JP2011058843A - Navigation device, navigation system, and navigation program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To positively and appropriately inform a user of the existence of guide objects (facilities, for example) around a moving body (user and vehicle, for example) according to tastes of the user. <P>SOLUTION: A navigation device 10 for displaying a current position of the moving body (user and vehicle, for example) on a map in a display screen of a display device (image display device 31, for example), and guiding the moving body to a destination includes: a map information storage F2 for storing map information; a POI information storage F3 for storing POI information; and a taste information storage F7 for storing taste information. The navigation device detects a current position of the moving body, searches for POI information representing guide objects existing within a predetermined range from the detected current position, selects POI information containing guide-object identification information displayed on the display screen from among the searched POI information on the basis of taste information, and displays, on the display screen, guide information (guide plate, for example) containing the guide object identification information included in the selected POI information. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a navigation device, a navigation system, and a navigation program for controlling the operation of a navigation device that guides facilities and the like existing in a search range.

  2. Description of the Related Art Conventionally, many navigation devices having a function of receiving a search condition input by a user and searching for a facility that suits the user's purpose from a large number of facilities have been proposed. Many of such navigation devices have a function of searching for facilities existing within a predetermined range based on the current position of the user (hereinafter referred to as “periphery search function”). Further, the current position of the user is calculated, and the area and the recommended point existing in the area are stored in association with each other, and when the designation of the destination by the user is accepted, the current position exists in the area where the current position exists. A navigation device that searches for a recommended point and displays the searched recommended point has also been proposed (see Patent Document 1).

JP 2009-042083 A

  However, in the above-described conventional navigation device, a search is executed by accepting a user request to search for a facility. Therefore, if a user does not give any search instruction, a facility that matches the user's preference is searched around. Even if it exists within the searchable range, the presence is overlooked and the convenience is lacking. However, in order to avoid this, for example, if it is configured to search for peripheral facilities at a predetermined timing regardless of whether there is a user's search instruction, only information that is not valid for the user is searched and displayed. As a result, there is a problem that the user may be stressed.

  In order to solve the above-described problems, an object of the present invention is to be able to actively and appropriately notify the presence of a facility around a user according to the user's preference.

  A navigation device of the present invention is a navigation device that displays a current position of a moving body on a map on a display screen of a display device and guides the moving body to a destination, and stores a map information including road information Information storage means, POI information storage means for storing POI information including guidance object specifying information indicating a guidance object, evaluation of the POI information, and when the guidance object specifying information is displayed on the display screen Preference information storage means for storing preference information including information indicating the time and place of the vehicle, position detection means for detecting the current position of the mobile body, and based on the current position detected by the position detection means Reference position determination means for determining a reference position, and POI information indicating a guide object existing within a predetermined range from the reference position determined by the reference position determination means POI information search means for searching for, and when there are a plurality of POI information searched by the POI information search means, a position relation value calculation means for calculating a position relation value between guidance objects indicated by the plurality of POI information, , Similarity value determination means for determining a similarity value indicating similarity between the plurality of POI information, the preference information stored in the preference information storage means, and the guidance target calculated by the positional relationship value calculation means Based on the positional relationship value between the objects and the similarity value determined by the similarity value determination means, the guidance target object displayed on the display screen from the POI information searched by the POI information search means POI information selection means for selecting POI information including information, and guidance information including the guidance target object specifying information included in the POI information selected by the POI information selection means. Position guide object is present is characterized in that it comprises a guidance information display means for displaying identifiably the display screen or in any direction as viewed from the reference position.

  With the above configuration, the presence of facilities around the user can be actively and appropriately notified according to the user's preference.

  In the navigation device of the present invention, the positional relationship value calculating unit extracts the predetermined number of POI information from the POI information searched by the POI information searching unit. The positional relation value between the guidance objects indicated by the combination of the POI information is calculated, and the POI information selecting means is calculated by the positional relation value calculating means from the POI information searched by the POI information searching means. It is good also as a structure which selects the combination of the said POI information according to the positional relationship value between guidance objects.

  In the navigation apparatus of the present invention, the similarity value determining means is combined for all combinations of POI information when a specific number of POI information is extracted from the POI information searched by the POI information searching means. The similarity value between the POI information is determined, and the POI information selection unit is configured to select the POI according to the similarity value determined by the similarity value determination unit from the POI information searched by the POI information search unit. A combination of information may be selected.

In the navigation system of the present invention, the information management server and the navigation device that displays the current position of the moving body on the map on the display screen of the display device and guides the moving body to the destination via the communication network. A navigation system for communication, wherein the navigation device includes map information storage means for storing map information including road information, and POI information storage means for storing POI information including guidance object specifying information indicating a guidance object. Preference information storage means for storing preference information including evaluation on the POI information and information indicating the time and place when the guidance object specifying information is displayed on the display screen; A position detecting means for detecting a position, and a base for determining a reference position based on the current position detected by the position detecting means. Position determining means, POI information searching means for searching for POI information indicating a guide object existing within a predetermined range from the reference position determined by the reference position determining means, and the POI information searching means searched for Guide POI information storage means for storing guide POI information in which POI information and points are associated with each other, and when there are a plurality of POI information retrieved by the POI information retrieval process, a guidance object indicated by the plurality of POI information Positional relationship value calculating means for calculating a positional relation value between them, similarity value determining means for determining a similarity value indicating similarity between the plurality of POI information, and POI information searched by the POI information searching means Including POI information transmitting means for transmitting to the information management server and server information receiving means for receiving information transmitted from the information management server, The information management server includes user information management means for acquiring and managing user information including the preference information from a plurality of navigation devices, and POI information transmitted from one of the plurality of navigation devices by the POI information transmission means. POI information receiving means for receiving the POI information, and referring to the preference information managed by the user information management means in response to the POI information receiving means receiving the POI information, the plurality of navigation devices Similar user information specifying means for specifying user information in which preference information similar to the preference information corresponding to one is set, and the preference information included in the user information specified by the similar user information specifying means is referred to P in which the user's evaluation is set higher than a predetermined standard in the POI information received by the receiving means Evaluation determination means for determining whether or not OI information is included, and determination result transmission means for transmitting a determination result by the evaluation determination means to one of the plurality of navigation devices, the navigation device further comprising: The preference information stored in the preference information storage means, the positional relation value between the guidance objects calculated by the positional relation value calculation means, the similarity value determined by the similarity value determination means, and the server Guide POI information update means for updating the guide POI information stored in the guide POI information storage means based on the determination result received by the information receiving means, and stored in the guide POI information storage means POI information selection means for preferentially selecting POI information having a high corresponding point from the POI information, and the POI information selection means Therefore, the guidance information including the guidance object specifying information included in the selected POI information is displayed on the display screen so that it can be identified in which direction the position where the guidance object exists is viewed from the reference position. Guidance information display means.
In the navigation system of the present invention, the evaluation determination unit includes a feature information extraction unit that extracts feature information indicating a user's preference from the preference information, and the guidance POI information update unit includes the feature information extraction unit. The point may be updated with respect to the POI information including the extracted feature information.

  The navigation program of the present invention is a navigation program for controlling the operation of the navigation device so as to display the current position of the moving body on a map on the display screen of the display device and guide the moving body to the destination. In the navigation device, a position detection process for detecting a current position of the moving body, a reference position determination process for determining a reference position based on the current position detected in the position detection process, and the reference position When there are a plurality of POI information retrieved by the POI information retrieval processing and the POI information retrieval processing that retrieves POI information indicating the guidance object existing within a predetermined range from the reference position determined by the determination processing. A positional relationship value calculation process for calculating a positional relationship value between the guidance objects indicated by the plurality of POI information, and the plurality of POIs A similarity value determination process for determining a similarity value indicating similarity between reports, and an evaluation of the POI information stored in the POI information storage means for storing POI information including guidance object specifying information indicating the guidance object , The preference information stored by preference information storage means for storing preference information including information indicating the time and place when the guidance object specifying information is displayed on the display screen, and the positional relationship value calculation Based on the positional relationship value between the guidance objects calculated in the process and the similarity value determined in the similarity value determination process, the POI information searched by the POI information search process POI information selection processing for selecting POI information including guidance target object specifying information to be displayed on the display screen, and the guidance target object including the POI information selected by the POI information selection processing. Guidance information display processing for displaying guidance information including information on the display screen so that it can be identified in which direction the position where the guidance object exists is viewed from the reference position. is there.

  According to the present invention, the presence of facilities around a user can be actively and appropriately notified according to the user's preference.

It is the schematic which shows an example of the route guidance system using the navigation apparatus which concerns on this invention. It is a block diagram which shows the example of a structure of the navigation apparatus concerning this invention. It is explanatory drawing which shows the example of the storage state of POI information memorize | stored in the POI information storage part with which the navigation apparatus which concerns on this invention is provided. It is explanatory drawing which shows the example of the storage state of the guide plate information memorize | stored in the guide plate information storage part with which the navigation apparatus which concerns on this invention is provided. It is explanatory drawing which shows the example of the storage state of the guidance history information memorize | stored in the guidance history information storage part with which the navigation apparatus which concerns on this invention is provided. It is explanatory drawing which shows the example of the storage state of the guidance POI information memorize | stored in the guidance POI information storage part with which the navigation apparatus which concerns on this invention is provided. It is explanatory drawing which shows the example of the storage state of the preference information memorize | stored in the preference information storage part with which the navigation apparatus which concerns on this invention is provided. It is explanatory drawing for demonstrating the concept of the guide plate in this example. It is explanatory drawing for demonstrating the concept of the guide plate in this example. It is a flowchart which shows the example of the guide plate display process in this example. It is a flowchart which shows the example of the guide plate display process in this example. It is explanatory drawing which shows the example of a display screen when displaying a guidance plate. It is explanatory drawing for demonstrating the example of the display form of a guide plate. It is explanatory drawing which shows the example of a preference information reception screen. It is a flowchart which shows the example of the guidance POI determination process in this example. It is explanatory drawing which shows the example of a positional relationship score table. It is a flowchart which shows the example of the guidance log | history information display process in this example. It is explanatory drawing for demonstrating the determination method of the search range of POI information. It is explanatory drawing for demonstrating the example of the display form of a guide plate. It is the schematic which shows an example of the navigation system using the navigation apparatus which concerns on this invention. It is a flowchart which shows an example of guidance POI determination processing.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing an example of a route guidance system 100 using a navigation device 10 according to the present invention. As shown in FIG. 1, the route guidance system 100 of the present example includes a navigation device 10, a vehicle positioning device 50, an output device 30, and an input device 40.

  The own vehicle position measurement device 50 will be described by taking a moving body (hereinafter, “vehicle” as an example. The “moving body” includes the navigation device 10 itself, and an object such as a vehicle or a person moving with the navigation device 10. A GPS sensor that receives a GPS signal sent from a GPS satellite and measures the position based on the GPS signal, and a movement amount (distance) from the initial position. It consists of a speed sensor that measures the angle, a gyro sensor that measures the traveling (moving) direction, and the like.

  A GPS sensor is a so-called GPS receiver, receives a GPS signal radiated from a GPS satellite, measures a distance (pseudo distance) between the GPS satellite and the GPS receiver itself, and receives a plurality of satellites. Are simultaneously received to calculate the current position (GPS positioning solution) of the GPS receiver itself.

  The vehicle positioning device 50 is mounted on a vehicle, and performs a process such as decoding of the received GPS signal in addition to a GPS receiver (antenna) that receives the GPS signal, and a signal that is output to the navigation device 10 A processing unit is provided.

  The output device 30 is a device that outputs route guidance information and the like from the navigation device 10, and for example, an image display device (display device, monitor) 31 that displays image information, and an audio output device (speaker) that outputs audio information as audio. Device) 32. The image display device 31 displays the map information and the current position information of the vehicle on the display screen, and also displays the optimum guidance route to the destination together on the display screen, so that the route of the moving route can be visually confirmed. Is notified. In addition, the voice output device 32 outputs the guidance voice information as a voice, thereby informing the route of the moving route by hearing.

  The input device 40 is a device for issuing various instructions to the navigation device 10. In this example, the input device 40 is configured by operation buttons displayed on the display screen of the output device 30, for example.

  The navigation apparatus 10 is configured by an information processing apparatus such as a mobile type personal computer, a PND (Portable Navigation Device), or a dedicated device. The navigation device 10 includes a CPU (Central Processing Unit), a program storage unit, an OS (Operating System), and the like. The CPU has a function of controlling and controlling each component of the navigation device 10 according to a computer program stored in the program storage unit, and executing various processes including a route search process, a route guidance process, and an information search process. The program storage unit includes a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and is a storage medium that stores various computer programs used by the navigation device 10.

  FIG. 2 is a block diagram showing a configuration example of the navigation device 10 in this example. As shown in FIG. 2, the navigation device 10 includes a storage unit F, a route search unit 11, a host vehicle position information reception unit 12, a direction information reception unit 13, a reference position determination unit 14, a POI (Point Of). (Interest) includes an information search unit 15, a guide plate creation unit 16, a POI information guide unit 17, an information similarity determination unit 18, a score calculation assigning unit 19, a guide POI selection unit 20, and a control unit C. . In addition, each part which comprises the navigation apparatus 10 is connected to the bus | bath B which transmits a control signal, data, etc.

  The route search unit 11 performs route search processing for deriving a guidance route from a departure position (for example, current position) to a destination. In the route search process, for example, the input of destination information from the user is received, the location information of the destination is specified based on the received destination information, and the current location to the destination is referenced with reference to the destination. A process for deriving a guide route and generating a map around the travel route including a road map including the derived guide route is performed. In addition, since a well-known technique is used about a route search process, detailed description here is abbreviate | omitted.

  The own vehicle position information receiving unit 12 performs a process for receiving the current position information of the vehicle. Here, the current position is indicated by latitude and longitude, for example. In this example, it is assumed that the current position information measured by the own vehicle position measuring device 50 is received.

  The azimuth information receiving unit 13 receives azimuth information specifying the traveling direction of the vehicle from the own vehicle position measurement device 50.

  The reference position determination unit 14 has a function of determining a reference position for determining a POI information search range in a guide plate display process described later. In this example, an intersection (hereinafter referred to as a “branch point”) that is reached when the vehicle travels along a road is determined as a reference position according to the current position of the vehicle and the traveling direction (hereinafter referred to as the reference position). The branch point determined as is referred to as “guide branch point”), and the information about the guide branch point such as the name and node ID of the guide branch point and the road shape is stored in the guide plate information storage unit F4.

  Note that a plurality of branch points to be determined as reference positions may be selected. In this case, based on the traveling speed of the vehicle, etc., a branch point existing in a range where the vehicle is expected to reach within a predetermined time or a branch point located within a predetermined distance from the current position is determined as a reference position. You just have to do it. Moreover, it is good also as a structure which selects the own vehicle position and a predetermined | prescribed facility as a reference position.

  The POI information search unit 15 refers to the POI information storage unit F3, searches for POI information indicating facilities and the like existing within a predetermined range from the reference position determined by the reference position determination unit 14, and guides the search results. It has the function to memorize | store in the plate information storage part F4. In this example, the POI information search unit 15 specifies a road that can travel from the guidance branch point (hereinafter referred to as a travelable road) and delimits the road by a predetermined distance, a predetermined number of links, or the like. A road section is specified, and a road section connected to the road section from each specified road section is specified, and a facility (that is, along a travelable road) located around the road section is set as a search range. As a method for determining the search range, for example, the POI information storage unit F3 may manage each POI information in association with road sections and search for facilities associated with the identified road sections. And it is good also as a structure which searches the plant | facility in the predetermined range like a predetermined distance width | variety from the specified road area. Moreover, it is good also as a structure which enlarges the width | variety made into a search range, as the road section far from the own vehicle position.

  The POI information search unit 15 has a function of performing feature information extraction processing for extracting feature information such as important words (keywords) from the POI information and storing it. Note that the feature information extraction process uses, for example, a general keyword determination method using morphological analysis and TFIDF (term frequency and inverse document frequency), which are well-known techniques, and detailed description thereof is omitted here. .

  Here, in this example, it is assumed that the road that can travel from the guidance branch point is stored in advance as road information. That is, the road information in the present example includes information indicating a travelable direction for each lane in a road including a plurality of lanes, for example.

  In accordance with the road shape of the guidance branch point and the search result of the POI information search unit 15, the guide plate creation unit 16 assigns the names of facilities and the like existing in each direction based on the current position and traveling direction of the user. It has a function of creating a guide plate for notifying the user in a form associated with a road section. As a result, it is possible to identify in which direction the position where the facility exists is viewed from the reference position. The guide plate will be described in detail later.

  The POI information guide unit 17 displays the reference position determined by the reference position determination unit 14, the road section specified by the POI information search unit 15, and the facility indicated by the searched POI information on the display screen of the image display device 31. Among them, a process for displaying the guidance object indicated by the POI information selected as “Guidance POI” by the guidance POI selection unit 20 so as to be distinguishable from other map information by highlighting, icon display, or the like. Do. Further, the POI information guide unit 17 in this example refers to the guide plate information storage unit F4, and in response to the vehicle approaching within a predetermined range with respect to the branch point indicated by the guide plate information, for a predetermined period. (For example, from displaying the guide plate until the vehicle passes the guide branch point or until the time when another guide plate is displayed.) The function of displaying the guide plate on the display screen and the guided POI information It has the function to memorize | store in guidance guidance information storage part F5 as information.

  Further, the POI information guide unit 17 refers to the guide history information storage unit F5 in response to receiving a guide history information display request from the user, and sets a predetermined display condition (for example, a guide plate displayed within one hour). Various functions for guiding the facility to the user, such as a function for displaying the POI information according to the POI information.

  The information similarity determination unit 18 has a function of comparing a plurality of POI information, determining a similarity value indicating the similarity, and outputting the similarity value. In this example, the information similarity determination unit 18 determines the identity of the contents for each item indicating a plurality of pieces of information constituting the POI information, and the number of items determined to be the same is stored in advance. The similarity value is determined based on the reference.

  Note that the method for determining the similarity between POI information is not limited to this. For example, various methods such as a method of weighting in consideration of the influence on the similarity between POI information for each piece of information constituting the POI information. Can be considered.

  The score calculation / giving unit 19 has a function of calculating personal scores, ranking scores, and TPO scores using various information as indices in a guide POI determination process described later, and assigning them to each POI information as POI provisional scores. Further, the positional relationship value indicating the positional relationship between the guidance objects indicated by the plurality of POI information calculated by the route search unit 11 is used as the positional relationship score, and the plurality of POI information determined by the information similarity determination unit 18 It has a function of converting a similarity value indicating similarity into a similar score, and adding or subtracting it to a total value of POI provisional scores when a plurality of POI information is combined.

  The guide POI selection unit 20 selects a predetermined number of guide POI candidate information from a plurality of guide POI candidate information in a guide POI determination process described later, and POI information (hereinafter, referred to as POI information guide unit 17). And has a function of performing processing for storing the information in the guide plate information storage unit F4.

  The control unit C includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc., and each of the navigation devices 10 according to a computer program (navigation program) stored in the storage unit F. It has the function of controlling and controlling the components and executing the processing.

  The storage unit F is a storage medium configured with a ROM, a RAM, or the like, and stores various computer programs used by the navigation device 10. The storage unit F in this example includes a guidance route information storage unit F1, a map information storage unit F2, a POI information storage unit F3, a guide plate information storage unit F4, a guidance history information storage unit F5, and a guidance POI information storage. Part F6 and preference information storage part F7.

  Although not shown, it is assumed that the navigation device 10 in this example has a communication function, and various information stored in the storage unit F can be updated according to time and the like.

  The guidance route information storage unit F1 is a storage medium that stores the guidance route derived by the route search unit 11.

  The map information storage unit F2 is a storage medium that stores map information by dividing it into rectangular ranges (mesh) delimited by a fixed longitude width and latitude width. In addition to being stored in the map information storage unit F2, the map information can be stored in an auxiliary storage device as a removable medium called an SD memory card, a CD-ROM, a DVD-ROM, or the like. Further, the map information may be downloaded via a communication network such as the Internet. Further, the map information storage unit F2 manages roads as nodes and links, and stores road configuration node information and road configuration link information in association with position information for each road.

  The POI information storage unit F3 is a guide object (store, facility, resort, etc.) such as store information such as a gas station, convenience store, ramen store, hotel, inn, facility information indicating a famous facility, resort resort information indicating a resort resort, etc. ) Is a storage medium for storing POI information. FIG. 3 is an explanatory diagram showing an example of the storage state of POI information in the POI information storage unit F3. As shown in FIG. 3, the POI information in this example includes a POI-ID for uniquely identifying a guidance object such as a facility, the name of the guidance object such as a facility, an address, a latitude / longitude, This is information in which a telephone number, a ranking, a recommended time (time), an introductory article, and the like are associated with each other. Here, the “ranking” in this example is a degree of popularity information obtained by extracting and classifying genres and keywords from articles such as information magazines using known techniques such as morphological analysis described later, and researching and classifying the genres and keywords. Means. The “ranking” may be a ranking by an information provider such as a company, or may be a ranking based on a result of totaling evaluations by a plurality of general users. The same applies to the “introduction article”.

  The guide plate information storage unit F4 is a storage medium that stores guide plate information used by the guide plate creation unit 16 to create a guide plate. FIG. 4 is an explanatory diagram showing an example of a storage state of guide plate information in the guide plate information storage unit F4. As shown in FIG. 4, the guidance plate information is information including the name of the guidance branch point, the node ID, the road shape, and the guidance POI information selected by the guidance POI selection unit 20. Here, the guide POI information in the guide plate information is stored in a state in which the road section indicated by the link ID and the POI-ID are associated with each other. In this example, the guide plate information is created when the reference position determination unit 14 reads out necessary information from the map information storage unit F2 and the POI information storage unit F3 and stores it in the guide plate information storage unit F4.

  The guidance history information storage unit F5 is a storage medium that stores POI information guided by the POI information guidance unit 17 as guidance history information. FIG. 5 is an explanatory diagram illustrating an example of a storage state of guidance history information in the guidance history information storage unit F5. As shown in FIG. 5, the guidance history information indicates the guidance branch point name in the guidance plate information guided by the POI information guidance unit 17, the guidance time (for example, the branch point passage time), and the guided POI information. The POI-ID is identified by the user's evaluation (for example, “Y” indicating good evaluation, “N” indicating bad evaluation, and “E” indicating that the evaluation is not input. "Evaluation").

  The guidance POI information storage unit F6 is a storage medium that stores the POI information searched by the POI information search unit 15. FIG. 6 is an explanatory diagram illustrating an example of a storage state of the guide POI information in the guide POI information storage unit F6. As shown in FIG. 6, the guide POI information includes the position of the guide branch point, the group number, the POI-ID, various scores calculated and given in the guide POI determination process described later, and guide POI candidates. Information indicating whether or not there is information associated with information indicating whether or not the guidance POI information is selected. Here, the group number serves as an ID for specifying a group set in each POI information searched in the guidance POI determination process described later.

  The preference information storage unit F7 is a storage medium that stores preference information that is information indicating the user's preference. In this example, among the POI information stored in the POI information storage unit F3, the POI information input by the user and the POI searched by the user using the search function of the navigation device 10 and set as the destination or waypoint Information and POI information guided by the guide plate are stored.

  FIG. 7 is an explanatory diagram illustrating an example of a storage state of preference information in the preference information storage unit F7. As shown in FIG. 7, the preference information includes POI-ID, user evaluation for POI information, feature information (keyword) indicating the characteristics of POI information, the number of searches by the user, search history by the user, and guidance. The information includes the number of times of guidance by the plate, the time and location (node ID) of guidance by the guidance plate, and the guidance evaluation received at that time. The user evaluation in this example is 10 to −10, and the higher the numerical value, the higher (good) the user's evaluation. In addition, the evaluation method by a user is not limited to this, For example, it is good also as a structure which evaluates POI information in about five steps.

  Here, in this example, the keywords of each POI information are extracted and stored by the POI information search unit 15. Specifically, a morphological analysis is performed on a character string stored as POI information to extract words used in the character string, and an important word is determined using the TFIDF method. In order to calculate TFIDF, the number of occurrences of keyword candidates (word appearance frequency TF), the total number of documents (D), and the number of documents including representative keyword candidates ( DF) is required. In this example, a document from which keywords are extracted is each POI information, and a word appearance frequency TF is obtained from a character string stored in each POI information. Further, the total number of POI information stored in the POI information storage unit F3 is used as the document number D. A plurality of keywords may be extracted for one POI information. In this example, it is assumed that a term whose importance is higher than a certain standard is stored as a keyword.

  Next, the concept of the guide plate in this example will be described. 8 and 9 are explanatory diagrams for explaining the concept of the guide plate in this example. In FIG. 8, the current location of the vehicle is P, the branch points located in the traveling direction of the vehicle are A and B, and the locations of the facilities and the like existing around the road (travelable road) in the direction leaving the branch points A and B Guide icons to be shown are indicated by S1 to S9.

  When the vehicle moves within a predetermined distance with respect to the branch point A (for example, the point AS in FIG. 8), the guide plate creation unit 16 performs a process of creating a guide plate corresponding to the guide branch point (branch point A). Do.

  FIG. 9A is an explanatory view showing an example of the guide plate at this time. As shown in FIG. 9A, the guide plate displays a road shape display area 101 for displaying an arrow corresponding to the road shape at the branch point A, and a name such as a facility indicated by the guide icon in the road shape display area 101. Among the displayed arrows, facility name display areas 102 to 104 for displaying in the vicinity of an arrow that points in a direction indicating the location of the corresponding facility, and a branch point name display area 105 for displaying the name of the branch point A are included.

  Similarly, when the vehicle moves within a predetermined distance with respect to the branch point B, which is a guide branch point (for example, the point BS in FIG. 8), the guide plate creating unit 16 turns the branch point as shown in FIG. 9B. The process which produces the guide plate according to B is performed.

  Note that the guide plate may be formed in a form in which a plurality of guide branch points are combined as shown in FIG. 9C, for example, instead of each guide branch point. That is, for example, the form of the guide plate is determined by determining whether or not the distance between the plurality of guide branch points is within a specific distance. Also, as a guide plate, a list showing names of facilities corresponding to each travelable road at the guidance branch point is created and displayed so that the correspondence with the travelable road displayed on the display screen can be identified. It is good also as a structure.

  In addition, the guide plate creating unit 16 in this example creates a guide plate for guiding a predetermined number of guide objects that meet the user's preference according to the result of a guide POI determination process described later. With such a configuration, it is possible to provide information that is effective for the user. Further, by restricting the information displayed on the display screen, it is possible to prevent the display screen from becoming complicated. In consideration of a general display screen size and the like, it is considered that the number of pieces of information that can be grasped at a time by the user is preferably about three. However, the number of information to be displayed on the display screen is not limited to this. For example, the display number may be changed according to the vehicle status (traveling speed, time zone, etc.).

  Next, the operation of the navigation device 10 of the present invention will be described with reference to the drawings. Note that detailed descriptions of processes not particularly related to the present invention may be omitted.

  10 and 11 are flowcharts showing an example of guide plate display processing executed by the navigation device 10. In the guide plate display process, a process is performed for searching and guiding facilities existing in each branching direction from the branch point located in the traveling direction of the vehicle (the direction where the travelable road is headed). The “guidance” here is intended to introduce the existence of a facility to the user, and it is not always necessary to guide the user to the facility.

  The guide plate display process in this example is automatically started when the navigation device 10 is turned on. Note that the guide plate display process in the navigation device 10 is configured to be stopped when, for example, accepting that the user presses a specific button.

  In the guide plate display process, first, the control unit C receives the current position information by the own vehicle position information receiving unit 12, and refers to the map information stored in the map information storage unit F2, and the road section in which the vehicle is traveling (Node ID and link ID) are specified (step S101).

  When the traveling road section is specified, the control unit C specifies the traveling direction of the vehicle by the direction information receiving unit 13, and passes or arrives when the vehicle has traveled a predetermined distance along the road by the reference position determination unit 14. It is determined whether or not there is a point (step S102). Here, when there is no branch point within the predetermined distance (N in Step S102), the control unit C transitions to Step S101.

  When there is a branch point within a predetermined distance (Y in step S102), the control unit C further determines whether or not there are a plurality of branch points within the predetermined distance by the reference position determination unit 14 (step S103). Here, when there is one branch point (N in step S103), the control unit C specifies this branch point as a guide branch point, and transitions to step S107.

  When there are a plurality of branch points within the predetermined distance (Y in step S103), the control unit C determines whether or not the distance between the branch points is within a specific distance (step S104). Here, when it is determined that the distance between each branch point is within a specific distance (Y in step S104), the control unit C uses the reference position determination unit 14 as a plurality of related branch points. Specify (step S105). On the other hand, when it is determined that the distance between the branch points is not within a specific distance (N in step S104), the control unit C specifies a plurality of branch points as separate guide branch points by the reference position determination unit 14 ( Step S106).

  When the guidance branch point is specified, the control unit C refers to the map information storage unit F2 by the reference position determination unit 14 and stores information on the guidance branch point in the guidance plate information storage unit F4 (step S107).

  When the information about the guidance branch point is stored, the control unit C uses the POI information search unit 15 to identify a travelable road at the guidance branch point (step S108).

  When the advancing road at the guidance branch point is specified, the control unit C executes a guidance POI determination process described later (step S109).

  When the POI-ID indicating the guide POI determined by the guide POI determination process is stored in the guide plate information storage unit F4, the control unit C creates a guide plate by the guide plate creation unit 16 and stores it in the storage unit F ( Step S110). At this time, as for the information stored as the related guide branch points, a single guide plate is created as shown in FIG.

  When the guide plate is created, the control unit C determines whether or not the vehicle has approached the guide branch point within a predetermined distance (step S111). The “predetermined distance” here may be changed according to the moving speed of the vehicle. Moreover, it is good also as a structure which sets the guidance start point for every guidance branch point, and determines whether the vehicle passed the guidance start point.

  When the control unit C determines that the vehicle has approached the guidance branch point within a predetermined distance (Y in step S111), the control unit C performs a process for displaying a guide plate corresponding to the guidance branch point on the display screen ( Step S112).

  FIG. 12 is an explanatory diagram illustrating an example of a display screen when a guide plate is displayed. As shown in FIG. 12, in addition to the map information display area, various areas including a guide plate display area 201 and a current address display area 202 are provided on the display screen. In addition, in order to increase the discrimination power of the guide branch point A1 corresponding to the guide plate displayed in the guide plate display area 201, the icon can be distinguished from other branch points, The correspondence may be indicated by an instruction line.

  As another form of the guide plate, for example, as shown in FIG. 13, a list 301 of names of facilities and the like that will be headed when a vehicle travels on a travelable road for each travelable road at a guidance branch point A1. It is good also as a structure which displays -303. In this case, in order to clarify the correspondence relationship between the list and the travelable road, for example, the travelable road corresponding to each of the name lists 301 to 303 such as facilities may be indicated by an instruction line or highlighted display. By adopting such a configuration, it is possible to prevent the visibility from being lowered even when there is a road having a special shape. Also, the user is not confused when the guide plate is unintentionally displayed.

  Furthermore, it is good also as a structure which displays the distance from a guidance branch point to each guidance target object as another form of a guidance plate. In this case, the control unit C calculates and stores the distance from the guidance intersection to the guidance object indicated by the POI information by the route search unit 11 in response to the POI information being stored in the guidance plate information storage unit F4. What is necessary is just to be the structure to do.

  The names of facilities and the like displayed on the guide plate may be displayed side by side in the order of distance from the guidance branch point, or the display priority setting may be received by the user in advance.

  Moreover, it is good also as a structure which changes a display form of a guidance plate according to the positional relationship of each POI information, etc., and a user is easy to recognize intuitively. That is, for example, the character size of the name indicating the facility may be reduced as the distance from the guidance branch point decreases, or the character spacing may be reduced. If the facility name drawing start position on the guide plate is, for example, a guide plate in the right direction when viewed from the current position of the vehicle, the facility name display area on the guide plate is located at a position close to the guidance branch point or the vehicle. It is good also as a structure which draws the thing which exists in a far position from the left side from the left side, and the name of the facility to perform from the right side. That is, in the facility name display area on the guide plate, the facility name may be displayed so that it can be easily recognized which facility is close to the current position depending on the display position of the facility name.

  In addition, with the guide plate shape based on the traveling direction of the vehicle, for example, the guide plate that guides facilities located in the straight direction is trapezoidal, and the guide plate that guides facilities located in the left-right direction is a parallelogram, A trapezoidal shape in which one of the left and right sides is perpendicular to the bottom may be used.

  When the guide plate is displayed, the control unit C determines whether or not the vehicle has passed the guide branch point (step S113). If it determines with the vehicle having passed the guidance branch point (Y of step S113), the control part C will perform the process for displaying a preference information reception screen on a display screen (step S114).

  FIG. 14 is an explanatory diagram illustrating an example of a preference information reception screen. As illustrated in FIG. 14, the preference information reception screen includes various areas including a preference information reception button display area 401 including a Yes button 402 and a No button 403.

  When the preference information reception screen is displayed, the control unit C receives the user's evaluation for the displayed guide plate (step S115). Here, for example, when accepting that the Yes button 402 is pressed by the user's finger, the control unit C deletes the guide plate from the display screen by the POI information guide unit 17 (step S116), and the deleted guide plate exists. The information, the user's evaluation, and the guidance time are stored in the guidance history information storage unit F5 and the preference information storage unit F7, the guidance history information is updated (step S117), and the process proceeds to step S101. If the user's evaluation is not received within a predetermined time after the preference information reception screen is displayed in step S115, the control unit C transitions to step S116 on the assumption that the user's evaluation has not been received. In this case, only the guidance history information may be updated in step S117. That is, it is good also as a structure which updates the frequency | count of guidance in preference information, and its related information, only when a user evaluation is received.

  On the other hand, when it is determined that the vehicle has not approached the guidance branch point within a predetermined distance (N in step S111), the control unit C determines whether or not the road section on which the vehicle is traveling has been changed. (Step S118). If it is determined that the traveling road section has not been changed (N in step S118), the control unit C transitions to step S111. If it is determined that the traveling road section has been changed (Y in step S118), the control unit C transitions to step S101 to identify the road section in which the vehicle is traveling. The guide plate already created at this time may be configured to delete the information, or may be stored as guide history information in a state that can be distinguished from the guide plate displayed once on the display screen. Good.

  Next, guidance POI determination processing executed by the navigation device 10 will be described.

  FIG. 15 is a flowchart illustrating an example of the guidance POI determination process. In the guidance POI determination process, a predetermined number (three in this example) of the POI information searched by the POI information search unit 15 that meets the user's preference is selected and determined as the guidance POI information. The process is executed. Note that the number to be displayed can be set by the user, and the setting timing may be before the POI information search or after the search. Further, for example, as shown in FIG. 13, the POI information may be guided in a predetermined number (three in FIG. 13) for each travelable road at the guidance branch point A1, or may be guided at a time. The number of POI information to be performed may be limited to a preset number.

  In the guidance POI determination process, first, the control unit C uses the POI information search unit 15 to determine the POI information search range within a predetermined range from the specified travelable road (step S201).

  When the search range is determined, the control unit C uses the POI information search unit 15 to search for POI information indicating the guidance object existing within the determined search range, and the searched POI information is stored in the guide POI information storage unit F5. Store (step S202).

  When the retrieved POI information is stored, the control unit C groups the stored POI information for each genre (step S203). At this time, the control unit C sets a group number in the POI information included in each group according to the display priority predetermined for each genre. In this example, the group number “1” is set in the POI information included in the group having the highest display priority, and the group numbers are sequentially set thereafter.

  Note that the grouping method may be configured to group based on, for example, a genre selected in advance by the user, or may be configured to group based on the presence or absence of advertisements and articles, the ranking evaluation range, and the like. Further, the display priority may be calculated using various information of POI information belonging to each group as a parameter (for example, the display priority is increased for a group including a lot of POI information having a high ranking). Moreover, you may comprise the user's preference as a display priority determination method. In this case, for example, a configuration in which a display priority setting for a genre, a keyword, or the like is directly received by the user may be adopted. Further, referring to the preference information storage part F7, a configuration in which higher display priority is set for POI information in which the same feature information as the feature information of the POI information for which the user has set a high evaluation is detected. Good.

  When the POI information is grouped and stored, the control unit C refers to the guidance POI information storage unit F6 by the score calculation / giving unit 19, and among the groups including the POI information to which no personal score is given, the display priority is The highest group is extracted (step S204).

  When the group is extracted, the control unit C refers to the preference information storage unit F7 by the score calculation / giving unit 19, and assigns a personal score to each POI information constituting the group based on the user's preference information (step S205). . In this example, the numerical value indicating the number of times the feature information of each POI information appears in the feature information of the POI information stored in the preference information storage unit F7 and the total number of searches by the user is a certain value or more. In this case, 1 point is given as a personal score.

  When the personal score is given to the POI information included in the extracted group, the control unit C determines whether or not the personal score is given to the predetermined number of POI information by the score calculation / giving unit 19 (step S206). Here, if it is determined that a personal score is not given to the predetermined number of POI information (N in step S206), the control unit C transitions to step S204.

  On the other hand, if it is determined that a personal score has been assigned to a predetermined number of POI information (Y in step S206), the control unit C refers to the POI information storage unit F3 by the score calculation / giving unit 19, and the ranking is set. In this case, a ranking score corresponding to the set ranking is calculated and given (step S207).

  When the ranking score is given, the control unit C acquires the current position information by the own vehicle position information receiving unit 12, and based on the acquired current position and the current time (including season and date), the score calculation giving unit 19 The TPO score to be assigned to each POI information is calculated and assigned (step S208). In this example, the control unit C calculates the estimated arrival time to the guidance object indicated by each POI information from the current position by the route search unit 11, and the calculated estimated time is within the recommended time in the POI information. In this case, 1 point is given as a TPO score.

  When the TPO score is given, the control unit C calculates the POI provisional score by the score calculation giving unit 19 (step S209). The POI provisional score in this example is a total value of the personal score, the ranking score, and the TPO score.

  When the POI provisional score is calculated, the control unit C refers to the guide POI information storage unit F6 by the guide POI selection unit 20, and sets the upper limit number of guide POI candidates as the upper limit from the POI information. Information to be guide POI candidate information is selected (step S210). At this time, a high POI provisional score is selected with priority.

  When the guide POI candidate information is selected, the control unit C causes the guide POI selection unit 20 to select three pieces of guide POI candidate information and store them in the storage unit F (step S211).

  When the guide POI candidate information is selected, the control unit C causes the route search unit 11 to calculate the positional relationship value between the guide objects indicated by the selected guide POI candidate information (step S212). When the positional relationship value between the guidance objects is calculated, the control unit C calculates the positional relationship score according to the calculated positional relationship value by the score calculation giving unit 19 (step S213). The positional relationship value in this example is information including the distance and angle between the guidance objects indicated by the three selected POI information. The positional relationship value represents the degree of distance variation and directional variation between the guidance objects, and by determining the degree of variation, more effective selection (that is, POI in consideration of the positional relationship between the guidance objects). Information selection). Here, “distance variation” is a concept for determining that the positional relationship is more distant (varied) as the distance between the guidance objects increases in the combination of the guidance objects to be determined. . In addition, “directional variation” means that in a combination of guidance objects to be determined, the positional relationship increases as the direction in which another guidance object is located as viewed from one guidance object increases. It is a concept that determines that the That is, when determining “directional variation”, the distance between the guidance objects is not considered. For example, when the total distance between the guidance objects indicated by the three POI information is longer than a reference provided in advance, it is determined that the guidance objects exist in terms of distance. In addition, when the smallest angle (hereinafter referred to as “minimum angle”) among the three angles formed when the positions of the guide objects indicated by the three POI information are connected by straight lines, the three POI information is small. Are determined to be in substantially the same direction (that is, it is determined that there is no variation in direction). In this example, the route search unit 11 determines the distance and angle between the guidance objects from the latitude / longitude indicating the position of each guidance object (from the angle formed by the length of the side of the triangle with the three POI points as vertices). (Minimum angle) is calculated, and a positional relationship score table (for example, as shown in FIG. 16, the calculated positional relationship value (distance and minimum) is stored in advance according to the positional relationship value between the guidance objects. A table that sets the position relationship score corresponding to (angle): the distance lower reference is set to 1 km, the distance upper reference is set to 3 km, and the angle judgment reference is set to 5 degrees, and the position is determined according to the distance variation and the direction variation. The relationship score is assigned from minus 1 to 2. When selecting POI information that varies (both distance and direction), the position score is as shown in FIG. Not loose (ie distance When selecting POI information (both directional), the positional relationship score is as shown in Fig. 16 (B) Note that the distance lower reference, the distance upper reference, and the angle determination reference are based on the POI information. The position relationship score is calculated according to the search range (for example, the wider the POI information search range, the higher the reference value such as the distance lower reference). . In addition, it is good also as a structure which calculates the total movement distance in the case of moving each guidance object by the route search part 11, and calculates a positional relationship score based on the calculated total movement distance.

  When the positional relationship score is calculated, the control unit C determines the similarity value indicating the similarity between each guide POI candidate information by the information similarity determination unit 18 (step S214). In this example, the similarity value is indicated by the number of matching information (eg, genre, place name of the municipality in the address, recommended time, feature information, etc.) common to the selected guide POI candidate information. To do. That is, for example, if the selected three guide POI candidate information has the same genre and there is a period in which recommended times overlap, the similarity value is determined to be “2”.

  When the similarity value is determined, the control unit C calculates a similarity score corresponding to the determined similarity value by the score calculation giving unit 19 (step S215). In this example, the score calculation / giving unit 19 provides reference information indicating the relationship between the similarity value stored in the storage unit F in advance and the similarity score (for example, when similar POI guidance is used, “similar value is“ If the score is “4” or more, the similarity score is minus one point, “3” or “2” is 0 point, “1” or “2” is 1 point, etc.)). .

  When the similar score is calculated, the control unit C calculates the combined total score by the score calculation giving unit 19 (step S216). In this example, the combination total score is a value obtained by adding the positional relationship score and the similar score to the total value of the POI provisional scores of the selected three guide POI candidate information.

  When the combination total points are calculated, the control unit C determines whether or not the guide POI selection unit 20 has calculated combination total points for all combinations in the case of selecting three from a plurality of guide POI candidate information. (Step S217). Here, when it is determined that the combination total points are not calculated for all the combinations (N in Step S217), the control unit C transitions to Step S211.

  On the other hand, if it is determined that the combination total points have been calculated for all combinations (Y in step S217), the control unit C uses the guide POI selection unit 20 to select a combination of guide POI candidate information having the highest combination total points. The guide POI information is determined, and the guide POI information is updated (step S218).

  When the guide POI information is determined, the control unit C causes the guide POI selection unit 20 to store information on the POI information determined as the guide POI information in the guide plate information storage unit F4 (step S219), thereby performing guide plate display processing. The process proceeds to step S110 (see FIG. 10).

  Next, guidance history information display processing executed by the navigation device 10 will be described.

  FIG. 17 is a flowchart illustrating an example of guidance history information display processing. In the guidance history information display process, a process for re-reading POI information for which guidance has ended due to the vehicle passing through the guidance intersection is executed.

  The guidance history information display process in this example is started in response to receiving a user operation via the input device 40, for example.

  In the guidance history information display process, first, the control unit C receives an input of guidance history information display conditions by, for example, displaying a display condition input screen on the display screen (step S301). Here, as the display condition, for example, a condition with a content such as “display POI information corresponding to the facility name displayed by the guide plate before several hours” is accepted. In addition, it is good also as a structure which lists and displays a part of POI information corresponding to all the facility names displayed in the past, without accepting display conditions.

  When the display condition of the guidance history information is received (Y in step S301), the control unit C refers to the guidance history information storage unit F5 and performs a process of extracting the guidance history information that satisfies the received display condition (step S302). ).

  When the guidance history information is extracted, the control unit C displays a POI information list screen (for example, a name list screen) indicated by the POI-ID in the guidance history information among the POI information stored in the POI information storage unit F3. For this purpose (step S303).

  When the POI information list screen is displayed, the control unit C determines whether there is POI information indicating a facility located on the map displayed on the display screen (step S304).

  If it is determined that there is POI information indicating a facility located on the displayed map (Y in step S304), the control unit C displays an instruction line from the position corresponding to the POI information, and the name of the facility An icon is displayed (step S305), and the process here ends.

  As described above, in the above-described embodiment, the current position of a moving object (for example, a user or a vehicle) is displayed on the map on the display screen of the display device (for example, the image display apparatus 31), and the moving object is displayed at the destination. The navigation device 10 that guides to the map stores the map information storage unit F2 that stores the map information including the road information, and the POI information including the guidance target object specifying information (for example, the facility name) indicating the guidance target object (for example, the facility). Preference information for storing preference information including the POI information storage unit F3, the evaluation (for example, user evaluation) for the POI information, and information indicating the time and place when the guidance object specifying information is displayed on the display screen And a storage unit F7, detects the current position of the moving body, determines a reference position (for example, the current position, a front intersection, etc.) based on the detected current position, and is determined POI information indicating guidance objects existing within a predetermined range from the reference position is searched, and when there are a plurality of searched POI information, a positional relationship value between the guidance objects indicated by the plurality of POI information is calculated. The similarity value indicating the similarity between the POI information is determined and displayed on the display screen from the retrieved POI information based on the preference information, the positional relationship value between the guidance objects, and the similarity value. POI information including guidance target object specifying information is selected, and guidance information (for example, a guide plate) including guidance target object specifying information included in the selected POI information is viewed from the reference position as the position where the guidance target object exists. Is displayed on the display screen so as to be identifiable, the presence of guidance objects (for example, facilities) around the moving body (for example, user, vehicle) is positively and appropriately determined according to the user's preference. Notification So that it is Rukoto.

  That is, POI information according to the time and the position of the moving body can be actively introduced to the user without the user operating the navigation device to search for facilities or the like. For this reason, information can be acquired without a troublesome operation for the user, and convenience is improved because it is not necessary to overlook the existence of a facility or the like that suits one's preference. On the other hand, information providers such as companies can actively present facilities that could not be displayed unless they have been searched so far, so that the content characteristics of information providers according to the time and taste can be utilized. Therefore, convenience is improved.

  In addition, it is possible to guide the user in which direction the guidance object is located as viewed from the reference position, and among the guidance objects (for example, facilities) existing around the mobile body, the user's The presence of the guidance target object according to the preference can be notified more appropriately.

  Moreover, in embodiment mentioned above, the navigation apparatus 10 receives the user's evaluation with respect to the guidance information (for example, guidance plate) displayed on the display screen, and updates preference information according to having received the user's evaluation. Therefore, the user's evaluation can be received by a simple operation and can be used when the guidance information is displayed next time. Moreover, since preference can be acquired without imposing an excessive burden on the user, the user's preference can be acquired in the long term, and highly accurate preference information can be acquired. . In the above-described embodiment, the case where there are three types of evaluation with respect to the guidance information (Yes and No and no evaluation) has been described as an example. However, a more detailed evaluation may be accepted or a text input may be accepted. It is good.

  In the embodiment described above, the navigation device 10 sets the display priority in the POI information based on a preset criterion (for example, sets the display priority by grouping), and sets the display priority to the set display priority. Since the selection target is limited accordingly, even when there are a lot of searched POI information, it is possible to reduce the burden on the search processing.

  Further, in the above-described embodiment, the combination of POI information for all the combinations of POI information when the navigation apparatus 10 extracts a predetermined number (for example, three) of POI information from the searched POI information. The positional relation value between the guidance objects to be shown is calculated, and the positional relation value between the guidance objects calculated from the retrieved POI information (for example, the positional relation according to the calculated positional relation value) By adopting a configuration in which the combination of the POI information is selected (in consideration of the score), it is possible to prevent the location where guidance is provided from being biased.

  In the above-described embodiment, the combined POI information for all combinations of POI information when the navigation device 10 extracts a specific number (for example, three) of POI information from the searched POI information. A similarity value between them is determined, and a combination of the POI information is selected from the retrieved POI information according to the determined similarity value (for example, considering a similarity score corresponding to the determined similarity) By adopting the configuration, it is possible to prevent the content to be guided from being biased.

  Although not particularly mentioned in the above-described embodiment, the map information stored in the map information storage unit F2 includes road information in which a plurality of types are set for roads and branch points, respectively. Whether or not the current position of the moving body is on a specific road (for example, on a highway) with reference to the current position and road information of the moving body received by the vehicle position information receiving section 13 If it is on a specific road, a branch point (for example, an exit of an expressway) in which a type corresponding to the specific road type is set may be determined as a reference position. As a result, for example, when the moving body is traveling on an expressway, it is possible to guide facilities and the like existing along the general road when getting off at the next interchange.

  Although not particularly mentioned in the above-described embodiment, the navigation device 10 includes a guidance prohibition condition storage unit that stores the guidance prohibition condition of the POI information, and searches for POI information other than the POI information that satisfies the guidance prohibition condition. The search result may be displayed on the display screen. The guidance prohibition condition may be set in advance or may be set according to an instruction from the user. In this case, guidance prohibition conditions set according to an instruction from the user include, for example, POI information of a guidance object located within a predetermined range centered on the home, and guidance where the distance from the home is within a predetermined distance. POI information of the object, POI information of the guidance object located in the administrative district of the municipality including the home, POI of the guidance object located in the administrative boundary and the designated road section adjacent to the administrative division of the home Information can be considered. By adopting such a configuration, it is possible to avoid giving the user an unpleasant feeling such as annoyance by performing facility guidance on a land that the user is familiar with, such as around the user's home. become.

  Although not specifically mentioned in the above-described embodiment, the user may select a facility name after displaying a guide plate and display detailed information regarding the facility indicated by the received facility name. . In this case, for example, during the display of the guide plate, the control unit C accepts the pressing of the name of the facility displayed on the guide plate by the user, searches for POI information corresponding to the received facility name, and displays the image, address, Time, regular holidays, menus, evaluation information, introduction text, etc. may be displayed on the display screen as detailed information. With such a configuration, the user's stress is reduced because no character string is input in the search menu. In addition, since detailed information can be obtained without much time and effort, the opportunity to access the POI information that is of interest increases.

  Although not particularly mentioned in the above-described embodiment, when a position other than a branch point such as the current position of the vehicle is determined as the reference position, the POI information search range is, for example, as shown in FIG. The configuration may be such that the current position P of the vehicle is used as a reference and the distance and angle range are determined. In FIG. 18, the search range is divided into three in the front and left and right directions based on the current position of the vehicle. However, the search range is not limited to this. The configuration may be included in the range, or the search range may be further divided.

  Further, in this case, the display form of the guide plate may be displayed in such a form as to face up when viewed from the current position of the vehicle, for example, as shown in FIG. 501-503).

  Regardless of the presence or absence of a branch point, the POI information indicating the facilities existing along the road between the road on which the vehicle is traveling and the expected travel road predicted from the traveling direction is searched, and the search result is displayed. Also good. In this case, the genre of the POI information to be displayed may be limited, or the search results to be displayed may be arranged in an order according to the user's desire. In addition, the condition for determining “along the road” here is that it can be accessed immediately from the target road, or that it exists in a belt-like range at a specific distance centering on the target road. It can be considered to be.

  Although not specifically mentioned in the above-described embodiment, the score calculation / giving unit 19 calculates the score in detail by using a specific mathematical expression that uses information that is characteristic of each score as a parameter to calculate each score. It is good also as a structure to calculate. Moreover, it is good also as a structure which weights with respect to the various information which affects a total POI provisional score. That is, even if the personal score or ranking score is high, if the current time is outside business hours, the possibility of being selected as guidance POI information is reduced by setting the TPO score to an extremely low negative number. By adopting such a configuration, POI information that is presumed to meet the user's preference from the preference information and ranking information, the current position and time, the positional relationship between the guidance objects, the similarity of the guidance POI candidate information, etc. The user can be selected and guided to the user.

<Second Embodiment>
Further, in the second embodiment, the control unit C refers to the preference information storage unit F7 by the score calculation / giving unit 19, and gives a personal score to each POI information constituting the group based on the user's preference information. Sometimes (see step S205 in FIG. 15), collaborative filtering can be used. That is, it differs from the first embodiment in that collaborative filtering is considered.

  In other embodiments described below, the description will focus on parts that are different from the first embodiment described above. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted, and the same components are assumed unless otherwise described. Note that the components described here include the processing operation of the navigation device 10 in this example, and description of the same processing as in the example of the first embodiment may be omitted.

  FIG. 20 is a schematic diagram showing an example of the configuration of the navigation system 101 according to the second embodiment of the present invention. As shown in FIG. 20, the navigation system 101 includes a management server 60 and a plurality of navigation devices 10 to 1N. The management server 60 and the plurality of navigation devices 10 to 1N are connected by a communication network 70 such as the Internet. FIG. 20 shows a case where each component is one, but the navigation system 101 may include, for example, a plurality of management servers.

  The navigation device 10 further includes an external communication unit 21 having a function for accessing the management server 60 and transmitting / receiving information. In addition, it is assumed that a user ID for accessing the management server 60 is stored in the storage unit F.

  The management server 60 is a server managed by a system administrator of the navigation system 101, for example, and is configured by an information processing apparatus such as a WWW server. The management server 60 includes various DBs including a preference information management DB (database) 61 that manages preference information of a plurality of users in association with user IDs. The management server 60 manages various types of information stored in each DB, and includes various types of functions that provide services using collaborative filtering and the like by collecting user preference information using the plurality of navigation devices 10 to 1N. It has the function of. In addition, as a method of aggregating the preference information of the users who use the plurality of navigation devices 10 to 1N, a configuration in which preference information is input by the user may be accepted. The navigation device 10 may transmit the preference information stored in the preference information storage unit F7 to the management server 60 when the user accesses the management server 60.

  Here, collaborative filtering is used to store preference information of a plurality of users, and to provide information that is presumed to be preferred by a certain user using information of other users who have similar preferences to that of a certain user. This is a known technique. In addition, as a method of providing information to the navigation device 10, there are a method of communicating via the communication network 70, a method of storing information in a portable memory such as a memory card or a USB memory that can be attached to the navigation device 10, and the like. Conceivable.

Hereinafter, an example of the operation of the navigation device 10 in the present embodiment will be described.
FIG. 21 is a flowchart illustrating an example of guidance POI determination processing executed by the navigation device 10. In this example, a modified example of the process executed in step S205 of the guidance POI determination process in the first example will be described.

  When the control unit C of the navigation apparatus 10 extracts the group having the highest display priority from the groups including POI information to which no personal score is assigned (see step S204 in FIG. 15), the external communication unit 21 causes the user to The ID and the retrieved POI information (see step S202 in FIG. 15) are transmitted to the management server 60 (step S205a).

  When receiving the user ID and the retrieved POI information (step S401), the management server 60 refers to the preference information DB (step S402) and associates preference information similar to the preference information corresponding to the received user ID. The obtained user ID (hereinafter referred to as “similar user”) is extracted (step S403).

  When a similar user is extracted, the management server 60 sets a good evaluation for the similar user in the retrieved POI information (for example, an evaluation of 8 or more when the evaluation is expressed in 10 levels). It is determined whether there is the same POI information that is present (step S404). At this time, if it is determined that there is POI information that is evaluated well by a similar user, the management server 60 stores information indicating the POI information as a determination result.

  When the determination is finished, the management server 60 transmits the determination result to the navigation device 10 (step S405).

  When the determination result is received (step S205b), the control unit C of the navigation device 10 assigns a personal score to the POI information that is evaluated well by the similar user based on a predetermined criterion (step S205c), and then proceeds to step S206. Transition.

  As described above, in the present embodiment, the current position of a moving object (for example, a user or a vehicle) on the map on the display screen of the information management server (for example, the management server 60) and the display device (for example, the image display device 31). In the navigation system 101 that communicates via the communication network 70 with the navigation device 10 that displays the mobile body to the destination, the navigation device 10 stores the map information including road information. A POI information storage unit F3 for storing POI information including guidance object specifying information (for example, facility name) indicating a guidance object (for example, a facility), evaluation (for example, user evaluation) for POI information, and guidance object Preference information for storing preference information including information indicating time and place when specific information is displayed on the display screen A memory unit F7, and a guide POI information storage unit F6 that stores guide information in which the searched POI information and points (for example, various scores calculated and given in the guide POI determination process) are associated with each other; A current position of the moving object is detected, a reference position (for example, the current position, a front intersection, etc.) is determined based on the detected current position, and a guide object existing within a predetermined range from the determined reference position is indicated. POI information is searched, and when there are a plurality of searched POI information, the positional relationship value between the guidance objects indicated by the plurality of POI information is calculated, and the similarity value indicating the similarity between the plurality of POI information is determined. And POI information transmitting means for transmitting the retrieved POI information to the information management server, and server information receiving means for receiving information transmitted from the information management server. A user information management DB (for example, preference information management DB 61) for acquiring and managing user information including preference information from the navigation devices 10 to 1N is provided, and one of the plurality of navigation devices 10 to 1N (for example, the navigation device 10) is provided. The received POI information is received, the managed preference information is referred to in response to the reception of the POI information, and the preference information corresponding to one of the plurality of navigation devices 10 to 1N (for example, the navigation device 10). The user information (that is, the user) in which the preference information similar to that of the user is set is identified, the preference information included in the identified user information is referred to, and the evaluation of the user is based on the predetermined standard in the received POI information. It is determined whether or not the POI information set to a higher value is included, and the determination results are displayed as a plurality of navigation devices 10-1. N (for example, the navigation device 10), the navigation device 10 stores the stored preference information, the calculated positional relationship value between the guidance objects, the determined similarity value, and the received said Based on the determination result, the stored guidance POI information is updated (for example, various points are given), and the POI information having a higher corresponding point is preferentially selected from the stored POI information. Configuration that displays guidance information (for example, a guidance plate) including guidance object specifying information included in the POI information on a display screen so that it can be identified in which direction the position where the guidance object exists is viewed from the reference position Therefore, it is possible to accurately notify information that meets the user's preference.

In the second embodiment described above, a personal score is assigned to a POI information that is evaluated well by a similar user according to a predetermined criterion. However, determination of POI information to which a personal score is given is determined. The method only needs to use preference information of similar users,
For example, the management server 60 extracts feature information (for example, a keyword) indicating the preference of the similar user from the preference information of the similar user, and gives (or adds) personal points to the POI information including the extracted feature information. It is good also as a structure.

  INDUSTRIAL APPLICABILITY The present invention is industrially useful in an industry that handles devices that provide vehicle route guidance, and is also useful in the electrical appliance market such as a car navigation device that can display an electronic map.

F1 Guide route information storage unit F2 Map information storage unit
F3 POI information storage unit F4 Guide plate information storage unit F5 Guide history information storage unit F6 Guide POI information storage unit F7 Preference information storage unit 10 Navigation device 11 Route search unit 12 Own vehicle position information reception unit 13 Direction information reception unit 14 Reference position Determination unit 15 POI information search unit 16 Guide plate creation unit 17 POI information guide unit 18 Information similarity determination unit 19 Score calculation assigning unit 20 Guide POI selection unit 30 Output device 31 Image display device 32 Audio output device 40 Input device 50 Own vehicle Positioning device 60 Management server 70 Communication network 100 Route guidance system 101 Navigation system

Claims (6)

A navigation device that displays a current position of a moving object on a map on a display screen of a display device and guides the moving object to a destination,
Map information storage means for storing map information including road information;
POI information storage means for storing POI information including guidance object specifying information indicating a guidance object;
Preference information storage means for storing preference information including evaluation on the POI information and information indicating the time and place when the guidance object specifying information is displayed on the display screen;
Position detecting means for detecting a current position of the moving body;
Reference position determining means for determining a reference position based on the current position detected by the position detecting means;
POI information search means for searching for POI information indicating a guide object existing within a predetermined range from the reference position determined by the reference position determination means;
A positional relationship value calculating unit that calculates a positional relationship value between guidance objects indicated by the plurality of POI information when there are a plurality of POI information searched by the POI information searching unit;
Similarity value determination means for determining a similarity value indicating similarity between the plurality of POI information;
Based on the preference information stored in the preference information storage unit, the positional relationship value between the guidance objects calculated by the positional relationship value calculation unit, and the similarity value determined by the similarity value determination unit. POI information selection means for selecting POI information including guidance object specifying information to be displayed on the display screen from the POI information searched by the POI information search means;
The guidance information including the guidance object specifying information included in the POI information selected by the POI information selection means can be identified in which direction the position where the guidance object exists is viewed from the reference position. A navigation apparatus comprising: guidance information display means for displaying on the display screen. The positional relationship value calculation means is a guidance object indicated by the combination of POI information for all combinations of POI information when a predetermined number of POI information is extracted from the POI information searched by the POI information search means. Calculate the positional relationship value between
The POI information selection means selects a combination of the POI information from the POI information searched by the POI information search means according to the positional relation value between the guidance objects calculated by the positional relation value calculation means. The navigation device according to claim 1. The similarity value determination means calculates the similarity value between the combined POI information for all combinations of POI information when a specific number of POI information is extracted from the POI information searched by the POI information search means. Judgment,
The POI information selection means selects the combination of the POI information according to the similarity value determined by the similarity value determination means from the POI information searched by the POI information search means. 3. The navigation device according to 2. A navigation system in which an information management server and a navigation device that displays a current position of a moving body on a map on a display screen of a display device and guides the moving body to a destination communicate via a communication network,
The navigation device
Map information storage means for storing map information including road information;
POI information storage means for storing POI information including guidance object specifying information indicating a guidance object;
Preference information storage means for storing preference information including evaluation on the POI information and information indicating the time and place when the guidance object specifying information is displayed on the display screen;
Position detecting means for detecting a current position of the moving body;
Reference position determining means for determining a reference position based on the current position detected by the position detecting means;
POI information search means for searching for POI information indicating a guide object existing within a predetermined range from the reference position determined by the reference position determination means;
Guidance POI information storage means for storing guidance POI information in which the POI information retrieved by the POI information retrieval means is associated with points;
A positional relationship value calculating means for calculating a positional relationship between the guidance objects indicated by the plurality of POI information when there are a plurality of POI information retrieved by the POI information retrieval processing;
Similarity value determination means for determining a similarity value indicating similarity between the plurality of POI information;
POI information transmission means for transmitting the POI information retrieved by the POI information retrieval means to the information management server;
Server information receiving means for receiving information transmitted from the information management server,
The information management server
User information management means for acquiring and managing user information including the preference information from a plurality of the navigation devices;
POI information receiving means for receiving POI information transmitted from one of the plurality of navigation devices by the POI information transmitting means;
In response to the POI information receiving means receiving the POI information, the preference information managed by the user information management means is referred to, and the preference information corresponding to one of the plurality of navigation devices and Similar user information specifying means for specifying user information for which similar preference information is set;
A POI in which the user's evaluation is set higher than a predetermined standard in the POI information received by the receiving means with reference to the preference information included in the user information specified by the similar user information specifying means Evaluation judging means for judging whether or not information is included;
Determination result transmission means for transmitting a determination result by the evaluation determination means to one of the plurality of navigation devices,
The navigation device further includes:
The preference information stored in the preference information storage means, the positional relation value between the guidance objects calculated by the positional relation value calculation means, the similarity value determined by the similarity value determination means, and the server Guide POI information updating means for updating the guide POI information stored in the guide POI information storage means based on the determination result received by the information receiving means;
POI information selection means for preferentially selecting POI information having a high corresponding point from the POI information stored in the guidance POI information storage means;
The guidance information including the guidance object specifying information included in the POI information selected by the POI information selection means can be identified in which direction the position where the guidance object exists is viewed from the reference position. A navigation information display means for displaying on the display screen. The evaluation determination means includes feature information extraction means for extracting feature information indicating a user's preference from the preference information,
The navigation system according to claim 4, wherein the guidance POI information update unit updates the point with respect to POI information including the feature information extracted by the feature information extraction unit. A navigation program for controlling the operation of a navigation device to display a current position of a moving body on a map on a display screen of a display device and to guide the moving body to a destination,
In the navigation device,
A position detection process for detecting a current position of the moving body;
A reference position determination process for determining a reference position based on the current position detected in the position detection process;
POI information search processing for searching for POI information indicating a guidance object existing within a predetermined range from the reference position determined in the reference position determination processing;
A positional relationship value calculation process for calculating a positional relationship value between the guidance objects indicated by the plurality of POI information when there are a plurality of the POI information retrieved by the POI information retrieval process;
A similarity value determination process for determining a similarity value indicating similarity between the plurality of POI information;
Evaluation of the POI information stored in the POI information storage means for storing the POI information including the guidance object specifying information indicating the guidance object, and the time when the guidance object specifying information is displayed on the display screen And preference information stored by preference information storage means for storing preference information including information indicating the location, the positional relationship value between the guidance objects calculated in the positional relationship value calculation process, and Based on the similarity value determined in the similarity value determination process, POI information for selecting POI information including guidance object specifying information to be displayed on the display screen from the POI information searched in the POI information search process. Information selection processing,
The guidance information including the guidance object specifying information included in the POI information selected by the POI information selection process can be identified in which direction the position where the guidance object exists is viewed from the reference position. A navigation program for executing guidance information display processing displayed on the display screen.

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