JP5001565B2 - Navigation device - Google Patents

Description

  The present invention relates to a navigation device that provides route guidance to a destination.

  2. Description of the Related Art Conventionally, navigation devices that perform route guidance from a current location to a destination are known. Recently, a device equipped with VICS that can obtain traffic information in real time and a device that can use DVD software containing a large amount of map information are becoming popular and are steadily spreading.

  When the destination is set, the navigation device searches for the optimum route from the current position to the destination based on the map information and guides the route, so even if the driver does not know the route accurately, the navigation device It is very convenient to get to the ground. However, unlike a personal computer or the like, the navigation device does not have a sufficient input interface, and therefore setting the destination involves complicated work. For example, there is a method in which a 50-sound table is displayed on the screen, and the name of the destination is input by selecting characters one by one from the 50-sound table using up / down / left / right switches. In this method, the act of inputting characters is complicated in the first place, and it is unclear whether or not the destination is registered with the input name. If there is no registration, the destination must be input again. . In addition, there is a method of building a hierarchical structure of regions and categories and narrowing down the destination using the hierarchical structure, but in order to determine the destination by this method, the hierarchical structure becomes deep and narrowing down The number of selections increases and the operation becomes complicated.

On the other hand, a navigation device that estimates a destination without inputting the destination is also known. For example, Patent Document 1 describes a navigation device that estimates a destination and displays it on a display unit when a driver starts traveling without setting the destination. In this navigation device, when the driver selects a displayed destination, the destination is set, so that there is no need for troublesome operations and the destination can be easily set.
JP 2002-328035 A

  However, in the navigation device described in Patent Document 1 described above, a destination candidate is estimated based on a place that has been visited in the past and vehicle travel information. Therefore, when there are many places that have been visited in the past, a large number of destination candidates are displayed. In this regard, Patent Document 1 describes that even when a plurality of pieces of destination information are presented at the beginning of traveling, the estimated destination information is narrowed down as the vehicle travels and the route advances.

  However, when such a configuration is adopted, a large number of destination candidates are presented, and it is difficult to select a destination from a large number of options. In addition, since the destination information presented as the vehicle travels dynamically changes, it is not easy to select the destination even if the driver finds the desired destination on the screen. In particular, while the vehicle is traveling, it is not always possible to pay attention to the information on the presented destination, so in such a configuration, it is extremely difficult to actually select the destination.

  The Japan Automobile Manufacturers Association has formulated the contents to be observed for navigation devices and has announced them as “Revised version 3.0 of the handling of image display devices”. According to this, it is desirable that an image display device such as a navigation device is designed so as to minimize the adverse effects on safe driving. It is supposed not to be. From this point of view, it is not preferable to present many destination candidates.

  In view of the above-described background, an object of the present invention is to provide a navigation device that can easily set a destination.

  The navigation device of the present invention includes a plurality of destination candidates and a destination candidate calculation unit that obtains a selection probability that each destination candidate is selected by the driver by probability calculation, and a plurality of destination candidates that are obtained by the destination candidate calculation unit. A destination candidate display unit that selects two or more destination candidates in order from the one with the highest selection probability and displays a plurality of selected destination candidates, Among destination candidates displayed on the destination candidate display unit, a destination selection unit that accepts selection of one destination, and a route that provides route guidance to the destination selected by the destination selection unit And a guide unit.

  In this way, the driver can easily select a destination by displaying two or more destination candidates with a high selection probability obtained by probability calculation and selecting a destination from them. Can do. In other words, by displaying an appropriate number of destinations, the driver can easily grasp the destination candidates by looking at the displayed options. Further, since the displayed destination candidates are selected in descending order of the probability of being selected by the driver (selection probability), there is a high possibility that the destination that the driver wants to include is included in the displayed candidates. There is a high possibility that the destination can be set only by displaying the destination and accepting the selection once. For example, even if the selection probability is around 30% per destination, such as the selection probability of the first candidate is 35%, the selection probability of the second candidate is 30%, and the selection probability of the third candidate is 25%. The possibility of being selected from the three options is 90%, and there is a high possibility that the destination can be determined by a single display and selection reception. As described in “Handling of image display device, revised version 3.0” above, it is desirable to increase the visibility of the screen and eliminate the adverse effects on safe driving. The number of destination candidates displayed on the display unit is preferably as small as possible. On the other hand, in order to increase the possibility that the destination that the driver wants to include is included in the displayed options, it is better that the number of destinations to be displayed is larger. From these viewpoints, the number of destination candidates displayed on the destination candidate display unit is preferably 2 to 5, and more preferably 3 to 4. The number of destination candidates to be displayed may be determined in advance or may be changed each time according to the selection probability. For example, when the selection probabilities of three or more destination candidates are about the same, the three destination candidates are displayed in descending order of the selection probabilities, and the selection probabilities of the two destination candidates are remarkably high May display two destination candidates.

  In the navigation device, the destination candidate display unit displays the obtained one destination candidate when there is one destination candidate obtained by the destination candidate calculation unit. Also good.

  When only one destination candidate is obtained in this way, one destination candidate is displayed, and an input as to whether or not to select the destination candidate as a destination is accepted. Can be easily set.

  In the navigation device, the destination candidate display unit may display that the destination candidate has not been obtained when the destination candidate calculation unit does not obtain the destination candidate.

  In this way, when the destination candidate is not obtained, the driver can be prompted to perform the next operation by displaying that the destination candidate has not been obtained. Moreover, when a destination candidate is not calculated | required, it is good also as a structure which does not display a destination candidate. Note that “when no destination candidate is found” includes, for example, a case where the selection probability of any destination candidate is lower than a predetermined threshold value and is not suitable as a destination candidate.

  The navigation device includes an engine operation detection unit that detects an engine operation of a vehicle, and the destination candidate calculation unit detects the destination candidate and its selection probability when the engine operation detection unit detects the engine operation. You may ask for.

  Thus, by setting the destination according to the operation of the engine, it is possible to perform appropriate route guidance from the beginning of vehicle travel.

  The navigation device includes a route departure detection unit that detects that a vehicle has deviated from the route to the destination searched for by the route guide unit, and the route guide unit is configured to route a route at the route departure detection unit. When a departure from the vehicle is detected, the route from the current position of the vehicle to the destination is re-searched, route guidance is performed using the newly searched route, and the destination candidate calculation unit is configured to detect the route departure. The unit may obtain the destination candidate and its selection probability when detecting a predetermined number of deviations.

  In this way, when the number of times the vehicle deviates from the route reaches a predetermined number, it is determined that the driver is heading for a destination different from the set destination, so a new destination candidate is displayed. By selecting the destination, the destination can be easily reset.

  The navigation device includes a route departure detection unit that detects that a vehicle has deviated from the route to the destination searched by the route guide unit, and the destination candidate calculation unit is provided in the route departure detection unit. When the departure from the route is detected, the destination candidate and its selection probability may be obtained.

  When the vehicle deviates from the route in this way, it is determined that the driver is heading for a destination different from the set destination, so a new destination candidate is displayed and the destination is selected. Thus, the destination can be easily reset.

  The navigation device includes a distance calculation unit that obtains a distance between the current position of the vehicle and the destination, and the destination candidate calculation unit is configured such that the distance calculated by the distance calculation unit increases with time. The destination candidate and its selection probability may be obtained.

  When the vehicle is away from the destination in this way, it is determined that the vehicle is heading for a destination different from the set destination, so a new destination candidate is displayed and the destination is selected. By doing so, the destination can be easily reset.

  The navigation device includes a destination change accepting unit that accepts a destination change, and the destination candidate calculating unit receives the destination candidate and the destination candidate when the destination change accepting unit accepts the destination change. The selection probability may be obtained.

  Thus, when the destination change is accepted, the destination candidates are obtained and displayed, so that the destination can be set with a simple interface even when the destination is changed. Just by instructing the driver to change the destination, the destination candidates are displayed. And since the destination should just be selected from the displayed candidates, the destination can be set with two touches, which is very simple. This makes it possible to set a destination without danger even while traveling.

  In the navigation device, the route guidance unit has a suppression guidance mode for performing route guidance by suppressing provision of some information, and a normal guidance mode for performing route guidance without being suppressed, and the destination candidate display When performing route guidance to a destination selected from destination candidates displayed in the section, route guidance may be performed in the suppression guidance mode.

  Since the calculation of the destination by the probability calculation is performed based on the past destination setting history, the destination, etc., there is a high possibility that the destination candidate having a high selection probability is a place frequently visited by the user. Since the destination candidates displayed on the destination candidate display section have a high selection probability, it is determined that the destination selected from the displayed destination candidates is a place where the driver often goes. In such a case, it is possible to reduce the annoyance of performing route guidance on a route that is already known by performing route guidance that suppresses provision of some information. For example, a configuration in which provision of information about directions to a destination is suppressed and traffic information (congestion information, accident information, etc.) is provided may be used to suppress part of route guidance. Further, a configuration in which a route to the destination is displayed on the screen and voice guidance is suppressed may be employed.

  In the navigation device, the route guidance unit performs route guidance in the suppression guidance mode when the selection probability of the destination selected by the destination selection unit is equal to or greater than a predetermined threshold, and the selection probability is If it is smaller than the predetermined threshold, route guidance may be performed in the normal guidance mode.

  In this way, by controlling the suppression guidance mode and the normal guidance mode according to the size of the destination candidate selection probability, it is possible to appropriately determine whether the detailed route guidance is unnecessary or not. Annoyance can be reduced.

  The navigation device includes a traffic fault information receiving unit that receives traffic fault information, and the route guide unit is on a route being guided based on the traffic fault information received by the traffic fault information receiving unit. When the occurrence of a traffic obstacle is detected, a route that avoids the traffic obstacle may be searched and route guidance may be performed in the normal guidance mode.

  In this way, when a traffic fault occurs on the route up to the guidance, a different route is searched, and the route guidance is appropriately performed in the normal guidance mode, so that it is smoothly involved without being involved in the congestion due to the traffic fault. It is possible to guide to the destination. That is, even if the destination is a place where the driver goes frequently, it is not known what route the traffic obstacle can be avoided, so it is preferable to perform route guidance in the normal guidance mode.

  The navigation device includes a destination change detection unit that detects a change in the destination based on a change in the current position of the vehicle and the position of the destination, and the route guidance unit is performing route guidance in the suppression guidance mode. When the change of the destination is detected by the destination change detection unit, the route guidance to the new destination may be performed by switching to the normal guidance mode.

  Even when the probability of selecting a new destination is high, there are cases where the route to the new destination is not well known from the middle of the route to the destination that has been heading forward. According to the present invention, when the change of the destination is detected by the destination change detection unit, the route guidance to the new destination is performed in the normal guidance mode, so that the driver can be appropriately set to the new destination. Can be guided to.

  A navigation device according to another aspect of the present invention includes a destination calculation unit that obtains a destination and a probability that the destination is accepted by the driver by probability calculation, and the probability obtained by the destination calculation unit is a predetermined threshold value or more. In this case, a route guidance unit is provided that performs route guidance to the destination while suppressing provision of some information.

  With this configuration, when there is a high probability that the destination will be accepted and it is determined that the destination is a place where the driver goes frequently, the provision of some information is suppressed, so route guidance for routes that are already known The annoyance of being done can be reduced.

  A navigation device according to another aspect of the present invention includes a destination calculation unit that obtains a destination by probability calculation, a destination display unit that displays the destination obtained by the destination calculation unit, and the destination display unit A selection receiving unit that receives a selection as to whether or not to accept the destination displayed in the above, and a destination that suppresses the provision of some information when the selection receiving unit receives a selection to accept the destination And a route guidance unit that performs route guidance up to.

  With this configuration, if the destination requested and displayed by inference is accepted and it is determined that the driver is a frequent destination, the provision of some information is suppressed, so the route already known The troublesome route guidance can be reduced.

  A navigation device according to another aspect of the present invention includes a destination setting unit that accepts setting of a destination, a route storage unit that stores a destination made in the past and a route taken to go to the destination, It is determined whether or not the route searched as the route to the destination set by the destination setting unit matches the route stored in the route storage unit, and the searched route is stored in the route storage unit If it is determined that the route matches the route, the route guidance unit performs route guidance while suppressing provision of some information. If the route is determined not to match, the route guide unit performs route guidance without suppressing information provision. With.

  Since the route stored in the route storage unit in this way is a route that the driver knows well, when the route searched as the route to the destination matches the route stored in the route storage unit, By suppressing the provision of some information and performing route guidance, the troublesomeness of route guidance can be reduced. The route storage unit that stores destinations and routes that have been performed in the past is known as a so-called “route learning function”. The route storage unit may store a destination that has been performed once in the past and the route thereof, or may store a destination that has been performed a plurality of times in the past and the route thereof. When storing a destination that has been performed multiple times in the past and its route, count the number of times the same destination has been performed on the same route, and store it when the number of times exceeds a predetermined number Also good.

  A navigation apparatus according to another aspect of the present invention includes a destination setting unit that receives a destination setting, a destination that has been made in the past, a route that has been taken to reach the destination, and a date and time that has been taken to the destination. The history storage unit that stores history information and the route guidance unit are routes that have been searched a predetermined number of times within a predetermined period as a route searched for a route to the destination set by the destination setting unit. Is determined based on the history information stored in the history storage unit, and if it is determined that the searched route is a route that has passed a predetermined number of times within a predetermined period, provision of some information is suppressed. A route guidance unit that performs route guidance without suppressing the provision of information when it is determined that the route has not been passed a predetermined number of times within a predetermined period.

  Since the destination and its route that have been performed a predetermined number of times within a predetermined period in this way are routes that the driver knows well, the route guidance is troublesome by suppressing the provision of some information and performing the route guidance. Can be reduced.

  In the navigation method of the present invention, a plurality of destination candidates and a destination candidate calculation step for obtaining a selection probability that each destination candidate is selected by the driver by probability calculation, and the plurality of destination candidates calculated in the destination candidate calculation step. A destination candidate display step for selecting two or more destination candidates in order from the highest selection probability of the destination candidates and displaying a plurality of selected destination candidates; Among destination candidates displayed in the destination candidate display step, a destination selection step that accepts selection of one destination, and a route that provides route guidance to the destination selected in the destination selection step A guidance step.

  With this configuration, similarly to the navigation apparatus of the present invention, two or more destination candidates with a high selection probability obtained by probability calculation are displayed, and the destination candidates are selected from the destination candidates. The destination can be easily selected. Note that various configurations of the navigation device of the present invention can be applied to the navigation method of the present invention.

  The program of the present invention is a program for performing route guidance to a destination, and the computer obtains a destination probability for selecting a plurality of destination candidates and each destination candidate by a driver by probability calculation. Among the plurality of destination candidates obtained in the candidate calculation step and the destination candidate calculation step, two or more destination candidates in order from the highest selection probability are selected and selected. A destination candidate display step for displaying a plurality of destination candidates, a destination selection step for accepting selection of one destination from the destination candidates displayed in the destination candidate display step, and the destination A route guidance step for performing route guidance to the destination selected in the location selection step.

  With this configuration, similarly to the navigation apparatus of the present invention, two or more destination candidates with a high selection probability obtained by probability calculation are displayed, and the destination candidates are selected from the destination candidates. The destination can be set easily. Various configurations of the navigation device of the present invention can be applied to the program of the present invention.

  According to the present invention, two or more destination candidates with a high selection probability obtained by probability calculation are displayed, and a driver can easily select a destination by selecting a destination from the destination candidates. It has an excellent effect that can be performed.

  Hereinafter, a navigation device according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a navigation device mounted on a vehicle and used will be described as an example.

(First embodiment)
FIG. 1 is a diagram illustrating a configuration of a navigation device 1 according to the present embodiment. As with known navigation devices, the navigation device 1 includes a destination setting unit 26 that sets a destination, a position detection unit 32 that detects the current position of the vehicle, a map information database 30 that stores map information, A route guidance unit 28 is provided for performing route guidance to the destination using the position of the vehicle and the map information.

  The destination setting unit 26 has a function of accepting setting of a destination, and is configured by a remote controller, for example. The position detection unit 32 includes hardware such as a geomagnetic sensor, a gyroscope, a distance sensor, and a GPS receiver, and obtains the current position of the vehicle based on signals from these devices. The map information database 30 stores road information and store information. For example, the map information database 30 may be an information storage medium such as a DVD, or may be configured by a storage device that stores information downloaded through a network. The route guidance unit 28 searches for the optimum route from the current position to the destination, and performs route guidance based on the found route.

  The navigation apparatus 1 according to the present embodiment includes a destination candidate display unit 22 and a destination selection unit 24 in addition to the destination setting unit 26 as an interface for setting a destination. That is, the navigation device 1 of the present embodiment displays destination candidates on the destination candidate display unit 22 and accepts a selection from the displayed destination candidates on the destination selection unit 24. The destination candidate display unit 22 has a function of displaying a place that is likely to be selected by the driver as a destination candidate. The destination candidate display unit 22 is connected to the destination candidate calculation unit 10, and the destination candidate calculation unit 10 calculates destination candidates.

  The destination candidate calculation unit 10 includes a probability inference unit 12 for inferring a destination, and a destination estimation model storage unit 14 for storing a destination estimation model used for performing probability inference. Here, the destination estimation model will be described.

  FIG. 2 is a diagram illustrating an example of the destination estimation model stored in the destination estimation model storage unit 14. The destination estimation model includes a node N1 indicating age and a node N2 indicating occupation as nodes related to driver attributes, and a node N3 indicating day of the week and a node N4 indicating presence / absence of passengers as nodes related to the situation. Contains. The destination estimation model includes a destination candidate node N5. Each of the nodes N1 to N5 is linked to a node N6 indicating the probability that the destination candidate is selected by the driver. This model shows that the selection probability depends on five variables: age, occupation, day of the week, and destination candidate. That is, when a value is set in the nodes N1 to N4 and a destination candidate is set in the node N5, a selection probability that the destination candidate is selected by the driver is obtained.

  The probability reasoning unit 12 stores a driver attribute storage unit 16 that stores attributes such as a driver's age and occupation, a situation detection unit 18 that detects a situation such as a day of the week and the presence of a passenger, and a past destination setting history. Connected to the destination setting history storage unit 20. The probability reasoning unit 12 reads out the age and occupation of the driver from the driver attribute storage unit 16 and sets them in the nodes N1 and N2. The probability reasoning unit 12 obtains information on the day of the week and the presence / absence of passengers from the situation detection unit 18 to obtain the nodes N3 and N4. Set to. Then, the probability reasoning unit 12 sequentially reads and sets locations previously set as destinations in the destination candidate node N5 from the destination setting history storage unit 20, and obtains a selection probability for each location. The calculation of probability inference is performed using a CPT (Conditional Probability Table) indicating the dependency relationship between the nodes N1 to N6.

  The destination estimation model shown in FIG. 2 is an example, and it goes without saying that a model other than that shown in FIG. 2 can be applied to the present invention. For example, the destination candidate may be replaced with a node, and a node indicating the destination attribute may be included. Using this model, the attributes of the destination with a high probability of being selected by the driver are obtained, and the destination that matches the obtained destination attribute is searched from the destination list database provided in the navigation device, etc. Can do. This makes it possible to obtain a place that has never been in the past as a destination candidate.

  The destination candidate display unit 22 has a function of displaying a plurality of destination candidates based on the destination candidates obtained by the probability reasoning unit 12 and their selection probabilities. The destination candidate display unit 22 displays three destination candidates in descending order of selection probability. FIG. 3 is a diagram illustrating a display example of destination candidates displayed by the destination candidate display unit 22. Here, three destination candidates are displayed, but the number of destination candidates to be displayed is not limited to three, and may be four or more, or two. If the number of destination candidates is small, the possibility that the driver wants to go to the destination candidates displayed is low. When the number of destination candidates is large, it is not easy to select from the displayed destination candidates. Therefore, the number of destinations displayed by the destination candidate display unit 22 is preferably 2 to 5, and more preferably 3 to 4.

  In addition, the destination candidate display part 22 displays the destination candidate, when the destination candidate calculated | required in the probability reasoning part 12 is one. In addition, when the destination candidate is not obtained by the probability reasoning unit 12, a display indicating that the destination candidate has not been obtained may be displayed. Alternatively, the destination candidate may not be displayed without displaying that the destination candidate has not been obtained.

  The destination selection unit 24 has a function of accepting selection of one destination from the three destination candidates displayed on the destination candidate display unit 22. In the present embodiment, the destination candidate display unit 22 is configured by a touch panel monitor. For example, the destination selection unit 24 detects that the driver has touched one of the destination candidates on the screen shown in FIG. 3 and receives the selection of the destination. In the present embodiment, the destination selection unit 24 is configured to receive an active input from the driver. However, the destination selection unit 24 selects the selection probability when the vehicle starts traveling without an input from the driver. An option function of automatically selecting the highest destination candidate as the destination may be provided. In addition, this optional function may automatically select a destination only when the selection probability of the destination candidate having the highest selection probability exceeds a predetermined threshold. Thereby, when heading to the destination candidate having the highest selection probability, the driver does not need to operate the navigation device 1 and can contribute to safe driving.

  The navigation device 1 includes an engine operation detection unit 34 that detects the operation of the engine. When detecting the engine operation signal transmitted from the engine control unit 50, the engine operation detection unit 34 notifies the destination candidate calculation unit 10 that the engine has been operated. Thereby, the destination candidate calculation unit 10 sets the destination according to the operation of the engine.

  The navigation device 1 includes a destination change receiving unit 36 that receives a change in destination. When receiving the change of the destination, the destination change receiving unit 36 notifies the destination candidate calculating unit 10 of the change of the destination. Thereby, the destination candidate calculation unit 10 sets the destination in response to receiving the destination change.

  FIG. 4 is a flowchart showing the operation of the navigation device 1 of the present embodiment. First, the navigation device 1 detects the operation of the engine by the engine operation detection unit 34 (S10). When engine operation is not detected (NO in S10), engine operation is repeatedly detected until engine operation is detected (S10).

  When engine operation is detected (YES in S10), the destination candidate calculation unit 10 calculates a destination candidate. Specifically, first, the probability reasoning unit 12 reads out the age and occupation of the driver from the driver attribute storage unit 16 (S12), and acquires information on the day of the week detected by the situation detection unit 18 and the presence or absence of a passenger ( S14). Next, the probability reasoning unit 12 sets the driver's age, occupation, day of the week, and the presence or absence of a passenger in the nodes N1 to N4 of the destination estimation model. Then, the probability inference unit 12 reads out the locations that have been designated as destinations in the past from the destination setting history storage unit 20 and sequentially sets them in the node N5, and obtains the selection probabilities that the respective locations are selected by the driver by probability inference. . The probability reasoning unit 12 obtains three locations with high selection probabilities as destination candidates (S16).

  When a destination candidate having a high selection probability is obtained, the navigation apparatus 1 displays the selected destination candidate by the destination candidate display unit 22 (S18), and selects one destination from the displayed destination candidates. Is selected (S20). When one destination is selected by the driver, the navigation apparatus 1 performs route guidance to the selected destination (S22). The navigation apparatus 1 according to the present embodiment has been described above. The flowchart shown in FIG. 4 shows an example in which the destination is set when the operation of the engine is detected. However, the navigation device 1 according to the present embodiment uses the destination change accepting unit 36 for the purpose. When the change of ground is accepted, destination setting and route guidance (S12 to S22) may be performed.

  The navigation apparatus 1 according to the present embodiment displays three destination candidates on the destination candidate display unit 22 and accepts selection of one destination from the displayed destination candidates. The number of destination candidates displayed by the destination candidate display unit 22 is a number that allows the driver to grasp the destination candidates at a glance, and the destination can be easily set by a simple interface.

  In addition, the configuration in which the destination is selected from the plurality of destination candidates makes the driver aware that the destination is set by the driver's own intention rather than the destination being selected by the navigation device 1. Therefore, it has an effect of easily accepting any of the displayed destination candidates. In order to achieve this effect, it is preferable to display a plurality of destination candidates even if the selection probability of one destination candidate is prominently high.

  The navigation device 1 according to the present embodiment displays a plurality of destination candidates obtained by the probability reasoning by the destination candidate calculation unit 10, so that a destination is selected from the displayed destination candidates. The possibility is high and the destination can be set quickly.

  The navigation device 1 according to the present embodiment displays a destination candidate when the operation of the engine is detected and selects a destination, so that appropriate route guidance can be performed from the start of traveling of the vehicle.

  The navigation device 1 according to the present embodiment displays a destination candidate when the destination change accepting unit 36 accepts a change of the destination, and allows the destination to be selected. You can set the destination.

(Second Embodiment)
FIG. 5 is a diagram showing the navigation device 2 according to the second embodiment of the present invention. The navigation device 2 of the second embodiment has the same basic configuration as the navigation device 1 of the first embodiment, but differs in that it further includes a guidance mode storage unit 38. The navigation device 2 according to the second embodiment controls the route guidance mode based on the information stored in the guidance mode storage unit 38.

  FIG. 6 is a diagram illustrating an example of information stored in the guidance mode storage unit 38. The guidance mode storage unit 38 stores information on two guidance modes, “normal guidance mode” and “suppression guidance mode”. Each guidance mode prescribes whether or not to perform “peripheral map display”, “direction voice instruction”, “landmark information voice notification”, and “traffic information voice notification”. “Nearby map display” is a function for displaying a map around the current position of the vehicle on the monitor. “Directional voice instruction” is a function that provides voice guidance to the driver on the route to the destination. For example, when a right turn is planned in the route, the voice guidance such as “turn right 300m ahead” is given. “Landmark information voice notification” is a function for notifying the driver of the presence of a landmark by voice. “Traffic information voice notification” is a function for notifying the driver of traffic jam information, accident information, and the like.

  The “normal guidance mode” is a guidance mode that provides all information related to route guidance, that is, all information of “display of surrounding map”, “direction voice instruction”, “landmark information voice notification” and “traffic information voice notification” to the driver . The “suppression guidance mode” is a mode in which not all information is provided to the driver, but provision of some information, that is, “direction voice instruction” and “landmark information voice notification” is suppressed.

  In FIG. 6, four examples of “route map display”, “route voice instruction”, “landmark information voice notification”, and “traffic information voice notification” are illustrated as route guidance functions, but can be controlled by the guidance mode. The function is not limited to these. In FIG. 6, the guidance mode storage unit 38 has two guidance modes, but may store three or more guidance modes.

  FIG. 7 is a flowchart illustrating the operation of the navigation device 2 according to the second embodiment. The navigation device 2 of the second embodiment is the same as the navigation device 1 of the first embodiment in operation until the destination is set. In FIG. 7, the description of steps S10 to S14 shown in FIG. 4 is omitted. In the navigation device 2 of the second embodiment, the destination candidate calculation unit 10 obtains a plurality of destination candidates and their selection probabilities (S16), and displays the obtained destination candidates (S18). Then, the navigation device 1 accepts selection of one destination from the displayed plurality of destination candidates (S20).

  When the navigation device 1 accepts the selection of the destination, the navigation device 1 compares the selection probability of the selected destination with a predetermined threshold (S24). If the selection probability is equal to or higher than the predetermined threshold (YES in S24), the route guidance unit 28 performs route guidance in the suppression guidance mode (S26). The route guidance unit 28 reads information on the suppression guidance mode from the guidance mode storage unit 38 and performs route guidance according to the read information. If the selection probability is smaller than the predetermined threshold (NO in S24), the route guidance unit 28 performs route guidance in the normal guidance mode (S28). Information on the normal guidance mode is read from the guidance mode storage unit 38, and route guidance is performed according to the read information.

  According to the second embodiment, the following problems of the conventional navigation device can be solved. In other words, in the conventional navigation apparatus, when route guidance is started, the same guidance is provided wherever it goes. Even if the driver is accustomed to the road, voice guidance such as “Turn right at 300m” or “Turn left at the next traffic light” was given, which was rather troublesome. On the other hand, if route guidance is not performed at all, it is inconvenient because traffic information such as which road is busy on that day cannot be obtained.

  The navigation device 2 according to the second embodiment has two route guidance modes, a suppression guidance mode and a normal guidance mode, and selects a route guidance mode according to the selection probability of the selected destination. If the selection probability is high, the destination is a place where the driver goes frequently, and it is determined that he / she knows the route to the destination well, so in the suppression guidance mode that suppresses the voice guidance of the route and landmark By performing route guidance, it is possible to drive comfortably without being bothered by route guidance. On the other hand, when the selection probability is low, it is determined that the destination is an unguided place where the driver does not go so much, so that the arrival at the destination can be supported by performing normal route guidance.

  In the second embodiment, the example in which the route guidance is performed in the suppression guidance mode when the selection probability is equal to or greater than the predetermined threshold has been described, but the route candidate selected from the destination candidates displayed on the destination candidate display unit 22 is selected. In this case, the route guidance may be performed in the suppression guidance mode, and the route guidance may be performed in the normal guidance mode when the destination is set by the destination setting unit 26 as in the conventional navigation device.

  In the second embodiment, the suppression guidance mode and the normal guidance mode are determined according to the selection probability. However, in the navigation device 1 having a function of registering frequently visited places in advance, the registered place is the purpose. When set as the ground, route guidance may be performed in the suppression guidance mode. When “home” is set as the destination, control for switching to the suppression guidance mode may be performed near the home.

(Third embodiment)
FIG. 8 is a diagram illustrating a configuration of the navigation device 3 according to the third embodiment. The navigation device 3 according to the third embodiment includes a traffic information receiving unit 40 that receives traffic information in addition to the configuration of the navigation device 2 according to the second embodiment.

  The traffic information receiving unit 40 has a function of receiving traffic information from VICS, for example. The traffic information receiving unit 40 notifies the route guide unit 28 of the received traffic information. Based on the traffic information notified from the traffic information receiving unit 40, the route guide unit 28 determines whether or not a traffic fault has occurred on the route being guided. When it is determined that a traffic obstacle has occurred on the route, the route guidance unit 28 searches for a route that avoids the traffic obstacle and performs route guidance on the searched new route.

  In the navigation device 3 according to the third embodiment, when the route guidance unit 28 searches for a new route that avoids a traffic obstacle while performing route guidance in the suppression guidance mode, the route guidance unit 28 Then, switch from the suppression guidance mode to the normal guidance mode. By adopting such a configuration, the navigation device 3 according to the third embodiment can appropriately guide the driver to the destination even when a traffic fault occurs. In other words, if a traffic obstacle occurs, even a driver who knows the route to the destination does not know what route to follow to avoid traffic jams caused by the traffic obstacle. Therefore, it is possible to guide the destination appropriately by guiding the route that avoids the newly searched traffic obstacle in the normal guidance mode.

(Fourth embodiment)
FIG. 9 is a diagram illustrating a configuration of the navigation device 4 according to the fourth embodiment. In addition to the configuration of the navigation device 1 of the first embodiment, the navigation device 4 of the fourth embodiment includes a route departure detection unit 42 that detects that the vehicle has deviated from the route.

  The route departure detection unit 42 detects a departure from the vehicle route by comparing the route to the destination searched by the route guide unit 28 and the current position of the vehicle. The route departure detection unit 42 may detect a route departure when the current position of the vehicle deviates from the route, or detects a route departure when a state where the current position of the vehicle deviates from the route continues for a predetermined time. May be. In the case of the latter detection method, the navigation device 4 may output a message such as “I have left the route” for a predetermined time, and prompt the driver to return to the route.

  When the departure from the vehicle is detected, the route departure detection unit 42 notifies the route guidance unit 28 or the destination candidate calculation unit 10 of the departure from the route. The route departure detection unit 42 notifies the route guidance unit 28 of the route departure until the number of detections of the route departure reaches a predetermined number of times, and if the number of detections of the route departure exceeds the predetermined number of times, the route departure detection unit 42 Is notified to the destination candidate calculation unit 10. Here, the “predetermined number of times” can be appropriately set depending on the configuration of the navigation device 4.

  When the route guidance unit 28 receives a route departure notification from the route departure detection unit 42, the route guidance unit 28 re-searches the route from the current position of the vehicle to the destination and sets a new route. When the destination candidate calculation unit 10 receives a route deviation notification from the route departure detection unit 42, the destination candidate calculation unit 10 performs a process for obtaining a destination candidate again. Thereafter, the navigation device displays the obtained destination candidates and causes the driver to select a destination.

  FIG. 10 is a diagram illustrating an operation of the navigation device 4 according to the fourth embodiment. FIG. 10 shows an operation after the route guidance (S22) is started by the operation shown in FIG. The navigation device 4 detects whether or not the vehicle has deviated from the route by the route departure detection unit 42 (S30). If the route departure detection unit 42 does not detect a departure from the route (NO in S30), the navigation device 4 continues route guidance to the destination and periodically detects whether or not the route has deviated. (S30).

  When the departure from the route is detected (YES in S30), the route departure detection unit 42 counts up the number of route departures (S32) and determines whether or not the number of route departures has reached a predetermined number (S32). S34). If the number of departures from the route has not reached the predetermined number (NO in S34), the navigation device 4 re-searches the route from the current position of the vehicle to the destination (S36) and performs route guidance (S42). When the number of departures from the route reaches a predetermined number (YES in S34), the navigation device 4 resets the destination (S38). The navigation device 4 resets the destination by executing steps S12 to S20 shown in FIG. 4 (S38). After the destination is reset, the navigation device 4 resets the number of departures from the route (S40), and performs reset route guidance to the newly set destination (S42). The navigation device 4 repeatedly performs the operation shown in FIG. 10 until the vehicle arrives at the destination.

  In the navigation device 4 of the fourth embodiment, the route departure detection unit 42 detects a departure from the route of the vehicle, and resets the destination when the number of times the vehicle has departed from the route reaches a predetermined number. . With this configuration, when a change in destination is detected due to deviation from the route, the navigation device 4 displays a new destination candidate and accepts a selection of one destination from the displayed destination candidates. You can easily set the destination after the change. That is, when the driver changes the destination, if the driver heads in the direction of the destination he / she wants to go to, a new destination candidate is displayed by the navigation device 4, and the driver only has to select a destination from the destination. So you can safely set your destination even while driving.

  In the fourth embodiment, when the route departure detection unit 42 detects a departure from the vehicle route, the destination may be reset without looking at the number of route departures. With this configuration, it is possible to quickly detect a change of the destination and reset the destination.

  In the fourth embodiment, the destination is reset according to the departure from the route. However, the change of the destination may be detected by a method other than detecting the departure from the route. For example, when a distance calculation unit that calculates the distance between the current position of the vehicle and the destination based on the map information is provided, and it is detected that the distance calculated by the distance calculation unit has expanded over time A configuration for resetting the destination can be employed. When the distance between the current position of the vehicle and the destination increases, it can be determined that the destination has changed because the vehicle is moving away from the destination. In this configuration, it may be determined that the destination is changed when the distance increase continues for a predetermined time. With this configuration, it is possible to avoid the inconvenience of erroneously detecting the change of the destination when the vehicle is temporarily away from the destination by a road that is away from the destination in a part of the route.

  The navigation device of the present invention has been described in detail with reference to the embodiment, but the present invention is not limited to the above-described embodiment.

  In the above-described embodiment, the probability reasoning unit 12 reads out locations that have been designated as destinations in the past from the destination setting history storage unit 20 and obtains the selection probabilities for the respective locations. You may choose a destination candidate from That is, a place where the vehicle has stopped for a predetermined time or more may be stored as a place visited in the past, and a destination candidate may be selected from the places. Thereby, destination candidates can be selected from places other than those previously set as destinations.

  In the second embodiment described above, an example in which a plurality of destination candidates are displayed by the destination candidate display unit 22 and the guidance mode is changed according to the selection probability when a destination is selected from the destination candidates. However, it is possible to control the guidance mode without adopting a configuration for selecting a destination from a plurality of destination candidates.

  For example, the destination candidate calculation unit calculates one destination candidate, and when the selected destination candidate selection probability is equal to or higher than a predetermined threshold, the suppression guidance mode in which provision of some information is suppressed is set. Route guidance to the destination candidate may be performed.

  In addition, the destination candidate calculation unit calculates one destination candidate, displays the calculated destination, and adopts a configuration in which the driver accepts the selection of whether or not to accept the destination candidate. When a ground candidate is accepted, route guidance may be performed in the suppression guidance mode.

  In addition, in a navigation device equipped with a “route learning function” for storing a destination and a route when the vehicle goes through the same route continuously to the same destination a plurality of times, the searched route is If the route learned by the route learning function matches the route, route guidance may be performed in the suppression guidance mode. Note that the route learning function normally memorizes the route when it passes the same route several times in succession when going to the same destination. It is good also as a structure which can be set.

  Alternatively, the destination, route, and date / time of the vehicle that the vehicle has made in the past may be stored as a history, and it may be determined whether to enter the suppression guidance mode or the normal guidance mode based on the history information. For example, the navigation device determines whether the route searched by the route guide unit is the same route at the same destination and has been performed three times or more in the past month, and is determined to be performed The route guidance is performed in the suppression guidance mode, and the route guidance is performed in the normal guidance mode when it is determined that the route guidance is not performed. Note that the period of “past one month” and the number of times of “three times” mentioned in this example are examples and can be set as appropriate.

  In the third embodiment described above, when the occurrence of a traffic fault is detected during the route guidance in the suppression guidance mode, a route that avoids the traffic obstacle is searched, and the mode is switched from the suppression guidance mode to the normal guidance mode. Although an example of performing route guidance on the searched route is described, switching from the suppression guidance mode to the normal guidance mode may be performed at a timing other than detecting a traffic fault. For example, if it is detected during the route guidance to a certain destination that the driver is not heading to that destination, the route may be switched from the suppression guidance mode to the normal guidance mode and route guidance to a new destination may be performed. Good. If the destination is changed halfway, even if the newly set destination is a frequent destination, the route may not be known. Can be guided to.

  In the above-described embodiment, the example in which the destination candidate calculation unit 10 estimates the destination using the Bayesian network model stored in the destination estimation model storage unit 14 has been described. Any method may be used as long as it is a method for obtaining candidate destinations and their selection probabilities.

  In the above-described embodiment, selection of a destination is received from among a plurality of destination candidates obtained by the destination candidate calculation unit 10, and route guidance to the destination is performed. The route guidance may be stopped when the destination is set by the place setting unit 26 or when a guidance stop switch (not shown) is pressed. In the navigation device described above, a switch for turning off the function of displaying the destination candidate may be provided. Thereby, when it is not necessary to display the destination candidate, the destination candidate can be set by a conventional method.

  In the above-described embodiment, the navigation device and the operation thereof have been described. However, the present invention includes a program that causes a computer to execute processing by the above-described navigation device.

  The present invention has an excellent effect that a destination can be selected by a very simple interface of selecting a destination from candidate destinations, and is useful as a navigation device mounted on a vehicle.

It is a figure which shows the navigation apparatus of 1st Embodiment. It is a figure which shows the example of the destination estimation model. It is a figure which shows the example of a display of the destination candidate by the destination candidate display part. It is a figure which shows operation | movement of the navigation apparatus of 1st Embodiment. It is a figure which shows the navigation apparatus of 2nd Embodiment. It is a figure which shows the example of the information memorize | stored in the guidance mode information storage part. It is a figure which shows operation | movement of the navigation apparatus of 2nd Embodiment. It is a figure which shows the navigation apparatus of 3rd Embodiment. It is a figure which shows the navigation apparatus of 4th Embodiment. It is a figure which shows operation | movement of the navigation apparatus of 4th Embodiment.

Explanation of symbols

1, 2, 3, 4 Navigation device 10 Destination candidate calculation unit 12 Probability reasoning unit 14 Destination estimation model storage unit 16 Driver attribute storage unit 18 Situation detection unit 20 Destination setting history storage unit 22 Destination candidate display unit 24 Purpose Location selection unit 26 Destination setting unit 28 Route guidance unit 30 Map information database 32 Position detection unit 34 Engine operation detection unit 36 Destination change reception unit 38 Guide mode storage unit 40 Traffic information reception unit 42 Route departure detection unit 50 Engine control unit

Claims (9)

A destination candidate calculation unit for obtaining a selection probability by which a plurality of destination candidates and respective destination candidates are selected by the driver by probability calculation;
Determining a plurality of number of the destination candidates to be displayed in accordance with the selection probability, the one of the plurality of destination candidates determined by the destination candidate calculation unit, of the number in order from the higher the selection probability A destination candidate display section for selecting a destination candidate and displaying a plurality of selected destination candidates on one screen;
A destination selection unit that accepts selection of one destination from destination candidates displayed on the destination candidate display unit;
A route guidance unit for performing route guidance to the destination selected by the destination selection unit;
A route departure detecting unit for detecting that the vehicle has deviated from the route to the destination searched by the route guiding unit;
With
The route guidance unit re-searches the route from the current position of the vehicle to the destination when the departure from the route is detected by the route departure detection unit, and performs route guidance using the newly searched route. Done
The destination candidate calculating unit obtains the destination candidate and its selection probability when the route departure detecting unit detects a predetermined number of departures. A destination candidate calculation unit for obtaining a selection probability by which a plurality of destination candidates and respective destination candidates are selected by the driver by probability calculation;
Determining a plurality of number of the destination candidates to be displayed in accordance with the selection probability, the one of the plurality of destination candidates determined by the destination candidate calculation unit, of the number in order from the higher the selection probability A destination candidate display section for selecting a destination candidate and displaying a plurality of selected destination candidates on one screen;
A destination selection unit that accepts selection of one destination from destination candidates displayed on the destination candidate display unit;
A route guidance unit for performing route guidance to the destination selected by the destination selection unit;
A route departure detecting unit for detecting that the vehicle has deviated from the route to the destination searched by the route guiding unit;
With
The destination candidate calculation unit is a navigation device that obtains the destination candidate and its selection probability when the departure from the route is detected by the route departure detection unit. An engine operation detection unit for detecting the engine operation of the vehicle;
The navigation device according to claim 1, wherein the destination candidate calculation unit obtains the destination candidate and its selection probability when the engine operation detection unit detects the operation of the engine. It has a distance calculation unit that calculates the distance between the current position of the vehicle and the destination,
The navigation device according to claim 1, wherein the destination candidate calculation unit obtains the destination candidate and its selection probability when the distance calculated by the distance calculation unit increases with time. It has a destination change acceptance unit that accepts destination changes,
The navigation device according to claim 1, wherein the destination candidate calculation unit obtains the destination candidate and its selection probability when the destination change accepting unit accepts a destination change. A navigation method for route guidance to a destination,
A navigation apparatus, a destination candidate calculation step for obtaining a selection probability that a plurality of destination candidates and respective destination candidates are selected by a driver by probability calculation;
The navigation device determines the number of destination candidates to be displayed according to the selection probability, and has the higher selection probability among the plurality of destination candidates obtained in the destination candidate calculation step. In order from the above , a destination candidate display step for selecting the number of destination candidates and displaying the selected plurality of destination candidates on one screen;
The navigation device receives a selection of one destination from the destination candidates displayed in the destination candidate display step;
A route guidance step in which the navigation device performs route guidance to the destination selected in the destination selection step;
A route departure detecting step in which the navigation device detects that the vehicle has deviated from the route to the destination searched in the route guiding step;
With
In the route guidance step, when a departure from the route is detected in the route departure detection step, the route from the current position of the vehicle to the destination is re-searched, and the route guidance is performed on the newly searched route. Done
The destination candidate calculation step is a navigation method for obtaining the destination candidate and its selection probability when a predetermined number of departures are detected in the route departure detection step. A navigation method for route guidance to a destination,
A navigation apparatus, a destination candidate calculation step for obtaining a selection probability that a plurality of destination candidates and respective destination candidates are selected by a driver by probability calculation;
The navigation device determines the number of destination candidates to be displayed according to the selection probability, and has the higher selection probability among the plurality of destination candidates obtained in the destination candidate calculation step. In order from the above , a destination candidate display step for selecting the number of destination candidates and displaying the selected plurality of destination candidates on one screen;
The navigation device receives a selection of one destination from the destination candidates displayed in the destination candidate display step;
A route guidance step in which the navigation device performs route guidance to the destination selected in the destination selection step;
A route departure detecting step in which the navigation device detects that the vehicle has deviated from the route to the destination searched in the route guiding step;
With
The destination candidate calculating step is a navigation method for obtaining the destination candidate and its selection probability when a deviation from the route is detected in the route departure detecting step. A program that provides route guidance to a destination.
A destination candidate calculation step for obtaining a selection probability that a plurality of destination candidates and respective destination candidates are selected by the driver by probability calculation;
Determining a plurality of number of the destination candidates to be displayed in accordance with the selection probability, among the plurality of destination candidates determined by the destination candidate calculation step, in order from the higher the selection probability, the number A destination candidate display step of selecting a destination candidate for the destination and displaying the selected plurality of destination candidates on one screen;
A destination selection step for receiving selection of one destination from the destination candidates displayed in the destination candidate display step;
A route guidance step for performing route guidance to the destination selected in the destination selection step;
A route departure detection step for detecting that the vehicle has deviated from the route to the destination searched in the route guidance step;
And execute
In the route guidance step, when a departure from the route is detected in the route departure detection step, the route from the current position of the vehicle to the destination is re-searched, and the route guidance is performed on the newly searched route. Done
The destination candidate calculation step is a program for obtaining the destination candidate and its selection probability when a predetermined number of departures are detected in the route departure detection step. A program that provides route guidance to a destination.
A destination candidate calculation step for obtaining a selection probability that a plurality of destination candidates and respective destination candidates are selected by the driver by probability calculation;
Determining a plurality of number of the destination candidates to be displayed in accordance with the selection probability, among the plurality of destination candidates determined by the destination candidate calculation step, in order from the higher the selection probability, the number A destination candidate display step of selecting a destination candidate for the destination and displaying the selected plurality of destination candidates on one screen;
A destination selection step for receiving selection of one destination from the destination candidates displayed in the destination candidate display step;
A route guidance step for performing route guidance to the destination selected in the destination selection step;
A route departure detection step for detecting that the vehicle has deviated from the route to the destination searched in the route guidance step;
And execute
The destination candidate calculating step is a program for obtaining the destination candidate and its selection probability when a deviation from the route is detected in the route departure detecting step.

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