JP5795706B2 - Navigation device - Google Patents

Description

  The present invention relates to a navigation device mounted on a vehicle.

  Conventionally, a navigation device that searches for a route to a set destination and guides the vehicle to the destination according to the route has been put into practical use. In such a navigation apparatus, when a vehicle deviates from a route, a reroute process for automatically re-searching a route from the departure point to the destination is widely performed (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 10-153446

  As disclosed in Patent Document 1, in the conventional reroute process, when the vehicle deviates from the route, a route to a preset destination is automatically re-searched. However, there are cases where a user driving a vehicle travels independently from the route for a purpose such as a detour. If reroute processing is performed in such a case, route guidance unnecessary for the user is performed, which is troublesome. Further, when the route to the destination is not set, the reroute process is not executed, and thus the guidance information cannot be provided.

  In view of the circumstances as described above, an object of the present invention is to provide guidance information useful for a user according to a situation.

A navigation device according to the present invention is mounted on a vehicle, and includes map data and determination means for determining whether a situation where the vehicle is placed satisfies any one of a plurality of predetermined generation conditions. When the determination means determines that the situation of the vehicle satisfies any one of a plurality of proposal generation conditions, the proposal means for making a proposal according to the proposal generation conditions, and the purpose of the vehicle based on the proposal Route searching means for setting a place or waypoint and searching for a route according to the destination or waypoint; and providing means for providing guidance information to the destination or waypoint according to the route searched by the route search means; , and a desired arrival time setting means for setting a desired arrival time at the destination, the proposed means is, if the current time is later than the desired arrival time, a proposal to encourage the change of the desired arrival time to the user , If the current time is earlier than the desired arrival time, the facility corresponding to the current time and the stop time according to the time difference between the desired arrival time to search on the basis of the map data, characterized in that it proposes a search result .

  ADVANTAGE OF THE INVENTION According to this invention, useful guide information for a user can be provided according to a condition.

It is a figure which shows the structure of the navigation apparatus by one Embodiment of this invention. It is the table | surface which showed an example of proposal generating conditions and the proposal content. It is a flowchart of a proposal guidance process.

  FIG. 1 shows the configuration of a navigation device according to an embodiment of the present invention. The navigation device 1 is used by being mounted on a vehicle, and includes a control unit 10, a vibration gyro 11, a vehicle speed sensor 12, a hard disk (HDD) 13, a GPS (Global Positioning System) receiving unit 14, a VICS (Vehicle Information and). Communication System) (registered trademark) information receiving unit 15, display monitor 16, speaker 17, and input device 18.

  The control unit 10 includes a microprocessor, various peripheral circuits, a RAM, a ROM, and the like, and executes various processes based on a control program and map data recorded in the HDD 13. Various processes for guiding the host vehicle to the destination are executed by the process performed by the control unit 10. For example, destination search processing when setting a destination, search processing for a recommended route to the set destination, calculation processing of the current position of the host vehicle, various image display processing, voice output processing during route guidance Etc. are executed. Further, a proposal guidance process to be described later is also executed by the control unit 10.

  The communication terminal 2 is connected to the control unit 10. The control unit 10 can control the communication terminal 2 to connect to an external server via a wireless communication line (not shown) and obtain various information recorded in the server as necessary. . For example, a mobile phone can be used as the communication terminal 2.

  The vibration gyro 11 is a sensor for detecting the angular velocity of the host vehicle. The vehicle speed sensor 12 is a sensor for detecting the vehicle speed of the host vehicle. By detecting the motion state of the host vehicle at predetermined time intervals using these sensors, the position movement amount of the host vehicle is obtained, and thereby the current position of the host vehicle is calculated.

  The HDD 13 is a non-volatile recording medium that can store and hold recorded data. Various data including the control program and map data are recorded in the HDD 13. These data recorded in the HDD 13 are read out under the control of the control unit 10 as necessary, and are used for various processes and controls executed by the control unit 10.

  The map data recorded on the HDD 13 includes route calculation data, road data, and background data. The route calculation data is data used when searching for a recommended route to the destination. The road data is data representing the shape and type of the road. In the map data, the minimum unit of each road is called a link. That is, each road in the map data is composed of a plurality of links. The background data is data representing the background of the map. Note that the background of the map is various components other than roads existing on the map. For example, rivers, railways, green zones, various structures, etc. are represented by background data.

  The map data includes POI (Point Of Interest) data related to various types of facilities. For example, information on types and positions of various facilities such as accommodation facilities such as inns and hotels, restaurants, gas stations, and convenience stores is recorded in the POI data. Based on this POI data, an icon corresponding to the type of facility is displayed on the map.

  The GPS receiver 14 receives a GPS signal transmitted from a GPS satellite and outputs it to the controller 10. The GPS signal includes information on the position and transmission time of the GPS satellite that transmitted the GPS signal as information for obtaining the position of the host vehicle and the current time. Therefore, by receiving GPS signals from a predetermined number or more of GPS satellites, the current position and current time of the host vehicle can be calculated based on these pieces of information. The GPS receiver 14, the vibration gyro 11 and the vehicle speed sensor 12 described above detect the own vehicle position, that is, the current position of the own vehicle.

  The VICS information receiving unit 15 receives VICS information transmitted from the VICS center to the navigation device 1. When the VICS information receiving unit 15 receives this VICS information, various road traffic information including traffic jam information is acquired in the navigation device 1. The VICS information received by the VICS information receiving unit 15 is output to the control unit 10.

  The transmission of VICS information from the VICS center to the navigation device 1 is performed mainly by radio wave beacons installed on highways, optical beacons installed mainly on general roads, or FM multiplex broadcasting. . The radio wave beacon and the optical beacon transmit VICS information locally to the vehicle passing near the installation point by radio waves or light (infrared rays). In contrast, FM multiplex broadcasting can transmit VICS information to a relatively wide area.

  The display monitor 16 is a device for displaying various screens in the navigation device 1 and is configured using a liquid crystal display or the like. For example, a map around the current position of the vehicle is displayed on the display monitor 16. The contents of the screen displayed on the display monitor 16 are determined by screen display control performed by the control unit 10. The display monitor 16 is installed at a position where the user can easily see, for example, on the dashboard of the host vehicle or in the instrument panel. The speaker 17 outputs various sounds such as route guidance sound under the control of the control unit 10.

  The input device 18 is a device for a user to perform various input operations for operating the navigation device 1 and includes various input switches. The user operates the input device 18 to input, for example, the name of a facility or point desired to be set as a destination, select a destination from registered locations registered in advance, or display a map in an arbitrary direction. Or scroll. The input device 18 can be realized by an operation panel, a remote controller, or the like. Alternatively, the input device 18 may be a touch panel integrated with the display monitor 16.

  When the user operates the input device 18 to set a destination, the navigation device 1 performs a predetermined algorithm operation based on the above-described route calculation data using the current position of the host vehicle as the departure point, thereby Route search from to the destination. The route obtained by this route search is set as a recommended route to the destination. When the recommended route is set in this way, the recommended route is displayed on the map separately from other roads by a method such as using a color different from that of the other roads. Thereby, the user can easily recognize the recommended route on the map displayed on the display monitor 16. Further, in order to allow the user to drive the vehicle according to the recommended route, the navigation device 1 instructs the guidance intersection to be bent next or the guidance by the screen display of the display monitor 16 or the sound output from the speaker 17. The user is instructed in the direction of travel at the intersection. By providing such guidance information from the navigation device 1, route guidance to the destination is performed.

  Next, the proposal guidance process performed in the navigation apparatus 1 is demonstrated. The navigation device 1 determines whether or not the situation of the host vehicle satisfies any of the various proposal generation conditions set in advance, and proposes various contents to the user according to the determination result. I do. Note that the proposal from the navigation device 1 to the user can be made by screen display of the display monitor 16 or voice output from the speaker 17. When the user responds to such a proposal by operating the input device 18 or the like, the navigation device 1 sets the destination or waypoint of the host vehicle based on the response, and guides the host vehicle to the destination or waypoint. Providing guidance information for Thereby, guidance information useful for the user is provided according to the situation.

  An example of proposal generation conditions and proposal contents in the proposal guidance process is shown in the table of FIG. In this table, “continuous running time”, “fuel shortage”, “route departure”, and “detour” are defined as proposal generation conditions. “Departures” are classified into “meal time zone”, “with desired arrival time” and “no desired arrival time”, and “with desired arrival time” is “slow”, “slightly early”, “ “Early”, “substantially early”, and “no desired arrival time” are classified into “high frequency” and “low frequency”, respectively. Each of these proposal generation conditions and the contents of the proposal will be described in detail below.

(1) Continuous travel time The total travel time from the last start of the engine of the host vehicle to the present is obtained as the continuous travel time of the host vehicle, and when this exceeds a predetermined threshold, for example, 2 hours, The navigation apparatus 1 determines that the proposed travel condition for the continuous travel time is satisfied. In this case, in order to encourage the user who is a driver to take a break, a resting facility existing within a predetermined range from the current position of the vehicle is searched based on the map data recorded in the HDD 13, and the search result is proposed. To do. For example, facilities such as a highway service area, a parking area, a road station, a resting place, and a drive-in can be proposed as resting facilities. Note that the threshold value may be changed according to the travel distance after the engine is started, the traffic congestion on the road, the length of the last break, and the like.

(2) Insufficient fuel When the amount of remaining fuel in the host vehicle falls below a predetermined threshold value, the navigation apparatus 1 determines that the proposed fuel shortage condition is satisfied. In this case, in order to promote fuel supply to the host vehicle, a fuel supply facility existing within a predetermined range from the current position of the host vehicle is searched based on the map data recorded in the HDD 13, and the search result is proposed. For example, when the fuel of the host vehicle is gasoline or light oil, a gas station is proposed as a fuel supply facility, and when the host vehicle is an electric vehicle, a quick charging facility or the like is proposed as a fuel supply facility. In addition, when the recommended route to the destination is set as described above, the fuel usage amount from the current position of the vehicle to the destination is predicted based on the recommended route, and the above-mentioned fuel usage amount is calculated based on the predicted fuel usage amount. The threshold value may be determined.

(3) Route Deviation When a recommended route to the destination is set in advance, and when it is considered that the host vehicle has deviated from the recommended route due to carelessness of the user, the navigation device 1 sets the route departure proposal generation condition. It is determined that it satisfies. In this case, by performing route re-search (reroute), the route from the current position of the host vehicle after the departure from the route to the destination is searched, and the searched route is proposed as a new recommended route.

  For example, when the host vehicle deviates from the recommended route within a predetermined distance range from the guidance intersection, it is determined that the route departure is due to carelessness of the user, and it is determined that the route departure proposal generation condition is satisfied. On the other hand, when the host vehicle deviates from the recommended route outside the predetermined distance range from the guidance intersection, it is determined that the route departure is not due to the carelessness of the user, and it is determined that the route departure suggestion generation condition is not satisfied. It should be noted that, even in other situations, it may be determined that the route generation suggestion generation condition is satisfied if the vehicle is considered to have deviated from the recommended route due to carelessness of the user. If the vehicle deviates from the recommended route, the user is inquired as to whether the route departure is inadvertent, and determines whether or not the route departure proposal generation condition is satisfied according to the response result. Also good.

(4) Detour A situation in which the user is considered to take a detour is determined in advance, and when it is determined that this situation corresponds, the navigation apparatus 1 determines that the detour proposal generation condition is satisfied. For example, when it is considered that the vehicle deviates from the recommended route due to the user's own intention, that is, when the vehicle deviates from the recommended route without satisfying the above-mentioned route departure suggestion generation condition (predetermined from the guidance intersection) When the vehicle deviates from the recommended route outside the distance range), or when the current position of the vehicle approaches a certain distance range from a specific sightseeing spot, the vehicle passes through the interchange and goes from the expressway to the general road. It is possible to determine that the proposed generation condition for the detour is satisfied when getting off. That is, it is possible to determine whether or not a detour proposal generation condition is satisfied from the positional relationship between the current position of the host vehicle and a preset recommended route, sightseeing spot, or expressway.

  The specific sightseeing spot used in the above determination may be a well-known famous sightseeing spot or may be determined based on preference conditions arbitrarily set by the user. For example, when a hot spring area is set as a preference condition, in addition to a predetermined famous hot spring area, a hot spring area that is not so famous can be determined.

  If it is determined that the proposed generation condition for the detour is satisfied based on the determination conditions as described above, the navigation device 1 determines which of the situations described in (a) to (g) below is applicable. And make proposals according to the judgment results.

(A) In the case of a meal time zone It is determined whether or not the current time belongs to a preset meal time zone, and if it belongs to a meal time zone, a restaurant or the like existing within a predetermined range from the current position of the host vehicle Are searched based on the map data recorded in the HDD 13, and the search result is proposed. At this time, it is preferable to set the priority order of proposal according to the kind etc. with respect to each searched eating establishment, and to propose each eating establishment searched according to the priority order. For example, the highest priority is set for a restaurant that is registered in advance as a registration point by the user, and then the next highest priority is set for a restaurant that has visited in the past. Moreover, the next highest priority is set with respect to the restaurant of the genre with the high selection frequency in the facility search for every genre performed in the navigation apparatus 1 in the past, and the food and drink corresponding to the preference conditions arbitrarily set by the user Set the next highest priority for the store. The lowest priority is set for restaurants that do not meet any of these conditions. Alternatively, what is the special dish in the area may be stored in advance in the map data, and the restaurant that provides the special dish may be preferentially proposed.

(B) When it is later than the desired arrival time The navigation apparatus 1 can set the time designated in advance by the user as the desired arrival time at the destination. The desired arrival time is compared with the current time, and if the current time is later than the desired arrival time, that is, if the desired arrival time has already passed, a proposal is made to prompt the user to change the desired arrival time. Furthermore, in the same manner as when the above-mentioned route departure proposal occurrence condition is satisfied, route re-search is performed to search again the route from the current position of the host vehicle to the destination, and the searched route is set as a new recommended route. suggest. At this time, the traffic route may be proposed as a new recommended route only when a traffic jam has occurred in the recommended route that has already been set and a route that avoids the traffic jam can be searched.

(C) When slightly earlier than the desired arrival time On the other hand, when the current time is earlier than the desired arrival time, the time difference between the two times is calculated, and the time difference and a predetermined threshold T1 (for example, 30 minutes) ). As a result, if the time difference is less than T1, it is determined that the time is slightly earlier than the desired arrival time, and a facility or the like corresponding to that is proposed. Here, out of various facilities existing within a predetermined distance from the current position of the host vehicle, a facility corresponding to a short-term sightseeing stop is searched based on the map data recorded in the HDD 13, and the search result is proposed. To do. For example, a resting facility similar to the above-described conditions for generating the continuous travel time, or a tourist facility such as a specialty store selling products such as local specialties and special products are proposed. It is also possible to make a proposal according to the feature of the product, such as by preferentially proposing a facility that deals with a product with a limited sales location or sales time. In any case, it is important to make a proposal for the user not to regret this when the user does not stop at the facility because the user does not know the existence of the facility that matches the user's desire.

(D) When earlier than the desired arrival time When the time difference between the current time and the desired arrival time is equal to or greater than the threshold value T1, the time difference and a predetermined threshold value T2 (T2> T1, for example, 2 hours) And compare. As a result, when the time difference is equal to or greater than T1 and less than T2, it is determined that the time is earlier than the desired arrival time, and a facility or the like corresponding to the time is proposed. Here, a facility corresponding to a stop for a medium-time sightseeing purpose among various facilities existing within a predetermined distance from the current position of the host vehicle is searched based on the map data recorded in the HDD 13, and the search result Propose. For example, in addition to the above-mentioned specialty store, the registration point registered in advance by the user, the stop point that has been visited in the past, the facility according to the preference condition arbitrarily set by the user, the navigation device in the past Various types of tourist facilities such as a facility corresponding to a search history by the facility search performed in 1 are proposed. In the following description, it is assumed that registered points and drop-off points are also handled as a form of tourist facility.

  Here, the past stop points may be proposed only when the user permits the storage of the history of the stop points. In addition, as preference conditions, for example, a place with a good scenery, a family structure (presence of infants, presence of children, presence of disabled persons, etc.) can be set. Further, when a facility corresponding to a search history is proposed, in addition to the search history stored in the navigation device 1, the communication terminal 2 is used to connect to an external server via a wireless communication line, and then another person The search history may be obtained and used.

(E) When it is significantly earlier than the desired arrival time If the time difference between the current time and the desired arrival time is greater than or equal to the threshold T2, it is determined that it is significantly earlier than the desired arrival time, and a facility corresponding to it is proposed. To do. Here, out of various facilities existing within a predetermined distance from the current position of the host vehicle, a facility corresponding to a long-term sightseeing stop is searched based on the map data recorded in the HDD 13, and the search result is proposed. To do. For example, in addition to the above-mentioned various tourist facilities proposed when the arrival time is earlier than the desired arrival time, a tourist facility such as a tourist information center, the latest spot, and a place where a tourist information sign is installed is proposed.

  In addition, about a tourist information center, you may propose only when it is within the business hours memorize | stored beforehand. Further, information necessary for proposing the latest spot may be obtained from the communication terminal 2 connected to an external server via a wireless communication line. Alternatively, when the map data in the HDD 13 can be partially updated, the facility newly added by the last update may be proposed as the latest spot.

(F) When the stopover frequency is high When the desired arrival time at the destination is not set in the navigation device 1, the area to which the current position of the host vehicle belongs is determined based on the map data recorded in the HDD 13. . If the frequency of past visits in the area is higher than a predetermined value, among the facilities existing within a predetermined distance from the current position of the host vehicle, the proposed method is as described above when it is much earlier than the desired arrival time. The various tourist facilities excluding the tourist information center are searched based on the map data recorded in the HDD 13 and the search results are proposed. That is, when the frequency of visits in the area is high, the user already knows the tourist attractions in the area, and it is considered unnecessary to visit the tourist information center. Therefore, the facility to be proposed is searched from the tourist facilities excluding the tourist information center.

(G) When the stop-by frequency is low On the other hand, when the stop-by frequency in the area is lower than the predetermined value, the facility existing within a predetermined distance from the current position of the host vehicle is much earlier than the desired arrival time. Various kinds of tourist facilities as described above are searched based on the map data recorded in the HDD 13, and the search results are proposed. That is, a tourist information center is further added to a tourist facility proposed when the frequency of visits in the area is high, and a facility to be proposed is searched.

  As described above, in the proposal guidance process performed by the navigation device 1, it is determined whether or not the situation in which the vehicle is placed satisfies any of the various proposal generation conditions, and any of the proposal generation conditions is satisfied. Is determined, the proposal according to the proposal generation condition is performed. For example, when various facilities existing within a predetermined range from the current position of the own vehicle are proposed, the positions and names of the facilities are arranged in a predetermined order, for example, in the order of the distance from the current position of the own vehicle, and they are displayed on the monitor. A list is displayed at 16. On the other hand, when making a proposal to prompt the user to change the desired arrival time as described above, the user is instructed to set a new desired arrival time, for example, by voice output from the speaker 17. When a new recommended route is proposed by route re-search, the route is shown on the map displayed on the display monitor 16 in an identifiable form. Note that the proposed method described here is merely an example, and other proposed methods may be used.

  If the above proposal is performed by the navigation apparatus 1, the user can respond to the proposal. For example, when various facilities existing within a predetermined range from the current position of the host vehicle are proposed, the user performs a response by designating one of the facilities by operating the input device 18. Then, the navigation apparatus 1 selects the facility designated by the user, sets the facility as a destination (if the destination is not set) or a waypoint (if the destination is already set), and automatically sets the facility. A route from the current position of the vehicle to the set destination or a route from the current position of the host vehicle to the destination via the set waypoint is searched. The route searched in this way is set as a new recommended route, and guidance information according to the recommended route is provided by screen display of the display monitor 16 or voice output from the speaker 17 to provide route guidance to the destination. .

  On the other hand, when a proposal for prompting the user to change the desired arrival time is made, the user inputs a time to be set as a new desired arrival time by operating the input device 18 and responds. Alternatively, the user's utterance content may be determined by voice recognition and input as a desired arrival time. Then, the navigation apparatus 1 sets the input time as the desired arrival time after the change. At this time, the proposal according to the desired arrival time after the change may be continued.

  When a new recommended route obtained by route re-search is proposed, the user responds by operating the input device 18 whether or not to adopt the route. Then, the navigation apparatus 1 sets the said path | route as a new recommended path | route, when the response to the effect of adoption is performed. On the other hand, when a response indicating that it is not adopted is made, the original recommended route is set to be used as it is.

  FIG. 3 shows a flowchart executed in the navigation device 1 during the proposal guidance process described above. This flowchart is executed by the control unit 10 of the navigation device 1 while the host vehicle is traveling.

  In step S10, the control unit 10 determines whether to set a desired arrival time. When the user performs an input operation of the desired arrival time using the input device 18, the process proceeds to step S20. After setting the desired arrival time in step S20, the process proceeds to step S30. On the other hand, if the user has not performed an input operation of the desired arrival time, the process proceeds to step S30 without executing step S20.

  In step S <b> 30, the control unit 10 determines whether or not any of the various proposal generation conditions as described above with reference to FIG. 2 is satisfied. If any proposal occurrence condition is satisfied, the process proceeds to the following step S40.

  In step S40, the control unit 10 determines whether or not the current time is later than the desired arrival time when it is determined in step S30 that the above-described detour proposal generation condition is satisfied. If it is determined in step S30 that the proposed occurrence condition of the detour is satisfied, and the desired arrival time is set in step S20 and the current time is later than the desired arrival time, the process proceeds to step S120. On the other hand, if it is determined in step S30 that the proposed occurrence condition other than the detour is satisfied, or if the present condition is earlier than the desired arrival time although the deferred proposal occurrence condition is satisfied, or the desired arrival time is not set Advances to step S50.

  A case where the process proceeds from step S40 to step S50 will be described first. In step S50, the control unit 10 determines whether or not it is determined in step S30 when the above-described route departure proposal occurrence condition is satisfied. If it is determined in step S30 that the route departure suggestion occurrence condition is satisfied, that is, if the vehicle is considered to have deviated from the recommended route due to the carelessness of the user, the process proceeds to step S150. On the other hand, if it is determined in step S30 that the proposal occurrence condition other than the route deviation is satisfied, the process proceeds to step S60.

  In step S60, the control unit 10 sets a search target facility. Here, the search target facility corresponding to the proposal generation condition determined to be satisfied in step S30 is set as described above. That is, if it is determined in step S30 that the proposed occurrence condition for the continuous travel time is satisfied, a resting facility is set as a search target facility, and if it is determined in step S30 that the proposed occurrence condition for fuel shortage is satisfied, a fuel supply facility is searched. Set as a target facility. In addition, if it is determined in step S30 that the suggestion generation condition for the detour is satisfied, the restaurant is set as a search target facility in the meal time zone according to the situation at that time, and in the other time zone, the above-mentioned is set. As described above, various facilities according to the time difference between the current time and the desired arrival time and the frequency of visit are set as search target facilities.

  In step S <b> 70, the control unit 10 searches the search target facility set in step S <b> 60 within a predetermined distance from the current position of the host vehicle based on the map data recorded in the HDD 13.

  In step S80, the control unit 10 proposes the facility searched in step S70 to the user. Here, as described above, for example, the location and name of the found facility are displayed in a list on the display monitor 16 in the order from the current position of the host vehicle, and the facility is proposed to the user.

  In step S90, the control unit 10 determines whether any of the facilities proposed in step S80 has been designated by the user. When the user performs an operation of designating one of the facilities using the input device 18, the facility is selected in step S100 according to the operation, and the process proceeds to step S110. On the other hand, if no facility is designated by the user, the process returns to step S30.

  In step S110, the control unit 10 sets the facility selected in step S100 as a destination or waypoint, and searches for a route corresponding to the facility based on the map data recorded in the HDD 13. That is, if the destination is not set, the facility is set as the destination, and a route from the current position of the host vehicle to the destination is searched. On the other hand, if the destination has already been set, the facility is set as a waypoint, and a route from the current position of the vehicle to the set destination via the waypoint is searched. The route searched in this way is newly set as a recommended route. Then, guidance information for guiding the host vehicle to the destination or waypoint is provided by the screen display of the display monitor 16 or the sound output from the speaker 17. If step S110 is performed, it will return to step S30.

  Next, a case where the process proceeds from step S40 to step S120 will be described. In step S120, the control unit 10 proposes a change in the desired arrival time to the user. In the next step S130, the control unit 10 determines whether or not to change the desired arrival time based on a response from the user to the proposal in step S120. When the changed desired arrival time is input by the user's operation of the input device 18 or voice recognition, the process proceeds to step S140, and the desired arrival time is changed in step S140 based on the input content. If step S140 is performed, it will progress to step S150. On the other hand, if the changed desired arrival time is not input from the user in step S130, it is determined that the desired arrival time is not changed, and the process proceeds to step S150 without executing step S140.

  In step S150, the control unit 10 performs route re-search. Here, the route from the current position of the host vehicle to a preset destination is searched again. In subsequent step S160, the control unit 10 proposes the route searched in step S150 to the user as a new recommended route.

  In step S170, the control unit 10 determines whether or not to change the route based on the recommended route proposed in step S160. If the user makes a response to adopt the proposed route by operating the input device 18, it is determined that the route is to be changed, the process proceeds to step S180, and the recommended route is reset in step S180. Thereafter, the guidance information is provided according to the reset recommended route by the screen display of the display monitor 16 or the sound output from the speaker 17. If step S180 is performed, it will return to step S30. On the other hand, if the user responds that the proposed route is not adopted by operating the input device 18, it is determined in step S170 that the route is not changed, and the process returns to step S30 without executing step S180. .

  By repeatedly executing the processing of steps S30 to S180 as described above while the host vehicle is traveling, various contents are proposed according to the situation of the host vehicle. When the user responds to this proposal, various facilities are set as destinations and waypoints, and new recommended routes are set. Guide information to the destination or waypoint is provided according to the recommended route set in this way.

  According to the embodiment described above, the following operational effects are obtained.

(1) The navigation apparatus 1 determines whether or not the situation where the host vehicle is placed satisfies any one of a plurality of predetermined proposal generation conditions by the processing of the control unit 10 (step S30). When it is determined that the condition is satisfied, a proposal according to the proposal generation condition is performed (step S80). Based on this proposal, a destination or waypoint of the host vehicle is set, and a route corresponding to the destination or waypoint is searched (step S110). Then, according to the searched route, guidance information to the destination or waypoint is provided by screen display of the display monitor 16 or voice output from the speaker 17. Since it did in this way, useful guide information for a user can be provided according to a situation.

(2) The proposal generation conditions used in the determination in step S30 are the proposal generation conditions for the continuous travel time related to the travel time of the host vehicle, the proposal generation conditions for fuel shortage related to the remaining fuel amount of the host vehicle, It includes a recommended route that is set in advance and conditions for suggesting a detour for a positional relationship with a sightseeing spot or expressway. Therefore, it is possible to accurately determine various situations for which guidance information should be provided.

(3) The navigation device 1 sets a search target facility according to the proposal generation condition determined to be satisfied in step S30 by the process of the control unit 10 (step S60), and sets the facility at a predetermined distance from the current position of the host vehicle. (Step S70). By proposing the facility searched in this way in step S80, for example, when the travel time of the host vehicle satisfies the proposal occurrence condition of the continuous travel time, a rest facility existing within a predetermined range from the current position of the host vehicle is proposed. If the amount of fuel remaining in the vehicle satisfies the recommended generation condition for fuel shortage, a fuel supply facility that exists within a predetermined range from the current position of the vehicle is proposed, and the current position of the host vehicle is In the case of satisfying, the restaurant or the tourist facility that exists within the predetermined range from the current position of the host vehicle is proposed. Thereby, an appropriate proposal can be made according to the situation where the host vehicle is placed.

(4) Moreover, the navigation apparatus 1 selects either of the facilities proposed by step S80 by the process of the control part 10 (step S100). In step S110, the facility thus selected in step S100 is set as the destination or waypoint, and a route corresponding to the facility is searched. Since it did in this way, the guide information for stopping at a required facility among the proposed facilities can be provided reliably.

(5) Further, the navigation device 1 sets a desired arrival time at the destination by the processing of the control unit 10 (step S20). In step S80, based on the time difference between the current time and the set desired arrival time, for example, when the time difference is less than T1, a tourist facility such as a resting facility and a specialty store is proposed, and the time difference is T1 or more and less than T2. In this case, a tourist facility such as a specialty store, a registration point, a drop-in point, a facility according to preference conditions, or a facility according to the search history is proposed. If the time difference is T2 or more, in addition to the above-mentioned various tourist facilities Furthermore, tourist facilities such as a tourist information center, the latest spot, and a place where tourist information signs are installed are proposed. In this way, by proposing a facility of a type corresponding to the time difference between the current time and the desired arrival time, the content of the proposal was changed based on the time difference, so the situation where the vehicle was placed It is possible to make an accurate proposal by classifying more finely.

(6) In step S80, as the time difference between the current time and the set desired arrival time is larger as described above, more types of facilities are proposed. Thereby, since the kind of facility to propose can be increased and the range of selection of a user can be expanded, so that a stoppage time is long, a more substantial sightseeing can be experienced by a user.

  In addition, you may use the navigation apparatus which applied the proposal guidance process by this invention which was demonstrated above as a navigation apparatus mounted in the rental car for sightseeing spots. In this case, rental car dealers can register tourist spots recommended in advance as registration points or set preference conditions suitable for the customer's characteristics and purpose so that the tourists who are customers can efficiently Be able to do sightseeing. For example, for older tourists, it is suggested not to pass if you get close to a famous tourist spot, or for tourists who want to shop, it is not very famous but has a well-established store in the area. It is possible to provide tourist information useful for customers by proposing

  In the above-described embodiment, an example has been described in which a proposal is made according to a proposal generation condition when any one of a plurality of preset generation conditions is satisfied. However, it is also possible to make a proposal according to the present invention when a plurality of proposal generation conditions are satisfied at the same time. In that case, proposals corresponding to each proposal generation condition determined to be satisfied may be performed simultaneously or in a predetermined order, or only proposals corresponding to any one or a plurality of proposal generation conditions may be performed. . For example, when it is determined that the amount of remaining fuel in the host vehicle is equal to or less than a predetermined threshold and the proposed generation condition for the detour is satisfied, a fuel supply facility and a tourist facility can be proposed at the same time. Note that when only a proposal corresponding to any one or a plurality of proposal generation conditions is to be performed, the user may be allowed to select which proposal is to be performed, or may be automatically selected according to the situation.

  In the embodiment described above, when setting a desired arrival time at a destination, a recommended route to the destination may or may not be set. If the destination and the desired arrival time are set without setting the recommended route, even if the time when it is determined that the proposed occurrence condition of the detour is satisfied is later than the desired arrival time, as described above It is preferable to make only a proposal to prompt the change of the desired arrival time without performing route re-search.

  In the embodiment described above, the route guidance based on the recommended route may be temporarily interrupted when making a proposal according to the proposal generation condition. Furthermore, the recommended route shown on the map displayed on the display monitor 16 may be temporarily deleted so that the user can easily determine the content of the proposal.

  Furthermore, when the proposed facility or the like is set as a transit point, the desired departure time for the transit point may be set according to an operation from the user. In this case, based on the set desired departure time, it is preferable to present the stayable time at the waypoint or to prompt the user to leave when the desired departure time approaches. Further, if the stayable time is less than a predetermined value, the user may be warned before starting the route guidance to the waypoint.

  The embodiment and various modifications described above are merely examples, and the present invention is not limited to these contents as long as the features of the invention are not impaired. Moreover, you may use the said embodiment and a modification in combination.

1: navigation device, 2: communication terminal, 10: control unit, 11: vibration gyro,
12: Vehicle speed sensor, 13: HDD, 14: GPS receiver, 15: VICS information receiver,
16: Display monitor, 17: Speaker, 18: Input device

Claims (5)

A navigation device mounted on a vehicle,
Map data,
Determining means for determining whether or not the situation where the vehicle is placed satisfies any of a plurality of predetermined proposal generation conditions;
Proposing means for making a proposal according to the proposal occurrence condition when the judgment means determines that the situation of the vehicle satisfies any of the plurality of proposal occurrence conditions;
Route search means for setting a destination or waypoint of the vehicle based on the proposal and searching for a route according to the destination or waypoint;
Providing means for providing guidance information to the destination or the waypoint according to the route searched by the route search means;
And a desired arrival time setting means for setting the desired arrival time to the destination,
The suggestion means is:
If the current time is later than the desired arrival time, a suggestion is made to prompt the user to change the desired arrival time,
If the current time is earlier than the desired arrival time, a facility corresponding to a stop-by time corresponding to the time difference between the current time and the desired arrival time is searched based on the map data, and a search result is proposed. A navigation device characterized by the above. The navigation device according to claim 1, wherein
If the current time is earlier than the desired arrival time , the proposing means may respond to the time difference between the current time and the desired arrival time.
If the time difference is less than or equal to the first threshold value, the facility corresponding to a short-term sightseeing purpose stop is preferentially proposed,
If the time difference is an intermediate value between the first threshold value and the second threshold value, a facility corresponding to a stopover for a medium-time tourist purpose is preferentially proposed,
When the time difference is a value equal to or greater than a second threshold value, a navigation device is provided that preferentially proposes a facility corresponding to a long-term sightseeing stop. The navigation device according to claim 1 or 2,
The proposal generation condition includes a first condition relating to a traveling time of the vehicle, a second condition relating to a remaining fuel amount of the vehicle, a current position of the vehicle, a preset recommended route, a sightseeing spot, or a highway. A navigation device comprising at least one of a third condition relating to the positional relationship of The navigation device according to claim 3,
The suggestion means is:
If the running time of the vehicle satisfies the first condition, a resting facility that exists within a predetermined range from the current position of the vehicle is proposed,
When the remaining fuel amount of the vehicle satisfies the second condition, a fuel supply facility that exists within a predetermined range from the current position of the vehicle is proposed,
When the current position of the vehicle satisfies the third condition, the navigation apparatus proposes one or both of a dining facility and a tourist facility existing within a predetermined range from the current position of the vehicle. The navigation device according to claim 4, wherein
A selection means for selecting any of the plurality of facilities proposed by the proposal means;
The navigation device characterized in that the route search means sets the facility selected by the selection means as the destination or the waypoint, and searches for a route according to the facility.

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