JP6625482B2 - Range display device, range display method and program - Google Patents

Description

  The present invention relates to a range display device, a range display method, and a program for displaying a range of a vehicle.

  2. Description of the Related Art There is known a technology for displaying a cruising range of a vehicle in a spider web shape on a map (for example, see Patent Document 1). Patent Literature 1 discloses that a plurality of pieces of road map data having different degrees of detail are properly used in accordance with remaining cruising capacity such as remaining battery power to determine a cruising route, thereby reducing a load when calculating the cruising route by calculation. The techniques obtained are disclosed. Specifically, when the remaining battery charge is less than the first threshold value (10%), the most detailed third road map data is selected. When the remaining battery charge is equal to or more than the first threshold value (10%) and less than the second threshold value (20%), the third road map data is selected. It is possible to select the second road map data having a lower level of detail than the three road map data, and to select the first road map data having a lower level of detail than the second road map data at a second threshold (20%) or more. (Paragraphs [0047] to [0049]). As a result, the calculation load can be reduced as compared with the case where a cruising route is obtained only by the third road map data having a high degree of detail.

JP 2014-35215 A

  However, when obtaining the cruising range of a moving vehicle, the same processing (for example, the above-described calculation) is repeatedly (for example, periodically) performed in response to the movement of the vehicle. Therefore, as described above, although the processing load is reduced by using the road map data with a low level of detail, the same processing must be repeatedly performed for a wide range of road networks in the road map data. The processing load when obtaining the possible range is still large.

  The present invention has been made in view of such circumstances, and a cruising range display device, a cruising range display method, and a program that can drastically reduce a processing load when obtaining a cruising range of a vehicle. Is provided.

  A cruising range display device according to the present invention is a cruising range display device that displays a cruising range of a vehicle, and includes a plurality of nodes constituting a road network and each of the plurality of nodes at a past time. Storage means for storing prediction information associated with a predicted cruising capacity value; reading the prediction information from the storage means to obtain a predicted cruising capacity value at the past time; Calculating the rate of change of the remaining surviving power up to, and calculating the predicted remaining capacity of the node at the current time using the calculated rate of change of the remaining power and the predicted remaining capacity at the past time. Information processing means for generating cruising range information representing a cruising range at the current time using the calculated predicted surviving capacity value at the current time; and A configuration and display means for displaying a cruising range at the current time based on the cruising range information.

  With such a configuration, the current time of the nodes constituting the road network using the change rate of the cruising capacity from the past time to the current time and the predicted cruising capacity value at the past time stored in advance in the past. Is calculated, and the cruising range information indicating the cruising range at the current time is generated using the calculated predicted cruising remaining value at the current time, and the generated cruising range information is generated. Is displayed on the display means at the present time. For this reason, it is possible to obtain the predicted cruising capacity value of each node at the current time without newly obtaining the predicted cruising capacity value from the beginning. In other words, the process can be simplified when calculating the cruising range as compared with the case where all are newly obtained from the beginning.

  In the cruising range display device according to the present invention, the information processing means determines whether the vehicle is moving from the past time to the current time, and determines that the vehicle is not moving. The present invention may be configured such that a ratio of a change in the actual remaining fuel amount of the vehicle from the past time point to the current time point is set as a change rate of the cruising survivability.

  With such a configuration, when it is determined that the vehicle is not moving, the rate of change of only the actual fuel remaining amount is set as the rate of change of the cruising surviving power. And the processing load can be further reduced.

  In the cruising range display device according to the present invention, the cruising range is a first cruising range that is within a range of a predetermined angle with respect to the moving direction of the vehicle, and a second cruising range that is outside the range of the predetermined angle. The information processing means determines whether the vehicle is moving from the past time to the current time, and when it is determined that the vehicle is moving, Setting the first cruising range using the estimated cruising remaining power value at the current time, and performing the cruising on the periphery of the cruising range at the past time corresponding to outside the range of the predetermined angle. A correction area corrected according to the rate of change of the remaining power is set as the second cruising range, and cruising range information representing the first cruising range and the second cruising range is generated. be able to.

  According to such a configuration, the vehicle has a first range in which the range is within a range of a predetermined angle with respect to the moving direction of the vehicle, and a second range in which the range is outside the range of the predetermined angle, If it is determined that the vehicle is moving, the first cruising range is set using the estimated cruising surplus value at the current time, and the first cruising range is set outside the range of the predetermined angle with respect to the moving direction of the vehicle. A correction area obtained by correcting the peripheral portion of the cruising range at a past time point corresponding to the rate of change in cruising survivability is set as the second cruising range, and the first cruising range and the second cruising range Since the range information indicating the range is generated, the second range can be simply and easily obtained using the range at the past time, and the range at the past time is used. Processing load is further reduced compared to Rukoto can.

  In the cruising range display device according to the present invention, the information processing means may be configured such that a formation region formed based on a node having the predicted cruising surplus value equal to or larger than a predetermined value is set as the cruising range. .

  With such a configuration, the formation area formed based on the node whose predicted cruising surplus value is equal to or larger than the predetermined value is the cruising range. Therefore, it is possible to set the predetermined value appropriately to allow a margin in the cruising range. it can.

  A cruising range display method according to the present invention is a cruising range display method for displaying a cruising range of a vehicle, wherein a plurality of nodes constituting a road network and each of the plurality of nodes at a past time point are displayed. Obtaining prediction information associated with the predicted remaining capacity value, calculating the rate of change of the remaining capacity from the past time to the current time, and calculating the change rate of the calculated remaining capacity and the prediction at the past time Calculating a predicted surviving capacity value of the node at the current time using the surviving capacity value, and representing the range at the current time using the calculated predicted surviving capacity value at the current time. An information generating step of generating range information, and a display step of displaying the range at the current time based on the range information generated by the information generating step. It is obtain things.

  A program according to the present invention is a program that causes a computer to execute a process in a cruising range display device that displays a cruising range of a vehicle, and includes a plurality of nodes configuring a road network and each of the plurality of nodes. Obtain prediction information associated with a predicted cruising capacity value at a past time, calculate a rate of change of cruising capacity from the past time to the present time, and calculate the rate of change of the calculated cruising capacity and the past Calculating a predicted remaining capacity value of the node at the current time using the predicted remaining capacity value at the time point, and using the calculated predicted remaining capacity value at the current time point at the current time point. An information generating step of generating cruising range information representing a cruising range; and the cruising range at the current time based on the cruising range information generated by the information generating step. It is intended to execute a display control step of displaying the coverage area on the display unit to the computer.

  ADVANTAGE OF THE INVENTION According to the cruising range display device, the cruising range display method, and the program according to the present invention, when determining the cruising range, the processing can be simplified as compared with the conventional case, so that the cruising range of the vehicle is obtained. Can be reduced when processing is determined.

It is a block diagram showing an example of composition of a range display device concerning an embodiment of the invention. It is a figure for explaining an example of composition of a road network. It is a figure showing an example of composition of prediction information. 5 is a flowchart illustrating an example of a flow of a process performed by the cruising range display device according to the embodiment of the present invention. It is a figure for explaining an example of setting of a cruising range. FIG. 8 is a diagram for explaining an example of setting a cruising range when a vehicle is not moving. FIG. 7 is a diagram for explaining an example of setting a cruising range when a vehicle is moving. It is a figure showing an example of a display of a cruising range.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  A cruising range display device (hereinafter abbreviated as a display device) 100 shown in FIG. 1 is an in-vehicle device mounted on a vehicle, and displays a cruising range of the vehicle (a range in which the vehicle can travel from a current position). Is what you do. The display device 100 may be an electronic device such as a smartphone and a tablet used in the vehicle. As illustrated, the display device 100 includes a processing unit 10, a receiving unit 11, a storage unit 12, a display unit 13, and an operation unit 14.

  The processing unit 10 (information processing means according to the present embodiment) is configured by a computer unit (for example, including a CPU). The processing unit 10 is connected to a receiving unit 11 so that the processing unit 10 can acquire various information received by the receiving unit 11. The receiving unit 11 is configured to be able to receive position information such as GPS (Global Positioning System) information and congestion information such as VICS (registered trademark). For example, the position information has a configuration in which attributes such as a time such as a current time and a vehicle position (latitude and longitude) are associated, and the traffic congestion information includes a time such as a transmission time and an attribute such as a congested road around the vehicle. It has an associated configuration.

  The processing unit 10 is connected to a storage unit 12 (a storage unit according to the present embodiment) such as a hard disk drive that stores various information such as information used for processing in the processing unit 10 and a program. The storage unit 12 stores map information (electronic map data) as information used for processing in the processing unit 10. The map information may be stored in the storage unit 12 in advance, or may be acquired and updated via the network by the receiving unit 11 under the control of the processing unit 10 and stored in the storage unit 12. It may be.

  The map information has road information on a road network as shown in FIG. The road information includes link information representing road links (L1, L2,...) On the electronic map and information of end points such as a start point and an end point of the road link associated with each link information as information constituting the road network. Node information indicating the nodes (N1, N2,...). For example, each link information includes attribute information on road links such as a road ID, a road name, a road type, a speed limit, a road length, a road width, and a road gradient. Each node information includes a node ID and a node name (for example, , Intersection names, etc.), node types (eg, intersections, dead ends, etc.), and node coordinate values (latitude and longitude).

  The storage unit 12 shown in FIG. 1 stores, as information used for processing in the processing unit 10, prediction of each of a plurality of nodes constituting the road network and each node generated in processing to be described later, as shown in FIG. The prediction information having a configuration in which the remaining fuel amount and the congestion consumption amount of each node are associated with each other is stored. The predicted fuel remaining amount is basically static information that does not change over time, and remains when it is assumed that the vehicle has traveled from the current position to the position corresponding to each node (without considering the congestion consumption amount). (The ratio (%) of the remaining fuel amount when the full state is assumed to be 100%). The traffic congestion amount is dynamic information that changes over time, and indicates the fuel consumption amount that is consumed more than usual due to traffic congestion (the ratio (%) of the fuel consumption amount when the full state is set to 100%). ing. The processing unit 10 reads the prediction information from the storage unit 12 and, assuming that the vehicle has traveled from the current position to the position corresponding to each node (consideration of congestion consumption), the fuel predicted to remain The remaining amount (the ratio (%) of the remaining amount of the fuel when the full state is set to 100%) can be acquired (calculated) as the predicted cruising remaining power value. For example, in the case of the node N2 in FIG. 3, the predicted cruising surplus value is 25% (predicted fuel remaining amount) -5% (congestion consumption amount) = 20% (predicted cruising remaining power value). The generation of the prediction information will be described in detail when describing processing by the processing unit 10 described later.

  As shown in FIG. 1, the processing unit 10 further includes a display unit 13 configured by an LCD or the like, and a touch panel on the display unit 13, and an operation unit used to input instructions for processing and various information. 14 are connected. The display unit 13 (display means according to the present embodiment) displays various information such as an image representing a cruising range of the vehicle based on processing (described later) in the processing unit 10 under the control of the processing unit 10. .

  The processing unit 10 is connected to a vehicle information management device 200 which is an external device, and is configured so that the processing unit 10 can acquire various information output from the vehicle information management device 200. Specifically, the vehicle information management device 200 responds to a request from the processing unit 10 to indicate a remaining fuel amount value (a battery remaining amount value in the case of an electric vehicle) of a vehicle running fuel actually measured by a sensor. It outputs various information related to the vehicle, such as information and fuel efficiency information relating to fuel efficiency (electricity in the case of an electric vehicle) representing the cruising distance characteristics of the vehicle. The fuel efficiency information may be acquired by the receiving unit 11 via a network under the control of the processing unit 10 or may be stored in the storage unit 12 in advance. Further, the display device 100 may be configured to be obtained by input or selection by the user using the operation unit 14. Further, the vehicle type of the vehicle may be determined, and fuel efficiency information corresponding to the determined vehicle type may be obtained. The vehicle type can be determined by acquiring vehicle type information indicating the vehicle type from the vehicle information management device 200. The vehicle type information may be acquired by the reception unit 11 or the operation unit 14 in the same manner as the fuel efficiency information.

  The display device 100 configured as described above performs the processing described below. When a function for displaying the cruising range is activated on the display device 100 by operating the operation unit 14 or the like, the processing unit 10 executes the processing described below in accordance with the procedure shown in FIG. Note that the processing unit 10 executes the following processing at an appropriate timing (for example, periodically using a clock function) in order to appropriately display the cruising range of the vehicle accompanying the movement. Here, the processing by the processing unit 10 may be performed by hardware, or may be realized by software using a program.

  First, the processing unit 10 acquires various types of information used for processing described later (S11). Specifically, the processing unit 10 controls the receiving unit 11 to obtain position information indicating the current position of the vehicle and congestion information indicating the congestion situation around the vehicle, and controls the storage unit 12 to obtain map information. At the same time, it requests the vehicle information management device 200 to provide information and acquires remaining amount information, fuel efficiency information, and the like.

  Next, the processing unit 10 controls the storage unit 12 to determine whether the prediction information is stored in the storage unit 12 (S12). Note that in the case of the first processing, the prediction information is not stored, and thus the determination is NO. In the case of the second and subsequent processes, the determination is YES. If it is determined in step S12 that the prediction information is not stored (NO), the processing unit 10 extracts a route starting from the current position of the vehicle from the road network of the map information, and The terminal node is specified (S13).

  Next, the processing unit 10 calculates the cruising distance of the vehicle using the remaining amount information, the fuel efficiency information, and the like (S14). At this time, the cruising range may be determined in consideration of items that affect the cruising range, such as road gradient, number of passengers, and weather. By adjusting the cruising distance according to each item in this manner, an accurate cruising distance can be calculated in accordance with each item. Then, the processing unit 10 calculates the predicted fuel remaining amount at the specified node by using the calculated cruising distance and the road information and the like, and associates the calculated predicted fuel remaining amount with the specified node to obtain the prediction information described above. Is generated and stored in the storage unit 12 (S15). At this time, the processing unit 10 determines the traffic congestion status of the extracted route based on the traffic congestion information, and if it is determined that the traffic is congested, sets the traffic congestion amount according to the traffic congestion level. The prediction information is generated by associating the quantity with the quantity.

  Here, an example of a procedure for extracting a route will be described with reference to FIG. The route is extracted by tracing the link L1 starting from the current position on the road network, storing the predicted fuel remaining amount and the congestion consumption amount at that time at the node N1, and setting the predicted cruising surplus value at that time to a predetermined value. If the value is equal to or more than 10% (in the present embodiment), the extraction target is extended to each link (link L2, L3, L4) connected to the node N1, and the extraction is performed at the subsequent nodes (nodes N2, N3, N4). This is performed by repeating the same procedure.

  In this way, the extraction of the route is repeatedly performed until the predicted cruising surplus value becomes less than the predetermined value (10%) when the vehicle is considered to have traveled the route based on the extracted road link. Therefore, the cruising route of the vehicle whose predicted cruising surplus value is equal to or more than the predetermined value (10%) is formed in a network shape that spreads radially around the current position. The predetermined value is appropriately set, and may be 0%. However, by setting the value to a value larger than 0%, it is possible to provide a margin for the actual cruising distance of the vehicle.

  Based on the extraction of the feasible route, the processing unit 10 stores the prediction information in step S15 and the predicted surviving value of the specified node is equal to or more than a predetermined value (10%) as illustrated in FIG. It is determined whether or not (S16). When it is determined that the predicted cruising surplus value is equal to or more than the predetermined value (10%) (YES in S16), the processing unit 10 determines whether all nodes that can be cruising routes have been selected (S17). If it is determined that all nodes have not been selected (NO), the process returns to step S13. If it is determined in step S16 that the predicted cruising surplus value is less than the predetermined value (10%) (NO), and if it is determined in step S17 that all nodes have been selected (YES), the processing unit 10 Generates range information indicating a range set based on the predicted remaining capacity value of each node (S18). Specifically, as shown in FIG. 5, the processing unit 10 forms nodes (N5, N7, N6,...) Whose predicted cruising remaining power value is a predetermined value (10%) by connecting them with a single stroke. Is set as the cruising range.

  By the way, as shown in FIG. 4, when it is determined in step S12 that there is prediction information (YES), the processing unit 10 reads and acquires the prediction information from the storage unit 12 to obtain each node in the previous processing. Is obtained (calculated) (S20), and then it is determined whether or not the vehicle has moved from the time of the previous process (past time according to the present embodiment) to the current time (S21). . When it is determined that the vehicle is not moving (NO in S21), the processing unit 10 uses the remaining fuel value (actual fuel remaining amount) that is the actual measurement value at the time of the previous process and at the current time. Then, the rate of change of the surviving power is calculated (S22). For example, if the vehicle is a gasoline-powered vehicle and the last fuel remaining value is 10 liters (100%) full tank and the current fuel remaining amount is 9 liters, the remaining cruising capacity is The rate of change is “−10%”. That is, 10% of the fuel is consumed depending on the idling state. Then, the processing unit 10 uses the calculated change rate to generate cruising range information indicating the cruising range at the current time (S23). For example, when the cruising range is set by the cruising route shown in FIG. 5 at the time of the previous processing and the rate of change of the cruising surviving power is “−10%”, FIG. As shown, the predicted cruising capacity value of each node is subtracted by 10%, and the predicted cruising capacity value at the current time is calculated. Then, the newly formed formation area is connected to the nodes (N2, N4, N3,...) Of which the calculated predicted remaining capacity value is the predetermined value (10%), and is set as the current operable range. Then, cruising range information indicating the cruising range is generated.

  On the other hand, as shown in FIG. 4, when it is determined in step S21 that the vehicle has moved (YES), the processing unit 10 selects a predetermined node (for example, a node closest to the current position of the vehicle). Then, the change rate of the surviving capacity is calculated using the predicted surviving capacity values of the selected node at the time of the previous processing and at the current time (S24). For example, when the predicted fuel remaining amount at the time of the previous process is 30% and the predicted fuel remaining amount at the present time is 25%, the change rate of the fuel remaining amount is “−”. 5% ".

  Next, the processing unit 10 determines whether or not the calculated change rate is equal to or greater than a threshold value (± 10% in the present embodiment) (S25), and determines that the calculated change rate is equal to or greater than the threshold value (± 10%) (YES). If it is determined, the process proceeds to step S13 to calculate a predicted remaining surviving force value on a new feasible route. As a result, even when the change rate is as large as the threshold value (10%) or more, the cruising range can be appropriately set. Although the flow is omitted here, if the rate of change is close to zero (for example, less than ± 5%), it is assumed that there is little change in the cruising range and the cruising range at the time of the previous processing is not changed to the current range. The cruising range at the time may be used. This can greatly simplify the processing. If it is determined in step S25 that the calculated rate of change is not equal to or greater than the threshold value (± 10%) (NO), the processing unit 10 determines, as shown in FIG. An area within a range of a predetermined angle with respect to the moving direction (for example, ± 45 ° with respect to the traveling direction as shown) is set as a first cruising range (S26), and mainly a rear area of the vehicle. A region outside the range of a predetermined angle with respect to the moving direction of the vehicle is set as a second cruising range (S27).

  Here, the first cruising range is set using the rate of change and the predicted cruising surplus value at the time of the previous processing, as in the processing in step S23 described above. Specifically, processing similar to the processing in step S23 is performed on the nodes within the above-described predetermined angle range. On the other hand, the second range is set by using the range in the previous process and correcting the range according to the rate of change. That is, as shown in FIG. 7, each end point T constituting the periphery of the cruising range in the previous process is corrected according to the rate of change of the cruising surplus (moving toward the current vehicle position (inward). The correction area formed by the reduction) is defined as a second cruising range. Note that the cruising range in the previous process can be obtained using the prediction information. Then, cruising range information representing a cruising range (the first cruising range and the second cruising range) combining the first cruising range and the second cruising range is generated (S28).

  After the generation of the cruising range information in steps S18, S23, and S28, the processing unit 10 controls the display unit 13 to set the cruising range as illustrated in FIG. 8 based on the generated cruising range information. The displayed image is displayed on the display unit 13 (S19), and the process ends. In FIG. 8, the thinnest line (thin line) indicates a road that is not a feasible route, and a line that is thicker than that indicates a feasible route. The boundary (two-dot chain line) indicating whether the vehicle is within the cruising range or whether the vehicle is traveling along the route may be classified according to the color, not the line type such as the line thickness. It may be performed for both the line type and the color difference. Further, more detailed display classification (for example, color classification) may be performed according to the predicted cruising remaining capacity value. Thereby, the user can easily grasp the relationship between the fuel consumption and the cruising distance.

  According to the display device 100 as described above, the predicted remaining capacity value at the past time (the time of the previous process) is used without newly obtaining the predicted remaining capacity value of each node at the current time from the beginning. You can ask. In other words, when calculating the cruising range, the processing can be simplified as compared with the case where all are newly calculated from the beginning, and the load of the processing for obtaining the cruising range can be reduced.

  Further, when setting the cruising range, the formation range formed based on the nodes having the predicted cruising surplus value equal to or more than a predetermined value (10%) becomes the cruising range. Can be.

  Further, if it is determined in step S21 that the vehicle is not moving (NO), the rate of change determined by only the change in the remaining fuel value, which is the actually measured value, is used as the rate of change in the cruising surplus power. The change rate of the remaining power can be obtained simply and easily, and the processing load can be further reduced.

  If it is determined in step S21 that the vehicle is moving (YES), the first cruising range is set using the estimated cruising surplus value at the current time, and the vehicle is moved. A correction region obtained by correcting the peripheral portion of the cruising range at a past time corresponding to the outside of the range of the predetermined angle with respect to the direction in accordance with the change rate of the cruising surplus force is set as a second cruising range, Since the cruising range information indicating the cruising range and the second cruising range is generated, the second cruising range can be obtained simply and easily, and the processing load can be further reduced.

  The present invention is not limited to the embodiments described above, and various modifications are possible. For example, the numerical values, units, and the like in the above-described embodiment are merely examples, and these can be set as appropriate.

  As described above, the cruising range display device, the cruising range display method, and the program according to the present invention can simplify the processing when obtaining the cruising range as compared with the conventional case, and therefore the vehicle The present invention has the effect of reducing the processing load when calculating the cruising range, and is useful as a cruising range display device, a cruising range display method, and a program for displaying a cruising range of a vehicle.

Reference Signs List 10 processing unit 11 receiving unit 12 storage unit 13 display unit 14 operation unit 100 cruising range display device 200 vehicle information management device

Claims (6)

A cruising range display device that displays a cruising range of the vehicle,
A storage unit that stores prediction information in which a plurality of nodes configuring a road network and a predicted cruising remaining power value at a past time for each of the plurality of nodes are associated with each other,
The prediction information is read from the storage means to obtain a predicted remaining capacity value at the past time, a rate of change of the remaining capacity from the past time to the current time is calculated, and a change in the calculated remaining capacity is calculated. Calculating a predicted remaining capacity value of the node at the current time using the ratio and the predicted remaining capacity value at the past time, and using the calculated predicted remaining capacity value at the current time to calculate the current node. Information processing means for generating range information representing a range at the time of
Display means for displaying the cruising range at the current time based on the cruising range information generated by the information processing means.   The information processing means determines whether or not the vehicle is moving from the past time to the current time, and when it is determined that the vehicle is not moving, the information processing means determines whether the vehicle is moving from the past time. 2. The cruising range display device according to claim 1, wherein a rate of change in the actual remaining fuel amount up to the current time point is a rate of change in the cruising surplus power. 3. The range includes a first range that is within a range of a predetermined angle with respect to the moving direction of the vehicle, and a second range that is outside the range of the predetermined angle,
The information processing means determines whether or not the vehicle is moving from the past time to the current time, and when it is determined that the vehicle is moving, the predicted cruising range at the current time is determined. The first cruising range was set using a surplus value, and the peripheral portion of the cruising range at the past time corresponding to the outside of the predetermined angle range was corrected according to the rate of change of the cruising surplus. The cruising range display according to claim 1 or 2, wherein a correction region is set as the second cruising range, and cruising range information representing the first cruising range and the second cruising range is generated. apparatus.   4. The cruising range display device according to claim 1, wherein the information processing unit sets a formation region formed based on a node whose predicted cruising surplus value is equal to or greater than a predetermined value as the cruising range. 5. A cruising range display method for displaying a cruising range of a vehicle,
Obtain prediction information associated with a plurality of nodes constituting the road network and a predicted cruising capacity value at a past time for each of the plurality of nodes, and obtain a cruising capacity from the past time to the current time. Calculating a rate of change, calculating a predicted remaining capacity value of the node at the present time using the calculated rate of change of the remaining capacity and the predicted remaining capacity value at the past time, and calculating the current An information generating step of generating cruising range information representing a cruising range at the current time using the predicted cruising remaining power value at the time of,
A display step of displaying the cruising range at the current time based on the cruising range information generated in the information generating step. A program that causes a computer to execute processing in a cruising range display device that displays a cruising range of a vehicle,
Obtain prediction information associated with a plurality of nodes constituting the road network and a predicted cruising capacity value at a past time for each of the plurality of nodes, and obtain a cruising capacity from the past time to the current time. A change rate is calculated, and a predicted cruising capacity value at the current time of the node is calculated using the calculated cruising capacity change rate and the predicted cruising capacity value at the past time, and the calculated current An information generating step of generating cruising range information representing a cruising range at the current time using the predicted cruising remaining power value at the time of,
A display control step of causing a display means to display the cruising range at the current time based on the cruising range information generated in the information generating step.

Images