JP2011053082A - Navigation apparatus, route search method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation apparatus, a route search method, and a program capable of re-searching an optimum route in accordance with the driver's ability of dealing with a route change when a travel route is mistaken. <P>SOLUTION: In the navigation apparatus including a control means searching for a guidance route from the current location to a destination and controlling the display of a searched guidance route on a display means, the control means is caused to obtain a vehicle speed when the vehicle is deviated from the guidance route, determine a guidance start point in accordance with the speed and the margin, search for a guidance route from the guidance start point to the destination, determine whether the vehicle has succeeded in traveling on the searched guidance route, reduce the margin when it has succeeded, and increase the margin when it has failed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a navigation device, a route search method, and a program.

  2. Description of the Related Art Conventionally, a navigation device having a function of performing a route search (route search) to a destination and guiding a guidance route according to a search result has been proposed. The navigation device displays a map around the current location of the host vehicle on the screen and superimposes a current location mark indicating the current location of the host vehicle on the map. And the display of a screen is updated at any time with the change of the present location of the own vehicle.

  Further, when the departure point and the destination are set by the driver, the navigation device searches for the optimum route from the departure point to the destination using the map data. Then, the optimal route is displayed on the screen together with the current location mark.

  In such a navigation device, if the current position deviates from the guidance route, it is not possible to provide appropriate guidance. Therefore, a new off-route detection function and a route re-search function are provided, and when a off-route is detected, a route in the vicinity or all routes to the destination are re-searched.

  As an example of a navigation device having the above configuration, for example, Patent Literature 1 is disclosed. In Patent Document 1, it is determined whether the vehicle is traveling on the searched route. If it is determined that the vehicle has deviated from the route, the speed of the vehicle is detected, and it is necessary to start guidance according to the speed. Disclosed a technique for determining a proper distance, acquiring road information of a road that is currently running and a road in a traveling direction, and determining a guidance start point from the determined distance and the acquired road information to search for a route Has been.

JP-A-11-51681

  However, the return route guidance timing by the conventional navigation device is not set according to the driver's ability to respond to a route change or the like (for example, consciousness, judgment, physical ability, etc.), but is selected uniformly. It is a thing.

  In many cases, guidance for a return route by re-searching occurs at an unexpected timing that is unpredictable to the driver. As a result of this sudden guidance timing, the driver's ability to respond to route changes, etc., surrounding traffic conditions (congestion etc.), or road conditions (traffic regulations such as lane change prohibition) may be safe and smooth on the return route. There is a situation in which it is difficult to return to the return route because the opportunity to change course is missed without being able to make the transition.

  As described above, according to the conventional navigation device, a driver who has low ability to respond to changes in the driving environment is forced to drive with a margin in terms of driving operation, and conversely, a driver who has high ability to respond has a detour. There was an inconvenience to drive the route to become.

  An object of the present invention is to provide a navigation device, a route search method, and a program capable of performing an optimum route re-search according to a driver's ability to cope with a route change when a driving route is mistaken.

  The invention described in claim 1 is made to achieve the above object, and includes a display means having a screen for displaying a map, an operating means for setting a destination, and an ability to cope with a driver's route change. Is stored as a margin, current position detection means for detecting the current position of the vehicle, a guide route from the current position to the destination is searched, and the searched guide route is displayed on the display means. A navigation device comprising: a control means for controlling display; and when the control means detects that the vehicle has deviated from the guide route, the control means obtains the speed of the vehicle and sets the speed and the margin. Accordingly, the vehicle further includes return route search means for determining a guidance start point and searching for a guide route from the guidance start point to the destination, and the vehicle is searched by the return route search means. A guide route on the process determines whether or not successfully run was, if successful reduced the margin, if it fails, characterized in that increasing the margin.

  According to a second aspect of the present invention, in the navigation device according to the first aspect, the margin is expressed by a distance and time required when the driver responds to a route change.

  According to a third aspect of the present invention, in the navigation device according to the first or second aspect, when the control unit succeeds in traveling on the guide route searched by the return route searching unit, Determining whether the vehicle has made a right or left turn within a predetermined distance from the guidance start point, reducing the margin when making a right or left turn, and maintaining the margin as it is when making no right or left turn. And

  The invention according to claim 4 is a display means having a screen for displaying a map, an operation means for setting a destination, a storage means for storing a driver's ability to change the route as a margin, and a current vehicle A navigation apparatus comprising: a current position detection unit that detects a position; and a control unit that searches for a guide route from the current position to the destination and controls display of the searched guide route on the display unit. In the route search method, when the control unit detects that the vehicle has deviated from the guide route, the speed of the vehicle is acquired and a guidance start point is determined according to the speed and the margin. Then, a guidance route from the guidance start point to the destination is searched, and it is determined whether or not the vehicle has successfully traveled on the searched guidance route. Degrees reduces, if it fails a route search method comprising the step of increasing the margin.

  According to the fifth aspect of the present invention, the computer includes display means having a screen for displaying a map, operation means for setting a destination, storage means for storing a driver's ability to change the route as a margin, current vehicle Current position detecting means for detecting a position; searching for a guide route from the current position to the destination; and detecting that the vehicle deviates from the searched guide route; The guidance start point is determined according to the speed and the margin, the guidance route from the guidance start point to the destination is searched, and the vehicle has successfully traveled on the searched guidance route. It is a program for functioning as a control unit that decreases the margin when it is successful and increases the margin when it fails.

  According to the present invention, it is possible to provide a navigation device, a route search method, and a program capable of performing an optimal route re-search according to the driver's ability to cope with route change when a driving route is mistaken.

It is a block diagram which shows schematic structure of the navigation apparatus 100 which concerns on this embodiment. It is the flowchart shown about an example of the automatic reroute process performed within the navigation apparatus 100 which concerns on this embodiment. It is the figure shown about the example of a screen of the display part 1 when the automatic reroute process is performed.

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

FIG. 1 is a block diagram illustrating a schematic configuration of a navigation device 100 according to the present embodiment.
As shown in FIG. 1, the navigation device 100 includes a display unit 1, an operation unit 2, an audio output unit 3, a storage unit 4, a current position detection unit 5, and a control unit 6. The

The display unit 1 includes a display such as an LCD (Liquid Crystal Display) or an organic EL (Electro Luminescence) display, for example, and an operation for detecting an operation by a driver (for example, pressing by a finger or a touch pen) on the display. A touch panel having a function as the unit 2 is placed.
Based on the display data (map data and the like) output from the control unit 6, the display unit 1 displays various information (for example, display information for navigation such as map screens and icons, route guidance, and the current position of the vehicle). Display own vehicle mark, etc.).
When the touch panel operation by the driver is detected, the coordinates (pressed coordinates) of the detected position are input to the control unit 6.

  The audio output unit 3 includes a D / A converter, an amplifier, a speaker, and the like, converts the audio data output from the control unit 6 into an analog audio signal, and outputs the audio.

The storage unit 4 is composed of, for example, a semiconductor memory, and stores map data 41, audio data 42, and the like. The map data 41 stores, for example, map information covering a wide area (corresponding to a plurality of scales), road information, various symbol information such as facilities, seas, and rivers. In addition, the voice data 42 stores, for example, message data including words, phrases, and the like necessary for route guidance. The map data 41 and the audio data 42 may be a magnetic or optical recording medium such as a CD-ROM (Compact Disk ROM) or a DVD-ROM (Digital Versatile Disc ROM) that is detachably attached to the navigation device 100, You may make it acquire from the server apparatus connected via radio | wireless communication etc.
Further, the storage unit 4 stores the capability corresponding to the driver's route change as a margin. This margin is represented by a distance (margin reference distance) and time (margin reference time) required when the driver responds to a route change.

The current position detection unit 5 includes a GPS module, an autonomous navigation unit, and the like.
The GPS module includes a GPS antenna (not shown). The GPS antenna receives GPS signals transmitted from a plurality of GPS satellites launched into a low earth orbit. The GPS antenna receives GPS signals transmitted from at least three GPS satellites, detects the absolute current position (latitude, longitude) of the vehicle based on the received GPS signals, and outputs the detected position to the control unit 6. .
The autonomous navigation unit includes an angle sensor, a distance sensor, and the like. The angle sensor detects the angular velocity of the vehicle (the rotation angle in the horizontal direction per unit time) and calculates the amount of change in the moving direction. A distance sensor detects the pulse signal output according to rotation of a wheel, and calculates the moving amount | distance of a vehicle. The autonomous navigation unit calculates a relative position change of the vehicle based on the angular velocity signal and the vehicle speed pulse signal, and outputs the change to the control unit 6.

The control unit 6 includes, for example, a CPU (Central Processing Unit) 61, a RAM (Random Access Memory) 62, a ROM (Read Only Memory) 63, and the like, and controls each unit of the navigation device 100.
The CPU 61 controls the navigation device 100 as a whole by reading out the processing program stored in the ROM 63 and developing it in the RAM 62.
The RAM 62 develops the processing program executed by the CPU 61 in the program storage area in the RAM 62, and stores the input data and the processing result generated when the processing program is executed in the data storage area.
The ROM 63 is constituted by a semiconductor memory, for example, and stores a processing program, data, and the like in advance. The ROM 63 stores, for example, an automatic reroute program that automatically re-searches the return route when a vehicle route deviation is detected.

  In addition, the control unit 6 searches for a guide route from the current position to the destination, and controls display of the searched guide route on the display unit 1. In addition, when it is detected that the vehicle has deviated from the guidance route, the vehicle speed is acquired, a guidance start point is determined according to the speed and margin, and a guidance route from the guidance start point to the destination is determined. It has a function as a return route search means for searching, and determines whether or not the vehicle has succeeded in traveling on the searched guide route. Increase margins.

  As described above, the navigation device 100 according to the present embodiment is compatible with display means (display unit 1) having a screen for displaying a map, operation means for setting a destination (operation unit 2), and a driver's route change. Searching for a guide route from the current position to the destination, storage means (storage section 4) for storing the ability to perform as a margin, current position detection means (current position detection section 5) for detecting the current position of the vehicle, Control means (control unit 6) for controlling display of the searched guide route on the display means. Further, when the control means (control unit 6) detects that the vehicle has deviated from the guide route, the control means (the control unit 6) acquires the speed of the vehicle, determines the guide start point according to the speed and margin, and starts the guidance. It further comprises return route search means for searching for a guide route from the point to the destination, and determines whether the vehicle has successfully traveled on the guide route searched by the return route search means. Decrease margin and increase margin if it fails.

  This makes it possible to return the route to the destination at an appropriate timing regardless of the driver's ability to cope with route changes. In addition, the possibility of forcing the driver who is driving to change the lane or to respond quickly is reduced. Furthermore, an event of a more inappropriate driving can be avoided by causing the driver to make an incorrect prediction by being caught by the return route guidance that cannot be handled. In addition, since it is not necessary to have a certain margin at the time of rerouting in accordance with a driver with low driving ability, it is possible for the driver with high driving ability to quickly return to the original route.

  FIG. 2 is a flowchart illustrating an example of an automatic reroute process performed in the navigation device 100 according to the present embodiment. This automatic reroute process is realized by the CPU 61 executing an automatic reroute program stored in the ROM 63 when the destination is set in the navigation device 100 by the driver.

  As shown in FIG. 2, in step S101, initial setting is performed. Here, a margin reference distance and a margin reference time are set. The margin reference distance is a distance that the driver can change the route with a margin, and the margin reference time is a time that the driver can change the route with a margin. In this embodiment, the margin reference distance is set to 300 m and the margin reference time is set to 30 seconds.

  In step S102, it is determined whether or not a vehicle off-route is detected. When the off-route is detected, the process proceeds to the next step S103. When the off-route is not detected, the process waits until the off-route is detected.

In step S103, the current position of the vehicle and the current vehicle speed are acquired.
In step S104, a vehicle speed consideration margin distance is calculated. The vehicle speed consideration margin distance is calculated by “the margin reference time set in step S101 × the current vehicle speed acquired in step S103”.
In step S105, a guidance margin point is set. The guidance margin point is the distance between the margin reference distance set in step S101 and the vehicle speed consideration margin distance calculated in step S104, which has a larger value, from the current position acquired in step S103 along the road. It is the position.

In step S106, the route is re-searched based on the guidance margin points set in step S105.
In step S107, the return route to the destination is displayed on the display unit 1 based on the search result in step S106. And it waits for acquisition of the driving result of a driver.
In step S108, the driving result of the driver is acquired.

  In step S109, it is determined with reference to the traveling result acquired in step S108 whether or not traveling on the return route has succeeded. If the return route travels successfully, the process proceeds to the next step S110, and if the return route travel does not succeed, the process proceeds to step S113.

In step S110, it is determined whether there is a left or right turn within a certain distance from the guidance margin point. If there is a right or left turn within a certain distance from the guidance margin point, the process proceeds to the next step S111, and if there is no right or left turn within a certain distance from the guidance margin point, the process proceeds to step S112.
In step S111, the set margin reference distance and margin reference time are decreased.
In step S112, the set margin reference distance and margin reference time values are held as they are. That is, the driving result of the driver is not reflected in the setting as a learning result.

  In step S113, the set margin reference distance and margin reference time are increased.

  In step S114, it is checked whether or not the margin reference distance and margin reference time values set in steps S111 to S113 are within the range. If the values of the margin reference distance and margin reference time are not within a predetermined range, correction is made so as to be within the ranges.

  FIG. 3 is a diagram illustrating one screen example of the display unit 1 when the automatic reroute process is performed. Here, the destination is indicated by G, and the regular route to the destination is indicated by a dotted line R. The correspondence relationship with the flowchart of FIG. 2 is also shown.

  As shown in FIG. 3, the navigation apparatus 100 mounted on the vehicle detects that the vehicle has deviated from the route (point A: Yes in step S102). When it is detected that the vehicle has deviated from the route, the current position and the current vehicle speed are acquired (point B: step S103). Then, the vehicle speed consideration margin distance is calculated from the preset margin reference time and the current vehicle speed (points C1, C2: step S104).

The vehicle speed consideration margin varies depending on the driver. That is, in the case of a driver with sufficient experience and margin, since the margin reference time is set short, a guidance margin point is set at a relatively close distance from the current position, for example, point D1 (step S105). On the other hand, in the case of a driver who is immature in driving the vehicle, the margin reference time is set to be long, so that a guidance margin point is set at a relatively far distance from the current position, for example, points D2 and D3 (step S105).
When the guidance margin points are set, the return route to the destination is searched again (step S106), and the return route is displayed based on the result (points E1, E2, E3: step S107).

  As described above, when the navigation device 100 according to the present embodiment detects that the vehicle has deviated from the guide route, the navigation device 100 acquires the speed of the vehicle, determines the guidance start point according to the speed and the margin, It is further provided with return route search means for searching for a guide route from the guidance start point to the destination, and it is determined whether the vehicle has successfully traveled on the guide route searched for by the return route search means. If this happens, the margin can be reduced, and if it fails, the margin can be increased.

  This makes it possible to return the route to the destination at an appropriate timing regardless of the driver's ability to cope with route changes. In addition, the possibility of forcing the driver who is driving to change the lane or to respond quickly is reduced. Furthermore, an event of a more inappropriate driving can be avoided by causing the driver to make an incorrect prediction by being caught by the return route guidance that cannot be handled. In addition, since it is not necessary to have a certain margin at the time of rerouting in accordance with a driver with low driving ability, it is possible for the driver with high driving ability to quickly return to the original route.

  As mentioned above, although concretely demonstrated based on embodiment which concerns on this invention, this invention is not limited to the said embodiment, It can change in the range which does not deviate from the summary.

  For example, in the above embodiment, time (margin reference time) and distance (margin reference distance) are used as learning contents, but the current driving situation is added to the calculation method of the fluctuation condition of this value and the vehicle speed consideration margin distance. You may make it do. For example, the time may be acquired from a clock device, and if it is nighttime, the distance to the guidance margin point may be increased, or if the traffic situation is in a traffic jam or there are few lanes, the driving indicated by the device Even if it fails, it may be possible to take measures such as not reflecting the result in the learning.

In the above embodiment, when the reroute reference position (guide margin point) is determined, the vehicle speed consideration margin distance is advanced from the current position along the road, but the road is moved from a position off the original route. You may make it progress to.
In addition, the learning result does not need to be a single one. If the device can store a plurality of user (driver) information and select from the information, it is possible to hold the learning result for each user. .

  In addition, the detailed configuration and detailed operation of each device constituting the navigation device 100 can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 Navigation apparatus 1 Display part 2 Operation part 3 Audio | voice output part 4 Memory | storage part 41 Map data 42 Voice | voice data 5 Current position detection part 6 Control part 61 CPU
62 RAM
63 ROM

Claims (5)

Display means having a screen for displaying a map, operation means for setting a destination, storage means for storing a driver's ability to respond to route changes as a margin, and current position detection means for detecting the current position of the vehicle A navigation device comprising: a control unit that searches for a guide route from the current position to the destination and controls display of the searched guide route on the display unit;
The control means includes
When it is detected that the vehicle has deviated from the guidance route, the speed of the vehicle is acquired, a guidance start point is determined according to the speed and the margin, and the distance from the guidance start point to the destination is determined. A return route search means for searching for a guide route;
It is determined whether or not the vehicle has successfully traveled on the guide route searched by the return route search means, and if it is successful, the margin is decreased, and if it fails, the margin is increased. A navigation device characterized by that. The margin is
The navigation device according to claim 1, wherein the navigation device is represented by a distance and time required when the driver responds to a route change. The control means includes
When the vehicle has successfully traveled on the guidance route searched by the return route searching means, it is determined whether or not the vehicle has made a right or left turn within a predetermined distance from the guidance start point. The navigation device according to claim 1 or 2, wherein the margin is decreased and the margin is maintained as it is when the vehicle does not turn right or left. Display means having a screen for displaying a map, operation means for setting a destination, storage means for storing the ability to respond to a driver's route change as a margin, current position detection means for detecting the current position of the vehicle, A route search method in a navigation device comprising: a search unit that searches for a guide route from the current position to the destination and controls display of the searched guide route on the display unit;
When the control means detects that the vehicle has deviated from the guidance route, the speed of the vehicle is acquired, a guidance start point is determined according to the speed and the margin, and from the guidance start point Search for a guidance route to the destination, determine whether the vehicle has successfully traveled on the searched guidance route, and if successful, reduce the margin, and if unsuccessful A route search method including a step of increasing the margin. Computer
Display means having a screen for displaying a map;
Operation means to set the destination,
Storage means for storing the ability to respond to the driver's route change as a margin;
Current position detecting means for detecting the current position of the vehicle;
When a guide route from the current position to the destination is searched and it is detected that the vehicle has deviated from the searched guide route, the speed of the vehicle is acquired, and the speed and the margin are determined. A guidance start point is determined, a guidance route from the guidance start point to the destination is searched, and it is determined whether or not the vehicle has successfully traveled on the searched guidance route. Control means for decreasing the margin in case, increasing the margin in case of failure,
Program to function as.

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