WO2014068685A1

WO2014068685A1 - Display control device, server device, display control method, display control program and recording medium

Info

Publication number: WO2014068685A1
Application number: PCT/JP2012/078076
Authority: WO
Inventors: 田中　誠一
Original assignee: パイオニア株式会社
Priority date: 2012-10-30
Filing date: 2012-10-30
Publication date: 2014-05-08

Abstract

A display control device (100) has a display control section (101) and a reception section (102). The display control section (101) controls the display content of a display section (110) and causes the display section (110) to display a map and the reachable range of a mobile body. The reception section (102) receives designation of a position on the map that is within a prescribed range from the outline of the reachable range. If the reception section (102) received designation of a position on the map that is within a prescribed range from the outline of the reachable range, the display control section (101) causes the display section (110) to display region information corresponding to such position.

Description

Display control device, server device, display control method, display control program, and recording medium

The present invention relates to a display control device, a server device, a display control method, a display control program, and a recording medium.

2. Description of the Related Art Conventionally, a technique is known in which a reachable range estimated to be reachable by energy currently held by a vehicle (for example, energy based on gasoline or electricity) is displayed on a display and the reachable range is guided to a user. . For example, in such a technique, there is a technique in which a mesh with a color is displayed in an area that is a travelable range of the host vehicle on a map (see, for example, Patent Document 1 below).

JP 2011-217509 A

However, in the prior art, there are cases where it is difficult for the user to understand what kind of area is included in the displayed reachable range, and there is a problem that the user's convenience is reduced as an example. .

In order to solve the above-described problem, a display control apparatus according to the invention of claim 1 includes a display control unit that displays a reachable range of a moving object on a map, and a map within a predetermined range from an outline of the reachable range. Receiving means for accepting designation of the upper position, and wherein when the accepting means accepts the designation of the position, the display control means displays area information corresponding to the position. .

According to a fourth aspect of the present invention, there is provided a server apparatus comprising: a current position acquisition unit that acquires a current position of a moving body; an estimation unit that estimates a reachable range of the moving body; A specified position acquisition unit that acquires information on a position within a predetermined range from an outline of the possible range, and region information corresponding to the position acquired by the specified position acquisition unit is extracted, and the region information is stored in the terminal device. Transmitting means for transmitting.

The display control method according to the invention of claim 5 is a display control method performed by a display control device, wherein a first display step of displaying a reachable range of a mobile object on a map, and an outline of the reachable range A reception step of receiving designation of a position on a map within a predetermined range from the line, and a second display step of displaying regional information corresponding to the position when the designation of the position is received in the reception step It is characterized by that.

The display control program according to the invention of claim 6 causes a computer to execute the display control method according to claim 5.

Further, a recording medium according to the invention of claim 7 is characterized in that the display control program according to claim 6 is recorded.

FIG. 1-1 is a block diagram of a functional configuration of the display control apparatus according to the first embodiment of the present invention. FIG. 1-2 is an explanatory diagram illustrating an example of display contents and a specified reception range by the display control apparatus according to the first embodiment. FIG. 2 is a flowchart illustrating an example of processing performed by the display control apparatus according to the first embodiment. FIG. 3 is a block diagram illustrating a hardware configuration of the navigation apparatus according to the present embodiment. FIG. 4A is an explanatory diagram (part 1) schematically illustrating an example of a reachable position search by the navigation device of the present embodiment. FIG. 4B is an explanatory diagram (part 2) schematically illustrating an example of a reachable position search by the navigation device of the present embodiment. FIG. 4-3 is an explanatory diagram (part 3) schematically illustrating an example of a reachable position search by the navigation device of the present embodiment. FIG. 4-4 is an explanatory diagram (part 4) schematically illustrating an example of the reachable position search by the navigation device of the present embodiment. FIG. 5A is an explanatory diagram of an example of a reachable position search by the navigation device of the present embodiment. FIG. 5B is an explanatory diagram of another example of the reachable position search by the navigation device of the present embodiment. FIG. 6 is an explanatory diagram of an example showing the reachable position by longitude-latitude by the navigation device of the present embodiment. FIG. 7 is an explanatory diagram of an example showing the reachable position by the navigation device of the present embodiment as mesh data. FIG. 8 is an explanatory diagram illustrating an example of a closing process performed by the navigation device according to the present embodiment. FIG. 9 is an explanatory diagram schematically showing an example of the closing process by the navigation device of the present embodiment. FIG. 10 is an explanatory diagram illustrating an example of an opening process performed by the navigation device according to the present embodiment. FIG. 11 is an explanatory diagram schematically illustrating an example of vehicle reachable range extraction by the navigation device of the present embodiment. FIG. 12 is an explanatory diagram schematically illustrating an example of mesh data after the reachable range of the vehicle is extracted by the navigation device of the present embodiment. FIG. 13 is an explanatory diagram schematically illustrating another example of vehicle reachable range extraction by the navigation device of the present embodiment. FIG. 14 is a flowchart illustrating an example of processing performed by the navigation device of the present embodiment. FIG. 15A is an explanatory diagram (part 1) of an example of a specific display by the navigation device of the present embodiment. FIG. 15-2 is an explanatory diagram (part 2) of an example of specific display by the navigation device of the present embodiment. FIG. 15C is an explanatory diagram (part 3) of an example of specific display by the navigation device of the present embodiment. FIG. 16 is a block diagram illustrating an example of a functional configuration of the display control system according to the second embodiment of the present invention.

Hereinafter, exemplary embodiments of a display control device, a server device, a display control method, a display control program, and a recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1)
(Functional Configuration of Display Control Device of Embodiment 1)
First, the first embodiment of the present invention will be described. FIG. 1-1 is a block diagram of a functional configuration of the display control apparatus according to the first embodiment of the present invention. The display control apparatus 100 shown in FIG. 1-1 controls the display content of the display unit 110. FIG. 1-1 shows an example in which the display unit 110 is provided outside the display control device 100, but the display unit 110 may be provided integrally with the display control device 100.

The display control device 100 is connected to the display unit 110 by wire or wireless. The display control apparatus 100 controls the display content of the display unit 110 by outputting a display control signal to the display unit 110 via this connection. Further, for example, the display control device 100 and the display unit 110 are used by being mounted on a moving body such as a vehicle. In the following, a moving body on which the display control device 100 and the display unit 110 are mounted is simply referred to as a “moving body”.

As shown in FIG. 1-1, the display control apparatus 100 includes a display control unit 101 and a reception unit 102. The display control unit 101 has a function of displaying the reachable range of the moving object on the map. For example, the display control unit 101 uses the various types of information received from the acquisition unit 103 and the estimation unit 104 provided in the display control device 100 to display a map in a predetermined range centered on the current position of the moving object on the display unit 110. In this map, an image indicating the reachable range is displayed in an area that is the reachable range of the moving object. Here, the reachable range of the mobile body is, for example, a range on the map that can be reached when the mobile body has moved until it has consumed the energy it currently holds.

The energy held by the mobile body includes energy based on electricity, energy based on gasoline, light oil, gas, and the like. Specifically, the energy held by the moving body is energy based on electricity when the moving body is an EV (Electric Vehicle) vehicle. In addition, when the mobile body is an HV (Hybrid Vehicle) vehicle or a PHV (Plug-in Hybrid Vehicle) vehicle, the energy held by the mobile body is energy based on electricity and energy based on gasoline, light oil, gas, etc. .

Furthermore, when the moving body is a fuel cell vehicle, the energy held by the moving body becomes energy based on electricity and fossil fuel that becomes a raw material of hydrogen or hydrogen. For example, the mobile body holds each energy described above by storing electricity in the battery of the mobile body, storing gasoline or light oil in the fuel tank of the mobile body, or storing gas in the high-pressure tank of the mobile body. can do.

The acquisition unit 103 has a function of acquiring various types of information used by the display control unit 101 for display control from the inside or the outside of the display control device 100 and outputting the acquired information to the display control unit 101. For example, information acquired by the acquisition unit 103 can include current position information and map data.

Here, the current position information is information indicating the current position of the moving object. For example, a GPS (Global Positioning System) unit is mounted on the moving body. Since GPS is a well-known technology, detailed description is omitted, but the GPS unit receives the GPS signals (radio waves) from a plurality of GPS satellites to determine the current position of the moving object, and displays the positioning result. The data is output to the acquisition unit 103. Thereby, the acquisition unit 103 can acquire current position information.

For example, map data is data composed of background data representing features (features) such as buildings, rivers, and the ground surface, and road shape data representing road shapes with links and nodes. Also, the map data includes information indicating addresses for each position on the map. Further, the map data may include information used for estimating the reachable range of the mobile object. For example, the information used for estimating the reachable range may include information representing the amount of energy estimated to be consumed when the mobile body moves on each link (hereinafter referred to as “consumed energy consumption amount”). .

The map data is stored in advance in a predetermined storage area of the display control apparatus 100 by the manufacturer of the display control apparatus 100, and the acquisition unit 103 acquires the map data by reading the map data from this storage area. The map data may be stored in a device (external) different from the display control device 100. In this case, the display control device 100 and the device storing the map data are connected by wire or wireless, and the acquisition unit 103 acquires the map data from the device storing the map data via this connection.

The estimation unit 104 has a function of estimating the reachable range of the moving object and outputting information indicating the estimated reachable range of the moving object to the display control unit 101. The estimation unit 104 may estimate the reachable range of the moving object using any estimation method. If an example of the reachable range estimation method by the estimation unit 104 is given, there is an estimation based on the initial stored energy amount and the estimated consumption energy amount that the mobile body holds at the current position.

In this case, the estimation unit 104 acquires the current position information and map data via the acquisition unit 103. In addition, the estimation unit 104 acquires an initial amount of energy held by a mobile body managed by an electronic control unit (ECU) via an in-vehicle communication network that operates according to a communication protocol such as CAN (Controller Area Network).

And the estimation part 104 acquires the consumption estimated energy amount of the link which connects the node corresponding to a present position, and the other node adjacent to this node from map data. Subsequently, the estimation unit 104 acquires the estimated energy consumption of a link connecting the other node and a node adjacent to this node (a node not corresponding to the current position) from the map data. In this way, the estimation unit 104 extends a link from the node corresponding to the current position in a tree shape, and calculates the cumulative value of the estimated energy consumption of this link group.

Then, the estimation unit 104 identifies the previous node where the accumulated value of the estimated consumption energy amount is larger than the initial stored energy amount as the reachable position of the mobile object. In general, a plurality of reachable positions are specified. The estimation unit 104 derives, for example, a Pezier curve or a spline curve from the plurality of specified reachable positions, and sets a range on the map included in the curve as the reachable range. Then, the estimation unit 104 outputs a position coordinate (for example, latitude and longitude) group of each position on the map included in the reachable range to the display control unit 101 as information indicating the reachable range.

The display control unit 101 uses the current position information and map data received from the acquisition unit 103, and information indicating the reachable range received from the estimation unit 104, so that a predetermined range centered on the current position of the moving object (for example, display A map corresponding to the scale of the map to be displayed) is displayed on the display unit 110, and an image indicating the reachable range can be displayed in the area that is the reachable range of the moving object on the map.

Also, the display control unit 101 can display a map using a plurality of scales. For example, the display control unit 101 displays a map using any one of a plurality of scales provided in advance such as a scale of 1 / 10,000, a scale of 1 / 100,000, or a scale of 1 / 1,000,000. Can be made. An actual distance of 100 m is displayed at a display size of 1 cm at a scale of 1/10000, and an actual distance of 10 km is displayed at a display size of 1 cm at a scale of 1/1000.

When displaying a map, the display control unit 101 varies the information displayed on the map according to the scale. That is, for example, an actual distance of 10 km is displayed with a display size of 1 cm at a scale of 1 / 1,000,000. Detailed information about each position on the map is displayed on such a map for wide area display. The information becomes too dense and difficult for the user to see.

Therefore, when displaying a map for wide area display (for example, a map with a scale of 1 / 1,000,000), the display control unit 101 is more simplified than a map for detailed display (for example, a map with a scale of 1 / 10,000). Displayed information. More specifically, for example, when the display control unit 101 displays a map with a scale of 1 / 1,000,000, the display control unit 101 displays only a prefecture name on the map and displays a map with a scale of 1 / 10,000. Displays the prefecture name, city name, road name, and intersection name on the map. Thereby, the display control part 101 can ensure the visibility of a map irrespective of the reduced scale at the time of a display.

As an example, in the first embodiment, when displaying the estimated reachable range, the display control unit 101 has a plurality of scales prepared in advance so that the entire reachable range is within the display screen of the display unit 110. A map of the selected scale is selected and displayed on the display unit 110 (see, for example, FIG. 1-2 described later).

Further, the display control unit 101 may simplify or detail the information to be displayed on the map according to the size of the display screen of the display unit 110 and the screen resolution. For example, in this case, the display control unit 101 acquires information indicating the size and screen resolution of the display screen of the display unit 110 from the display unit 110 via the acquisition unit 103. And the display control part 101 simplifies the information displayed on a map, so that the magnitude | size and screen resolution of the display screen of the display part 110 are small. Thereby, the display control unit 101 can ensure the visibility of the map regardless of the hardware performance of the display unit 110.

The reception unit 102 has a function of outputting information related to the position designated by the user to the display control unit 101. For example, here, the information regarding the position can be information indicating the position coordinates (for example, latitude and longitude) of the position on the map designated by the user. More specifically, when the display screen of the display unit 110 is a touch panel, the reception unit 102 first determines which position on the display screen the user has specified (touched) from the pressure generated on the surface of the touch panel. Is identified. Next, the receiving unit 102 receives information indicating the map displayed on the display unit 110 from the display control unit 101, and specifies the position on the map displayed at the position on the display screen designated by the user. Then, information regarding this position is output to the display control unit 101.

In the above example, the reception unit 102 converts the position on the display screen designated by the user into a position on the map, and outputs information about the position to the display control unit 101. However, the present invention is not limited thereto. Absent. For example, the information indicating the position on the display screen specified by the user is output to the display control unit 101 by the reception unit 102, and the map displayed on the display screen specified by the user on the display screen is displayed on the map. The position may be specified.

In particular, in the first embodiment, the accepting unit 102 accepts designation of a position on a map within a predetermined range from the outline of the reachable range displayed on the display unit 110. Here, the predetermined range from the outline of the reachable range may be a predetermined range determined in advance by the manufacturer of the display control apparatus 100, or may be a range that varies depending on conditions. The details will be described later with reference to FIG. 1-2 and the like. For example, in the first embodiment, the predetermined range from the outline of the reachable range varies according to the scale of the displayed map. In the following, the predetermined range from the outline of the reachable range is referred to as “designated reception range”.

The display control unit 101 causes the display unit 110 to display area information corresponding to the specified position when the reception unit 102 receives the designation of the position on the map within the designated reception range. For example, here, the area information can be information indicating the name of a municipality at a certain position (that is, a part of an address) or information indicating a facility existing in an area to which a certain position belongs. The regional information may be a map centered on a certain position.

Further, the area information corresponding to the designated position may be area information of the designated position, or may be area information of other positions around the designated position. For example, in the first embodiment, the area information corresponding to the designated position is the area information of the position on the outline of the reachable range closest to the designated position. The display control unit 101 extracts region information corresponding to the designated position from the map data, and causes the display unit 110 to display the extracted region information.

Further, when displaying the region information, the display control unit 101 may display the reachable range and the region information in association with each other at the same time. For example, as described above, the display control unit 101 displays the area information of the position on the outline of the latest reachable range at the designated position, and in this case, any position (that is, the position on the outline) It is made to display so that it may be clearly shown to the user whether the local information of is displayed.

(Example of display contents and designated reception range by the display control apparatus of the first embodiment)
Here, an example of display contents and a specified reception range by the display control apparatus 100 will be described. FIG. 1-2 is an explanatory diagram illustrating an example of display contents and a specified reception range by the display control apparatus according to the first embodiment. As shown in FIG. 1-2, the display control apparatus 100 displays a map 120 on the display screen of the display unit 110, and a reachable range (image) 130 is displayed in an area that is a reachable range of the moving object on the map 120. Display.

Specifically, the display control apparatus 100 displays on the display screen of the display unit 110 a scaled map 120 centered on the current position 121 of the moving object and the reachable range 130 within the display screen of the display unit 110. For example, as shown in FIG. 1-2, the horizontal display size (length) of the reachable range 130 is W1, and the vertical display size (length) is H1. Further, the horizontal length of the display screen of the display unit 110 is W2, and the vertical length is H2.

In this case, the display control apparatus 100 displays a map 120 with a scale that satisfies W1 <W2 and H1 <H2 by setting the scale to be smaller as the reachable range of the moving object estimated by the estimation unit 104 is wider. . Thereby, even if the reachable range of an arbitrary width is estimated by the estimation unit 104, the display control apparatus 100 can display the reachable range 130 so as to be within the display screen of the display unit 110. Then, the display control apparatus 100 can show the entire reachable range estimated by the estimation unit 104 to the user on one screen.

For this reason, the display control device 100 can guide the reachable position in this direction on the screen of the display unit 110 regardless of which direction the user proceeds. Therefore, the display control apparatus 100 supports the planning of a movement plan based on the reachable range of the user (for example, whether it is necessary to replenish energy to move to a desired position, or which area should be replenished with energy). It is possible to improve user convenience. This also allows the user to determine the destination after confirming the entire reachable range.

Further, the display control device 100 may display the largest scale map 120 that satisfies W1 <W2 and H1 <H2. For example, as described above, the display control unit 101 can display the map at a plurality of scales such as a scale of 1 / 10,000, a scale of 1 / 100,000, and a scale of 1 / 1,000,000. The display control unit 101 determines whether or not W1 <W2 and H1 <H2 are satisfied when displaying the reachable range estimated by the estimation unit 104 at each scale, and W1 <W2 and H1 <H2 The map with the largest scale among the scales that satisfy the condition is displayed.

The display control unit 101 simplifies information to be displayed on the map as the map scale is smaller from the viewpoint of ensuring the visibility of the map. In other words, the display control apparatus 100 can display more information (detailed information) on the map and guide the information to the user as the scale of the map is larger. For this reason, the display control unit 101 displays the largest scale map satisfying W1 <W2 and H1 <H2, thereby guiding the user to more information while guiding the entire reachable range to the user. As a result, the convenience of the user can be improved.

Note that, for example, the map 120 shown in FIG. 1-2 is a map for wide-area display with a scale of 1 / 1,000,000, and on the map 120, “A prefecture”, “B prefecture”, “C prefecture”, etc. Only the prefecture name is displayed.

Further, the display control device 100 sets a designated reception range for displaying the area information. The display control apparatus 100 sets the designated reception range based on the outline 131 of the reachable range 130. In the example shown in FIG. 1-2, the display control apparatus 100 sets each position on the map included in the area included in the dotted line 141 as the designated reception range.

Here, the dotted line 141 is a line obtained by extending the outline 131 in the direction away from the current position 121 by the length L1 in the display size of the display unit 110. For example, in the case of a map 120 having a scale of 1 / 1,000,000, if L1 is 1 cm, the designated reception range is a position included in an area on the map that is extended by 10 km in each direction away from the current position 121. Become.

On the other hand, for example, in the case of a map with a scale of 1 / 100,000, if L1 is 1 cm, the designated reception range is included in the area on the map extended by 1 km in each direction away from the current position 121 from the reachable range. It becomes a position to be. Thus, the display control apparatus 100 sets the designated reception range according to the scale of the map displayed on the display unit 110. More specifically, the display control apparatus 100 sets a larger number of map positions as the designated reception range when displaying a smaller scale map. Thereby, the display control apparatus 100 can suppress that the designation | designated reception range also becomes narrow with reducing the scale of a map, and user's operativity at the time of designating the position in a designation | designated reception range is improved. It is possible to improve user convenience.

Further, the display control apparatus 100 may set the boundary of the designated reception range not only on the outer side of the outline 131 but also on the inner side as indicated by the dotted line 142. For example, the dotted line 142 is a line obtained by reducing the outline 131 in the direction toward the current position 121 by the length L1 in the display size of the display unit 110. For example, in this case, the designated reception range is a position on the map included in the area between the dotted line 141 and the dotted line 142.

And the display control apparatus 100 displays the area information 150 corresponding to the position 122 on the display part 110, when the position 122 in the designation | designated reception range is designated by the user. For example, at this time, the display control apparatus 100 displays the area information 150 of the position 123 that is the position on the outer outline 131 nearest to the position 122.

In the area information 150 illustrated in FIG. 1-2, the location 123 is a location included in XX city, and therefore indicates the name of a municipality “XX city”. Further, the display control unit 101 issues a “speech balloon” from the position 123 in order to clearly indicate to the user which location information is displayed, and a municipality “XX city” is included in this “speech balloon”. The area information 150 displays the name.

(Example of processing performed by the display control apparatus according to the first embodiment)
Next, an example of processing performed by the display control apparatus 100 will be described. FIG. 2 is a flowchart illustrating an example of processing performed by the display control apparatus according to the first embodiment. For example, when the display control apparatus 100 is instructed by the user to display the reachable range, the display control apparatus 100 performs the process shown in the flowchart of FIG.

As shown in FIG. 2, first, the display control apparatus 100 displays the reachable range on the display screen of the display unit 110 (step S201). Next, the display control apparatus 100 determines whether designation of a position on the map has been received from the user (step S202). If the designation of the position on the map is not received from the user (step S202: No), the display control apparatus 100 stands by until the designation of the position is accepted.

When designation of a position on the map is received from the user (step S202: Yes), the display control device 100 determines that the position on the map designated by the user is within a predetermined range (designated acceptance range) from the outline of the reachable range. It is determined whether it is a position (step S203). For example, when the designated reception range is set, the display control apparatus 100 extracts each position on the map included in the designated reception range, and stores a position coordinate group representing these position coordinates in a predetermined storage area. In step S203, the display control apparatus 100 determines whether the position coordinates of the position on the map designated by the user are the position coordinates included in the position coordinate group. Then, the display control device 100 determines that the position within the designated reception range is designated if the position coordinates on the map designated by the user are the position coordinates included in the position coordinate group.

In step S203, if it is determined that the position on the specified map is within a predetermined range from the outline of the reachable range (step S203: Yes), the display control device 100 displays the area corresponding to the specified position. The information is displayed on the display unit 110 (step S204), and the process shown in the flowchart of FIG.

On the other hand, if the position on the specified map is not within the predetermined range from the outline of the reachable range in step S203 (step S203: No), the display control apparatus 100 performs the processing shown in the flowchart of FIG. finish.

Note that here, the processing is terminated as it is when the position on the map designated by the user is not within the predetermined range from the outline of the reachable range, but the present invention is not limited to this. For example, if the position on the specified map is not within a predetermined range from the outline of the reachable range, the display control apparatus 100 causes the display unit 110 to display a map centered on the position on the specified map. You may do it.

As described above, when the display control device 100 receives designation of a position on the map from the user, if the position is within the designated reception range, the display control device 100 displays the area information corresponding to this position on the display unit 110. Can be made. As a result, the display control apparatus 100 can guide the user in the vicinity of the outline desired by the user (that is, near the reachable position of the moving object), and assists the user in planning the movement plan based on the reachable range. Thus, the convenience for the user can be improved.

Next, examples of the present invention will be described. The embodiment of the present invention described below is an example when the present invention is applied to a navigation device mounted on a vehicle.

(Hardware configuration of navigation device 300)
Next, the hardware configuration of the navigation device 300 will be described. FIG. 3 is a block diagram illustrating a hardware configuration of the navigation apparatus according to the present embodiment. In FIG. 3, a navigation device 300 includes a CPU 301, ROM 302, RAM 303, magnetic disk drive 304, magnetic disk 305, optical disk drive 306, optical disk 307, audio I / F (interface) 308, microphone 309, speaker 310, input device 311, A video I / F 312, a display 313, a camera 314, a communication I / F 315, a GPS unit 316, and various sensors 317 are provided. Each component 301 to 317 is connected by a bus 320.

CPU 301 governs overall control of navigation device 300. The ROM 302 stores programs such as a boot program, an estimated energy consumption calculation program, a reachable position search program, an identification information addition program, and a map data display program. The RAM 303 is used as a work area for the CPU 301. That is, the CPU 301 controls the entire navigation device 300 by executing various programs recorded in the ROM 302 while using the RAM 303 as a work area.

In the estimated energy consumption calculation program, an estimated energy consumption in a link connecting one node and an adjacent node is calculated based on an energy consumption estimation formula for calculating an estimated energy consumption of the vehicle. In the reachable position search program, a plurality of positions (nodes) on the map that can be reached with the remaining energy amount at the current position of the vehicle are searched based on the estimated energy consumption calculated by the estimation program. In the identification information addition program, identification information for identifying whether the vehicle is reachable or unreachable is assigned to a plurality of areas obtained by dividing the map information based on the plurality of reachable positions searched in the search program. The In the map data display program, the reachable range of the vehicle is displayed on the display 313 based on the plurality of areas to which the identification information is given by the identification information giving program.

The magnetic disk drive 304 controls the reading / writing of the data with respect to the magnetic disk 305 according to control of CPU301. The magnetic disk 305 records data written under the control of the magnetic disk drive 304. As the magnetic disk 305, for example, an HD (hard disk) or an FD (flexible disk) can be used.

The optical disk drive 306 controls reading / writing of data with respect to the optical disk 307 according to the control of the CPU 301. The optical disk 307 is a detachable recording medium from which data is read according to the control of the optical disk drive 306. As the optical disc 307, a writable recording medium can be used. In addition to the optical disk 307, an MO, a memory card, or the like can be used as a removable recording medium.

Examples of information recorded on the magnetic disk 305 and the optical disk 307 include map data, vehicle information, road information, travel history, and the like. Map data is used when searching for the reachable position of a vehicle in a car navigation system or when displaying the reachable range of a vehicle. Background data representing features (features) such as buildings, rivers, and the ground surface, This is vector data including road shape data that expresses the shape of the road with links and nodes.

The voice I / F 308 is connected to a microphone 309 for voice input and a speaker 310 for voice output. The sound received by the microphone 309 is A / D converted in the sound I / F 308. For example, the microphone 309 is installed in a dashboard portion of a vehicle, and the number thereof may be one or more. From the speaker 310, a sound obtained by D / A converting a predetermined sound signal in the sound I / F 308 is output.

The input device 311 includes a remote controller, a keyboard, a touch panel, and the like provided with a plurality of keys for inputting characters, numerical values, various instructions, and the like. The input device 311 may be realized by any one form of a remote control, a keyboard, and a touch panel, but can also be realized by a plurality of forms.

The video I / F 312 is connected to the display 313. Specifically, the video I / F 312 is output from, for example, a graphic controller that controls the entire display 313, a buffer memory such as a VRAM (Video RAM) that temporarily records image information that can be displayed immediately, and a graphic controller. And a control IC for controlling the display 313 based on the image data to be processed.

The display 313 displays icons, cursors, menus, windows, or various data such as characters and images. As the display 313, for example, a TFT liquid crystal display, an organic EL display, or the like can be used.

The camera 314 captures images inside or outside the vehicle. The image may be either a still image or a moving image. For example, the outside of the vehicle is photographed by the camera 314, and the photographed image is analyzed by the CPU 301, or a recording medium such as the magnetic disk 305 or the optical disk 307 via the video I / F 312. Or output to

The communication I / F 315 is connected to a network via wireless and functions as an interface between the navigation device 300 and the CPU 301. Communication networks that function as networks include in-vehicle communication networks such as CAN and LIN (Local Interconnect Network), public line networks and mobile phone networks, DSRC (Dedicated Short Range Communication), LAN, and WAN. The communication I / F 315 is, for example, a public line connection module, an ETC (non-stop automatic fee payment system) unit, an FM tuner, a VICS (Vehicle Information and Communication System) / beacon receiver, or the like. VICS is a registered trademark.

The GPS unit 316 receives radio waves from GPS satellites and outputs information indicating the current position of the vehicle. The output information of the GPS unit 316 is used when the CPU 301 calculates the current position of the vehicle together with output values of various sensors 317 described later. The information indicating the current position is information for specifying one point on the map data such as latitude / longitude and altitude.

Various sensors 317 output information for determining the position and behavior of the vehicle, such as a vehicle speed sensor, an acceleration sensor, an angular velocity sensor, and a tilt sensor. The output values of the various sensors 317 are used by the CPU 301 to calculate the current position of the vehicle and the amount of change in speed and direction.

The display control unit 101 and the receiving unit 102 of the display control apparatus 100 shown in FIG. 1-1 use programs and data recorded in the ROM 302, RAM 303, magnetic disk 305, optical disk 307, etc. in the navigation apparatus 300 described above. Thus, the CPU 301 executes a predetermined program and controls each part in the navigation device 300 to realize its function.

(Outline of estimated energy consumption calculation by the navigation device 300)
The navigation device 300 according to the present embodiment calculates the estimated energy consumption of the vehicle on which the device itself is mounted. Specifically, the navigation device 300 is based on, for example, speed, acceleration, and vehicle gradient, and includes at least one of energy consumption estimation formulas including first information, second information, and third information. Is used to calculate the estimated energy consumption of the vehicle in a predetermined section. The predetermined section is a link that connects one node (for example, an intersection) on the road and another node adjacent to the one node.

More specifically, the navigation device 300 determines whether the vehicle is linked based on the traffic jam information provided by the probe, the traffic jam prediction data acquired through the server, the link length or road type stored in the storage device, and the like. The travel time required to finish driving is calculated. Then, navigation device 300 calculates an estimated energy consumption amount per unit time using any one of the following energy consumption estimation formulas (1) to (4), and the vehicle travels on the link during the travel time. Calculate the estimated energy consumption when finishing.

The energy consumption estimation formula shown in the above equation (1) is a theoretical formula for estimating the energy consumption per unit time during acceleration and traveling. Where ε is the net thermal efficiency and η is the total transmission efficiency. Assuming that the sum of the acceleration α of the moving object and the acceleration of gravity g from the road gradient θ is the combined acceleration | α |, the energy consumption estimation formula when the combined acceleration | α | is negative is expressed by the above equation (2). . That is, the energy consumption estimation formula shown in the above equation (2) is a theoretical formula for estimating the energy consumption per unit time during deceleration. Thus, the energy consumption estimation formula per unit time during acceleration / deceleration and travel is expressed by the product of travel resistance, travel distance, net motor efficiency, and transmission efficiency.

In the above formulas (1) and (2), the first term on the right side is the energy consumption (first information) during idling. The second term on the right side is the energy consumption (fourth information) due to the gradient component and the energy consumption (third information) due to the rolling resistance component. The third term on the right side is energy consumption (third information) due to the air resistance component. Further, the fourth term on the right side of the equation (1) is the energy consumption (second information) by the acceleration component. The fourth term on the right side of equation (2) is the energy consumption (second information) due to the deceleration component.

In the above formulas (1) and (2), the motor efficiency and drive efficiency are assumed to be constant. However, in practice, the motor efficiency and the driving efficiency vary due to the influence of the motor speed and torque. Therefore, the following equations (3) and (4) show empirical equations for estimating the energy consumption per unit time.

The empirical formula for calculating the estimated energy consumption when α + g · sin θ | is positive, that is, the empirical formula for calculating the estimated energy consumption per unit time during acceleration and traveling is expressed by the following equation (3). It is. The empirical formula for calculating the estimated energy consumption when the combined acceleration | α + g · sin θ | is negative, that is, the empirical formula for calculating the estimated energy consumption per unit time during deceleration is the following formula (4): It is represented by

In the above formulas (3) and (4), the coefficients a1 and a2 are constants set according to the vehicle situation. The coefficients k1, k2, and k3 are variables based on energy consumption during acceleration. Further, the speed V and the acceleration α are set, and other variables are the same as the above formulas (1) and (2). The first term on the right side corresponds to the first term on the right side of the above equations (1) and (2).

In the above formulas (3) and (4), the second term on the right side is the energy of the gradient resistance component in the second term on the right side and the acceleration in the fourth term on the right side in the formulas (1) and (2). It corresponds to the energy of the resistance component. The third term on the right side corresponds to the energy of the rolling resistance component in the second term on the right side and the energy of the air resistance component in the third term on the right side in the above equations (1) and (2). Β in the second term on the right side of the equation (4) is the amount of potential energy and kinetic energy recovered (hereinafter referred to as “recovery rate”).

Also, as described above, the navigation device 300 calculates the travel time required for the vehicle to travel the link, and calculates the average speed and average acceleration when the vehicle travels the link. Then, the navigation device 300 uses the average speed and average acceleration of the vehicle at the link, and the vehicle travels on the link in the travel time based on the consumption energy estimation formula shown in the following equation (5) or (6). You may calculate the estimated energy consumption at the time of finishing.

The energy consumption estimation formula shown in the above equation (5) is a theoretical formula for calculating the estimated energy consumption at the link when the altitude difference Δh of the link on which the vehicle travels is positive. The case where the altitude difference Δh is positive is a case where the vehicle is traveling uphill. The consumption energy estimation formula shown in the above equation (6) is a theoretical formula for calculating the estimated energy consumption amount in the link when the altitude difference Δh of the link on which the vehicle travels is negative. The case where the altitude difference Δh is negative is a case where the vehicle is traveling downhill. When there is no difference in altitude, it is preferable to use the energy consumption estimation formula shown in the above formula (5).

In the above formulas (5) and (6), the first term on the right side is the energy consumption (first information) during idling. The second term on the right side is the energy consumption (second information) by the acceleration resistance. The third term on the right side is energy consumption consumed as potential energy (fourth information). The fourth term on the right side is the energy consumption (third information) due to the air resistance and rolling resistance (running resistance) received per unit area.

The navigation device 300 may calculate the estimated energy consumption amount of the vehicle with the road gradient θ = 0 in the energy consumption estimation formula shown in the above formulas (1) to (6) when the road gradient is not clear.

Next, the recovery rate β used in the above equations (1) to (6) will be described. In the above equation (5), if the second term on the right side is the energy consumption P _acc of the acceleration component in the link, the energy consumption P _acc of the acceleration component is _calculated from the total energy consumption (left side) of the link from the energy at idling. This is a value obtained by subtracting the consumption (first term on the right side) and the energy consumption (fourth term on the right side) due to running resistance, and is expressed by the following equation (7).

In the above equation (7), it is assumed that the vehicle is not affected by the road gradient θ (θ = 0). That is, the third term on the right side of the above equation (5) is set to zero. Then, by substituting the above equation (7) into the above equation (5), the calculation formula for the recovery rate β shown in the following equation (8) can be obtained.

The recovery rate β is about 0.7 to 0.9 for EV vehicles, about 0.6 to 0.8 for HV vehicles, and about 0.2 to 0.3 for gasoline vehicles. The recovery rate of the gasoline vehicle is a ratio of energy required for acceleration and energy recovered for deceleration.

(Outline of Reachable Position Search in Navigation Device 300)
The navigation device 300 according to the present embodiment searches a plurality of nodes that can be reached from the current position of the vehicle on which the device is mounted as reachable positions of the vehicle. Specifically, the navigation apparatus 300 calculates the estimated energy consumption amount in the link using any one or more of the energy consumption estimation expressions shown in the above expressions (1) to (6). Then, the navigation device 300 searches for a reachable node of the vehicle so as to minimize the cumulative estimated energy consumption in the link and sets it as a reachable position. Below, an example of the reachable position search by the navigation apparatus 300 is demonstrated.

FIGS. 4-1 to 4-4 are explanatory diagrams schematically showing an example of reachable position search by the navigation device of the present embodiment. In FIGS. 4-1 to 4-4, nodes (for example, intersections) of map data are indicated by circles, and links (predetermined sections on the road) connecting adjacent nodes are indicated by line segments (FIGS. 5-1, 5). Similarly, nodes and links are shown for 2).

As shown in FIG. 4A, the navigation device 300 first searches for the link L1_1 closest to the current position 400 of the vehicle. Then, navigation device 300 searches for node N1_1 connected to link L1_1 and adds it to a node candidate for searching for a reachable position (hereinafter simply referred to as “node candidate”).

Next, the navigation apparatus 300 calculates an estimated energy consumption amount in the link L1_1 that connects the current position 400 of the vehicle and the node N1_1 that is a node candidate using the energy consumption estimation formula. Then, the navigation device 300 writes the estimated energy consumption 3wh in the link L1_1 to the storage device (the magnetic disk 305 or the optical disk 307) in association with the node N1_1, for example.

Next, as shown in FIG. 4B, the navigation apparatus 300 searches for all links L2_1, L2_2, and L2_3 connected to the node N1_1 and searches for reachable positions (hereinafter simply referred to as “links”). "Candidate"). Next, the navigation apparatus 300 calculates the estimated energy consumption in the link L2_1 using the consumption energy estimation formula.

The navigation device 300 associates the accumulated energy amount 7wh obtained by accumulating the estimated energy consumption amount 4wh in the link L2_1 and the estimated energy consumption amount 3wh in the link L1_1 with the node N2_1 connected to the link L2_1, and stores the storage device (magnetic disk 305). Or the optical disc 307) (hereinafter referred to as “set cumulative energy amount to node”).

Furthermore, the navigation apparatus 300 calculates the estimated energy consumption in the links L2_2 and L2_3, respectively, using the energy consumption estimation formula as in the case of the link L2_1. Then, the navigation apparatus 300 sets the accumulated energy amount 8wh obtained by accumulating the estimated energy consumption amount 5wh in the link L2_2 and the estimated energy consumption amount 3wh in the link L1_1 to the node N2_2 connected to the link L2_2.

Also, the navigation device 300 sets the accumulated energy amount 6wh obtained by accumulating the estimated energy consumption amount 3wh in the link L2_3 and the estimated energy consumption amount 3wh in the link L1_1 to the node N2_3 connected to the link L2_3. At this time, if the node for which the cumulative energy amount is set is not a node candidate, navigation device 300 adds the node to the node candidate.

Next, as illustrated in FIG. 4C, the navigation device 300 includes all links L3_1 and L3_2_1 connected to the node N2_1, all links L3_2_2, L3_3 and L3_4 connected to the node N2_2, and links connected to the node N2_3. L3_5 is searched for as a link candidate. Next, the navigation apparatus 300 calculates the estimated energy consumption in the links L3_1 to L3_5 using the consumption energy estimation formula.

Then, the navigation apparatus 300 accumulates the estimated energy consumption 4wh in the link L3_1 to the accumulated energy amount 7wh set in the node N2_1, and sets the accumulated energy amount 11wh in the node N3_1 connected to the link L3_1. In addition, the navigation apparatus 300 sets the cumulative energy amounts 13wh, 12wh, and 10wh in the nodes N3_3 to N3_5 connected to the links L3_3 to L3_5, respectively, in the links L3_3 to L3_5 as in the case of the link L3_1.

Specifically, the navigation apparatus 300 accumulates the estimated energy consumption 5wh in the link L3_3 to the accumulated energy amount 8wh set in the node N2_2, and sets the accumulated energy amount 13wh in the node N3_3. The navigation apparatus 300 accumulates the estimated energy consumption 4wh in the link L3_4 to the accumulated energy amount 8wh set in the node N2_2, and sets the accumulated energy amount 12wh in the node N3_4. The navigation device 300 accumulates the estimated energy consumption 4wh in the link L3_5 to the accumulated energy amount 6wh set in the node N2_3, and sets the accumulated energy amount 10wh in the node N3_5.

On the other hand, in the case where a plurality of links L3_2_1 and L3_2_2 are connected to one node like the node N3_2, the navigation device 300 includes a cumulative energy amount in a plurality of routes from the current position 400 of the vehicle to the one node N3_2. , The minimum accumulated energy amount 10wh is set in the one node N3_2.

Specifically, the navigation apparatus 300 accumulates the estimated energy consumption amount 4wh in the link L3_2_1 to the cumulative energy amount 7wh set in the node N2_1 (= total energy amount 11wh), and the estimated energy consumption amount 2wh in the link L3_2_2 is set to the node N2_2. Is accumulated in the accumulated energy amount 8wh set to (= total energy amount 10wh). Then, the navigation apparatus 300 compares the cumulative energy amount 11wh of the route from the current position 400 of the vehicle to the link L3_2_1 with the cumulative energy amount 10wh of the route from the current position 400 of the vehicle to the link L3_2_2 to obtain the minimum cumulative energy. The cumulative energy amount 10wh of the path on the link L3_2_2 side that is the amount is set to the node N3_2.

When there are a plurality of nodes in the same hierarchy from the current position 400 of the vehicle, such as the above-described nodes N2_1 to N2_3, the navigation device 300, for example, from a link connected to a node having a low cumulative energy amount among the nodes at the same level. The estimated energy consumption and the cumulative energy amount are calculated in order. Specifically, the navigation apparatus 300 calculates the estimated energy consumption amount in the link connected to each node in the order of the node N2_3, the node N2_1, and the node N2_2, and accumulates the accumulated energy amount in each node. Thus, by specifying the order of the nodes for calculating the estimated energy consumption amount and the cumulative energy amount, it is possible to efficiently calculate the reachable range with the remaining energy amount.

Thereafter, the navigation apparatus 300 continues to accumulate the accumulated energy amount as described above from the nodes N3_1 to N3_5 to the deeper level nodes. Then, the navigation apparatus 300 extracts all nodes set with a cumulative energy amount equal to or less than a preset designated energy amount as reachable positions of the vehicle, and obtains longitude / latitude information of the nodes extracted as reachable positions. Write to the storage device in association with each node.

Specifically, for example, when the designated energy amount is 10wh, the navigation device 300, as shown by a hatched circle in FIG. 4-4, is the node N1_1, for which the accumulated energy amount of 10wh or less is set. N2_1, N2_2, N2_3, N3_2, and N3_5 are extracted as reachable positions of the vehicle. The designated energy amount set in advance is, for example, the remaining energy amount (initial stored energy amount) at the current position 400 of the vehicle.

The map data 440 composed of the current position 400 of the vehicle and a plurality of nodes and links shown in FIG. 4-4 is an example for explaining the reachable position search, and the navigation device 300 is actually used in FIG. As shown in FIG. 1, more nodes and links are searched in a wider range than the map data 440 shown in FIG. 4-4.

FIG. 5-1 is an explanatory diagram showing an example of reachable position search by the navigation device of the present embodiment. As described above, when calculating the cumulative energy amount for all roads (excluding narrow streets), as shown in Fig. 5-1, search the total energy amount in all nodes on each road in detail. can do. However, the estimated energy consumption of about 2 million links in Japan is calculated and accumulated, and the information processing amount of the navigation device 300 becomes enormous. For this reason, the navigation apparatus 300 may narrow down the road which searches the reachable position of a mobile body based on the importance of a link etc., for example.

FIG. 5-2 is an explanatory diagram showing another example of the reachable position search by the navigation device of the present embodiment. Specifically, for example, the navigation device 300 calculates the cumulative energy amount on all roads (excluding narrow streets) around the current position 400 of the vehicle, and only high-importance roads are within a certain distance away. To calculate the total energy. Accordingly, as shown in FIG. 5B, the number of nodes and the number of links searched by the navigation device 300 can be reduced, and the information processing amount of the navigation device 300 can be reduced. Therefore, the processing speed of the navigation device 300 can be improved.

(Outline of map data division in navigation device 300)
The navigation device 300 according to the present embodiment divides the map data stored in the storage device based on the reachable position searched as described above. Specifically, the navigation device 300 converts map data composed of vector data into, for example, 64 × 64 dot mesh data (X, Y), and converts the map data into raster data (image data).

FIG. 6 is an explanatory diagram illustrating an example of the reachable position by the navigation device of the present embodiment in terms of longitude-latitude. Moreover, FIG. 7 is explanatory drawing of an example which shows the reachable position by the navigation apparatus of a present Example by mesh data. In FIG. 6, for example, longitude and latitude information (x, y) of reachable positions searched as shown in FIGS. 5-1 and 5-2 are illustrated in absolute coordinates. FIG. 7 illustrates screen data of 64 × 64 dot mesh data (X, Y) to which identification information is assigned based on the reachable position.

As shown in FIG. 6, the navigation apparatus 300 first generates longitude / latitude information (x, y) having a point group 600 in absolute coordinates based on the longitude x and latitude y of each of a plurality of reachable positions. . The origin (0, 0) of the longitude / latitude information (x, y) is at the lower left of FIG. Then, the navigation device 300 calculates distances w1 and w2 from the longitude ofx of the current position 400 of the vehicle to the maximum longitude x_max and the minimum longitude x_min of the reachable position furthest away in the longitude x direction. Further, the navigation device 300 calculates distances w3 and w4 from the latitude of the current position 400 of the vehicle to the maximum latitude y_max and the minimum latitude y_min of the reachable position farthest in the latitude y direction.

Next, the navigation device 300 has a distance w2 (hereinafter referred to as w5 = max (w1, w2) from the current position 400 of the vehicle to the minimum longitude x_min, which is the longest distance among the distances w1 to w4 from the current position 400 of the vehicle. , W3, w4)) and map data including a plurality of reachable positions so that the length of 1 / n becomes the length of one side of a rectangular element of mesh data (X, Y). For example, it is converted into mesh data (X, Y) of m × m dots (for example, 64 × 64 dots).

Specifically, the navigation apparatus 300 sets the ratio of 1 mesh and the size of longitude and latitude as the magnification mag = w5 / n, and the longitude / latitude information (x, y) and mesh data (X, Y) are the following ( The longitude / latitude information (x, y) is converted into mesh data (X, Y) so as to satisfy the expressions (9) and (10).

X = (x-ofx) / mag (9)

Y = (y-ofy) / mag (10)

By converting the longitude / latitude information (x, y) into mesh data (X, Y), as shown in FIG. 7, the current position 400 of the vehicle is composed of mesh data (X, Y) of m × m dots. The mesh data (X, Y) at the current position 400 of the vehicle at the center of the rectangular image data is equal in both the X-axis direction and the Y-axis direction, and X = Y = m / 2 = n + 4. Further, n = (m / 2) −4 is set in order to make, for example, 4 dots around the mesh data (X, Y) blank. Then, when the navigation device 300 converts the longitude / latitude information (x, y) into mesh data (X, Y), it gives identification information to each area of the mesh data (X, Y), and m rows m It is converted into mesh data of two-dimensional matrix data (Y, X) of columns.

Specifically, when the reachable position of the vehicle is included in one area of the mesh data (X, Y), the navigation device 300 can be used to identify that the vehicle can reach the one area. For example, “1” is given as the identification information (in FIG. 7, one dot is drawn in black, for example). On the other hand, when the reachable position of the vehicle is not included in one area of the mesh data (X, Y), the navigation device 300 cannot reach that one vehicle cannot reach the one area. For example, “0” is given as the identification information (in FIG. 7, one dot is drawn in white, for example).

As described above, the navigation device 300 converts the map data into binarized map data of m rows and m columns of two-dimensional matrix data (Y, X) obtained by adding identification information to each area obtained by dividing the map data. Treated as raster data. Each area of the mesh data is represented by a rectangular area within a certain range. Specifically, as shown in FIG. 7, for example, m × m dot mesh data (X, Y) in which a plurality of reachable position point groups 700 are drawn in black is generated. The origin (0, 0) of the mesh data (X, Y) is at the upper left.

(Outline of identification information assignment in the navigation device 300, part 1)
The navigation apparatus 300 according to the present embodiment changes the identification information given to each area of the m × m dot mesh data (X, Y) divided as described above. Specifically, the navigation apparatus 300 performs a closing process (a process for performing a reduction process after the expansion process) on mesh data of two-dimensional matrix data (Y, X) of m rows and m columns.

FIG. 8 is an explanatory diagram showing an example of the closing process by the navigation device of the present embodiment. FIGS. 8A to 8C are mesh data of two-dimensional matrix data (Y, X) of m rows and m columns in which identification information is assigned to each region. FIG. 8A shows mesh data 800 to which identification information is given for the first time after map data division processing. That is, the mesh data 800 shown in FIG. 8A is the same as the mesh data shown in FIG.

8B shows mesh data 810 after the closing process (expansion) is performed on the mesh data 800 shown in FIG. 8A. FIG. 8C shows mesh data 820 after the closing process (reduction) is performed on the mesh data 810 shown in FIG. 8B. In the

mesh data

800, 810, and 820 shown in FIGS. 8A to 8C, the vehicle reachable ranges 801, 811 and 821 generated by a plurality of regions to which reachable identification information is assigned are blackened. Shown in a filled state.

As shown in FIG. 8A, in the mesh data 800 after the identification information is given, a missing point 802 (in the reachable range 801 that is hatched) that is an unreachable area included in the reachable range 801 of the vehicle. White background). For example, as shown in FIG. 5B, the missing point 802 is a node that becomes a reachable position when narrowing down roads for searching for nodes and links in order to reduce the load of the reachable position search processing by the navigation device 300. This occurs when the number is reduced.

Next, as shown in FIG. 8B, the navigation device 300 performs a closing expansion process on the mesh data 800 after the identification information is added. In the closing expansion process, the identification information of one area adjacent to the area to which the reachable identification information is added in the mesh data 800 after the identification information is added is changed to the reachable identification information. As a result, the missing point 802 generated in the reachable range 801 of the vehicle before the expansion process (after the identification information is given) disappears.

Also, the identification information of all the areas adjacent to the outermost area of the reachable range 801 of the vehicle before the expansion process is changed to the reachable identification information. For this reason, the outer periphery of the reachable range 811 of the vehicle after the expansion process is one dot at a time so as to surround the outer periphery of each outermost region of the reachable range 801 of the vehicle before the expansion process every time the expansion process is performed. spread.

Thereafter, as shown in FIG. 8C, the navigation apparatus 300 performs closing reduction processing on the mesh data 810. In the closing reduction process, the identification information of one area adjacent to the area to which the unreachable identification information is assigned in the mesh data 810 after the expansion process is changed to the unreachable identification information.

For this reason, each area on the outermost periphery of the reachable range 811 of the vehicle after the expansion process becomes an area that cannot be reached by one dot every time the reduction process is performed, and the reachable range 811 of the vehicle after the expansion process is reached. The outer circumference shrinks. Thereby, the outer periphery of the reachable range 821 of the vehicle after the reduction process is substantially the same as the outer periphery of the reachable range 801 of the vehicle before the expansion process.

Navigation device 300 performs the above-described expansion process and reduction process the same number of times. Specifically, when the expansion process is performed twice, the subsequent reduction process is also performed twice. By equalizing the number of times of the expansion process and the reduction process, the identification information of almost all areas in the outer periphery of the reachable range of the vehicle that has been changed to the identification information that can be reached by the expansion process is restored to the original information by the reduction process. It can be changed to unreachable identification information. In this way, the navigation device 300 can remove the missing point 802 in the reachable range of the vehicle and generate the reachable range 821 of the vehicle that can clearly display the outer periphery.

More specifically, the navigation device 300 performs the closing process as follows. FIG. 9 is an explanatory diagram schematically showing an example of the closing process by the navigation device of the present embodiment. FIG. 9A to FIG. 9C show mesh data of two-dimensional matrix data (Y, X) of h rows and h columns in which identification information is assigned to each region as an example.

FIG. 9A shows the mesh data 900 after the identification information is given. FIG. 9B shows mesh data 910 after closing processing (expansion) with respect to FIG. FIG. 9C shows mesh data 920 after closing processing (reduction) with respect to FIG. In

mesh data

900, 910, and 920 of FIGS. 9A to 9C,

areas

901 and 902 to which reachable identification information is assigned are illustrated by different hatchings.

As shown in FIG. 9A, identification information that can reach the region 901 in the c-row, f-column, f-row, c-column, and g-row, f column is assigned to the mesh data 900 after the identification information is given. In FIG. 9A, the regions 901 to which reachable identification information is assigned are arranged apart from each other so that the change in the identification information after the expansion process and the reduction process becomes clear.

The navigation apparatus 300 performs a closing expansion process on the mesh data 900 having been given such identification information. Specifically, as illustrated in FIG. 9B, the navigation device 300 includes eight regions adjacent to the lower left, lower, lower right, right, upper right, upper, upper left, and left of the region 901 in the c row and the f column. (B row e column to b row g column, c row e column, c row g column and d row e column to d row g column) 902 identification information is changed from unreachable identification information to reachable identification information change.

Further, the navigation device 300 can reach the identification information of the eight adjacent regions 902 in the region 901 of the f row c column and the g row f column similarly to the processing performed for the region 901 of the c row f column. Change to the identification information. For this reason, the reachable range 911 of the vehicle is wider than the reachable range of the vehicle in the mesh data 900 after adding the identification information by the amount that the identification information of the area 902 is changed to the reachable identification information.

Next, the navigation apparatus 300 performs a closing reduction process on the mesh data 910 after the expansion process. Specifically, as illustrated in FIG. 9C, the navigation device 300 has b rows and e columns adjacent to an area to which unreachable identification information is given (the white background portion of the mesh data 910 after the expansion process). The identification information of the eight areas 902 of the b row g column, the c row e column, the c row g column, and the d row e column to the d row g column is changed to unreachable identification information.

In addition, the navigation device 300 is similar to the processing performed on the eight areas 902 of b row e column to b row g column, c row e column, c row g column, and d row e column to d row g column. E row b column to e row d column, f row b column, f row d column to f row g column, g row b column to g row e column adjacent to the region to which the unreachable identification information is given. , G row g column, h row e column and h row g column 15 902 identification information is changed to unreachable identification information.

As a result, as shown in FIG. 9C, the mesh data 920 after the reduction process is reduced to the three regions 901 to which reachable identification information is added, similarly to the mesh data 900 after the identification information is added. A reachable range 921 of the vehicle composed of one region 902 that remains in the state where the reachable identification information is provided even after the processing is generated. As described above, the region 902 that is provided with the identification information that can be reached during the expansion process and that has been provided with the identification information that can be reached after the reduction process is within the reachable range of the mesh data 900 after the identification information is applied. The missing point that has occurred disappears.

(Outline of identification information addition in the navigation device 300, part 2)
The navigation device 300 performs an opening process (a process of performing an expansion process after the reduction process) on the mesh data of the two-dimensional matrix data (Y, X), and generates a vehicle reachable range in which the outer periphery can be clearly displayed. May be. Specifically, the navigation apparatus 300 performs an opening process as follows.

FIG. 10 is an explanatory diagram showing an example of the opening process by the navigation device of the present embodiment. FIGS. 10A to 10C are mesh data of two-dimensional matrix data (Y, X) of m rows and m columns in which identification information is assigned to each region. FIG. 10A shows mesh data 1000 after identification information is given. FIG. 10B shows mesh data 1010 after the opening process (reduction) with respect to FIG. FIG. 10C shows mesh data 1020 after the opening process (expansion) with respect to FIG. In the

mesh data

1000, 1010, and 1020 shown in FIGS. 10A to 10C, the vehicle reachable ranges 1001, 1011 and 1021 generated by a plurality of regions to which reachable identification information is assigned are blackened. Shown in a filled state.

As shown in FIG. 10A, when many isolated points 1002 are generated on the outer periphery of the reachable range 1001 of the vehicle in the mesh data 1000 after the identification information is added, the mesh data 1000 after the identification information is added is opened. By performing the process, the isolated point 1002 can be removed. Specifically, as shown in FIG. 10B, the navigation device 300 performs an opening reduction process on the mesh data 1000 after the identification information is given.

In the reduction process of the opening, the identification information of one area adjacent to the area to which the unreachable identification information is added in the mesh data 1000 after the identification information is added is changed to the unreachable identification information. As a result, the isolated point 1002 generated in the reachable range 1001 of the vehicle before the reduction process (after the identification information is given) is removed.

For this reason, each area on the outermost periphery of the reachable range 1001 of the vehicle after the identification information is added becomes an area that cannot be reached by one dot every time the reduction process is performed, and the reachable range of the vehicle after the identification information is given The outer periphery of 1001 shrinks. Further, the isolated point 1002 generated in the reachable range 1001 of the vehicle after the identification information is given is removed.

Thereafter, as shown in FIG. 10C, the navigation device 300 performs an opening expansion process on the mesh data 1010. In the opening expansion process, the identification information of one area adjacent to the area to which the unreachable identification information is added in the mesh data 1010 after the reduction process is changed to the reachable identification information. For this reason, the outer periphery of the reachable range 1021 of the vehicle after the expansion process is one dot at a time so as to surround the outer periphery of each outermost region of the reachable range 1011 of the vehicle after the reduction process every time the expansion process is performed. spread.

The navigation apparatus 300 performs the expansion process and the reduction process the same number of times in the opening process as in the closing process. Thus, by equalizing the number of times of the expansion process and the reduction process, the outer periphery of the reachable range 1011 of the vehicle shrunk by the reduction process is expanded, and the outer periphery of the vehicle reachable range 1021 after the reduction process is expanded before the reduction process. Can be returned to the outer periphery of the reachable range 1001 of the vehicle. In this way, the navigation apparatus 300 can generate the vehicle reachable range 1021 in which the isolated point 1002 does not occur and the outer periphery can be clearly displayed.

(Outline of outline extraction of reachable range in navigation device 300, part 1)
The navigation device 300 according to the present embodiment extracts outlines of the reachable range of the vehicle based on identification information given to mesh data of two-dimensional matrix data (Y, X) of m rows and m columns. Specifically, the navigation apparatus 300 extracts the outline of the reachable range of the vehicle using, for example, a Freeman chain code. More specifically, the navigation apparatus 300 extracts the outline of the reachable range of the vehicle as follows.

FIG. 11 is an explanatory diagram schematically illustrating an example of vehicle reachable range extraction by the navigation device of the present embodiment. Moreover, FIG. 12 is explanatory drawing which shows typically an example of the mesh data after the vehicle reachable range extraction by the navigation apparatus of a present Example.

FIG. 11A shows numbers indicating the adjacent directions of the regions 1110 to 1117 adjacent to the region 1100 (hereinafter referred to as “direction index (chain code)”) and eight-direction arrows corresponding to the direction index. . FIG. 11B shows mesh data 1120 of two-dimensional matrix data (Y, X) of h rows and h columns as an example. In FIG. 11B, the areas 1121 to 1134 to which reachable identification information is assigned and the areas to which reachable identification information is enclosed surrounded by the areas 1121 to 1134 are illustrated by hatching.

The direction index indicates the direction in which the line segment of the unit length is facing. In the mesh data (X, Y), the coordinates corresponding to the direction index are (X + dx, Y + dy). Specifically, as shown in FIG. 11A, the direction index in the direction from the region 1100 toward the region 1110 adjacent to the lower left is “0”. The direction index in the direction from the region 1100 to the adjacent region 1111 is “1”. The direction index in the direction from the region 1100 toward the region 1112 adjacent to the lower right is “2”.

Also, the direction index in the direction from the region 1100 toward the region 1113 adjacent to the right is “3”. The direction index in the direction from the region 1100 toward the region 1114 adjacent to the upper right is “4”. The direction index in the direction from the region 1100 toward the adjacent region 1115 is “5”. The direction index in the direction from the region 1100 toward the region 1116 adjacent to the upper left is “6”. The direction index in the direction from the region 1100 toward the region 1117 adjacent to the left is “7”.

The navigation device 300 searches the region 1100 adjacent to the region 1100 and provided with the reachable identification information “1” counterclockwise. In addition, the navigation device 300 determines the search start point of the area to which the reachable identification information adjacent to the area 1100 is assigned based on the previous direction index. Specifically, when the direction index from another area toward area 1100 is “0”, navigation apparatus 300 has an area adjacent to the left of area 1100, that is, an area adjacent in the direction of direction index “7”. The search starts from 1117.

Similarly, when the direction index from another region toward the region 1100 is “1” to “7”, the navigation device 300 is adjacent to the lower left, lower, lower right, right, upper right, upper, upper left of the region 1100. The search is started from the matching regions, that is, the regions 1110 to 1116 adjacent in the directions of the direction indices “0”, “1”, “2”, “3”, “4”, “5”, “6”, respectively. When the navigation apparatus 300 detects the reachable identification information “1” from any one of the areas 1110 to 1117 from the area 1100, the areas 1110 to 1117 in which the reachable identification information “1” is detected. The direction indices “0” to “7” corresponding to are written in the storage device in association with the area 1100.

Specifically, the navigation device 300 extracts the outline of the reachable range of the vehicle as follows. As shown in FIG. 11 (B), the navigation apparatus 300 first identifies identification that can be reached in units of rows from the region of the a row and the a column of the mesh data 1120 of the two-dimensional matrix data (Y, X) of the h row and the h column. Search for an area to which information is assigned.

Since unreachable identification information is given to all the regions in the a-th row of the mesh data 1120, the navigation device 300 next moves from the region in the b-th row to the b-th column in the mesh data 1120. Search for identification information that can be reached toward the area. Then, after detecting the reachable identification information in the area 1121 in the b row and e column of the mesh data 1120, the navigation apparatus 300 moves counterclockwise from the area 1121 in the b row and e column of the mesh data 1120, and reaches the reachable range of the vehicle. A region having reachable identification information that becomes an outline of the line is searched.

Specifically, the navigation device 300 has already searched for the region of b rows and d columns adjacent to the left of the region 1121, and therefore, first, identification is made counterclockwise from the region 1122 adjacent to the lower left of the region 1121. Search whether there is an area having information. Then, the navigation apparatus 300 detects the reachable identification information of the area 1122 and stores the direction index “0” in the direction from the area 1121 to the area 1122 in the storage device in association with the area 1121.

Next, since the navigation device 300 has the previous direction index “0”, whether or not there is a region having reachable identification information counterclockwise from the region of c rows and c columns adjacent to the left of the region 1122. Search for. The navigation apparatus 300 detects the reachable identification information of the area 1123 adjacent to the lower left of the area 1122 and stores the direction index “0” in the direction from the area 1122 to the area 1123 in association with the previous direction index. Store in the device.

Thereafter, the navigation device 300 determines a search start point based on the previous direction index, and uses the direction index as a process for searching whether there is an area having identification information that can be reached counterclockwise from the search start point. The process is repeated until the corresponding arrow returns to the area 1121. Specifically, navigation device 300 searches whether there is an area having identification information that can be reached counterclockwise from an area adjacent to the left of area 1122, and searches for adjacent area 1124 below area 1123. The reachable identification information is detected, and the direction index “1” is stored in the storage device in association with the previous direction index.

Similarly, after determining the search start point based on the previous direction index, the navigation device 300 searches for an area having identification information that can be reached counterclockwise from the search start point, and an area having reachable identification information 1124 to 1134 are sequentially detected. Then, every time the navigation device 300 acquires the direction index, the navigation device 300 associates it with the previous direction index and stores it in the storage device.

Thereafter, navigation device 300 searches counterclockwise from the region of row b and column f adjacent to the upper right of region 1134 to determine whether there is a region having reachable identification information, and adjacent to region 1134. The reachable identification information 1121 is detected, and the direction index “5” is stored in the storage device in association with the previous direction index. As a result, the direction index “0” → “0” → “1” → “0” → “2” → “3” → “4” → “3” → “2” → “5” → “5” → “6” → “6” → “5” is stored in this order.

As described above, the navigation device 300 sequentially searches the areas 1122 to 1134 having the reachable identification information adjacent to the area 1121 in the counterclockwise direction from the first detected area 1121 to acquire the direction index. Then, the navigation device 300 fills one area in the direction corresponding to the direction index from the area 1121, thereby, as shown in FIG. 12, the part surrounded by the outline 1201 of the reachable range of the vehicle and the outline 1201 Mesh data having a vehicle reachable range of 1202 is generated.

(Outline of outline extraction of reachable range in navigation device 300, part 2)
Another example of vehicle reachable range extraction by the navigation device 300 will be described. For example, the navigation device 300 may extract the outline of the reachable range of the vehicle based on the longitude and latitude information of the mesh data of the two-dimensional matrix data (Y, X) to which reachable identification information is assigned. . Specifically, the navigation apparatus 300 extracts the outline of the reachable range of the vehicle as follows.

FIG. 13 is an explanatory diagram schematically showing another example of vehicle reachable range extraction by the navigation device of the present embodiment. The mesh data 1300 of the two-dimensional matrix data (Y, X) of d rows and h columns as shown in FIG. 13 will be described as an example. The navigation device 300 searches the mesh data 1300 for the region to which the reachable identification information “1” is assigned. Specifically, the navigation apparatus 300 first searches for identification information “1” that can be reached from the area of the a row and the a column to the area of the a row and the h column.

Since unreachable identification information “0” is assigned to all the regions in the a-th row of the mesh data 1300, the navigation device 300 next moves the region from the b-th row to the b-th column. A region having identification information “1” that can be reached is searched. Then, the navigation apparatus 300 acquires the minimum longitude px1 and the minimum latitude py1 (upper left coordinates of the area 1301) of the area 1301 in the b row and c column having the reachable identification information “1”.

Next, the navigation device 300 searches for an area having identification information “1” that can be reached from the area of b rows and d columns toward the area of b rows and h columns. Then, the navigation device 300 searches for a boundary between the area having the reachable identification information “1” and the area having the unreachable identification information “0”, and b having the reachable identification information “1”. The maximum longitude px2 and the maximum latitude py2 (lower right coordinates of the region 1302) of the region 1302 in the row f column are acquired.

Next, the navigation device 300 has a rectangular area whose apexes are the upper left coordinates (px1, py1) of the area 1301 of b rows and c columns and the lower right coordinates (px2, py2) of the area 1302 of b rows and f columns. Fill.

Next, the navigation device 300 searches the mesh data 1300 for the identification information “1” that can be reached from the b row g column to the b row h column area and further from the c row a column to the c row h column. The navigation apparatus 300 acquires the minimum longitude px3 and the minimum latitude py3 (upper left coordinates of the area 1303) of the area 1303 in the c row and d column having the reachable identification information “1”.

Next, the navigation apparatus 300 searches for an area having identification information “1” that can be reached from the area of the c row and the e column toward the area of the c row and the h column. Then, the navigation apparatus 300 searches the boundary between the area having the reachable identification information “1” and the area having the unreachable identification information “0”, and has the reachable identification information “1”. The maximum longitude px4 and the maximum latitude py4 (lower right coordinates of the region 1304) of the region 1304 in the row f column are acquired.

Next, the navigation device 300 has a rectangular area whose apexes are the upper left coordinates (px3, py3) of the area 1303 of c row and d column and the lower right coordinates (px4, py4) of the area 1304 of c row and f column. Fill.

After that, the navigation device 300 searches for an area having identification information “1” that can be reached from the area of the c row and the g column to the area of the c row and the h column and further from the d row and the a column to the d row and the h column. The navigation device 300 ends the process because the unreachable identification information “0” is assigned to all the areas from the c row and g column areas to the d row and h column.

In this way, by filling the area having the reachable identification information “1” for each row of the mesh data 1300 of the two-dimensional matrix data (Y, X), the reachable range of the vehicle and the reachable range of the vehicle are set. An outline can be acquired.

When the navigation device 300 acquires the outline of the reachable range, the navigation apparatus 300 identifies the position on the map that overlaps the outline based on the outline and map data. For example, when the outline line is superimposed on the map, the navigation apparatus 300 acquires the latitude / longitude information of each position on the map located along the outline and stores the latitude / longitude information group in the storage device.

(Example of processing performed by navigation device)
Next, an example of processing performed by the navigation device 300 will be described. FIG. 14 is a flowchart illustrating an example of processing performed by the navigation device of the present embodiment. For example, the navigation apparatus 300 performs the process shown in the flowchart of FIG. 14 when the user operates the input device 311 and is instructed to display the reachable range.

As shown in FIG. 14, the navigation device 300 first acquires the current position (ofx, ofy) of the vehicle on which the device is mounted by the GPS unit 316 or the communication I / F 315 (step S1401). Next, the navigation apparatus 300 acquires the initial stored energy amount of the vehicle at the current position (ofx, ofy) of the vehicle through the communication I / F 315 or the like (step S1402).

Next, the navigation device 300 performs a reachable node search process (step S1403). The outline of the reachable node search process is as described with reference to FIGS. 4-1 to 4-4, FIGS. 5-1 and 5-2. Next, the navigation apparatus 300 performs mesh data generation and identification information addition processing (step S1404). The outline of the mesh data generation and identification information addition processing is as described with reference to FIGS.

Next, the navigation device 300 extracts the outline of the reachable range of the vehicle (step S1405). The outline of the outline extraction of the reachable range is as described with reference to FIGS. When the outline of the reachable range is extracted, the navigation apparatus 300 acquires the latitude / longitude information of each position on the map located along the outline when the outline is superimposed on the map, and this latitude / longitude information The group is stored in the storage device.

Next, the navigation device 300 sets the scale of the map when displaying the reachable range (step S1406). In step S <b> 1406, the navigation apparatus 300 sets the entire reachable range among the scales that can be displayed to the largest scale that can be displayed on the display screen of the display 313. For example, the navigation device 300 can display the map at a plurality of scales such as a scale of 1/10000, a scale of 1/10000, and a scale of 1 / 1,000,000. The navigation device 300 determines whether the reachable range fits within the display screen of the display 313 when the reachable range estimated at the respective scales is displayed, and the scale of the scale determined to fit within the display screen. Set to the largest scale in our house.

Next, the navigation device 300 sets a designated reception range for displaying regional information based on the outline extracted in step S1405 (step S1407). The setting of the designated reception range performed by the navigation device 300 in step S1407 will be described later with reference to FIGS. 15-1 to 15-3. When the designated reception range is set, the navigation device 300 extracts each position on the map included in the set designated reception range, and stores a longitude / latitude information group representing the position on the map in the storage device.

Next, the navigation apparatus 300 displays the reachable range on the display 313 (step S1408), and determines whether the designation of the position on the map displayed from the user by the input device 311 or the like has been received (step S1409). In step S1409, the navigation device 300 determines whether the latitude / longitude of the position on the map designated by the user is the longitude / latitude included in the longitude / latitude information group stored in step S1407. Then, the navigation device 300 determines that the position within the designated reception range has been designated if the latitude and longitude included in the longitude / latitude information group. If the navigation apparatus 300 has not received the designation of the position on the map from the user (step S1409: No), it waits until the designation of the position is accepted.

If the position designation is received from the user (step S1409: YES), the navigation apparatus 300 determines whether the position designated by the user is a position within the designated reception range (step S1410). If it is a position within the designated reception range (step S1410: Yes), the navigation apparatus 300 displays area information corresponding to this position on the display 313 (step S1411), and the process returns to step S1409.

On the other hand, if the position specified by the user is not within the specified reception range (step S1410: No), the navigation apparatus 300 displays a map centered on the position specified by the user on the display 313 (step S1412). ), The process shown in the flowchart of FIG.

(Example of specific display by the navigation device of this embodiment)
Next, an example of specific display by the navigation device 300 will be described. FIG. 15A is an explanatory diagram (part 1) of an example of a specific display by the navigation device of the present embodiment. As illustrated in FIG. 15A, the navigation apparatus 300 displays a map 1510 and a reachable range 1520 on the display 313.

Here, the map 1510 is a map on a scale that is centered on the current position 1511 of the host vehicle on which the navigation device 300 is mounted and that the reachable range 1520 fits within the display screen of the display 313. The navigation apparatus 300 displays a host vehicle icon 1511a indicating the current position of the host vehicle on the current position 1511 in the map 1510.

The map 1510 is a map for wide area display (for example, a map with a scale of 1 / 1,000,000) based on the reachable range estimated by the navigation device 300. For this reason, the navigation device 300 includes a prefecture name (for example, “Tokyo”, “Kanagawa”, “Saitama”, “Chiba”) and main place names (for example, “Tokyo Bay”, “Sagami”) on the map 1510. Bay ”) is displayed, and the name of the municipality is not displayed. For example, as shown in FIG. 1-2, the boundaries of each prefecture are also displayed in the map for wide area display. In this embodiment, these boundaries are shown in FIG. Not shown.

Then, the navigation apparatus 300 displays a designated reception range 1530 for displaying regional information based on the outline of the reachable range 1520 (the portion of the reachable range 1520 that is darkly colored) 1521 and the scale of the map 1510. Is set. Here, the designated reception range 1530 is a range expanded in each direction away from the current position 1511 than the reachable range 1520 in the map 1510.

Specifically, in the example shown in FIG. 15A, the range included in the dotted line 1531 is the designated acceptance range 1530, and the designated acceptance range 1530 displays the reachable range 1520 in each direction away from the current position 1511. This is a range expanded by the length L2 with a display size of 313. Here, L2 is predetermined by the manufacturer of the navigation device 300 or the like. As described in the first embodiment, for example, when the scale of the map 1510 is 1 / 1,000,000, and L2 is 1 cm, the designated reception range 1530 moves the reachable range 1520 in each direction away from the current position 1511. The position is included in the area on the map expanded by 10 km. On the other hand, for example, if the scale of the map 1510 is 1 / 100,000 and L2 is 1 cm, the designated reception range 1530 is an area on the map that is extended by 1 km from the reachable range 1520 in each direction away from the current position 1511. It will be included.

FIG. 15-2 is an explanatory diagram (part 2) illustrating an example of a specific display by the navigation device of the present embodiment. The navigation device 300 displays the display screen shown in FIG. 15-2 on the display 313 when the user specifies the position within the specified reception range 1530 while the display screen shown in FIG. To display.

In the example shown in FIG. 15B, the position 1512 within the designated reception range 1530 is designated by the user. For this reason, the navigation apparatus 300 displays the area information 1540 corresponding to the position 1512 on the display 313. Specifically, here, the area information 1540 is area information of a position 1513 on the outline 1531 that is closest to the position 1512 designated by the user.

More specifically, the navigation device 300 displays a map 1541 centered on the position 1513 as the regional information 1540. Here, the map 1541 is a map for detailed display than the map 1510, and its scale is larger than that of the map 1510. Thereby, the navigation apparatus 300 can guide a map 1541 including more detailed information than the map 1510 around the position 1513 to the user.

Further, the navigation device 300 displays the name of the municipality to which the position 1513 belongs and the distance from the current position 1511 to the position 1513 above the map 1541. Thereby, the navigation apparatus 300 can guide the user of the outline of what the position 1513 is.

Furthermore, the navigation device 300 displays driving support information 1542 as the area information 1540. The driving support information 1542 is information that supports a user's driving based on the characteristics around the position 1513. More specifically, in the example shown in FIG. 15B, the navigation apparatus 300 displays a message such as “There is no power supply facility around the specified position” as the driving support information 1542. The driving support information 1542 is not limited to the above example, and may be arbitrary information that supports the driving of the user based on the characteristics around the position 1513. Thereby, the navigation apparatus 300 can assist the driving | operation around the position 1513 of a user based on the characteristic around the position 1513.

Further, the navigation device 300 displays spot information 1543 as the area information 1540. The spot information 1543 is information representing facilities existing around the position 1513. For example, in the map data, information indicating whether each facility is a prominent facility is set in advance. Then, the navigation apparatus 300 extracts famous facilities from facilities existing within a predetermined range from the position 1513 (for example, the municipality to which the position 1513 belongs), and displays this list as spot information 1543. Thereby, the navigation apparatus 300 can guide the user to a predetermined facility around the position 1513.

In addition, since the vicinity of the position on the outline of the reachable range 1531 is a position where it is estimated that the energy held by the own vehicle will be lost, the importance of the facility capable of supplying energy to the own vehicle is extremely high. For this reason, the navigation apparatus 300 may preferentially display facilities that can supply energy to the own vehicle such as a power supply facility or a gas station in the spot information 1543 to guide the user.

FIG. 15C is an explanatory diagram (part 3) of an example of a specific display by the navigation device of the present embodiment. When the position designated by the user within the designated reception range is changed, the navigation device 300 changes the display position and display content of the area information in accordance with this change. In the example illustrated in FIG. 15C, the position is changed from the position 1512 specified by the user to the position 1514.

In this case, the navigation apparatus 300 displays the area information 1550 on the display 313 as shown in FIG. The area information 1550 is area information corresponding to the position 1514. Specifically, the area information 1550 is area information of the position 1515 on the outline 1531 closest to the position 1515. For this reason, as shown in FIG. 15C, the display content of the area information 1550 is different from the area information 1540 at the position 1513 shown in FIG.

Further, for example, when the user changes the position designated from the position 1513 to the position 1515 as indicated by an arrow 1560 in FIG. 15C, the navigation device 300 displays the area information so as to follow this change. Also good. Specifically, in this case, the navigation apparatus 300 displays a position between the position 1513 and the position 1515 (for example, the position 1516 or the position in FIG. 15-3) after the area information 1540 is displayed and before the area information 1550 is displayed. 1517) is displayed.

In FIGS. 15-1 to 15-3, the position on the map 1510 included in the dotted line 1531 is set as the designated reception range, but the present invention is not limited to this. Similar to the example described above with reference to FIG. 1-2, the navigation apparatus 300 sets the boundary line of the designated reception range inside the outline 1531, and the position on the map 1510 between the boundary line and the dotted line 1531 May be set as the designated reception range.

As described above, the navigation device 300 displays the reachable range of the host vehicle on the display 313. As a result, the navigation device 300 can guide the user how far the vehicle can reach with the energy held by the host vehicle, assisting the user in planning the movement plan based on the reachable range of the host vehicle, Convenience can be improved.

Further, when the reachable range is displayed, the navigation apparatus 300 displays the map at a scale that allows the reachable range to fit on one screen of the display 313. Thereby, the navigation apparatus 300 can guide the reachable position in this direction on the display screen 313 of the display 313 regardless of which direction the user proceeds. Therefore, the navigation apparatus 300 can support the planning of the user's movement plan based on the reachable range of the host vehicle, and can improve the convenience for the user. This also allows the user to determine the destination after confirming the entire reachable range.

Also, from the viewpoint of ensuring the visibility of the map, the navigation device 300 simplifies information to be displayed on the map, for example, as the map scale is smaller. In other words, the navigation device 300 can display a larger amount of information (detailed information) on the map and guide the information to the user as the scale of the map is larger. Therefore, the navigation apparatus 300 displays a map with the largest scale among the scales that can display the entire reachable range of the host vehicle, thereby guiding the user through the reachable entire area and providing more information to the user. The user can be guided, and the convenience of the user can be improved.

Further, the navigation device 300 sets the latitude and longitude information of the position on the map included in the designated reception range according to the scale of the map displayed on the display 313. Specifically, the navigation device 300 sets a larger number of latitude / longitude information as the designated reception range when a smaller scale map is displayed. Thereby, the navigation apparatus 300 secures the area of the designation | designated reception range on a display screen, and a user's operativity at the time of designating the position in a designation | designated reception range falls as the scale of a map becomes small. Can be prevented, and convenience for the user can be improved.

Further, when the navigation apparatus 300 receives designation of a position on the map displayed on the display 313 from the user, the navigation apparatus 300 can display regional information corresponding to this position if the position is within the designated reception range. . Thereby, the navigation apparatus 300 can guide the user to the area near the outline of the reachable range of the host vehicle desired by the user (that is, near the reachable position of the host vehicle). Thereby, the navigation apparatus 300 can guide the user what area is included in the reachable range even if the map is displayed at a small scale, and the convenience of the user can be improved. . Furthermore, the navigation apparatus 300 may display different regional information depending on the scale of the displayed map when the designation of the position within the designated acceptance range is accepted. For example, when the navigation apparatus 300 receives a designation of a position within the designated reception range while displaying a map at a scale of 1 million, the navigation apparatus 300 centers the name of the municipality and spot information corresponding to this position and this position. Display a map. On the other hand, when the navigation apparatus 300 accepts designation of a position within the designated acceptance range while displaying a map at a scale of 10,000, the navigation apparatus 300 displays spot information corresponding to this position and a map centered on this position. (For example, in the case of a scale of 1 in 10,000, the municipality name is already displayed on the map).

(Embodiment 2)
Next, a second embodiment of the present invention will be described. FIG. 16 is a block diagram illustrating an example of a functional configuration of the display control system according to the second embodiment of the present invention. As shown in FIG. 16, the display control system 1600 of the second embodiment is configured by a server 1610 and a terminal 1620, and each of the functional units of the server 1610 and the terminal 1620 includes the display control device 100 described in the first embodiment. Realize the function.

The server 1610 generates various information used by the terminal 1620 mounted on the moving body for display control of the display unit 110 and transmits the information to the terminal 1620. For example, the server 1610 generates information indicating the reachable range of the mobile object and regional information of the position specified by the user, and transmits the information to the terminal 1620. The terminal 1620 may be mounted on a mobile body, may be used as a mobile terminal in the mobile body, or may be used outside the mobile body as a mobile terminal. The terminal 1620 receives various information used for display control of the display unit 110 from the server 1610.

16, the server 1610 includes a server reception unit 1611, an estimation unit 104, and a server transmission unit 1612. The terminal 1620 includes a terminal reception unit 1621, a display control unit 101, a reception unit 102, an acquisition unit 103, and a terminal reception unit 1622. In addition, in the display control system 1600 shown in FIG. 16, the same code | symbol is attached | subjected to the component same as the display control apparatus 100 shown in FIG. 1, and description is abbreviate | omitted.

In the server 1610, the server reception unit 1611 receives the information transmitted from the terminal 1620. Specifically, for example, the server reception unit 1611 receives information on a mobile body from a terminal 1620 connected to a communication network such as a public line network, a mobile phone network, DSRC, LAN, and WAN via a radio. The information related to the moving object can be current position information indicating the current position of the moving object, or information related to the initial amount of energy that is the amount of energy held by the moving object at the current position of the moving object. That is, the information received by the server reception unit 1611 is various information used by the estimation unit 104 to estimate the reachable range.

The server transmission unit 1612 transmits information indicating the reachable range of the mobile object estimated by the estimation unit 104 to the terminal 1620. Specifically, for example, the server transmission unit 1612 transmits information to a terminal 1620 connected to a communication network such as a public line network, a mobile phone network, a DSRC, a LAN, or a WAN via a radio. In addition, the server transmission unit 1612 may transmit map data necessary for the terminal reception unit 1621 to display the reachable range of the moving object on the display unit 110.

The terminal 1620 is connected to the server 1610 in a communicable state via, for example, an information communication network of a mobile terminal or a communication unit (not shown) provided in the own device. In terminal 1620, terminal reception unit 1621 receives information transmitted from server 1610. Specifically, the terminal receiving unit 1621 receives information indicating the reachable range of the mobile object. Further, the terminal receiving unit 1621 may receive map data necessary for displaying the reachable range of the moving object on the display unit 110. More specifically, for example, the terminal receiving unit 1621 receives information from a server 1610 that is connected to a communication network such as a public line network, a mobile phone network, DSRC, LAN, and WAN via a wireless connection.

The terminal transmission unit 1622 transmits the information about the moving object acquired by the acquisition unit 103 to the server 1610. Specifically, for example, the terminal transmission unit 1622 transmits information related to the mobile unit to a server 1610 connected to a communication network such as a public line network, a mobile phone network, DSRC, LAN, and WAN via a wireless connection.

As described above, according to the display control system 1600 of the second embodiment, the same effect as that of the display control device 100 of the first embodiment can be obtained.

As described above, according to the present invention, it is possible to guide the user what kind of area is included in the displayed reachable range, and to create a user movement plan based on the reachable range. To improve user convenience.

The display control method described in the first and second embodiments is realized by executing a prepared program on a computer such as a personal computer, a workstation, or a mobile terminal (for example, a navigation device or a mobile phone). can do. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. The program may be a medium that can be distributed via a network such as the Internet.

DESCRIPTION OF SYMBOLS 100 Display control apparatus 101 Display control part 102 Reception part 103 Acquisition part 104 Estimation part

Claims

Display control means for displaying the reachable range of the moving object on a map;
Accepting means for accepting designation of a position on a map within a predetermined range from the outline of the reachable range;
With
The display control means displays area information corresponding to the position when the accepting means accepts designation of the position.
A display control device characterized by that.
2. The display control apparatus according to claim 1, wherein the display control means displays the reachable range and the area information in association with each other at the same time.
3. The display control apparatus according to claim 1, wherein the area information includes at least information of a municipality name corresponding to the position.
Current position acquisition means for acquiring the current position of the moving body;
Estimating means for estimating the reachable range of the moving body;
Designated position obtaining means for obtaining information of a position within a predetermined range from an outline of the reachable range designated by the reception unit;
Transmitting means for extracting area information corresponding to the position acquired by the designated position acquisition means, and transmitting the area information to a terminal device;
A server device comprising:
A display control method performed by a display control device,
A first display step of displaying the reachable range of the moving object on a map;
An accepting step of accepting designation of a position on a map within a predetermined range from an outline of the reachable range;
A second display step for displaying area information corresponding to the position when the designation of the position is accepted in the acceptance step;
A display control method comprising:
A display control program for causing a computer to execute the display control method according to claim 5.
A recording medium on which the display control program according to claim 6 is recorded.