JP2018059882A - Re-retrieval system, and re-retrieval program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a re-retrieval system and re-retrieval program that, upon re-retrieval, can prevent drivers from travelling a non-prioritized guidance road such as a narrow street road not suitable for travelling, for example, the non-prioritized guidance road including a road where vehicles are hard to travel, a risky road with a little traffic of the vehicle, or the like.SOLUTION: A re-retrieval system is the re-retrieval system that re-retrieves a travelling route of a retrieval object vehicle, and the re-retrieval system comprises: an initial retrieval unit 7a that retrieves the travelling route of the retrieval object vehicle passing only a priority guide road; a travelling history DB 8b that stores a travelling history of a collection object vehicle; a determination unit 7c that determines whether a re-retrieval timing of the travelling route of the retrieval object vehicle arrives; and a re-retrieval unit 7d that, when it is determined in the determination unit 7c that the re-retrieval timing arrives, re-retrieves the travelling route of the retrieval object vehicle on the basis of the travelling history stored in the travelling history DB 8b, and including the travelling history of a non-priority guide road by the collection object vehicle.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a re-search system and a re-search program.

  Conventionally, in a system for searching for a travel route, a travel route that passes only through a main road that allows safe passage of the vehicle has been searched. However, in fact, even if it is a narrow street where it is not confirmed that the vehicle can be safely passed, a narrow street where vehicles such as a narrow street where vehicles are actually traveling frequently can safely pass was there. Therefore, a system for searching for a route passing through a narrow street using a travel history of the narrow street by a collection target vehicle has been proposed (for example, see Patent Document 1).

JP 2004-61429 A

  Here, the technique described in Patent Document 1 is to search for a route passing through a narrow street at the time of initial search, and similarly to search for a route passing through a narrow street at the time of re-searching. However, searching for a route through a narrow street at any time in this way may be inconvenient for users who do not want to experience the narrow street that is difficult to travel compared to the main street. . Therefore, there has been a demand for a system that can prevent the convenience of the user from being lowered due to the guidance of the narrow street until the time when the search for the narrow street is not necessarily required.

  The present invention has been made in view of the above, and it is convenient for the user to search for a non-priority guide road at a timing when a search for a non-priority guide road such as a narrow street is not necessarily required. It is an object of the present invention to provide a re-search system and a re-search program that can prevent a decrease in image quality.

  In order to solve the above-described problems and achieve the object, a re-search system according to the present invention is a re-search system that re-searches a travel route of a search target vehicle, and the search target vehicle passes only through a priority guide road. Search means for searching for the travel route, travel history storage means for storing the travel history of the collection target vehicle, determination means for determining whether or not a re-search timing of the travel route of the search target vehicle has arrived, When the determination means determines that the re-search timing has arrived, based on the travel history stored in the storage means storage means, including the travel history of the non-priority guide road by the collection target vehicle, Re-search means for re-searching the travel route of the search target vehicle.

  Further, the re-search program according to the present invention is a re-search program for re-searching the travel route of the search target vehicle, wherein the computer searches the travel route of the search target vehicle that passes only the priority guide road, A travel history storage unit that stores a travel history of the collection target vehicle, a determination unit that determines whether or not a re-search timing of a travel route of the search target vehicle has arrived, and a re-search timing has arrived in the determination unit The travel route of the search target vehicle is re-established based on the travel history stored in the storage means storage means and including the travel history of the non-priority guide road by the collection target vehicle. It functions as re-search means for searching.

  According to the re-search system and the re-search program according to the present invention, when the re-search timing arrives, the travel route is re-searched based on the travel history including the travel history of the non-priority guide road by the collection target vehicle. Further, it is possible to prevent the convenience of the user from being lowered due to the search for the non-priority guide roads to the timing when the search for the non-priority guide roads is not necessarily required as in the initial search.

It is a block diagram which illustrates the re-search system concerning an embodiment of the invention. It is a figure which shows an example of the driving | running route of a search object vehicle. It is a flowchart of an initial search post-process. It is a flowchart of a determination process. It is a flowchart of a re-search process.

(Embodiment)
Embodiments of a re-search system and a re-search program according to the present invention will be described below in detail with reference to the drawings. However, the present invention is not limited to the embodiments.

[Basic concept of the embodiment]
First, the basic concept of this embodiment will be described.

  The re-search system according to the present invention is a system for re-searching a travel route of a vehicle. Here, the “vehicle” is a concept including, for example, a four-wheeled vehicle, a two-wheeled vehicle, a bicycle, and the like. Hereinafter, a case where the vehicle is a four-wheeled vehicle will be described. The vehicles of the present invention generally include a collection target vehicle and a search target vehicle. The “collection target vehicle” is a vehicle for collecting travel histories and has a concept including a known probe car, for example. The “search target vehicle” is a concept that includes a vehicle that is a target for re-searching a travel route and that is instructed by the driver to re-search for the travel route. Further, “re-search” refers to searching for a travel route once after searching for a travel route (hereinafter referred to as initial search). The re-search result includes extracting the same travel route as the travel route extracted by the initial search (hereinafter referred to as the initial search route) or extracting a travel route different from the initial search route. Examples of the timing for performing such re-search (hereinafter referred to as re-search timing) include, for example, the timing when the driver gives an instruction for re-searching the travel route, the timing when the search target vehicle travels off the initial search route, Including the timing when the traffic jam occurs in the initial search route.

  Here, the road according to the present embodiment includes two types of roads: a priority guide road and a non-priority guide road. The “priority guide road” is a road that preferentially guides the vehicle to be searched during the initial search, and is a main road having a road width of 5 m or more, for example. The “non-priority guide road” is a road that is not preferentially guided to the search target vehicle during the initial search, and is a narrow street having a road width of less than 5 m, for example.

[Specific contents of the embodiment]
Next, specific contents of the present embodiment will be described.

(Constitution)
First, the configuration of the re-search system according to the present embodiment will be described. FIG. 1 is a block diagram illustrating a re-search system according to this embodiment. Here, the re-search system includes a plurality of in-vehicle devices 1 and a center device 10.

(Configuration-In-vehicle device)
First, the in-vehicle device 1 according to the present embodiment will be described. The in-vehicle device 1 is a device mounted on a vehicle, and specifically has a concept including an in-vehicle navigation device and the like. Here, the in-vehicle device 1 generally includes a touch pad 2, a display 3, a speaker 4, a current position detection unit 5, a communication unit 6, a control unit 7, and a data recording unit 8.

(Configuration-In-vehicle device-Touchpad)
The touch pad 2 is an operation unit that receives various operation inputs from the user when pressed by a user's finger or the like. Although the specific configuration of the touch pad 2 is arbitrary, for example, a publicly known one provided with an operation position detecting means by a resistance film method or a capacitance method can be used.

(Configuration-In-vehicle device-Display)
The display 3 is display means for displaying various images. Although the specific configuration of the display 3 is arbitrary, for example, a known flat panel display such as a liquid crystal display or an organic EL display can be used. Note that the touch pad 2 and the display 3 may be integrally formed as a touch panel.

(Configuration-In-vehicle device-Speaker)
The speaker 4 is sound output means for outputting information by sound. The specific form of the sound output from the speaker 4 is arbitrary, and it is possible to output a synthesized sound generated as necessary and a sound recorded in advance.

(Configuration-On-vehicle device-Current position detector)
The current position detection unit 5 is a current position detection unit that detects the current position of the in-vehicle device 1. The current position detection unit 5 includes a GPS, a gyro sensor, and a distance sensor (all of which are not shown), and detects the current position (coordinates), direction, and the like of the in-vehicle device 1 by a known method.

(Configuration-In-vehicle device-Communication unit)
The communication unit 6 is a communication unit that performs communication with the center apparatus 10 via a network. The specific type and configuration of the communication means are arbitrary. For example, a known mobile wireless communication means or a known VICS (registered trademark) system wireless communication means via FM multiplex broadcasting or beacon is used. be able to.

(Configuration-In-vehicle device-Control unit)
The control unit 7 is a control unit that controls the in-vehicle device 1, and specifically, a CPU, various programs interpreted and executed on the CPU (basic control programs such as an OS, and a specific function that is activated on the OS. And an internal memory such as a RAM for storing the program and various data. In particular, the re-search program according to the embodiment substantially configures each unit of the control unit 7 by being installed in the in-vehicle device 1 via an arbitrary recording medium or network.

  The control unit 7 includes an initial search unit 7a and an initial search post-processing unit 7b in terms of functions. The initial search unit 7a is search means for searching for a travel route of a search target vehicle that passes only through the priority guide road. The initial search post-processing unit 7b is a post-search processing unit that executes various processes after the search is performed by the initial search unit 7a, and includes a determination unit 7c and a re-search unit 7d. The determination unit 7c is a determination unit that determines whether or not the re-search timing of the travel route of the search target vehicle has arrived. When the determination unit 7c determines that the re-search timing has arrived, the re-search unit 7d is a travel history stored in the travel history DB 8b (described later), and the travel history of the non-priority guide road by the collection target vehicle Is a re-search means for re-searching the travel route of the vehicle to be searched based on the travel history including.

(Configuration-On-vehicle device-Data recording unit)
The data recording unit 8 is a recording unit that records a program and various data necessary for the operation of the in-vehicle 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 disk can be used instead of or together with the hard disk.

  The data recording unit 8 includes a map database (hereinafter referred to as DB) 8a and a travel history DB 8b.

  The map DB 8a is map information storage means for storing map information. Here, the “map information” is information for presenting a map to the user, and specifically, is necessary for specifying various positions including roads, road intersections, road structures, facilities, etc. For example, node data related to each node set on the road (for example, node ID, coordinates, etc.), link data related to each link set on the road (for example, link ID (hereinafter referred to as LID), link Name, connection node ID, road coordinates, road type (for example, narrow streets, general roads, major national roads, and expressways), road width, number of lanes, etc.), feature data (for example, traffic lights, road signs, guardrails, facilities) , Facility category, etc.), terrain data, etc. Such map information in the map DB 8a is recorded by inputting via a predetermined recording medium, or recorded by receiving information distributed from a map distribution center (not shown).

  The travel history DB 8b is a travel history storage unit that stores the travel history of the collection target vehicle. Here, the information (travel history) stored in the travel history DB 8b is arbitrary, but in the present embodiment, for example, information corresponding to the item “vehicle ID” and information corresponding to the item “collection time” The information corresponding to the item “travel route” is stored in association with each other. Here, the information corresponding to the item “vehicle ID” is vehicle specifying information for uniquely specifying the collection target vehicle, and the information corresponding to the item “collection time” is information regarding the time when the travel history is collected. Yes, the information corresponding to the item “travel route” is information for specifying the travel route on which the collection target vehicle has traveled, for example, information arranged in the order of travel of LIDs, which are information for uniquely identifying travel links. is there. The travel link LID includes not only the LID of the priority guide road but also the LID of the non-priority guide road. In addition, since a specific method for collecting travel histories in the collection target vehicle is well known, detailed description thereof is omitted.

  The information stored in the travel history DB 8b of the in-vehicle device 1 is the same information as the information stored in the travel history DB 16b of the center device 10 described later. Specifically, the center device 10 transmits a synchronization signal including information included in the travel history DB 16b of the center device 10 to all the in-vehicle devices 1 at a predetermined time interval (for example, every day). Each received in-vehicle device 1 updates the travel history DB 8b of the in-vehicle device 1 based on information included in the synchronization signal. A specific method for storing information in the travel history DB 16b of the center device 10 will be described later.

(Configuration-Center device)
Returning to FIG. 1, the center device 10 according to the present embodiment will be described. The center device 10 is a device that can communicate with the in-vehicle device 1 of each vehicle, and can be configured by, for example, a known server installed in a base station. Here, the center apparatus 10 generally includes a touch pad 11, a display 12, a speaker 13, a communication unit 14, a control unit 15, and a data recording unit 16.

(Configuration-Center device-Touchpad)
The touch pad 11 is an operation unit that receives various operation inputs from the user when pressed by a user's finger or the like. Although the specific configuration of the touch pad 11 is arbitrary, for example, a publicly known one provided with an operation position detecting means by a resistance film method or a capacitance method can be used.

(Configuration-Center device-Display)
The display 12 is a display unit that displays various images. Although the specific configuration of the display 12 is arbitrary, for example, a known flat panel display such as a liquid crystal display or an organic EL display can be used. Note that the touch pad 11 and the display 12 may be integrally formed as a touch panel.

(Configuration-Center device-Speaker)
The speaker 13 is sound output means for outputting information by sound. The specific form of the sound output from the speaker 13 is arbitrary, and it is possible to output a synthesized sound generated as necessary or a sound recorded in advance.

(Configuration-Center device-Communication unit)
The communication unit 14 is a communication unit that performs communication with the in-vehicle device 1 via a network. The specific type and configuration of the communication means are arbitrary. For example, a known mobile wireless communication means or a known VICS (registered trademark) system wireless communication means via FM multiplex broadcasting or beacon is used. be able to.

(Configuration-Center device-Control unit)
The control unit 15 is a control unit that controls the center device 10, and specifically, a CPU, various programs interpreted and executed on the CPU (basic control programs such as an OS, and a specific function that is activated on the OS. And an internal memory such as a RAM for storing the program and various data. In particular, the re-search program according to the embodiment substantially configures each unit of the control unit 15 by being installed in the center device 10 via an arbitrary recording medium or network.

(Configuration-Center device-Data recording unit)
The data recording unit 16 is a recording unit that records a program and various data necessary for the operation of the center apparatus 10, and is configured by 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 disk can be used instead of or together with the hard disk.

  The data recording unit 16 includes a map DB 16a and a travel history DB 16b.

  The map DB 16a is map information storage means for storing map information. Such map information in the map DB 16a is recorded by inputting via a predetermined recording medium, or recorded by receiving information distributed from a map distribution center (not shown).

  The travel history DB 16b is a travel history storage unit that stores the travel history of the collection target vehicle. As a specific method for inputting the travel history to the travel history DB 16b of the center device 10, for example, a travel history signal including the travel history collected by the collection target vehicle is transmitted to the center device 10 by a known method. The center device 10 receives the travel history signal, and stores various information included in the received travel history signal in the travel history DB 16b of the center device 10. In addition, since the same collection process is performed in each vehicle-mounted apparatus 1, the information regarding the traveling history of a large number of collection target vehicles is stored in the traveling history DB 16b of the center device 10. Further, as described above, since the travel history DB 8b of the in-vehicle device 1 is synchronized with the travel history DB 16b of the center device 10, the in-vehicle device 1 can also hold information related to the travel history of the other in-vehicle devices 1.

(processing)
Next, processing executed by the re-search system configured as described above will be described. In the following description of each process, the process that does not specify the control subject is assumed to be executed by the control unit 7 of the in-vehicle device 1 or the control unit 15 of the center device 10, and the information acquisition source and acquisition route are determined. Unless otherwise specified, the data is stored in advance in the data recording unit 8 of the in-vehicle device 1 or the data recording unit 16 of the center device 10 by a known timing and a known method, or the touch pad 2 of the in-vehicle device 1 or It is assumed that the user or the like inputs via the touch pad 11 of the center device 10. Step is abbreviated as “S”.

  Here, the process executed by the re-search system includes an initial search process and an initial search post-process. Hereinafter, each process will be described with reference to the drawings as appropriate.

(Processing-Initial search process)
The initial search process is an initial search process of the travel route of the search target vehicle that passes only the priority guide road in the initial search unit 7a. FIG. 2 is a diagram illustrating an example of a travel route of the search target vehicle. Although the timing for executing the initial search post-processing is arbitrary, the embodiment will be described as being started after the vehicle-mounted device 1 is powered on.

  Here, in FIG. 2, the priority guide road is indicated by a thick solid line, and among the non-priority guide roads (narrow streets), the road whose traffic volume is equal to or greater than the reference value is indicated by a thin solid line, and among the non-priority guide roads (narrow streets) Roads with a traffic volume less than the standard value are indicated by thin dotted lines. In the initial search process, it is assumed that the search target vehicle is at the own vehicle position A and the route to the destination is searched by the initial search unit 7a. A specific method for searching for such a travel route is arbitrary. For example, the cost is minimized by using the Dijkstra method with the required time, travel fee, road width, etc. for passing through each travel link as the link cost. Since the search can be performed by a known method of selecting a route, detailed description is omitted.

  In the initial search process, as a result of the travel route search, a route R1 (route that reaches the destination through the nodes N1, N7, N10, and N2) is extracted as a travel route, and this route R1 is mounted on the vehicle as a guide route. It is assumed that it is registered in the device 1. The route registered as the guidance route is displayed on the display 3 of the in-vehicle device 1, for example, and is appropriately guided to the driver of the search target vehicle by voice guidance or the like.

(Processing-Initial search post-processing)
The initial search post-process is a process executed after the initial search process in the initial search post-processing unit 7b. FIG. 3 is a flowchart of the initial search post-processing. Although the timing for executing the initial search process is arbitrary, the embodiment will be described as being started after the above-described initial search process is completed.

  First, as shown in FIG. 3, in SA1, the initial search post-processing unit 7b executes a determination process. Here, FIG. 4 is a flowchart of the determination process. This determination process is a process for determining whether or not the re-search timing has arrived.

  In SB1, the determination unit 7c determines whether or not the re-search icon is pressed. The specific method of this determination is arbitrary. For example, a re-search icon (not shown) is displayed on the display 3 of the in-vehicle device 1, and the user presses a position corresponding to the re-search icon on the touch pad 2. It is determined whether or not. If the re-search icon is pressed (SB1, Yes), it is assumed that there is a re-search request from the user and the re-search timing has arrived, and the process proceeds to SB4. On the other hand, when the re-search icon is not pressed (SB1, No), it is assumed that there is no re-search request from the user and the re-search timing has not arrived, and the process proceeds to SB2.

  In SB2, the determination unit 7c determines whether or not there is a traffic jam on the current guidance route. The specific method of this determination is arbitrary, and an example is shown below. First, the current guidance route is specified. This guide route is a route searched in the above-described initial search process, and specifically, is the route R1. Subsequently, it is determined from, for example, VICS (registered trademark) whether or not there is a traffic jam on the route R1. If there is a traffic jam on the route R1 (SB2, Yes), a re-search is necessary to avoid the traffic jam, and it is assumed that the re-search timing has arrived, and the process proceeds to SB4. On the other hand, when there is no traffic jam on the route R1 (SB2, No), it is determined that the current guidance route does not pass the traffic jam and the re-search timing has not arrived, and the process proceeds to SB3.

  In SB3, the determination unit 7c determines whether or not the current position of the vehicle has deviated from the current guidance route. The specific method of this determination is arbitrary. For example, whether or not the current position of the vehicle acquired by the current position detection unit 5 of the in-vehicle device 1 is on a link other than the link of the route specified as the guide route. May be determined. If the current guidance route has been deviated (SB3, Yes), the user may have made a mistake on the road and may not be able to reach the destination even if the route that is currently traveling is reached. And proceed to SB4. On the other hand, if the current guidance route is not deviated (SB3, No), the user can arrive at the destination through the current guidance route without making a mistake, and the re-search timing has not arrived. The determination process is terminated and the process returns to the post-search process shown in FIG.

  In SB4, the determination unit 7c turns on the re-search flag stored in the data recording unit 8 of the in-vehicle device 1. For example, as the re-search flag, either “1” meaning ON or “0” meaning OFF is stored, and the initial value = “0”. In SB4, “1” is stored in this re-search flag. This re-search flag is OFF in the initial state, and as described above, in the case of (SB1, Yes), (SB2, Yes), or (SB3, Yes), it is assumed that a re-search is necessary and ON. become. After the re-search flag is turned ON, the determination process is terminated and the process returns to the initial post-search process shown in FIG.

  Note that, as described above, whether or not the re-search timing has arrived is determined as to whether or not the re-search icon has been pressed (SB1), and whether or not there is traffic on the current guidance route (SB2). The three types of determinations are made as to whether or not the current position of the vehicle deviates from the current guidance route (SB3), but these are only examples and are not limited thereto.

  Returning to FIG. 3, at SA2, the initial search post-processing unit 7b determines whether or not the re-search flag is ON. The specific method of this determination is arbitrary, for example, whether “1” meaning ON or “0” meaning OFF is stored in the re-search flag of the data recording unit 8 of the in-vehicle device 1. It can be determined by checking. When the re-search flag is OFF (SA2, No), the SA1 determination process is repeatedly executed until the re-search flag is turned ON. On the other hand, when the re-search flag is ON (SA2, Yes), the process proceeds to SA3.

  In SA3, the initial search post-processing unit 7b executes a re-search process. Here, FIG. 5 is a flowchart of the re-search process. This re-search process is a process for the re-search unit 7d to re-search the guidance route. In the following, when the route R1 is registered as the guide route, the search target vehicle moves to the vehicle position B and deviates from the route R1 (that is, the determination process of FIG. 4). The re-search process will be described assuming that the re-search flag is ON (SB4) due to (SB3, Yes).

  In SC1, the re-search unit 7d extracts all travel routes from the current position (vehicle position B) of the search target vehicle to the destination. The specific method of this extraction is arbitrary, and for example, a combination of links existing from the vehicle position B to the destination may be specified by the Dijkstra method.

  In SC2, the re-search unit 7d extracts the travel history DB 8b of the in-vehicle device 1. The traveling history DB 8b of the in-vehicle device 1 stores traveling histories by a large number of collection target vehicles as described above, and also stores, for example, traveling histories on narrow streets shown in FIG.

  In SC3, the re-search unit 7d identifies the travel route with the lowest cost among the travel routes extracted in SC1. Here, the travel history extracted in SC2 is reflected in the cost of each link. Although the specific content of this reflection is arbitrary, in this embodiment, the traveling frequency of each link of the collection target vehicle is reflected. Specifically, a link having a high traveling frequency among the links is assumed to be capable of traveling safely with a large amount of traffic, thereby reducing the cost of the link. On the other hand, a link with a low traveling frequency among the links is assumed to have a low traffic volume and may not be able to travel safely, increasing the cost of the link. A specific method for determining the cost of each link is arbitrary. For example, first, based on information corresponding to the item “travel route” in the travel history DB 8b, a reference period (for example, 1 The sum total of the number of times of travel of each link within a week) (that is, the frequency of travel of each link) is tabulated regularly (for example, every day) and stored in the travel history DB 8b of the in-vehicle device 1. Then, in SC3, the cost of each link is obtained so as to be inversely proportional to the total number of times of travel of each link, and the travel route that can travel at the lowest cost is specified based on this cost. However, the running frequency of each link may be counted each time SC3 is executed. In the present embodiment, it is assumed that the route R2 (route sequentially passing through the nodes N5, N8, N9, N10, and N2) shown in FIG. 2 is specified as the route with the lowest cost by the re-search unit 7d.

  By adopting a method for identifying a travel route that refers to the travel history of the non-priority guide road stored in the travel history DB 8b of the in-vehicle device 1 as described above, the travel route that passes through the non-priority guide road as well as the priority guide road Can be extracted. However, the route that passes through the non-priority guide road is not always extracted as a result of the re-search. If the cost of the link is lower for the route that passes only the priority guide road, the route that passes only the priority guide road May be extracted.

  In SC4, the search unit 7d overwrites the travel route specified in SC3 as the guide route (route R2). By overwriting the guidance route in this way, it is possible to guide the driver of the vehicle to be searched for a new route after the re-search. Therefore, in the re-search system according to the present embodiment, it is possible to guide a safe travel route for both the vehicle and the pedestrian compared to the “system for re-searching without using the travel history of the non-priority guide road”. That is, in such a “system for re-searching without using the travel history of non-priority guide roads”, for example, even when re-searching at the vehicle position B, a route that passes only through the priority guide roads is re-searched. Therefore, the extracted travel route is, for example, the route R3 in FIG. 2 (route that sequentially passes through the nodes N5, N8, N3, N4, and N2). When such a roundabout route is guided, the driver of the vehicle to be searched is at his / her own discretion and travels through a non-priority guide road (for example, route R4 (nodes N5, N6, N7, N10, N2 sequentially) The route)) returns to the middle of the original guide route R1, and then travels to the destination. However, due to such self-judgment, if a vehicle travels on a narrow street where almost no vehicle normally passes, there is a possibility that the vehicle and pedestrians may be at risk. Therefore, in the re-search system according to the present embodiment (a system for re-searching using the travel history of non-priority guide roads), it is possible to perform a re-search including non-priority guide roads. Since a narrow street with a large amount of traffic can be guided, route guidance safe for vehicles and pedestrians becomes possible.

  Furthermore, the re-search system according to the present embodiment can improve the convenience of the driver as compared to the “system that searches for non-priority guide roads at any time of search” as in the prior art. In other words, in such a “system that includes a non-priority guide road at any time of search”, a route that passes through the non-priority guide road is searched even during the initial search. The route to reach may be guided as an optimum route (for example, the route with the lowest cost) during the initial search. However, even if it is an optimal route, it may be difficult to travel on a route including many non-priority guide roads, and non-priority guidance unless it is necessary for some users (for example, “re-search timing” shown in the present application). Sometimes you don't want to drive on the road. Therefore, in the re-search system according to the present embodiment, the re-search including the non-priority guide road can be performed only when the re-search timing arrives, and the non-priority guide roads are not necessarily required as in the initial search. It can prevent that a user's convenience falls by searching.

  In SC5, the re-search unit 7d turns off the re-search flag stored in the data recording unit 8 of the in-vehicle device 1. For example, in SC5, “0” meaning OFF is stored in the re-search flag. That is, since the re-search has already been completed in SC4, it is not necessary to perform the re-search again, and the re-search flag is turned OFF. This completes the re-search process, returns to the post-initial search process shown in FIG. 3, and ends the post-initial search process. Thereafter, as long as the power source of the in-vehicle device 1 is turned on, the same post-initial search process is repeatedly executed.

(Effect of embodiment)
As described above, according to the present embodiment, when the re-search timing arrives, the travel route is re-searched based on the travel history including the travel history of the non-priority guide road by the collection target vehicle. As described above, it is possible to prevent the convenience of the user from being lowered due to the search for the non-priority guide roads to the timing at which the search for the non-priority guide roads is not necessarily required.

  In addition, when the re-search timing arrives, the travel route is re-searched based on the travel history including the travel frequency of the non-priority guide road by the collection target vehicle. The priority guide road can be preferentially searched, and the driver can be prevented from traveling on a dangerous non-priority guide road with less traffic.

[Modifications to Embodiment]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention may be arbitrarily modified and improved within the scope of the technical idea of the present invention described in the claims. Can do. 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. In some cases, only a part of the effects described above can be achieved.

(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. The “system” in the present application is not limited to one configured by a plurality of devices, but includes one configured by a single device. In addition, the “apparatus” in the present application is not limited to one configured by a single apparatus, but includes one configured by a plurality of apparatuses. For example, each unit of the in-vehicle device 1 and the center device 10 is configured by being distributed among a plurality of devices configured to be able to communicate with each other, and the plurality of devices communicate with each other, whereby the in-vehicle device 1 and the center device 10 You may make it exhibit the same function.

(About shape, numerical value, structure, time series)
Regarding the constituent elements exemplified in the embodiment and the drawings, the shape, numerical value, or the structure of a plurality of constituent elements or the mutual relationship in time series may be arbitrarily modified and improved within the scope of the technical idea of the present invention. Can do.

(About initial search processing)
In the present embodiment, in the initial search process, the travel route is searched without being based on the travel history DB 8b of the in-vehicle device 1. However, the present invention is not limited to this, and the initial search process also refers to the travel history DB 8b of the in-vehicle device 1. You may search for routes. Further, as the travel history to be referred to at this time, not only the travel history of the priority guide road but also the travel history of the non-priority guide road may be used. However, even in this case, the route finally extracted as a result of the initial search is the priority guide road.

(About initial search processing)
In the present embodiment, in the initial search post-process shown in FIG. 5, in SC3, the re-search unit 7 specifies the cost of each link based only on the travel frequency of each link stored in the travel history DB. Costs may be identified based on other factors. For example, since some users desire to return to the original guidance route (for example, the initial search route) as soon as possible, at SC3, the re-search unit 7 links the original guidance route or the original guidance so as to meet the desire. You may reduce the cost of the link connected to a route. By reducing the cost of these links, it becomes easy to specify a travel route that returns to the original guide route as a new guide route, and convenience for the user is improved.

[Characteristics and effects of the embodiment]
Finally, some of the features and effects of the embodiments described so far are exemplified below. However, the features and effects of the embodiment are not limited to the following contents, and only some of the following effects are achieved by including only a part of the following features, or other than the following features. By providing the characteristics, there may be other effects than the following effects.

  A re-search system according to one aspect 1 of the embodiment is a re-search system that re-searches a travel route of a search target vehicle, and searches for a travel route of the search target vehicle that passes only a priority guide road. A travel history storage means for storing the travel history of the collection target vehicle, a determination means for determining whether or not a re-search timing for the travel route of the search target vehicle has arrived, and a re-search timing has arrived at the determination means The travel history stored in the travel history storage means, the travel route of the search target vehicle is determined based on the travel history including the travel history of the non-priority guide road by the collection target vehicle. Re-searching means for re-searching.

  According to the re-search system according to aspect 1, when the re-search timing arrives, the travel route is re-searched based on the travel history including the travel history of the non-priority guide road by the collection target vehicle. It is possible to re-search the driving route including the non-priority guide road suitable for driving, and the driver is a non-priority guide road that is not suitable for driving, for example, a road on which a vehicle is difficult to travel or traffic of the vehicle is dangerous. It is possible to prevent traveling on non-priority guide roads including roads and the like.

  The re-search system according to another aspect 2 of the embodiment is the re-search system according to the above aspect 1, wherein the travel history of the non-priority guide road by the collection target vehicle is the non-priority guide road by the collection target vehicle. Contains information on driving frequency.

  According to the re-search system according to the aspect 2, when the re-search timing arrives, the travel route is re-searched based on the travel history including the travel frequency of the non-priority guide road by the collection target vehicle. It is possible to preferentially search for a non-priority guide road with a lot of traffic of vehicles and high safety, and it is possible to prevent the driver from traveling on a dangerous non-priority guide road with less traffic of vehicles.

  A re-search program according to another aspect 3 of the embodiment is a re-search program for re-searching a travel route of a search target vehicle, and searches a travel route of the search target vehicle that passes only a priority guide road. Search means, travel history storage means for storing the travel history of the collection target vehicle, determination means for determining whether or not a re-search timing for the travel route of the search target vehicle has arrived, and re-search in the determination means When it is determined that the timing has arrived, based on the travel history stored in the storage means storage means and including the travel history of the non-priority guide road by the collection target vehicle, the search target vehicle It functions as re-search means for re-searching the travel route.

  According to the re-search system according to the above aspect 3, when the re-search timing arrives, the travel route is re-searched based on the travel history including the travel history of the non-priority guide road by the collection target vehicle. It is possible to re-search the driving route including the non-priority guide road suitable for driving, and the driver is a non-priority guide road that is not suitable for driving, for example, a road on which a vehicle is difficult to travel or traffic of the vehicle is dangerous. It is possible to prevent traveling on non-priority guide roads including roads and the like.

DESCRIPTION OF SYMBOLS 1 In-vehicle apparatus 2 Touchpad 3 Display 4 Speaker 5 Current position detection part 6 Communication part 7 Control part 7a Initial search part 7b Initial search post-processing part 7c Determination part 7d Re-search part 8 Data recording part 8a Map DB
8b Reference point DB
8c Travel history DB
DESCRIPTION OF SYMBOLS 10 Center apparatus 11 Touchpad 12 Display 13 Speaker 14 Communication part 15 Control part 16 Data recording part 16a Map DB
16b Reference point DB
16c Travel history DB
A own vehicle position B own vehicle position N1-N10 node R1-R4 route

Claims (3)

A re-search system for re-searching a travel route of a search target vehicle,
Search means for searching for a travel route of the search target vehicle that passes only through the priority guide road;
Traveling history storage means for storing the traveling history of the vehicle to be collected;
A determination means for determining whether or not a re-search timing of the travel route of the search target vehicle has arrived;
When the determination means determines that the re-search timing has arrived, the travel history is stored in the travel history storage means and is based on the travel history including the travel history of the non-priority guide road by the collection target vehicle. Re-search means for re-searching the travel route of the search target vehicle,
Re-search system. The travel history of the non-priority guide road by the collection target vehicle includes information on the travel frequency of the non-priority guide road by the collection target vehicle.
The re-search system according to claim 1. A re-search program for re-searching a travel route of a search target vehicle,
Computer
Search means for searching for a travel route of the search target vehicle that passes only through the priority guide road;
Traveling history storage means for storing the traveling history of the vehicle to be collected;
A determination means for determining whether or not a re-search timing of the travel route of the search target vehicle has arrived;
When the determination means determines that the re-search timing has arrived, based on the travel history stored in the storage means storage means and including the travel history of the non-priority guide road by the collection target vehicle Re-search means for re-searching the travel route of the search target vehicle;
Re-search program to function as.

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