JP4971822B2 - Navigation device - Google Patents

Description

  The present invention relates to a navigation device having a radio broadcast or television broadcast reception function, and more particularly to a navigation device having an emergency broadcast reception function broadcast when a natural disaster such as an earthquake or tsunami occurs. Navigation that searches for and guides the optimal evacuation site and the optimal route from the current location to the evacuation site by searching for evacuation sites and recommended evacuation routes around the current location based on the current location of the navigation device It relates to the device.

  In general, navigation systems that perform route guidance by searching for a route from a desired departure point to a destination are widely used. As such a navigation system, an in-vehicle navigation system mounted on an automobile, a navigation system for a pedestrian who moves using walking and transportation, and the like are known. A system for displaying a map of the vicinity based on the current position is also known. Recently, a communication type system that uses a portable terminal device such as a mobile phone and downloads a guide route or a map from a predetermined information distribution server, a route search server, or the like is widely used as these systems.

  The navigation device comprises map data and road network data for route search, searches for the optimum route from the departure point to the destination by referring to the road network data using the desired departure point and destination as route search conditions, and maps The optimum route is displayed as a guidance route on the top, and the route to the destination is guided. In addition to positioning the current position of the navigation device by satellite navigation using a GPS receiver, in-vehicle navigation devices, positioning by autonomous navigation based on the output of various sensors that detect vehicle movement, such as vehicle speed sensors and steering angle sensors. To do. The current position detected by these positioning means is displayed on the map as a current position mark so that the movement of the navigation device can be confirmed on the map every moment.

  The road network data used for route search in the navigation device is configured as follows. That is, the road (route) of the map data is a node, the position of the inflection point is a node, the route connecting each node is a link, and the cost information (distance and required time) of all links is included. The route search means refers to this road network data and sequentially searches for a link from the departure node to the destination node, and traces the node and the link with the smallest cost information of the link as a guide route. Can guide the shortest route. As such a route search method, a method called label determination method or Dijkstra method is used.

  The map data in the map information providing system and the navigation system is composed of unit map data (mesh map) divided into meshes at predetermined latitude and longitude intervals. In the communication-type map information providing system and navigation system, the map information distribution server and the route search server include unit map data including the current position of the map display device and a specified specific point, and the unit map up, down, left, right, A total of nine mesh unit map data of unit map data adjacent in the oblique direction is distributed to the map display device.

  By the way, in recent years, disasters and incidents that cause great local damage such as earthquakes and terrorism have occurred frequently all over the world, and especially in Asian countries, major disasters such as tsunamis and earthquakes are frequent. Also, as symbolized by terrorism at trade centers in the United States, terrorist damage has been reported in various countries around the world. Such a disaster is also expected to occur in Japan. In particular, earthquakes are thought to occur with a high probability if the location and timing are different. In such a natural disaster, emergency broadcasts are made through radio and television broadcasts, and the system is designed to minimize the damage to residents.

  Government agencies such as local governments set recommended evacuation sites such as parks and schools in each area to ensure the safety of residents in the area and people working in the area. In addition, recently, a map called “homecoming support map in the event of an earthquake” is also provided to support people who return home from school or work when an earthquake occurs.

  Further, a mobile phone system that transmits information to a mobile phone and performs evacuation guidance when a disaster occurs is disclosed in the following Patent Document 1 (Japanese Patent Laid-Open No. 2002-111182). In this cellular phone system, when a disaster occurs in a call service area covered by a base station, the service control station is notified of the disaster. Then, the map information together with the disaster information is sent from the service control station to the mobile phone existing in the call service area adjacent to the call service area via the exchange. Thus, the mobile phone displays map information indicating the disaster occurrence area and performs a specific disaster notification at regular time intervals. Further, when the owner of the mobile phone determines that the current location information is required, the current location information is acquired from the service control station. As a result, the mobile phone displays the map of the disaster area and the current position in an overlapping manner.

Moreover, the disaster prevention system using the portable terminal device at the time of a disaster is disclosed by the following patent document 2 (Unexamined-Japanese-Patent No. 2005-17027), for example. In this evacuation guidance system disclosed in Patent Document 3, when the guidance host device receives a request for evacuation guidance and location information from a GPS mobile phone having a position detection means, the disaster stored in the database from the location information. Search the information database and map information database to find a route with less danger to the evacuation site near the location, and configure the GPS mobile phone 3 to notify the guidance information to the evacuation site together with the map information. Evacuation guidance was made promptly and safely.
JP 2002-111182 A (FIG. 1) Japanese Patent Laying-Open No. 2005-17027 (FIG. 1)

  When a disaster occurs while moving in an automobile, it is preferable that the navigation device can be used to appropriately guide to a predetermined evacuation place closest to the place where the vehicle is currently traveling. However, the systems disclosed in Patent Document 1 and Patent Document 2 use a mobile phone as a terminal, and cannot be applied to a navigation device that does not have a communication function with a communication base station. was there.

  The inventor of the present application has conducted various studies to solve the above-described problems. As a result, the navigation device installed in the automobile has a broadcast receiving function for receiving radio and television broadcasts in addition to the navigation function. Focusing on the fact that navigation devices can receive emergency broadcasts when a disaster occurs, search for evacuation locations around the current location, recommended evacuation routes, etc. when receiving emergency broadcasts, and find the evacuation location from the optimal evacuation location and current location The present invention has been completed by conceiving that the above-mentioned problems can be solved by searching for and guiding the optimum route up to and including the above.

  That is, the present invention aims to solve the above-mentioned problems, and when the navigation device receives an emergency broadcast at the time of a disaster, it searches for an evacuation place around the current location, a recommended evacuation route, etc. It is an object of the present invention to provide a navigation device capable of searching and guiding an optimum route from an evacuation site and a current position to the evacuation site.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is
In a navigation apparatus provided with broadcast receiving means,
The navigation device includes a map database, a road database, and an evacuation site database, and stores storage means, display means, input means, positioning means, and route search means in which a point and a route from the point to the evacuation place are stored in advance. Emergency operation control means,
When the broadcast receiving means receives an emergency broadcast, the emergency operation control means activates an emergency operation mode, and when the current position measured by the positioning means is the same as the point stored in the storage means, the storage means When the current position information measured by the positioning means is different from the point stored in the storage means, the route from the evacuation site to the evacuation place is read out and displayed together with the map information on the display means. Referring to an evacuation site database, search for an evacuation site around the current position, and the route search means searches for a route to the searched evacuation site based on the current position information, and can be reached in the shortest distance from the current position And searching for an evacuation route to the evacuation site, and displaying the evacuation route together with map information on the display means.

The invention according to claim 2 of the present application is the navigation device according to claim 1,
The navigation device comprises emergency broadcast reception menu data and evacuation route guidance storage means, and an emergency broadcast reception menu including an evacuation route guidance request in the display means based on the emergency broadcast reception menu data when operating in an emergency mode. And when the current position is different from the point stored in the storage means, the route search means searches for the route to the searched evacuation site based on the current position information, The evacuation site that can be reached by the evacuation route and the evacuation route to the evacuation site are searched, and the search result is stored in the evacuation route guidance storage means.

The invention according to claim 3 of the present application is the navigation device according to claim 2,
When the emergency operation mode is activated, the navigation device stores a current position in the storage means when an evacuation route guidance request is selected in an emergency broadcast reception menu including an evacuation route guidance request displayed on the display means. If the current location is different from the location stored in the storage means, the route stored in the storage means is read out and the route is displayed on the display means together with the map information. The evacuation route memorize | stored in the memory | storage means is read, and the said evacuation route is displayed on the said display means with map information, 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 or claim 3,
The navigation device includes a recommended evacuation road database, and when the emergency operation mode is activated, the route search means adds the data of the recommended evacuation road database to the road database and searches for a route to the evacuation site. Features.

  In the invention according to claim 1, the navigation device includes a storage unit that stores a route to a predetermined point in advance, an evacuation site database, and an emergency operation control unit, and when the broadcast reception unit receives an emergency broadcast, The time operation control unit operates the emergency operation mode, and if the current position measured by the positioning unit is a point stored in advance, the route stored in advance is read from the storage unit, and the map unit displays the evacuation route together with the map information. Is displayed, the evacuation site database is referred to based on the current position information measured by the positioning means, the evacuation places around the current position are searched, and the route search means is a route to the evacuation place searched based on the current position information Search for an evacuation site that can be reached in the shortest distance from the current position and an evacuation route to the evacuation site, and map information and Evacuation routes to display.

  According to such a configuration, in the navigation device, when an emergency broadcast that is broadcast when a disaster occurs or the like is received, for example, when you are at a prestored location such as a home, a route can be displayed quickly and stored in advance If it is not a point, the user can search for an evacuation site around the current location, a recommended evacuation route, etc., and search for and guide the optimum evacuation site and the optimal route from the current location to the evacuation site.

  In the invention according to claim 2, in the navigation device according to claim 1, the navigation device includes emergency broadcast reception menu data and evacuation route guidance storage means, and the current position is stored in advance when the emergency operation mode is activated. If it is not a point, the emergency broadcast reception menu including the evacuation route guidance request is displayed on the display unit based on the emergency broadcast reception menu data, and the route search unit is configured to display a route to the evacuation site searched based on the current position information. The evacuation site that can be reached in the shortest distance from the current position and the evacuation route to the evacuation site are searched for, and the search result is stored in the evacuation route guidance storage means.

  According to such a configuration, various services that can be selected at the time of emergency broadcast reception, such as evacuation route guidance, emergency broadcast URL selection, emergency peripheral search (hospital, fire department, police station, etc.) It is possible to display and search for an evacuation place and an evacuation route in advance while the user performs a menu selection operation.

  In the invention according to claim 3, in the navigation device according to claim 2, when the emergency operation mode is activated, the evacuation route guidance request is selected in the emergency broadcast reception menu including the evacuation route guidance request displayed on the display means. If the current position is the same as a pre-stored point, the route is read from the storage unit and displayed on the display unit together with the map information. If the current position is different from the pre-stored point, the evacuation route guidance is displayed. The evacuation route stored in the storage means is read out and the evacuation route is displayed together with the map information on the display means.

  According to such a configuration, when a user operates the menu screen when receiving an emergency broadcast to search for an evacuation site and request guidance for an evacuation route, the user can immediately guide the evacuation site and the evacuation route. Become.

  According to a fourth aspect of the present invention, in the navigation device according to the first or second aspect, the navigation device includes a recommended evacuation road database, and when the emergency operation mode is activated, the route search means is configured to use the road database. The route to the evacuation site is searched by adding the data of the recommended evacuation road database.

  According to such a configuration, when searching for a route to an evacuation site, an evacuation route to the evacuation site is a relatively safe and easy evacuation route with few dangerous places, which is recommended in advance as an evacuation route. Can be guided as.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiments shown below exemplify a navigation device for embodying the technical idea of the present invention, and are not intended to specify the present invention for this navigation device. The present invention is equally applicable to navigation devices of other embodiments included in the scope.

  FIG. 1 is a block diagram showing a configuration of a navigation device 10 according to the present invention. The navigation device 10 includes control means 101, broadcast receiving means 102, display means 103, input means 104, positioning means 105, route search means 106, emergency operation control means 107, emergency broadcast reception menu data 108, map database 111, A road database 112, an evacuation route guidance storage means 113, an evacuation place database 114, a recommended evacuation road database 115, and a route storage means 116 are provided.

  Although not shown, the control means 101 is a microprocessor having a RAM, a ROM, and a processor, and controls the operation of each unit by a control program stored in the ROM. The broadcast receiving unit 102 is a receiving unit that receives a radio broadcast or a television broadcast. The display means 103 is a display unit composed of a liquid crystal display unit or the like, and displays a map image including a television broadcast and a guide route. The input means 104 is composed of operation buttons, a touch panel, and the like, and operates various functions of the navigation device and inputs required numerical values and characters.

  The positioning means 105 is a satellite navigation means for positioning the current position of the vehicle by satellite navigation using a GPS receiver, and the current position of the vehicle based on the output of various sensors such as a vehicle speed sensor and a steering angle sensor provided on the vehicle. It consists of a self-contained navigation means that measures the direction. The route search means 106 searches for an optimum route between two points set with reference to the road database 112.

  These configurations are the same as those of a normal navigation device. Based on the current position measured by the positioning means 105, unit map data of a predetermined size including the current position is read from the map database 111 and displayed on the display means 103 together with the current position mark. The optimum route data searched with reference to the road database 112 is drawn in a specific color on the map image displayed on the display means 103.

  In this embodiment, the evacuation site database 114 stores data of evacuation sites set by administrative agencies such as the country, municipalities, and the private sector as evacuation sites in the event of a disaster such as an earthquake. The recommended evacuation route database 115 stores data of recommended evacuation roads such as trunk roads that are presumed to be relatively safe during evacuation.

  The route storage means 116 stores the route from the point designated by the user to the evacuation site. The route from the point where the stay time such as home or office, which is input in advance by the user, is considered to be long to the evacuation site is stored. At this time, the evacuation site is obtained by referring to the evacuation site database 114 to obtain the nearest evacuation site of the input point, and by referring to the recommended evacuation route database 115 to obtain the evacuation route, and locating the point, the evacuation place, and the evacuation route. They may be stored in association with each other, or a point, an evacuation place, and an evacuation route may be designated and stored by the user.

  When the broadcast receiving means 102 receives an emergency broadcast, the emergency operation control means 107 puts the navigation device 10 into an emergency operation mode. In the emergency operation mode, based on the information on the current position measured by the positioning means 105, it is determined whether or not the current position is a point stored in the route storage means 116, and the same as the stored point. Reads out the evacuation place and route from the route storage means 116, and if the current position is different from the point stored in the route storage means 116, the route search means 106 first refers to the evacuation place database 114. Search for an evacuation site within a predetermined distance range (generally called a peripheral search). Next, the route search means 106 searches the optimum route to each evacuation site searched by the surrounding search using the current position as the departure point, and in order from the nearest evacuation site or the nearest evacuation site and its evacuation site. The evacuation route is displayed on the display means 103 together with the map. The determination as to whether or not the current position is the same as the point stored in the route storage unit 116 is, for example, a radius from the point where the current position is stored in the route storage unit 116 in consideration of the calculation error of the current position. If it is within 30 m, it is determined that the current position is the same as the point stored in the route storage means 116.

  In the route search to the evacuation site, the route search means 106 can search for a safer evacuation route by searching the normal road database 112 with the data of the recommended evacuation road database 115. According to such a configuration, the user can immediately know the nearest evacuation site and the guide route to the evacuation site when receiving the emergency broadcast. Further, the data of the evacuation site and the evacuation route to the evacuation site can be temporarily stored in the evacuation route guidance storage unit 113.

  Further, when the navigation device 10 is in the emergency operation mode, the emergency broadcast reception menu based on the emergency broadcast reception menu data 108 is displayed on the display means 103, and the route search means 106 uses the area around the evacuation site. Execute search and evacuation route search, temporarily store the result in the evacuation route guidance storage means 113, and evacuate immediately according to the current location when the item of evacuation location / evacuation route is selected in the emergency broadcast reception menu An evacuation place and an evacuation route can be displayed from the route guidance storage means 113 or the route storage means 116.

  FIG. 2 is a diagram showing an example of an emergency broadcast reception menu screen displayed when an emergency broadcast is received. In FIG. 2, the date and time display field 20 displays the current date and time when the emergency broadcast is received. In the menu item fields 21 to 25, emergency evacuation route search / guidance, emergency information URL display for connecting to a URL providing emergency information, and search for facilities such as hospitals, police, and fire departments, respectively. The selection items of the search for surroundings, the emergency action pattern guidance at the time of emergency to advise emergency action at the time of disaster, and the radio / TV channel selection for selecting the radio / TV broadcast are displayed. The user scrolls the scroll button 201 to select a desired menu item and operates the selection button 202 to confirm the selection item.

  When the emergency evacuation route search / guidance item is selected, the control unit 101 reads the evacuation location and evacuation route from the evacuation route guidance storage unit 113 or the route storage unit 116, and displays the evacuation location and evacuation route together with the map on the display unit 103. Display. According to this configuration, it becomes possible to provide evacuation route guidance immediately compared to searching for an evacuation place after an emergency evacuation route search / guidance item is selected and performing an evacuation route search.

  FIG. 3 is a flowchart illustrating an example of an operation procedure of the navigation device 10 when the emergency operation mode is set. In step S101, when the broadcast receiving unit 102 receives the emergency broadcast and the emergency operation control unit 107 puts the navigation device 10 into the emergency operation mode, the route search unit 106 receives the current position information from the positioning unit 105 in the process of step S102. To get. In step S103, it is determined whether or not the current position is the same as the point stored in the route storage unit 116.

  If it is determined that the current position is different from the point stored in the route storage unit 116 (N in step S103), the route search unit 106 refers to the evacuation site database 114 in the process of step S104 and determines from the current position. The evacuation site within the distance range is searched, and the optimum route from the current position to each evacuation site is searched with reference to the road database 112. At this time, the evacuation route may be searched by taking into consideration the data of the recommended evacuation road accumulated in the recommended evacuation road database 115.

  Next, in the process of step S105, the route search means 106 selects the evacuation place closest to the current position (can be reached in the shortest time or the shortest distance) and the evacuation route to the evacuation place, and in the process of step S106, the map database 111 is selected. The map including the current position and the evacuation place is read out from the display, and the map, the evacuation place, and the evacuation route are displayed on the display means 103. When a plurality of evacuation sites are searched, the evacuation sites can be displayed in the closest order, a specific evacuation site can be selected for the user, and the evacuation route to the evacuation site can be displayed. Moreover, when the evacuation place within the predetermined distance range cannot be searched, the search range may be expanded stepwise.

  On the other hand, if it is determined in step S103 that the current position is the same as the point stored in the route storage unit 116 (Y in step S103), the evacuation place and route stored in the route storage unit 116 in step S107. In step S108, a map including the current position and evacuation place is read from the map database 111, and the map, the evacuation place, and the route are displayed on the display means 103.

  FIG. 4 is a flowchart showing another example of the operation procedure of the navigation device 10 when an emergency broadcast is received. In step S201, the broadcast receiving unit 102 receives the emergency broadcast, and the emergency operation control unit 107 sets the navigation device 10 in the emergency operation mode. When the navigation device 10 enters the emergency operation mode, the emergency broadcast reception menu is displayed on the display means 103 based on the emergency broadcast reception menu data 108 in the process of step S202.

  At the same time, the route search means 106 acquires the current position information from the positioning means 105 in the process of step S203. Next, in step S204, it is determined whether or not the current position is the same as the point stored in the route storage unit 116.

  When it is determined in the process of step S204 that the current position is different from the point stored in the route storage unit 116 (N in step S204), the route search unit 106 refers to the evacuation site database 114 in the process of step S205. Are searched for an evacuation site within a predetermined distance range, and an optimum route from the current position to each evacuation site is searched with reference to the road database 112. At this time, the evacuation route may be searched by taking into consideration the data of the recommended evacuation road accumulated in the recommended evacuation road database 115.

  Next, in the process of step S206, the route search means 106 selects the evacuation place closest to the current position (can be reached in the shortest time or the shortest distance) and the evacuation route to the evacuation place, and in the process of step S207, the evacuation place The evacuation route data is temporarily stored in the evacuation route guidance storage means 113. When a plurality of evacuation sites are searched, each evacuation site, evacuation route to the evacuation site, required distance and time are temporarily stored.

  Next, in step S208, the navigation device 10 determines whether evacuation route guidance is requested from the emergency broadcast reception menu. When the evacuation route guidance is requested, the process proceeds to the determination process of step S209, and it is determined whether or not the current position when shifting to the emergency operation mode is the same as the point stored in the route storage unit 116. If not (N in Step S209), in the process of Step S210, the data of the evacuation location and the evacuation route temporarily stored in the evacuation route guidance storage means 113 is read out, and the current position and evacuation location are read from the map database 111 in the process of Step S211. Is read out, and the map, the evacuation place, and the evacuation route are displayed on the display means 103.

  On the other hand, in the determination process of step S209, when it is determined that the current position when shifting to the emergency operation mode is the same as the point stored in the route storage unit 116 (Y in step S209), in the process of step S212, The evacuation place and route stored in the route storage means 116 are read out, and the map including the current position and evacuation place is read out from the map database 111 and displayed on the display means 103 in step S213.

  If it is determined in step S208 that an item other than evacuation route guidance has been selected from the emergency broadcast reception menu, the process proceeds to step S214, and the request selected in the emergency broadcast reception menu is displayed. And return to the process of step S208.

  As described above, according to the navigation device 10 according to the present invention, when an emergency broadcast is received, if the current position is a point stored in advance, the route to the evacuation site is stored in a route stored in advance. If the current position is not stored in advance, the evacuation site is automatically searched and the route to the nearest evacuation site can be immediately guided.

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 the emergency broadcast reception menu screen displayed at the time of emergency broadcast reception. It is a flowchart which shows an example of the operation | movement procedure of the navigation apparatus at the time of receiving emergency broadcast. It is a flowchart which shows the other example of the operation | movement procedure of the navigation apparatus at the time of receiving emergency broadcast.

Explanation of symbols

10. Navigation device 101 ... Control means 102 ... Broadcast receiving means 103 ... Display means 104 ... Input means 105 ... Positioning means 106 ... Route search means 107 ... Emergency Time operation control means 108 ... Emergency broadcast reception menu data 111 ... Map database 112 ... Road database 113 ... Evacuation route guidance storage means 114 ... Evacuation place database 115 ... Recommended evacuation road database 116: Route storage means

Claims (4)

In a navigation apparatus provided with broadcast receiving means,
The navigation device includes a map database, a road database, and an evacuation site database, and stores storage means, display means, input means, positioning means, and route search means in which a point and a route from the point to the evacuation place are stored in advance. Emergency operation control means,
When the broadcast receiving means receives an emergency broadcast, the emergency operation control means activates an emergency operation mode, and when the current position measured by the positioning means is the same as the point stored in the storage means, the storage means When the current position information measured by the positioning means is different from the point stored in the storage means, the route from the evacuation site to the evacuation place is read out and displayed together with the map information on the display means. Referring to an evacuation site database, search for an evacuation site around the current position, and the route search means searches for a route to the searched evacuation site based on the current position information, and can be reached in the shortest distance from the current position A navigation route to the evacuation site and displaying the evacuation route together with map information on the display means. Apparatus.   The navigation device comprises emergency broadcast reception menu data and evacuation route guidance storage means, and an emergency broadcast reception menu including an evacuation route guidance request in the display means based on the emergency broadcast reception menu data when operating in an emergency mode. And when the current position is different from the point stored in the storage means, the route search means searches for the route to the searched evacuation site based on the current position information, 2. The navigation apparatus according to claim 1, wherein an evacuation place that can be reached by evacuation and an evacuation route to the evacuation place are searched, and a search result is stored in the evacuation route guide storage means.   When the emergency operation mode is activated, the navigation device stores a current position in the storage means when an evacuation route guidance request is selected in an emergency broadcast reception menu including an evacuation route guidance request displayed on the display means. If the current location is different from the location stored in the storage means, the route stored in the storage means is read out and the route is displayed on the display means together with the map information. 3. The navigation apparatus according to claim 2, wherein the evacuation route stored in the storage means is read and the evacuation route is displayed together with map information on the display means.   The navigation device includes a recommended evacuation road database, and the route search means searches the route to the evacuation site by adding data of the recommended evacuation road database to the road database. Item 3. The navigation device according to Item 2.

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