JP2018036281A - User terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide more useful information in judgement of an executable action after arriving at a destination to users of electrically-driven moving bodies.SOLUTION: A user terminal is the user terminal that communicates with an information providing device for an electrically-driven moving body. The user terminal is configured to: transmit a request for judgement of whether the electrically-driven moving body at a certain spot may arrive at a destination by means of a state of charge of the electrically-driven moving body at a certain spot to the information providing device; when it is judged by the information providing device that it is possible to arrive at the destination, receive, from the information providing device, indication data indicative of a plurality of reachable spots where the electrically-driven moving body is reachable when departing from the destination after arriving at the destination; and link adjacent reachable spots themselves of the plurality of reachable spots on the basis of the received indication data, and thereby make a further reachable range from the destination displayed on a screen.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a user terminal, and more particularly to a technique for providing useful information to a user of an electric vehicle.

  Determining whether or not a desired action can be performed (for example, determining whether the destination can be reached) based on the current battery remaining amount (also referred to as SOC: state of charge) is an electric vehicle such as an electric vehicle. This is one of the items of interest to users of automobiles (EVs). In particular, with current technology, there is a limit to the amount of power that can be stored in the battery and the efficient charging of the battery. Therefore, whether or not the user can perform the desired action depends on the actual driving of the electric vehicle. It is one of important information.

  Patent Document 1 (Japanese Patent Laid-Open No. 2010-210271) discloses a technique for accurately determining whether or not an electric vehicle can reach a destination with the current remaining battery capacity. In the technology described in this publication, the amount of power consumed by the vehicle auxiliary machine is estimated based on the environmental information of the route from the current location to the destination, and the electric vehicle consumed in consideration of the amount of power consumed by the vehicle auxiliary machine. It is determined whether or not can arrive at the destination.

  The patent document 1 discloses that when it is determined that the destination can be reached, the battery remaining amount after reaching the destination is obtained, and the distance that the electric vehicle can travel is calculated based on the remaining battery amount after reaching the destination. ing. How to display the distance from the current location to the destination plus the distance that the electric vehicle can travel with the remaining battery capacity after reaching the destination on the display The driver can easily recognize whether charging should be performed at any timing, and convenience can be improved.

  However, according to the study by the inventors, the travelable distance obtained by adding the distance that the electric vehicle can travel with the remaining battery amount after reaching the destination and the route distance from the current location to the destination is displayed. The method has room for improvement in terms of providing more useful information for determining actions that can be performed after reaching the destination.

JP 2010-210271 A

  Therefore, an object of the present invention is to provide a user terminal that can provide a user with information that is more useful for determining actions that can be performed after reaching a destination.

  In one aspect of the present invention, the user terminal is a user terminal that communicates with an information providing device for an electric vehicle. The user terminal transmits a request for determining whether or not the electric mobile body can reach a destination from the certain point based on an SOC (state of charge) of the electric mobile body at a certain point, When the information providing apparatus determines that the destination can be reached, a plurality of reachable points that can be reached when the electric vehicle departs the destination after reaching the destination. The display data to be displayed is received from the information providing device, and based on the received display data, by connecting adjacent reachable points among the plurality of reachable points, a range that can be further reached from the destination Is displayed on the screen.

  In the user terminal according to another aspect of the present invention, when two of a plurality of reachable points have different distances from the destination, the reachable points are connected by connecting adjacent reachable points in a non-circular shape. Various ranges may be displayed on the screen.

  In the user terminal according to another aspect of the present invention, a route from the destination to the plurality of reachable points may be further added to display the reachable range on the screen.

  In the user terminal according to another aspect of the present invention, a route from the certain point to the destination may be further added to display the reachable range on the screen.

  In a user terminal according to another aspect of the present invention, a portion inside the reachable range may be displayed in a color tone different from that of the portion outside the reachable range.

  According to one aspect of the present invention, an electric vehicle information providing apparatus that provides information about an electric vehicle is configured such that an electric vehicle moves from a certain point to a destination with respect to an SOC (state of charge) of the electric vehicle at a certain point. In order to display a calculation means for calculating a plurality of reachable points that can be reached when the destination is departed after reaching the destination, and a reachable range display screen in which the plurality of reachable points can be visually recognized Display data generating means for generating the display data.

  It is preferable that a closed curve passing through a plurality of reachable points is displayed on the reachable range display screen. It should be noted that the closed curve here includes a combination of line segments. Here, when two of the plurality of reachable points have different distances from the destination, the closed curve is drawn so as not to be a circle.

  The reachable range display screen preferably displays routes from the destination to a plurality of reachable points, and the reachable range display screen displays the route from the departure point to the destination. It is preferable. Further, on the reachable range display screen, it is preferable that the inner portion of the closed curve is displayed in a color tone different from that of the outer portion of the closed curve.

  In one embodiment, the calculating means determines a plurality of next destinations so as to surround the destination, sets the destination as the next starting point, and simulates the traveling of the electric vehicle from the next starting point to the next destination. A travel simulation is performed, and a plurality of reachable points are calculated as points that can be reached when starting from the next departure point on a route that reaches each of a plurality of next destinations from the next departure point. In this case, the calculating means calculates the SOC of the electric vehicle at the destination, and the distance between the destination and the plurality of next destinations depends on the SOC of the electric vehicle at the destination. It is preferable to determine a plurality of next destinations.

  Further, the calculation means performs a running simulation using a road network model that expresses a road network with a node that expresses an intersection and a link that expresses a road connecting the nodes, and the calculation means surrounds the destination As described above, a plurality of next destination ranges may be determined, and nodes included in each of the next destination ranges may be determined as the next destination. At this time, the calculation means calculates the SOC of the electric vehicle at the destination, and the distance between the destination and each of the plurality of next destination ranges is a distance depending on the SOC of the electric vehicle at the destination. Preferably, a plurality of next destination ranges are determined. In addition, when the road network model node is not included in the specific next destination range among the plurality of next destination ranges, the calculating means adjusts the size and / or position of the specific next destination range. May be.

  In one embodiment, the calculation means sets the destination as the next departure point, determines a plurality of next destinations so as to surround the destination, and simulates the traveling of the electric vehicle from the next departure point to the next destination. Run a road simulation using a road network model that expresses a road network with nodes that express intersections and links that express the roads that connect the nodes. A plurality of reachable points may be calculated as points that can be reached when starting from the next departure point on the route to be reached. Here, the calculation means sets a plurality of next destination ranges so as to surround the destination, and determines at least one node of the road network model among the plurality of next destination ranges. For the next destination range included, at least one of the nodes is determined as the next destination, and among the multiple next destination ranges, the road non-existing next destination range set in an area where no road exists May be changed to include at least one node of the road network model to determine the next destination range after the change, and a node included in the next destination range after the change may be determined as the next destination . In this case, if the calculation means determines that the next destination determined from the next destination range after the change from the next departure point can be reached by the travel simulation, the next destination and the next destination range where no road exists. It is preferable that a virtual reachable position located between the positions is determined, and the calculation unit determines the closed curve so as to pass through the plurality of reachable points and the virtual reachable position.

  Note that each of the plurality of reachable points may be calculated as a point where the SOC of the electric vehicle becomes a specific value.

  Further, as an example, “a certain point” is the current location where the electric vehicle is currently located, and the SOC of the electric vehicle given to the calculation means is the SOC of the current electric vehicle.

  In another aspect of the present invention, there is provided an electric vehicle information providing method for providing information on an electric vehicle, with respect to the SOC (state of charge) of the electric vehicle at a specific point. Calculating multiple reachable points that can be reached when the destination is departed after reaching the destination, and displaying a reachable range display screen in which the multiple reachable points can be visually recognized Generating display data.

  In one embodiment, the steps of calculating a plurality of reachable points include determining a plurality of next destinations so as to surround the destination, setting the destination as a next departure point, And a step of performing a travel simulation for simulating the travel of the electric vehicle to the destination. In this case, it is preferable that the plurality of reachable points are calculated as points that can be reached when starting from the next departure point on a route that reaches each of the plurality of next destinations from the next departure point by running simulation. .

  In another aspect of the present invention, a program used to provide information about an electric vehicle is provided. The program has multiple reachable states that can be reached when the electric vehicle departs from the destination after the electric vehicle has arrived at the destination from a certain point. A calculation device is caused to execute a step of calculating a point and a step of generating display data for displaying a reachable range display screen in which a plurality of reachable points can be visually recognized.

  In one aspect of the present invention, the user terminal displays display data for displaying a reachable range display screen in which a plurality of reachable points of the electric vehicle can be visually recognized via the network from the EV management system. The EV management system receives the SOC (state of charge) of the electric vehicle at a certain point after the electric vehicle has reached the destination from the certain point. Calculating means for calculating the plurality of reachable points that are reachable when leaving the destination; and displaying the reachable range display screen in which the plurality of reachable points are visually recognizable. Display data generating means for generating display data, wherein the calculating means determines a plurality of next destinations so as to surround the destination, and sets the destination as a next departure place. And performing a travel simulation for simulating the travel of the electric vehicle from the next departure point to the next destination, and in the route from the next departure point to each of the plurality of next destinations. The plurality of reachable points are calculated as points that are reachable when departing from the vehicle, and the calculating means expresses a road network with nodes expressing intersections and links expressing roads connecting the nodes. The traveling simulation is performed using a road network model, and the calculation means determines a plurality of next destination ranges so as to surround the destination, and nodes included in each of the next destination ranges are determined as the next destination range. It is a user terminal that is determined as the ground.

  In one embodiment, in the user terminal described above, a closed curve passing through the plurality of reachable points is displayed on the reachable range display screen.

  In one embodiment, in the user terminal described above, when two of the plurality of reachable points have different distances from the destination, the closed curve is not a circle.

  In one embodiment, in the user terminal, the reachable range display screen displays a route from the destination to the plurality of reachable points.

  In one embodiment, in the above user terminal, a route from the certain point to the destination is displayed on the reachable range display screen.

  In one embodiment, in the above-described user terminal, on the reachable range display screen, a portion inside the closed curve is displayed in a color tone different from a portion outside the closed curve.

  In one embodiment, in the above user terminal, the calculating means calculates an SOC of the electric vehicle at the destination, and a distance between the destination and the plurality of next destinations is the destination. The plurality of next destinations are determined so as to depend on the SOC of the electric vehicle at.

  In one embodiment, in the user terminal, the calculating means calculates an SOC of the electric vehicle at the destination, and the distance between the destination and each of the plurality of next destination ranges is the destination. The plurality of next destination ranges are determined so as to have a distance depending on the SOC of the electric vehicle at.

  In one embodiment, in the above-described user terminal, when a node of the road network model is not included in a specific next destination range among the plurality of next destination ranges, the calculation unit includes the specific next destination range. Adjust the size and / or location of the destination range.

  In one embodiment, in the user terminal, the calculation unit sets the destination as a next departure point, determines a plurality of next destinations so as to surround the destination, and determines the next destination from the next departure point. A driving simulation for simulating the driving of the electric vehicle to the destination is executed using a road network model that expresses a road network with nodes that express intersections and links that express roads connecting the nodes. , Calculating the plurality of reachable points as points that can be reached when starting from the next starting point in a route that reaches each of the plurality of next destinations from the next starting point, In determining a plurality of next destinations, a plurality of next destination ranges are set so as to surround the destination, and at least one node of the road network model is selected from the plurality of next destination ranges. For the next destination range including the mobile station, one of the at least one node is determined as the next destination, and the road destination set in an area where no road exists among the plurality of next destination ranges. The existing destination range is changed to include at least one node of the road network model to determine the changed next destination range, and the nodes included in the changed next destination range are set to the next destination range. When the destination is determined by the travel simulation to be able to reach the next destination determined from the changed next destination range from the next departure location, the next destination is determined. And a virtual reachable position located between the position of the next destination range without the road, and the calculating means determines the closed curve as the plurality of reachable points and the virtual reachable position. Determined as over to.

  In one embodiment, in the above-described user terminal, each of the plurality of reachable points is calculated as a point where the SOC of the electric vehicle becomes a specific value.

  In one embodiment, in the user terminal, the certain point is a current position where the electric vehicle is currently located, and the SOC of the electric vehicle given to the calculation means This is the SOC of the electric vehicle.

  In one embodiment, in the above-described user terminal, the calculation means determines a plurality of next destinations so as to surround the destination, sets the destination as a next departure point, and sets the next departure point to the next destination. A travel simulation that simulates the travel of the electric vehicle to the destination is performed, and each of the routes that reach each of the plurality of next destinations from the next departure point is reached when starting from the next departure point. A plurality of specific condition reachable points among the plurality of reachable points are calculated as points that are possible and satisfy different conditions, and the plurality of specific conditions reachable on the reachable range display screen A first closed curve passing through a plurality of first specific condition reachable points that satisfy a first condition among the different conditions among the points, and the plurality of specific condition reachable points Of the second closed curve passing through the second specific condition reachable point of the second condition is satisfied more of different conditions are displayed.

  In another aspect of the present invention, the electric vehicle is an electric vehicle that provides probe information to the EV management system via a wireless communication network, and the EV management system includes the electric vehicle at a certain point. Calculation of the state of charge (SOC) of the mobile object that calculates the plurality of reachable points that can be reached when the electric mobile body leaves the destination after reaching the destination from the certain point And display data generating means for generating display data for displaying a reachable range display screen in which the plurality of reachable points are visually recognizable, and the calculating means surrounds the destination Determining a plurality of next destinations, setting the destination as the next departure point, and running simulation for simulating the traveling of the electric vehicle from the next departure point to the next destination Calculating the plurality of reachable points as points that are reachable when starting from the next starting point in a route that reaches each of the plurality of next destinations from the next starting point, The driving simulation is performed using a road network model that expresses a road network with a node that expresses an intersection and a link that expresses a road that connects the nodes, and the calculation means surrounds the destination An electric vehicle that determines a plurality of next destination ranges and determines a node included in each of the next destination ranges as the next destination.

  In one embodiment, in the electric vehicle described above, a closed curve that passes through the plurality of reachable points is displayed on the reachable range display screen.

  In one embodiment, in the electric vehicle described above, when two of the plurality of reachable points have different distances from the destination, the closed curve is not a circle.

  In one embodiment, in the above-described electric vehicle, the reachable range display screen displays a route from the destination to the plurality of reachable points.

  In one embodiment, in the electric vehicle described above, a route from the certain point to the destination is displayed on the reachable range display screen.

  In one embodiment, in the above-mentioned electric vehicle, on the reachable range display screen, the inner portion of the closed curve is displayed in a color tone different from the outer portion of the closed curve.

  In one embodiment, in the above-mentioned electric vehicle, the calculating means calculates the SOC of the electric vehicle at the destination, and the distance between the destination and the plurality of next destinations is the destination. The plurality of next destinations are determined so as to depend on the SOC of the electric vehicle on the ground.

  In one embodiment, in the above-mentioned electric vehicle, the calculating means calculates the SOC of the electric vehicle at the destination, and the distance between the destination and each of the next destination ranges is the destination. The plurality of next destination ranges are determined so that the distance depends on the SOC of the electric vehicle on the ground.

  In one embodiment, in the electric vehicle described above, when a node of the road network model is not included in a specific next destination range of the plurality of next destination ranges, the calculation unit includes the specific mobile unit. Adjust the size and / or position of the next destination range.

  In one embodiment, in the above-mentioned electric vehicle, the calculation means sets the destination as a next departure place, determines a plurality of next destinations so as to surround the destination, and determines the next departure place from the next departure place. A driving simulation that simulates the driving of the electric vehicle to the next destination is executed using a road network model that expresses a road network with nodes that express intersections and links that express roads that connect the nodes. And calculating the plurality of reachable points as points that are reachable when starting from the next starting point in a route that reaches each of the plurality of next destinations from the next starting point, In determining the plurality of next destinations, a plurality of next destination ranges are set so as to surround the destination, and at least one node of the road network model is selected from the plurality of next destination ranges. For the next destination range that includes, one of the at least one node is determined as the next destination, and no road is set in an area where no road exists among the plurality of next destination ranges The next destination range is changed to include at least one node of the road network model to determine the changed next destination range, and the nodes included in the changed next destination range are set as the next destination range. When the calculation means determines that the next destination determined from the next destination range after the change is reachable from the next departure location by the traveling simulation, the next destination and A virtual reachable position located between the positions of the next destination range without the road is determined, and the calculating means passes the closed curve through the plurality of reachable points and the virtual reachable position. Decide to.

  In one embodiment, in the above-mentioned electric vehicle, each of the plurality of reachable points is calculated as a point where the SOC of the electric vehicle becomes a specific value.

  In one embodiment, in the above-mentioned electric vehicle, the certain point is a current position where the electric vehicle is currently located, and the SOC of the electric vehicle given to the calculation means is It is SOC of the said electric vehicle.

  In one embodiment, in the above-described electric vehicle, the calculating means determines a plurality of next destinations so as to surround the destination, sets the destination as a next starting point, and determines the destination from the next starting point. When a driving simulation that simulates the driving of the electric vehicle to the next destination is performed, and each of the routes that reach each of the plurality of next destinations from the next starting point, A plurality of specific condition reachable points among the plurality of reachable points are calculated as points that are reachable and satisfy different conditions, and the plurality of specific condition arrivals are displayed on the reachable range display screen. A first closed curve passing through a plurality of first specific condition reachable points that satisfy a first condition among the different conditions among the possible points, and the plurality of specific condition reachable points A second closed curve appears to pass through the Chino second specific condition reachable point of the second condition is satisfied more of the different conditions.

  According to the user terminal of the present invention, it is possible to provide the user with information that is more useful for determining actions that can be performed after reaching the destination.

It is a conceptual diagram which shows the structure of the EV management system which functions as an electrically-driven mobile body information provision apparatus of one Embodiment of this invention. In this embodiment, it is a figure which shows the example of a structure of the host computer provided in EV management center. It is a figure which shows the example of a structure of the traffic flow simulator in this embodiment. It is a conceptual diagram which shows the example of a road network model. It is a functional block diagram which shows the data processing by the host computer in this embodiment. It is a flowchart which shows the data processing by the traffic flow simulator in this embodiment. It is a figure which shows the example of the setting of the next destination range in this embodiment. It is a figure which shows the example of the setting of the next destination in this embodiment. It is a figure which shows the example of calculation of the reachable point in this embodiment. It is a figure which shows the example of the reachable range display screen in this embodiment. It is a figure which shows the other example of the reachable range display screen in this embodiment. It is a figure which shows the further another example of the reachable range display screen in this embodiment. In this embodiment, it is a conceptual diagram explaining the problem of the underestimation of the reachable range that may occur when the next destination range is set in an area where no road exists (for example, at sea). It is a conceptual diagram which shows the solution method of the problem of the underestimation of the reachable range in this embodiment.

  FIG. 1 is a conceptual diagram showing a configuration of an EV management system 10 that functions as an electric vehicle information providing apparatus according to an embodiment of the present invention. The EV management system 10 includes a host computer 1 provided in an EV management center (EVC: Electric Vehicle Management Center) and a traffic flow simulator 2.

  The host computer 1 has a function of grasping and managing the state of the electric vehicle, more specifically, the electric vehicle 3, and a function of providing various information about the electric vehicle 3 to a user (EV user) of the electric vehicle 3. And have. Specifically, the host computer 1 communicates with the electric vehicle 3 via the wireless communication network 5 and collects probe information from the electric vehicle 3. Here, the probe information is information indicating the state of each electric vehicle 3 and includes, for example, information indicating battery capacity (SOC: State of Charge) and position information indicating the current position of each electric vehicle 3. Yes.

  In addition, the host computer 1 is communicably connected to a user terminal 4 operated by an EV user via a network 6. As the user terminal 4, for example, a personal computer 4a may be used, or a mobile phone, a smart phone or other mobile terminal 4b may be used. The host computer 1 receives a request from the user terminal 4 and provides the user terminal 4 with information related to the electric vehicle 3 corresponding to the request. As will be described in detail later, in this embodiment, the host computer 1 provides the user terminal 4 with information on whether the electric vehicle 3 can arrive at the destination, and after the electric vehicle 3 arrives at the destination, Display data for displaying a reachable range display screen showing a reachable range is transmitted to the user terminal 4.

  The traffic flow simulator 2 is a computer used for performing a running simulation of the electric vehicle 3. A determination is made as to whether or not the electric vehicle 3 can arrive at the destination by the traveling simulation of the electric vehicle 3, and when the electric vehicle 3 arrives at the destination and then departs from the destination as the next departure point The possible range is calculated.

  FIG. 2 is a diagram illustrating an example of the configuration of the host computer 1. The host computer 1 includes an arithmetic device 11, an input device 12, a display device 13, an external interface 14, and a storage device 15. The arithmetic device 11 performs various data processing for managing the electric vehicle 3 and various data processing for providing information related to the electric vehicle 3 to the user terminal 4. As the arithmetic unit 11, for example, one or a plurality of CPUs (central processing units) can be used. The input device 12 is operated by an administrator of the host computer 1 and receives data input by various operations. The display device 13 displays various images during the operation of the host computer 1. The input device 12 and the display device 13 function as a man-machine interface of the host computer 1.

  The external interface 14 is an interface for connecting to external communication means (for example, the wireless communication network 5 and the network 6). The host computer 1 communicates with the traffic flow simulator 2, the electric vehicle 3, and the user terminal 4 via the external interface 14.

  The storage device 15 stores a program for operating the arithmetic device 11 and stores various data necessary for data processing by the arithmetic device 11. In the present embodiment, EV management server software 16 and EV information providing server software 17 are installed in the storage device 15, and an EV management database 18 is stored in the storage device 15.

  The EV management server software 16 is a program for causing the host computer 1 to function as an EV management server that manages the electric vehicle 3. The EV management server has a function of collecting probe information from the electric vehicle 3 and storing the collected probe information of each electric vehicle 3 in the EV management database 18 in association with the vehicle ID of each electric vehicle 3.

  The EV information providing server software 17 is a program for causing the host computer 1 to function as an EV information providing server that provides information related to the electric vehicle 3 to the user terminal 4. In the present embodiment, the EV information providing server provides the user terminal 4 with information regarding whether the electric vehicle 3 can arrive at the destination, and reaches the destination indicating the reachable range of the electric vehicle 3 after arriving at the destination. It has a function of transmitting display data for displaying the possible range display screen to the user terminal 4. The EV information providing server may be implemented as a Web server.

  Note that the host computer 1 may not be implemented as a single computer, but may be implemented as a series of computing resources (network, server, storage, application) for realizing cloud computing.

  FIG. 3 is a diagram illustrating an example of the configuration of the traffic flow simulator 2. The traffic flow simulator 2 includes a calculation device 21, an input device 22, a display device 23, an external interface 24, and a storage device 25. The arithmetic device 21 performs various data processing for a traveling simulation of the electric vehicle 3. As the computing device 21, for example, one or a plurality of CPUs (central computing units) can be used. The input device 22 is operated by an administrator of the traffic flow simulator 2 and receives data input by various operations. The display device 23 displays various images in the operation of the traffic flow simulator 2. The input device 22 and the display device 23 function as a man-machine interface of the traffic flow simulator 2.

  The external interface 24 is an interface for connecting to external communication means. The traffic flow simulator 2 communicates with the host computer 1 via the external interface 24.

  The storage device 15 stores a program for operating the arithmetic device 21 and stores various data necessary for data processing by the arithmetic device 21. In the present embodiment, a traffic flow simulation program 26 is installed in the storage device 15 and a road network model 27 is stored.

  The traffic flow simulation program 26 is a program that causes the computing device 21 to execute a travel simulation of the electric vehicle 3. When the electric vehicle 3 arrives at the destination by the travel simulation by the traffic flow simulation program 26, and when the electric vehicle 3 arrives at the destination, the destination departs from the destination The reachable range is calculated. Here, the traffic flow simulation program 26 has a function of simulating the traffic flow generated when a large number of vehicles (including the electric vehicle 3) travel on the road. Therefore, it can be determined whether or not the electric vehicle 3 can arrive at the destination in the situation where the traffic flow exists, and after the electric vehicle 3 arrives at the destination in the situation where the traffic flow exists. The reachable range is calculated when the destination is set as the next starting point.

  The road network model 27 is a model simulating a road network and is used for a travel simulation by the traffic flow simulation program 26. FIG. 4 is a schematic diagram showing the contents of the road network model 27. The road network model 27 includes a link 28 and a node 29, and the road network is expressed by the link 28 and the node 29. The node 29 represents an intersection, and the link 28 represents a road connecting the two intersections (that is, a road connecting the nodes 29). Information indicating the structure of the road (for example, information indicating the number of lanes, the presence / absence and number of right / left turn lanes, etc.) is set for each link 28. In the node 29, information indicating the structure of the intersection (information indicating whether or not a traffic light is installed) is set. Further, the altitude can be set for each node 29, and the gradient of the road corresponding to the link 28 connecting the two nodes 29 can be determined from the difference in altitude between the two adjacent nodes 29. By determining the slope of the road corresponding to the link 28, it is possible to accurately calculate the amount of power consumed by the electric vehicle 3 when traveling on the road. Further, the road network model 27 can be set with weather (sunny, rain, snow) and temperature. This makes it possible to estimate the amount of power consumed by the vehicle auxiliary equipment (air conditioner, heater, wiper, etc.) installed in the electric vehicle 3, and contributes to accurately calculating the amount of power consumed by the electric vehicle 3. To do.

  As with the host computer 1, the traffic flow simulator 2 is not implemented as a single computer, but may be implemented as a series of computing resources (network, server, storage, application) that realize cloud computing. Good.

  Next, the operation of the EV management system 10 according to the present embodiment, particularly data processing in the host computer 1 and the traffic flow simulator 2 will be described. In the present embodiment, the EV information providing server operating on the host computer 1 displays information indicating whether or not the electric vehicle 3 can reach the destination from the departure place (may be the current location). To provide. In addition, the EV information providing server displays a reachable range display screen that displays a reachable range of the electric vehicle 3 when the electric vehicle 3 arrives at the destination and then departs from the destination as the next starting point. An operation of providing display data for display to the user terminal 4 is performed. The user terminal 4 receives the display data and displays a reachable range display screen.

  One feature of this reachable range display screen is that a point (hereinafter referred to as “arrival”) that has been confirmed to be reachable when the electric vehicle 3 departs from the destination as the next departure point by a travel simulation by the traffic flow simulator 2. It is generated so that it can be visually recognized. As an example, when the electric vehicle 3 arrives at the destination and then arrives at each of the reachable points after reaching the destination, the SOC of the battery reaches a specific value (at 0%). It may be determined as a point that may be). In one embodiment, the specific value is set to 0% (i.e., the remaining battery power is zero). In this case, in the reachable point, when the electric vehicle 3 arrives at the destination and then starts again with the destination as the next starting point, the remaining electric energy of the battery of the electric vehicle 3 becomes zero (that is, It will be defined as a lack point where the SOC is 0%). An example of such a reachable range display screen is shown in FIG. 11 (details will be described later).

  According to such a reachable range display screen, the EV user can know in detail the reachable range from the destination when the electric vehicle 3 arrives at the destination and tries to move further. This is useful for EV users in determining actions that can be performed after reaching the destination.

  Hereinafter, the operation of the host computer 1 as an EV information providing server will be described in detail. FIG. 5 is a functional block diagram showing an example of the operation of the host computer 1 as an EV information providing server.

  The user terminal 4 has a function of sending a reachability determination request 41 for inquiring whether the electric vehicle 3 can arrive at the destination to the host computer 1 in response to an operation by the EV user. When the EV information providing server is a Web server, such a function may be realized by accessing a Web site provided by the EV information providing server using the Web browser of the user terminal 4. The reachability determination request 41 includes user information and destination information indicating the destination. The user information includes a vehicle ID that identifies the electric vehicle 3. When the user desires to know the current position of the electric vehicle 3 (current position) and whether the electric vehicle 3 can reach the destination with respect to the current SOC, the reachability determination request 41 indicates that May be included. In the case where the electric vehicle 3 located at a specific departure location at a specific departure time departs from the departure location with a specific SOC, it is desired to know whether the electric vehicle 3 can reach the destination. The reachability determination request 41 may include information indicating that, departure time information indicating the departure time, departure point information indicating the position of the departure point, and SOC information indicating the specific SOC. For example, when a full charge is performed at a specific charge station and it is desired to know whether or not the destination can be reached, the reachability determination request 41 indicates that the departure position indicating the position of the charge station and the SOC are 100%. It is generated so as to include SOC information indicating.

  Upon receiving the reachability determination request 41, the host computer 1 performs input information processing 31. Specifically, in the input information processing 31, the EV management database 18 is searched using the vehicle ID included in the user information of the reachability determination request 41, and the latest probe of the electric vehicle 3 corresponding to the vehicle ID. Information 43 is acquired. In FIG. 5, user information used for searching the EV management database 18 is indicated by reference numeral 42. The acquired latest probe information 43 includes information indicating the current SOC of the electric vehicle 3 and current location information indicating the current position of the electric vehicle 3. In the input information processing 31, a simulation request 44 including the information obtained by the input information processing 31 (that is, the reachability determination request 41 and the latest probe information 43) is created, and the simulation request 44 is input to the simulation input data. It is delivered to the creation process 32.

  In the simulation input data creation process 32, input data 45 having a data format suitable for the traffic flow simulator 2 is created based on the simulation request 44. The input data 45 includes departure point information indicating the position of the departure point, destination information indicating the position of the destination, and SOC information indicating the SOC of the electric vehicle 3 at the departure point. The input data 45 is delivered to the traffic flow simulator 2.

  Here, the creation method of the input data 45 differs depending on the contents of the reachability determination request 41 included in the simulation request 44. When the reachability determination request 41 indicates that the current position of the electric vehicle 3 (current position) and that it is desired to know whether the electric vehicle 3 can reach the destination with respect to the current SOC, Departure point information is generated so as to indicate the current position of the electric vehicle 3 indicated in the probe information, and SOC information of the input data 45 is generated so as to indicate the SOC indicated in the latest probe information. In other words, the input data 45 is generated to determine whether the current position of the electric vehicle 3 is the starting point and whether the destination can be reached with the current SOC. On the other hand, when the reachability determination request 41 indicates that it is desired to know whether the electric vehicle 3 can reach the destination with respect to the position of the specific electric vehicle 3 (departure position) and the specific SOC, Departure point information is generated to indicate the specific position, and SOC information of the input data 45 is generated to indicate the specific SOC. That is, when the specific position is the starting point and the SOC of the electric vehicle 3 is the specific SOC at the starting point, the input data 45 is generated for determining whether the destination can be reached.

  The traffic flow simulator 2 performs a travel simulation based on the delivered input data 45 and returns simulation result data 46 indicating the result of the travel simulation to the host computer 1. In the travel simulation, a road network model 27 stored in the storage device 25 of the traffic flow simulator 2 is used.

  FIG. 6 is a flowchart showing processing by the traffic flow simulator 2. First, a travel simulation is performed (step S01), and when the electric vehicle 3 has an SOC at the departure point indicated in the departure point information that is indicated by the SOC information, the destination information is obtained from the departure point. It is determined whether or not the destination shown in (2) can be reached (step S02). When it is determined that the destination cannot be reached in the travel simulation, a point where the SOC of the battery of the electric vehicle 3 is 0% is recorded (step S09), and information indicating that the destination cannot be reached, And the simulation result data 46 are produced | generated so that the lack point information which shows a lack point may be included. The power failure point information may include a travel time necessary for traveling from the departure point to the power loss point. In this case, the user terminal 4 displays that the destination cannot be reached and the lack point obtained by the traveling simulation.

  On the other hand, when it is determined that the destination can be reached, the processes of steps S03 to S08 are performed. In the processing of steps S03 to S08, after the electric vehicle 3 arrives at the destination, processing is performed to calculate a point that can be reached when the destination departs from the destination as the next departure point (that is, a reachable point). . Here, the number of reachable points calculated in steps S03 to S08 is plural, and the plurality of reachable points are calculated so as to be located in various directions with respect to the destination and surround the destination. Is done. Hereinafter, the processing of steps S03 to S08 will be described.

  First, the destination indicated in the destination information of the input data 45 is set as the starting point (next starting point) in the next travel simulation (step S03). Further, a plurality of next destination ranges are set so as to surround the next departure point (that is, the destination indicated in the destination information of the input data 45). Here, the next destination range is a range of positions set as destinations in the next traveling simulation. It should be noted that the next destination range is automatically set by the traffic flow simulator 2 and is not designated by the user. As will be understood from the following description of the processing, the next destination range is only a range set for selecting a destination set temporarily for calculating the reachable point. However, the number of the next destination range to be set may be variably adjusted by the user.

  FIG. 7 shows an example of the next destination range set in step S03. In step S01, a travel simulation is performed to determine whether the destination 51 can be reached from the departure point 51. In step S02, it is determined that the destination 52 can be reached from the departure point 51 on the route 53.

  In this case, a plurality of next destination ranges 54 are set radially so as to surround the destination 52 (that is, the next departure place). Here, the next destination range 54 is sufficiently away from the next departure point, and is set to a position where the electric vehicle 3 is not expected to reach a position within the next destination range from the next departure point. In one embodiment, the next destination range 54 may be set as a certain size circle or regular polygon. In the example of FIG. 7, each next destination range 54 is set as a circle whose center is located on a circle 60 centered on the destination 52. Here, the radius of the circle 60 is determined based on the SOC of the electric vehicle 3 at the destination 52, and compared with the length of the line segment corresponding to the possible travel distance from the SOC of the electric vehicle 3 at the destination 52. Set sufficiently large. Most simply, the radius of the circle 60 may be determined by multiplying the SOC of the electric vehicle 3 at the destination 52 by a predetermined coefficient.

  Subsequently, it is determined whether or not the node 29 of the road network model 27 exists in each next destination range 54 (step S05). If there is a next destination range 54 where no node 29 exists, the next destination range 54 is adjusted (step S06). The next destination range 54 is adjusted by changing the size or position of the next destination range 54. For example, when the next destination range 54 is set as a circle, the next destination range 54 may be adjusted by changing the position of the center of the circle and / or the radius of the circle. When the next destination range 54 is set as a regular polygon, the adjustment of the next destination range 54 is performed by changing the position of the center of the regular polygon and / or the distance from the center of the regular polygon to the vertex. It may be done by changing. The adjustment of the next destination range 54 is repeated until each next destination range 54 is set so that at least one node 29 is included in each next destination range 54.

  After the next destination range 54 is determined so that at least one node 29 is included in each next destination range 54, the next destination 55 is set for each next destination range 54 as shown in FIG. It is determined (step S07). When only a single node 29 exists in a certain next destination range 54, that node 29 is determined as the next destination 55. On the other hand, when there are a plurality of nodes 29 in a certain next destination range 54, one of them is selected as the next destination 55. As a result, the next destination 55 is also determined so as to surround the destination 52 (next departure place).

  Subsequently, a travel simulation for simulating the travel of the electric vehicle 3 from the next departure point (that is, the destination 52) to the next destination 55 is performed (step S08). As the SOC at the next departure point, the SOC of the electric vehicle 3 at the destination 52 obtained by the travel simulation at step S01 is used.

  Here, in step S04, since the next destination range is determined sufficiently away from the next destination, in the traveling simulation in step S08, there is an electric shortage point (between the next departure point and the next destination). That is, the point at which the SOC becomes 0%) should be determined. A point on the route from the next departure point to the electricity shortage point is a point that is determined to be reachable when the departure point is the next departure point. Any one of the points on the route from the next departure point to the power failure point (including the power loss point except for the next departure point) is calculated as a “reachable point”.

  The reachable point may be determined as a shortage point, or may be determined as a point where the SOC becomes a specific value (for example, 20%). In addition, the reachable point may be determined as a point that can be reciprocated from the next destination (that is, a point that can be reached from the next destination and then returned to the next destination). In addition, the reachable point is determined as a point that is reached on the route from the next departure point to the power loss point and when a predetermined elapsed time (for example, 30 minutes) has passed since the departure from the next departure point. May be. Further, the reachable point may be determined as a point that is reached on the route from the next departure point to the electricity shortage point and departs from the next departure point and travels a predetermined travel distance.

  FIG. 9 is a diagram illustrating an example of the reachable point 57 determined for each next destination 55. A point that can be reached through the route 56 from the next departure point (that is, the destination 52) is determined as the reachable point 57. In the travel simulation of step S08, the route 56 that can reach each reachable point 57 from the next departure point is specified, and the travel time required to reach each reachable point 57 from the next departure point and / or The travel distance is also calculated.

  The reachable point 57 calculated by the travel simulation in step S08 and related information (for example, the SOC at the reachable point 57, the route 56 that can reach each reachable point 57 from the next departure point, and the next The travel time required to reach each reachable point 57 from the departure point is recorded (step S09), and the processing by the traffic flow simulator 2 is completed.

  Further, the result of processing by the traffic flow simulator 2 is returned to the host computer 1 as simulation result data 46. The simulation result data 46 includes arrival availability information indicating whether or not the electric vehicle 3 can reach the destination indicated in the destination information from the departure location indicated in the departure location information. . In addition, the simulation result data 46 indicates a reachable point (a point determined to be reachable when the electric vehicle 3 has arrived at the destination and then departed from the destination as the next departure point). Includes possible point data. The simulation result data 46 includes information related to the reachable point 57 (for example, the SOC at the reachable point 57, the route 56 that can reach each reachable point 57 from the next departure point, and the next departure point). The travel time required to reach each reachable point 57) may be included. Further, the simulation result data 46 may include information indicating the position of the next destination 55 set in step S07.

  Returning to FIG. 5, when the simulation result data 46 is returned to the host computer 1, a map display process 33 for generating display data 47 for displaying the reachable range display screen is performed. Here, as described above, the reachable range display screen is a range in which the electric vehicle 3 can reach when the electric vehicle 3 arrives at the destination and then departs from the destination as the next departure point. This is the screen to be displayed. The display data 47 is sent to the user terminal 4, and the reachable range display screen corresponding to the display data 47 is displayed on the user terminal 4.

  FIG. 10 is a diagram illustrating an example of a reachable range display screen. The reachable range display screen of FIG. 10 shows a departure point 51, a destination 52, a route 53 connecting the departure point 51 and the destination 52, a reachable point 57, and a boundary line 58. In the example of FIG. 10, the boundary line 58 is illustrated as a closed curve that passes through the reachable point 57 and surrounds the destination 52 (ie, the next departure point). The closed curve used as the boundary line 58 is most simply configured by connecting line segments connecting adjacent reachable points 57. The closed curve used as the boundary line 58 may be drawn as an arbitrary approximate curve, for example, a Bezier curve having the reachable point 57 as a control point. The order of the Bezier curve may be determined as appropriate in consideration of the accuracy of the boundary line 58 and the number of reachable points 57. In FIG. 10, the boundary line 58 is configured by connecting adjacent reachable points 57 to a curve formed by connecting a plurality of line segments.

  Further, the reachable range that can be reached from the next departure place may be displayed on the reachable range display screen. In this case, the reachable range may be displayed by displaying the inside of the boundary line 58 in a color tone different from that of the portion outside the boundary line 58.

  The boundary line 58 is not necessarily displayed. If a sufficient number of reachable points 57 are shown, the user can actually recognize the reachable range that can be reached from the next departure point. Further, only the boundary line 58 is displayed, and the mark indicating the reachable point 57 may not be shown. Even in this case, the reachable point 57 can be visually recognized as the position where the road constituting the route 56 and the boundary line 58 intersect.

  FIG. 11 shows another example of the reachable range display screen. As shown in FIG. 11, the next destination 55 determined in step S07 may be displayed on the reachable range display screen. However, as described above, since the next destination 55 is a point automatically set by the traffic flow simulator 2 (not a point set by the user), the necessity of displaying the next destination 55 is not necessary. Note also that it is thin.

  FIG. 12 shows still another example of the reachable range display screen. In the travel simulation of step S08 of the present embodiment, for each lack point, a plurality of reachable points are determined under different conditions between the next departure point and the lack point, and are shown on the reachable display screen. Also good. In this case, the reachable range may be displayed on the reachable range display screen as a chart similar to the radar chart by connecting the reachable points corresponding to the same condition with a closed curve. Parameters used for determining the reachable point include the SOC, the elapsed time after the departure from the next departure place, and the travel distance after the departure from the next departure place.

  In the example of FIG. 12, in the travel simulation, a point where the SOC is a first value (for example, 10%) is determined as the reachable point 571, and the SOC is a second value (for example, different from the first value). , 20%) is determined as the reachable point 572. The latitude and longitude information of the reachable points 571 and 572 is stored in the storage device 25 of the traffic flow simulator 2. The boundary line 581 is illustrated as a closed curve that passes through the reachable point 571, passes through the reachable point 57, and surrounds the destination 52 (ie, the next departure point). Similarly, the boundary line 582 is illustrated as a closed curve that passes through the reachable point 572 and surrounds the destination 52 (ie, the next departure point). In the example of FIG. 12, reachable points are calculated for two SOC values, but reachable points may be calculated for three or more SOC values.

  A similar reachable range display screen may be created for the elapsed time after departure from the next departure place. Using FIG. 12 as an example, a point whose elapsed time after departure from the next departure point is a first value (for example, 1 hour) is determined as the reachable point 571, and the elapsed time is the first value. A point having a second value different from (for example, 45 minutes) is determined as the reachable point 572. Furthermore, a similar reachable range display screen may be created for the travel distance after starting from the next departure place. A point where the travel distance after the departure from the next departure point is the first value (for example, 20 kilometers) is determined as the reachable point 571, and the second value (for example, the travel distance is different from the first value) , 15 km) is determined as the reachable point 572.

  Thus, the data processing performed in the host computer 1 and the traffic flow simulator 2 to display the reachable range display screen on the user terminal 4 is completed.

  According to the operation of the EV management system 10 of the present embodiment as described above, the user is provided with information as to whether the electric vehicle 3 can arrive at the destination, and after the destination arrives at the destination, A reachable range display screen showing the reachable range of the electric vehicle 3 when the ground is set as the next departure place can be provided to the user. The reachable range display screen displays reachable points that are determined to be reachable by simulation in consideration of the actual travel route and travel state. This is a determination of actions that can be performed after reaching the destination. More useful.

It should be noted here that a plurality of reachable points are obtained by a travel simulation, and therefore the linear distances from the destination (next departure point) may not be the same.
That is, two of the plurality of reachable points may have different linear distances from the destination.
In such a case, the closed curve constituting the boundary line 58 is not displayed as a circle.
The method of calculating the reachable distance when departing from the destination based on the SOC after reaching the destination cannot calculate the reachable point in detail. After reaching the ground, it is only possible to display the reachable range as a circle when leaving the destination. Thus, in this embodiment, the reachable range display screen showing the more detailed reachable range is obtained in consideration of the actual travel route and the travel state. This contributes to providing the user with more useful information for determining actions that can be performed after reaching the destination.

  In the calculation of the reachable point 57 and the generation of the reachable range display screen according to the above-described procedure, when the next destination range 54 is set in an area where no road exists, for example, at sea, in step S04. In addition, the reachable range may be displayed narrower than the range that is inherently reachable from the next departure place. FIG. 13 is a diagram illustrating such a problem.

  For example, in FIG. 13, it is assumed that the next destination range 54A is set on the sea. In this case, since the node 29 of the road network model 27 does not exist in the next destination range 54A, it is necessary to adjust the next destination range in steps S05 and S06. Then, as a result of the adjustment of the next destination range, as shown in FIG. 13, the next destination range is set between the next destination range 54A initially set and the next departure point (that is, the destination 52). And may be set at a position near the coastline. In such a case, the next destination 55A corresponding to the next destination range 54A is not sufficiently separated from the next departure point (that is, the destination 52), and the next destination is determined from the next departure point by the travel simulation in step S08. The result that the ground 55A is reachable may be obtained.

  At this time, if the next destination 55A is determined as the reachable point and the boundary line 58 is determined using the next destination 55A and the adjacent reachable point 57A, the reachable range may be underestimated. This is because the area 59 in the triangle whose apex is the adjacent reachable point 57A, the center of the next destination range 54A, and the next destination 55A originally includes an area that can be reached from the next departure place. Because you get.

FIG. 14 is a conceptual diagram illustrating a method for solving the problem of underestimation of the reachable range according to an embodiment. A next destination range is set between the first set next destination range 54A and the next departure point (ie, destination 52), the next destination 55A is selected from the next destination range, and Suppose that the travel simulation in step S08 has obtained a result that the next destination 55A can be reached from the next departure point. In this case, a position between the next destination 55A and the position of the next next destination range 54A set first, more specifically, the position of the next destination 55A and the first next destination range 54A (for example, When the next destination range 54A is a circle or a regular polygon, a virtual reachable position 61 is set at a position above the line segment 62 connecting the center 54Aa thereof. The virtual reachable position 61 is preferably determined so that the distance ΔL between the virtual reachable position 61 and the next destination 55A satisfies the relationship of the following formula (1):
ΔL = {L1 / (SOCo2-SOCd2)} × SOCD2 (1) where L1 is a travel distance along the route 56A from the destination 52 (next departure point) to the next destination 55A, SOCo2 is the SOC calculated when the vehicle arrives at the destination 52 calculated in the travel simulation in step S01, and SOCd2 is the SOC at the next destination 55A calculated in the travel simulation in step S08.

In this case, the boundary line 58 may be determined as a curve (closed curve) passing through the virtual reachable position 61 and the adjacent reachable point 57A. In FIG. 13, a portion 58 a between the adjacent reachable point 57 </ b> A and the virtual reachable position 61 in the boundary line 58 is configured by a line segment connecting the reachable point 57 </ b> A and the virtual reachable position 61. The case is illustrated.
The part 58a of the boundary line 58 may be a curved line.

  By determining the virtual reachable position 61 and the boundary line 58 in this way, underestimation of the reachable range can be suppressed. Specifically, according to the method for determining the virtual reachable position 61 and the boundary line 58 described above, the triangular area 63 having apexes of the adjacent reachable point 57A, the next destination 55A, and the virtual reachable position 61 is It will be illustrated as an area inside the boundary line 58 (ie, a reachable area). The region 63 is a region that is actually considered to be reachable. Therefore, the underestimation of the reachable range can be suppressed by including the region 63 as a region inside the boundary line 58. In addition, when the result that it can arrive at the next destination 55A is obtained by the traveling simulation of step S08, the calculation of the virtual reachable position 61 and the determination of the boundary line 58 are performed by such a procedure. There is no need.

  Although the embodiment of the present invention has been specifically described above, the present invention is not limited to the above-described embodiment. It will be apparent to those skilled in the art that the present invention may be practiced with various modifications.

  For example, in the above description, an embodiment is described in which the host computer 1 and the traffic flow simulator 2 perform data processing using different hardware resources. However, the host computer 1 and the traffic flow simulator 2 have the same hardware. It may be implemented as a system using hardware resources.

  In the above description, an embodiment in which the reachable range display screen is generated by using the host computer 1 and the traffic flow simulator 2 has been described. The navigation apparatus) can perform calculations performed in the host computer 1 and the traffic flow simulator 2. However, when the traffic flow simulator 2 is used as in the present embodiment, a traffic flow generated when a large number of vehicles (including the electric vehicle 3) travel on the road is simulated, and the traffic flow exists. It is possible to determine whether or not the electric vehicle 3 can reach the destination depending on the situation. In addition, in the present embodiment, in a situation where there is a traffic flow, after the electric vehicle 3 arrives at the destination, the reachable range display screen showing the reachable range when the destination departs as the next starting point is displayed. Can be generated. These contribute to providing more accurate information.

  In the above embodiment, an example in which an electric vehicle is used as the electric vehicle is given. However, the present invention uses a battery such as a battery-powered motorcycle and the electricity stored in the battery. It should be noted that the present invention can be applied to an electric vehicle that drives a drive wheel.

1: Host computer 2: Traffic flow simulator 3: Electric vehicle 4: User terminal 4a: Personal computer 4b: Mobile terminal 5: Wireless communication network 6: Network 10: EV management system 11: Computing device 12: Input device 13: Display device 14: External interface 15: Storage device 16: EV management server software 17: EV information providing server software 18: EV management database 21: Computing device 22: Input device 23: Display device 24: External interface 25: Storage device 26: Traffic flow Simulation program 27: road network model 28: link 29: node 31: input information processing 32: simulation input data creation processing 33: map display processing 41: reachability determination request 42: user information 4 3: Probe information 44: Simulation request 45: Input data 46: Simulation result data 47: Display data 51: Origin 52: Destination 53: Route 54, 54A: Next destination range 54Aa: Center 55: Next destination 55A: Next destination 56: Route 56A: Route 57: Reachable point 57A: Reachable point 58: Boundary line 58a: Part 59: Area 60: Circle 61: Virtually reachable position 62: Line segment 63: Area

Claims (5)

A user terminal that communicates with a device for providing information to an electric vehicle,
The user terminal is
A request for determining whether or not the electric vehicle can reach the destination from the certain point from the SOC (state of charge) of the electric vehicle at a certain point;
When the information providing apparatus determines that the destination can be reached, a plurality of reachable points that can be reached when the electric vehicle departs the destination after reaching the destination. Display data to be received from the information providing device,
A user terminal that displays a reachable range from the destination on a screen by connecting adjacent reachable points among the plurality of reachable points based on the received display data. 2. When two of a plurality of reachable points have different distances from the destination, the reachable range is displayed on a screen by connecting adjacent reachable points in a non-circular shape. The listed user terminal. The user terminal according to claim 1, further adding routes that reach the plurality of reachable points from the destination to display the reachable range on a screen. The user terminal according to claim 3, further adding a route from the certain point to the destination to display the reachable range on a screen. The user terminal according to any one of claims 1 to 4, wherein an inner portion of the reachable range is displayed in a color tone different from that of the outer portion of the reachable range.

Images