically searched by performing simulation calculation such as horizontal search method or Dijkstra method, and the searched route is stored as a guide route, and the guide route can be distinguished from other roads on the map image while driving (For example, change the color or increase the line width), or when the vehicle approaches a predetermined distance to the intersection where the course should be changed on the guidance route, the intersection on the map image By displaying a guide map (enlarged view of the intersection, an arrow indicating the direction of travel at the intersection, the distance to the intersection, the name of the intersection, etc.) In which direction to go The user is to be able to grasp.

  Furthermore, in-vehicle navigation devices can acquire various traffic-related information from the outside via the Internet or broadcast. For example, using VICS (registered trademark) (Vehicle Information and Communication System), traffic information such as traffic jams and accidents can be obtained in real time, or data broadcasts can be received to obtain traffic information and weather information. Etc. can be acquired.

  As a technology related to this, in Patent Document 1, based on earthquake information such as the epicenter and predicted seismic intensity and the position of the own vehicle, the degree of the influence of the earthquake on the own vehicle is determined, and according to the determination result, It is described that earthquake information is notified in any form of notification, such as voice and display or display-only notification.

JP 2010-54331 A

  As described above, when an earthquake occurs while the vehicle is traveling, earthquake information such as the epicenter and the predicted seismic intensity is displayed or output as a voice.

  However, even if earthquake information such as the epicenter is reported, it is not possible to know where the place name related to the epicenter is depending on the traveling location, such as when traveling in an unfamiliar area where you are not usually traveling Sometimes. As a result, since it is not known whether the epicenter is near or far from the vehicle position, it is not possible to concentrate on driving, which may hinder safe driving.

  The present invention has been made in view of the problems of the prior art, and provides an in-vehicle navigation device and an earthquake-related information providing method capable of easily grasping the positional relationship between a vehicle and an earthquake occurrence point when an earthquake occurs. The purpose is to provide.

  In order to solve the above-described problems of the prior art, according to the basic form of the present invention, storage means storing map data, own vehicle position detection means for detecting the current position of the own vehicle, display means, and epicenter Information acquisition means for acquiring earthquake information including information on the position of the vehicle and the magnitude of the earthquake, and when the earthquake information is acquired, information on the epicenter is extracted from the earthquake information, and from the own vehicle position to the epicenter Control means for adjusting the scale of the map so that the vehicle position and the epicenter are included according to the distance of the vehicle, creating a map image with the scale adjusted and displaying it on the screen of the display means, A vehicle-mounted navigation device is provided.

  In the in-vehicle navigation device according to this aspect, the control means adjusts the scale of the map so that the position of the own vehicle is the center of the map image and the position of the epicenter is around the map image. Alternatively, the control means may adjust the scale of the map so that the position of the vehicle and the position of the epicenter are in the vicinity of the map image.

  Further, in the in-vehicle navigation device according to this aspect, the control means includes a telephone book data including information in which a registered name and a contact are associated with each other, within a predetermined range from the epicenter or a seismic intensity equal to or greater than a predetermined value. The registered name of the point included in the area of the area may be extracted, and an emergency contact selection screen for displaying the registered name in a selectable manner may be created and displayed over the map image. When the vehicle position is within a predetermined range from the epicenter or an area having a seismic intensity equal to or greater than a predetermined value, a mail notifying the current position may be transmitted to a preset contact, When the route guidance to the destination is being performed, the means reroutes the route to the destination so as not to include a route within a predetermined range from the epicenter or an area whose seismic intensity is a predetermined value or more. It is also possible to search.

  According to another aspect of the present invention, there is provided an earthquake-related information providing method in an in-vehicle navigation device for performing a route search based on map data, the step of acquiring earthquake information by an earthquake information acquisition means, A step of extracting the location of the epicenter from the earthquake information, a step of acquiring the current location of the host vehicle by the host vehicle position detecting means, and a map according to the distance from the current location of the host vehicle to the location of the epicenter There is provided an earthquake-related information providing method comprising adjusting a scale, and creating and displaying a map image of the adjusted scale.

  In the earthquake-related information providing method according to this aspect, the step of adjusting the scale of the map includes the step of setting the current position of the host vehicle as the center of the map image, and the position of the epicenter is located around the map image. A step of calculating a scale when the map is adjusted, and the step of adjusting the scale of the map includes a scale when the current position of the host vehicle and the position of the epicenter are located around the map image. May be calculated.

  Further, in the earthquake related information providing method according to this aspect, among the telephone directory data including information in which the registered name and the contact information are associated, the predetermined range from the epicenter or the seismic intensity is a predetermined value or more. Extracting the registered name of a point included in a region; creating an emergency contact selection screen for displaying the registered name in a selectable manner; and displaying the emergency contact selection screen overlaid on the map image; In addition, when the vehicle position is within a predetermined range from the epicenter or in an area where the seismic intensity is equal to or higher than a predetermined value, an email notifying the current location to a preset contact address A guidance route to the destination is searched, and route guidance is performed along the guidance route. A step of determining whether or not the guidance route is included in a certain range or in an area having a seismic intensity equal to or greater than a predetermined value; and A route to the destination so as not to include the route within the range or the region may be included.

  According to the vehicle-mounted navigation device and the earthquake-related information providing method of the present invention, when earthquake information is acquired, information on the location of the epicenter is extracted from the earthquake information, and the distance from the current position of the host vehicle to the location of the epicenter The scale of the map including the current position of the vehicle and the position of the epicenter is adjusted accordingly. For example, the scale is adjusted so that the position of the host vehicle is located at the center of the map image and the position of the epicenter is located around the map image.

  As a result, the map is displayed in a small scale when the distance from the vehicle to the epicenter is far away, and when the distance to the epicenter is short, the map is displayed in a large scale. Even so, it becomes possible to easily grasp.

It is a block diagram which shows the structure of the vehicle-mounted navigation apparatus which concerns on one Embodiment of this invention. It is a flowchart which shows an example of an earthquake related information display process. It is a figure which shows an example of the map image which displayed the own vehicle position in the center of the map image, and displayed the position of the epicenter on the periphery of the map image. It is a figure which shows an example of the map image which displayed the own vehicle position and the position of the epicenter on the periphery of a map image. It is a flowchart which shows an example of an earthquake related information display process including the display of an emergency contact selection screen. It is a figure which shows an example of the telephone directory data table containing the information of whether to contact in an emergency. It is a figure which shows an example of the map image on which the emergency contact selection screen and the own vehicle position and the epicenter were displayed in the predetermined position. It is a flowchart which shows an example of the earthquake related information display process at the time of the occurrence of an earthquake including the re-search process of a guidance path | route. It is a figure explaining the process which performs the search again of the guidance route at the time of the occurrence of an earthquake.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(Configuration of in-vehicle navigation system)
FIG. 1 is a block diagram showing a configuration of an in-vehicle navigation device 100 according to an embodiment of the present invention.

  In the figure, 1 is a DVD drive, and 1a is a storage medium in which map data and other guidance data are stored. In the present embodiment, the DVD-ROM 1a is used as a storage medium for storing such data, but a hard disk or other storage medium may be used. The map stored here is divided into longitude and latitude widths of appropriate sizes according to each scale level such as 1/1500, 1/25000, 1 / 50,000, 1/10000, etc. Roads, buildings, facilities, and other various properties included in are stored as a coordinate set of points (nodes) expressed in longitude and latitude. Map data includes (1) a road layer composed of road link data, intersection data, node data, etc., (2) a background layer for displaying roads, buildings, parks, rivers, etc. on a map image, and (3) a municipality. It consists of a character / symbol layer for displaying administrative division names such as names, road names, intersection names, characters, map symbols, and the like.

  In the road layer, the road link data supplies attribute information of each road. For each link constituting the road, the type of road (national road, highway, prefectural road, other road), hierarchization of the road network It consists of data such as the level, the number of nodes constituting the link, the road number (road name), and the width of the link connecting each node. The intersection data is a set of nodes closest to the intersection among the nodes on the link coupled to the intersection. The node data is a list of all nodes constituting the road, and includes position information for each node, information for identifying whether the node is an intersection or not, and the like.

  An operation unit 2 is provided with operation buttons and the like for operating the navigation apparatus body 10. In the present embodiment, the operation unit 2 includes a remote control transmitter, and the user can also operate the navigation apparatus body 10 with the remote control transmitter at hand.

  Also, 3 receives GPS signals sent from a plurality of GPS satellites and generates and outputs GPS data such as longitude, latitude, PDOP (Position DOP) value and HDOP (Horizontal DOP) value of the current position of the vehicle. A GPS receiver is shown. Reference numeral 4 denotes a self-contained navigation sensor. The self-contained navigation sensor 4 is composed of an angle sensor such as a gyro that detects a vehicle rotation angle, and a travel distance sensor that generates a pulse at every constant travel distance.

  Reference numeral 5 denotes a communication device such as an in-vehicle telephone for communicating with various service centers. For example, it is possible to acquire earthquake information via a network from a server of a service center that provides information about earthquakes. The service center that provides information about earthquakes uses the communication network to transmit P waves and S waves detected by seismographs installed at predetermined points, such as high-sensitivity seismic observation networks (Hi-net). And infer seismic intensity and epicenter.

  Reference numeral 6 denotes a VICS receiver that receives radio wave beacons, optical beacons, and VICS (registered trademark) (traffic information communication system) information transmitted by FM multiplex broadcasting. These beacons are installed on the roadside and connected to police stations, road managers and integration centers to provide information on traffic jams in the vicinity.

  Reference numeral 7 denotes a display unit such as a liquid crystal panel. The navigation apparatus body 10 displays a map around the current position of the vehicle on the display unit 7, a guidance route from the departure point to the destination, and a vehicle position mark. And other guidance information. The display unit 7 is provided with a touch panel on the screen, and is configured with various buttons paired with the display content of the display screen. The touch panel serves as an input device for selecting a menu or the like indicated by these various buttons. Reference numeral 8 denotes a speaker for providing guidance information to the user by voice.

  Reference numeral 9 denotes an earthquake information receiver, which receives broadcast waves including information such as emergency earthquake warnings via an antenna 9a. In the case of digital broadcasting, a digital broadcasting wave including data broadcasting of information data is received. When receiving a terrestrial digital broadcast, the receiver is activated even when the power is not turned on, and receives an emergency alert broadcast that notifies of a large-scale earthquake or the like.

  The navigation device body 10 is composed of the following. Reference numeral 11 denotes a buffer memory that temporarily stores map data read from the DVD-ROM 1a via the DVD drive 1.

  Reference numeral 12 denotes a control unit constituted by a microcomputer. The control unit 12 has a built-in navigation program, and calculates the current position of the vehicle based on a signal output from the GPS receiver 3 or a signal output from the self-contained navigation sensor 4 according to the program. Or the map data to be displayed is read from the DVD-ROM 1a to the buffer memory 11 via the DVD drive 1 or from the destination to the destination under the search conditions set using the map data read to the buffer memory 11. Various processes are executed, such as searching for a guide route up to. As will be described later, when earthquake information is acquired, a map image is generated and displayed so that the positional relationship between the epicenter and the vehicle position can be easily recognized.

  13 is a map drawing unit for generating a map image using the map data read out to the buffer memory 11, and 14 is for generating various menu screens (operation screens) and various marks such as vehicle position marks and cursors according to the operation status. This is the operation screen / mark generator.

  Reference numeral 15 denotes a guide route storage unit that stores the guide route searched by the control unit 12, and 16 denotes a guide route drawing unit that draws the guide route. The guidance route storage unit 15 stores all the nodes of the guidance route searched by the control unit 12 from the departure point to the destination. When displaying the map, the guide route drawing unit 16 reads the guide route information from the guide route storage unit 15 and draws the guide route with a color and line width different from those of other roads.

  Reference numeral 17 denotes a storage unit composed of a memory such as an EEPROM connected to the control unit 12, which makes an earthquake data table including the location of the epicenter and the magnitude of the earthquake created based on the acquired earthquake information, and communicates in an emergency. A phone book data table including contact data is stored.

  An audio output unit 18 supplies an audio signal to the speaker 8 based on a signal from the control unit 12. Reference numeral 19 denotes an image composition unit, on which a map image drawn by the map drawing unit 13 is overlaid with various marks and operation screens generated by the operation screen / mark generation unit 14, a guidance route drawn by the guidance route drawing unit 16, and the like. And output to the display unit 7.

  In the in-vehicle navigation device 100 configured as described above, as a basic operation, the control unit 12 is based on the GPS signal received by the GPS receiver 3 and the signal input from the autonomous navigation sensor 4. Detect current position. Then, map data around the vehicle is read from the DVD-ROM 1 a via the DVD drive 1 and stored in the buffer memory 11. The map drawing unit 13 generates a map image based on the map data read to the buffer memory 11 and displays a map image around the host vehicle on the screen of the display unit 7 via the image composition unit 19.

  Moreover, the control part 12 detects the present position of the own vehicle based on each signal input from the GPS receiver 3 and the self-contained navigation sensor 4 with the movement of the own vehicle, and according to the detection result, the display part 7 The vehicle position mark is superimposed on the map image displayed on the screen, and the vehicle position mark is moved as the host vehicle moves, or the map image is scrolled.

  Further, when the user operates the operation unit 2 to set a destination and other necessary information (information about a waypoint on the way to the destination, etc.), the control unit 12 reads from the GPS receiver 3 and the autonomous navigation sensor 4. The current position of the vehicle detected based on each of the signals is used as a starting point, and a route with the lowest traffic cost from the starting point to the destination is searched using the map data of the DVD-ROM 1a. Then, the route obtained by the search is stored in the guidance route storage unit 15 as a guidance route, and the guidance route is superimposed on the map image on the screen on the display unit 7 via the guidance route drawing unit 16 and the image composition unit 19. Display together.

  Below, the earthquake information display process at the time of the occurrence of an earthquake in the vehicle-mounted navigation device 100 will be described with reference to FIGS.

  FIG. 2 is a flowchart showing an example of the earthquake information display process when an earthquake occurs, which is performed by the control unit 12 of the in-vehicle navigation device 100.

  First, in step S11, earthquake information is acquired. The earthquake information is obtained by receiving an earthquake early warning provided by the Japan Meteorological Agency by broadcast waves via the earthquake information receiver 9 or via the communication device 5 and the Internet.

  The Earthquake Early Warning provided by the Japan Meteorological Agency includes the coordinates of the epicenter (for example, longitude and latitude), the magnitude of the earthquake, and the area centered on the epicenter (for example, each administrative division such as a municipality) Data for each predicted area) and predicted seismic intensity.

  Based on the received information such as the location and scale of the epicenter, an earthquake information data table is created and temporarily stored in the storage unit 17. Further, the seismic intensity information at the observation points in various places is temporarily stored in the storage unit 17 in association with the position information of each observation point.

  In the next step S12, the location of the epicenter and the magnitude (seismic intensity, magnitude) of the earthquake are extracted from the earthquake information data table temporarily stored in the storage unit 17.

  In the next step S13, the current position of the host vehicle is detected. The current position of the host vehicle is detected based on a GPS signal acquired via the GPS receiver 3 or a signal from the autonomous navigation sensor 4.

  In the next step S14, the scale of the map is adjusted according to the distance from the vehicle position to the epicenter. In order to understand the relative positional relationship between the vehicle position and the epicenter, the epicenter is displayed at a predetermined position from the periphery of the map image, for example, the edge of the display screen, when the vehicle position is displayed in the center of the map image. Such a scale is calculated. That is, the most detailed scale for simultaneously displaying the host vehicle and the epicenter on one screen is calculated.

  For example, when the position coordinate of the host vehicle is P1 (x1, y1), the position coordinate of the epicenter is P2 (x2, y2), and the size of the display screen is vertical h horizontal w, the difference of the x coordinate The actual distance is obtained from (xd = | x2-x1 |), and the scale is calculated from the actual distance and the display size w / 2. If the epicenter is not displayed at the scale calculated based on the x coordinate difference, the scale is calculated from the y coordinate difference (yd = | y2-y1 |) and h / 2. A map with a scale close to the calculated scale is extracted from the map database.

  In the next step S15, map image data in a range including the own vehicle position and the epicenter is extracted from the map of the scale calculated in step S14 and extracted from the map data. An image in which the current position of the vehicle and the position of the epicenter are superimposed is generated and displayed on the display screen.

  FIG. 3 is a diagram showing an example of map images 31 and 32 displayed on the display screen 30 when an earthquake occurs. As shown in FIG. 3A, the vehicle position mark 33 indicating the position of the vehicle is displayed at the center of the display screen 30, and the epicenter is displayed on the periphery of the display screen 30 (the right side in FIG. 3A). An epicenter mark 34 indicating the position is displayed together with a magnitude value indicating the magnitude of the earthquake. In addition, an orientation mark 37 indicating a direction on the map and a scale 38 indicating a distance on the map are displayed. The orientation mark 37 indicates that north is upward.

  3B, as in FIG. 3A, the own vehicle position mark 35 indicating the position of the own vehicle is displayed at the center of the display screen 30, and the epicenter indicating the position of the epicenter in the periphery of the display screen 30. A ground mark 36 is displayed. As can be seen from the scale states of the map images 31 and 32 and the scale 38, FIG. 3A is a map image when the epicenter is relatively far from the vehicle position, and FIG. The map image in case the distance from an epicenter to the own vehicle position is shorter than Fig.3 (a) is shown.

  FIG. 4 is a diagram showing another example of map images 41 and 42 displayed when an earthquake occurs. In FIG. 4, the current position of the host vehicle and the position of the epicenter are displayed so as to be located around the screen. As shown in FIG. 4A, a host vehicle position mark 43 indicating the position of the host vehicle is displayed on the left side periphery of the display screen 40, and an epicenter mark 44 indicating the location of the epicenter is displayed on the right side periphery. It is displayed with a magnitude value indicating the scale. In addition, an orientation mark 47 indicating a direction on the map and a scale 48 indicating a distance on the map are displayed.

  In FIG. 4 (b), as in FIG. 4 (a), an own vehicle position mark 45 indicating the position of the own vehicle is displayed around the left side of the display screen 40, and an epicenter showing the location of the epicenter is shown around the right side. A mark 46 is displayed. As can be seen from the scaled state of the map images 41 and 42 and the scale 48, FIG. 4 (a) is a map image when the epicenter is relatively far from the vehicle position, and FIG. The map image in case the distance from an epicenter to the own-vehicle position is nearer than Fig.4 (a) is shown.

  When the vehicle position and the epicenter are displayed around the screen as shown in FIG. 4, for example, the intermediate point between the vehicle position and the epicenter is set to the center position of the screen, as in FIG. Calculating the scale of the most detailed map where the vehicle position and the epicenter are displayed simultaneously on one screen.

  In addition, the color of the epicenter mark may be defined in advance corresponding to the magnitude of the seismic intensity, and the color of the epicenter mark may be changed according to the seismic intensity. In addition, it is specified that the epicenter mark itself is continuously moved left and right or up and down according to the magnitude of the seismic intensity to represent the shaking, and the epicenter mark is shaken according to the magnitude of the seismic intensity. Also good.

  In addition, the seismic intensity at the current position of the vehicle is predicted (calculated) based on the location and intensity of the epicenter and the seismic intensity information at each observation point. Alternatively, the color may be changed or a shaken image may be displayed. Further, the vehicle position mark may be expressed in such a manner that the seismic intensity at the epicenter and the seismic intensity at the vehicle position are alternately expressed.

  As described above with reference to FIGS. 2 to 4, when earthquake information is acquired while the vehicle is running, the most detailed scale in which both the current position of the host vehicle and the epicenter of the earthquake are displayed on one screen. By displaying the map, it is possible to easily grasp the relative positional relationship.

  Next, the earthquake related information display process including the display of the emergency contact selection screen will be described with reference to FIG.

  FIG. 5 is a flowchart illustrating an example of the earthquake-related information display process when an earthquake occurs, which is performed by the control unit 12 of the in-vehicle navigation device 100. In this process, it is assumed that the in-vehicle navigation device 100 and a specific mobile phone are connected, and a call can be made to the other party registered in the phone book data table via the mobile phone.

  First, in step S21, earthquake information is acquired. The earthquake information is obtained by receiving an earthquake early warning provided by the Japan Meteorological Agency by broadcast waves via the earthquake information receiver 9 or via the communication device 5 and the Internet. Information such as the location of the epicenter and the magnitude of the earthquake is extracted from the received earthquake information, and an earthquake information data table is created and temporarily stored in the storage unit 17.

  In the next step S22, the location of the epicenter and the magnitude (seismic intensity, magnitude) of the earthquake are extracted from the earthquake information data table temporarily stored in the storage unit 17.

  In addition, the area affected by the earthquake due to the occurrence of the earthquake (specified damage range) is identified. The predicted damage range may be within a predetermined range centered on the local government or the epicenter of a predetermined distance from the epicenter, or may be an area where the seismic intensity is a predetermined value or more. Moreover, you may make it determine a disaster prediction range using the existing software which estimates a disaster area from a seismic intensity and a hypocenter.

  In the next step S23, the current position of the host vehicle is detected. The current position of the host vehicle is detected based on a GPS signal acquired via the GPS receiver 3 or a signal from the autonomous navigation sensor 4.

  In the next step S24, the scale of the map is adjusted according to the distance from the vehicle position to the epicenter. Similar to step S14 in FIG. 2, the most detailed map scale for simultaneously displaying the host vehicle and the epicenter on one screen is calculated.

  In the next step S25, based on the telephone directory data, the registered names of points included in a predetermined range (forecasted damage range) from the epicenter determined in step S22 are extracted. FIG. 6 shows an example of a telephone directory data table. In the telephone book data table, a registrant ID, name (registered name), telephone number (contact address), necessity of emergency contact, address, and address coordinates (latitude, longitude) are registered. These data are associated with each other.

  For all registration data, the distance to the epicenter is calculated based on the coordinates of the epicenter and the address coordinates, and the registered names of points within a predetermined distance range are extracted. Of the extracted registered names, only the registered name “necessary” may be extracted with reference to the flag of necessity of emergency contact.

  In the next step S26, an emergency contact selection screen 75 capable of selecting a registered name is created. As shown in FIG. 7 (a) or FIG. 7 (b), the emergency contact selection screen 75 includes a contact selection unit 75a in which the extracted registered names are displayed as a list, a “Yes” button, and a “No” button. It consists of a selection decision unit 75b.

  In the next step S27, an earthquake information display image is created and displayed by overlaying the vehicle position mark, the epicenter display mark, and the emergency contact selection screen 75 created in step S26 on the scale map adjusted in step S24. To do.

  FIG. 7 is a diagram showing an example of map images 71 and 72 including an emergency contact selection screen 75 displayed on the display screen 70 when an earthquake occurs.

  As shown in FIG. 7A, a host vehicle position mark 73 indicating the current position of the host vehicle is displayed at the center of the display screen 70, and an epicenter mark 74 indicating the position of the epicenter on the right side periphery of the display screen 70. Is displayed with a magnitude value representing the magnitude of the earthquake. An orientation mark 78 indicating a direction on the map and a scale 79 indicating a distance on the map are displayed. Further, an emergency contact selection screen 75 is displayed.

  7B, as in FIG. 7A, the vehicle position mark 76 indicating the current position of the vehicle is displayed at the center of the display screen 70, and the location of the epicenter is displayed on the right side of the display screen 70. The epicenter mark 77 shown is displayed. As can be seen from the scale state of the map images 71 and 72 and the scale 79, FIG. 7A is a map image when the epicenter is relatively far from the vehicle position, and FIG. The map image in case the distance from an epicenter to the own vehicle position is shorter than Fig.7 (a) is shown.

  The user is connected to the in-vehicle navigation device 100 by selecting one of the items displayed in the list from the contact selection unit 75a of the emergency contact selection screen 75 and pressing the “Yes” button of the selection determination unit 75b. Call the phone number associated with the item via a specific mobile phone.

  As described above with reference to FIGS. 5 to 7, the map display including the display of the emergency contact selection screen 75 can easily grasp the relative positional relationship between the earthquake occurrence point and the current position of the host vehicle, Before the communication environment deteriorates, it is possible to contact relatives and acquaintances in the area where earthquake damage is expected.

  In the above processing, the vehicle is out of the predicted disaster range and the emergency contact within the predicted disaster range is contacted. However, if the vehicle is within the predicted disaster range, Then, the current position information and the like may be sent by e-mail. In that case, for example, an emergency mail transmission flag is set in the telephone directory data table, and information on the current position and seismic intensity of the vehicle is automatically distributed to a contact whose flag is 1.

  Next, an earthquake-related information display process including a route re-search process will be described with reference to FIG. In this process, it is assumed that a guidance route to the destination G has been searched.

  FIG. 8 is a flowchart illustrating an example of an earthquake-related information display process when an earthquake occurs including a re-search for a guidance route, which is performed by the control unit 12 of the in-vehicle navigation device 100.

  First, in step S31, earthquake information is acquired. The earthquake information is obtained by receiving an earthquake early warning provided by the Japan Meteorological Agency by broadcast waves via the earthquake information receiver 9 or via the communication device 5 and the Internet. Information such as the location of the epicenter and the magnitude of the earthquake is extracted from the received earthquake information to create an earthquake information data table, which is temporarily stored in the storage unit 17.

  In the next step S32, the location of the epicenter and the magnitude (seismic intensity, magnitude) of the earthquake are extracted from the earthquake information data table temporarily stored in the storage unit 17. Further, similarly to step S22 in FIG. 5, the region (damage expected range) that is affected by the earthquake due to the occurrence of the earthquake is determined.

  In the next step S33, the current position of the host vehicle is detected. The current position of the host vehicle is detected based on a GPS signal acquired via the GPS receiver 3 or a signal from the autonomous navigation sensor 4.

  In the next step S34, the scale of the map is adjusted according to the distance from the vehicle position to the epicenter. Similar to step S14 in FIG. 2, the most detailed map scale for simultaneously displaying the host vehicle and the epicenter on one screen is calculated.

  In the next step S35, it is determined whether or not the guidance route is within the expected damage range determined in step S32. This determination is performed by detecting whether or not the coordinate position of the guidance route is included in the expected damage range.

  FIG. 9 is a diagram showing an example of a map image 91 displayed on the display screen 90 when an earthquake occurs, and is an example showing a case where a guide route 95 to the destination is within a predetermined range from the epicenter. . An own vehicle position mark 92 indicating the current position of the own vehicle is displayed at the center of the display screen 90, and an epicenter mark 93 indicating the position of the epicenter is displayed on the right side periphery of the display screen 90.

  In addition, disaster prediction ranges 94a, 94b, and 94c divided by the magnitude of the seismic intensity from the epicenter indicated by the epicenter mark 93 are shown. A guidance route 95 to the destination G is included in the predicted disaster range 94c.

  In the next step S36, a search is again made for a guidance route that does not pass through a road within the expected damage range. A link cost is set so that a road link included in the predicted damage range is not selected, and a route from the vehicle position to the destination G is re-searched.

  In the next step S37, an earthquake information display image is created and displayed by superimposing the own vehicle position mark, the epicenter display mark, and the guidance route on the scale map adjusted in step S34. A guidance route 96 indicated by a broken line in FIG. 9 indicates a re-searched route.

  In addition, when the guidance route of this place is included in the disaster prediction range in step S35, the guidance route re-searched in step S36 is displayed, and when it is not included in the disaster prediction range, it is already searched. The guided route is displayed on the map screen.

  As described above, according to the in-vehicle navigation device and the earthquake-related information providing method of the present embodiment, when the earthquake information is acquired, the information on the location of the epicenter is extracted from the earthquake information, and the current position of the host vehicle is extracted. The scale of the map including the current position of the vehicle and the position of the epicenter is adjusted according to the distance to the position of the epicenter. For example, the scale is adjusted so that the position of the host vehicle is located at the center of the map image and the position of the epicenter is located around the map image.

  As a result, the map is displayed at a small scale when the distance from the host vehicle to the epicenter is far away, and the map is displayed at a large scale when the distance to the epicenter is short. It becomes possible to grasp easily.

  The above processing may not be performed for all earthquakes announced by the Japan Meteorological Agency, but may be performed when the seismic intensity exceeds a predetermined value.

  In the above description, the case where there is one epicenter is described as an example. However, the present invention is not limited to this, and the present invention can be applied to cases where earthquakes occur at a plurality of locations. When there are a plurality of epicenters, the scale of the map is adjusted so that all the epicenters are included within a predetermined range (for example, eastern Japan). At that time, a condition may be set for the seismic intensity, for example, for a predetermined seismic intensity, for example, an earthquake having a seismic intensity of 4 or less.

  Further, in the above description, the north-up display with north facing upward is targeted, but the present invention can be similarly applied to heading-up display in which the traveling direction of the host vehicle is always displayed upward.

100: In-vehicle navigation device,
1a ... DVD-ROM,
2 ... operation part,
3 ... GPS receiver,
4 ... Self-contained navigation sensor,
7 ... display part,
9 ... Earthquake information receiver,
10 ... navigation device body,
11: Buffer memory,
12 ... control unit,
15 ... guide route storage unit,
16 ... guide route drawing unit,
17 ... storage part,
31, 32, 41, 42, 71, 72, 91 ... map image,
33, 35, 43, 45, 73, 76, 92 ... own vehicle position,
34, 36, 44, 46, 74, 77, 93 ... epicenter,
37, 47, 78, 97 ... bearing mark,
38, 48, 79, 98 ... scale,
75 ... Emergency contact selection screen.

Claims (12)

Storage means storing map data;
Own vehicle position detecting means for detecting the current position of the own vehicle;
Display means;
An earthquake information acquisition means for acquiring earthquake information including information on the location of the epicenter and the magnitude of the earthquake;
When the earthquake information is acquired, the information on the epicenter is extracted from the earthquake information, and the map scale is included so that the own vehicle position and the epicenter are included according to the distance from the own vehicle position to the epicenter. Control means for creating a map image adjusted in scale and displaying it on the screen of the display means;
A vehicle-mounted navigation device comprising:   2. The vehicle-mounted vehicle according to claim 1, wherein the control unit adjusts the scale of the map so that the position of the own vehicle is the center of the map image and the position of the epicenter is around the map image. Navigation device.   The in-vehicle navigation device according to claim 1, wherein the control means adjusts the scale of the map so that the position of the own vehicle and the position of the epicenter are in the vicinity of the map image.   The control means extracts the registered name of a point included in a region within a predetermined range from the epicenter or a region having a seismic intensity equal to or greater than a predetermined value from the telephone directory data including information in which a registered name and a contact address are associated with each other. The in-vehicle navigation device according to claim 2 or 3, wherein an emergency contact selection screen for displaying the registered name so as to be selectable is created and displayed on the map image.   The control means, when the vehicle position is within a predetermined range from the epicenter or within an area having a seismic intensity equal to or greater than a predetermined value, transmits a mail notifying the current position to a preset contact. The in-vehicle navigation device according to claim 4.   When the route guidance to the destination is being performed, the control means routes the route to the destination so as not to include a route within a predetermined range from the epicenter or an area having a seismic intensity of a predetermined value or more. The vehicle-mounted navigation device according to claim 1, wherein the search is performed again. An earthquake-related information providing method in an in-vehicle navigation device that performs route search based on map data,
Obtaining earthquake information by means of earthquake information obtaining means;
Extracting the location of the epicenter from the earthquake information;
Acquiring the current position of the host vehicle by the host vehicle position detecting means;
Adjusting the scale of the map according to the distance from the current position of the host vehicle to the position of the epicenter;
Creating and displaying the adjusted scale map image;
An earthquake-related information providing method characterized by comprising: The step of adjusting the scale of the map includes:
Making the current position of the host vehicle the center of a map image;
Calculating a scale when the location of the epicenter is located around the map image;
The earthquake related information providing method according to claim 7, further comprising: In the step of adjusting the scale of the map,
The earthquake-related information providing method according to claim 7, wherein a scale when the current position of the host vehicle and the position of the epicenter is located around the map image is calculated. Further, the step of extracting the registered name of a point included in a region within a predetermined range from the epicenter or a region having a seismic intensity equal to or higher than a predetermined value from the telephone directory data including information in which the registered name and contact information are associated with each other. When,
Creating an emergency contact selection screen that displays the registered name in a selectable manner;
Displaying the emergency contact selection screen superimposed on the map image;
The earthquake-related information providing method according to claim 8 or 9, characterized by comprising:   Furthermore, when the vehicle position is within a predetermined range from the epicenter or an area having a seismic intensity equal to or greater than a predetermined value, the vehicle has a step of transmitting an e-mail notifying the current position to a preset contact. The earthquake-related information providing method according to claim 10. When a guidance route to the destination is searched and route guidance is performed along the guidance route,
A step of determining whether or not the guidance route is included in a predetermined range from the epicenter or in an area having a seismic intensity equal to or greater than a predetermined value;
A step of re-searching the route to the destination so that the route does not include the route within the range or the region when the guidance route is included in the region within the predetermined range or the seismic intensity is greater than or equal to a predetermined value; When,
The earthquake related information providing method according to claim 7, further comprising:

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