JP2015184238A - Route guidance device and route guidance method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a route guidance device configured to provide information on a plurality of routes for guidance more appropriately, and a route guidance method.SOLUTION: A route guidance device includes: a first calculation section 110 which calculates an estimation error range of an estimated arrival time, on a first route to a destination; a second calculation section 120 which calculates an estimation error range of an estimated arrival time on a second route different from the first route, for a route branch point; and an estimated value output section 130 which outputs the estimation error range on the first route, on the basis of whether the estimation error range on the second route is smaller than the estimation error range on the first route. When the estimation error range on the second route is smaller than the estimation error range on the first route and the estimation error ranges on both routes are output, the estimated value output section 130 notifies a user about a branch point before arriving at the branch point branching into the first and second routes.

Description

  The present invention relates to a movement guidance apparatus and a movement guidance method that are useful when applied to guidance related to movement of a moving body to a destination.

  In recent years, information terminals such as navigation systems used in vehicles are provided with a function of guiding a route from a departure place to a destination. This type of information terminal guides the route to the destination to the user, and also guides the user the estimated arrival time, which is the time when the vehicle arrives at the destination, and the time required for arrival. On the other hand, the estimated arrival time calculated uniformly based on the travel distance from the departure point to the destination changes depending on the road conditions etc., so the actual arrival time and the estimated arrival time are different. There are many things. Therefore, for example, the apparatus described in Patent Literature 1 calculates an error in the predicted arrival time based on the degree of variation in traffic information used for calculating the predicted arrival time. Further, this apparatus displays the calculated error together with the estimated arrival time.

JP 2008-96445 A

  By the way, if an error in predicted arrival times is randomly displayed for a plurality of routes, the user may be confused in route selection. For example, even if there is a possibility that the route can reach the destination at the earliest time, if the error range is larger than other routes, the arrival time will eventually be later than when another route is selected. There is also a possibility.

  Further, when the range of the estimated arrival time error for a plurality of routes is output, guidance before the point where the plurality of routes branch is not taken into consideration. For example, when the range of error for a plurality of routes is output, if guidance in the direction of travel for one route such as “turn left about 300 m ahead” is performed, the user outputs the error range, I feel that the guidance is contradictory.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a movement guide device and a movement guide method that can improve the appropriateness of guidance when information on a plurality of routes is provided. There is to do.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A travel guidance device that solves the above problem is a travel guidance device that guides at least one of an estimated arrival time when a mobile object arrives at a destination and an estimated travel time required until the mobile object arrives at the destination. A first calculation unit that calculates at least one of a prediction error range of arrival prediction time and a prediction error range of movement prediction time for the first route to the destination, and a route to the destination In addition, for the second route different from the first route, at least one of the prediction error range of the arrival prediction time and the prediction error range of the movement prediction time is set as the first route and the second route. Based on whether the prediction error range for the second route is smaller than the prediction error range for the first route or not, about An output control unit that outputs at least one of a measurement error range and a prediction error range for the second path, wherein the output control unit has a prediction error range for the second path that is the first error range. And when outputting both the prediction error range for the first route and the prediction error range for the second route, the first route and the second route are output. The user is informed of the existence of the point in front of the point where the route of.

  The movement guidance method that solves the above problem guides at least one of the estimated arrival time when the mobile body arrives at the destination and the estimated movement time required until the mobile body arrives at the destination using the movement guidance device. The movement guidance method is a method in which the movement guidance device calculates at least one of a prediction error range of an estimated arrival time and a prediction error range of a predicted movement time for the first route to the destination. And at least one of a prediction error range of arrival prediction time and a prediction error range of movement prediction time for a second route different from the first route to the destination, The step of calculating for a point where the first route and the second route branch, a prediction error range for the second route is smaller than a prediction error range for the first route, and When outputting both the prediction error range for the first route and the prediction error range for the second route, the point before the point where the first route and the second route branch. Guiding the presence of the user to the user.

  In the configuration or the method, the prediction error range for the first route and the prediction error range for the second route with higher accuracy than the prediction error range are output, and the user can select a route. When required, the user is guided to a point to be selected for the route. When information on two routes is provided to the user in this way, the appropriateness of the guidance is improved by guiding the points to be selected for the route in advance, so that the user can more easily select the route. It will be done smoothly.

  When the output control unit guides the user of the presence of the point before the point where the first route and the second route branch, the output control unit is configured to move the moving body at the point. It is preferable to limit guidance in the traveling direction.

  When the prediction error range of the two routes is output and guidance in the traveling direction is performed for one route, the user seems to contradict the output of the prediction error range of the two routes and the guidance in the traveling direction. To feel. In the above configuration, when a point that is a target of route selection is guided, guidance in the traveling direction for the route is limited, so that the user can select a route more smoothly.

  In the travel guidance device, the output control unit obtains a user's request regarding arrival time or travel time, and the prediction error range for the second route is included in the prediction error range for the first route. When the degree of coincidence between the prediction error range for the second route and the user's request is high, the second route is provided along with guidance for the presence of the branch point of the first route and the second route. It is preferable to recommend.

  In the above configuration, when it is assumed that the prediction error range for the second route is included in the prediction error range for the first route, it is difficult for the user to select a route. Since it is recommended that the second route is recommended, it is possible for the user to select the route more smoothly.

  In the movement guide device, when the output control unit performs guidance only for the first route, a point where the moving body is scheduled to guide in the traveling direction is a first movement amount before the point. When guiding in the traveling direction and outputting both the prediction error range for the first route and the prediction error range for the second route, the first route and the second route branch. It is preferable to guide the presence of the point before the point by a second movement amount that is larger than the first movement amount.

  According to the above configuration, when information on two routes is provided, the first route and the second route are branched earlier than the timing of performing guidance on route change when one route is guided. Guidance of the point is performed. For this reason, it is possible to allow the user to grasp the point where the first route and the second route branch while securing the time for the user to select the route.

The block diagram which shows schematic structure of the information terminal which is a movement guidance apparatus about one Embodiment of a movement guidance apparatus and a movement guidance method. The schematic diagram which shows the error range about the arrival prediction time of the 1st path | route calculated by the information terminal of the embodiment, and the error range regarding the arrival arrival time of the 2nd path | route. The figure which shows the example of a pattern of the relationship between the error range about the arrival prediction time of the 1st path | route in the same embodiment, and the error range regarding the arrival prediction time of the 2nd path | route. It is an example of the mode of guidance in the embodiment, (a) and (b) are modes of guidance when guiding only the first route, (c) and (d) are the first route and the second route. The figure which shows the mode of guidance in the case of providing the information of route | root of. The flowchart which shows operation | movement of the information terminal in the embodiment. The figure which shows the mode of guidance when a user's request | requirement is "arrival as early as possible" with the pattern of the relationship of a prediction error range. The figure which shows the mode of guidance when a user's request is "arrival at the timing which is not too early and not too late" with the pattern of the relationship of a prediction error range. The figure which shows the mode of guidance when a user's request is "arrival as late as possible" with the pattern of the relationship of a prediction error range.

  Hereinafter, an embodiment embodying a movement guide device and a movement guide method according to the present invention will be described with reference to FIGS. Note that the movement guide device and the movement guidance method of this embodiment are an apparatus and a method for guiding a route from a departure place to a destination for a user who uses a vehicle. The “destination” here may include a relay point in the route in addition to the final destination.

  With reference to FIG. 1, a schematic configuration of an information terminal to which the movement guide device and the movement guide method of the present embodiment are applied will be described. The information terminal 100 is configured by, for example, a navigation system used in a vehicle or a portable information terminal such as a smartphone used in the vehicle. The information terminal 100 includes a communication unit 101 that communicates with a center that is an external device that distributes road traffic information. The information terminal 100 also includes a database 102 in which information acquired from the outside by the communication unit 101 is registered.

  The communication unit 101 communicates with the center to acquire traffic information that is information necessary for calculating the travel time to the destination, and outputs the acquired traffic information to the database 102. The traffic information includes, for example, a link cost for calculating travel costs such as travel time. This link cost is set for each link, which is a section divided in units of intersections, traffic lights, branch points, and the like.

  In addition, the information terminal 100 includes a control device 111 corresponding to the movement guide device. The control device 111 includes a first calculation unit 110, a second calculation unit 120, and a predicted value output unit 130 as an output control unit. In addition, the 1st calculating part 110, the 2nd calculating part 120, and the estimated value output part 130 may perform various control by the calculating device and memory | storage device which each has, and a common calculating device Various controls may be executed by a storage device or the like.

  When the user's destination and search conditions are set, the first calculation unit 110 refers to traffic information registered in the database 102, road map information about links and nodes set at both ends of the link, and the like. And search for a route from the starting point to the destination. The departure location may be the current location of the vehicle input from a vehicle position identification unit (not shown), or may be set through input using the input unit 103 such as a touch panel display. The destination may be set through input using the input unit 103 such as a touch panel display, or may be set based on movement history information indicating a route that has passed in the past. Moreover, it may be set through the center from an external terminal other than the information terminal 100.

  The first calculation unit 110 searches for a route from the departure place to the destination based on the set condition, for example, based on the Dijkstra method. Since the route searched at this time is based on the traffic information acquired from the center, the traffic situation when the traffic information is generated is taken into consideration. Note that the route searched by the first arithmetic unit 110 is referred to as a first route. In the present embodiment, the first route is a first recommended route (navigation route).

  The predicted value output unit 130 outputs the information about the first recommended route input from the first calculation unit 110 to at least one of the audio device 210 and the display device 220 as an output device.

  For example, when the first recommended route is set and the movement of the vehicle using the information terminal 100 is started, the second calculation unit 120 is configured to communicate with the communication unit every time the vehicle reaches a predetermined distance from an intersection or a branch point. Traffic information is newly acquired via the database 101 and the database 102. Then, based on the traffic information registered in the database 102, the route from the departure point of the vehicle to the destination is different from the search condition of the first calculation unit 110 or different information, for example, based on the Dijkstra method. Explore. As a result, a route searched for starting from the intersection or branch point is searched. Note that the route searched by the second arithmetic unit 120 is referred to as a second route.

  As shown in FIG. 2, the first calculation unit 110 predicts the arrival time taking into account an error when the first recommended route R1, which is the first route, is used based on the link cost, traffic information, and the like. Or the range of the movement prediction time in consideration of the error is calculated as the prediction error range TR1. In the present embodiment, the first calculation unit 110 calculates a prediction error range TR1 that is an error range of the arrival prediction time for the first recommended route. Then, information such as a link and a node indicating the first recommended route R1 and the prediction error range TR1 are output to the predicted value output unit 130.

  The second calculation unit 120 calculates, as the prediction error range TR2, an arrival prediction time range that takes into account an error when the second route R2 is used or a movement prediction time range that takes into account an error. In the present embodiment, the second calculation unit 120 calculates a prediction error range TR2 that is an error range of the arrival prediction time for the second route R2. Then, the second calculation unit 120 outputs information such as a link and a node indicating the second route R2 and the prediction error range TR2 to the prediction value output unit 130.

  Next, the predicted value output unit 130 will be described. The predicted value output unit 130 determines guidance output modes as shown in (i) to (iv) below based on the input prediction error ranges TR1 and TR2.

(I) Determination of user's request regarding arrival time or travel time The predicted value output unit 130 acquires a user's request regarding arrival time or travel time, and a function that estimates the user's request regarding arrival time or travel time At least one of the following. The user's request regarding the arrival time or the travel time may be input through the input unit 103, for example. When the user request regarding the arrival time or the travel time is not input through the input unit 103, the predicted value output unit 130 displays the user schedule information registered in the information terminal 100 or the like, the user action pattern, the destination information. The user's request may be estimated based on the above.

  In the present embodiment, the user's request regarding the arrival time or travel time is determined by dividing it into three: “arrival as early as possible”, “arrival at a time that is not too early and not too late”, and “arrival as late as possible”. To do. If the desired arrival time to the destination is set by the user, the user's request is divided into the above-mentioned patterns based on the assumption that the user can arrive at the destination by the desired arrival time. To do.

  The predicted value output unit 130 determines whether or not the routes searched by the first calculation unit 110 and the second calculation unit 120 are different from each other. When the routes searched by the first calculation unit 110 and the second calculation unit 120 are different, the predicted value output unit 130 determines the user's request regarding the arrival time or travel time described above and the first calculation unit 110. A mode of output to the audio device 210 and the display device 220 is determined based on the prediction error range TR1 calculated by the second calculation unit 120 and the prediction error range TR2 calculated by the second calculation unit 120.

(Ii) Comparison of prediction error ranges First, when the prediction value output unit 130 inputs the prediction error ranges TR1 and TR2 from the first calculation unit 110 and the second calculation unit 120, the second calculation unit 120 calculates them. It is determined whether the predicted error range TR2 is smaller than the predicted error range TR1 calculated by the first calculation unit 110, that is, the predicted error range TR1 for the first recommended route.

  When the prediction error range TR2 calculated by the second calculation unit 120 is smaller than the prediction error range TR1 of the first recommended route, that is, when the variation of the prediction error range TR2 is small, the second calculation unit 120 The calculated second route is set as a second recommended route (smooth route). On the other hand, when the prediction error range TR2 calculated by the second calculation unit 120 is larger than the prediction error range TR1 for the first recommended route, the second route has a low merit to guide the user. Is not set as the recommended route. That is, the guidance for the second route is not performed. The comparison of the prediction error ranges may be performed after the above-described (i) determination of the user's request regarding the arrival time or the travel time, or may be performed first.

(Iii) Determination of pattern of relationship between prediction error ranges When the second recommended route is detected in this way, the predicted value output unit 130 determines the prediction error range TR1 of the first recommended route and the second recommended route. It is determined whether the relationship of the prediction error range TR2 corresponds to any one of the following pattern 1 to pattern 3.

  With reference to FIG. 3, these patterns 1 to 3 will be described. As shown on the left side in FIG. 3, a pattern 1 is defined when any of the times of the prediction error range TR2 of the second recommended route is earlier than any of the times of the prediction error range TR1 of the first recommended route. .

  In addition, as shown on the right side in FIG. 3, the case where any of the times of the prediction error range TR2 of the second recommended route is later than any of the times of the prediction error range TR1 of the first recommended route And

Further, a case where the time of the prediction error range TR2 of the second recommended route is all included in the prediction error range TR1 of the first recommended route is referred to as a pattern 2.
(Iv) Determination of the degree of coincidence between the pattern of each prediction error range and the user's request The predicted value output unit 130 has the merit of guiding the second recommended route to the user based on these patterns 1 to 3. If the cost is high or the merit cannot be determined, information on the second recommended route is provided to the user.

  For example, when the user's request acquired or estimated by the predicted value output unit 130 is “arrival as soon as possible”, a route with a high probability of arriving at the destination early can be guided. desirable. Therefore, the merit that information related to the second recommended route corresponding to pattern 1 is guided to the user is enhanced.

  When the user's request acquired or estimated by the predicted value output unit 130 is “arrival as late as possible”, it is possible to guide a highly probable route that can arrive at the destination later. desirable. Therefore, the merit that information related to the second recommended route corresponding to the pattern 3 is guided to the user is enhanced.

  On the other hand, when the user's request acquired or estimated by the predicted value output unit 130 is “arrival at a timing that is not too early and not too late”, for example, when a desired arrival time is set, the arrival A route that can arrive at a timing within a predetermined time from the desired time is desirable, and the merit of guiding the second recommended route corresponding to pattern 2 is enhanced. However, in the case of pattern 2, if the vehicle uses the first recommended route, it may arrive at the destination earlier than when the second recommended route is used, and the vehicle uses the first recommended route. There are two conflicting possibilities, such as the possibility of arriving later at the destination than when using the second recommended route. For this reason, in the case of this pattern 2, for a user who has a request such as “arrival as early as possible” and a user who has a request such as “arrival as late as possible”, a simple comparison of prediction error ranges is not enough. The merit of guiding the second recommended route cannot be determined.

  For example, a user having a request such as “arrival as soon as possible” is guided to the second recommended route of the pattern 2 and the user selects the second recommended route having a small prediction error range TR2. The destination using the first recommended route may arrive at the destination earlier.

  On the other hand, the second recommended route of the pattern 2 is guided to the user who has a request such as “arrival as late as possible”, and the user selects the second recommended route having a small prediction error range TR2. May arrive later at the destination using the first recommended route.

  Thus, even if the relationship between the prediction error ranges TR1 and TR2 is the scene of the pattern 2, if the information regarding the second recommended route is randomly guided, it is difficult for the user to vary the estimated arrival time. While it becomes possible to select a route, it may be difficult to determine which route has a higher merit.

  Therefore, in this embodiment, the relationship between the prediction error range TR1 of the first recommended route and the prediction error range TR2 of the second recommended route corresponds to the pattern 1 or the pattern 3, and the second recommended route and the user's request When the degree of coincidence is high, the prediction error ranges TR1 and TR2 are output and the second recommended route is recommended. When the degree of coincidence between the second recommended route and the user's request is low, only the first recommended route is guided.

  Furthermore, when the relationship between the prediction error range TR1 of the first recommended route and the prediction error range TR2 of the second recommended route corresponds to the pattern 2, these prediction error ranges TR1 and TR2 are output and the first The existence of an intersection or a branch point (hereinafter referred to as a route branch point) where the recommended route and the second recommended route branch is provided. At this time, when the user's request acquired or estimated by the predicted value output unit 130 is “arrival at a timing that is not too early and not too late”, the merit of guiding the second recommended route to the user Therefore, guidance for recommending the second recommended route is provided along with guidance for the presence of the route branch point.

With reference to FIG. 4, the output mode of the display device 220 and the output mode of the audio device 210 according to the guidance mode determined as described above will be described.
As shown in FIG. 4A, in the case where only the first recommended route is guided, and before the point where the route change is guided, such as a right or left turn at an intersection, the prediction of the first recommended route is performed. The error range is not output on the screen of the display device 220, and the map display M is output. In addition, the voice device 210 outputs a guidance voice V for guiding the traveling direction of the vehicle, such as “approx. 300 m ahead, left direction”. This guidance voice V is output at the timing when the vehicle reaches the front by a first distance (for example, 300 m) which is the first movement amount from an intersection or the like. The distance to the intersection or the like is calculated based on the current location of the vehicle and the road map information by the predicted value output unit 130, for example.

  As shown in FIG. 4B, when only the first recommended route is guided, and when going straight through an intersection or a branch point, the prediction error range of the first recommended route is just before that point. The map display M is output without being output to the screen of the display device 220. Further, the guidance voice for guiding the traveling direction of the vehicle is not output.

  On the other hand, when information about the first recommended route and the second recommended route is provided, a guidance voice is output only in the traveling direction of one recommended route, as shown in FIG. Then, the user feels that there is a contradiction in the guidance. In addition, as shown in FIG. 4B, if no guidance voice is output, the user can obtain the first recommendation even though the information about the first recommended route and the second recommended route is provided. It cannot be grasped from which intersection or branch point the route and the second recommended route branch off. For this reason, when providing information on the first recommended route and the second recommended route, the existence of the route branch point is basically guided by voice.

  As shown in FIG. 4C, when information about the first recommended route and the second recommended route is provided, a display α1 indicating the direction of the first recommended route and its prediction error range are displayed. The display α2 is output to the display device 220. A display β1 indicating the direction of the second recommended route and a display β2 indicating the prediction error range are output to the display device 220.

  In addition, for example, “about 700 m ahead, an intersection” is output from the voice device 210 as a guidance voice V that notifies the presence of a route branch point along with the relative distance between the vehicle and the point. This guidance voice V is output at the timing when the vehicle has reached the second distance (for example, 700 m) which is the second movement amount from the route branch point. The second distance is set to be larger than the first distance. That is, in this case, the guidance voice V is output earlier than the timing at which the voice guidance regarding the course change when one recommended route is guided.

  In addition, when the prediction error range of the second recommended route has a high degree of coincidence with the user's request, the guidance voice V is a voice that recommends the second recommended route, such as “I recommend turning left”. Is added.

  By the way, when information about the first recommended route and the second recommended route is provided, when the prediction error range of the second recommended route is not necessarily highly consistent with the user's request, If the second recommended route is recommended, the user may feel troublesome.

  For this reason, as shown in FIG. 4D, when the prediction error range of the second recommended route does not necessarily have a high degree of coincidence with the user's request, the voice device 210 causes the presence of a route branch point. Although the guidance voice V is output, the guidance voice recommending the second recommended route is not output.

  Next, the operation of the information terminal 100 will be described according to the processing procedure with reference to FIG. This process is repeated at a predetermined cycle until the vehicle reaches the destination. Further, it is assumed that the first calculation unit 110 searches for the first recommended route and outputs it to the predicted value output unit 130 together with the predicted error range TR1.

  As shown in FIG. 5, the second calculation unit 120 determines whether the vehicle used by the information terminal 100 has approached an intersection or a branch point based on road map information stored in a storage unit (not shown). (Step S1). At this time, for example, the second calculation unit 120 determines whether or not the relative distance between the vehicle and the intersection or branch point located in front of and in front of the vehicle is equal to or less than a predetermined distance. For example, if the relative distance between the vehicle and the intersection or branch point is greater than a predetermined distance and it is determined that the vehicle is not approaching the intersection or branch point (step S1: NO), the second computing unit 120 Since no route is searched, as a result, only the first recommended route is guided to the user (step S8).

  If it is determined that the vehicle has reached a predetermined distance before the intersection or branch point (step S1: YES), the second calculation unit 120 uses conditions different from the search conditions for the first recommended route, or different information. To search for routes. When the second route is searched, the second computing unit 120 outputs information indicating the second recommended route indicating the second route and the prediction error range TR2 to the predicted value output unit 130. .

  As described above, the predicted value output unit 130 determines whether or not the second recommended route exists based on the prediction error ranges TR1 and TR2 (step S2). If it is determined that the second recommended route does not exist (step S2: NO), the predicted value output unit 130 guides only the first recommended route based on the information input from the first calculation unit 110 ( Step S8). That is, in accordance with the first recommended route, guidance shown in FIG. 4A or guidance shown in FIG. 4B is performed.

  If it is determined that the second recommended route exists (step S2: YES), the predicted value output unit 130 determines that the user's request is “arrivals as soon as possible” or “arrivals as late as possible”. It is determined whether or not this is the case (step S3).

  When it is determined that the user's request corresponds to one of “arrival as early as possible” and “arrival as late as possible” (step S3: YES), the predicted value output unit 130 includes the first calculation unit 110. Based on the prediction error ranges TR1 and TR2 input from the second calculation unit 120, it is determined whether or not the relationship between the prediction error ranges TR1 and TR2 corresponds to one of the pattern 1 and the pattern 3 described above. (Step S4).

  When it is determined that the relationship between the prediction error ranges TR1 and TR2 corresponds to one of the above-described pattern 1 and pattern 3 (step S4: YES), the predicted value output unit 130 performs the second recommendation. It is determined whether or not the degree of coincidence between the route prediction error range TR2 and the user's request is high (step S5). For example, if the input user's request or the estimated user's request is “arrival as soon as possible” and the relationship between the prediction error ranges TR1 and TR2 is the pattern 1 described above, the step In S5, it is determined that the degree of coincidence with the user's request is high. If the input user's request or the estimated user's request is “arrival as soon as possible” and the relationship between the prediction error ranges TR1 and TR2 is the pattern 3 described above, in step S5 It is determined that the degree of coincidence with the user's request is low. If the input user's request or the estimated user's request is “arrival as late as possible” and the relationship between the prediction error ranges TR1 and TR2 is the pattern 3 described above, the step In S5, it is determined that the degree of coincidence with the user's request is high. If the input user's request or the estimated user's request is “arrival as late as possible” and the relationship between the prediction error ranges TR1 and TR2 is the pattern 1 described above, the step In S5, it is determined that the degree of coincidence with the user's request is low.

  If it is determined in step S5 that the degree of coincidence with the user's request is high (step S5: YES), the guidance as shown in FIG. In other words, the display α1 indicating the direction of the first recommended route and the display β1 indicating the direction of the second recommended route are output to the display device 220. In addition, the prediction error range TR1 of the first recommended route and the prediction error range TR2 of the second recommended route are output to the display device 220. Further, the voice guidance is the voice guidance at the route branch point, and the second recommended route is also recommended (step S6). In this case, as compared with the case where only the first recommended route is guided, information on each prediction error range is provided to the user, and the voice guidance is changed to the voice guidance at the route branch point. Recommended route guidance is added.

  On the other hand, if it is determined in step S5 that the degree of coincidence between the prediction error range TR2 of the second recommended route and the user's request is low (step S5: NO), only the first recommended route is guided (step S8). . That is, the guidance as shown in FIG. 4A or the guidance as shown in FIG.

  In addition, when it is determined in step S4 that the relationship between the prediction error ranges TR1 and TR2 does not correspond to any of the above-described pattern 1 and pattern 3 and corresponds to pattern 2 (step S4: NO), FIG. Guidance like (d) is performed. In other words, the display α1 indicating the direction of the first recommended route and the display β1 indicating the direction of the second recommended route are output to the display device 220. In addition, the prediction error range TR1 of the first recommended route and the prediction error range TR2 of the second recommended route are output to the display device 220. Also, the voice guidance is voice guidance at the route branch point (step S9). In this case, as compared with the case of guiding only the first recommended route, information on each prediction error range is provided to the user, and the voice guidance is changed to the voice guidance at the route branch point.

  On the other hand, if it is determined in step S3 that the user's request is not “arrival as early as possible” or “arrival as late as possible” but “arrival at a timing that is not too early and not too late” (step S3). (S3: NO), the predicted value output unit 130 determines whether or not the relationship between the prediction error ranges TR1 and TR2 corresponds to the above-described pattern 2 (step S7).

  If the user's request is “arrival at a timing that is not too early or too late” and the predicted value output unit 130 determines that the relationship between the predicted error ranges TR1 and TR2 corresponds to the above-described pattern 2 (step S7: YES) ), Guidance in step S6 described above is performed.

  Further, when the user's request is “arrival at a timing that is not too early and not too late” and the predicted value output unit 130 determines that the relationship between the predicted error ranges TR1 and TR2 does not correspond to the above-described pattern 2 (step S1). S7: NO), guidance for only the first recommended route is performed (step S10).

Next, an operation obtained by route guidance by the information terminal 100 will be described.
In FIG. 6, the mode of guidance when the user's request is “arrival as soon as possible” is shown for each of patterns 1 to 3 that are the relationship between the prediction error ranges TR1 and TR2. In this figure, the direction of travel according to the first recommended route shows the mode of guidance when the turn direction is a right turn or left turn at the route branch point, and the travel direction according to the first recommended route is The pattern of the mode of guidance when traveling straight at the route branch point is shown in the lower part.

  As described above, when the user's request is “arrival as soon as possible” and the relationship between the prediction error ranges TR1 and TR2 is the pattern 1 described above, the prediction error range of each path is displayed. α2 and β2 are displayed on the display device 220, and the presence of the route branch point is guided by voice together with the relative distance from the vehicle. For this reason, for example, even when a plurality of intersections are close to each other in front of the vehicle and there is a possibility that it is difficult for the user to recognize the route branch point, the user corresponds to the points corresponding to the prediction error range displays α2 and β2, that is, the first It is easy to grasp which point is where the recommended route and the second recommended route branch off. In addition, for example, the guidance in the traveling direction for one route such as “about 300 m ahead and turn left” is stopped, so that the user is prevented from feeling inconsistency in the guidance. In addition, the second recommended route close to the user's request is recommended, so that the route can be selected more smoothly.

  When the relationship between the prediction error ranges TR1 and TR2 is the pattern 2 described above, the display device 220 displays the prediction error ranges of the respective paths as the displays α2 and β2. Further, only the presence of the route branch point and the relative distance between the route branch point and the vehicle are guided by voice. For this reason, the user can grasp which point the displays α2 and β2 correspond to, so that the route can be selected smoothly. Further, in this case, the route guidance and the route recommendation are stopped, so that it is suppressed that the user feels inconsistency or discomfort in the guidance.

  On the other hand, when the relationship between the prediction error ranges TR1 and TR2 is the pattern 3 described above, the prediction error range for each route is not displayed, and guidance is provided only for the first recommended route. Therefore, a route with low merit for guiding to the user is not guided, so that the user can be prevented from feeling inconsistency or discomfort in the guidance.

  In FIG. 7, the mode of guidance when the user's request is “arrival at a timing that is not too early and not too late” is shown for each of patterns 1 to 3 that are the relationship between the prediction error ranges TR1 and TR2. In this figure, the direction of travel according to the first recommended route shows the mode of guidance when the turn direction is a right turn or left turn at the route branch point, and the travel direction according to the first recommended route is The pattern of the mode of guidance when traveling straight at the route branch point is shown in the lower part.

  When the user's request is “arrival at a timing that is not too early and not too late” and the relationship between the prediction error ranges TR1 and TR2 is the pattern 1 described above, the prediction error range of each route is displayed. Instead, guidance for only the first recommended route is performed. Therefore, a route with low merit for guiding to the user is not guided, so that the user can be prevented from feeling inconsistency or discomfort in the guidance.

  Further, when the relationship between the prediction error ranges TR1 and TR2 is the pattern 2 described above, the prediction error ranges of the respective routes are displayed on the display device 220 as the displays α2 and β2, and the presence of the route branch point is Along with the relative distance of, it is guided by voice. For this reason, it is easy for the user to grasp which point corresponds to the prediction error range displays α2 and β2, and it is suppressed that the user feels contradiction or discomfort in the guidance. In addition, since the second recommended route that is close to the user's request is recommended, the user can select the route smoothly.

  On the other hand, when the relationship between the prediction error ranges TR1 and TR2 is the pattern 3 described above, the prediction error range of each route is not displayed, and only the first recommended route is guided. Therefore, a route with low merit for guiding to the user is not guided, so that the user can be prevented from feeling inconsistency or discomfort in the guidance.

  In FIG. 8, the mode of guidance in the case where the user's request is “arrival as late as possible” is shown for each of patterns 1 to 3 that are the relationship between the prediction error ranges TR1 and TR2. In this figure, the direction of travel according to the first recommended route shows the mode of guidance when the turn direction is a right turn or left turn at the route branch point, and the travel direction according to the first recommended route is The pattern of the mode of guidance when traveling straight at the route branch point is shown in the lower part.

  When the user's request is “arrival as late as possible” and the relationship between the prediction error ranges TR1 and TR2 is the pattern 1 described above, the prediction error range of each route is not displayed, and the first Guidance is provided only for the recommended route. Therefore, a route with low merit for guiding to the user is not guided, so that the user can be prevented from feeling inconsistency or discomfort in the guidance.

  When the relationship between the prediction error ranges TR1 and TR2 is the pattern 2 described above, the display device 220 displays the prediction error ranges of the respective paths as the displays α2 and β2. Further, only the presence of the route branch point and the relative distance between the route branch point and the vehicle are guided by voice. For this reason, the user can grasp which point the displays α2 and β2 correspond to, so that the route can be selected smoothly. Further, in this case, the route guidance and the route recommendation are stopped, so that it is suppressed that the user feels inconsistency or discomfort in the guidance.

  On the other hand, when the relationship between the prediction error ranges TR1 and TR2 is the pattern 3 described above, the prediction error ranges of the respective routes are displayed on the display device 220 as displays α2 and β2, and the presence of the route branch point is Along with the relative distance of, it is guided by voice. For this reason, it is easy for the user to grasp which point corresponds to the prediction error range displays α2 and β2, and it is suppressed that the user feels contradiction or discomfort in the guidance. In addition, since the second recommended route that is close to the user's request is recommended, the user can select the route smoothly.

As described above, according to the movement guide device and the movement guide method according to the present embodiment, the following effects can be obtained.
(1) The prediction error range TR1 for the first route and the prediction error range TR2 for the second route with higher accuracy than the prediction error range TR1 are output, and the user is requested to select a route. In such a case, the presence of a route branching point to be selected for the route is guided to the user by voice. Thus, when the information regarding two routes is provided to the user, the route branch point is guided in advance, so that the user can select the route more smoothly.

  (2) After the prediction error ranges TR1 and TR1 of the two routes are output to the display device 220, voice guidance in the traveling direction for only one route, such as “approx. 300 m ahead, left” is performed. The user feels that the output of the prediction error range of the two routes and the guidance in the traveling direction contradict each other. In the above configuration, when the route branch point is guided, the voice guidance in the traveling direction for one route is restricted, so that the user is prevented from feeling inconsistency in the guidance. For this reason, the route selection by the user is performed more smoothly.

  (3) When it is assumed that the prediction error range TR2 for the second route is included in the prediction error range TR1 for the first route, so that it becomes difficult for the user to select a route, the prediction value output unit 130 It is determined whether or not the second route meets the user's request. When the second route is estimated to meet the user's request, the second route is recommended to the user by voice guidance, so that the user can select the route more smoothly.

  (4) When only the first recommended route is guided, for the point where the vehicle is scheduled to change the traveling direction, when the vehicle arrives just a first distance from the point, the traveling direction guidance is given. Done. In addition, when information about the first recommended route and the second recommended route is provided, when the vehicle reaches a position closer to the second distance than the first distance, the prediction error range is displayed on the display device. The voice guidance for the presence of the route branch point is started. For this reason, it is possible to allow the user to grasp the point where the first route and the second route branch while securing the time for the user to select the route.

(Other embodiments)
In addition, the said embodiment can also be implemented with the following forms.
In the above embodiment, the first recommended route is a route searched based on the destination set by the user and the search condition, but the search condition is not set by the user but is set in advance in the travel guidance device The selected condition, the condition optimized or selected by the movement guide device, and the like may be used.

  In the above embodiment, the user's request is divided into three, “arrival as early as possible”, “arrival at a time that is not too early and not too late”, and “arrival as late as possible”. It may be only “early arrival”. Further, for example, it may be divided into “arrival as early as possible” and “arrival as late as possible”. Further, the user's request is divided into three or more patterns such as “early arrival within 30 minutes from the desired arrival time” and “arrival 10 minutes before and after the desired arrival time”. Also good. In this case, for example, when the prediction error range of the second recommended route is included in the prediction error range of the first recommended route, whether or not the information related to the second recommended route can be output is determined by the user's request. The determination may be made based on the degree of coincidence.

  In the above-described embodiment, when the prediction error range of the first recommended route or the prediction error range of the second recommended route is calculated and is disadvantageous for the user's desired arrival time, the disadvantageous recommended route There is no need to provide guidance. Further, when the calculated prediction error range is unfavorable with respect to the user's desired arrival time, the prediction error range of the corresponding recommended route may not be output. In addition, when it is disadvantageous for the user's desired arrival time, the latest time of the prediction error range is later than the desired arrival time, the earliest time of the prediction error range is later than the desired arrival time, Alternatively, the difference is not more than a preset time.

  In the above embodiment, the route according to the user's request regarding the arrival time at the destination is guided, but based on the degree of coincidence with the other user's request, it is determined whether the route can be guided. May be. For example, it may be intended to guide a route that does not require refueling, a route that meets the user's preference, and the like.

  In the above-described embodiment, the guidance of the route branch point is output at the timing when the second travel distance is reached from the route branch point, and the guidance voice for guiding only the first recommended route is output from the route branch point to the first point. Although the information is output at the timing when it reaches the front by the amount of movement, these guides may be output at the same timing.

  In the above-described embodiment, the guidance voice at the route branch point is output at the timing when the second branch distance (e.g., 700 m), which is the second movement amount, arrives from the route branch point. When only the first recommended route is guided, the guidance voice is output at the timing when the first distance (for example, 300 m), which is the first movement amount, is reached from the route branch point. These first movement amount and second movement amount may be based on time. In this case, the guidance for the route branch point is output at the timing when the predicted time until the route branch point is reached at the second time (for example, 10 seconds).

  In the above embodiment, when the fuel and the energy consumption are insufficient, and there is no point where the fuel or the energy consumption can be replenished in the second recommended route, it is impossible to continue the navigation. You may be restricted.

  In the above embodiment, at least one of the first calculation unit 110, the second calculation unit 120, and the predicted value output unit 130 of the information terminal 100 is a center that is an external device that can communicate with the information terminal 100 and the vehicle. It may be provided. According to this, the information terminal 100 only needs to display the information calculated at the center or the information determined to be output, and the processing load can be reduced.

  In the above embodiment, the output of information related to the first recommended route and the second recommended route may be only audio or only images. In the case of outputting only the voice, for example, the prediction error ranges TR1 and TR2 are notified to the user by voice, and the existence of the route branch point and the distance to the route branch point are guided by voice. On the other hand, when outputting only an image, for example, the prediction error ranges TR1 and TR2 are displayed on the display device 220, and the presence of the route branch point and the distance to the route branch point are displayed on the display device 220.

  In the above embodiment, information related to the recommended route and the prediction error range of the predicted arrival time is mainly output and guided to the user. Not only this but the information regarding a recommendation course and the prediction error range of movement prediction time may be outputted, and may be guided to a user. Similarly, information on the recommended route, the prediction error range of the predicted arrival time, and the prediction error range of the predicted movement time may be output and guided to the user.

In the above embodiment, the second recommended route may be two or more routes. Then, for each of two or more second recommended routes, route guidance and output of a prediction error range may be performed.
In the above embodiment, the prediction error range of the predicted arrival time and the predicted movement time is calculated. In addition, the prediction error range may be calculated for at least one of the moving distance of the moving body to the destination, the consumption of fuel or energy of the moving body, and the usage fee for the route of the moving body. Then, information regarding a recommended route having a relatively small prediction error range may be guided.

  In the above embodiment, the moving body may be a user who uses the information terminal 100 instead of a vehicle. According to this, the above guidance is possible even when the user walks or moves on a bicycle or the like.

  DESCRIPTION OF SYMBOLS 100 ... Information terminal 101 ... Communication part 102 ... Database 103 ... Input part 110 ... 1st calculating part 120 ... 2nd calculating part 130 ... Predicted value output part 210 ... Audio | voice apparatus, 220 ... Display apparatus.

Claims (5)

A movement guidance device for guiding at least one of an estimated arrival time at which a mobile object arrives at a destination and an estimated movement time required for the mobile object to arrive at the destination,
A first calculation unit for calculating at least one of a prediction error range of arrival prediction time and a prediction error range of movement prediction time for the first route to the destination;
For a second route different from the first route that is a route to the destination, at least one of a prediction error range of arrival prediction time and a prediction error range of movement prediction time is set as the first route. A second calculation unit for calculating a route and a point where the second route branches;
Based on whether the prediction error range for the second route is smaller than the prediction error range for the first route, the prediction error range for the first route and the prediction for the second route An output control unit that outputs at least one of the error ranges;
The output control unit has a prediction error range for the second route smaller than a prediction error range for the first route, and the prediction error range for the first route and the second route. When both of the prediction error ranges are output, the movement guide device guides the existence of the point to the user before the point where the first route and the second route branch.   When the output control unit guides the existence of the point to the user before the point where the first route and the second route branch, the output control unit guides the traveling direction of the moving body at the point. The movement guide apparatus according to claim 1 to be limited.   The output control unit acquires a user's request regarding arrival time or travel time, and includes a prediction error range for the second route in a prediction error range for the first route. When the degree of coincidence between the prediction error range and the user's request is high, guidance for recommending the second route is provided together with guidance for the presence of the point where the first route and the second route branch. The movement guide apparatus according to claim 1 or 2.   When the output control unit performs guidance only for the first route, the output control unit performs guidance in the traveling direction before the point where the moving body plans guidance in the traveling direction by a first movement amount. In addition, when outputting both the prediction error range for the first route and the prediction error range for the second route, the first route and the second route branch more than the point where the first route branches. The movement guide device according to any one of claims 1 to 3, wherein the presence of the point is guided by a second movement amount that is larger than the first movement amount. A method for guiding at least one of an estimated arrival time at which a mobile body arrives at a destination and an estimated travel time required for the mobile body to arrive at a destination using a movement guide device,
The movement guide device is
Calculating at least one of a prediction error range of arrival prediction time and a prediction error range of movement prediction time for the first route to the destination;
For a second route different from the first route that is a route to the destination, at least one of a prediction error range of arrival prediction time and a prediction error range of movement prediction time is set as the first route. Calculating a route and a point where the second route branches;
The prediction error range for the second path is smaller than the prediction error range for the first path, and both the prediction error range for the first path and the prediction error range for the second path And a step of guiding the user of the presence of the point before the point where the first route and the second route branch.

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