JP6619714B2 - Evacuation guidance information providing apparatus and evacuation guidance information providing method - Google Patents

Description

  The present invention relates to an evacuation guidance information providing apparatus and an evacuation guidance information providing method for providing evacuation guidance information to a user when a disaster such as flood, earthquake, or tsunami occurs.

  Japan is a country where natural disasters such as heavy rains, earthquakes, tsunamis, and volcanic eruptions occur extremely frequently. Therefore, in many local governments, hazard maps are created and distributed to residents, and shelters and routes are set in advance, and evacuation drills are also conducted. However, even if these hazard maps and evacuation routes are used, they correspond to disasters that occur under a certain scenario, and there is no guarantee that a disaster will occur according to the scenario.

  In particular, in the case of evacuation routes, there may be places where traffic is impossible due to disaster situations such as collapse of buildings due to earthquakes, submersion of depressions in the event of floods. Therefore, it is important to inform the residents in real time when the preset evacuation route becomes inaccessible, and more preferably to inform the residents that the inaccessibility is predicted before it becomes inaccessible. is there.

  For example, Patent Document 1 discloses an example of a disaster prevention / evacuation behavior simulation system. According to this simulation system, an arbitrary breach point of a river is input, and current river information is used to calculate inundation analysis and river channel water level prediction in real time. It is possible to create and display each possible inundation area. Furthermore, based on the prediction results of the flooding phenomenon, such as whether the residents can move to evacuation shelters during river flooding and which route should be taken, the optimal route (avoid dangerous areas and be able to act safely) Root) can be extracted. Therefore, by providing such information to the residents of the area, it is possible to support efficient disaster prevention activities such as evacuation guidance for the residents of the area and actions for avoiding dangerous spots.

  Patent Document 2 discloses an example of a system that delivers disaster information in real time to an individual's mobile terminal and provides a safe evacuation route that avoids a dangerous spot.

JP 2006-323569 A JP 2006-235980 A

  However, the optimum inundation area and evacuation route provided to residents by the system disclosed in Patent Document 1 is information provided to average residents in the area, and the information is Depending on the individual you receive, it may not always be appropriate. In particular, in recent years, even disaster information has been received by mobile phones and smartphones owned by individuals, and it is necessary to consider the circumstances of individuals in disaster information.

  Incidentally, in Patent Document 1, whether or not a road can pass is uniformly determined by the depth and flow velocity of the flood flow. However, the depth and flow velocity of the inundation flow that prevents the road from passing vary depending on the physique and physical strength of the individual. Therefore, even if an evacuation route allows a healthy adult to pass through, elderly people and children are not always evacuated safely.

  Moreover, in patent document 2, a user's movement route is tracked, and a plurality of pieces of information indicating that the user has changed the designated evacuation route is collected. A new safe evacuation route is provided. However, whether or not the user changes the evacuation route depends on the physique and physical strength of the user. Therefore, the safe evacuation route obtained in Patent Document 2 does not take into account physical abilities such as the physique and physical strength of individual users.

  In view of the above-described problems of the prior art, an object of the present invention is to provide an evacuation guidance information providing apparatus and an evacuation guidance information providing method capable of providing evacuation guidance information at the time of a disaster in consideration of a user's physical ability. It is to be realized.

The evacuation guidance information providing apparatus according to the present invention includes a disaster information management server that predicts disaster damage information that is a time-series predicted value of a disaster situation at each point in a predetermined area, a portable terminal carried by a user, The evacuation is connected via a communication network, has map information of the predetermined area including location information of the evacuation site, and provides evacuation guidance information from the current location of the user to the evacuation site to the portable terminal A guidance information providing device,
Based on the user information acquisition unit that acquires user information including the current position information and physical ability information of the user from the portable terminal, the current position information of the user, and the map information, the user The shortest evacuation route search unit that searches the shortest evacuation route as the shortest evacuation route among the evacuation routes from the current position to which the evacuation site is located, and the disaster information management server at each point in the predetermined area and disaster disaster information acquisition unit to acquire the disaster disaster information, and the disaster stricken information in each transit point to identify the evacuation routes leading to the shelter, based on the body's ability information of the user, for the evacuation routes A route risk degree calculation unit for calculating a time series prediction value of the route risk degree, and when the time series prediction value of the route risk degree for the shortest evacuation route exceeds a predetermined threshold value An alternative evacuation route search unit that searches for an evacuation route in which a part of the transit point is an evacuation route different from the shortest evacuation route and the time series prediction value of the route risk of the evacuation route is smaller than the threshold as an alternative evacuation route Information including the shortest evacuation route, the alternative evacuation route, and route instruction information indicating which of the shortest evacuation route and the alternative evacuation route should be passed, The shortest evacuation route becomes inaccessible at the branch point where the shortest evacuation route and the alternative evacuation route branch along the user's travel route and the evacuation guidance information providing unit provided to the mobile terminal as , and a path switching remaining time calculation unit for calculating a route switching remaining time is the time until the evacuation route leading to the shelter is switched to the alternative evacuation routes, the evacuation Broadcast providing unit, the route switching time remaining, and providing to the mobile terminal as part of the information constituting the evacuation guidance information.

  ADVANTAGE OF THE INVENTION According to this invention, the evacuation guidance information provision apparatus and evacuation guidance information provision method which can provide the evacuation guidance information at the time of a disaster in consideration of a user's physical ability are implement | achieved.

The figure which illustrated the example of the structure of the evacuation guidance information provision apparatus which concerns on embodiment of this invention, and the structure of the whole system to which the evacuation guidance information provision apparatus is applied. (A) is the figure which showed the example of the structure of the user information memorize | stored in a user information storage part, (b) shows the example of the structure of the shortest evacuation route information memorize | stored in the shortest evacuation path memory | storage part. Figure. The figure which showed the example of the evacuation route on the map. The figure which showed the example of the unit mesh used as the unit of calculation of disaster damage information on a map. The figure which showed the example of the structure of the disaster damage information memorize | stored in a disaster damage information storage part. (A) is the figure which showed the example of the time transition of the predicted value of the depth of the inundation flow in a certain unit mesh, FIG.6 (b) shows the example of the time transition of the predicted value of the risk in the said unit mesh. Figure. (A) is the figure which showed the example of the data structure of link risk, (b) is the figure which showed the example of the data structure of route risk. The figure which showed the example of the 1st process flow of the evacuation guidance information provision process in an evacuation guidance information provision apparatus. The figure which showed the example of the display screen displayed on a portable terminal when step S20 was performed in the processing flow shown in FIG. The figure which showed the example of the display screen displayed on a portable terminal, when step S21 is performed in the processing flow shown in FIG. The figure which showed the example of the display screen displayed on a portable terminal when step S22 was performed in the processing flow shown in FIG. The figure which showed the example of the 2nd processing flow of the evacuation guidance information provision process in an evacuation guidance information provision apparatus. The figure which showed the example of the display screen displayed on a portable terminal when the processing flow shown in FIG. 12 was performed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to a common component and the overlapping description is abbreviate | omitted.

<1. Overall system configuration>
FIG. 1 is a diagram illustrating an example of the configuration of an evacuation guidance information providing apparatus 1 according to an embodiment of the present invention and the configuration of the entire system to which the evacuation guidance information providing apparatus 1 is applied. As shown in FIG. 1, the evacuation guidance information providing apparatus 1 includes a mobile terminal 2 carried by each user, a disaster information management server 3 operated by a municipality, a meteorological agency, etc. via a communication network 5 such as the Internet. It is connected to the operating weather information providing server 4 and the like. In addition, the user as used in this specification means the user of the evacuation guidance information provision apparatus 1 below, and the user is also a user of the portable terminal 2 substantially.

  The disaster information management server 3 uses a simulation based on the rain area and rainfall information, tsunami information, river water level information, and the like provided from the weather information providing server 4 to perform a disaster Predict the disaster situation and calculate disaster damage information. Here, the disaster damage information means, for example, in the case of flood damage including a tsunami, time series predicted values of the depth and flow velocity of the inundation flow at each point in the inundation area. That is, the disaster information management server 3 calculates a time series predicted value from the present to a predetermined time (for example, one hour later) for the disaster information, and uses the calculated time series predicted value as the disaster information. Provided to the evacuation guidance information providing device 1 and the like.

  For example, in the event of a flood, the user transmits user information including his / her position information and physical ability information to the evacuation guidance information providing apparatus 1 via the portable terminal 2, thereby evacuating the evacuation guidance information providing apparatus 1. Request for evacuation guidance information such as evacuation routes. Here, the physical ability information refers to the age, height, walking speed, etc. of the user, and is preferably stored in the storage device of the portable terminal 2 in advance. The position information refers to information (latitude, longitude) of the current position where the mobile terminal 2 is acquired by the mobile terminal 2 via GPS (Global Positioning System).

  When the evacuation guidance information providing apparatus 1 is requested to provide the evacuation guidance information from the mobile terminal 2, the disaster information on each point included in a predetermined area such as a municipality where the user is located at that time from the disaster information management server 3 To get. The evacuation guidance information providing device 1 has map information including the location information of the refuge in the area, and evacuates based on the map information, the user's physical ability information, and the disaster information. Search the evacuation route to the place.

  In addition, in the search of the evacuation route at this time, a user's physical ability and disaster damage information are considered. For example, whether or not the shortest evacuation route to the evacuation center can pass depends on the height and age (physical strength) of the user as well as the depth and flow velocity of the flooded water at each waypoint included in the shortest evacuation route. Determined in consideration of If there is a possibility that the shortest evacuation route may not pass before the user arrives at the evacuation site through the shortest evacuation route, an alternative evacuation route is searched.

  As described above, the evacuation guidance information such as the shortest evacuation route and the alternative evacuation route to the searched evacuation site is transmitted from the evacuation guidance information providing device 1 to the mobile terminal 2 and displayed on the display device of the mobile terminal 2. The In this way, the user can obtain evacuation guidance information appropriately obtained according to his / her physical ability (age, height, walking speed, etc.).

<2. Configuration of Each Part of Evacuation Guidance Information Providing Device 1>
Next, details of the evacuation guidance information providing apparatus 1 will be described. As shown in FIG. 1, the evacuation guidance information providing apparatus 1 includes a processing unit 10, a storage unit 20, a communication unit 30, and the like.

  Here, the evacuation guidance information providing apparatus 1 is configured by a general computer such as a personal computer or a workstation in terms of hardware. In this case, the processing unit 10 corresponds to a storage device portion in which a so-called CPU (Central Processing Unit) of the computer and various programs executed by the CPU are stored. The storage unit 20 corresponds to a storage unit that stores various information used in the various programs, and the communication unit 30 corresponds to a so-called NIC (Network Interface Card) or the like.

  On the other hand, in terms of software, the processing unit 10 includes a user information acquisition unit 11, a shortest evacuation route search unit 12, a disaster information acquisition unit 13, a route risk level calculation unit 14, an alternative evacuation route search unit 15, and a route switch. It is composed of functional blocks such as a remaining time calculating unit 16 and an evacuation guidance information providing unit 17. In addition, the storage unit 20 includes a user information storage unit 21, a shortest evacuation route storage unit 22, a disaster damage information storage unit 23, a map information storage unit 24, a route risk degree storage unit 25, an alternative evacuation route storage unit 26, and route switching. The remaining time storage unit 27 is configured.

  Hereinafter, the function of each functional block constituting the processing unit 10 will be described with reference to FIG. 2 and subsequent drawings in addition to FIG. Here, FIG. 2A is a diagram showing an example of the configuration of user information stored in the user information storage unit 21, and FIG. 2B is the shortest stored in the shortest evacuation route storage unit 22. It is the figure which showed the example of the structure of evacuation route information. FIG. 3 is a diagram showing an example of an evacuation route on a map.

  <2.1> The user information acquisition unit 11 receives user information transmitted from the mobile terminal 2 via the communication network 5 and the communication unit 30, and stores the received user information in the user information storage unit 21. Store. As shown in FIG. 2A, the user information is composed of data such as a user ID, a current position, age, height, walking speed, passage means, accompanying person. Here, the user ID is information for identifying the user, and the current position is information indicating the position of the user acquired by the mobile terminal 2 via the GPS. Moreover, age, height, and walking speed are user physical ability information.

  On the other hand, the passage means and the accompanying person are information for correcting the physical ability information of the user. For example, if the accompanying person includes a child or an elderly person, the age, height, and walking speed of the user are , Will be corrected as appropriate according to the accompanying person. In this embodiment, in principle, the passing means is walking, and evacuation guidance for a user who gets on the vehicle is not assumed. However, if the accompanying person includes, for example, a wheelchair user, information indicating the wheelchair can be entered in this field, and in such a case, the physical ability information of the user is appropriately corrected. To do.

  <2.2> The shortest evacuation route search unit 12 is based on the current location information of the user stored in the user information storage unit 21 and the map information stored in the map information storage unit 24 in advance. Search for the shortest route from the user's current location to the nearby shelter. The obtained shortest route is stored in the shortest evacuation route storage unit 22. Note that the search for the shortest path does not take into account the disaster information or the ability information of the user's body.

  Here, it is assumed that the map information includes road information, facility information, and the like. The road information includes node position information representing intersections, link position and length information representing roads between intersections, and information representing link connection relationships. The facility information is composed of location information of commercial facilities, stores, etc., in addition to location information of public facilities such as hospitals and schools. The location information of the refuge is also included in the map information as one of the facility information.

  As shown in FIG. 2B, the shortest evacuation route information obtained by searching for such map information is composed of an array of a user ID, a current position, a shelter location, and a plurality of link IDs. The shortest evacuation route is specified by the arrangement of the plurality of link IDs. For example, as shown in the map of FIG. 3, the shortest evacuation route from the current position P to the evacuation site Q is represented by a list of link IDs L1, L2, L3, L4, and L5.

  In the map of FIG. 3, the thick solid link represents the shortest evacuation route, and the thick broken links L5 and L6 represent, for example, alternative evacuation routes when the link L4 cannot pass. In addition, a thick solid line, a thick broken line, and a thin solid line all represent links that are roads between intersections, and small black circles represent nodes that are intersections.

  <2.3> The disaster damage information acquisition unit 13 receives the disaster damage information transmitted from the disaster information management server 3 via the communication network 5 and the communication unit 30, and receives the received disaster damage information as a disaster damage information storage unit. 23. The disaster damage information is information for predicting the disaster situation of the disaster after the present and is obtained by the disaster information management server 3. As described above, in the case of flooding, the disaster information is expressed as a time-series predicted value of the depth and flow velocity of the inundation flow in a predetermined area, for example, each point in the municipality where the user is located.

  FIG. 4 is a diagram showing an example of a unit mesh that is a unit for calculating disaster information on a map. As shown in FIG. 4, the disaster information management server 3 divides an area (for example, a predetermined municipality) targeted for disaster damage simulation into, for example, a 200 m square mesh, and the disaster damage information ( Prediction and calculation of inundation flow depth and flow velocity). Hereinafter, each of the meshes is referred to as a unit mesh.

  FIG. 5 is a diagram illustrating an example of a configuration of disaster damage information stored in the disaster damage information storage unit 23. As shown in FIG. 5, the disaster damage information includes a mesh ID that identifies a unit mesh, and a depth di of the inundation flow in the unit mesh at each time ti (i = 0, 1,..., N). And flow rate vi data. That is, the disaster damage information is represented as a time series predicted value for each unit mesh. Here, time t0 represents the current time, and times t1,..., Tn represent the time after the present.

  <2.4> Next, before describing the function of the route risk level calculation unit 14, the concepts of “risk level”, “link risk level”, and “route risk level” in the present embodiment will be described first. .

  FIG. 6A is a diagram showing an example of the time transition of the predicted value of the depth of the inundation flow in a certain unit mesh, and FIG. 6B is an example of the time transition of the predicted value of the risk in the unit mesh. FIG. As shown in FIG. 6 (a), for example, in a certain unit mesh, if the depth d0, d1, d2,. Sometimes the user can't pass the link. The depth at which the user cannot pass varies depending on the height and physical strength of the user, and also varies depending on the flow velocity of the submerged flow.

Therefore, in the present embodiment, a risk level that takes into account the height and physical strength (physical ability) of the user is defined for each user.
For example, the degree of risk can be defined as a value of (depth of submerged flow × flow velocity) / (height × physical fitness). It is assumed that the physical strength is a value depending on age. For example, a trapezoidal polygonal line that increases with age, is almost constant at 20 to 50 years old, and decreases with age at 50 years old or older. It shall be expressed by function. The physical strength may be defined differently.

  That is, if the user is specified, the risk level is a value proportional to the depth of the inundation flow x the flow velocity. On the other hand, the risk level is different for each user even in an inundated flow having the same depth and flow velocity. That is, in the scene where the depth of the inundation flow x the flow velocity increases with time, as shown in FIG. 6B, for example, the risk level of a user with low physical strength (elderly person or child) is a user with high physical strength. Increases faster than (normal adult) risk. This is the same even if the physical strength is paraphrased as height.

  In the present embodiment, it is assumed that a risk threshold Ht at which roads cannot pass is set in advance. And when the danger degree in each point (each unit mesh) of the road calculated | required according to the user's physical ability exceeds threshold value Ht, the user shall be unable to pass the point. . For example, as shown in FIG. 6B, at a point where the degree of risk increases, a user with low physical strength cannot pass after time ts, and a user with high physical strength cannot pass after time tb.

  FIG. 7A is a diagram illustrating an example of a data configuration of link risk, and FIG. 7B is a diagram illustrating an example of a data configuration of route risk. As shown in FIG. 7 (a), the link risk level is the user ID for identifying the user, the link ID for identifying the link, and at each time ti (i = 0, 1,..., N). It is composed of the risk level hi. Further, as shown in FIG. 7B, the route risk level includes the user ID for specifying the user, the route ID for specifying the route, and each time ti (i = 0, 1,..., N). ) In the degree of risk Hi. That is, the link risk is expressed as a time series predicted value for each user and link, and the route risk is expressed as a time series predicted value for each user and route.

  <2.5> The route risk level calculation unit 14 (see FIG. 1) calculates the link risk level of the necessary link as necessary, and further calculates the route risk level for the shortest evacuation route, etc. Stored in the route risk storage unit 25.

  Here, the link risk and the route risk will be described. According to FIG. 5, the depth di and the flow velocity vi (i = 0, 1,..., N) of the submerged flow are given for each unit mesh. In the present embodiment, the degree of risk is a value that depends on the physical ability of the user, the depth di of the submerged flow, and the flow velocity vi. Therefore, the risk level can be easily obtained as long as it is a value for each unit mesh. When a link that is a road between intersections is included in only one unit mesh, the link risk level of the link can be easily obtained as the unit mesh risk level.

  On the other hand, when a part of the same link is included in a plurality of unit meshes, the link risk is defined as follows, for example. That is, when a part of the link La is included in, for example, three unit meshes Ma, Mb, and Mc, and the risk levels of the unit meshes Ma, Mb, and Mc at the time ti are ha, hb, and hc, , Ha, hb, and hc are defined as the link risk h at the time ti of the link La. In this definition, the number of unit meshes including a part of the link La is three, but the number is not limited to three.

  Next, when a route such as the shortest evacuation route is constituted by a series of links, the route risk degree of the route is defined as follows. For example, when the route Rx is composed of three links Lx, Ly, and Lz, and the link risks at the time ti of the links Lx, Ly, and Lz are hx, hy, and hz, hx, hy, and hz Is defined as the route risk level H at the time ti of the route Rx. In this definition, the number of links constituting the route Rx is three, but the number of links is not limited to three.

  <2.6> The alternative evacuation route search unit 15 determines that the route risk of the shortest evacuation route is a threshold before the user arrives at the evacuation site Q through the shortest evacuation route searched by the shortest evacuation route search unit 12. When Ht is exceeded, an alternative evacuation route that is a substitute for the shortest evacuation route is searched. The searched alternative evacuation route information is stored in the alternative evacuation route storage unit 26.

  In the example of FIG. 3, the alternative evacuation route is a route that avoids a link (for example, link L4) whose link risk exceeds the threshold value Ht within a predetermined time among the links included in the shortest evacuation route. That is, the shortest evacuation route is composed of links L1, L2, L3, L4, and L5, but the alternative evacuation route is composed of links L1, L2, L6, L7, and L5 that do not include the link L4. The predetermined time here refers to an evacuation time (for example, one hour) that is sufficient for an inhabitant defined in advance in a municipality to evacuate.

  <2.7> By the way, when the shortest evacuation routes L1, L2, L3, L4 and L5 and the alternative evacuation routes L1, L2, L6, L7 and L5 as shown in FIG. When point B is approached, it is necessary to determine which route should be taken. If the user knows that the link L4 does not become inaccessible before reaching the evacuation center Q through the shortest evacuation route when reaching the branch point B between the shortest evacuation route and the alternative evacuation route, Take the evacuation route, otherwise take the alternative route.

  For the convenience of route selection, the route switching remaining time calculation unit 16 calculates the route switching remaining time and provides it to the user when the user is at the current position P before reaching the branch point B. Here, the remaining route switching time is the time from the current time until the route risk of the shortest evacuation route exceeds the threshold value Ht, and the user arrives at the evacuation center Q from the branch point B through the shortest evacuation route. The time after subtracting the time required. In the calculation of the required time, the walking speed registered in the user information (see FIG. 2A) is used as the walking speed when the user passes from the branch point B to the shelter Q.

  Accordingly, when the user is at the current position P, the “route switching remaining time” provided to the user by the route switching remaining time calculation unit 16 is the remaining time until the shortest evacuation route by the user becomes inaccessible. means. In other words, if the user can arrive at the branch point B within this “route switching remaining time”, the user can go to the shelter Q through the shortest evacuation route. Also, if the user cannot arrive at the branch point B within the “route switching remaining time”, the user cannot go through the shortest evacuation route, so go to the evacuation center Q through the alternative evacuation route. It becomes.

  <2.8> The evacuation guidance information providing unit 17 transmits the evacuation guidance information including the shortest evacuation route, the alternative evacuation route, the remaining route switching time, and the like obtained as described above via the communication unit 30 and the communication network 5. To the user's mobile terminal 2. Note that an example in which the evacuation guidance information provided to the mobile terminal 2 is displayed on the display device of the mobile terminal 2 will be described with reference to a separate drawing.

<3. First processing flow of evacuation guidance information provision processing>
FIG. 8 is a diagram illustrating an example of a first processing flow of the evacuation guidance information providing process in the evacuation guidance information providing apparatus 1. This first processing flow is executed when the user requests provision of evacuation guidance information from the portable terminal 2 to the evacuation guidance information providing apparatus 1.

  As shown in FIG. 8, the user information acquisition unit 11 of the processing unit 10 of the evacuation guidance information providing apparatus 1 first obtains user information (user position information and physical ability information) transmitted from the mobile terminal 2. Obtain (step S11). Subsequently, the shortest evacuation route search unit 12 refers to map information of a predetermined area (for example, a municipal area), and from a position (current position) specified by position information included in the user information to a nearby refuge. The shortest route is searched as the shortest evacuation route (step S12).

  Next, the disaster damage information acquisition unit 13 acquires disaster damage information of a predetermined area (for example, a municipal area) from the disaster information management server 3 (step S13). Further, the route risk level calculation unit 14 calculates a time series prediction value of the route risk level of the shortest evacuation route based on the acquired physical ability information and disaster damage information of the user (step S14).

  Next, the alternative evacuation route search unit 15 determines whether or not the route risk level of the shortest evacuation route exceeds a preset threshold value Ht within a predetermined evacuation time (step S15). (Yes in step S15), an alternative evacuation route is searched (step S16). The term “predetermined evacuation time” as used herein refers to a time (for example, 1 hour) sufficient for residents to evacuate, as determined by the municipality concerned.

  Next, the remaining route switching time calculation unit 16 extracts a branch point between the shortest evacuation route and the alternative evacuation route (step S17), and calculates a remaining route switching time at the extracted branch point (step S18).

  Next, the evacuation guidance information providing unit 17 determines whether or not the calculated remaining route switching time is greater than 0 (zero) (step S19). As a result, if it is determined that the remaining route switching time is greater than 0 (Yes in step S19), the evacuation guidance information providing unit 17 performs the evacuation guidance information including the shortest evacuation route, the alternative evacuation route, and the remaining route switching time. Is created (step S20), and the created evacuation guidance information is transmitted to the portable terminal 2 (step S23). Note that an example of a display screen displayed on the mobile terminal 2 based on the evacuation guidance information will be described separately with reference to FIG.

  If it is determined in step S19 that the remaining route switching time is 0 or less (No in step S19), the evacuation guidance information providing unit 17 creates evacuation guidance information for instructing the passage of the alternative evacuation route. (Step S21). Then, the created evacuation guidance information is transmitted to the portable terminal 2 (step S23). Note that an example of a display screen displayed on the mobile terminal 2 based on the evacuation guidance information will be described separately with reference to FIG.

  Furthermore, when it is determined in step S15 that the route risk of the shortest evacuation route does not exceed the threshold value Ht within a predetermined time (No in step S15), the evacuation guidance information providing unit 17 Evacuation guidance information for instructing the passage of information is created (step S22). Then, the created evacuation guidance information is transmitted to the portable terminal 2 (step S23). Note that an example of a display screen displayed on the mobile terminal 2 based on the evacuation guidance information will be separately described with reference to FIG.

<4. Display example on the portable terminal 2 when the first processing flow is executed>
<4.1> FIG. 9 is a diagram illustrating an example of the display screen 50a displayed on the mobile terminal 2 when Step S20 is executed in the processing flow illustrated in FIG. As shown in FIG. 9, evacuation guidance information from the current position P to the evacuation site Q is displayed on the display screen 50 a of the mobile terminal 2 at an intersection course instruction display area 51, an evacuation route display area 52, and a route selection instruction display area 53. Are displayed in each area of the route risk predicted value display area 54.

  The evacuation route display area 52 is an area for displaying an evacuation route. In this area, a road map including the current position P and the evacuation site Q is displayed, and for example, the shortest evacuation route is a bold solid line. The evacuation route is indicated by a thick broken line. In addition, intersection names N1, N2,... Are displayed at each intersection (node) of the road map, and further, there is a remaining route switching time at the position of the branch intersection N2 of the shortest evacuation route and the alternative evacuation route. A display box 55 is displayed.

  In the intersection route instruction display area 51, information on a route instruction (information such as a left turn, a right turn, and a straight line) at the next intersection that the user will approach is displayed. In the route selection instruction display area 53, route selection information indicating which of the shortest evacuation route and the alternative evacuation route should be passed is displayed. In the route risk predicted value display area 54, a graph representing the time series predicted value of the route risk of the shortest evacuation route is displayed, and further, the predicted arrival time to the evacuation center Q and the branch are included in the graph. The estimated arrival time at the intersection N2 is also displayed.

  Since the display screen 50a of FIG. 9 is displayed when step S20 is executed in the processing flow shown in FIG. 8, the remaining path switching time calculated in step S18 is positive (greater than 0). ). Therefore, as shown in the route risk predicted value display area 54, if the user walks along the shortest evacuation route at the walking speed registered in the user information (see FIG. 2A), It is expected that the shortest evacuation route can arrive at the evacuation site Q before the route risk level exceeds the threshold value Ht.

  Further, in this case, as long as the user walks at the walking speed registered in the user information, it is not necessary to travel along the alternative evacuation route. However, when the arrival at the branch intersection N2 between the shortest evacuation route and the alternative evacuation route is delayed for some reason, the shortest evacuation route may become impassable. In that case, the user goes to the refuge Q through the alternative evacuation route. Therefore, in the present embodiment, a route switching remaining time display box 55 is displayed at the position of the branch intersection N2.

  For example, the time “10 minutes remaining” displayed in the route switching remaining time display box 55 can travel along the shortest evacuation route if it arrives at the branch intersection N2 within 10 minutes, but after 10 minutes, If it arrives, it means that the shortest evacuation route becomes inaccessible. That is, the evacuation route means that the shortest evacuation route is switched to the alternative evacuation route after 10 minutes. In this embodiment, since such a display is performed, the user can walk quickly or slowly according to his / her physical condition or weather conditions. That is, it can contribute to the reference of the user's evacuation behavior.

  <4.2> FIG. 10 is a diagram illustrating an example of the display screen 50b displayed on the mobile terminal 2 when Step S21 is executed in the processing flow illustrated in FIG. As shown in FIG. 10, a display screen 50 b similar to the display screen 50 a of FIG. 9 is displayed on the mobile terminal 2. However, in this case, since the remaining route switching time calculated in step S18 is 0 or less, the shortest evacuation route is inaccessible from the beginning. Therefore, in this case, for example, the evacuation route display area 52 clearly indicates that the point R on the shortest evacuation route is not allowed to pass, and the route selection instruction display area 53 has an instruction to pass the alternative evacuation route. It is clearly shown.

  Although it is possible to display a negative time in the path switching remaining time display box 55, in the example of FIG. 10, when the path switching remaining time is 0 or less, the path switching remaining time display box 55 Is not displayed.

  <4.3> FIG. 11 is a diagram illustrating an example of the display screen 50c displayed on the mobile terminal 2 when Step S22 is executed in the processing flow illustrated in FIG. As shown in FIG. 11, a display screen 50c similar to the display screen 50a of FIG. In this case, as shown in the route risk predicted value display area 54, the route risk of the shortest evacuation route does not exceed the threshold value Ht within a predetermined evacuation time (for example, 1 hour).

  Therefore, in this case, only the shortest evacuation route is displayed in the evacuation route display area 52, and no alternative evacuation route is displayed. In the route selection instruction display area 53, a passage instruction for the shortest evacuation route is clearly shown.

<5. Second Processing Flow of Evacuation Guidance Information Provision Processing>
FIG. 12 is a diagram illustrating an example of a second processing flow of the evacuation guidance information providing process in the evacuation guidance information providing apparatus 1. This second processing flow is executed at a predetermined time interval (for example, every one minute) after the first processing flow (see FIG. 8) is executed. Update the displayed content as appropriate.

  As shown in FIG. 12, the user information acquisition unit 11 of the processing unit 10 of the evacuation guidance information providing apparatus 1 uses the user information (user location information and physical ability information) transmitted from the mobile terminal 2. Is acquired (step S31).

  Next, the evacuation guidance information providing unit 17 displays display position information of the current position of the user included in the evacuation guidance information provided from the evacuation guidance information providing apparatus 1 to the mobile terminal based on the acquired user position information. Is updated (step S32). Further, the evacuation guidance information providing unit 17 updates the intersection course information (information such as left turn, right turn, straight ahead) in the intersection course instruction display area 51 (see FIG. 13) (step S33).

  Subsequently, when the route switching remaining time calculating unit 16 updates the route switching remaining time at the branch intersection (step S34), the evacuation guidance information providing unit 17 determines whether or not the route switching remaining time is greater than 0 ( Step S35). As a result of the determination, if the remaining route switching time is greater than 0 (Yes in step S35), the evacuation guidance information providing unit 17 instructs the passage of the shortest evacuation route as display information in the route selection instruction display area 53. Evacuation guidance information is created (step S36). If the remaining route switching time is 0 or less (No in step S35), the evacuation guidance information providing unit 17 instructs the passage of the alternative evacuation route as display information in the route selection instruction display area 53. Information is created (step S37).

  Next, the evacuation guidance information providing unit 17 transmits the evacuation guidance information updated or created as described above to the mobile terminal 2 (step S38).

  FIG. 13 is a diagram showing an example of a display screen 50d displayed on the mobile terminal 2 when the processing flow shown in FIG. 12 is executed. This display screen 50d is an example of a display screen 7 minutes after the display screen 50a of FIG. 9, and it can be seen that the current position P of the user has moved to just before the branch intersection N2. Further, the remaining route switching time is reduced from 10 minutes to 3 minutes.

  In the example of the display screen 50d in FIG. 13, it is determined that the remaining route switching time at the time of arrival is surely larger than 0 before the arrival at the branch intersection N2, and the shortest evacuation is displayed in the route selection instruction display area 53. A display that indicates the passage of the route is displayed. If the remaining route switching time is 0 or less at the time when the display screen 50d is displayed, the route selection instruction display area 53 is displayed to instruct the passage of the alternative evacuation route.

  As described above, according to the embodiment of the present invention, the time series prediction value of the risk of each link (road) and the shortest evacuation route included in the disaster area is calculated according to the physical ability of each user. If there is a possibility that the risk of the shortest evacuation route may exceed a predetermined risk threshold Ht before the user can reach the evacuation site through the shortest evacuation route, along with the shortest evacuation route Alternative evacuation routes are provided. Therefore, the user can surely reach the evacuation site through the shortest evacuation route or the alternative evacuation route appropriate for the disaster situation and his / her physical ability. That is, the user is provided with evacuation guidance information called an evacuation route according to the physical ability of the user.

  In the present embodiment, the route switching until the evacuation route is switched from the shortest evacuation route to the alternative evacuation route when the user's physical ability is considered at the branch point between the shortest evacuation route and the alternative evacuation route. The remaining time is displayed. Therefore, the user can increase or decrease the subsequent walking speed according to the remaining route switching time. That is, the user is provided with evacuation guidance information corresponding to the physical ability of the user.

  The present invention is not limited to the embodiments and modifications described above, and includes various modifications. For example, the above-described embodiments and modifications have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. In addition, a part of the configuration of an embodiment or modification can be replaced with the configuration of another embodiment or modification, and the configuration of another embodiment or modification can be replaced with another embodiment or modification. It is also possible to add the following configuration. In addition, with respect to a part of the configuration of each embodiment or modification, the configuration included in another embodiment or modification may be added, deleted, or replaced.

DESCRIPTION OF SYMBOLS 1 Evacuation guidance information provision apparatus 2 Portable terminal 3 Disaster information management server 4 Weather information provision server 5 Communication network 10 Processing part 11 User information acquisition part 12 Shortest evacuation route search part 13 Disaster damage information acquisition part 14 Path risk degree calculation part 15 Alternative evacuation route searching unit 16 Route switching remaining time calculating unit 17 Evacuation guidance information providing unit 20 Storage unit 21 User information storage unit 22 Shortest evacuation route storage unit 23 Disaster damage information storage unit 24 Map information storage unit 25 Route risk degree storage unit 26 Alternative evacuation route storage unit 27 Route switching remaining time storage unit 30 Communication unit 50a, 50b, 50c, 50d Display screen 51 Intersection route instruction display region 52 Evacuation route display region 53 Route selection instruction display region 54 Route risk prediction value display region 55 Route switching remaining time display box

Claims (6)

Connected via a communication network to a disaster information management server that predicts disaster damage information , which is a time-series predicted value of the disaster situation at each point in a given area, and a mobile terminal carried by the user, a shelter An evacuation guidance information providing device that provides the mobile terminal with evacuation guidance information from the current location of the user to the evacuation site, having map information of the predetermined area including location information of the user,
A user information acquisition unit for acquiring user information including the current position information and physical ability information of the user from the portable terminal;
Based on the current location information of the user and the map information, the shortest evacuation route search that searches the shortest evacuation route as the shortest evacuation route among the evacuation routes from the current location where the user is located to the evacuation site And
A disaster information acquisition unit for acquiring the disaster information at each point in the predetermined area from the disaster information management server;
Route is calculated and the disaster stricken information in each transit point to identify the evacuation routes leading to the shelter, based on the body's ability information of the user, the time series prediction value of the route risk for that evacuation routes A risk calculator,
When the time series prediction value of the route risk level for the shortest evacuation route exceeds a predetermined threshold, a part of the waypoint is an evacuation route different from the shortest evacuation route, and the route of the evacuation route An alternative evacuation route search unit for searching a route whose risk time series prediction value is smaller than the threshold as an alternative evacuation route;
Information including the shortest evacuation route, the alternative evacuation route, and route instruction information indicating which of the shortest evacuation route and the alternative evacuation route should be passed as the evacuation guidance information An evacuation guidance information providing unit to be provided to a mobile terminal;
At the branch point where the shortest evacuation route and the alternative evacuation route branch along the user's travel route, the shortest evacuation route becomes impassable and the evacuation route to the evacuation site is the alternative evacuation route. A path switching remaining time calculating unit for calculating a path switching remaining time which is a time until switching to
Equipped with a,
The said evacuation guidance information provision part provides the said route switching remaining time to the said portable terminal as a part of information which comprises the said evacuation guidance information, The evacuation guidance information provision apparatus characterized by the above-mentioned . The evacuation guidance information providing unit
The evacuation guidance information provision according to claim 1, wherein a time series prediction value of the route risk degree for the shortest evacuation route is provided to the portable terminal as a part of information constituting the evacuation guidance information. apparatus. The evacuation guidance information providing apparatus according to claim 1, wherein the physical ability information of the user is information including at least one of the height, age, and walking speed of the user. The evacuation guidance information providing apparatus according to claim 1, wherein the disaster situation includes a depth and a flow velocity of the inundation flow at each point. Connected via a communication network to a disaster information management server that predicts disaster damage information , which is a time-series predicted value of the disaster situation at each point in a given area, and a mobile terminal carried by the user, a shelter An evacuation guidance information providing device for providing the portable terminal with evacuation guidance information from the current position of the user to the evacuation site, having map information of the predetermined area including the location information of
Obtaining user information including current position information and physical ability information of the user transmitted from the mobile terminal;
Searching the shortest evacuation route as the shortest evacuation route among the evacuation routes from the current position where the user is located to the evacuation site based on the current location information of the user and the map information;
Obtaining the disaster information at each point in the predetermined area from the disaster information management server;
Step of calculating and the disaster stricken information in each transit point to identify the evacuation routes leading to the shelter, based on the body's ability information of the user, the time series prediction value of the route risk for that evacuation routes When,
When the time series prediction value of the route risk level for the shortest evacuation route exceeds a predetermined threshold, a part of the waypoint is an evacuation route different from the shortest evacuation route, and the route of the evacuation route Searching for a route whose risk time series prediction value is smaller than the threshold as an alternative evacuation route;
Information including the shortest evacuation route, the alternative evacuation route, and route instruction information for instructing which of the shortest evacuation route and the alternative evacuation route should be used as the evacuation guidance information Providing to the mobile terminal;
At the branch point where the shortest evacuation route and the alternative evacuation route branch along the user's travel route, the shortest evacuation route becomes impassable, and the evacuation route to the evacuation site is switched to the alternative evacuation route. Calculating the remaining route switching time, which is the time until
The execution,
In the step of providing the evacuation guidance information to the mobile terminal,
The route guidance remaining time is provided to the portable terminal as a part of information constituting the evacuation guidance information. The evacuation guidance information providing device
6. The evacuation guidance information provision according to claim 5 , wherein a time series prediction value of the route risk level for the shortest evacuation route is provided to the portable terminal as a part of information constituting the evacuation guidance information. Method.

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