JP2005321323A - Navigation system and route guiding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a "navigation system and route guiding method" capable of executing guiding operation simultaneously ensuring safety of passengers of the car from disasters, if occurred, and accompanying danger. <P>SOLUTION: The system has a controller 104 including a wave reception means 101, a GPS signal reception means 102 and a navigation controller 105 and a data base 107. The navigation system 100 for executing the operation guiding to a guiding route and simultaneously ensuring the safety of the passengers of the own car when receiving emergency information in the case of disaster occurrence is constituted so that the navigation controller 105 specifies a predicted danger location around the own car based on the position of the own car and the predicted danger location stored in the data base 107, and surveys a safe guiding route capable of avoiding the predicted danger location on the basis of the positions of the own car and of the predicted danger location. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a route guidance method for an automobile and a navigation device using the same, and more particularly, a method for performing route guidance for avoiding danger due to a disaster when a disaster occurs during traveling, and the method. The present invention relates to a navigation device that can be executed.

  In recent years, navigation devices have been developed that have not only a simple route search function but also a driving support function for the driver by providing various information in real time to the driver. . In particular, in the event of a disaster such as an earthquake or volcanic activity, the development of a method for performing route guidance for safely avoiding the driver from around the place where the disaster occurred or a navigation device that performs this operation is being developed. ing.

  As described above, as a method of safely avoiding the driver from the vicinity of the place where the disaster occurred as described above, as shown in Patent Document 1, when a disaster occurs, the disaster occurrence area and its A method is disclosed in which an optimum evacuation method is automatically determined in surrounding vehicles, and a driver executes evacuation according to the method.

Japanese Patent Laid-Open No. 2002-190084

  The disaster evacuation method disclosed in Patent Document 1 includes a navigation device 4 including a control unit 5, a display unit 6a and a speaker 6b and a signal receiver connected to the control unit 5, as shown in FIG. The vehicle 3 that the vehicle has has acquired disaster information from the VICS (road traffic information communication system) center 1 connected to the radio beacon transmitter 2a, the optical beacon transmitter 2b, and the FM multiplex broadcaster 2c, and based on this disaster information When warning is issued to the driver and emergency evacuation is determined to be necessary, it is possible to continue driving while circumventing the disaster area or to drive the vehicle to a nearby emergency evacuation site. This is a method for ensuring the safety of the driver by selecting one of them and guiding the navigation device 4. According to such a method, since the optimum evacuation method is automatically selected based on the disaster information, it is possible to execute evacuation quickly and ensure the safety of the driver.

  However, in the evacuation method at the time of occurrence of a disaster disclosed in Patent Document 1, based on the disaster information and emergency evacuation site information provided from the VICS center 1, a route detouring the disaster occurrence area itself is guided, or The operation of guiding the shortest or fastest route to the emergency evacuation site is performed, but a secondary disaster caused by an earthquake such as a tsunami caused by an earthquake in an area along the sea, for example, If there is a risk of tsunami or falling rocks, avoid the above-mentioned detour route or the shortest route to emergency evacuation site even if there is a risk of secondary disaster As a result, there is a problem that there is a risk that the driver will encounter a secondary disaster.

  Accordingly, the present invention has been made to solve the above-described problem, and in the event of a disaster, navigation capable of performing a guidance operation while ensuring the safety of the vehicle occupant from the disaster and the dangers associated therewith. An object is to provide a device and a route guidance method.

    In order to solve the above-mentioned problems, the present invention executes a guidance route guidance operation while ensuring the safety of the passenger of the host vehicle when emergency information is received at the time of a disaster as described in claim 1 A navigation unit that includes a receiving unit that receives the emergency information, a control unit that includes a GPS signal receiving unit that receives a GPS signal that identifies the position of the host vehicle, map information, and the navigation device. A database having information on a predicted dangerous point that is assumed to be dangerous according to the received emergency information, and the control unit is configured to obtain a navigation controller and drawing data based on the database according to a command from the navigation controller. An image information display unit to display, and a voice for presenting voice information to the passenger according to a command from the navigation controller An information output unit, the navigation controller identifies the predicted danger point related to a route to the destination based on the host vehicle position and the data of the predicted risk point, and determines the host vehicle position and the predicted risk. It is configured to search for a safety guidance route capable of avoiding the predicted dangerous location based on the location of the location. According to such a configuration, when a disaster occurs and emergency information is received, a predicted dangerous point is determined based on a keyword included in the emergency information and data stored in the database, and the predicted dangerous point is avoided. In order to search again for a safe guidance route that can be performed, it is possible to realize a navigation device that can perform a guidance operation while ensuring the safety of the vehicle occupant from the disaster and the dangers associated therewith.

  The navigation device according to claim 1, for example, as in claim 2, the control unit further includes a wireless line communication unit, and the navigation controller acquires real-time disaster information using the wireless line communication unit, It can also be configured to identify the predicted dangerous spot around the host vehicle based on the host vehicle, the predicted dangerous spot data, and the real-time disaster information.

  The navigation device according to claim 1 or 2 further includes operation input means, for example, as in claim 3, and the operation input determines whether or not the passenger searches for the safety guidance route. It can also be configured to be selectable using means.

  Further, according to the present invention, as described in claim 4, when emergency information is received at the time of occurrence of a disaster, a route for performing a guidance route guidance operation using the navigation device while ensuring the safety of the passenger of the host vehicle A navigation method, wherein the navigation device includes a receiving unit that receives the emergency information, a control unit that includes a GPS signal receiving unit that receives a GPS signal that specifies the position of the host vehicle, map information, and the reception A database having information on a predicted dangerous place where a danger corresponding to the emergency information is assumed, and the predicted dangerous place related to the route to the destination based on the vehicle position and the data of the predicted dangerous place A safe guidance route that can avoid the predicted dangerous point is searched based on the predicted dangerous point specifying step of identifying the vehicle and the position of the host vehicle and the predicted dangerous point. It includes the operations of the search step. According to such a method, when a disaster occurs and emergency information is received, a predicted dangerous point is determined based on a keyword included in the emergency information and data stored in the database, and the predicted dangerous point is avoided. In order to search again for the safe guidance route that can be performed, it is possible to perform the guidance operation while ensuring the safety of the vehicle occupant from the disaster and the associated danger.

  According to a fourth aspect of the present invention, in the route guidance method according to the fifth aspect, for example, the control unit is provided with a wireless line communication unit, and the information communication for acquiring real-time disaster information using the wireless line communication unit. The step of identifying a predicted dangerous spot further includes a step of identifying the predicted dangerous spot in the vicinity of the own vehicle based on the data of the host vehicle, the predicted dangerous spot, and the real-time disaster information. can do.

  In the route guidance method according to claim 4 or 5, for example, as described in claim 6, the control unit is provided with an operation input unit, and the operation input unit is used after the predictive risk point specifying step. The passenger may further include a selection step of selecting whether or not the passenger searches for the safety guidance route.

  The route guidance method according to any one of claims 4 to 6 may further include a warning step of warning the emergency information as text information or voice information to the passenger, for example, as in claim 7. Good.

  According to the present invention, when disaster information is received by the radio wave receiving means when a disaster occurs, the position of the own vehicle is specified by the GPS signal receiving means, and the disaster is related based on the map information and the hazard map stored in the database. Since the route guidance is performed by searching again for the guidance route that avoids the predicted dangerous point where danger is assumed, the guidance operation can be executed while ensuring the safety of the vehicle occupant from the disaster and the associated danger. A route guidance method and a navigation device using the route guidance method can be realized.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  First, Example 1 of the present invention will be described. FIG. 2 is a block diagram illustrating a configuration of the navigation device 100 according to the first embodiment. The navigation device 100 includes a radio wave receiving unit 101, a GPS signal receiving unit 102, an operation input unit 103, a control unit 104, and a database 107. The radio wave receiving means 101 is a receiver that receives signal radio wave information (hereinafter referred to as VICS information) from a VICS (road traffic information communication system) center, or radio waves such as FM multiplex broadcasting and digital broadcasting. The GPS signal receiving means 102 is a receiver that receives position information of the host vehicle from a GPS (Global Positioning System) satellite. The operation input unit 103 is an operation unit provided with various operation keys and the like for operating the control unit 104, and may be provided on the surface of the control unit 104. The radio wave receiving unit 101 and the GPS signal receiving unit 102 are electrically connected to the navigation controller 105 of the control unit 104. In addition to the case where the operation input unit 103 is provided on the surface of the apparatus main body, the operation input unit 103 may be connected to the navigation controller 105 as an independent operation unit so as to be able to communicate with the navigation controller 105 in a wired or wireless manner. The database 107 is composed of, for example, a hard disk, a DVD-RW (DVD Rewritable), etc., and is necessary for route guidance, for example, a map data file storing map information, an intersection data file storing information about intersections, road types, Depending on the purpose of use categorized into genres such as road data files that store information about roads such as the start and end points of roads, node data files that store east longitude and north latitude coordinates at one point on the road, and gas stations and convenience stores A guide point data file storing the position coordinates of feature objects such as facilities and guidance information related to the feature objects is stored. In addition to the above-described data file, the database 107 also includes a so-called hazard map such as a predicted danger point where a danger such as a tsunami, flood, or landslide is expected to occur according to the topography and climate on the map. I remember it.

  The control unit 104 includes a navigation controller 105, a memory 106, an image information generation unit 108, and an audio information generation unit 109. The navigation controller 105 is connected to the memory 106, the database 107, the image information generation unit 108, and the audio information generation unit 109, and controls the operation of the control unit 104 and the entire navigation device 100. The memory 106 temporarily stores information received by the radio wave receiving unit 101 and the GPS signal receiving unit 102, information necessary for control of the control unit 104, and the like. The memory 106 also stores various programs that operate the navigation controller 105.

  Based on the drawing data output from the navigation controller 105, the image information generation unit 108 includes image information such as a map image around the host vehicle, a vehicle position mark, a departure point mark, a destination mark, a guidance route, and a destination setting screen. And character information. In addition, the image information generation unit 108 is connected to an image information display unit 110 configured by, for example, a liquid crystal monitor, and displays image information and character information from the image information generation unit 108 based on commands from the navigation controller 105. To do. The audio information generation unit 109 is connected to an audio information output unit 111 such as a speaker, for example, and generates various audio data based on an instruction from the navigation controller 105 and outputs the generated audio data to the audio information output unit 111.

  Next, FIG. 3 shows a flowchart of a disaster crisis avoiding operation routine executed by the navigation controller 105 according to the first embodiment. Here, the disaster crisis avoidance operation routine is an operation that is executed when the host vehicle receives a radio signal including emergency information for notifying a disaster while traveling using the navigation device 100, and is a normal route guidance. Even during operation, the driver can be preferentially activated even when the driver is traveling without using the navigation device 100. In the disaster crisis avoidance operation routine, the navigation controller 105 first determines whether or not the above-mentioned emergency information has been received by the radio wave receiving means 101 (step S101). If it is determined in step S101 that emergency information has not been received, the routine is terminated as it is, that is, the current operation of the navigation device 100 is maintained. If it is determined in step S101 that emergency information has been received, warning data indicating that emergency information has been received is generated in the image information generation unit 108 and the audio information generation unit 109, and the image information display unit 110 and the audio information output unit 111 A command to output is issued (step S102). At this time, the warning data may be one that warns only the reception of the emergency information, or may be one obtained by converting the contents of the emergency information into character information and voice information. Subsequently, the navigation controller 105 determines whether or not the navigation device 100 is performing a route guidance operation at the current time (step S103). If it is determined in step S103 that the navigation device 100 is not in the route guidance operation, the warning display executed in step S102 is maintained as it is, and the routine is terminated. On the other hand, if it is determined in step S103 that the navigation device 100 is performing a route guidance operation, it is determined whether or not a keyword is included in the received emergency information (step S104). Here, the keywords represent words representing disasters such as “earthquake”, “volcanic eruption”, “tsunami”, “fire”, and positions such as “place name”, “road name”, “intersection name”, etc. When the received emergency information is represented by text information, it is determined, for example, by searching for the keyword from text information. Further, even when the received emergency information is represented by voice information, it can be determined by adding an operation for converting the voice information into character information. If it is determined in step S104 that no keyword is included in the emergency information, it is determined that there is no danger around the host vehicle, and the routine is ended as it is.

  On the other hand, when it is determined in step S104 that the keyword is included in the emergency information, the navigation controller 105 specifies the current own vehicle position by the GSP signal receiving unit 102 and also from the database 107 around the own vehicle position. Hazard map is read out (step S105), and a predicted dangerous place assumed from a disaster corresponding to the received emergency information is determined and displayed on the image information display unit 110 in the vicinity of the route to the currently guided destination. (Step S106). Subsequently, the navigation controller 105 determines whether or not the predicted dangerous point determined in step S105 is included in the currently guided route (step S107). If the predicted dangerous point is not included in the guidance route in step S107, it is determined that the current guidance route is safe, the guidance operation is continued with the current guidance route (step S108), and the routine is terminated. To do. On the other hand, when it is determined in step S107 that the predicted dangerous place is included in the guidance route, a safe guidance route that can avoid the predicted dangerous place is searched based on the map data and the hazard map (step S109). The guidance operation is resumed with the searched safety guidance route (step S110), and the routine is terminated.

  Next, an example in which the route guidance method based on the disaster crisis avoidance operation routine shown in FIG. 3 is actually applied will be described. FIG. 4 is a display example of the image information display unit 110 during execution of the disaster crisis avoidance operation routine according to the first embodiment. When driving by route guidance of the navigation device 100, as shown in FIG. 4A, guidance is provided along the guidance route R1 to the destination. Here, for example, when emergency information indicating that an earthquake has occurred in a neighboring area is received, character information W101 notifying the driver that emergency information has been received is obtained in step S102 of the disaster crisis avoidance operation routine shown in FIG. Is displayed. At this time, since the urgent information includes the name of the neighboring area, the operation from step S105 to step S106, for example, the predicted danger point D1 where the danger of landslide is assumed and the predicted danger where the danger of tsunami is assumed The location D2 is displayed on the screen.

  Subsequently, since the guidance route R1 shown in FIG. 4 (a) is included in a part of the predicted dangerous spots D1 and D2, the predicted dangerous spots D1 and D2 can be avoided by the operation from step S107 to step S110. The guidance route is searched again, and as shown in FIG. 4B, the new safety guidance route R2 and the character information W102 that informs the driver of the guidance resumption by the safety guidance route are displayed, and the guidance operation is resumed.

  By adopting the configuration and operation as described above, the route guidance method according to the first embodiment and the navigation device 100 using the route guidance method include a keyword and a database included in the emergency information when a disaster occurs and emergency information is received. In order to determine the predicted dangerous point based on the hazard map stored in 107, and to search again for a safety guidance route that can avoid the predicted dangerous point and to continue the guidance operation, the disaster and the associated risk Therefore, it is possible to perform the guiding operation while ensuring the safety of the passenger of the vehicle.

  Next, a second embodiment of the present invention will be described. FIG. 5 is a block diagram illustrating the configuration of the navigation device 200 according to the second embodiment. The navigation device 200 includes a radio wave receiving unit 201, a GPS signal receiving unit 202, an operation input unit 203, a control unit 204, and a database 207. The control unit 204 includes a navigation controller 205, a memory 206, an image information generation unit 208, and an audio information generation unit 209. The navigation controller 205 is connected to the memory 206, the database 207, the image information generation unit 208, and the audio information generation unit 209, and controls the operation of the control unit 204 and the entire navigation apparatus 200. Since the configuration and operation of the navigation device 200 and each component described above are the same as those shown in FIG. 2 of the first embodiment, description thereof is omitted here.

  Based on the drawing data output from the navigation controller 205, the image information generation unit 208 displays image information such as a map image around the host vehicle, a vehicle position mark, a departure point mark, a destination mark, a guidance route, and a destination setting screen. And character information. Further, the image information generation unit 208 is connected to an image information display unit 210 configured by, for example, a liquid crystal monitor, and displays image information and character information from the image information generation unit 208 based on a command from the navigation controller 205. To do. The audio information generation unit 209 is connected to an audio information output unit 211 such as a speaker, for example, and generates various audio data based on an instruction from the navigation controller 205 and outputs the generated audio data to the audio information output unit 211.

  Next, FIG. 6 shows a flowchart of a disaster crisis avoiding operation routine executed by the navigation controller 205 according to the second embodiment. Here, this disaster crisis avoidance operation routine is an operation that is executed when the host vehicle receives a radio signal including emergency information for notifying a disaster while traveling using the navigation device 200, and is a normal route guidance. Even during operation, the driver can be preferentially activated even when the driver is traveling without using the navigation device 200. In the disaster crisis avoidance operation routine, the navigation controller 205 first determines whether or not the above-mentioned emergency information has been received by the radio wave receiving means 201 (step S201). If it is determined in step S201 that emergency information has not been received, the routine is terminated as it is, that is, the current operation of the navigation device 200 is maintained. If it is determined in step S201 that emergency information has been received, warning data indicating that emergency information has been received is generated in the image information generation unit 208 and the audio information generation unit 209, and the image information display unit 210 and the audio information output unit 211 A command to output is issued (step S202). At this time, the warning data may be one that warns only the reception of the emergency information, or may be one obtained by converting the contents of the emergency information into character information and voice information. Subsequently, the navigation controller 205 specifies the current host vehicle position by the GSP signal receiving means 202, reads out a hazard map around the host vehicle position from the database 207 (step S203), and returns to the currently guided destination. In the vicinity of the route, a predicted dangerous point assumed from a disaster or the like corresponding to the received emergency information is determined and displayed on the image information display unit 210 (step S204). Next, the navigation controller 205 outputs to the image information display unit 210 a display for causing the driver to select whether to change from the current guidance route, that is, whether to perform a reroute operation (step S205).

  Subsequently, the navigation controller 205 waits until the passenger or driver inputs the above selection result using the input operation means 203, and determines whether or not the input selection result is rerouted (step S206). ). If it is determined in step S206 that the route not to be rerouted is selected, the guidance is continued with the guidance route being guided at the current time (step S207), and the routine is terminated. On the other hand, if it is determined in step S206 that the route to be rerouted is selected, a safety guidance route that can avoid the predicted dangerous point is searched based on the map data and the hazard map (step S208), and the newly searched safety guidance is searched. The guidance operation is resumed on the route (step S209), and the routine is terminated.

  Next, an example in which the route guidance method based on the disaster crisis avoidance operation routine shown in FIG. 6 is actually applied will be described. 7 and 8 are display examples of the image information display unit 210 during execution of the disaster crisis avoidance operation routine according to the second embodiment. When driving by route guidance of the navigation device 200, as shown in FIG. 7A, guidance is provided along the guidance route R1 to the destination. Here, for example, when emergency information indicating that an earthquake has occurred in a neighboring area is received, character information W201 that informs the driver that emergency information has been received is obtained in step S202 of the disaster crisis avoidance operation routine shown in FIG. Is displayed. At this time, since the urgent information includes the name of the neighboring area, the operation from step S203 to step S204 is performed, for example, the predicted danger point D1 where the danger of landslide is assumed and the predicted danger where the danger of tsunami is assumed. Character information W202 notifying the location D2 and the contents of a series of operations is displayed on the screen.

  Subsequently, as shown in FIG. 8A, character information W203 for determining whether or not to select a reroute according to the information given by the passenger or driver in step S205 is displayed. In response to this display, when the passenger or driver selects, for example, the reroute operation, the route from step S208 to step S209 is searched again for a guidance route that can avoid the predicted dangerous spots D1 and D2, and FIG. As shown, the new safety guidance route R2 and the character information W204 that informs the driver of guidance resumption by the safety guidance route are displayed, and the guidance operation is resumed.

  By adopting the configuration and operation as described above, the route guidance method according to the second embodiment and the navigation apparatus 200 using the route guidance method include a keyword and a database included in the emergency information when a disaster occurs and emergency information is received. The predicted dangerous point is determined based on the hazard map stored in 207, the predicted dangerous point is displayed, the passenger or the driver is selected whether to change the guidance route, and the reroute operation is performed. In order to continue the guidance operation by re-searching the safety guidance route that can avoid the predicted danger point, the vehicle will reflect the intention of the passenger of the vehicle, and the vehicle will It is possible to perform the guiding operation while ensuring the safety of the passenger.

  In FIG. 5, the operation input unit 203 and the image information display unit 210 are configured independently. However, the operation input unit can be incorporated into the image information display unit by using, for example, a touch panel method. is there.

  Next, Embodiment 3 of the present invention will be described. FIG. 9 is a block diagram illustrating the configuration of the navigation device 300 according to the third embodiment. The navigation device 300 includes a radio wave reception unit 301, a GPS signal reception unit 302, an operation input unit 303, a wireless line communication unit 312, a control unit 304, and a database 307. The radio wave receiving unit 301 is a receiver that receives VICS information or radio waves such as FM multiplex broadcasting and digital broadcasting. The GPS signal receiving unit 302 is a receiver that receives position information of the host vehicle from GPS satellites. The operation input unit 303 is an operation unit provided with various operation keys and the like for operating the control unit 304, and may be provided on the surface of the control unit 304. The wireless line communication unit 312 is, for example, a computer that can be connected to an Internet line and execute various data communications. The radio wave receiving unit 301, the GPS signal receiving unit 302, and the wireless line communication unit 312 are electrically connected to the navigation controller 305 of the control unit 304. In addition to the case where the operation input unit 303 is provided on the surface of the apparatus main body, the operation input unit 303 may be connected to the navigation controller 305 as an independent operation unit so as to be able to communicate with the navigation controller 305 by wire or wirelessly. The database 307 is composed of, for example, a hard disk, a DVD-RW, etc., and is necessary for route guidance, for example, a map data file storing map information, an intersection data file storing information related to intersections, road types, starting points of roads, Road data files that store information about roads such as end points, node data files that store east longitude and north latitude coordinates at one point on the road, facilities according to the purpose of use classified into genres such as gas stations and convenience stores, etc. A guide point data file and the like storing the position coordinates of the feature object and the guide information related to the feature object are stored. In addition to the above-described data file, the database 307 also includes a so-called hazard map such as a predicted danger area where a danger such as a tsunami, flood, or landslide is expected to occur according to the topography and climate on the map. I remember it.

  The control unit 304 includes a navigation controller 305, a memory 306, an image information generation unit 308, and an audio information generation unit 309. The navigation controller 305 is connected to the memory 306, the database 307, the image information generation unit 308, and the audio information generation unit 309, and controls operations of the control unit 304 and the entire navigation apparatus 300. The memory 306 temporarily stores information received by the radio wave reception unit 301 and the GPS signal reception unit 302, information obtained via the wireless line communication unit 312 and information necessary for control by the control unit 304. . The memory 106 also stores various programs that operate the navigation controller 305.

  Based on the drawing data output from the navigation controller 305, the image information generation unit 308 includes image information such as a map image around the host vehicle, a vehicle position mark, a departure point mark, a destination mark, a guidance route, and a destination setting screen. And character information. The image information generation unit 308 is connected to an image information display unit 310 configured by, for example, a liquid crystal monitor, and displays image information and character information from the image information generation unit 308 based on commands from the navigation controller 305. To do. The audio information generation unit 309 is connected to an audio information output unit 311 such as a speaker, for example, and generates various audio data based on an instruction from the navigation controller 305 and outputs it to the audio information output unit 311.

  Next, FIG. 10 shows a flowchart of the disaster crisis avoidance operation routine executed by the navigation controller 305 according to the third embodiment. Here, the disaster crisis avoidance operation routine is an operation that is executed when the own vehicle receives a radio signal including emergency information for notifying a disaster while traveling using the navigation device 300, and is a normal route guidance. Even during operation, the driver can be preferentially activated even when the driver is traveling without using the navigation device 300. In the disaster crisis avoidance operation routine, the navigation controller 305 first determines whether or not the above-described emergency information has been received by the radio wave reception means 301 (step S301). If it is determined in step S301 that emergency information has not been received, the routine is terminated as it is, that is, the current operation of the navigation device 300 is maintained. When it is determined in step S301 that emergency information has been received, warning data indicating that emergency information has been received is generated in the image information generation unit 308 and the audio information generation unit 309, and the image information display unit 310 and the audio information output unit 311 A command to output is issued (step S302). At this time, the warning data may be one that warns only the reception of the emergency information, or may be one obtained by converting the contents of the emergency information into character information and voice information. Subsequently, the navigation controller 305 determines whether or not the navigation device 300 is performing a route guidance operation at the current time (step S303). If it is determined in step S303 that the navigation device 300 is not performing a route guidance operation, the warning display executed in step S302 is maintained as it is, and the routine is terminated. On the other hand, if it is determined in step S303 that the navigation device 300 is performing a route guidance operation, it is determined whether or not a keyword is included in the received emergency information (step S304). Here, the keywords represent words representing disasters such as “earthquake”, “volcanic eruption”, “tsunami”, “fire”, and positions such as “place name”, “road name”, “intersection name”, etc. When the received emergency information is represented by text information, it is determined, for example, by searching for the keyword from text information. Further, even when the received emergency information is represented by voice information, it can be determined by adding an operation for converting the voice information into character information. If it is determined in step S304 that no keyword is included in the emergency information, it is determined that there is no danger in the vicinity of the host vehicle, and the routine is ended as it is.

  On the other hand, when it is determined that the keyword is included in the emergency information in step S304, the navigation controller 305 specifies the current host vehicle position by the GSP signal receiving unit 302 and also via the wireless line communication unit 312. To obtain real-time disaster information around the host vehicle (step S305). Here, the real-time disaster information is, for example, disaster information published on the homepage on the Internet by a local government in the region around the vehicle, the vehicle, or a general company. You can access the appropriate website and get the information you need. At this time, if there are a plurality of information acquisition destinations, the fact can be displayed on the image information display unit 310 to allow the passenger or driver to select the information acquisition destination. Subsequently, the navigation controller 305 receives the emergency information received in the vicinity of the route to the currently guided destination based on the hazard map around the own vehicle position stored in the database 107 and the latest real-time disaster information. A predicted dangerous place assumed from a disaster corresponding to the above is determined and displayed on the image information display unit 310 (step S306). Next, the navigation controller 305 determines whether or not the predicted dangerous location determined in step S305 is included in the currently guided route (step S307). If the predicted route is not included in the guidance route in step S307, it is determined that the current guidance route is safe, the guidance operation is continued with the current guidance route (step S308), and the routine is terminated. To do. On the other hand, when it is determined in step S307 that a predicted dangerous place is included in the guidance route, a safe guidance route that can avoid the predicted dangerous place is searched based on real-time disaster information, map data, and a hazard map (step S309). ) The guidance operation is resumed with the newly searched safety guidance route (step S310), and the routine is terminated.

  Next, an example in which the route guidance method based on the disaster crisis avoidance operation routine shown in FIG. 10 is actually applied will be described. FIG. 11 is a display example of the image information display unit 310 during execution of the disaster crisis avoidance operation routine according to the third embodiment. When driving by route guidance of the navigation device 300, as shown in FIG. 11A, guidance is provided along the guidance route R1 to the destination. Here, for example, when emergency information indicating that an earthquake has occurred in a neighboring area is received, character information W301 informing the driver that emergency information has been received is obtained in step S302 of the disaster crisis avoidance operation routine shown in FIG. Is displayed. At this time, since the emergency information includes a neighboring area name, real-time disaster information is obtained through the wireless line communication means 312 by the operation of step S305, and character information W302 notifying the real-time disaster information is displayed in the image information display section. 310 is displayed. Subsequently, by the operation of step S306, for example, a predicted dangerous place is displayed on the screen, similarly to the one shown in FIG.

  Subsequently, for example, in the case of the predicted dangerous place shown in FIG. 4A, it is determined that the guidance route R1 is included in a part of the predicted dangerous place. Therefore, the operation of steps S307 to S310 is performed. A search is again made for a guidance route that can avoid the location, and as shown in FIG. 11 (b), a new safety guidance route R2 and character information W303 that informs the driver of guidance resumption by the safety guidance route are displayed, and the guidance operation resumes Is done.

  With the configuration and operation as described above, the route guidance method according to the third embodiment and the navigation apparatus 300 using the route guidance method can be obtained from the wireless line communication unit 312 when a disaster occurs and emergency information is received. Based on the real-time disaster information and the hazard map stored in the database 307, a predicted dangerous point is determined, and a safety guidance route that can avoid the predicted dangerous point is searched again to continue the guidance operation. Depending on the information, it is possible to perform a guidance operation while ensuring the safety of the vehicle occupant from the disaster and the associated danger.

  The real-time disaster information obtained from the wireless line communication means 312 may include the latest hazard map information in addition to information on the location and scale of the disaster. By obtaining such information, it is possible to perform a guidance operation while ensuring the safety of the passenger based on more accurate and appropriate information. Moreover, the above-mentioned real-time disaster information may further include traffic jam information induced by the disaster. By obtaining such information, it is possible to prompt the driver to determine whether or not the vehicle can be moved as it is when a disaster occurs.

  From the above embodiments, according to the present invention, when disaster information is received by the radio wave receiving means at the time of occurrence of a disaster, the vehicle information is specified by the GPS signal receiving means, and the map information and the hazard map stored in the database are stored. Based on the above, the safety guidance route that avoids the predicted dangerous place where the danger related to the disaster is assumed is re-searched and the route guidance is performed, so the safety of the vehicle passenger is ensured from the disaster and the associated danger However, it is possible to provide a route guidance method capable of performing the guidance operation. In addition, by using the route guidance method described above, it is possible to provide a navigation device that can perform a guidance operation while ensuring the safety of the vehicle occupant from the disaster and the associated danger.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims.・ Change is possible. For example, the navigation device and route guidance method described in the second embodiment and the navigation device and route guidance method described in the third embodiment may be used independently or in combination.

It is a block diagram which shows the structure of the evacuation method at the time of disaster occurrence in a prior art. 1 is a block diagram illustrating a configuration of a navigation device 100 according to a first embodiment. 3 is a flowchart of a disaster crisis avoidance operation routine according to the first embodiment. 6 is a display example of the image information display unit 110 during execution of a disaster crisis avoidance operation routine according to the first embodiment. It is a block diagram which shows the structure of the navigation apparatus 200 by the present Example 2. FIG. 10 is a flowchart of a disaster crisis avoidance operation routine according to the second embodiment. It is a display example of the image information display unit 210 during execution of the disaster crisis avoidance operation routine according to the second embodiment. It is a display example of the image information display unit 210 during execution of the disaster crisis avoidance operation routine according to the second embodiment. It is a block diagram which shows the structure of the navigation apparatus 300 by the present Example 3. 12 is a flowchart of a disaster crisis avoidance operation routine according to the third embodiment. It is a display example of the image information display unit 310 during execution of the disaster crisis avoidance operation routine according to the third embodiment.

Explanation of symbols

100, 200, 300 Navigation device 101, 201, 301 Radio wave receiving means 102, 202, 302 GPS signal receiving means 103, 203, 303 Operation input means 104, 204, 304 Control unit 105, 205, 305 Navigation controller 107, 207, 307 Database 110, 210, 310 Image information display unit 111, 211, 311 Audio information output unit 312 Radio channel communication means D1, D2 Predicted risk location R1 Guide route R2 Safety guide route

Claims (7)

When emergency information is received at the time of disaster occurrence, a navigation device that performs guidance route guidance operations while ensuring the safety of passengers of the host vehicle,
The navigation device includes a control unit that includes a receiving unit that receives the emergency information and a GPS signal receiving unit that receives a GPS signal that identifies the position of the host vehicle, the map information and the received emergency information. And a database having information on predicted dangerous places where danger is assumed,
The control unit includes a navigation controller, an image information display unit that displays drawing data based on the database according to a command from the navigation controller, and a voice that presents voice information to the passenger according to a command from the navigation controller An information output unit,
The navigation controller identifies the predicted dangerous location related to the route to the destination based on the host vehicle position and the predicted dangerous location data, and based on the own vehicle position and the predicted dangerous location. A navigation device characterized by searching for a safety guidance route capable of avoiding a predicted danger point.   The control unit further includes a wireless line communication unit, and the navigation controller obtains real-time disaster information using the wireless line communication unit, and is based on the data of the host vehicle, the predicted dangerous location, and the real-time disaster information. The navigation apparatus according to claim 1, wherein the predicted dangerous place around the host vehicle is specified.   3. The navigation device according to claim 1 or 2, wherein the navigation device further includes operation input means, and the passenger can select whether to search for the safety guidance route using the operation input means. Navigation device. A route guidance method for performing guidance operation of a guidance route while ensuring the safety of a passenger of the own vehicle using a navigation device when emergency information is received when a disaster occurs,
The navigation device includes a control unit that includes a receiving unit that receives the emergency information and a GPS signal receiving unit that receives a GPS signal that identifies the position of the host vehicle, the map information and the received emergency information. And a database having information on predicted dangerous places where danger is assumed,
Based on the vehicle position and the data of the predicted dangerous spot, a predicted dangerous spot specifying step for specifying the predicted dangerous spot related to the route to the destination;
A search step for searching for a safety guidance route capable of avoiding the predicted dangerous place based on the own vehicle position and the position of the predicted dangerous place;
A route guidance method comprising: The control unit is provided with wireless line communication means, and further includes an information communication step of acquiring real-time disaster information using the wireless line communication means,
5. The predicted risk location specifying step specifies the predicted risk location around the host vehicle based on the host vehicle, the predicted risk location data, and the real-time disaster information. The route guidance method described.   The control unit is provided with an operation input means, and a selection step for selecting whether or not the occupant searches for the safety guidance route using the operation input means after the predictive danger point specifying step. The route guidance method according to claim 4, further comprising: The route guidance method according to any one of claims 4 to 6, further comprising a warning step that warns the urgent information to the passenger as character information or voice information.

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