JP2014159996A - Navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation device capable of setting a route corresponding to a user's desire to stop by places.SOLUTION: A navigation device includes: a destination determination unit 521 for determining a destination of a route guidance; an importance determination unit 522 for determining an importance of the destination determined by the destination determination unit; a desire degree determination unit 523 for determining a degree of a user's stopping-by desire in response to the importance of the destination in such a manner that the user's desire to stop by places until reaching the destination becomes higher when the importance of the destination is low in comparison with a case that the importance is high; and a route setting unit 524 for setting a route to the destination by changing the easiness to stop by according to the determined stopping-by desire degree. When the destination is not important, a route, which allows the user to easily stop by before reaching the destination, is set, so that the route meets his/her desire to stop by various places. When the destination is important, a route to directly go to the destination is set and therefore in this case also the route meets the user's desire not to stop by on the way.

Description

  The present invention relates to a navigation device, and more particularly to a technique for setting a route to a destination.

  You may stop by when you are traveling to your destination. Therefore, various techniques for proposing a stop-by place while traveling to a destination have been proposed (for example, Patent Document 1).

  In Patent Document 1, when there is a margin before the arrival time at the destination, a route that can arrive at the destination by the arrival time via the detour spot is presented.

JP 2003-139553 A

  Even though the situation is the same in that the vehicle is traveling toward the destination, the desire for the user to drop in on the way varies depending on the destination. In patent document 1, when there is a margin in the arrival time of the destination, a route passing through the stop spot is presented, but depending on the destination, it may be desired to arrive at the destination as soon as possible and use the time at the destination. is there. On the other hand, it is not so important to reach the destination at the scheduled time, and if there is a good stopover, the time may be used at the stopover.

  Therefore, as in Patent Document 1, a technique for presenting a route that passes through a stop spot according to a margin until the arrival time is not necessarily a route that matches the user's drop-in desire.

  The present invention has been made based on this situation, and an object of the present invention is to provide a navigation device that can set a route that meets the user's desire to drop in.

  The present invention for achieving the object includes a destination determining unit (521, S1) for determining a destination for route guidance, and an importance determining unit for determining the importance of the destination determined by the destination determining unit. (522, S2 to S4) and according to the importance of the destination so that when the importance is low, the user's drop-in desire to go to the destination is higher than when the importance is high A desire degree determination unit (523, S5) that determines a drop-in desire level, and a route setting unit (524, S6) that sets the route to the destination by changing the ease of dropping according to the determined drop-in desire level. ) Including a navigation device.

  According to the present invention, when the destination is not so important, the drop-in desire is increased, and conversely, when the destination is important, the drop-in desire is reduced, and according to the drop-in desire Change the ease of stopping and set the route to the destination. As a result, when the destination is not important, a route that is easy to stop by before reaching the destination is set, so that the route meets the desire for various stops. In addition, when the destination is important, a route that goes directly to the destination is set, and in this case, too, the route meets the desire of the user who does not want to stop on the way.

1 is a configuration diagram of a vehicle navigation device 1. FIG. It is a flowchart which shows the process of the guidance preparation part 52 of FIG. It is a drop-in desire line used when the destination is important. This is a drop-in desire line used when the importance of the destination is low. 4 is a drop-in desire level line used when the importance of the destination is low, which is another example different from FIG. This is a drop-in desire degree line used when the destination is important, different from FIG. It is an example of the path | route set by step S6 of FIG. It is an example of the path | route set by step S6 of FIG. It is a recommendation frequency curve which determines the recommendation frequency of a stop-in place.

(Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Hardware configuration)
A vehicle navigation apparatus 1 shown in FIG. 1 includes a storage unit 10, a display unit 20, a GPS receiver 30, an input unit 40, and a navigation ECU 50.

  The storage unit 10 stores road map data. The road map data includes various information related to facilities in addition to nodes and links indicating road shapes. The storage unit 10 also stores a plurality of drop-in desire lines (FIGS. 3 to 6) and a recommendation frequency line (FIG. 9), which will be described in detail later.

  A road map is displayed on the display unit 20. In addition, an entire route from the departure point to the destination, a destination setting screen, a stopover proposal screen, and the like are also displayed.

  The GPS receiver 30 receives a signal transmitted from a GPS artificial satellite, and sequentially determines the coordinates of the current position based on the received signal.

  The input unit 40 is, for example, a touch panel superimposed on the display surface of the display unit 20 or a mechanical switch disposed around the display unit 20. The input unit 40 is operated by the user when setting a destination.

  The navigation ECU 50 is a computer having a CPU, a ROM, a RAM, and the like inside (not shown), and the CPU executes a program stored in the ROM while using a temporary storage function of the RAM, thereby the storage unit 10. Read / write control and display control of the display unit 20 are performed. In addition, the current position determined by the GPS receiver 30 is sequentially acquired, and various information such as the vehicle speed of the host vehicle is sequentially acquired via the CAN 60.

  In addition to these processing functions, the navigation ECU 50 includes functions as an action history analysis unit 51, a guidance preparation unit 52, and a guidance execution unit 53. The contents of these units 51, 52, and 53 will be described in detail below.

(Behavior history analysis unit 51)
The behavior history analysis unit 51 performs a process of acquiring a behavior history of a user and analyzing a tendency (hereinafter referred to as a “trend tendency”) about whether or not to drop by user. For example, the user is identified by inputting a user name from the input unit 40. Further, the vehicle navigation apparatus 1 may be provided with various biometric authentication devices (face authentication, finger vein authentication, etc.), and individual identification may be performed using the biometric authentication device. Moreover, since there are many users who drive the same vehicle or one main user in many cases, it may be considered that the user with respect to each vehicle navigation apparatus 1 is one. The action history is acquired for each individual thus identified. The action history is a movement history of a vehicle on which the vehicle navigation device 1 is mounted. The movement history also includes information for distinguishing whether the movement is when the destination is set or whether the movement is when the destination is not set. The acquired action history is sequentially stored in the storage unit 10.

  Then, the behavior history analysis unit 51 analyzes the behavior history, and whether the user's tendency to stop by when the destination is set tends to go straight to the destination or whether there is a lot of stops on the way Is analyzed. This tendency is grasped by the drop-in probability. The drop-in probability is calculated with the total number of route guidances as the denominator, of which the number of stops has been calculated as the numerator. Note that the total number of calculation periods may be limited to a certain past period from the present time.

  The decision to stop by is made by having parked before arriving at the destination. However, if it can be determined that the parked point is just a resting point (convenience store, service area, parking area, etc.), it is not determined that a stop has been made here.

  In addition, the tendency to drop in often differs between going and returning. There are those who tend to go straight to their homes, and on the other hand, there are those who return while visiting various places. Therefore, in the present embodiment, the tendency to stop by is distinguished from going and returning. Whether it is going or returning is determined by whether the departure place is at home or, on the contrary, the destination is at home. Since it is often the case that the vehicle heads from the point A that is not home to the point B, it is possible to go all the way except when the destination is home. Note that the determination that the destination is at home is made based on whether or not the destination is a point registered as home. However, in consideration of the case where the base of life is temporarily changed from home, if it is a point where it can be determined that it is a base of life from the action history even if it is not registered as home, it is determined as home. May be.

  In this way, the general stopping tendency of the user is grasped. However, depending on the type of destination, there are cases in which there are many cases where the user often goes straight or stops on the way. For example, a user who has a hobby of visiting XX (XX is a castle, roadside station, general store, etc.) will go straight to the destination if the destination is the XX even if there are many stops on a daily basis. There is a tendency. Therefore, the drop-in tendency is preferably grasped for each destination type in addition to each user.

(Guidance preparation part 52)
The guidance preparation unit 52 sets a destination based on a user's input operation to the input unit 40 and sets a route to reach the set destination. The guidance preparation unit 52 includes a destination determination unit 521, an importance level determination unit 522, a desire level determination unit 523, and a route setting unit 524. The processing of these units will be described with reference to FIG. The navigation ECU 50 starts the process of FIG. 2 when the destination input mode is entered based on the input from the input unit 40.

  In step S <b> 1, which is a process of the destination determination unit 521, the destination is determined based on a user input operation performed with respect to the input operation of the input unit 40. As a destination determination method, the user desires from a method of entering a point (facility) directly by inputting a name, a telephone number, or the like, and a facility list narrowed down by a search condition such as a facility genre or area. And a decision method to select the facility.

  Steps S <b> 2 to S <b> 4 are processes of the importance level determination unit 522. In step S2, the basic importance that is the basis of the importance in this trip for the destination determined in step S1 is determined. Importance is a value that indicates how much time you want to spend at that destination on this trip. The basic importance is set in advance for each facility, and qualitatively, the importance is set to be lower as the number of alternative facilities is larger. Therefore, the importance of a prominent theme park where there is no alternative facility is set to a high value. Even in the theme parks and amusement parks, if there are similar facilities, the importance decreases according to the number of facilities. Facilities scattered in many places such as green parks are set to low importance. When the destination is a tourist destination, it often goes around various places in the area including the point (facility) set as the destination, and usually it does not spend much time at the point set as the destination itself It is. That is, the destination set in the sightseeing area has points that can be set as alternative destinations in the area, and the basic importance is lower than that of a famous theme park where there is no alternative facility.

  In step S3, the basic importance determined in step S2 is corrected based on the drop-in tendency for each user. The user identification method is the same as the action history analysis unit 51. If the identified user has a tendency to drop in, the degree of importance is set to be lower than that of a user who tends to go straight. In other words, if the tendency is to go straight, the importance is set higher than that of users who tend to stop by.

  As a specific method for correcting the basic importance, for example, the above-mentioned drop-in tendency is set to a larger numerical value as it tends to go straight to the destination, and the value of the drop-in tendency is multiplied by the basic importance. As described above, when a drop-in tendency is set for each destination type, the drop-in tendency corresponding to the current destination is used.

  In step S4, the importance corrected in step S3 is corrected by the action history of the day. However, the importance to be corrected is only for a part of facility genres that are set in advance, specifically, for a facility genre that is unlikely to stop by a narrow time interval. Which facility genre corresponds to this is preset. For example, a restaurant or a service area can be set as a facility genre corresponding to this.

  In step S5, which is the process of the desire degree determination unit 523, a preset drop-in desire line is selected based on the final importance corrected in step S4. 3 to 6 are drop-in desire lines set in advance in the present embodiment. In this embodiment, four types of drop-in desire lines are prepared. However, the present invention is not limited to this, and the drop-in desire line may be a plurality other than the four types.

  In the drop-in desire lines shown in FIGS. 3 to 6, the horizontal axis represents distance, and the vertical axis represents drop-in desire degree. FIGS. 3 and 6 are drop-in desire lines when the importance of the destination is high, and FIGS. 4 and 5 are drop-in desire lines when the importance of the destination is low. Although the graphs in FIGS. 3 to 6 are the drop-in desire lines from leaving home to returning home, the destinations are various points set at the time of departure. The destination is home. In other words, the destination is different for going and returning. 3 to 6 are composed of two drop-in desire lines corresponding to the destination and the destination (home).

  First, FIG. 3 will be described. FIG. 3 shows a drop-in desire line used when the destination is important. For example, if the importance of the destination is high, such as a famous theme park, it is likely that you will not stop by because you want to spend a lot of time at the destination. Therefore, the desire to drop in remains at the lowest value until it arrives at the destination.

  However, since the return trip is far away, there are many people who want to stop by. When you get close to your house, the reason for coming far away disappears, so your drop-in desire decreases. For this reason, the drop-in desire line from the destination to the home when the importance is high has the shape shown in FIG.

  FIG. 4 shows a drop-in desire level used when the importance of the destination is low. As described above, destinations with low importance include destinations in tourist areas, green parks, and the like. If the destination is less important, you may want to stop if there is a good stop. That said, as soon as I leave, I don't want to stop by somewhere, and as I get far, I feel like I want to drop in and see. Therefore, as shown in FIG. 4, the drop-in desire line when the importance of the destination is low is a curve in which the drop-in desire degree becomes higher toward the destination in the vicinity of the home.

  Note that the absolute value of the drop-in desire may be increased as the distance to the destination increases, or may be a constant value regardless of the distance to the destination. This also applies to FIGS. 3 and 5.

  In FIG. 4, the return trip desire line on the return trip is the same as the return desire line on the return trip in FIG. On the other hand, in FIG. 5, the drop-in desire line on the return trip remains the lowest value regardless of the distance to the home. This is a drop-in desire line reflecting the drop-in desire of a type of user who wants to go straight home. In addition, not only when the importance of the destination is low, but also when the importance of the destination is high, there are users who want to go straight from the destination to the home and return. FIG. 6 is a drop-in desire level reflecting users who want to go straight from the destination to the home when the importance of the destination is high.

  From these drop-in desire lines shown in FIGS. 3 to 6, a drop-in desire line for going and returning is selected based on the importance calculated in step S4. Specifically, when the drop-in desire line calculated in step S4 is higher than a predetermined threshold, a high-priority drop-in desire line is selected. Select.

  The subsequent step S6 is a process of the route setting unit 524, and sets a route that matches the drop-in desire level selected in step S5. Specifically, if the drop-in desire line is the lowest value regardless of the distance to the destination, the purpose is to use a known route search algorithm such as time priority, distance priority, and traffic jam consideration. Search for a route to the ground.

  On the other hand, when the drop-in desire line is a curve that changes according to the distance to the destination, a route that is easy to drop in is set in an area where the drop-in desire is high. As an easy-to-stop route, if you search with the usual route search method, drive on the expressway to the nearest interchange of the destination, and get off the expressway at the interchange before that and drive on the general road A route.

  Alternatively, various stop-off spots are stored in map data in advance, or acquired from the outside using a communication line. Automatically select a stopover location. If there are more than a few stop spots in the above area depending on the level of drop-in desire, the ease of drop-in on the basis of a route that does not stop (the easier it is to drop in if the route cost increases due to route change) A predetermined number is selected in order. Or you may select at random. In addition, when the destination is a point in the tourist area, the tourist area may be an area where a stop spot is extracted.

  7 and 8 are examples of routes set in step S6. The example of FIG. 7 is a case where the destination is a famous theme park and FIG. 3 is selected as a drop-in desire line. In the example of FIG. 7, the route to the famous theme park is from the home, take the highway at the nearest interchange A from home, and take the highway to the most convenient interchange C when going straight to the famous theme park. It is a route using. On the other hand, the return route does not use the interchange C, but sets a route on the general road to the interchange B from the home.

  The example of FIG. 8 is a case where the destination is a facility in a sightseeing area and FIG. 4 is selected as a drop-in desire line. In the example of FIG. 8, in the case of a normal route search algorithm, as shown by the alternate long and short dash line, the route for setting the route on the expressway to interchange F is set at the interchange E immediately after entering the tourist area. Get off and then set up a route to use the general road. Also, on the return route, a route using a general road is set in the sightseeing area.

  Returning to FIG. If a route is set in step S6, the process proceeds to step S7. In step S7, on the condition that the route guidance start button is operated, route guidance is started on the route set in step S6.

(Guidance execution unit 53)
The guidance execution unit 53 performs route guidance based on the route set by the guidance preparation unit 52. In addition, during the route guidance, a stopover proposal (recommendation) is made at any time. FIG. 9 shows a recommendation frequency curve for determining the recommendation frequency of the stop-in place. This recommendation frequency curve is preset and stored in the storage unit 10.

  Unlike the drop-in desire line, there is only one type of recommendation frequency curve. The recommendation frequency curve is set based on a user's recommendation desire (a desire to know the presence of a stop-off point). That is, the recommendation frequency curve can be considered as a curve indicating a change in the user's recommendation desire.

  The desire to “know” the stopover point is high before the desire to “stop” drop. And as already explained, the drop-in desire is usually increased once toward the destination, and decreases when approaching the home on the way home. If it is before this drop-in desire on the return trip, it is always possible to notify the stop point itself. For this reason, the recommendation frequency curve remains high until approaching home as shown in FIG. The distance at which the recommendation frequency is decreased and the curve of the decrease are appropriately determined based on experiments. When the drop-in desire level shown in FIGS. 5 and 6 is selected, the portion up to the destination in the recommendation frequency curve is used.

  Then, based on the recommendation frequency determined by the recommendation frequency curve and the current position, a recommendation cycle for proposing a stop point to the user at the current time is determined. Then, the stop point is recommended when the recommendation cycle has elapsed since the previous recommendation. There is no particular limitation on the type of stop point to recommend. For example, a recommended facility that is set in advance within a predetermined distance from the current location is recommended. Alternatively, the user's preference may be learned, and a facility that is close to the current location among facilities included in the user's favorite facility genre, or a facility that has been extracted in consideration of the degree of recommendation may be recommended. .

  As described above, according to the present embodiment described above, the importance level of the destination is determined (S2 to S4), and a route is set according to the drop-in desire level selected based on the importance level (S6). As a result, when the destination is not so important, a route that is easy to stop by before reaching the destination is set, so the destination is not so important, and the route meets the desire to stop in various ways. In addition, when the destination is important, a route that goes directly to the destination is set. In this case as well, the route meets the desire of the user who does not want to drop in on the way.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the above-mentioned embodiment, The following embodiment is also contained in the technical scope of this invention, and also the summary other than the following is also included. Various modifications can be made without departing from the scope.

(Modification 1)
For example, in the above-described embodiment, the importance of the destination may be determined in consideration of the departure time. Specifically, it is determined whether the departure time is a time zone different from the daily action time zone. This time zone may be set in advance. For example, a time zone corresponding to midnight and early morning is set to a time zone different from the daily action time zone. Moreover, you may set the said time slot | zone from a user's action history. When the departure time is a time zone different from the daily action time zone, the importance of the destination is increased. If the departure time is a time zone that is different from the daily action time zone, it is considered that there is a great deal of thought. Therefore, the importance is increased. The method of increasing the importance may be a fixed high importance set in advance regardless of the destination, or a constant value is added by multiplying the importance determined in the above embodiment by a constant value. For example, the importance determined in the above-described embodiment may be corrected.

(Modification 2)
Further, when there is an event whose start time is fixed at the destination determined by the destination determination unit 521 and it can be determined that the event is the purpose, the importance of the destination may be increased. The events here include not only events but also events such as movies. The method for increasing the importance is the same as that in the first modification. The determination that the event is the purpose is made, for example, by acquiring event information at the destination from an external device by communication and determining from the time difference between the event start time and the scheduled arrival time. For convenience, the facility where the event is to be performed may be registered in advance, and the event may be determined to be the purpose when the destination is the facility registered in advance.

(Other variations)
It is not essential to modify the basic importance, and the basic importance may be used as the final importance as it is. Even when the basic importance is corrected, only one of steps S2 and S3 may be used. In addition, it is not necessary to distinguish the tendency to stop by going and returning.

DESCRIPTION OF SYMBOLS 1: Car-mounted navigation apparatus, 10: Memory | storage part, 20: Display part, 30: GPS receiver, 40: Input part, 50: Navigation ECU, 51: Action history analysis part, 52: Guidance preparation part, 521: Destination determination 522: Importance determining unit 523: Desire determining unit 524: Route setting unit 53: Guidance executing unit 60: CAN

Claims (10)

A destination determining unit (521, S1) for determining a destination for route guidance;
An importance determining unit (522, S2 to S4) for determining the importance of the destination determined by the destination determining unit;
Degree of desire determination for determining a drop-in desire according to the importance of the destination so that the user's drop-in desire for going to the destination is higher when the importance is low than when the importance is high Part (523, S5),
A navigation device, comprising: a route setting unit (524, S6) that sets a route to a destination by changing the ease of stopping according to the determined degree of stoppage desire. In claim 1,
The importance determining unit (522, S2) determines the importance of the destination based on the number of alternative facilities. In claim 2,
Based on the user's behavior history, the behavior history analysis unit (51) for determining a tendency to stop by the user, which is a tendency about whether to stop,
The importance level determination unit (522, S3) corrects the importance level of the destination determined based on the number of alternative facilities based on the drop-in tendency for each user determined by the behavior history analysis unit. A featured navigation device. In claim 3,
The action history analysis unit determines the drop-in tendency for each user by destination type,
The importance determination unit corrects the importance of the destination determined based on the number of alternative facilities based on a stop-in tendency that matches the current destination determined by the destination determination unit. Navigation device. In any one of Claims 2-4,
The importance level determination unit (522, S4) modifies the importance level of the destination determined based on the number of alternative facilities based on the action history of the day for a preset facility genre. A featured navigation device. In any one of Claims 2-5,
The importance level determination unit corrects the importance level of the destination determined based on the number of alternative facilities to a high value when the departure time is a time zone different from the daily activity time zone. A navigation device. In any one of Claims 1-6,
The navigation apparatus according to claim 1, wherein the desire degree determination unit determines the stop desire degree as a stop desire line in which the stop desire degree is determined according to a distance from the departure. In claim 7,
When the degree of importance determined by the importance level determination unit is determined to be low, the desire level determination unit has a higher level of stoppage desire on the destination side than on the departure side. A navigation device characterized by a line. In claim 7 or 8,
When the degree of importance determined by the importance level determination unit is determined to be high, the desire level determination unit determines that the drop-in desire level line is a constant line at a predetermined minimum value from the departure point to the destination. The navigation apparatus characterized by doing. In any one of Claims 1-9,
While performing route guidance on the route determined by the route setting unit, the frequency of recommendation is high until the destination is close to the destination home in the entire route including the outbound route where the departure point is home and the return route where the destination is home. A navigation apparatus comprising a guidance execution unit (53) that sequentially proposes a stopover location based on a recommendation frequency line in which a recommendation frequency decreases when approaching a home.

Images