JPWO2007083734A1 - Navigation device and route display device - Google Patents

Abstract

The navigation device (100) includes a search unit (102) that searches for a route and a guide unit (101) that guides the searched route. When an event that makes it difficult for the moving body to move along the route being guided occurs, the control unit (103) causes the search unit (102) to search for another route different from the route being guided. The notification unit (104) notifies the searched alternative route. When the route is notified, the input unit (105) receives from the user an instruction input as to whether or not to switch the route to be guided from the route being guided to another route. When the input unit (105) receives an instruction input indicating that the route to be guided is not switched from the route being guided to another route, the control unit (103) searches for another route by the subsequent search unit (102). To control.

Description

  The present invention relates to a navigation device, a route display device, a search control method, a display control method, a search control program, a display control program, and a recording medium that search and display a route along which a moving body moves.

  2. Description of the Related Art Conventionally, a navigation device that provides route guidance to a destination point has known a technique (auto-reroute) that searches for a detour that is different from the route that is currently displayed / guided when a traffic jam occurs. The navigation device having the auto reroute function displays the searched detour and causes the user to select the detour desired by the displayed detour. Then, the navigation device performs route guidance for the selected detour. Thereby, it is supposed that guidance by an appropriate detour is performed when a traffic jam occurs (for example, see Patent Document 1 below).

JP 2001-227965 A

  However, according to the above-described prior art, even if the user wants to travel the route that is currently being traveled by canceling the detour that is searched and displayed when traffic congestion occurs, the navigation device again avoids traffic congestion. As an example, there is a problem of searching for a detour that takes into account and displaying the searched detour.

  In such a case, the route guidance based on the user's intention cannot be performed, and the auto-reroute function, which is a function for improving the convenience of the navigation device, is complicated for the user. The problem is given as an example. In addition, when the driver is traveling alone, there is a problem that attention is paid to the displayed detour, which hinders safe driving.

  In order to solve the above-described problems and achieve the object, the navigation device according to the invention of claim 1 is a navigation device including search means for searching for a route and guidance means for guiding the searched route, When an event occurs that makes it difficult for the moving body to move along the route in the middle, a control unit that causes the searching unit to search for a different route different from the route being guided and the searched other route are notified. And an input means for receiving an instruction input from a user as to whether or not to switch the route to be guided from the route being guided to the another route when the other route is notified, and the control means When an instruction input indicating that the route to be guided is not switched from the route being guided to the other route is accepted, the search unit controls the search for the other route thereafter. The features.

  Further, the route display device according to the invention of claim 4 is a route display device comprising a display means for displaying a route, and when an event occurs that makes it difficult to move the moving body along the route being displayed. Search means for searching for another route different from the currently displayed route, control means for displaying the searched different route on the display means, and when the different route is displayed, the route to be displayed is Input means for accepting from a user an instruction input as to whether or not to switch from the currently displayed path to the different path, and the control means does not switch the display target path from the currently displayed path to the different path. When the instruction input to that effect is accepted, the display means is controlled so that the separate route is not displayed thereafter.

  The search control method according to the invention of claim 5 is a search control method in a navigation device, wherein an acquisition step of acquiring information on an event that makes it difficult to move a moving body, and information on the event is acquired. A determination step of determining whether or not there is an event that makes it difficult to move the moving body on the route being guided, and an event that makes it difficult to move the moving body on the route that is being guided When it is determined that there is a search, the navigation device searches for a different route different from the route being guided, a notification step of notifying the searched different route, and when the different route is notified In addition, an input step of receiving from the user an instruction input as to whether or not to switch the route to be guided from the route being guided to the another route; and not switching the route to be guided from the route being guided to the another route. When the instruction input effect is accepted, characterized in that it contains a control step of controlling the search of the different pathways by subsequent the navigation device.

  According to a sixth aspect of the present invention, there is provided a display control method for a route display device for displaying a route, the acquisition step for acquiring information on an event that makes it difficult to move a moving object, and the event A determination step of determining whether or not there is an event that makes it difficult to move the moving object on the displayed route, and movement of the moving object on the displayed route. A search step for searching for a different route different from the currently displayed route, a display step for causing the route display device to display the searched different route, and When a route is displayed, an input step of receiving an instruction input from a user as to whether or not to switch the display target route from the displayed route to the different route, and the display target route from the displayed route Switch to the other route If the There are instruction input effect is accepted, characterized in that it includes a control step for controlling the specific path the route display device not to display subsequent to, the.

  According to a seventh aspect of the present invention, a search control program causes a computer to execute the search control method according to the fifth aspect.

  A display control program according to an invention of claim 8 causes a computer to execute the display control method according to claim 6.

  According to a ninth aspect of the present invention, there is provided a recording medium that can be executed by a computer that records the search control program according to the seventh aspect or the display control program according to the eighth aspect.

FIG. 1 is a block diagram illustrating a functional configuration of the navigation device according to the embodiment. FIG. 2 is a flowchart showing a procedure of route search processing by the navigation device. FIG. 3 is a block diagram of a functional configuration of the route display device according to the embodiment. FIG. 4 is a block diagram of a hardware configuration of the navigation device according to the embodiment. FIG. 5 is a flowchart showing a procedure of the same bypass avoidance reroute process by the navigation device. FIG. 6 is a flowchart showing a procedure of the same bypass avoidance reroute process by the navigation device. FIG. 7 is a flowchart showing a procedure of the avoidance reroute processing within a predetermined time by the navigation device. FIG. 8 is a flowchart showing a procedure of the avoidance reroute processing within a predetermined time by the navigation device. FIG. 9 is an explanatory diagram illustrating an example of a screen display when the display of the detour is canceled.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Navigation apparatus 101 Guidance part 102 Search part 103 Control part 104 Notification part 105 Input part 300 Path | route display apparatus 301 Display part 302 Search part 303 Control part 304 Input part

  Exemplary embodiments of a navigation device, a route display device, a search control method, a display control method, a search control program, a display control program, and a recording medium according to the present invention are explained in detail below with reference to the accompanying drawings.

(Embodiment)
First, the functional configuration of the navigation device 100 according to the embodiment will be described. FIG. 1 is a block diagram illustrating a functional configuration of the navigation device according to the embodiment. The navigation device 100 includes a guidance unit 101, a search unit 102, a control unit 103, a notification unit 104, and an input unit 105.

  The guiding unit 101 guides the moving body along the route by displaying a map information screen or outputting guidance voice. The route guidance by the guide unit 101 is performed, for example, along the route searched by the search unit 102 described later.

  The search unit 102 searches for a route along which the moving body moves based on the control of the control unit 103. The search unit 102 searches for a route to a destination point designated by the user of the navigation device 100, for example.

  The control unit 103 causes the search unit 102 to search for another route that is different from the route being guided when an event that makes it difficult for the guide unit 101 to move the moving object along the route being guided occurs. An event that makes it difficult for a moving object to move along the route being guided is, for example, when there is a traffic jam on the route being guided or when the current location of the moving object is significantly different from the route being guided. It is.

  In addition, another route is a part of the route, for example, to avoid a route from the current location of the moving object to the destination, or an event that makes it difficult for the moving object to move along the route being guided. It is a detour part.

  The notification unit 104 notifies the searched alternative route. The alerting | reporting part 104 alert | reports another route by, for example, displaying the searched another route on a display screen so that it may overlap with map information. Further, for example, another route may be notified by outputting a rough guidance on the other route.

  When the different route is notified, the input unit 105 receives from the user an instruction input as to whether or not to switch the route to be guided by the guide unit 101 from the route being guided to another route. For example, the input unit 105 displays a selection screen as to whether or not to select another route on the display screen, and accepts a selection input by the user. For example, it is good also as receiving the instruction | indication input performed with an audio | voice.

  When the input unit 105 receives an instruction input indicating that the route to be guided by the guide unit 101 is not switched from the route being guided to another route, the control unit 103 searches for another route by the subsequent search unit 102. To control. Specifically, for example, when the control unit 103 receives an instruction input indicating that the route to be guided is not switched from the route being guided to another route, the control unit 103 causes the search unit 102 not to search for the other route. Control.

  Further, for example, when the control unit 103 receives an instruction input indicating that the route to be guided is not switched from the route being guided to another route, the control unit 103 separates the route from when the instruction input is received until a predetermined time elapses. The search unit 102 may be controlled so as not to search for a route.

  Next, route search processing by the navigation device 100 will be described. FIG. 2 is a flowchart showing a procedure of route search processing by the navigation device. In the flowchart of FIG. 2, the navigation device 100 first determines whether or not an event has occurred that makes it difficult for the moving body to move along the route being guided (step S201).

  Until an event that makes it difficult to move the moving body along the route being guided occurs (step S201: No), guidance is performed along the route being guided (step S202), and the process returns to step S201, and the subsequent processing repeat. On the other hand, when an event that makes it difficult for the moving body to move along the route being guided occurs (step S201: Yes), the control unit 103 causes the search unit 102 to search for another route different from the route being guided. (Step S203).

  Then, the notification unit 104 notifies the other route searched in step S203 (step S204), and receives an instruction input as to whether or not to switch the guidance target route from the route being guided to another route (step S205). When switching to another route (step S206: Yes), that is, when receiving an instruction input for switching the route to be guided from the route being guided to another route, the processing according to this flowchart is terminated.

  On the other hand, when the route is not switched to another route (step S206: No), that is, when an instruction input indicating that the route to be guided is not switched from the route being guided to another route is received, the control unit 103 causes the search unit 102 to The subsequent search for another route is controlled (step S207), and the processing according to this flowchart ends.

  In the navigation device 100 described above, the control unit 103 controls the search for another route by the search unit 102. For example, in a route display device that displays a route, the display of another route is controlled. Also good. FIG. 3 is a block diagram of a functional configuration of the route display device according to the embodiment. The route display device 300 includes a display unit 301, a search unit 302, a control unit 303, and an input unit 304.

  The display unit 301 displays a route along which the moving body moves. The search unit 302 searches for a different route that is different from the currently displayed route when an event that makes it difficult for the moving object to move along the currently displayed route occurs. The control unit 303 causes the display unit 301 to display the searched alternative route. When another route is displayed, the input unit 304 receives an instruction input from the user regarding whether or not to switch the route to be displayed from the currently displayed route to another route.

  Then, the control unit 303 controls the display unit 301 not to display the separate route thereafter when an instruction input indicating that the display target route is not switched from the currently displayed route to another route is received.

  As described above, according to the navigation device 100 according to the embodiment, when an event that makes it difficult to move the mobile body along the displayed route occurs, such as when a traffic jam occurs, the current location of the mobile body Search for another route from to the destination. If the searched alternative route is not selected by the user, the alternative route is not searched (displayed) again. Alternatively, when the user cancels the detour, the detour search (display) is not performed within a predetermined time.

  Thereby, it is possible to prevent a route unnecessary for the user from being searched (displayed). Moreover, it is possible to prevent the user's attention from being distracted by presenting unnecessary route information. In particular, when the user is driving, presenting more information than necessary may distract the user's attention and cause a traffic accident due to carelessness ahead. The navigation device 100 does not search (display) again the detour route canceled by the user, and does not present unnecessary information.

(Hardware configuration of navigation device 400)
Next, examples of the navigation device 100 according to the above-described embodiment will be described. FIG. 4 is a block diagram of a hardware configuration of the navigation device according to the embodiment.

  In FIG. 4, a navigation device 400 includes a CPU 401, a ROM 402, a RAM (memory) 403, a magnetic disk drive 404, a magnetic disk 405, an optical disk drive 406, an optical disk 407, and an audio I / F (interface) 408. A microphone 409, a speaker 410, an input device 411, a video I / F 412, a camera 413, a display 414, a communication I / F 415, a GPS unit 416, and various sensors 417. Each component 401 to 417 is connected by a bus 420.

  The CPU 401 governs overall control of the navigation device 400. The ROM 402 records programs such as a boot program, a communication program, a database creation program, and a data analysis program. The RAM 403 is used as a work area for the CPU 401.

  The magnetic disk drive 404 controls the reading / writing of the data with respect to the magnetic disk 405 according to control of CPU401. The magnetic disk 405 records data written under the control of the magnetic disk drive 404. As the magnetic disk 405, for example, an HD (hard disk) or an FD (flexible disk) can be used.

  The optical disk drive 406 controls the reading / writing of the data with respect to the optical disk 407 according to control of CPU401. The optical disc 407 is a detachable recording medium from which data is read according to the control of the optical disc drive 406. As the optical disc 407, a writable recording medium can be used. In addition to the optical disk 407, the removable recording medium may be an MO, a memory card, or the like.

  Another example of information recorded on the magnetic disk 405 and the optical disk 407 is map data used for route search and route guidance. The map data includes background data representing features (features) such as buildings, rivers, and the ground surface, and road shape data representing the shape of the road. The map data is displayed in two or three dimensions on the display screen of the display 414. Drawn. When the navigation device 400 is guiding a route, the map data and the current location of the vehicle acquired by the CPU 301 are displayed in an overlapping manner.

  Here, the background data further includes background shape data representing the shape of the background and background type data representing the type of the background. The background shape data includes, for example, feature representative points, polylines, polygons, feature coordinates, and the like. The background type data includes, for example, text data representing the name, address, and telephone number of a feature, and type data of a feature such as a building, river, or ground surface.

  Furthermore, regarding major facilities (POI: Point of Interest) in the map, information such as business hours and the presence or absence of a parking lot is included as facility information. Furthermore, among the features, facilities provided for a predetermined purpose, such as “gas station” and “convenience store”, are classified according to their types. Then, the representative point and coordinate data of the feature and the facility information / genre information are associated with each other. The genre into which the facility is classified at this time includes, for example, a parking lot and a station in addition to the above-mentioned gas station and convenience store.

  The road shape data further includes traffic condition data. The traffic condition data includes, for example, whether or not there is a signal or a pedestrian crossing, whether or not there is a highway doorway or junction, the length (distance) of each link, road width, direction of travel, road type (highway, Such as toll roads and general roads).

  The traffic condition data stores past traffic information obtained by statistically processing past traffic information based on seasons, days of the week, large holidays, and time. The navigation device 400 obtains information on a traffic jam that is currently occurring from road traffic information received by a communication I / F 415, which will be described later, and can predict a traffic jam situation at a specified time based on past traffic jam information. Become.

  The audio I / F 408 is connected to a microphone 409 for audio input and a speaker 410 for audio output. The sound received by the microphone 409 is A / D converted in the sound I / F 408. In addition, sound is output from the speaker 410. Note that the voice input from the microphone 409 can be recorded on the magnetic disk 405 or the optical disk 407 as voice data.

  Examples of the input device 411 include a remote controller including a plurality of keys for inputting characters, numerical values, various instructions, a keyboard, a mouse, a touch panel, and the like. Further, the input device 411 can be connected to another information processing terminal such as a digital camera or a mobile phone terminal to input / output data.

  The video I / F 412 is connected to a camera 413 for video input and a display 414 for video output. Specifically, the video I / F 412 includes, for example, a graphic controller that controls the entire display 414, a buffer memory such as a VRAM (Video RAM) that temporarily records image information that can be displayed immediately, and a graphic controller. Based on the output image data, the display 414 is configured by a control IC that controls display.

  The camera 413 captures images inside and outside the vehicle and outputs them as image data. An image captured by the camera 413 can be recorded on the magnetic disk 405 or the optical disk 407 as image data. The display 414 displays icons, cursors, menus, windows, or various data such as characters and images. As the display 414, for example, a CRT, a TFT liquid crystal display, a plasma display, or the like can be adopted.

  The communication I / F 415 is connected to a network via wireless and functions as an interface between the navigation device 400 and the CPU 401. The communication I / F 415 is further connected to a communication network such as the Internet via wireless, and also functions as an interface between the communication network and the CPU 401.

  Communication networks include LANs, WANs, public line networks and mobile phone networks. Specifically, the communication I / F 415 includes, for example, an FM tuner, a VICS (Vehicle Information and Communication System) / beacon receiver, a radio navigation device, and other navigation devices. Get road traffic information such as regulations. VICS is a registered trademark.

  The GPS unit 416 receives radio waves from GPS satellites and calculates information indicating the current position of the vehicle (current position of the navigation device 400). The output information of the GPS unit 416 is used when the current position of the vehicle is calculated by the CPU 401 together with output values of various sensors 417 described later. The information indicating the current location is information for specifying one point on the map data, such as latitude / longitude and altitude.

  The various sensors 417 output information that can determine the position and behavior of the vehicle, such as a vehicle speed sensor, an acceleration sensor, and an angular velocity sensor. The output values of the various sensors 417 are used by the CPU 401 to calculate the current location of the vehicle and to measure the amount of change in speed and direction. In addition, the navigation apparatus 400 is good also as data which record the output value of various sensors 417 with a drive recorder function.

  Here, in the configuration of the navigation device 100 according to the embodiment, the guidance unit 101 and the notification unit 104 include the search unit 102 and the control unit 103 by the CPU 401, the audio I / F 408, the speaker 410, the video I / F 412, and the display 414. These functions are realized by the CPU 401 and the input unit 105 by the input device 411.

(Reroute processing of navigation device 400)
Next, the reroute process of the navigation device 400 will be described. The navigation device 400 searches for a route to a destination point set by the user, and performs navigation (route guidance) processing along the searched route. On the other hand, if the situation changes during the navigation process due to factors that cannot be anticipated during the initial route search, the route to the destination point is searched again (reroute) so that the user can select the optimum route. ing.

  The main reason for reroute is the change in traffic conditions. In the route search, an actual road condition acquired by VICS (registered trademark) information, a past traffic statistics value included in map data, and the like are taken into consideration. For this reason, for example, when traffic conditions change after the initial route search, such as when traffic congestion occurs on the route, reroute is performed in order to obtain an optimal route while reflecting the change in traffic conditions.

  In addition to this, when a vehicle equipped with the navigation device 400 deviates from the route being guided, the vehicle is returned to the route being guided, or the route from the current point of the vehicle to the destination point is re-searched. In order to do this, a reroute is performed.

  However, even when a reroute is performed, the user does not always select a route searched by the reroute (hereinafter referred to as a detour). For example, even if the arrival time at the destination point is somewhat delayed due to traffic jams, if the user wants to travel on a route that he / she is used to running, he / she would like to travel on the route he / she is currently traveling on without selecting a detour. It is done.

  In this way, even when the user is traveling on the route selected by himself / herself, if the cause of the reroute (for example, traffic jams occurring on the route) has not been resolved, again for the same reason A reroute is performed and a detour is notified. Such processing becomes complicated for the user, and the navigation device 400 also performs useless processing.

  Therefore, when the user cancels the reroute, the navigation device 400 prevents the same detour from being searched again or does not perform the reroute until a predetermined time elapses. Thereby, the reroute process can be performed without making the user feel complicated, and the process of the navigation device 400 can be reduced. Hereinafter, processing when searching while avoiding the same detour (same detour rerouting), and processing when searching for a route within a predetermined time after canceling the detour (preventing rerouting during predetermined time) ).

  FIG. 5 and FIG. 6 are flowcharts showing the same bypass avoidance reroute processing procedure by the navigation device. In the following description, it is assumed that the trigger for searching for a detour (reroute) is a traffic jam on the currently traveling route.

  In the flowchart of FIG. 5, the navigation device 400 first performs route guidance along a route that is currently running (hereinafter, referred to as a current route) (step S501). Then, it is determined whether or not the current point of the vehicle (navigation device 400) has reached the destination point set by the user (step S502).

  If the destination point has been reached (step S502: Yes), the processing according to this flowchart is terminated. The determination as to whether or not the destination point has been reached is made based on, for example, whether or not the current point of the vehicle calculated by the CPU 401 matches the destination point set by the user.

  On the other hand, while not reaching the destination point (step S502: No), road traffic information is acquired by the communication I / F 415 or the like (step S503), and it is determined whether there is traffic on the current route (step S504). . The determination as to whether or not there is a traffic jam may be made using actual road traffic information acquired by the communication I / F 415 or the like, for example, included in the map information recorded on the magnetic disk 405 or the optical disk 407. The traffic jam may be predicted from the past traffic jam information.

  If there is no traffic jam on the current route (step S504: No), the process returns to step S502 and the subsequent processing is continued. On the other hand, if there is a traffic jam on the current route (step S504: Yes), a bypass is searched for avoiding the traffic jam and reaching the destination point more efficiently (step S505). At this time, there may be one or more detours to be searched for. The navigation apparatus 400 displays the searched detour on the display 414 (step S506), and determines whether or not the user selects the detour (step S507).

  The determination as to whether or not the user selects a detour is made, for example, by determining whether or not the user has given an instruction to switch the guide route to the detour via the input device 411. If a plurality of detours are searched in step S505, it is determined whether any one of the detours has been selected. When selecting a detour (step S507: Yes), route guidance is performed along the detour (step S508), the process returns to step S502, and the subsequent processing is continued.

  On the other hand, when the detour is not selected (step S507: No), the detour not selected is recorded (step S509). This is to prevent searching for the same detour as described later. The unselected bypass recorded at this time is hereinafter referred to as a storage bypass. Then, the route guidance is continued along the current route (step S510), and the process proceeds to step S511 in FIG.

  Turning to the description of FIG. 6, the navigation apparatus 400 determines whether or not the current point of the vehicle has reached the destination point (step S511). When the destination point has been reached (step S511: Yes), the processing according to this flowchart is terminated.

  On the other hand, when the destination point is not reached (step S511: No), road traffic information is acquired again by the communication I / F 415 or the like (step S512), and it is determined whether or not there is a traffic jam on the current route (step S513). ). If there is no traffic jam on the current route (step S503: No), the process returns to step S511 and the subsequent processing is continued.

  On the other hand, when there is a traffic jam on the current route (step S513: Yes), the traffic route is avoided and a detour for reaching the destination point more efficiently is searched (step S514). Then, the navigation device 400 determines whether or not the detour searched this time includes the same detour as the storage detour stored in step S509 (step S515).

  When the same route as the storage detour is included (step S515: Yes), the storage detour is removed from the detour searched in step S514 (step S516). Then, it is determined whether there is a detour that can be displayed (step S517). If there is a detour that can be displayed (step S517: Yes), the detour is displayed on the display 413 (step S518). On the other hand, when there is no detour that can be displayed (step S517: No), the process proceeds to step S521.

  If the same route as the storage detour is not included in step S515 (step S515: No), the detour searched in step S514 is displayed on the display 414 as it is (step S518).

  Then, it is determined whether or not the user selects a detour (step S519). When a detour is selected (step S519: Yes), route guidance is performed along the detour (step S520). Until it reaches (step S521: No), the process returns to step S512 and the subsequent processing is continued.

  On the other hand, when the detour is not selected (step S519: No), the detour that has not been selected is stored (step S522), the process returns to step S510 in FIG. 5, and the subsequent processing is continued.

  Next, the avoidance reroute process within a predetermined time will be described. FIG. 7 and FIG. 8 are flowcharts showing a procedure of the avoidance reroute processing within a predetermined time by the navigation device. In the flowchart of FIG. 7, the navigation device 400 first performs route guidance along the current route (step S701). Then, it is determined whether or not the current point of the vehicle (navigation device 400) has reached the destination point set by the user (step S702).

  If the destination point has been reached (step S702: Yes), the processing according to this flowchart is terminated. The determination as to whether or not the destination point has been reached is made based on, for example, whether or not the current point of the vehicle calculated by the CPU 401 matches the destination point set by the user.

  On the other hand, while not reaching the destination point (step S702: No), road traffic information is acquired by the communication I / F 415 or the like (step S703), and it is determined whether there is traffic on the current route (step S704). . The determination as to whether or not there is a traffic jam may be made using actual road traffic information acquired by the communication I / F 415 or the like, for example, included in the map information recorded on the magnetic disk 405 or the optical disk 407. The traffic jam may be predicted from the past traffic jam information.

  If there is no traffic jam on the current route (step S704: No), the process returns to step S702 and the subsequent processing is continued. On the other hand, when there is a traffic jam on the current route (step S704: Yes), a detour for avoiding the traffic jam and reaching the destination more efficiently is searched (step S705). At this time, a plurality of detours may be searched. The navigation apparatus 400 displays the searched detour on the display 414 (step S706), and determines whether or not the user selects the detour (step S707).

  The determination as to whether or not the user selects a detour is made, for example, by determining whether or not the user has given an instruction to switch the guide route to the detour via the input device 411. In step S705, if a plurality of detours are searched, it is determined whether any one of the detours has been selected.

  When selecting a detour (step S707: Yes), route guidance is performed along the detour (step S708), the process returns to step S702, and the subsequent processing is continued. On the other hand, when the detour is not selected (step S707: No), the process proceeds to step S709 in FIG.

  Moving to the description of FIG. 8, when the detour is not selected in step S707 of FIG. 7, the navigation device 400 continues route guidance along the current route (step S709). Then, the road traffic information is acquired again by the communication I / F 415 or the like (step S710), and it is determined whether there is a traffic jam on the current route (step S711).

  If there is a traffic jam on the current route (step S711: Yes), it is determined whether or not a predetermined time has elapsed since the previous reroute cancellation (step S712). The reroute cancellation is a case where it is determined in step S707 in FIG. 7 or step S715 described later that no detour is selected. In addition, the predetermined time may be a specific time, for example, several minutes or several hours after the reroute cancellation, until the day when the reroute is canceled, or a heavy traffic jam time until the destination point at the time of traveling is reached. It may be an uncertain time such as until the belt passes.

  When the predetermined time has elapsed since the previous reroute cancellation (step S712: Yes), a detour for avoiding traffic jam and reaching the destination more efficiently is searched (step S713). Then, the detour is displayed on the display 414 (step S714), and it is determined whether or not the user selects the detour (step S715).

  When a detour is selected (step S715: Yes), route guidance is performed along the detour (step S716), and the process returns to step S710 until the destination point is reached (step S717: No), and the subsequent processing Continue. And if it arrives at the destination point (step S717: Yes), the process by this flowchart will be complete | finished.

  If there is no traffic jam on the current route in step S711 (step S711: No), a predetermined time has not elapsed since the previous reroute cancellation in step S712 (step S712: No), and a detour in step S715 Is not selected (step S715: No), the process proceeds to step S717.

  Through the processing as described above, the navigation device 400 guides to the destination point while repeatedly searching for a detour (reroute). The trigger for searching for a detour is not limited to the occurrence of a traffic jam, and may be, for example, when the vehicle travels off the current route or when the vehicle cannot travel on the road due to traffic restrictions.

  FIG. 9 is an explanatory diagram illustrating an example of a screen display when the display of the detour is canceled. The case where the display of the detour is cancelled is, for example, the case where the detour is not displayed by the rerouting process within a predetermined time, or the storage detour is removed by the same detour avoiding reroute process. Is the case.

  The display 414 of the navigation device 400 displays a position display S indicating the current location of the vehicle on which the navigation device 400 is mounted, and a map around the route currently being traveled. In addition, an arrow P indicating the guidance route of the currently traveling route is displayed in front of the traveling direction of the vehicle. That is, in the example of FIG. 9, the vehicle is guided to turn right at the intersection C.

  On the other hand, in the lower left of the display 414, a cancel display 901 indicating that the display of the detour is canceled is displayed. By displaying the cancel display 901, the user can know that the navigation device 400 currently restricts the display of the detour.

  Further, when it is desired to display a detour route whose display has been canceled, the cancel of the display can be canceled by pressing a cancel cancel button 902. In addition to the display of the cancel display 901, guidance voices, sound effects, etc. may be output from the speaker 410 (not shown). Further, a visual effect such as blinking the cancel display 901 may be generated.

  As described above, according to the navigation device 400, when an event occurs that makes it difficult for the vehicle to move along the displayed route, such as when there is a traffic jam, another route from the current point of the vehicle to the destination point. Explore. If the searched alternative route is not selected by the user, the alternative route is not searched (displayed) again. Alternatively, when the user cancels the detour, the detour search (display) is not performed within a predetermined time.

  Thereby, unnecessary information is not displayed on the display 414, and the user's attention can be prevented from being distracted. In particular, when the user is driving, displaying more information than necessary on the display 414 may direct the user's attention to the display 414, which may cause a traffic accident due to carelessness ahead. The navigation device 400 does not search (display) again the detour route canceled by the user, and does not display more information than necessary on the display 414.

  Further, by displaying a cancel indication 901 on the display 414 that the search (display) of the detour has been canceled, the user can visually check the detour search (display) status. Furthermore, by displaying the cancel cancel button 902 together with the cancel display 901, the search (display) cancel can be canceled based on the user's will.

  The search control method and the display control method described in this embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. Further, this program may be a transmission medium that can be distributed via a network such as the Internet.

  The present invention relates to a navigation device, a route display device, a search control method, a display control method, a search control program, a display control program, and a recording medium that search and display a route along which a moving body moves.

  2. Description of the Related Art Conventionally, a navigation device that provides route guidance to a destination point has known a technique (auto-reroute) that searches for a detour that is different from the route that is currently displayed / guided when a traffic jam occurs. The navigation device having the auto reroute function displays the searched detour and causes the user to select the detour desired by the displayed detour. Then, the navigation device performs route guidance for the selected detour. Thereby, it is supposed that guidance by an appropriate detour is performed when a traffic jam occurs (for example, see Patent Document 1 below).

JP 2001-227965 A

  However, according to the above-described prior art, even if the user wants to travel the route that is currently being traveled by canceling the detour that is searched and displayed when traffic congestion occurs, the navigation device again avoids traffic congestion. As an example, there is a problem of searching for a detour that takes into account and displaying the searched detour.

  In such a case, the route guidance based on the user's intention cannot be performed, and the auto-reroute function, which is a function for improving the convenience of the navigation device, is complicated for the user. The problem is given as an example. In addition, when the driver is traveling alone, there is a problem that attention is paid to the displayed detour, which hinders safe driving.

  In order to solve the above-described problems and achieve the object, the navigation device according to the invention of claim 1 is a navigation device including search means for searching for a route and guidance means for guiding the searched route, When an event occurs that makes it difficult for the moving body to move along the route, a control unit that causes the search unit to search for another route different from the route being guided and the searched other route are notified. And an input means for receiving an instruction input from a user as to whether or not to switch the route to be guided from the route being guided to the another route when the other route is notified, and the control means Is configured to control the search means not to search for another route when an instruction input indicating that the route to be guided is not switched from the route being guided to the another route is received. It is characterized in.

  A navigation device according to a second aspect of the present invention is a navigation device comprising search means for searching for a route and guide means for guiding the searched route, and movement of a moving body along the route is performed during the guide. When an event that becomes difficult occurs, a control unit that causes the search unit to search for another route different from the route being guided, a notification unit that notifies the searched different route, and the different route are notified. And an input means for accepting an instruction input from a user as to whether or not to switch the route to be guided from the route being guided to the other route, and the control means is configured to guide the route to be guided during the guidance. When an instruction input indicating that the route is not switched to another route is accepted, the search for the other route is not performed until a predetermined time elapses after the instruction input is accepted. And controlling the searching means.

  Further, the route display device according to the invention of claim 3 is a route display device comprising a display means for displaying a route, and when an event occurs that makes it difficult to move the moving body along the route being displayed. A search control unit that causes the search unit to search for another route different from the currently displayed route, a display control unit that displays the searched another route on the display unit, an input unit that receives an instruction input from a user, The display control means is configured to display the different route when an instruction input indicating that the route to be displayed is not switched from the currently displayed route to the different route is received when the different route is displayed. The display means is controlled so as not to be displayed afterward and the display of the display of another route is canceled, and the display of the other route is displayed during the display of the display of the other route being canceled. When the instruction input to release the cancellation is received, and controlling said display means to display said further path.

  The search control method according to the invention of claim 4 is a search control method in a navigation device, wherein an acquisition step of acquiring information on an event that makes it difficult to move a moving body, and information on the event is acquired. A determination step of determining whether or not there is an event that makes it difficult to move the moving body on the route being guided, and an event that makes it difficult to move the moving body on the route that is being guided When it is determined that there is a search, the navigation device searches for a different route different from the route being guided, a notification step of notifying the searched different route, and when the different route is notified In addition, an input step of receiving from the user an instruction input as to whether or not to switch the route to be guided from the route being guided to the another route; and not switching the route to be guided from the route being guided to the another route. When the instruction input effect is accepted, characterized in that it contains a control step of controlling the different routes the navigation device so as not to explore subsequently the.

  The search control method according to the invention of claim 5 is a search control method in a navigation device, wherein an acquisition step of acquiring information on an event that makes it difficult to move a moving body, and information on the event is acquired. A determination step of determining whether or not there is an event that makes it difficult to move the moving body on the route being guided, and an event that makes it difficult to move the moving body on the route that is being guided When it is determined that there is a search, the navigation device searches for a different route different from the route being guided, a notification step of notifying the searched different route, and when the different route is notified In addition, an input step of receiving from the user an instruction input as to whether or not to switch the route to be guided from the route being guided to the another route; and not switching the route to be guided from the route being guided to the another route. A control step of controlling the navigation device so as not to search for another route until a predetermined time elapses after the instruction input is received when the instruction input is received. It is characterized by.

  According to a sixth aspect of the present invention, there is provided a display control method for a route display device for displaying a route, the acquisition step for acquiring information on an event that makes it difficult to move a moving object, and the event A determination step of determining whether or not there is an event that makes it difficult to move the moving object on the displayed route, and movement of the moving object on the displayed route. A search step for causing the search means to search for a different route different from the currently displayed route, and a display step for causing the route display device to display the searched different route. A first input step of receiving an instruction input from a user as to whether or not to switch the route to be displayed from the currently displayed route to the other route when the different route is displayed; and From the displayed route A first control for controlling the route display device so as not to display the other route and to display that the display of the other route is canceled when an instruction input not switching to the route is accepted. A second input step of receiving an instruction input from a user as to whether or not to cancel the cancellation of the display of the different route during a display indicating that the display of the different route is canceled; And a second control step of controlling the display means so as to display the another route when an instruction input for canceling the display cancellation is received.

  According to a seventh aspect of the present invention, a search control program causes a computer to execute the search control method according to the fourth or fifth aspect.

  A display control program according to an invention of claim 8 causes a computer to execute the display control method according to claim 6.

  According to a ninth aspect of the present invention, there is provided a recording medium that can be executed by a computer that records the search control program according to the seventh aspect or the display control program according to the eighth aspect.

  Exemplary embodiments of a navigation device, a route display device, a search control method, a display control method, a search control program, a display control program, and a recording medium according to the present invention are explained in detail below with reference to the accompanying drawings.

(Embodiment)
First, the functional configuration of the navigation device 100 according to the embodiment will be described. FIG. 1 is a block diagram illustrating a functional configuration of the navigation device according to the embodiment. The navigation device 100 includes a guidance unit 101, a search unit 102, a control unit 103, a notification unit 104, and an input unit 105.

  The guiding unit 101 guides the moving body along the route by displaying a map information screen or outputting guidance voice. The route guidance by the guide unit 101 is performed, for example, along the route searched by the search unit 102 described later.

  The search unit 102 searches for a route along which the moving body moves based on the control of the control unit 103. The search unit 102 searches for a route to a destination point designated by the user of the navigation device 100, for example.

  The control unit 103 causes the search unit 102 to search for another route that is different from the route being guided when an event that makes it difficult for the guide unit 101 to move the moving object along the route being guided occurs. An event that makes it difficult for a moving object to move along the route being guided is, for example, when there is a traffic jam on the route being guided or when the current location of the moving object is significantly different from the route being guided. It is.

  In addition, another route is a part of the route, for example, to avoid a route from the current location of the moving object to the destination, or an event that makes it difficult for the moving object to move along the route being guided. It is a detour part.

  The notification unit 104 notifies the searched alternative route. The alerting | reporting part 104 alert | reports another route by, for example, displaying the searched another route on a display screen so that it may overlap with map information. Further, for example, another route may be notified by outputting a rough guidance on the other route.

  When the different route is notified, the input unit 105 receives from the user an instruction input as to whether or not to switch the route to be guided by the guide unit 101 from the route being guided to another route. For example, the input unit 105 displays a selection screen as to whether or not to select another route on the display screen, and accepts a selection input by the user. For example, it is good also as receiving the instruction | indication input performed with an audio | voice.

  When the input unit 105 receives an instruction input indicating that the route to be guided by the guide unit 101 is not switched from the route being guided to another route, the control unit 103 searches for another route by the subsequent search unit 102. To control. Specifically, for example, when the control unit 103 receives an instruction input indicating that the route to be guided is not switched from the route being guided to another route, the control unit 103 causes the search unit 102 not to search for the other route. Control.

  Further, for example, when the control unit 103 receives an instruction input indicating that the route to be guided is not switched from the route being guided to another route, the control unit 103 separates the route from when the instruction input is received until a predetermined time elapses. The search unit 102 may be controlled so as not to search for a route.

  Next, route search processing by the navigation device 100 will be described. FIG. 2 is a flowchart showing a procedure of route search processing by the navigation device. In the flowchart of FIG. 2, the navigation device 100 first determines whether or not an event has occurred that makes it difficult for the moving body to move along the route being guided (step S201).

  Until an event that makes it difficult for the moving body to move along the route being guided occurs (step S201: No), guidance is performed along the route being guided (step S202), and the processing returns to step S201, and the subsequent processing. repeat. On the other hand, when an event that makes it difficult for the moving body to move along the route being guided occurs (step S201: Yes), the control unit 103 causes the search unit 102 to search for another route different from the route being guided. (Step S203).

  Then, the notification unit 104 notifies the other route searched in step S203 (step S204), and receives an instruction input as to whether or not to switch the guidance target route from the route being guided to another route (step S205). When switching to another route (step S206: Yes), that is, when receiving an instruction input for switching the route to be guided from the route being guided to another route, the processing according to this flowchart is terminated.

  On the other hand, when the route is not switched to another route (step S206: No), that is, when an instruction input indicating that the route to be guided is not switched from the route being guided to another route is received, the control unit 103 causes the search unit 102 to The subsequent search for another route is controlled (step S207), and the processing according to this flowchart ends.

  In the navigation device 100 described above, the control unit 103 controls the search for another route by the search unit 102. For example, in a route display device that displays a route, the display of another route is controlled. Also good. FIG. 3 is a block diagram of a functional configuration of the route display device according to the embodiment. The route display device 300 includes a display unit 301, a search unit 302, a control unit 303, and an input unit 304.

  The display unit 301 displays a route along which the moving body moves. The search unit 302 searches for a different route that is different from the currently displayed route when an event that makes it difficult for the moving object to move along the currently displayed route occurs. The control unit 303 causes the display unit 301 to display the searched alternative route. When another route is displayed, the input unit 304 receives an instruction input from the user regarding whether or not to switch the route to be displayed from the currently displayed route to another route.

  Then, the control unit 303 controls the display unit 301 not to display the separate route thereafter when an instruction input indicating that the display target route is not switched from the currently displayed route to another route is received.

  As described above, according to the navigation device 100 according to the embodiment, when an event that makes it difficult to move the mobile body along the displayed route occurs, such as when a traffic jam occurs, the current location of the mobile body Search for another route from to the destination. If the searched alternative route is not selected by the user, the alternative route is not searched (displayed) again. Alternatively, when the user cancels the detour, the detour search (display) is not performed within a predetermined time.

  Thereby, it is possible to prevent a route unnecessary for the user from being searched (displayed). Moreover, it is possible to prevent the user's attention from being distracted by presenting unnecessary route information. In particular, when the user is driving, presenting more information than necessary may distract the user's attention and cause a traffic accident due to carelessness ahead. The navigation device 100 does not search (display) again the detour route canceled by the user, and does not present unnecessary information.

(Hardware configuration of navigation device 400)
Next, examples of the navigation device 100 according to the above-described embodiment will be described. FIG. 4 is a block diagram of a hardware configuration of the navigation device according to the embodiment.

  In FIG. 4, a navigation device 400 includes a CPU 401, a ROM 402, a RAM (memory) 403, a magnetic disk drive 404, a magnetic disk 405, an optical disk drive 406, an optical disk 407, and an audio I / F (interface) 408. A microphone 409, a speaker 410, an input device 411, a video I / F 412, a camera 413, a display 414, a communication I / F 415, a GPS unit 416, and various sensors 417. Each component 401 to 417 is connected by a bus 420.

  The CPU 401 governs overall control of the navigation device 400. The ROM 402 records programs such as a boot program, a communication program, a database creation program, and a data analysis program. The RAM 403 is used as a work area for the CPU 401.

  The magnetic disk drive 404 controls the reading / writing of the data with respect to the magnetic disk 405 according to control of CPU401. The magnetic disk 405 records data written under the control of the magnetic disk drive 404. As the magnetic disk 405, for example, an HD (hard disk) or an FD (flexible disk) can be used.

  The optical disk drive 406 controls the reading / writing of the data with respect to the optical disk 407 according to control of CPU401. The optical disc 407 is a detachable recording medium from which data is read according to the control of the optical disc drive 406. As the optical disc 407, a writable recording medium can be used. In addition to the optical disk 407, the removable recording medium may be an MO, a memory card, or the like.

  Another example of information recorded on the magnetic disk 405 and the optical disk 407 is map data used for route search and route guidance. The map data includes background data representing features (features) such as buildings, rivers, and the ground surface, and road shape data representing the shape of the road. The map data is displayed in two or three dimensions on the display screen of the display 414. Drawn. When the navigation device 400 is guiding a route, the map data and the current location of the vehicle acquired by the CPU 301 are displayed in an overlapping manner.

  Here, the background data further includes background shape data representing the shape of the background and background type data representing the type of the background. The background shape data includes, for example, feature representative points, polylines, polygons, feature coordinates, and the like. The background type data includes, for example, text data representing the name, address, and telephone number of a feature, and type data of a feature such as a building, river, or ground surface.

  Furthermore, regarding major facilities (POI: Point of Interest) in the map, information such as business hours and the presence or absence of a parking lot is included as facility information. Furthermore, among the features, facilities provided for a predetermined purpose, such as “gas station” and “convenience store”, are classified according to their types. Then, the representative point and coordinate data of the feature and the facility information / genre information are associated with each other. The genre into which the facility is classified at this time includes, for example, a parking lot and a station in addition to the above-mentioned gas station and convenience store.

  The road shape data further includes traffic condition data. The traffic condition data includes, for example, whether or not there is a signal or a pedestrian crossing, whether or not there is a highway doorway or junction, the length (distance) of each link, road width, direction of travel, road type (highway, Such as toll roads and general roads).

  The traffic condition data stores past traffic information obtained by statistically processing past traffic information based on seasons, days of the week, large holidays, and time. The navigation device 400 obtains information on a traffic jam that is currently occurring from road traffic information received by a communication I / F 415, which will be described later, and can predict a traffic jam situation at a specified time based on past traffic jam information. Become.

  The audio I / F 408 is connected to a microphone 409 for audio input and a speaker 410 for audio output. The sound received by the microphone 409 is A / D converted in the sound I / F 408. In addition, sound is output from the speaker 410. Note that the voice input from the microphone 409 can be recorded on the magnetic disk 405 or the optical disk 407 as voice data.

  Examples of the input device 411 include a remote controller including a plurality of keys for inputting characters, numerical values, various instructions, a keyboard, a mouse, a touch panel, and the like. Further, the input device 411 can be connected to another information processing terminal such as a digital camera or a mobile phone terminal to input / output data.

  The video I / F 412 is connected to a camera 413 for video input and a display 414 for video output. Specifically, the video I / F 412 includes, for example, a graphic controller that controls the entire display 414, a buffer memory such as a VRAM (Video RAM) that temporarily records image information that can be displayed immediately, and a graphic controller. Based on the output image data, the display 414 is configured by a control IC that controls display.

  The camera 413 captures images inside and outside the vehicle and outputs them as image data. An image captured by the camera 413 can be recorded on the magnetic disk 405 or the optical disk 407 as image data. The display 414 displays icons, cursors, menus, windows, or various data such as characters and images. As the display 414, for example, a CRT, a TFT liquid crystal display, a plasma display, or the like can be adopted.

  The communication I / F 415 is connected to a network via wireless and functions as an interface between the navigation device 400 and the CPU 401. The communication I / F 415 is further connected to a communication network such as the Internet via wireless, and also functions as an interface between the communication network and the CPU 401.

  Communication networks include LANs, WANs, public line networks and mobile phone networks. Specifically, the communication I / F 415 includes, for example, an FM tuner, a VICS (Vehicle Information and Communication System) / beacon receiver, a radio navigation device, and other navigation devices. Get road traffic information such as regulations. VICS is a registered trademark.

  The GPS unit 416 receives radio waves from GPS satellites and calculates information indicating the current position of the vehicle (current position of the navigation device 400). The output information of the GPS unit 416 is used when the current position of the vehicle is calculated by the CPU 401 together with output values of various sensors 417 described later. The information indicating the current location is information for specifying one point on the map data, such as latitude / longitude and altitude.

  The various sensors 417 output information that can determine the position and behavior of the vehicle, such as a vehicle speed sensor, an acceleration sensor, and an angular velocity sensor. The output values of the various sensors 417 are used by the CPU 401 to calculate the current location of the vehicle and to measure the amount of change in speed and direction. In addition, the navigation apparatus 400 is good also as data which record the output value of various sensors 417 with a drive recorder function.

  Here, in the configuration of the navigation device 100 according to the embodiment, the guidance unit 101 and the notification unit 104 include the search unit 102 and the control unit 103 by the CPU 401, the audio I / F 408, the speaker 410, the video I / F 412, and the display 414. These functions are realized by the CPU 401 and the input unit 105 by the input device 411.

(Reroute processing of navigation device 400)
Next, the reroute process of the navigation device 400 will be described. The navigation device 400 searches for a route to a destination point set by the user, and performs navigation (route guidance) processing along the searched route. On the other hand, if the situation changes during the navigation process due to factors that cannot be anticipated during the initial route search, the route to the destination point is searched again (reroute) so that the user can select the optimum route. ing.

  The main reason for reroute is the change in traffic conditions. In the route search, an actual road condition acquired by VICS (registered trademark) information, a past traffic statistics value included in map data, and the like are taken into consideration. For this reason, for example, when traffic conditions change after the initial route search, such as when traffic congestion occurs on the route, reroute is performed in order to obtain an optimal route while reflecting the change in traffic conditions.

  In addition to this, when a vehicle equipped with the navigation device 400 deviates from the route being guided, the vehicle is returned to the route being guided, or the route from the current point of the vehicle to the destination point is re-searched. In order to do this, a reroute is performed.

  However, even when a reroute is performed, the user does not always select a route searched by the reroute (hereinafter referred to as a detour). For example, even if the arrival time at the destination point is somewhat delayed due to traffic jams, if the user wants to travel on a route that he / she is used to running, he / she would like to travel on the route he / she is currently traveling on without selecting a detour. It is done.

  In this way, even when the user is traveling on the route selected by himself / herself, if the cause of the reroute (for example, traffic jams occurring on the route) has not been resolved, again for the same reason A reroute is performed and a detour is notified. Such processing becomes complicated for the user, and the navigation device 400 also performs useless processing.

  Therefore, when the user cancels the reroute, the navigation device 400 prevents the same detour from being searched again or does not perform the reroute until a predetermined time elapses. Thereby, the reroute process can be performed without making the user feel complicated, and the process of the navigation device 400 can be reduced. Hereinafter, processing when searching while avoiding the same detour (same detour rerouting), and processing when searching for a route within a predetermined time after canceling the detour (preventing rerouting during predetermined time) ).

  FIG. 5 and FIG. 6 are flowcharts showing the same bypass avoidance reroute processing procedure by the navigation device. In the following description, it is assumed that the trigger for searching for a detour (reroute) is a traffic jam on the currently traveling route.

  In the flowchart of FIG. 5, the navigation device 400 first performs route guidance along a route that is currently running (hereinafter, referred to as a current route) (step S501). Then, it is determined whether or not the current point of the vehicle (navigation device 400) has reached the destination point set by the user (step S502).

  If the destination point has been reached (step S502: Yes), the processing according to this flowchart is terminated. The determination as to whether or not the destination point has been reached is made based on, for example, whether or not the current point of the vehicle calculated by the CPU 401 matches the destination point set by the user.

  On the other hand, while not reaching the destination point (step S502: No), road traffic information is acquired by the communication I / F 415 or the like (step S503), and it is determined whether there is traffic on the current route (step S504). . The determination as to whether or not there is a traffic jam may be made using actual road traffic information acquired by the communication I / F 415 or the like, for example, included in the map information recorded on the magnetic disk 405 or the optical disk 407. The traffic jam may be predicted from the past traffic jam information.

  If there is no traffic jam on the current route (step S504: No), the process returns to step S502 and the subsequent processing is continued. On the other hand, if there is a traffic jam on the current route (step S504: Yes), a bypass is searched for avoiding the traffic jam and reaching the destination point more efficiently (step S505). At this time, there may be one or more detours to be searched for. The navigation apparatus 400 displays the searched detour on the display 414 (step S506), and determines whether or not the user selects the detour (step S507).

  The determination as to whether or not the user selects a detour is made, for example, by determining whether or not the user has given an instruction to switch the guide route to the detour via the input device 411. If a plurality of detours are searched in step S505, it is determined whether any one of the detours has been selected. When selecting a detour (step S507: Yes), route guidance is performed along the detour (step S508), the process returns to step S502, and the subsequent processing is continued.

  On the other hand, when the detour is not selected (step S507: No), the detour not selected is recorded (step S509). This is to prevent searching for the same detour as described later. The unselected bypass recorded at this time is hereinafter referred to as a storage bypass. Then, the route guidance is continued along the current route (step S510), and the process proceeds to step S511 in FIG.

  Turning to the description of FIG. 6, the navigation apparatus 400 determines whether or not the current point of the vehicle has reached the destination point (step S511). When the destination point has been reached (step S511: Yes), the processing according to this flowchart is terminated.

  On the other hand, when the destination point is not reached (step S511: No), road traffic information is acquired again by the communication I / F 415 or the like (step S512), and it is determined whether or not there is a traffic jam on the current route (step S513). ). If there is no traffic jam on the current route (step S503: No), the process returns to step S511 and the subsequent processing is continued.

  On the other hand, when there is a traffic jam on the current route (step S513: Yes), the traffic route is avoided and a detour for reaching the destination point more efficiently is searched (step S514). Then, the navigation device 400 determines whether or not the detour searched this time includes the same detour as the storage detour stored in step S509 (step S515).

  When the same route as the storage detour is included (step S515: Yes), the storage detour is removed from the detour searched in step S514 (step S516). Then, it is determined whether there is a detour that can be displayed (step S517). If there is a detour that can be displayed (step S517: Yes), the detour is displayed on the display 413 (step S518). On the other hand, when there is no detour that can be displayed (step S517: No), the process proceeds to step S521.

  If the same route as the storage detour is not included in step S515 (step S515: No), the detour searched in step S514 is displayed on the display 414 as it is (step S518).

  Then, it is determined whether or not the user selects a detour (step S519). When a detour is selected (step S519: Yes), route guidance is performed along the detour (step S520). Until it reaches (step S521: No), the process returns to step S512 and the subsequent processing is continued.

  On the other hand, when the detour is not selected (step S519: No), the detour that has not been selected is stored (step S522), the process returns to step S510 in FIG. 5, and the subsequent processing is continued.

  Next, the avoidance reroute process within a predetermined time will be described. FIG. 7 and FIG. 8 are flowcharts showing a procedure of the avoidance reroute processing within a predetermined time by the navigation device. In the flowchart of FIG. 7, the navigation device 400 first performs route guidance along the current route (step S701). Then, it is determined whether or not the current point of the vehicle (navigation device 400) has reached the destination point set by the user (step S702).

  If the destination point has been reached (step S702: Yes), the processing according to this flowchart is terminated. The determination as to whether or not the destination point has been reached is made based on, for example, whether or not the current point of the vehicle calculated by the CPU 401 matches the destination point set by the user.

  On the other hand, while not reaching the destination point (step S702: No), road traffic information is acquired by the communication I / F 415 or the like (step S703), and it is determined whether there is traffic on the current route (step S704). . The determination as to whether or not there is a traffic jam may be made using actual road traffic information acquired by the communication I / F 415 or the like, for example, included in the map information recorded on the magnetic disk 405 or the optical disk 407. The traffic jam may be predicted from the past traffic jam information.

  If there is no traffic jam on the current route (step S704: No), the process returns to step S702 and the subsequent processing is continued. On the other hand, when there is a traffic jam on the current route (step S704: Yes), a detour for avoiding the traffic jam and reaching the destination more efficiently is searched (step S705). At this time, a plurality of detours may be searched. The navigation apparatus 400 displays the searched detour on the display 414 (step S706), and determines whether or not the user selects the detour (step S707).

  The determination as to whether or not the user selects a detour is made, for example, by determining whether or not the user has given an instruction to switch the guide route to the detour via the input device 411. In step S705, if a plurality of detours are searched, it is determined whether any one of the detours has been selected.

  When selecting a detour (step S707: Yes), route guidance is performed along the detour (step S708), the process returns to step S702, and the subsequent processing is continued. On the other hand, when the detour is not selected (step S707: No), the process proceeds to step S709 in FIG.

  Moving to the description of FIG. 8, when the detour is not selected in step S707 of FIG. 7, the navigation device 400 continues route guidance along the current route (step S709). Then, the road traffic information is acquired again by the communication I / F 415 or the like (step S710), and it is determined whether there is a traffic jam on the current route (step S711).

  If there is a traffic jam on the current route (step S711: Yes), it is determined whether or not a predetermined time has elapsed since the previous reroute cancellation (step S712). The reroute cancellation is a case where it is determined in step S707 in FIG. 7 or step S715 described later that no detour is selected. In addition, the predetermined time may be a specific time, for example, several minutes or several hours after the reroute cancellation, until the day when the reroute is canceled, or a heavy traffic jam time until the destination point at the time of traveling is reached. It may be an uncertain time such as until the belt passes.

  When the predetermined time has elapsed since the previous reroute cancellation (step S712: Yes), a detour for avoiding traffic jam and reaching the destination more efficiently is searched (step S713). Then, the detour is displayed on the display 414 (step S714), and it is determined whether or not the user selects the detour (step S715).

  When a detour is selected (step S715: Yes), route guidance is performed along the detour (step S716), and the process returns to step S710 until the destination point is reached (step S717: No), and the subsequent processing Continue. And if it arrives at the destination point (step S717: Yes), the process by this flowchart will be complete | finished.

  If there is no traffic jam on the current route in step S711 (step S711: No), a predetermined time has not elapsed since the previous reroute cancellation in step S712 (step S712: No), and a detour in step S715 Is not selected (step S715: No), the process proceeds to step S717.

  Through the processing as described above, the navigation device 400 guides to the destination point while repeatedly searching for a detour (reroute). The trigger for searching for a detour is not limited to the occurrence of a traffic jam, and may be, for example, when the vehicle travels off the current route or when the vehicle cannot travel on the road due to traffic restrictions.

  FIG. 9 is an explanatory diagram illustrating an example of a screen display when the display of the detour is canceled. The case where the display of the detour is cancelled is, for example, the case where the detour is not displayed by the rerouting process within a predetermined time, or the storage detour is removed by the same detour avoiding reroute process. Is the case.

  The display 414 of the navigation device 400 displays a position display S indicating the current location of the vehicle on which the navigation device 400 is mounted, and a map around the route currently being traveled. In addition, an arrow P indicating the guidance route of the currently traveling route is displayed in front of the traveling direction of the vehicle. That is, in the example of FIG. 9, the vehicle is guided to turn right at the intersection C.

  On the other hand, in the lower left of the display 414, a cancel display 901 indicating that the display of the detour is canceled is displayed. By displaying the cancel display 901, the user can know that the navigation device 400 currently restricts the display of the detour.

  Further, when it is desired to display a detour route whose display has been canceled, the cancel of the display can be canceled by pressing a cancel cancel button 902. In addition to the display of the cancel display 901, guidance voices, sound effects, etc. may be output from the speaker 410 (not shown). Further, a visual effect such as blinking the cancel display 901 may be generated.

  As described above, according to the navigation device 400, when an event occurs that makes it difficult for the vehicle to move along the displayed route, such as when there is a traffic jam, another route from the current point of the vehicle to the destination point. Explore. If the searched alternative route is not selected by the user, the alternative route is not searched (displayed) again. Alternatively, when the user cancels the detour, the detour search (display) is not performed within a predetermined time.

  Thereby, unnecessary information is not displayed on the display 414, and the user's attention can be prevented from being distracted. In particular, when the user is driving, displaying more information than necessary on the display 414 may direct the user's attention to the display 414, which may cause a traffic accident due to carelessness ahead. The navigation device 400 does not search (display) again the detour route canceled by the user, and does not display more information than necessary on the display 414.

  Further, by displaying a cancel indication 901 on the display 414 that the search (display) of the detour has been canceled, the user can visually check the detour search (display) status. Furthermore, by displaying the cancel cancel button 902 together with the cancel display 901, the search (display) cancel can be canceled based on the user's will.

  The search control method and the display control method described in this embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. Further, this program may be a transmission medium that can be distributed via a network such as the Internet.

It is a block diagram which shows the functional structure of the navigation apparatus concerning embodiment. It is a flowchart which shows the procedure of the route search process by a navigation apparatus. It is a block diagram which shows the functional structure of the route display apparatus concerning embodiment. It is a block diagram which shows the hardware constitutions of the navigation apparatus concerning an Example. It is a flowchart which shows the procedure of the same detour avoidance reroute process by a navigation apparatus. It is a flowchart which shows the procedure of the same detour avoidance reroute process by a navigation apparatus. It is a flowchart which shows the procedure of the avoidance reroute process within predetermined time by a navigation apparatus. It is a flowchart which shows the procedure of the avoidance reroute process within predetermined time by a navigation apparatus. It is explanatory drawing which shows an example of the screen display when the display of a detour is canceled.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Navigation apparatus 101 Guidance part 102 Search part 103 Control part 104 Notification part 105 Input part 300 Path | route display apparatus 301 Display part 302 Search part 303 Control part 304 Input part

Claims (9)

A navigation device comprising search means for searching for a route and guidance means for guiding the searched route,
Control means for causing the search means to search for another route different from the route being guided when an event that makes it difficult to move the moving body along the route being guided occurs;
Informing means for informing the searched alternative route;
An input means for receiving from the user an instruction input as to whether or not to switch the route to be guided from the route being guided to the another route when the other route is notified;
With
The control means controls the search of the different route by the search means when the instruction input indicating that the route to be guided is not switched from the route being guided to the different route is accepted. A featured navigation device.   The control means controls the search means so as not to search for another route after receiving an instruction input indicating that the route to be guided is not switched from the route being guided to the another route. The navigation device according to claim 1, wherein   When the control means receives an instruction input indicating that the route to be guided is not switched from the route being guided to the another route, the control means continues to wait until a predetermined time elapses after the instruction input is received. The navigation device according to claim 1, wherein the search unit is controlled so as not to search for a route. A route display device comprising display means for displaying a route,
A search means for searching for a different route different from the displayed route when an event that makes it difficult to move the moving object along the displayed route;
Control means for causing the display means to display the searched alternative route;
An input means for receiving from the user an instruction input as to whether or not to switch the route to be displayed from the route being displayed to the another route when the other route is displayed;
With
The control means controls the display means not to display the separate route thereafter when an instruction input indicating that the route to be displayed is not switched from the currently displayed route to the separate route is accepted. A route display device characterized by the above. A search control method in a navigation device,
An acquisition step of acquiring information of an event that makes it difficult to move the moving object;
A determination step of determining whether or not there is an event that makes the movement of the moving object difficult on the route being guided when the information of the event is acquired;
A search step for causing the navigation device to search for another route different from the route being guided when it is determined that there is an event that makes it difficult to move the moving body on the route being guided;
A notification step of notifying the searched alternative route;
An input step of receiving from the user an instruction input as to whether or not to switch the route to be guided from the route being guided to the another route when the other route is notified;
A control step of controlling a search for the different route by the navigation device after that when an instruction input indicating that the route to be guided is not switched from the route being guided to the different route is received;
The search control method characterized by including. A display control method in a route display device for displaying a route,
An acquisition step of acquiring information of an event that makes it difficult to move the moving object;
A determination step of determining whether or not there is an event that makes the movement of the moving object difficult on the displayed route when the event information is acquired; and
When it is determined that there is an event that makes it difficult to move the moving object on the displayed route, a search step for searching for another route different from the displayed route;
A display step of displaying the searched other route on the route display device;
An input step of receiving from the user an instruction input as to whether or not to switch the display target route from the displayed route to the different route when the different route is displayed;
A control step of controlling the route display device so as not to display the separate route thereafter, when an instruction input indicating that the route to be displayed is not switched from the currently displayed route to the separate route is received;
The display control method characterized by including.   A search control program for causing a computer to execute the search control method according to claim 5.   A display control program for causing a computer to execute the display control method according to claim 6.   A recording medium executable on a computer in which the search control program according to claim 7 or the display control program according to claim 8 is recorded.

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