JP2022106042A - Electronic device and guidance system - Google Patents

Abstract

To provide an electronic device that allows a mobile terminal side to come to continue guidance of a guide route quickly after a vehicle becomes difficult to travel.SOLUTION: An on-vehicle device 100 of the present invention is configured to: when detecting emergency via an emergency warning broadcast and the like, search for a guide route to an evacuation place; and guide the guide route. When an own vehicle is determined to be difficult to travel during guidance of the guide route, the on-vehicle device 100 is configured to: transmit guide route information to a mobile terminal 200; automatically set the guide route based on the guide route information the mobile terminal 200 receives; and make it possible to perform the guidance of the guide route.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electronic device mounted on a moving body such as a vehicle, and more particularly to an electronic device capable of transferring a guidance path searched by a navigation function to the outside.

A navigation device that displays an evacuation site when receiving an emergency warning broadcast or the like, searches for a route to the evacuation site, and guides the evacuation site is known. For example, when the vehicle information providing device of Patent Document 1 receives disaster information, it searches for a destination to be an evacuation destination based on the position of the own vehicle, and searches for a route suitable for walking from the position of the own vehicle to the destination. The technology to be provided is disclosed. The navigation device of Patent Document 2 discloses a technique for guiding a user to an evacuation candidate site and a candidate route when a large tsunami warning is issued. Further, the navigation device of Patent Document 3 transmits vehicle position information to the server when the ignition key of the vehicle is turned off, and then searches the server for a route from the user's current position to the vehicle's current position. It discloses a technology for delivering guidance routes to users' mobile terminals.

Japanese Unexamined Patent Publication No. 2007-292646 Japanese Unexamined Patent Publication No. 2013-08924 Japanese Unexamined Patent Publication No. 2006-145442

In an emergency such as the occurrence of a tsunami, for example, as shown in Patent Document 1, the navigation device can search for a guidance route to the evacuation site in response to receiving an emergency warning broadcast and guide the evacuation site. Is. However, if it becomes difficult to drive due to an abnormality in the vehicle (for example, submersion, puncture, etc.) while driving to the evacuation site, the user must escape from the vehicle and evacuate to an evacuation site such as a hill by himself / herself. Must be. If the user does not know the guidance route to the evacuation site, the user can check the route to the evacuation site again with his / her own mobile terminal, or reset the guidance route to the evacuation site on the mobile terminal side to guide the route. I need to guide you. However, in a situation where the moment is competing, evacuation may be delayed due to operations such as setting a guidance route on the mobile terminal, and there is a possibility of being involved in a disaster.

On the other hand, the navigation device of Patent Document 3 automatically transfers the destination information to the mobile terminal when arriving at the parking lot, and guides the route to the own vehicle in the parking lot on the mobile terminal side after the ACC off is detected. Therefore, it does not correspond to the case where it becomes difficult to drive due to an abnormality of the vehicle or the like. In many cases, the timing of occurrence of an abnormality in a vehicle or the like is other than in a parking lot, and in such a case, the navigation device of Patent Document 3 does not transfer the guidance route to the mobile terminal. For this reason, the user has to reset or search for the destination or the guidance route on the mobile terminal side, and this work may delay evacuation and may be involved in a disaster.

An object of the present invention is to solve such a conventional problem and to provide an electronic device and a guidance system capable of promptly continuing guidance of a guidance route to a mobile terminal when the vehicle is difficult to travel. ..

The electronic device according to the present invention has a navigation function, and includes a search means for searching a guidance route based on a set destination and a guidance means for guiding the guidance route searched by the search means. , The acquisition means for acquiring the situation information indicating the situation of the own vehicle, the determination means for determining whether or not the own vehicle is difficult to travel based on the situation information, and the determination means for determining that the own vehicle is difficult to travel. In this case, a transmission means for transmitting the guidance route information regarding the guidance route to the mobile terminal is provided.

In certain embodiments, the guidance route information includes at least one evacuation site as a destination and a guidance route to the evacuation site. In one embodiment, the search means re-searches for a walking guidance route when the determination means determines that the vehicle is difficult to travel, and the transmission means guides the re-searched guidance route. Send route information. In one embodiment, the search means re-searches for a guidance route to an evacuation site within a certain distance from the current position when the determination means determines that the vehicle is difficult to travel. In one embodiment, the search means re-searches for a guidance route destined for an evacuation site that can be reached within the tsunami arrival time. In one embodiment, the determination means determines that the vehicle is difficult to drive when any of the collision, submersion, stack, or puncture of the vehicle is detected based on the situation information. In one embodiment, the mobile terminal is brought into the vehicle. In one embodiment, the search means searches for a guidance route to an evacuation site in response to receiving disaster warning information from the outside.

The guidance system according to the present invention includes the above-mentioned electronic device and the mobile terminal, and the mobile terminal is an object based on a receiving means for receiving the guidance route information and the received guidance route information. It includes a setting means for setting a guidance route to the ground and a guidance means for guiding the set guidance route.

According to the present invention, when it is determined that it is difficult for the own vehicle to travel, the guidance route information regarding the guidance route is transmitted to the mobile terminal. Therefore, the destination or the destination or the guidance route information received on the mobile terminal side is transmitted. The guidance route can be set automatically. As a result, after escaping from the own vehicle, the user can quickly obtain the guidance of the automatically set guidance route without performing the operation of resetting the destination or the guidance route on the mobile terminal.

It is a figure which shows the outline of the guidance system which concerns on embodiment of this invention. It is a block diagram which shows the structural example of the in-vehicle device which concerns on embodiment of this invention. It is a figure which shows the structure of the guidance function to the evacuation place which concerns on embodiment of this invention. It is a table exemplifying a difficult-to-run case and its detection method. It is a block diagram which shows the structural example of the mobile terminal which concerns on embodiment of this invention. It is a block diagram which shows the structure of the automatic setting function of the guidance path which concerns on embodiment of this invention. It is a figure which shows the flow of the guidance operation to the evacuation place which concerns on embodiment of this invention.

Next, an embodiment of the present invention will be described. The electronic device according to the present invention is mounted on a moving body such as an automobile or a motorcycle and has a navigation function. The electronic device according to the present invention is not particularly limited, but is, for example, an in-vehicle device equipped with a navigation / audio / visual function, a multifunctional mobile phone (smartphone), a portable information terminal (tablet computer, laptop computer, notebook). It can be a type computer) or the like.

FIG. 1 is a diagram showing a configuration example of a guidance system according to an embodiment of the present invention. The vehicle M is equipped with a telematics control unit 10 (hereinafter referred to as TCU) as an example of a communication module. The TCU 10 is connected to the in-vehicle device 100 mounted on the vehicle M or the mobile terminal 200 brought into the vehicle by wire or wirelessly. Further, the in-vehicle device 100 and the mobile terminal 200 are connected to each other by short-range wireless communication or the like.

The TCU 10 receives a GPS signal from a GPS satellite 14 via an antenna 12, connects to an external hotspot 16 via WiFi (wireless LAN), or a mobile phone communication network or network such as 3G / 4G / 5G. It is a composite communication unit that can be connected to a server 18, another mobile terminal 20, an electronic device 22 (including an in-vehicle device mounted on another vehicle), or the like via the above.

By using TCU10, the current position of vehicle M can be calculated from GPS signals, road map data and its update data, software updates, application software, disaster warnings such as earthquakes and tsunamis from cloud servers on the Internet. , Download traffic information, weather information, online videos, music data, etc., automatically make an emergency call using the mobile phone communication network when an accident occurs (e-Call), and make vehicle-to-vehicle communication. It becomes possible to do. As a result, the contents that can be used in the in-vehicle device 100 and the mobile terminal 200 are significantly expanded.

FIG. 2 is a block diagram showing a configuration example of the in-vehicle device 100 of this embodiment. The in-vehicle device 100 includes, for example, an input unit 110, a position calculation unit 120, a navigation unit 130, a communication unit 140, a display unit 150, a voice output unit 160, a storage unit 170, a vehicle information acquisition unit 180, and a control unit 190. Will be done.

The input unit 110 receives an instruction from the user by means of an input key device, a voice input recognition device, a touch panel, or the like, and provides the instruction to the control unit 190. The position calculation unit 120 calculates the current location of the vehicle using GPS signals and / or a gyro sensor, an acceleration sensor, or the like. The navigation unit 130 causes the display unit 150 to display a road map around the position of the own vehicle based on the current location calculated by the position calculation unit 120, or searches for a route to the destination. Further, as will be described later, in the event of an emergency such as a disaster, the navigation unit 130 searches for a guidance route with the evacuation site as the destination, and guides the guidance route via the display unit 150 and the voice output unit 160.

The communication unit 140 includes a communication module such as the TCU 10 shown in FIG. 1, and enables various communications via the TCU 10. However, the TCU 10 is an example, and communication with the outside may be performed by a communication module other than this. The communication unit 140 also enables data communication with one or more mobile terminals 200 brought into the vehicle. The connection method is not particularly limited, but for example, the mobile terminal 200 is connected to the in-vehicle device 100 by short-range wireless communication. When the mobile terminal 200 has been connected in the past, the communication unit 140 may collate the identification information of the mobile terminal 200 with the connection history information and automatically connect the mobile terminal 200. The mobile terminal 200 is a multifunctional communication terminal such as a smartphone or a tablet PC. The in-vehicle device 100 outputs, for example, image data and audio data output from the mobile terminal 200, and enables hands-free calling when there is an incoming call to the mobile terminal 200. Further, as will be described later, when it is determined that the vehicle M is difficult to travel, the in-vehicle device 100 transfers the guidance route information by the navigation unit 130 to the mobile terminal 200 via the communication unit 140.

The display unit 150 includes a liquid crystal display, an organic EL display, and the like, and displays, for example, road map data generated by the navigation unit 130 and image data downloaded via the TCU 10. Further, although not shown here, when the in-vehicle device 100 has a multimedia reproduction function and a television reception function, the image data thereof is displayed on the display unit 150.

The voice output unit 160 outputs voice such as guidance of the guidance route generated by the navigation unit 130, and outputs voice data downloaded via the TCU 10. Further, although not shown here, when the in-vehicle device 100 has a multimedia reproduction function and a television reception function, those audio data are output from the audio output unit 160.

The storage unit 170 can store application software and programs executed by the control unit 190, road map data required by the navigation unit 130, and the like. However, the road map data may be downloaded from the server via the TCU 10.

The vehicle information acquisition unit 180 acquires various information regarding the situation of the vehicle M. The vehicle information acquisition unit 180 includes, for example, a control signal generated by the engine control unit ECU via an in-vehicle network and various sensors mounted on the vehicle M (for example, an obstacle detection sensor, a water detection sensor, a vehicle speed sensor, a temperature sensor, etc.). It is detected by an acceleration sensor, gyro sensor, airbag sensor, etc.) and the detection result is acquired. Further, when the vehicle M is equipped with an image pickup camera for taking an image of the surroundings of the vehicle M, the image data captured by the image pickup camera may be acquired.

The control unit 190 controls the operation of each unit of the vehicle-mounted device 100. This control is performed by hardware and / or software. In some embodiments, the control unit 190 includes a microcontroller or the like that includes a ROM / RAM or the like, the ROM / RAM storing various programs for controlling the vehicle-mounted device 100. In this embodiment, the control unit 190 has a driving support function for assisting the driver's driving, but here, details of the guidance function to the evacuation site in an emergency included as a part of the driving support function. Will be explained.

FIG. 3 is a block diagram showing a configuration of a guidance function to an evacuation site according to this embodiment. The guidance function 300 to the evacuation site includes an emergency detection unit 310, a guidance route search unit 320, a guidance route guidance unit 330, a travel difficulty determination unit 340, and a guidance route information transmission unit 350.

The emergency detection unit 310 detects emergency situations such as earthquakes, tsunamis, fires, typhoons, river floods, and landslides. The detection method is not particularly limited, but for example, an emergency warning delivered from a server or the like via the TCU 10 may be received, an emergency warning broadcast may be received from a television / radio receiver (omitted in FIG. 2), or the detection method may be received. When receiving an emergency warning transmitted from another vehicle by vehicle-to-vehicle communication, the emergency detection unit 310 detects an emergency situation. Of course, in addition to this, the emergency situation may be detected in response to the user instructing the emergency situation via the input unit 110.

When an emergency is detected by the emergency detection unit 310, the guidance route search unit 320 searches for a guidance route with the evacuation site as the destination in cooperation with the navigation unit 130. The navigation unit 130 searches for the nearest evacuation site from the current position of the vehicle M calculated by the position calculation unit 120, and searches for a route with this as the destination. The evacuation site may be a pre-registered point, or if such a point cannot be found within a certain range, a highly safe park, hill, playground, facility, or the like may be used as the evacuation site.

When the guidance route to the evacuation site is searched by the guidance route search unit 320, the guidance route guidance unit 330 forcibly terminates the guidance route guidance unit 330 if the navigation unit 130 is in the process of providing another route guidance. , The navigation unit 130 is guided to the guidance route to the evacuation site. The display unit 150 displays a map screen including a guidance route to the evacuation site, and the voice output unit 160 guides the guidance route.

The traveling difficulty determination unit 340 determines whether or not the vehicle M has become difficult to travel based on the information regarding the vehicle status acquired by the vehicle information acquisition unit 180 during the guidance of the guidance route to the evacuation site. FIG. 4 shows an example of a case where the vehicle is difficult to drive and a detection method thereof. For example, while traveling on the guidance route, the vehicle M may collide with some obstacle, making it difficult to travel. The presence or absence of a vehicle collision is detected, for example, by obstacle sensors, acceleration sensors, airbag operation, and image data from an imaging camera, and the driving difficulty determination unit 340 determines whether or not driving is difficult based on these detection results. .. For example, when the obstacle sensor detects that the vehicle has collided with an obstacle and the acceleration at that time is above a certain level, the airbag is activated, or the image data predicts a large damage to the vehicle. Is determined to be difficult to drive due to a collision.

Further, while traveling on the guidance route, the vehicle M may be inundated with water accumulated in a flood of a river or a depression of a sloping road, which may make traveling difficult. The presence or absence of flooding is detected, for example, by a submersion sensor (water level gauge) that detects whether or not the vehicle has been submerged, image data that captures water around the vehicle, and the like. The traveling difficulty determination unit 340 determines whether or not the vehicle has been submerged based on these detection results.

Further, while traveling on the guidance route, the vehicle M may get stuck due to sand, snow, or mud, making it difficult to travel. The presence or absence of a stack is detected, for example, by idling of the wheels or image data obtained by capturing the surroundings of the vehicle M. The traveling difficulty determination unit 330 determines whether or not the vehicle has been submerged based on these detection results. Further, while traveling on the guidance route, the tire may be flat and it may be difficult to drive. The running difficulty determination unit 340 determines that running is difficult due to a flat tire when the tire air pressure becomes equal to or lower than a certain level.

Note that FIG. 4 shows an example in which traveling becomes difficult mainly due to the vehicle, but in addition to this, traveling may become difficult due to the traveling environment. For example, roads may collapse or disappear due to earthquakes, avalanches, landslides, etc., bridges on roads may fall, or fires may occur, making driving difficult. In such a case, it may be determined that the traveling is difficult based on the image data captured by the image pickup camera.

Further, in one embodiment, when the traveling difficulty determination unit 340 determines that the traveling is difficult, the guidance route search unit 320 can re-search the guidance route to the evacuation site. In this case, the guidance route search unit 320 re-searches for a guidance route suitable for walking to the evacuation site, considering that the user goes to the evacuation site by walking after escaping the vehicle M. Furthermore, if it is too far to walk from the current position to the evacuation site, the evacuation site at a certain distance from the current position is searched again, and the guidance route to the re-searched evacuation site is searched again. You may try to do it.

If the in-vehicle device can obtain the tsunami arrival time from the warning information, the evacuation site on a hill is set as the destination based on the tsunami arrival time, but when it is determined that it is difficult for the vehicle M to continue traveling. , Reset the highly safe evacuation site that exists within the tsunami arrival time and within walking distance to the destination, and re-search the guidance route.

When the guidance route information transmission unit 350 determines that the vehicle M is difficult to travel by the travel difficulty determination unit 340, the guidance route information transmission unit 350 reaches the guidance route information or the evacuation site regarding the guidance route to the evacuation site searched by the guidance route search unit 320. The guidance route information regarding the re-searched guidance route is transmitted to the mobile terminal 200. The guidance route information includes link data that identifies the guidance route to the evacuation site and / or location information of the evacuation site (destination). In addition to this information, the guidance route information includes the arrival time at the evacuation site (the arrival time on foot when the guidance route is re-searched on foot) and the driving difficulty determination unit 340. It may include location information. After it is determined that the vehicle is difficult to travel, the user has a mobile terminal 200 that has received the guidance route information and escapes from the vehicle M.

Next, a typical configuration of the mobile terminal 200 is shown in FIG. The mobile terminal 200 includes an input unit 210, a communication unit 220, a display unit 230, a voice output unit 240, a position detection unit 250, a storage unit 260, a control unit 270, and the like.

The input unit 210 receives the input from the user and provides it to the control unit 270. The communication unit 220 enables short-range wireless communication with the in-vehicle device 100. In addition, the communication unit 220 enables communication with other mobile terminals, servers, and the like, voice communication, and the like via a public wireless network or network. The position detection unit 250 detects the current position of the smartphone by using, for example, a signal from a GPS satellite. The storage unit 260 stores programs, various application software, and the like.

The control unit 270 controls each unit including, for example, a microcontroller including a ROM / RAM, a microprocessor, and the like. The control unit 270 can also execute the application software stored in the storage unit 260. In this embodiment, when the control unit 270 receives the guidance route information to the evacuation site from the in-vehicle device 100, the control unit 270 automatically sets the guidance route to the evacuation site based on the received guidance route information and guides the guidance route. Has a function.

FIG. 6 is a block diagram showing a configuration of an automatic setting function of a guidance route mounted on the mobile terminal 200. The guidance route automatic setting function 400 includes a guidance route information receiving unit 410, a current position calculation unit 420, a guidance route automatic setting unit 430, and a guidance route guidance unit 440.

The guidance route information receiving unit 410 receives the guidance route information transmitted from the in-vehicle device 100 when it is determined that the vehicle is difficult to travel. When the current position calculation unit 420 receives the guidance route information, the current position calculation unit 420 calculates the current position of the mobile terminal 200 based on the detection result of the position detection unit 250. However, when the guidance route information includes the position information when it is determined that the vehicle is difficult to travel, it is not always necessary to calculate the current position of the mobile terminal 200 by using this position information.

The guidance route automatic setting unit 430 sets the guidance route with the evacuation site as the destination based on the current position calculation unit 420 and the received guidance route information. In one aspect, the mobile terminal 200 includes an application that executes a navigation function, and the guidance route automatic setting unit 430 automatically sets a guidance route in cooperation with the navigation function. In this case, when the guidance route information does not include the link data of the guidance route and includes the destination of the evacuation site, the guidance route automatic setting unit 430 guides the navigation function from the current position of the mobile terminal 200 to the evacuation site. The route is re-searched and the re-searched guidance route is set.

The guidance route guidance unit 440 guides the guidance route to the evacuation site set by the guidance route automatic setting unit 430. In one aspect, in cooperation with the navigation function, the display unit 230 displays a map screen including the guidance route, and the voice output unit 240 provides voice guidance for the guidance route. At this time, the arrival time at the evacuation site (when the guidance route is re-searched for walking, the arrival time by walking) is also displayed.

Next, the operation of the guidance system of this embodiment will be described with reference to the flow of FIG. As an example, one or more mobile terminals 200 of users are brought into the vehicle M, the connection between the mobile terminal 200 and the in-vehicle device 100 is established, and a disaster or the like is caused while the vehicle M is traveling. It is assumed that an emergency warning broadcast has been received to notify the occurrence of.

When an emergency is detected by the emergency detection unit 310 in response to the reception of the emergency warning broadcast (S100), the guidance route search unit 320 searches for an evacuation site in cooperation with the navigation unit 130, and the searched evacuation is performed. A guidance route with a place as a destination is searched, and the guidance route guidance unit 330 displays a road map screen including the searched guidance route on the display unit 150, and starts guidance of the guidance route (S110).

The traveling difficulty determination unit 340 monitors the status of the vehicle M acquired from the vehicle information acquisition unit 180 while guiding the guidance route to the evacuation site (S120), and determines whether or not the vehicle M is difficult to travel (difficulty traveling). S130). The traveling difficulty determination unit 340 determines that the vehicle is difficult to travel when, for example, an event that is difficult to travel as illustrated in FIG. 4 is detected. When it is determined that the vehicle is difficult to travel, the guidance route information transmission unit 350 transmits the guidance route information with the evacuation site as the destination to the mobile terminal 200 (S140). As described above, this guidance route information includes the evacuation site which is the destination, the position information when driving difficulty occurs, and all or a part of the guidance route to the evacuation site. Further, when the guidance route to the evacuation site for walking is re-searched, the guidance route information includes the re-searched evacuation site and the guidance route to the evacuation site.

In the mobile terminal 200, the guidance route information receiving unit 410 receives the transmitted guidance route information (S150). When the guidance route information does not include the position information when the traveling difficulty occurs, the current position calculation unit 420 calculates the current position of the mobile terminal 200. Next, the guidance route resetting unit 430 automatically sets the guidance route to the evacuation site based on the received guidance route information and the current position of the mobile terminal 200 (S160). When an application related to navigation is implemented in the mobile terminal 200, the guidance route resetting unit 430 automatically starts the application and causes the navigation function to search for a guidance route with the evacuation site as the destination. The guidance route is automatically set, or the guidance route included in the guidance route information received from the in-vehicle device 100 is automatically set. Next, the guidance route guidance unit 440 displays a road map including the guidance route on the display unit 230, and starts guidance to the evacuation site (S170).

According to this embodiment, when it becomes difficult to drive the vehicle during guidance to the evacuation site in an emergency, the guidance route information is transferred to the mobile terminal side and automatically based on the guidance route information received by the mobile terminal side. Since the guide route to the evacuation site is set in, the user does not need to search for the route to the evacuation site again with the mobile terminal after escaping from the vehicle, or to set the destination immediately. You can start moving to the evacuation site.

In the above embodiment, an example of guiding a guidance route to an evacuation site as a destination is shown in an emergency, but the present invention is not limited to such an emergency, and is applied to normal times other than an emergency. be able to. In normal times, if it becomes difficult for the vehicle to travel for some reason while guiding the guidance route of the set destination, the in-vehicle device transfers the guidance route information to the mobile terminal and the mobile terminal side to the destination. It may be possible to continue the prompt guidance of the guidance route of.

Further, in the above embodiment, an example in which the guidance route information is directly transmitted from the in-vehicle device 100 to the mobile terminal 200 when the vehicle becomes difficult to travel is shown, but this is an example, and the present invention is described as described above. It is not limited to just a few examples. For example, the vehicle-mounted device 100 may transmit the guidance route information from the communication unit 140 to the server 18, and the mobile terminal 200 may receive the guidance route information from the server 18. In this case, when the server 18 receives the guidance route information, the server 18 immediately transfers the guidance route information to the mobile terminal 200. Further, when the server 18 implements the navigation function, the mobile terminal 200 intermittently transmits the current location information to the server 18, and the server 18 intermittently transmits the current location information to the server 18, and the server 18 is an evacuation site based on the location information from the mobile terminal 200. The road map data including the guidance route to the mobile terminal 200 may be transmitted to the mobile terminal 200, and the mobile terminal 200 may display the received road map data on the display unit 230 to guide the evacuation site.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and variations are made within the scope of the gist of the invention described in the claims. It can be changed.

10: TCU 12: Antenna 100: In-vehicle device 200: Mobile terminal 300: Guidance function to evacuation site 400: Guidance route automatic setting function M: Vehicle

Claims (9)

An electronic device with a navigation function
A search means for searching a guidance route based on a set destination,
Guidance means for guiding the guidance route searched by the search means, and
An acquisition method for acquiring status information indicating the status of the own vehicle,
A determination means for determining whether or not the own vehicle is difficult to drive based on the situation information,
When it is determined by the determination means that it is difficult for the vehicle to travel, the transmission means for transmitting the guidance route information regarding the guidance route to the mobile terminal and the transmission means.
Electronic device equipped with. The electronic device according to claim 1, wherein the guidance route information includes at least one of an evacuation site as a destination and a guidance route to the evacuation site. When the determination means determines that it is difficult for the vehicle to travel, the search means re-searches for a guidance route for walking, and the transmission means transmits guidance route information regarding the re-searched guidance route. , The electronic device according to claim 1. The electron according to claim 3, wherein the search means re-searches for a guidance route having an evacuation site within a certain distance from the current position when the determination means determines that the vehicle is difficult to travel. Device. The electronic device according to claim 4, wherein the search means re-searches for a guidance route destined for an evacuation site that can be reached within the tsunami arrival time. The electronic device according to claim 1, wherein the determination means determines that the own vehicle is difficult to travel when any one of collision, submersion, stack, or puncture of the own vehicle is detected based on the situation information. The electronic device according to claim 1, wherein the mobile terminal is brought into the own vehicle. The electronic device according to claim 1, wherein the search means searches for a guidance route to an evacuation site in response to receiving disaster warning information from the outside. A guidance system including the electronic device according to any one of claims 1 to 8 and the mobile terminal.
The mobile terminal includes a receiving means for receiving the guidance route information, a setting means for setting a guidance route to a destination based on the received guidance route information, and a guidance means for guiding the set guidance route. Guidance system.

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