JP2011252754A - On-vehicle navigation device and route guidance method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle navigation device and a route guidance method that are capable of guiding an optimum route in accordance with whether a destination facility is a facility within a certain regulation area.SOLUTION: An on-vehicle navigation device is provided with: display means; information input means; map data storage means storing map data including information regarding regulation areas indicating that only vehicles satisfying prescribed conditions are passable; memory means storing passability/impassability information indicating whether one's own vehicle can pass through a regulation area; and control means searching a guide route to a destination. When the control means determines that one's own vehicle is a vehicle that can not pass through a regulation area, it performs search and guidance of a route that does not enter the regulation area if a destination is outside the regulation area, or if a destination is within the regulation area, it guides a route leading to the outside of the regulation area or performs search and guidance of a route leading to the destination but not using the vehicle within the regulation area.

Description

  When there is a restricted area where only authorized vehicles can pass, the present invention provides appropriate route guidance depending on whether the destination is inside or outside the restricted area and whether the vehicle can pass through the restricted area. The present invention relates to an in-vehicle navigation device and a route guidance method having a function to perform.

  Conventional typical vehicle-mounted navigation devices include a control device such as a CPU that controls all processes related to navigation, a storage device such as a DVD (Digital Versatile Disk) -ROM or an IC memory card that stores map data in advance, It has a display device, a GPS (Global Positioning System) receiver, a detection device for detecting the current position and current direction of the vehicle, such as a gyroscope and a vehicle speed sensor. Then, the control device reads out map data including the current position of the vehicle from the storage device, displays a map image around the vehicle position on the display device screen based on the map data, and indicates the current position of the host vehicle. The vehicle position mark to be displayed is superimposed on the map image, the map image is scrolled according to the movement of the vehicle, the map image is fixed on the screen and the vehicle position mark is moved, and where the vehicle is currently located. You can see at a glance whether you are driving.

  In-vehicle navigation devices are usually equipped with a function (route guidance function) that guides a user so that the user can easily travel on the road without making a mistake. According to this route guidance function, the optimal route (typically the route with the lowest cost) that connects from the departure point (typically the current position of the vehicle) to the destination using the map data by the control device. Is automatically searched by performing simulation calculation such as horizontal search method or Dijkstra method, and the searched route is stored as a guide route, and the guide route can be distinguished from other roads on the map image while driving (For example, change the color or increase the line width), or when the vehicle approaches a predetermined distance to the intersection where the course should be changed on the guidance route, the intersection on the map image By displaying a guide map (enlarged view of the intersection, an arrow indicating the direction of travel at the intersection, the distance to the intersection, the name of the intersection, etc.) In which direction to go The user is to be able to grasp.

  In such a route search, a route search is performed based on various search conditions such as whether to give priority to toll roads or to give priority to general roads, and in addition to the search conditions specified by the user, traffic jams and road construction Searches corresponding to various road conditions such as avoiding sections are being conducted.

  For example, Patent Document 1 describes the estimated travel time to the parking lot and the parking time in consideration of the time to walk from the parking lot to the destination when traffic congestion occurs while driving toward the parking lot around the destination. It is possible to present a parking lot and a guide route that minimizes the total estimated walking time from the parking lot to the destination, or to guide you when you get to the destination earlier when you get caught in a traffic jam Are listed.

JP 2004-361325 A

  As described above, the search for the guidance route is performed in consideration of various conditions and road conditions. As an example of restricting the travel of such a road, in order to reduce the influence of harmful substances contained in exhaust gas on the human body, a vehicle that can pass through a predetermined area is restricted. For example, in Germany, “environmental zone” regulations have been introduced with the aim of greatly reducing harmful substances emitted from vehicles. This “environmental zone” regulation displays either red, yellow, or green stickers on vehicles based on the amount of hazardous substance exhaust gas, and only vehicles with these stickers can pass through the “environment zone”. To do.

  At present, even when a facility in the “environment zone” is set as a destination, route search as described above is performed and route guidance to the facility is performed. Therefore, when the target facility exists in the “environment zone”, it is recognized that the vehicle cannot enter for the first time with a sign or the like indicating that the vehicle enters the “environment zone” while driving the vehicle according to the route guidance. For this reason, it is not only necessary to change the destination again, but it may be difficult to travel on which road, which may hinder safe driving.

  In addition, there are cases where a user who owns only a vehicle that cannot enter the environmental zone has to use facilities in the environmental zone. In such a case, even if it is possible to guide the route to the destination in the environmental zone, it is difficult for the user to reach the destination because the vehicle cannot enter the environmental zone.

  The present invention has been made in view of the problems of the prior art, and can be used for in-vehicle vehicles capable of guiding an optimum route depending on whether or not a destination facility is a facility within a specific restricted area. An object is to provide a navigation device and a route guidance method.

  In order to solve the above-described problems of the prior art, according to the basic form of the present invention, only display means, information input means for inputting information instructed by the user, and vehicles satisfying predetermined conditions can pass. Map data storage means in which map data including information on the restricted area indicating that the vehicle is stored; storage means in which passability information indicating whether or not the host vehicle is allowed to pass through the restricted area; and the information input means Control means for searching based on the map data for a guidance route to the destination acquired via the control means, the control means being a vehicle in which the host vehicle is not allowed to travel in the restricted area according to the passability information. If it is determined that the destination is located outside the restricted area, a route that does not enter the restricted area is searched for route guidance, and the destination is located within the restricted area. When The route guidance to the outside of the defined area is performed among the routes searched to the destination, or the route reaching the destination is searched within the restricted area without depending on the vehicle. A vehicle-mounted navigation device is provided.

  In the vehicle-mounted navigation device according to this aspect, when the control unit determines that the destination is located inside the restriction area, and when a parking lot outside the restriction area that satisfies a predetermined condition is searched for The walking path from the parking lot to the destination may be searched for guidance to the destination, and the predetermined condition is that the distance from the parking lot to the destination is a predetermined distance. Alternatively, the time required for walking from the parking lot to the destination may be a predetermined time or less, and the control means may include a parking lot outside the restricted area that satisfies the predetermined condition. When it does not exist, search for public transportation that can move to the destination or near the destination, and search for parking lots outside the restricted area that are used when using the public transportation. Te, it may be carried out guidance to the destination.

  Further, in the in-vehicle navigation device according to this aspect, when the control means determines that the destination is located inside the restriction area, the control means may notify the fact, and the control means When it is determined that the destination is located inside the restricted area, the route guidance display inside the restricted area may not be performed, and the control means may determine that the destination is located inside the restricted area. When the determination is made, the route display inside the restricted area may be displayed in a mode different from the route display outside the restricted area.

  According to another aspect of the present invention, the display means, the information input means for inputting information instructed by the user, and the information on the restriction area indicating that only a vehicle satisfying a predetermined condition can pass. Route guidance performed in a vehicle-mounted navigation device comprising map data storage means storing map data including and storage means storing passability information indicating whether or not the host vehicle is allowed to pass through the restricted area A method for obtaining a destination via the information input means; a step for determining whether the destination is located outside or inside the restriction area; Determining whether the vehicle is permitted to travel inside the vehicle, determining that the host vehicle is not allowed to travel inside the restricted area, and the destination is located outside the restricted area. And when searching for a route to a destination located outside the restricted region on a route that does not enter the restricted region, and when the host vehicle is not allowed to travel inside the restricted region. A route to the destination located inside the restricted area by using a vehicle or a means other than a vehicle when determining and determining that the destination is located inside the restricted area And a route guidance method according to the searched route is provided.

  In the route guidance method according to this aspect, the step of searching for a route to a destination located inside the restricted area using means other than the vehicle includes a parking lot outside the restricted area that satisfies a predetermined condition. And searching for a walking route from the parking lot to the destination, wherein the predetermined condition is that a distance from the parking lot to the destination is a predetermined distance or less, Alternatively, the time required for walking from the parking lot to the destination may be a predetermined time or less, and when a parking lot outside the restricted area that satisfies the predetermined condition is not searched, A step of searching for public transportation that can move to the destination or near the destination, and a step of searching for a parking lot outside the restricted area that is used when using the public transportation. And, it may be included.

  In the route guidance method according to this embodiment, in the step of searching for a route to a destination located inside the restricted area using the vehicle, the fact that the destination is located inside the restricted area is notified. In the route guidance step, the route guidance display outside the restriction area may be performed and the route guidance display inside the restriction area may not be performed. In the step of searching for a route to the destination located at the position, the fact that the destination is located inside the restricted area is notified, and in the step of performing the route guidance, a route guidance display outside the restricted area is performed. The route guidance display inside the restriction area may be displayed in a different manner from the route guidance display outside the restriction area.

  According to the vehicle-mounted navigation device and the route guidance method of the present invention, whether the destination is located inside or outside the restricted area when the host vehicle cannot travel in the restricted area such as the “environment zone”. The route search according to is performed. For example, when the destination is located outside the restricted area, a route search is performed so as to avoid traveling in the restricted area, and when the destination is located within the restricted area, route guidance based on vehicle travel within the restricted area is performed. Instead, it provides route guidance using walking or public transportation.

  As a result, it is possible to prevent the vehicle from entering the restricted area by mistake when the vehicle is a vehicle that is not allowed to pass through the restricted area, and appropriate even if the destination is located inside or outside the restricted area. It is possible to provide route guidance to the destination.

It is a block diagram which shows the structure of the vehicle-mounted navigation apparatus which concerns on one Embodiment of this invention. It is a figure which shows an example of the "environment zone" which is a control area. It is an example of the setting menu of the information which shows whether the own vehicle can pass through a control area. It is a flowchart which shows an example of the route guidance process in consideration of the control area. It is a figure which shows an example of a path | route display when a destination is located outside an environmental zone. It is a flowchart (the 1) which shows an example of the route guidance process when the destination is located inside a control area. It is an example of a menu for setting whether or not to display a route when the destination is located inside the restricted area. It is a figure which shows the example of a display of a confirmation screen when a destination is located inside a control area, and a guidance route. It is a flowchart (the 2) which shows an example of the route guidance process when a destination is located inside a control area. It is a figure which shows the setting menu of search conditions. It is a figure which shows the calculation result and selection screen of the optimal path | route for every predetermined conditions when a destination is located inside a control area. It is a figure which shows the example of a display of the guidance path | route by means other than a vehicle when a destination is located inside a control area.

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

(Configuration of in-vehicle navigation system)
FIG. 1 is a block diagram showing a configuration of an in-vehicle navigation device 100 according to an embodiment of the present invention.

  In the figure, 1 is a DVD drive, and 1a is a storage medium in which map data and other guidance data are stored. In the present embodiment, the DVD-ROM 1a is used as a storage medium for storing such data, but a hard disk or other storage medium may be used. The map stored here is divided into longitude and latitude widths of appropriate sizes according to each scale level such as 1/1500, 1/25000, 1 / 50,000, 1/10000, etc. Roads, buildings, facilities, and other various properties included in are stored as a coordinate set of points (nodes) expressed in longitude and latitude. Map data includes (1) a road layer composed of road link data, intersection data, node data, etc., (2) a background layer for displaying roads, buildings, parks, rivers, etc. on a map image, and (3) a municipality. It consists of a character / symbol layer for displaying administrative division names such as names, road names, intersection names, characters, map symbols, and the like.

  In the road layer, the road link data supplies attribute information of each road. For each link constituting the road, the type of road (national road, highway, prefectural road, other road), hierarchization of the road network It consists of data such as the level, the number of nodes constituting the link, the road number (road name), and the width of the link connecting each node. The intersection data is a set of nodes closest to the intersection among the nodes on the link coupled to the intersection. The node data is a list of all nodes constituting the road, and includes position information for each node, information for identifying whether the node is an intersection or not, and the like.

  Further, in the present embodiment, in order to perform navigation for pedestrians, pedestrian data such as a road for exclusive use of pedestrians, a park where a vehicle cannot enter, a passage in a station square, and a pedestrian bridge are included.

  An operation unit 2 is provided with operation buttons and the like for operating the navigation apparatus body 10. In the present embodiment, the operation unit 2 includes a remote control transmitter, and the user can also operate the navigation apparatus body 10 with the remote control transmitter at hand.

  Also, 3 receives GPS signals sent from a plurality of GPS satellites and generates and outputs GPS data such as longitude, latitude, PDOP (Position DOP) value and HDOP (Horizontal DOP) value of the current position of the vehicle. A GPS receiver is shown. Reference numeral 4 denotes a self-contained navigation sensor. The self-contained navigation sensor 4 is composed of an angle sensor such as a gyro that detects a vehicle rotation angle, and a travel distance sensor that generates a pulse at every constant travel distance.

  In addition, 5 is a communication device such as an in-vehicle telephone for communicating with various service centers, and 6 is a VICS reception for receiving VICS (registered trademark) (road traffic information communication system) information transmitted from a radio wave beacon or an optical beacon. Indicates the machine. These beacons are installed on the roadside and connected to police stations, road managers and integration centers to provide information on traffic jams in the vicinity.

  Reference numeral 7 denotes a display unit such as a liquid crystal panel. The navigation device body 10 displays a map around the current position of the vehicle on the display unit 7, a guidance route from the departure point to the destination, a vehicle mark, Other guidance information is displayed. The display unit 7 is provided with a touch panel on the screen, and is configured with various buttons paired with the display content of the display screen. The touch panel serves as an input device for selecting a menu or the like indicated by these various buttons. Reference numeral 8 denotes a speaker for providing guidance information to the user by voice.

  The navigation device body 10 is composed of the following. Reference numeral 11 denotes a buffer memory that temporarily stores map data read from the DVD-ROM 1a via the DVD drive 1.

  Reference numeral 12 denotes a control unit constituted by a microcomputer. The control unit 12 has a built-in navigation program, and calculates the current position of the vehicle based on a signal output from the GPS receiver 3 or a signal output from the self-contained navigation sensor 4 according to the program. Or the map data to be displayed is read from the DVD-ROM 1a to the buffer memory 11 via the DVD drive 1 or from the destination to the destination under the search conditions set using the map data read to the buffer memory 11. Various processes are executed, such as searching for a guide route up to. Further, as will be described later, it is determined whether or not the vehicle is permitted to travel in a specific restricted area, and if not permitted, the destination exists outside or inside the restricted area. Depending on the situation, the optimum guidance route is searched.

  13 is a map drawing unit for generating a map image using the map data read out to the buffer memory 11, and 14 is for generating various menu screens (operation screens) and various marks such as vehicle position marks and cursors according to the operation status. This is the operation screen / mark generator.

  Reference numeral 15 denotes a guide route storage unit that stores the guide route searched by the control unit 12, and 16 denotes a guide route drawing unit that draws the guide route. The guidance route storage unit 15 stores all the nodes of the guidance route searched by the control unit 12 from the departure point to the destination. When displaying the map, the guide route drawing unit 16 reads the guide route information from the guide route storage unit 15 and draws the guide route with a color and line width different from those of other roads.

  Reference numeral 17 denotes a storage unit composed of a memory such as an EEPROM connected to the control unit 12, and temporarily stores information on a specific restricted area and information on a facility searched by a peripheral facility search. In addition, data on railway lines that are public transportation is stored. The railway line data includes position information of each station on each line and operation time data (timetable data).

  An audio output unit 18 supplies an audio signal to the speaker 8 based on a signal from the control unit 12. Reference numeral 19 denotes an image composition unit, on which a map image drawn by the map drawing unit 13 is overlaid with various marks and operation screens generated by the operation screen / mark generation unit 14, a guidance route drawn by the guidance route drawing unit 16, and the like. And output to the display unit 7.

  In the in-vehicle navigation device 100 configured as described above, as a basic operation, the control unit 12 is based on the GPS signal received by the GPS receiver 3 and the signal input from the autonomous navigation sensor 4. Detect current position. Then, map data around the vehicle is read from the DVD-ROM 1 a via the DVD drive 1 and stored in the buffer memory 11. The map drawing unit 13 generates a map image based on the map data read to the buffer memory 11 and displays a map image around the host vehicle on the screen of the display unit 7 via the image composition unit 19.

  Moreover, the control part 12 detects the present position of the own vehicle based on each signal input from the GPS receiver 3 and the self-contained navigation sensor 4 with the movement of the own vehicle, and according to the detection result, the display part 7 The vehicle position mark is superimposed on the map image displayed on the screen, and the vehicle position mark is moved as the host vehicle moves, or the map image is scrolled.

  Further, when the user operates the operation unit 2 to set a destination and other necessary information (information about a waypoint on the way to the destination, etc.), the control unit 12 reads from the GPS receiver 3 and the autonomous navigation sensor 4. The current position of the vehicle detected based on each of the signals is used as a starting point, and a route with the lowest traffic cost from the starting point to the destination is searched using the map data of the DVD-ROM 1a. Then, the route obtained by the search is stored in the guidance route storage unit 15 as a guidance route, and the guidance route is superimposed on the map image on the screen on the display unit 7 via the guidance route drawing unit 16 and the image composition unit 19. Display together. At this time, the guidance route is displayed in a display mode different from other roads (for example, the line width is increased or the color is displayed in a conspicuous color) so that the user can easily identify the route. Thus, the control unit 12 appropriately outputs guidance information as the host vehicle travels, and guides the host vehicle to travel along the guidance route to the destination.

  With reference to FIGS. 2 to 12, a description will be given of route search processing in consideration of the restriction region in the vehicle-mounted navigation device 100 configured as described above. First, a restriction area such as an “environment zone” will be described with reference to FIG. Next, setting of an index indicating whether or not the own vehicle is a vehicle permitted to pass in the restricted area will be described with reference to FIG. Next, the route guidance process when the destination exists outside and inside the restricted area will be described with reference to FIGS.

  FIG. 2A shows an example of the regulation area 22 designated as the “environment zone” in the German city 21. In the “environment zone”, vehicles that can pass through the area 22 are regulated according to the exhaust gas standard. By satisfying the exhaust gas standard, a passage permission sticker indicating that the vehicle can pass through the environmental zone is attached to the vehicle. For example, vehicles registered before January 1, 1997 do not have a permission sticker and cannot travel in the environmental zone. Vehicles registered during the period from January 1, 1997 to December 31, 2000 are attached with a red permission sticker, and vehicles registered during the period from January 1, 2001 to December 31, 2005 are registered. A yellow permit sticker is affixed to vehicles registered on or after January 1, 2006, and a green permit sticker is affixed.

  FIG. 2B shows an example of a red traffic permission sticker 23, a yellow traffic permission sticker 24, and a green traffic permission sticker 25. Each of the passage permission stickers in FIG. 2B is displayed with diagonal lines or horizontal lines, but actually, it is displayed with a corresponding color.

  FIG. 2 (c) and FIG. 2 (d) show environmental zone indicators. The driver is alerted by a sign 26 indicating the environmental zone and a sign (27a, 27b) indicating a vehicle capable of traveling in the environmental zone. FIG. 2 (c) shows that the area 22 of FIG. 2 (a) is an environmental zone, and shows that a vehicle with a red, yellow, and green passage permission sticker can travel to the environmental zone. FIG. 2D shows that the region 22 in FIG. 2A is an environmental zone, and only the vehicle with the green passage permission sticker can travel to the environmental zone.

  This environmental zone (regulated area) is classified into a plurality of levels according to exhaust gas standards and the like. For example, an area where a vehicle with a red passage permission sticker can pass is an area of restriction level 2, and an area where a vehicle with a yellow passage permission sticker can pass is an area of restriction level 3 and restriction level 2. The areas where the vehicle with the green passage permission sticker is allowed to pass are areas of restriction level 4, restriction level 3 and restriction level 2.

  FIG. 3 is a diagram illustrating an example of a setting process of the restricted area passage permission information of the vehicle. When the “Setting” button 42 is selected in the information setting menu 41 in FIG. 3A, a setting menu 43 in FIG. 3B is displayed. When the “Other” button 44 is selected in the setting menu 43 and the “Environmental Zone” button 45 is selected, the passage permission sticker mark selection screen 46 shown in FIG. 3C is displayed. On the passage permission sticker mark selection screen 46, three kinds of passage permission sticker marks are displayed. Among these passage permission sticker marks, the passage permission sticker attached to the own vehicle is selected.

  Information on the selected passage-permitted sticker is set as a restriction area passage permission index and stored in the storage unit 17. In this setting, a value corresponding to the type of the selected passage permission sticker (exhaust gas regulation level) is set. For example, the level (for example, level 2 for red, level 3 for yellow, and level 4 for green) corresponding to the selected traffic-permitted sticker among the traffic-permitted stickers in FIG. . The registered level is also called the environment (regulation) correspondence level of the host vehicle. Further, when the host vehicle cannot pass through the restricted area, “impossible” is set in the restricted area passability indicator.

  The restriction level of the host vehicle is set by the series of operations described above.

  For information on whether or not the restricted area can be passed, a camera capable of capturing the vehicle is provided, and an image obtained by capturing the vehicle with the camera is analyzed to detect whether or not a passage permission sticker is attached. You may make it acquire by.

  FIG. 4 is a flowchart illustrating an example of route guidance processing performed by the control unit 12 in consideration of an environmental zone that is a restricted area.

  First, in step S11, a destination is acquired. For example, the destination is acquired by designating a point on the map displayed on the display unit 7 or inputting the destination address via the operation unit 2.

  In the next step S12, information indicating whether the host vehicle can pass through the restricted area is acquired. This information is acquired from the information on the passage permission sticker stored in the storage unit 17 by the series of operations shown in FIG.

  In the next step S13, it is determined whether the destination acquired in step S11 is located inside or outside the restricted area. This is done by referring to the position data of the destination and determining whether or not it is located within the restricted area. When it is located outside the restricted area, the process proceeds to step S14, and when it is located inside the restricted area, the process proceeds to step S17.

  In the next step S14, it is determined whether or not the own vehicle can pass inside the restricted area. The determination is made based on the restricted area passability information acquired in step S12. When the environmental zone mark is selected, it is determined that the host vehicle can pass through the restricted area. On the other hand, when the environmental zone mark is not selected, it is determined that the host vehicle cannot pass through the restricted area.

  In the next step S15, since the host vehicle can pass inside the restricted area, a route search including the travel route inside the restricted area is performed. For example, in the route search, the link cost of the route from the departure point (the node at the current position of the vehicle) to the destination node is added, and the route with the lowest link cost is selected.

  On the other hand, when it is determined in step S14 that the host vehicle is not allowed to travel inside the restricted area, the process proceeds to step S18, and a route search to the destination is performed while avoiding the travel route inside the restricted area. The route search that avoids the travel route inside the restricted area is performed by removing the link included in the restricted area from the route calculation target. Further, in the route cost calculation, the route cost for the link included in the restricted area may be made larger than usual so that the link is less likely to be included in the set route.

  FIG. 5 is a diagram illustrating an example of a result of the guidance route search when the destination is located outside the restricted area. FIG. 5A shows a route search result when the host vehicle can pass through the restricted area, and FIG. 5B shows a route search result when the host vehicle cannot pass through the restricted area. Yes.

  In FIG. 5, in order to distinguish between the inside and outside of the restricted area, the road in the restricted area is displayed in a different manner from the road outside the restricted area. In FIG. 5, the road 52 existing in the restricted area is displayed with a double line, but may be displayed in a color different from the road outside the restricted area, for example. Further, as shown in FIG. 2A, the boundary line may be displayed so that the boundary inside and outside the restricted area can be seen.

  In FIG. 5, the vehicle position CM is located outside the restriction area, and the destination G is located on the opposite side of the vehicle position CM across the restriction area.

  FIG. 5A corresponds to the result of the route search in step S15, and the optimum route 53a from the vehicle position CM traveling on the road 52 in the restricted area to the destination G is calculated and displayed. On the other hand, FIG. 5B corresponds to the result of the route search in step S18, and the optimum route 53b from the vehicle position CM to the destination G is calculated and displayed avoiding the road 52 in the restricted area. .

  The restriction area is classified into a plurality of restriction levels (for example, restriction level 2 to restriction level 4), and the restriction response level of the host vehicle corresponds to the restriction level (for example, restriction support level 2 to restriction support level 4). ) If present, the determination in step S14 is performed in consideration of the restriction level of the host vehicle and the restriction level of the restriction area. For example, when the restriction level of the host vehicle is level 4, it is possible to travel on roads in all the restriction areas, and when the restriction level of the host vehicle is level 3, the restriction level 2 and the restriction level 3 restriction. Roads within the area can travel, but roads within the restriction area of restriction level 4 cannot travel. When the restriction levels are set in a plurality of stages as described above, it is determined whether or not the own vehicle can travel in the restriction area in consideration of the restriction response level of the own vehicle and the restriction level of the restriction area.

  In the next step S16, route guidance is performed according to the route (53a, 53b) searched in step S15 or step S18.

  On the other hand, when it is determined in step S13 that the destination is located inside the restricted area, a route search process to the destination in the restricted area is performed in step S17.

  The route guidance process when the destination is located inside the restricted area will be described with reference to FIGS. FIG. 6 is a flowchart illustrating an example of route guidance processing performed by the control unit 12, and FIGS. 7 and 8 are diagrams illustrating an example of route guidance.

  In step S20 of FIG. 6, it is determined whether or not the own vehicle can pass inside the restricted area. The determination is made based on the restricted area trafficability information acquired in step S12 of FIG. When the environmental zone mark is selected, it is determined that the host vehicle can pass through the restricted area. On the other hand, when the environmental zone mark is not selected, it is determined that the host vehicle cannot pass through the restricted area.

  When the passage is impossible, the process proceeds to step S21, and a confirmation screen indicating that the passage is not possible is displayed. When the passage is possible, the process proceeds to step S25.

  In the next step S22, it is determined whether or not the display setting of the route in the restricted area is “On”. When the display setting is “On”, the process proceeds to step S23. When the display setting is not “On”, the process proceeds to step S27.

  The route display setting is set in advance by a route display setting menu shown in FIG. When “Routing” is selected from the setting menu 43 in FIG. 7A, a routing setting screen 71 in FIG. 7B is displayed. By selecting the “On” button 72a or the “Off” button 72b of the environmental zone routing on the routing setting screen 71, it is set whether or not to display the route in the restricted area. When the “On” button 72a is selected, the route of the search result inside the restricted area is displayed, and when the “Off” button 72b is selected, the route of the search result inside the restricted area is not displayed.

  In the next step S23, the guidance route in the restriction region is displayed in a different mode from the guidance route outside the restriction region, for example, in a different color. On the other hand, if the display setting of the route in the restricted area is not “On”, the guide route in the restricted area is not displayed in step S27, and the normal map display is maintained.

  FIG. 8 is a screen displayed when the host vehicle cannot travel in the restricted area. FIG. 8A shows an example of a confirmation screen 81 corresponding to the process of step S21 and indicating that the destination exists inside the restricted area.

  FIGS. 8B and 8C show route guidance diagrams when route guidance is performed to the outside of the restricted area. FIG. 8B shows an example of a guide map corresponding to the process of step S23, in which the guide route in the restricted area is displayed in a different manner from the guide route outside the restricted area. In the map screen 82a in FIG. 8B, the road 83 in the restricted area is displayed with a double line to distinguish it from the road outside the restricted area. A guide route is searched for to the destination G in the restricted area, and the guide route 84b up to the point just before the restricted area and the guide route 84a in the restricted area are displayed in different modes, for example, in different colors.

  FIG. 8C corresponds to the process of step S27, and shows an example in which a guide route outside the restriction region is displayed without displaying the guide route in the restriction region. Similarly to the map screen 82a of FIG. 82B, the map screen 82b of FIG. Further, although the guidance route is searched for to the destination G in the restriction area, only the guidance route 84b up to the point immediately before the restriction area is displayed.

  In the next step S24, route guidance up to immediately before the restricted area is performed according to the guidance route.

  On the other hand, if it is determined in step S20 that the host vehicle can pass through the restricted area, a route search to the destination is performed in step S25, and route guidance is performed in accordance with the searched guidance route in step S26. .

  Next, another route guidance process when the destination is located in the restricted area will be described with reference to FIGS. 9 to 12. FIG. 9 is a flowchart showing an example of route guidance processing performed by the control unit 12, and FIGS. 10 to 12 show examples of screens corresponding to the processing.

  First, in step S30, route search conditions are acquired. FIG. 10 shows the search condition setting menu, and FIG. 10A shows a routing setting screen 71 displayed when “Routing” in the setting menu 43 is selected.

  The condition for route calculation is specified by a route calculation setting menu on the routing setting screen 71 shown in FIG. When the “Off” button 73b of the route calculation setting menu is selected, a route search is performed under the conditions of “Economy”, “Fast”, and “Easy” in the calculation mode 74. As a result of the search, as shown in FIG. A simple selection screen 111 is displayed. On the other hand, when the “On” button 73a in the route calculation setting menu is selected, one of the calculation modes 74 is selected, and the route search result selection screen as shown in FIG. 11 is omitted. For example, when the “Economy” mode is selected, a route with the least cost is searched and route guidance is performed.

  When “Manual” in the calculation mode 74 is selected, search condition setting menus 101a and 101b shown in FIGS. 10B and 10C are displayed. In the search condition setting menu 101a, a public transportation selection button 102 to be used and a walking time setting button 103 are displayed. The public transport selection button 102 can select either a train, a bus, or a taxi. In addition, the walking time setting button 103 can select the walking time within 10 minutes, within 20 minutes, within 30 minutes, or within 1 hour.

  By operating the screen moving button 104 of the search condition setting menu 101a, the search condition setting menu 101b is moved. In the search condition setting menu 101b, a station designation button 105 for designating a station when using a train and a route designation button 106 for designating a train route are displayed. When a station is specified or a route is specified, a screen (not shown) for inputting a station name and a route name is further displayed.

  In the next step S31, it is determined whether or not the own vehicle can pass inside the restricted area. The determination is made based on the restricted area trafficability information acquired in step S12 of FIG. When the environmental zone mark is selected, it is determined that the host vehicle can pass through the restricted area. On the other hand, when the environmental zone mark is not selected, it is determined that the host vehicle cannot pass through the restricted area.

  When it is determined that the vehicle can pass, the process proceeds to step S36. When it is determined that the vehicle cannot pass, the process proceeds to step S32.

  In the next step S32, a parking lot existing outside the restricted area and having the shortest distance from the destination is searched and specified. The search for the parking lot is performed by setting predetermined conditions in the peripheral facility search. That is, the control unit 12 refers to the map data read to the buffer memory 11 and searches for a parking lot that exists in a map in a predetermined range.

  When searching for a parking lot, information on a parking lot such as a vacancy situation and the number of parking lots may be acquired from an information center, VICS, or the like, and a parking lot with a vacancy may be searched.

  In the next step S33, a route by walking from the parking lot specified in step S32 to the destination is searched. Search is performed using the pedestrian data for calculating the walking route in the map data including the parking lot to the destination.

  When a plurality of routes are searched, the route that reaches the destination in the shortest time is selected. The time taken from the parking lot to the destination is calculated based on the speed of walking and the distance from the searched parking lot to the destination. The walking speed of a person is, for example, 5 km / h, and can be set as appropriate.

  In the next step S34, it is determined whether or not the time required for walking from the parking lot to the destination is within a predetermined time set in the walking time setting menu 103, for example, within 20 minutes. When it is within the predetermined time, the process proceeds to step S35, and when it exceeds the predetermined time, the process proceeds to step S38.

  In the next step S35, route guidance including walking routes is performed. When a walking route is searched for to the destination, the route data may be transmitted to a mobile terminal such as a mobile phone. Thereby, after getting off the vehicle at the parking lot, the destination can be reached without hesitation.

  On the other hand, in step S, which is shifted to when it is determined in step S34 that the time taken to reach the destination on foot exceeds a predetermined time, data such as a public transportation fee and timetable are acquired. That is, when it takes time to go to the destination on foot, the moving means set in the use public transport setting menu 102 is used to the destination in the restricted area. The cost and timetable data required at that time are extracted from the data stored in the storage unit 17 in advance. Further, it may be connected to an information center via the communication device 5 to acquire data such as a timetable.

  In the next step S39, an optimum route for each predetermined condition is calculated. In the route search, the road data is searched using a data structure in which an intersection or the like is a node and a link is between nodes. A train route is also searched as a data structure similar to the road data. For example, it is assumed that the data structure has a station as a node and a link between stations. Based on the train operation time data, when there is a transfer, a connectable train is selected, and a route to the nearest station of the destination is searched.

  In this route search, a search for a parking lot near the station on the train route to be used and a search for a walking route from the parking lot to the station are performed. Information regarding whether or not a parking lot is installed at the station may be given as information about the station, and if a parking lot is installed, guidance may be given to use the parking lot.

  In the next step S40, an optimum route selection screen is created and displayed. FIG. 11 is a diagram showing an example of the selection screen. In FIG. 11, three routes are displayed: the route with the lowest cost (Economy Route), the route that reaches the destination the earliest (Fast Route), and the simplest route (Easy Route) with the least number of transfers. ing. The control unit 12 stores one of these selected routes in the guidance route storage unit 15. FIG. 11 shows a state where the route with the lowest charge is selected.

  In the next step S41, route guidance based on the route specified on the selection screen 111 is performed. The control unit 12 performs route guidance according to the route stored in the guidance route storage unit 15. When the “On” button 73a is selected in the route calculation setting menu and the calculation mode 74 is selected, the selection screen 111 is not displayed, and route guidance is performed according to the calculated route.

  FIG. 12 shows an example of a route guidance diagram displaying the route searched based on the search condition setting menu of FIG. FIG. 12 (a) corresponds to step S35 and shows a route guidance diagram when the vehicle can be moved on foot from a parking lot outside the restricted area to a destination inside the restricted area.

  In the map screen 121 in FIG. 12A, the road 122 in the restricted area is displayed with a double line to distinguish it from the road outside the restricted area. In addition, the guidance route 123a from the destination G to the parking lot P22 outside the restricted area at the shortest distance is displayed, and the walking route 123b from the parking lot P22 to the destination G is displayed in a manner different from the guidance route 123a. ing.

  FIG. 12B corresponds to step S41 and shows a route guide map when using a train as public transportation. Similarly to the map screen 121 in FIG. 12A, the map screen 125 in FIG. 12B also displays the road 126 in the restricted area as a double line, distinguishing it from roads outside the restricted area.

  FIG. 12B shows a route when using a train to the destination G in the restricted area. The parking lot P23 close to the station S1 when using the train is searched, and the guide route 127a to the parking lot P23 and the walking route 127b from the parking lot P23 to the station S1 are displayed in different modes. Furthermore, the train route from the station S1 to the nearest station S3 of the destination G via the station S2 is displayed in a manner different from the vehicle and the walking route. The walking route 127d from the station S3 to the destination G is displayed in the same manner as the walking route 127b.

  On the other hand, when it is determined in step S31 that the host vehicle is allowed to pass through the restricted area, a route search is performed in step S36, and route guidance is performed in accordance with the searched guidance route in step S37.

  As described above, according to the in-vehicle navigation device and the route guidance method of the present embodiment, when the host vehicle is not allowed to travel in the restricted area such as the “environment zone”, the destination is located inside the restricted area. The route search is performed according to whether the user is located or located outside. For example, when the destination is located outside the restricted area, a route search is performed so as to avoid traveling in the restricted area, and when the destination is located within the restricted area, route guidance based on vehicle travel within the restricted area is performed. Instead, it provides route guidance using walking or public transportation.

  As a result, it is possible to prevent the vehicle from entering the restricted area by mistake when the vehicle is a vehicle that is not allowed to pass through the restricted area, and appropriate even if the destination is located inside or outside the restricted area. It is possible to provide route guidance to the destination.

100: In-vehicle navigation device,
1a ... DVD-ROM,
2 ... operation part,
3 ... GPS receiver,
4 ... Self-contained navigation sensor,
7 ... display part,
10 ... navigation device body,
11: Buffer memory,
12 ... control unit,
15 ... guide route storage unit,
16 ... guide route drawing unit,
17 ... storage part,
26, 27 ... environmental zone sign,
51, 82, 121, 125 ... Map screen,
52, 83, 122, 126 ... roads in the environmental zone,
81 ... confirmation screen,
84a ... Guidance route (in the environmental zone)
84b, 123a, 127a ... guidance route (outside environment zone),
71 ... Routing setting screen,
101a, 101b ... Search condition setting menu,
111 ... Route selection screen,
123b, 127b, 127d ... walking route.

Claims (15)

Display means;
Information input means for inputting information instructed by the user;
Map data storage means in which map data including information on a restricted area indicating that only a vehicle satisfying a predetermined condition is allowed to pass;
Storage means for storing passability information indicating whether the host vehicle is allowed to pass through the restricted area;
Control means for searching for a guidance route to the destination acquired via the information input means based on the map data,
The control means enters the restriction area when the destination is located outside the restriction area when the vehicle is determined to be a vehicle that cannot travel in the restriction area based on the passability information. If the destination is located within the restricted area, the route guidance to the outside of the prescribed area among the searched routes to the destination is performed, or A vehicle-mounted navigation device that performs route guidance by searching for a route that reaches the destination without using a vehicle within the restricted area.   When it is determined that the destination is located inside the restricted area, the control means, when a parking lot outside the restricted area satisfying a predetermined condition is searched, from the parking lot to the destination. The in-vehicle navigation device according to claim 1, wherein a walking route is searched for guidance to the destination.   The predetermined condition is that a distance from the parking lot to the destination is a predetermined distance or less, or a time required for walking from the parking lot to the destination is a predetermined time or less. Item 3. The in-vehicle navigation device according to Item 2.   The control means searches for a public transport that can move to the destination or near the destination when there is no parking lot outside the restricted area that satisfies the predetermined condition, and the public transport The in-vehicle navigation device according to claim 3, wherein a parking lot outside the restricted area that is used at the time of use is searched to guide to the destination.   The in-vehicle navigation device according to claim 1, wherein when the control unit determines that the destination is located inside the restriction area, the control unit notifies the fact.   The in-vehicle navigation device according to claim 5, wherein when the control unit determines that the destination is located inside the restricted area, the control unit does not perform route guidance display inside the restricted area.   The control means, when it is determined that the destination is located inside the restricted area, displays a route display inside the restricted area in a mode different from a route display outside the restricted area. Item 6. The in-vehicle navigation device according to Item 5.   The in-vehicle navigation device according to claim 1, wherein the restricted area is an environmental zone in which a vehicle that satisfies a predetermined exhaust gas standard can pass. Display means; information input means for inputting information instructed by a user; and map data storage means for storing map data including information on a restricted area indicating that only a vehicle satisfying a predetermined condition is allowed to pass. A route guidance method performed in an in-vehicle navigation device comprising: storage means for storing passability information indicating whether or not the host vehicle is allowed to pass through the restricted area,
Obtaining a destination via the information input means;
Determining whether the destination is located outside or inside the restricted area;
Determining whether or not the host vehicle is permitted to travel within the restricted area;
When it is determined that the host vehicle is not allowed to travel inside the restriction area, and the destination is determined to be located outside the restriction area, a route that does not enter the inside of the restriction area Searching for a route to a destination located outside;
When it is determined that the host vehicle is not allowed to travel inside the restricted area and the destination is located within the restricted area, the inside of the restricted area is used by a vehicle or a means other than the vehicle. And searching for a route to a destination located inside the restricted area;
Performing route guidance according to the searched route;
A route guidance method characterized by comprising: The step of searching for a route to a destination located inside the restricted area using means other than the vehicle,
Searching for a parking lot outside the restricted area that satisfies a predetermined condition;
Searching for a walking route from the parking lot to the destination;
The route guidance method according to claim 9, further comprising:   The predetermined condition is that a distance from the parking lot to the destination is a predetermined distance or less, or a time required for walking from the parking lot to the destination is a predetermined time or less. Item 15. A route guidance method according to Item 10. When a parking lot outside the restricted area that satisfies the predetermined condition is not searched,
Searching for public transport that is movable to the destination or near the destination;
Searching for a parking lot outside the restricted area to be used when using the public transportation;
The route guidance method according to claim 12, further comprising: In the step of searching for a route to the destination located inside the restricted area using the vehicle, the fact that the destination is located inside the restricted area is notified,
The route guidance method according to claim 9, wherein in the step of performing the route guidance, route guidance display outside the restricted area is performed, and route guidance display inside the restricted area is not performed. In the step of searching for a route to the destination located inside the restricted area using the vehicle, the fact that the destination is located inside the restricted area is notified,
In the step of performing the route guidance, a route guidance display outside the restriction area is performed, and a route guidance display inside the restriction area is displayed in a mode different from a route guidance display outside the restriction area. The route guidance method according to claim 9.   The route guidance method according to claim 9, wherein the restricted area is an environmental zone in which a vehicle satisfying a predetermined exhaust gas standard can pass.

Images