JP2014181932A - Facility search system, facility search method, and facility search program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a facility search system, a facility search method, and a facility search program, which improves user convenience by reducing a processing load required for a facility search in the case of search for and guiding a facility nearby a travel route.SOLUTION: A navigation device 1 for use in searching for a facility nearby a travel route set on a road includes: a map DB 7a for storing a map and information related to a facility; a facility search part 6a for searching for a facility within a search range centered around a link on a road on which a travel route is set, on the basis of the information stored in the map DB 7a; and a search range setup part 6b for setting a search range. If a road having a link is at least a given category of target road, the category including an expressway, the search range setup part 6b sets a search range on the basis of: presence of a travel route reaching a link of a road other than the target road branching from a link of the target road; or an attribute of a link of a road other than a target road branching from a link of the target road.

Description

  The present invention relates to a facility search system, a facility search method, and a facility search program.

  2. Description of the Related Art Conventionally, an in-vehicle navigation device that searches for and guides a travel route from the departure point of a vehicle to a destination, and has been proposed that searches for facilities around the travel route and provides guidance. In such an in-vehicle navigation device, when the vehicle is traveling on a highway, the next highway exit located ahead of the current position of the vehicle in the traveling direction is specified and within a predetermined distance from the highway exit. The facility that is located in the road, which is available when the vehicle gets off the highway from the highway to the general road through the highway exit, is used for guidance. If the vehicle passes through the expressway exit without getting off, the next expressway exit is identified, and a facility located within a predetermined distance from the expressway exit is searched for guidance. In addition, the search for the next highway exit and the search and guidance for facilities were repeated until the vehicle got off the highway via the highway exit (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2001-21376

  However, in the prior art described in Patent Document 1, the next highway exit located ahead of the current position of the vehicle is the highway exit on the travel route (that is, the vehicle gets off the highway). Because the facility search is performed based on a predetermined distance regardless of whether it is a highway exit that is scheduled to pass through for the purpose of processing load required for facility search. In addition, there is room for improvement from the viewpoint of convenience for vehicle drivers and passengers (hereinafter referred to as users).

  In other words, even if the next expressway exit is not an expressway exit on the travel route, the facility search is performed based on a predetermined uniform distance, so there is a possibility that it will actually be used. The user may be able to search for low-level facilities and provide guidance, and the processing load required for the facility search will increase carelessly, or facilities that are unlikely to be used will be guided to the convenience of the user. There was a problem that the sex declined instead.

  Or, conversely, even if the next expressway exit is an expressway exit on the travel route, the facility search was performed based on a uniform set distance, so it was actually used. Even if the facility has a high possibility of being lost, there is a problem that the user's convenience is lowered because the user may not be guided due to leakage from the search.

  The present invention has been made in view of the above, and it is possible to reduce the processing load required for facility search when searching for facilities around a travel route and performing guidance, or It is an object to provide a facility search system, a facility search method, and a facility search program that can improve convenience.

  In order to solve the above-described problems and achieve the object, the facility search system according to claim 1 is a facility search system for searching for facilities around a travel route set on a road, and relates to a map and a facility. Map information storage means for storing information, and a facility for searching for a facility within a search range centered on a link on the road on which the travel route is set based on the information stored in the map information storage means A search means, and a search range setting means for setting the search range. The search range setting means, when the road with the link is a predetermined type of target road including at least an expressway, Presence / absence of the travel route leading to a link of a road other than the target road that branches from the link of the road, or a road other than the target road that branches from the link of the target road Based on the attributes of the link, setting the search range.

  The facility search system according to claim 2 is the facility search system according to claim 1, wherein the search range setting means has a travel route to a link of a road other than the target road branched from the link of the target road. In some cases, a search range centered on an exit link that is a link of the target road is set as a search range wider than a search range centered on another link of the target road.

  The facility search system according to claim 3 is the facility search system according to claim 2, wherein the search range setting means is a case where the link of the target road is not the exit link, and the link of the target road If the link attribute of the road other than the target road that branches off from is an attribute indicating that it is a service area or a parking area, or an attribute indicating an interchange, the link of the target road is the center. The search range is set as a search range narrower than the search range centered on the exit link.

  The facility search system according to claim 4 is the facility search system according to claim 3, wherein the search range setting means is a case where the link of the target road is not the exit link, and the link of the target road If the link attribute of the road other than the target road that branches off from is an attribute indicating that it is a service area or a parking area, or an attribute indicating an interchange, the service area or the parking area, or The size of the interchange is specified based on the information stored in the map information storage means, and a search range centered on the link set on the target road is set based on the specified size.

  The facility search method according to claim 5 is a facility search method for searching for facilities around a travel route set on a road, and is stored in a map information storage means for storing information about a map and facilities. And a search range setting step of searching for a facility within a search range centered on a link on the road on which the travel route is set, and a search range setting step of setting the search range, the search range In the setting step, when the road with the link is a predetermined type of target road including at least an expressway, the travel route to the link of the road other than the target road branched from the link of the target road The search range is set based on the presence or absence or the attribute of a link of a road other than the target road that branches off from the link of the target road.

  A facility search program according to claim 6 is a facility search program for causing a computer to execute the facility search method according to claim 5.

  According to the facility search system according to claim 1, the facility search method according to claim 5, and the facility search program according to claim 6, when a road with a link is a target road, the target road The search range is set based on the presence or absence of a travel route that leads to a link of a road other than the target road that branches off from the link or the attribute of the link of a road other than the target road that branches from the link of the target road. So, for example, the search range is widened around the exit that travels when getting off the target road to another road, or the search range is narrowed around the exit that doesn't run when getting off the target road to other roads. Or, for links that lead to parking areas or interchanges, narrow the search range, etc. It can be adjusted in circumference, and to reduce the processing load required for the facility search, it is possible to improve user convenience.

  According to the facility search system of claim 2, when there is a travel route that reaches a link of a road other than the target road that branches off from the link of the target road, the search range is set as a relatively wide search range. Therefore, for facilities that are likely to be used by the user, such as facilities around exits that travel when getting off the target road to other roads, more facilities can be found by searching in a relatively wide search range. Since it can guide, it becomes possible to improve a user's convenience further.

  According to the facility search system according to claim 3, the link attribute of the road other than the target road branched from the link of the target road is an attribute indicating that it is a service area or a parking area, or an interchange. If the attribute is shown, the search range is set as a relatively narrow search range, so for facilities that are not very likely to be used by the user, such as a service area or a parking area or a facility around an interchange By performing a search in a relatively narrow search range, the processing load required for the search can be reduced, and the convenience of the user can be further improved by reducing the number of facilities that are unlikely to be used. It becomes possible.

  According to the facility search system of the fourth aspect, the search range is set based on the size of the service area or the parking area or the interchange. For example, in the case of a large service area or parking area, it is relatively wide. By searching in the search range, you can guide the facility without omission, or in the case of a small service area or parking area, search in a relatively narrow search range to reduce the processing load required for the search This makes it possible to further improve the convenience of the user and the efficiency of the search process.

1 is a block diagram illustrating a navigation device as a facility search system according to Embodiment 1 of the present invention. 3 is a flowchart of a facility search process according to the first embodiment. It is a flowchart of the facility search process following FIG. It is a figure which shows notionally the driving | running route in which a facility search is performed. 10 is a flowchart of facility search processing according to the second embodiment. It is a flowchart of the facility search process following FIG.

  Hereinafter, embodiments of a facility search system, a facility search method, and a facility search program according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to each embodiment.

[Concepts common to each embodiment]
First, a concept common to the embodiments will be described. The facility search system according to each embodiment is a system for searching for facilities around a travel route set on a road. Here, the “travel route set on the road” is a travel route searched for from the departure point to the destination. Hereinafter, the road on which the travel route is set is referred to as “travel route setting road” as necessary. In addition, the “facility around the driving route” is a facility provided around the driving route, and the specific type thereof is arbitrary. For example, public facilities (government offices, libraries), commercial facilities ( A facility such as a theme park, a shopping mall, a gas station, a convenience store, a restaurant, etc., which is recorded as POI (Point Of Interest) in the facility search system. Note that “periphery” means within a search range centered on a link on a travel route setting road, which will be described later.

  Such a facility search system can be constituted by, for example, a plurality of devices (a center server and a terminal device connected so as to be communicable with each other), but can also be constituted by a single device. The facility search system can be configured as a system dedicated to facility search, but can also be configured as a system having functions other than facility search. In the following, a case where the facility search system is configured as a single device and is configured as a system having functions other than the facility search will be described. A case will be described in which a navigation device having a function of guiding a travel route from a ground to a destination is configured as a navigation device for searching for facilities around a travel route set on a road. The navigation device is not limited to the in-vehicle navigation device fixedly mounted on the vehicle, and may be a device configured by installing a navigation application on a mobile terminal device such as a smartphone. The “vehicle” is not limited to a four-wheeled vehicle, and includes any vehicle (for example, a two-wheeled vehicle) that can travel on a target road described later.

[Embodiment 1]
Next, the first embodiment will be described. This form is a form in which a facility is searched by setting a search range based on the current position as the current position of the vehicle moves.

(Configuration-navigation device)
First, the configuration of the navigation device according to the first embodiment will be described. FIG. 1 is a block diagram illustrating a navigation device as a facility search system according to this embodiment. The navigation device 1 includes a current location acquisition unit 2, a touch panel 3, a display 4, a speaker 5, a control unit 6, and a data recording unit 7.

(Configuration-Navigation device-Current location acquisition unit)
The current location acquisition unit 2 is current location acquisition means for acquiring the current location of a vehicle in which the navigation device 1 is mounted or a vehicle that has been brought in (hereinafter, the host vehicle). Specifically, the current location acquisition unit 2 includes at least one of a GPS receiver, a geomagnetic sensor, a distance sensor, and a direction sensor (all of which are not shown) such as a gyro sensor, and the current position of the host vehicle (coordinates) ) And orientation are detected by a known method.

(Configuration-Navigation device-Touch panel)
The touch panel 3 is an operation unit that receives an operation input by a user. The touch panel 3 is disposed on the front surface of the display 4. However, in place of the touch panel 3, a known operation means such as a remote operation means such as a remote controller or a hard switch can be used.

(Configuration-Navigation device-Display)
The display 4 is display means for displaying various images based on the control of the control unit 6. As the display 4, for example, a known flat panel display such as a liquid crystal display or an organic EL display can be used.

(Configuration-Navigation device-Speaker)
The speaker 5 is output means for outputting various sounds based on the control of the control unit 6. The specific form of the sound output from the speaker 5 is arbitrary, and it is possible to output a synthesized sound generated as necessary and a sound recorded in advance.

(Configuration-Navigation device-Control unit)
The control unit 6 is a control unit that controls the navigation apparatus 1. Specifically, the CPU, various programs that are interpreted and executed on the CPU (basic control programs such as an OS, and specific functions that are activated on the OS) And an internal memory such as a RAM for storing the program and various data. In particular, the facility search program according to the present embodiment is substantially installed in the navigation device 1 via an arbitrary recording medium or network, thereby substantially configuring each unit of the control unit 6.

  The control unit 6 includes a facility search unit 6a, a search range setting unit 6b, and a guide unit 6c in terms of functional concept. The facility search unit 6a is a facility search means for searching for a facility within a search range centered on a link on a travel route setting road based on information stored in a map DB 7a described later. The search range setting unit 6b is search range setting means for setting a search range. When the road with the link is the target road, the search range setting unit 6b determines whether there is a travel route that leads to a link of a road other than the target road that branches from the link of the target road, A search range is set based on the link attribute of a road other than the target road branched from the link. Here, the “target road” means a predetermined type of road including at least an expressway. This “predetermined type of road” can be arbitrarily set. For example, since there are relatively few roads that intersect the road, the vehicle can travel from the road to another road. There are relatively few roads, and examples of such roads include motorway roads other than expressways, bypass roads, and national roads (formerly first-class national roads) with single or double-digit national road numbers. Can do. “Roads other than target roads” means all roads that do not fall under “predetermined types of roads including at least expressways” set as target roads as described above. For example, so-called “general roads” To do. The guidance unit 6c is a guidance unit that provides guidance to the user regarding the facility searched by the facility search unit 6a. Details of processing executed by each component of the control unit 6 will be described later.

(Configuration-Navigation device-Data recording unit)
The data recording unit 7 is a recording unit that records a program and various data necessary for the operation of the navigation device 1, and is configured using, for example, a hard disk (not shown) as an external recording device. However, any other recording medium including a magnetic recording medium such as a magnetic disk or an optical recording medium such as a DVD or a Blu-ray disc can be used instead of or together with the hard disk (a facility search server described later) The same applies to the data recording unit 7). The data recording unit 7 includes a map database (hereinafter, the database is referred to as “DB”) 7a.

  The map DB 7a is map information storage means for storing information about the map (hereinafter referred to as map information). Here, “map information” is information necessary for specifying various positions including roads, road structures, facilities, and the like. For example, node data (node numbers, coordinates, etc.) relating to each node set on the road. ) And link data (link ID, link name, connection node number, link coordinates, link attribute) related to each link set on the road. Here, the “link attribute” is an attribute of a link, for example, an attribute indicating that the road on which the link is set is a link in a service area or a parking area (hereinafter referred to as SA / PA). The attribute indicating that the road on which the link is set is an interchange (hereinafter referred to as IC) is applicable. Further, in addition to these pieces of information, the map information includes information related to facilities. The information regarding the facility includes, for example, the size of the SA / PA and the size of the IC in addition to the location of each facility, the type of each facility, the name of each facility, and the icon image of each facility. The map information configured in this way is arbitrarily determined by the administrator of the facility search system and stored in advance in the map DB 7a.

(processing)
Next, the facility search process executed by the navigation device 1 configured as described above will be described. 2 and 3 are flowcharts of the facility search process, and FIG. 4 is a diagram conceptually showing a travel route in which the facility search is performed. This process is a process for searching for facilities in the vicinity of the travel route set on the road, and is activated when a facility search is instructed by the user after the navigation apparatus 1 is powered on. More specifically, for example, when a destination is set and a route search is instructed by an operation through the touch panel 3 by the user, the current location of the host vehicle acquired by the current location acquisition unit 2 is set as a departure location, A travel route from the starting point to the destination is searched by the control unit 6 by a known searching method such as the Dijkstra method. And if the facility search with respect to this driving | running route is instruct | indicated by operation via the touch panel 3 by a user, a facility search process will be started. In the following, as shown in FIG. 4, as a travel route, a road other than the target road illustrated at the bottom enters the target road, and from the exit illustrated at the top, other than the target road illustrated at the top. A case where a route to get to the road is searched will be described. In the following, it is assumed that a step that is not specified among the steps is executed by the control unit 6 of the navigation device 1. In the following description of each process, the step is abbreviated as “S”.

  First, as shown in FIG. 2, the search range setting unit 6b of the navigation device 1 determines whether or not the search center link is the target road link (SA1). Here, the search center link is a link that becomes the center of the search range when the facility search by the facility search unit 6a is performed, for example, a link on a road (hereinafter referred to as a travel road) on which the host vehicle is traveling. In this case, the link is forward in the traveling direction by a predetermined distance (for example, 100 m) with respect to the current location of the host vehicle. The “target road link” is a link on the target road. For example, the search range setting unit 6b specifies the search center link by referring to the map information stored in the map DB 7a based on the current location of the host vehicle acquired by the current location acquisition unit 2, and the specified search The link attribute of the central link is specified, and it is determined whether or not the specified link attribute is an attribute of the target road. If the attribute is the attribute of the target road, it is determined that the search center link is the target road link. If the attribute is not the attribute of the target road, it is determined that the search center link is not the target road link.

  If it is determined that the search center link is not the target road link (SA1, No), it is not necessary to perform a special facility search for the target road, and a general facility search may be performed, as shown in FIG. The search range setting unit 6b sets the search range as a general range (SA2). Here, the “general range” is a default search range. Although the specific range of this general use range is arbitrary, since the possibility that the traveling road is a general road is high and facilities around the general road are likely to be used by the user of the own vehicle, at least, It is preferable to set a range wider than the SA / PA range and the IC entrance narrow range described later. For example, as shown in FIG. 4, the general-purpose range is a range set on both sides of the traveling road with the search center link interposed therebetween, and is a range parallel to the traveling road. Is set as a range within a predetermined distance (for example, within 1 km).

  Next, the facility search unit 6a searches for a facility within the search range centered on the search center link as shown in FIG. 2 (SA3). Specifically, the facility search unit 6a searches by referring to the map information stored in the map DB 7a based on the search center link specified in SA1 and the search range set at that time. A facility existing within the search range centering on the central link is identified. However, this facility search itself can be performed by a known method (the same applies to the facility search by the facility search unit 6a described below).

  Then, the guide unit 6c guides the searched facility (SA4). Although the specific method of this guidance is arbitrary, for example, the guidance part 6c acquires the position of each facility searched in SA3, the type of each facility, the name of each facility, and the icon image of each facility from the map DB 7a. Then, based on the acquired information, the facility icon image is superimposed on the map around the current location displayed on the display 4, or the type and name list of each facility is displayed on the display 4. To do. However, this facility guidance itself can be performed by a publicly known method (the same applies to facility guidance by the following guidance unit 6c).

  Thereafter, the control unit 6 determines whether or not the host vehicle has arrived at the destination (SA5). Specifically, it is determined whether or not the current location of the host vehicle acquired by the current location acquisition unit 2 is within a predetermined range (for example, within 10 m) with respect to the destination. If the vehicle has not arrived, it is determined that the host vehicle has not arrived at the destination. And when it determines with the own vehicle not having arrived at the destination (SA5, No), it returns to SA1. In the same manner, by repeating SA1 to SA5 until it is determined that the search center link is the target road link or it is determined that the destination has arrived at the destination, the current location of the host vehicle changes. Search and guide the facility based on the range.

  Thereafter, when the host vehicle travels on the target road (for example, when entering a highway from a general road), the search center link is determined to be the target road link in SA1 (SA1, Yes). In this case, the search range setting unit 6b determines whether or not the next branch link is an exit link (SA6). Here, the “next branch link” is a link branched from the target road link determined to be the search center link in SA1. As this next branch link, for example, a link for exiting from the target road to a road other than the target road (hereinafter referred to as an exit link), a link for entering SA / PA from the target road (hereinafter referred to as an SA / PA link). ) Or a link for entering an IC to which the target road is connected (hereinafter referred to as an IC link). For this determination, for example, with reference to the map information stored in the map DB 7a, a link existing ahead in the traveling direction of the host vehicle is closer to the current location of the host vehicle than the target road link determined to be the search center link. In order, the presence or absence of a link branching from the identified link is sequentially identified. When it is first identified that a branching branch exists, the branching link is identified as the next branch link. Then, the attribute of the next branch link is specified, and it is determined by determining whether the attribute of the specified next branch link corresponds to any of the exit link, the SA / PA link, or the IC link.

  And when it determines with the next branch link being an exit link (SA6, Yes), the search range setting part 6b is a link for the said next branch link to go down to roads other than a target road. Whether or not (SA7). That is, the search range setting unit 6b determines whether or not there is a travel route that reaches a link of a road other than the target road that branches off from the link of the target road. This determination is performed by, for example, referring to map information stored in the map DB 7a, specifying an attribute of the next branch link, and based on the attribute of the specified next branch link, the branch link is a road other than the target road. It is determined whether it is a link. In addition, it is determined whether or not the next branch link is a link on a travel route set to reach the destination from the departure point. If the branch link is a link of a road other than the target road and a link on the travel route, it is determined that the next branch link is a link for getting down to a road other than the target road, and the branch If the link is not a link of a road other than the target road or is not a link on the travel route, it is determined that the next branch link is not a link for descending to a road other than the target road.

  And when it determines with the next branch link being a link for getting down to roads other than a target road (SA7, Yes), the search range setting part 6b sets a search range to the range for driving exits (SA8). Here, the “traveling exit range” is a range in which a search is made for facilities around the exit where the host vehicle travels to get off the target road from the target road. The specific range of the travel exit range is arbitrary, but it is highly possible that the host vehicle gets off the road other than the target road and the user is likely to use the surrounding facilities. It is preferable to set a range (for example, 1 Km) wider than a search range centered on another link (for example, a range for passing exit, a range for SA / PA, and a narrow range for IC entrance described later).

  On the other hand, when it is determined in SA7 that the next branch link is not a link for descending to a road other than the target road (SA7, No), the search range setting unit 6b sets the search range as a passing exit range ( SA9). Here, the “passage exit range” is a range in which the host vehicle searches for a peripheral facility around an exit that simply passes through the target road without getting off the road other than the target road. Although the specific range of this range for passing exits is arbitrary, at least the range for traveling exits because it is unlikely that the host vehicle will get off roads other than the target road and the user is unlikely to use surrounding facilities. A narrower range (for example, 500 m) is set.

  If it is determined in SA6 that the next branch link is not an exit link (SA6, No), as shown in FIG. 3, the search range setting unit 6b determines whether the next branch link is an SA / PA link. It is determined whether or not (SA10). This determination is performed in the same manner as SA6, for example. When it is determined that the next branch link is the SA / PA link (SA10, Yes), the search range setting unit 6b refers to the map information stored in the map DB 7a and is the SA / PA link. The SA / PA size in which the next branch link determined to be set is acquired (SA11), the SA / PA range is determined based on the acquired SA / PA size, and the search range is determined. The determined SA / PA range is set (SA12). Here, the “range for SA / PA” is a range in which a peripheral facility at the entrance of the SA / PA where the host vehicle may enter from the target road is searched. The specific range of the SA / PA range is arbitrary, but the vehicle may enter SA / PA, and the user may use facilities around SA / PA. While it is preferable to make the range wider than the exit range, it is considered that the possibility of using the facility is lower than when the host vehicle gets off the road other than the target road. (For example, 700 m) is preferable. That is, the SA / PA range is preferably a range between the traveling exit range and the passing exit range.

At this time, as the SA / PA range, the same range may be set uniformly for all SA / PAs, but in the present embodiment, it is determined according to the size of SA / PA. As a result, there is a problem that a search omission occurs when a relatively large scale SA / PA is searched in a relatively narrow range, or a relatively wide range is searched for a relatively small SA / PA. In this case, it is possible to reduce a problem that the processing load increases carelessly. The criteria for determining the size of the SA / PA is arbitrary, but can be determined based on the area of the SA / PA, for example, when the area of the SA / PA is less than 500 m ² , the SA / PA When the use range is 600 m and the SA / PA area is 500 m ² or more, the SA / PA use range is 800 m. Alternatively, the area of SA / PA may be set to a range for SA / PA.

  On the other hand, if it is determined in SA10 that the next branch link is not an SA / PA link (SA10, No), the search range setting unit 6b specifies that the next branch link is an IC link (SA13). Then, the search range setting unit 6b refers to the map information stored in the map DB 7a, and acquires the size of the IC in which the next branch link identified as the IC link is set (SA14). Then, the IC range is determined based on the acquired IC size, and the search range is set to the determined IC range (SA15). Here, the “IC range” is a range in which a peripheral facility of the IC where the own vehicle may enter from the target road is searched. The specific range of the IC range is arbitrary, but the vehicle may enter the IC, and the user may use surrounding facilities. On the other hand, since it is considered that the possibility of using the facility is low compared with the case where the host vehicle gets off the road other than the target road, it is set to a range (for example, 700 m) narrower than the range for traveling exit. Is preferred. That is, the IC range is preferably a range between the travel exit range and the pass exit range.

  At this time, as the IC range, the same range may be set uniformly for all the ICs, but in the present embodiment, it is determined according to the size of the IC. As a result, there is a problem that a search omission occurs when a relatively large-scale IC is searched in a relatively narrow range, or when a relatively small-scale IC is searched in a relatively wide range. It is possible to reduce a problem that the load is increased carelessly. The criterion for determining the size of the IC is arbitrary, but for example, it can be determined based on the total number of lanes of all roads constituting the IC, and when this total number is less than 10 lanes, IC range = 600 m, and if it is 10 lanes or more, IC range = 800 m. In FIG. 4, the IC is omitted.

  After the search range is set in SA8, SA9, SA12, or SA15 in this way, as shown in FIG. 2, the facility search unit 6a is within the search range centered on the next branch link as shown above. The facility 6c guides the found facility (SA4). Thereafter, the control unit 6 determines whether or not the host vehicle has arrived at the destination (SA5), and when it is determined that the host vehicle has not arrived at the destination (SA5, No), returns to SA1. . Similarly, SA1 to SA15 are repeated until it is determined that the host vehicle has arrived at the destination, thereby guiding a new facility searched based on the search range as the current location of the host vehicle changes. And when it determines with the own vehicle having arrived at the destination (SA5, Yes), a facility search process is complete | finished.

(Effect of Embodiment 1)
As described above, according to the present embodiment, when a road with a link is a target road, the presence / absence of a travel route leading to a link of a road other than the target road branched from the link of the target road, or Since the search range is set based on the attribute of the link of the road other than the target road that branches from the link of the target road, for example, the search range is widened around the exit that passes when getting off the target road to another road. The search range can be adjusted based on the driving route and its surrounding environment, such as narrowing the search range for links to SA / PA or IC, and reducing the processing load required for facility search In addition, user convenience can be improved.

  In addition, when there is a travel route that leads to a link of a road other than the target road that branches off from the link of the target road, the search range is set as a relatively wide search range. For facilities that are likely to be used by the user, such as facilities around exits that pass through, it is possible to guide more facilities by searching in a relatively wide search range. Can be further improved.

  In addition, when the attribute of a link of a road other than the target road that branches off from the link of the target road is an attribute indicating SA / PA or an attribute indicating IC, the search range is relatively long. Since it is set as a narrow search range, facilities that are not likely to be used by the user, such as facilities in the vicinity of SA / PA or IC, can be searched by performing a search in a relatively narrow search range. The processing load required can be reduced, and the convenience for the user can be further improved by reducing the number of facilities that are unlikely to be used.

  In addition, since the search range is set based on the size of the SA / PA or IC, for example, in the case of a large SA / PA, the facility is guided without omission by performing a search in a relatively wide search range. In the case of a small SA / PA, it is possible to reduce the processing load required for the search by performing a search in a relatively narrow search range. Can be further promoted.

[Embodiment 2]
Next, a second embodiment will be described. In this mode, before the current position of the vehicle moves, the search range is set based on each position on the travel route and the facilities are searched, so that all the searched facilities are guided in advance before the departure of the vehicle. It is a form to do. The configuration and processing of the second embodiment are substantially the same as those of the first embodiment except where otherwise specified, and the configuration substantially the same as the configuration of the first embodiment is the same as that used in the first embodiment. The same reference numerals and / or names are assigned as necessary, and the description thereof is omitted.

(processing)
In the present embodiment, the facility search process is executed by the navigation device 1 configured in the same manner as in the first embodiment. 5 and 6 are flowcharts of this facility search process. However, SB2 to SB4 and SB6 to SB15 in FIGS. 5 and 6 are the same as SA1 to SA3 and SA6 to SA15 in FIGS.

  First, as shown in FIG. 5, the search range setting unit 6b of the navigation device 1 sets the link closest to the departure place among the unsearched links of the travel route as the search center link (SB1). . For example, when SB1 is executed for the first time, since all links in the travel route are unsearched links, the departure link is set as the search center link. Then, SB2 to SB4 and SB6 to SB15 of FIGS. 5 and 6 are executed based on the search center link set in this way.

  Then, after searching for a facility in the search range centered on the search center link in SB4 of FIG. 5 (SB4), the search range setting unit 6b reaches from the departure point to the destination in the link of the travel route. It is determined whether or not the search has been completed for all of the links (SB5). If the search is not completed (SB5, No), the process returns to SB1, and among the unsearched links of the travel route, the link closest to the departure place is set as the search center link (SB1). . For example, when SB1 is executed for the second time, the link next to the departure link is set as the search center link. In the same manner, the links from the starting point to the destination are sequentially selected in order of the distance from the starting point, and the selected link is set as the search center link each time the selection is made. Then, the setting of the search range and the search for the facility within the search range are repeated.

  And when it determines with the search having been completed about all the links from a departure place to the destination in the link of a driving | running route (SB5, Yes), the guidance part 6c will search all the links searched so far. The facility is guided (SB16), and the facility search process is terminated. Although the specific method of this guidance is arbitrary, for example, the guidance unit 6c obtains the location, type, name, and icon image from the map DB 7a for each of the facilities searched so far, and obtains the information. Based on the information, the icon images of all facilities are superimposed on the map around the current location displayed on the display 4, or the list of types and names of all facilities is displayed on the display 4. Or

(Effect of Embodiment 2)
As described above, according to the present embodiment, in addition to the same effects as in the first embodiment, the user can receive guidance for all facilities before departure. Planning and the like can be performed in advance, which further improves user convenience.

[Modifications to Embodiment]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention are arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. be able to. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above contents, and may vary depending on the implementation environment and details of the configuration of the invention. May be solved, or only some of the effects described above may be achieved. For example, even when the processing load required for facility search cannot be reduced as compared with the conventional case, the problem of the present invention is solved when the facility search can be achieved by a technique different from the conventional one.

(About distribution and integration)
Further, each of the electrical components described above is functionally conceptual and does not necessarily need to be physically configured as illustrated. In other words, the specific forms of distribution and integration of each unit are not limited to those shown in the drawings, and all or a part thereof may be functionally or physically distributed or integrated in arbitrary units according to various loads or usage conditions. Can be configured. For example, the facility search system may be configured by a plurality of devices connected to be able to communicate with each other by wire or wirelessly.

(About search range)
In each of the above embodiments, the traveling exit range is set to the widest search range among the traveling exit range, the passing exit range, the SA / PA range, and the IC range, and the SA / PA range is set. In addition, the IC range is set to the next wide search range, and the passing exit range is set to the narrowest search range. However, the present invention is not limited to this.

  For example, when the exit where the host vehicle is scheduled to descend from the target road to a road other than the target road is an exit frequently used by the user, the user already knows the facilities around the exit. The search range around this exit (that is, the travel exit range) may be set to a range narrower than other search ranges. For this reason, the history information for identifying the branch link of the exit where the host vehicle has traveled in the past is recorded in the data recording unit 7, and the search range setting unit 6 b determines the past travel of the exit based on this history information. When the number of times of travel is specified and the number of times of travel is equal to or greater than a predetermined number of times, the travel exit range may be set to a range narrower than other search ranges. Similarly, the passing exit range, SA / PA range, and IC range are set based on the number of times that the vehicle has passed through the exit in the past, the number of times that the SA / PA has been used, and the number of times that the IC has traveled. May be. By setting the search range in consideration of the travel history in this way, the search range can be optimized for each user.

  In each of the above embodiments, the SA / PA range is set based on the SA / PA size, and the IC range is set based on the IC size. For exit ranges, for example, the size of each exit (total number of lanes leading to each exit, area of the municipality where each exit is located, etc.) is specified based on the map information stored in the map DB 7a. The search range may be set based on this size. Thus, by setting the search range in consideration of the size of each exit, the search range can be optimized for each exit.

  The “narrow search range” includes making the search range zero. That is, the facility search may be omitted by setting the search range to zero for all or part of the range for traveling exit, range for passing exit, range for SA / PA, or range for IC. In this case, the processing load can be further reduced.

DESCRIPTION OF SYMBOLS 1 Navigation apparatus 2 Present location acquisition part 3 Touch panel 4 Display 5 Speaker 6 Control part 6a Facility search part 6b Search range setting part 6c Guide part 7 Data recording part 7a Map DB

Claims (6)

A facility search system for searching facilities around a driving route set on a road,
Map information storage means for storing information about the map and facilities;
Based on the information stored in the map information storage means, facility search means for searching for facilities within a search range centered on a link on the road on which the travel route is set;
Search range setting means for setting the search range,
The search range setting means, when the road with the link is a predetermined type of target road including at least an expressway, the traveling to the link of a road other than the target road branched from the link of the target road The search range is set based on the presence or absence of a route or the attribute of a link of a road other than the target road branched from the link of the target road.
Facility search system. The search range setting means, when there is a travel route that leads to a link of a road other than the target road that branches from the link of the target road, a search range centered on an exit link that is a link of the target road, Set as a search range wider than the search range centered on other links of the target road,
The facility search system according to claim 1. The search range setting means is a case where the link of the target road is not the exit link, and the attribute of the link of the road other than the target road branched from the link of the target road is a service area or a parking area If it is an attribute indicating that it is an attribute indicating that it is an interchange, the search range centered on the link of the target road is set as a search range narrower than the search range centered on the exit link,
The facility search system according to claim 2. The search range setting means is a case where the link of the target road is not the exit link, and an attribute of a link of a road other than the target road branched from the link of the target road is a service area or a parking area If it is an attribute indicating that it is an attribute indicating that it is an interchange, the service area or the parking area or the size of the interchange is specified based on the information stored in the map information storage means. Based on the specified size, set a search range centered on the link set on the target road,
The facility search system according to claim 3. A facility search method for searching for facilities around a driving route set on a road,
A facility search step of searching for a facility within a search range centered on a link on a road on which the travel route is set based on information stored in a map information storage means for storing information on the map and the facility; ,
A search range setting step for setting the search range,
In the search range setting step, when the road with the link is a predetermined type of target road including at least an expressway, the link reaching a link of a road other than the target road that branches off from the link of the target road The search range is set based on the presence or absence of a travel route or the attribute of a link of a road other than the target road that branches off from the link of the target road.
Facility search method. A facility search program for causing a computer to execute the facility search method according to claim 5.

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