JP5010333B2 - Travel guidance device, travel guidance method, and computer program - Google Patents

Description

  The present invention relates to a travel guide device, a travel guide method, and a computer program for guiding a specific facility when a vehicle approaches the specific facility.

  2. Description of the Related Art In recent years, a navigation device is often mounted on a vehicle that provides vehicle travel guidance so that a driver can easily arrive at a desired destination. Here, the navigation device detects the current position of the vehicle by a GPS receiver or the like, acquires map data corresponding to the current position through a recording medium such as a DVD-ROM or HDD or a network, and displays it on a liquid crystal monitor. It is a device that can do. Furthermore, such a navigation device has a route search function for searching for the optimum route from the vehicle position to the destination when a desired destination is input, and displays the guidance route on the display screen and approaches the intersection. In such a case, the driver is surely guided to a desired destination by providing voice guidance.

Moreover, in the conventional navigation apparatus, when a specific facility is approached within a predetermined distance, guidance on the specific facility is also performed. For example, in the area around the school, there are many roads that children use as school routes, so it is desirable to guide the child to be careful when the vehicle approaches the school within a predetermined distance. Therefore, in Japanese Patent Laid-Open No. 2002-250632, when the vehicle has entered a school zone that is an area within a predetermined range centered on the school, the fact that the vehicle has entered the school zone is guided by voice and images, A description is given of a travel guide device that, when the vehicle leaves the school zone, similarly guides the user to leave the school zone by voice or image.
JP 2002-250632 A (pages 4 to 6, FIGS. 2 to 4)

  Here, in the travel guidance device described in Patent Document 1 described above, the range of the school zone is fixed to a range within a predetermined radius from the school. Accordingly, when the vehicle is traveling near the boundary of the school zone, there may be a situation where the vehicle repeatedly enters and exits the school zone.

  Hereinafter, a conventional example will be described using a specific example with reference to FIG. As shown in FIG. 10, when the vehicle 101 travels near the boundary of the school zone 103 that is defined within a predetermined radius (for example, within a radius of 500 m) centered on the school 102, first, the school zone at the point A Information indicating that the vehicle has entered 103 is given. Thereafter, at point B, guidance is given that the user has left the school zone 103. Similarly, guidance for entering the school zone 103 is provided at points C and E, and guidance for exiting the school zone 103 is provided at points D and F. Therefore, even though the guidance for entering the school zone 103 at the point A is performed, immediately after that, the guidance for the school zone 103 which is the same area is also performed at the points C and E. In addition, regarding the guidance for leaving the school zone 103, the guidance with the same contents is repeatedly performed even though it is sufficient to perform only at the point F. In addition, repeated guidance of school zones having the same content in this way has little merit for the driver and has resulted in a reduction in the driver's concentration.

  The present invention has been made in order to solve the above-described conventional problems, and by restricting guidance based on the positional relationship between the specific facility and the vehicle, the driver's concentration is reduced by unnecessary guidance. It is an object of the present invention to provide a travel guide device, a travel guide method, and a computer program that are not allowed to occur.

In order to achieve the object, the travel guidance device (1) according to claim 1 of the present application includes a map information storage means (22) for storing map information relating to a map, and a facility for acquiring position information of a specific facility on the map. The information acquisition means (13), the own vehicle position acquisition means (11) for acquiring the current position of the own vehicle, and the distance from the current position of the own vehicle acquired by the own vehicle position acquisition means to the specific facility is The first distance determination means (13) for determining whether or not the distance is equal to or less than one predetermined distance, and the distance from the current position of the vehicle to the specific facility is equal to or less than the first predetermined distance by the first distance determination means. And a guide unit (15, 16) for providing guidance on the specific facility when determined, before the guidance unit performs guidance on the specific facility before the guidance unit performs guidance on the specific facility. A guidance restriction means (13) for restricting guidance concerning a specific facility, and a distance from the current position of the own vehicle acquired by the own vehicle position acquisition means to the specific facility is a second predetermined distance longer than a first predetermined distance; The second distance determining means (13) for determining whether or not the guidance related to the specific facility is restricted by the guidance restricting means, and the second distance judging means determines from the current position of the host vehicle. Guidance restriction release means (13) for releasing the restriction on guidance concerning the specific facility by the guidance restriction means when it is determined that the distance to the specific facility is equal to or greater than a second predetermined distance, and the guidance means, and a display guide means for performing guidance by display on the display device and voice guidance means for performing guidance by voice (15), said guide limiting means, said by the voice guidance unit Laid While not to perform the guidance regarding facilities, by continuously performed in the display guide means guidance regarding the specific facility is not performed guided by the voice guiding means, for limiting the guidance of the guide means It is characterized by that.
Here, “restricting guidance” includes not performing guidance, omitting part of the content of guidance, reducing the volume when guiding by voice, and the like.

Further, the travel guidance device (1) according to claim 2 is the travel guidance device according to claim 1, in which guidance regarding the specific facility is restricted by the guidance restriction means (13). Third distance determination means (13) for determining whether the distance from the current position of the vehicle to the specific facility different from the specific facility is equal to or less than the first distance, and the third distance determination means from the current position of the host vehicle When it is determined that the distance to the different specific facility is equal to or less than a first predetermined distance, the guidance target change is made to guide the different specific facility as a guidance target by the guidance unit while continuing to restrict guidance of the guidance unit. And means (13) .
Further, the travel guide device (1) according to claim 3 is the travel guide device according to claim 2, wherein the different target facilities are set as guide targets by the guide means by the guide target changing means, A fourth distance determining means (13) for determining whether a distance from the current position of the own vehicle acquired by the own vehicle position acquiring means to the different specific facility is equal to or greater than the second predetermined distance; The guidance restriction release means (13) is a case where guidance concerning the different specific facility is restricted by the guidance restriction means, and a distance from the current position of the vehicle to the different specific facility by the fourth distance determination means. Is determined to be equal to or longer than the second predetermined distance, the restriction on guidance regarding the different specific facility by the guidance restriction unit is released .

According to a fourth aspect of the present invention, there is provided a facility information acquisition step (S2) for acquiring position information of a specific facility on a map stored in the map information storage medium (22), and a current position of the host vehicle. The vehicle position acquisition step (S1), and a first distance for determining whether or not the distance from the current position of the vehicle acquired by the vehicle position acquisition step to the specific facility is equal to or less than a first predetermined distance A determination step (S11) and a guidance step for providing guidance regarding the specific facility when it is determined in the first distance determination step that the distance from the current position of the vehicle to the specific facility is equal to or less than a first predetermined distance ( S13, S14), and after the guidance on the specific facility is performed in the guidance step, the specific facility related to the specific facility in the guidance step. Whether the distance from the current position of the host vehicle acquired by the host vehicle position acquisition step to the specific facility is greater than or equal to a second predetermined distance that is longer than the first predetermined distance. In the second distance determining step (S21) for determining whether or not guidance regarding the specific facility is restricted by the guidance restricting step, and the specific facility is determined from the current position of the vehicle by the second distance determining step. A guidance restriction releasing step (S25) for releasing the restriction on guidance regarding the specific facility by the guidance restriction step when it is determined that the distance to the second predetermined distance is equal to or greater than the second predetermined distance, and a display guiding step of performing guidance by the display of the audio guidance step and a display device for performing guidance by voice, the guide limiting step, before While not to perform the guidance regarding the specific facility by voice guidance step, by continuously performed in the display guide step guidance regarding the specific facility is not performed guided by the voice guidance step, the guide It is characterized by restricting step guidance.

Further, the computer program according to claim 5 includes a facility information acquisition function (S2) for acquiring position information of a specific facility on a map stored in the map information storage medium (22), and a current position of the host vehicle. A vehicle position acquisition function (S1) for acquiring the vehicle position, and a first determination whether the distance from the current position of the vehicle acquired by the vehicle position acquisition function to the specific facility is equal to or less than a first predetermined distance. 1 distance determination function (S11) and guidance that guides the specific facility when it is determined by the first distance determination function that the distance from the current position of the vehicle to the specific facility is equal to or less than a first predetermined distance Functions (S13, S14) and a guidance restriction function (S15) for restricting guidance on the specific facility by the guidance function after guidance on the specific facility is performed by the guidance function And a second distance determining function for determining whether a distance from the current position of the own vehicle acquired by the own vehicle position acquiring function to the specific facility is equal to or longer than a second predetermined distance longer than the first predetermined distance ( S21) and guidance regarding the specific facility is restricted by the guidance restriction function, and the distance from the current position of the vehicle to the specific facility is greater than or equal to a second predetermined distance by the second distance determination function. A guidance restriction canceling function (S25) for canceling the restriction on guidance regarding the specific facility by the guidance restriction function when it is determined that the guidance restriction function is executed, wherein the guidance function performs guidance by voice. and a display guiding function for guidance by displaying the audio guidance function and a display device, said guide limiting function, related to the specific facility by the voice guidance step While not to perform the inner, by continuously performed in the display guide step guidance regarding the specific facility guidance is not performed by the voice guidance step, to limit the guiding of the guiding function Features.

According to the travel guidance device according to claim 1 having the above-described configuration, even if the vehicle is traveling in the vicinity of the first predetermined distance from the specific facility, after the guidance regarding the specific facility is once performed, the guidance is performed. Therefore, the driver's concentration is not reduced by repeatedly performing unnecessary guidance.
In addition, the guidance is limited so that the guidance is not performed so that the driver is particularly likely to disturb the concentration of driving while the guidance by the display is continued. It is possible to prevent a decrease in concentration.

In addition, according to the travel guidance device of the second aspect, even when a plurality of facilities subject to restriction of guidance are arranged close to each other, the change is made between the plurality of facilities targeted for guidance. By doing so, it is possible to appropriately limit guidance.
In addition, according to the travel guidance device according to claim 3, even when a plurality of facilities that are subject to guidance restriction are arranged close to each other, a range in which guidance restriction is performed is limited to a plurality of facilities. By setting in consideration of the above, it is possible to appropriately limit guidance.

In addition, according to the travel guidance method of the fourth aspect , even if the vehicle is traveling in the vicinity of the first predetermined distance from the specific facility, the guidance is limited after the guidance for the specific facility is once performed. Therefore, the driver's concentration is not reduced by repeatedly performing unnecessary guidance.
In addition, the guidance is limited so that the guidance is not performed so that the driver is particularly likely to disturb the concentration of driving while the guidance by the display is continued. It is possible to prevent a decrease in concentration.

Furthermore, according to the computer program of the fifth aspect , even when the vehicle is traveling in the vicinity of the first predetermined distance from the specific facility, the guidance is limited after the guidance regarding the specific facility is once given. Since the computer is executed in such a manner, the driver's concentration is not reduced by repeatedly performing unnecessary guidance.
In addition, the guidance is limited so that the guidance is not performed so that the driver is particularly likely to disturb the concentration of driving while the guidance by the display is continued. It is possible to prevent a decrease in concentration.

  Hereinafter, a travel guidance device according to the present invention will be described in detail with reference to the drawings based on an embodiment embodied in a navigation device. First, a schematic configuration of the navigation device 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing a navigation device 1 according to this embodiment.

  As shown in FIG. 1, the navigation apparatus 1 according to the present embodiment includes a current position detection unit (own vehicle position acquisition means) 11 that detects the current position of the own vehicle, and a data recording unit 12 in which various data are recorded. The navigation ECU (facility information acquisition means, first distance determination means, guidance restriction means, second distance determination means, guidance restriction release means) 13 that performs various arithmetic processes based on the input information, and the operator An operation unit 14 that accepts the operation, a display (guidance means) 15 that displays a map around the own vehicle, guidance for the school zone, etc. to the operator, voice guidance for route guidance, guidance for the school zone, and the like are output. Information center such as a speaker (guidance means) 16, a DVD drive 17 for reading a DVD as a storage medium storing a program, a traffic information center, etc. A communication device 18 for communicating with, and a. The navigation ECU 13 is connected to a vehicle speed sensor 19 that detects the traveling speed of the vehicle.

Below, each component which comprises the navigation apparatus 1 is demonstrated in order.
The current position detection unit 11 includes a GPS 31, a geomagnetic sensor 32, a distance sensor 33, a steering sensor 34, a gyro sensor 35 as an azimuth detection unit, an altimeter (not shown), and the like. It is possible to detect.

  The data recording unit 12 reads an external storage device and a hard disk (not shown) as a recording medium, a map information DB (map information storage means) 22 recorded on the hard disk, a predetermined program, etc. And a recording head (not shown) which is a driver for writing the data.

  Here, the map information DB 22 stores various map data necessary for route guidance, traffic information guidance, and map display. Specifically, facility data 24 regarding facilities such as schools, link data 25 regarding road (link) shapes, node data 26 regarding node points, intersection data regarding each intersection, search data for searching for a route, facility data regarding facilities The image data includes image data such as search data for searching for points, maps, roads, traffic information, and the like on the display 15. Then, the navigation ECU 13 uses the current position of the own vehicle detected by the current position detection unit 11 and the map data stored in the map information DB 22 to match the current position of the own vehicle with a road on the map. I do.

Further, in the navigation device 1 according to the present embodiment, an area within a predetermined radius distance centered on a school (hereinafter referred to as a school zone) among the facilities stored in the facility data 24 is defined as a school zone. Furthermore, there are two types of school zones: an entrance school zone and an exit school zone. Here, FIG. 2 is a schematic diagram showing a school zone according to the present embodiment.
FIG. 2 shows, for example, an entrance school zone 52 and an exit school zone 53 defined for the school 51. The entrance school zone 52 is a zone for determining whether or not the vehicle has entered the school zone when the vehicle is located outside the school zone, and has a radius of 500 m (first predetermined distance) centered on the school 51. ) Area within. On the other hand, the exit school zone 53 is a zone for determining whether or not the vehicle has exited from the school zone when the vehicle is located within the school zone. Area within 2 predetermined distances).

  On the other hand, the navigation ECU (Electronic Control Unit) 13 performs a guidance route setting process for setting a guidance route from the current position to the destination when the destination is selected, and sets the current position of the vehicle to the road on the map. The electronic control unit performs overall control of the navigation device 1 such as map matching processing for matching and school zone guidance processing for guiding the school zone when the vehicle is located in the school zone. The CPU 41 as an arithmetic device and a control device, the RAM 41 that is used as a working memory when the CPU 41 performs various arithmetic processes, stores route data and the like when a route is searched, and a control program In addition, a ROM 43 in which a school zone guidance processing program (see FIGS. 3 to 5) and the like are recorded, and an internal storage device such as a flash memory 44 in which a program read from the ROM 43 is recorded are provided.

  The operation unit 14 is operated when inputting a departure point as a guidance start point and a destination point as a guidance end point, and includes a plurality of operation switches (not shown) such as various keys and buttons. Then, the navigation ECU 13 performs control to execute various corresponding operations based on switch signals output by pressing the switches. The touch panel provided on the front surface of the display 15 can be used.

  The display 15 includes a map image including a road, traffic information, operation guidance, operation menu, key guidance, a guide route from the current position to the destination, guide information along the guide route, news, weather forecast, time Mail, TV programs, etc. are displayed. Further, when the vehicle enters the school zone, a mark or a guidance sentence for guiding the vehicle to be located in the school zone is displayed until the vehicle leaves the school zone.

  The speaker 16 outputs voice guidance for guiding traveling along the guidance route and traffic information guidance based on instructions from the navigation ECU 13. Also, when the vehicle enters the school zone, it outputs a voice that indicates that it has entered the school zone.

  The DVD drive 17 is a drive that can read data recorded on a recording medium such as a DVD or a CD. The map information DB 22 is updated based on the read data.

  Further, the communication device 18 is a traffic composed of various information such as traffic jam information, regulation information, parking lot information, traffic accident information, etc. transmitted from a traffic information center, for example, a VICS (registered trademark: Vehicle Information and Communication System) center. It is a beacon receiver that receives information as a radio beacon, an optical beacon, or the like via a radio beacon device, an optical beacon device, or the like disposed along a road.

  On the other hand, the vehicle speed sensor 19 generates a vehicle speed pulse in accordance with the rotation of the vehicle wheel, and is used to detect the moving distance and the vehicle speed of the vehicle.

  Next, a school zone guidance processing program executed by the navigation ECU 13 in the navigation device 1 having the above-described configuration will be described with reference to FIGS. FIG. 3 is a flowchart of the school zone guidance processing program according to this embodiment. Here, the school zone guidance processing program is a program that is executed at a predetermined interval (for example, every 200 ms) after the ignition of the vehicle is turned on, and guides the school zone to the vehicle that has entered the school zone. The programs shown in the flowcharts of FIGS. 3 to 5 below are stored in the RAM 42 and the ROM 43 provided in the navigation device 1 and are executed by the CPU 41.

  First, in the school zone guidance processing program, in step (hereinafter abbreviated as S) 1, the CPU 41 detects the current position (position coordinates) of the own vehicle by the current position detector 11.

  Next, in S <b> 2, the CPU 41 reads data (specifically, school position coordinates) related to all schools located around the host vehicle (for example, within 3 km around) from the map information DB 22. Note that S2 corresponds to the processing of the facility information acquisition unit.

  Subsequently, in S3, the CPU 41 calculates the distance from the own vehicle to each school around the own vehicle based on the current position of the own vehicle detected in S1 and the position coordinates of each school acquired in S2. .

Thereafter, in S4, the CPU 41 determines whether or not the vehicle state is “outside school zone”. Here, in the navigation device 1 according to the present embodiment, when the vehicle state is “within the school zone”, the same content guidance that is also present in the conventional problem (see FIG. 10) is repeatedly performed. In order to prevent this, we will restrict guidance on school zones. Therefore, in S4, this corresponds to determining whether or not the “guidance restriction flag” indicating that the school zone guidance is restricted is OFF.
Here, the vehicle state is set by S15 and S25 described later. Specifically, when the vehicle enters the school zone for entry into any school from outside the school zone (the distance from the vehicle to the school is within 500m) and the school zone is guided Is set that the vehicle state is “within the school zone” (the “guidance restriction flag” is ON) (S15). In addition, if your vehicle leaves the school zone that is being guided out of the school zone (the distance from your vehicle to the school being guided is 800 m or more) The state is set to be “outside school zone” (“guidance restriction flag” is turned OFF) (S25).

  When it is determined that the vehicle state is “outside school zone” where no guidance restriction is performed (S4: YES), an entry determination and guidance process (FIG. 4) described later is performed. On the other hand, when it is determined that the vehicle state is “within the school zone” where guidance restriction is performed (S4: NO), an exit determination and guidance process (FIG. 5) described later is performed.

  Next, the approach determination and guidance processing executed by the navigation ECU 13 in S5 will be described with reference to FIG. FIG. 4 is a flowchart of the approach determination and guidance processing program according to the present embodiment.

  First, in the entry determination and guidance processing program, in S11, the CPU 41 refers to the distance from the own vehicle calculated in S3 to each school around the own vehicle, and the distance from the own vehicle to the nearest school is 500 m. It is determined whether it is within the range.

  As a result, if it is determined that the distance from the vehicle to the nearest school is within 500 m (S11: YES), the vehicle has entered the school zone for entry from outside the school zone. The determination is made and the process proceeds to S12. On the other hand, if it is determined that the distance from the vehicle to the nearest school is longer than 500 m (S11: NO), it is determined that the vehicle is continuously located outside the school zone, and the process proceeds to S16. To do. Note that S11 corresponds to the processing of the first distance determination means.

  In S12, the CPU 41 selects the school closest to the vehicle as a school zone guidance target.

  Subsequently, in S <b> 13, the CPU 41 outputs a guidance voice for guiding that the own vehicle has newly entered the school zone from the speaker 16. For example, “You are currently driving in the school zone. Please be careful about jumping out of child. ] Etc.

  In S <b> 14, the CPU 41 displays on the display 15 a guidance screen made up of character strings and marks indicating that the vehicle is located in the school zone. Examples of character strings and marks to be displayed include a character string “running school zone” and a child's figure.

  In S15, the CPU 41 determines that the vehicle is in the school zone beyond the entrance school zone and has already provided guidance for the school zone, and changes the vehicle state to “in school zone”. Set (“Guidance limit flag” ON). Note that S15 corresponds to the processing of the guidance restriction unit.

  On the other hand, if it is determined in the determination process of S11 that the distance to the nearest school from the vehicle is longer than 500 m, it is determined that the vehicle is continuously located outside the school zone. No guidance screen display or voice guidance is performed on the zone (S16), and the CPU 41 continues to set the vehicle state to “outside school zone” (continues the “guidance restriction flag” OFF) (S17). .

  Next, the exit determination and guidance process executed by the navigation ECU 13 in S6 will be described with reference to FIG. FIG. 5 is a flowchart of the exit determination and guidance processing program according to the present embodiment.

  First, in the exit determination and guidance processing program, in S21, the CPU 41 refers to the distance from the host vehicle to each school around the host vehicle calculated in S3, and is selected as a school zone guidance target from the host vehicle in S12. It is determined whether the distance to the school is 800 m or more.

  As a result, when it is determined that the distance from the subject vehicle to the guidance target school is less than 800 m (S21: NO), it is determined that the subject vehicle is continuously located in the school zone of the guidance target subject. Then, the process proceeds to S22. On the other hand, when it is determined that the distance from the own vehicle to the guidance target school is 800 m or more (S21: YES), it is determined that the own vehicle has left the school zone for exiting the current guidance target school. The process proceeds to S24. Note that S21 corresponds to the processing of the second distance determination means.

  In S22, the CPU 41 determines that the vehicle continues to be located within the school zone of the school to be guided, and thus continues without deleting the display of the guidance screen (character string or mark) for guiding the school zone. To display. Further, the vehicle state is continuously set to “within the school zone” (the “guidance restriction flag” is kept ON) (S23).

  On the other hand, in S24, the CPU 41 deletes from the display 15 a guidance screen indicating that the vehicle is located in the school zone in order to guide that the vehicle has left the school zone.

  In S25, the CPU 41 determines that the host vehicle is located outside the school zone beyond the exit school zone, and sets the host vehicle state to “outside school zone” in order to cancel the guidance restriction (“ Turn off the guidance restriction flag ". Note that S25 corresponds to the processing of the guidance restriction release unit.

Next, a specific example of school zone guidance by the school zone guidance processing program will be described with reference to FIGS.
As shown in FIG. 6, when the vehicle 54 is located outside the school zone (that is, the “guidance restriction flag” is OFF), and then enters the school zone 52 for entering the school 51 for the first time. At the point G that has entered, the display 15 starts displaying a guidance image for guiding the user to be in the school zone, and further, a guidance voice for guiding that the speaker 16 has entered the school zone is output. Further, the “guidance restriction flag” is turned on to restrict the guidance of the school zone thereafter.

  Then, as shown in FIG. 7, once the own vehicle 54 enters the school zone 52 for entering the school 51, the sound relating to the school zone is obtained as long as it does not cross the boundary of the exiting school zone 53 larger than the school zone 52 for entering. Guidance is limited so that guidance is not performed. Therefore, even when the vehicle 54 travels near the boundary of the entrance school zone 52, no guidance voice is output. Moreover, since the display of the guidance image for guiding the user to be in the school zone on the display 15 is continuously performed, the display and non-display of the guidance image are not repeated.

Thereafter, as shown in FIG. 8, when the school zone guidance has already been performed (that is, the “guidance restriction flag” is ON) and the school 51 exits the school zone 53, the user exits. At the point H, the display of the guidance image is erased in order to guide that the vehicle 54 is located outside the school zone on the display 15. After that, the “guidance restriction flag” is turned OFF in order to cancel the restriction of the school zone guidance.
As described above, by restricting guidance regarding school zones based on the positional relationship between the school and the vehicle, voice guidance regarding the same school zone is not repeatedly performed.

  Next, a case where a plurality of schools are located close to each other and a plurality of school zones partially overlap will be described with reference to FIG. In the case where a plurality of school zones overlap, for example, as shown in FIG. 9, even if the own vehicle 54 exits from the exit school zone 53 of the school 51 at the H point, There are cases where it is located within the school zone 62. Therefore, although the own vehicle 54 continues to be located in the school zone, unnecessary school zone voice guidance is performed at the H point.

  Therefore, guidance regarding school zones is restricted as follows. First, when it is determined in S21 that the distance from the own vehicle to the school to be guided is within 800 m (S21: YES), whether or not the distance from the own vehicle to the nearest school is within 500 m. To determine.

  As a result, if it is determined that the distance from the vehicle to the nearest school is within 500 m, a plurality of school zones are overlapped as shown in FIG. It is determined that the target school (School 51 in FIG. 9) has exited the exit school zone and that it has newly entered the entrance school zone of another school (School 61 in FIG. 9). The school closest to the distance is newly switched to the school zone guidance target. Thereafter, the process proceeds to S22.

  On the other hand, if it is determined that the distance from the vehicle to the nearest school is longer than 500 m, the vehicle has moved out of the school zone for exiting the school currently being guided and any school Is determined not to be located in the school zone, and the process proceeds to S24.

  By configuring as described above, even if the vehicle 54 shown in FIG. 9 exits from the school zone 53 for exiting the school 51 at the H point, the school to be guided in the school zone is moved from the school 51 to the school. However, the guidance can be limited so that a new guidance voice is not output from the speaker 16.

As described in detail above, in the navigation device 1 according to the present embodiment, the travel guidance method by the navigation device 1 and the computer program executed by the navigation device 1, the school zone for entry is used as the school zone that defines the school peripheral area. And the exit school zone wider than the entrance school zone are set, and the vehicle enters the school zone for entrance of any school (S11: YES), and after providing guidance on the school zone (S13) Restricts guidance for the school zone until the vehicle exits the school zone for exiting the school to be guided (S15), so near the boundary of the school zone (for example, 500m away from the school) Even if you were driving nearby) Since that after the guide has been performed performing restriction of the guide, it does not lower the concentration of the driver by repeating unnecessary guidance.
In addition, since guidance is restricted so as not to perform voice guidance that is particularly likely to hinder driving concentration for the driver, frequent voice guidance prevents the driver's concentration from being lowered. .

Note that the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the scope of the present invention.
For example, in this embodiment, a radius of less than 500m centered on the school is set as the entrance school zone, and a radius of less than 800m centered on the school is set as the exit school zone. As long as the school zone is wide, the numerical value may be changed. Further, the numerical value may be changed by a driver's operation.

  Also, in this embodiment, after the vehicle approaches the school within 500m and guidance on the school zone of the school is given, the school will continue until the vehicle exits the school zone for exit from the school. Guidance is restricted so that voice guidance regarding the zone is not performed, but guidance may be restricted by lowering the volume of the guidance voice. Further, guidance may be limited by simplifying the guidance content.

  Also, in this embodiment, when a vehicle enters the school zone for entry, voice guidance that the vehicle is located in the school zone is provided, but the school name, school location, etc. You may make it guide also the information regarding.

  Moreover, although this embodiment demonstrated the case where the guidance of the school zone which prescribed | regulated the surrounding area of a school was demonstrated, this invention is applicable also when guiding the surrounding area of other facilities (for example, a hospital or a fire department). is there.

It is a block diagram of the navigation device concerning this embodiment. It is the schematic diagram which showed the school zone which concerns on this embodiment. It is a flowchart of the school zone guidance processing program which concerns on this embodiment. It is a flowchart of the approach determination and guidance processing program which concerns on this embodiment. It is a flowchart of the exit determination and guidance processing program which concerns on this embodiment. It is the schematic diagram which showed the stage which the own vehicle entered the school zone for approach. It is the schematic diagram which showed the stage in which the guidance regarding a school zone is restrict | limited after the own vehicle approached the school zone for an entrance. It is the schematic diagram which showed the stage in which the own vehicle withdraws from the school zone for exit and the restriction | limiting of the guidance regarding a school zone is cancelled | released. The school zone is a diagram showing a guidance restriction mode of the school zone when overlapping. It is explanatory drawing explaining the conventional problem.

Explanation of symbols

1 Navigation device 13 Navigation ECU
15 Display 16 Speaker 22 Map information DB
23 School coordinates DB

Claims (5)

Map information storage means for storing map information relating to the map;
Facility information acquisition means for acquiring position information of a specific facility on the map;
Own vehicle position acquisition means for acquiring the current position of the own vehicle;
First distance determination means for determining whether a distance from the current position of the own vehicle acquired by the own vehicle position acquisition means to the specific facility is equal to or less than a first predetermined distance;
A travel guidance device comprising: guidance means for providing guidance regarding the specific facility when it is determined by the first distance determination means that the distance from the current position of the vehicle to the specific facility is equal to or less than a first predetermined distance; ,
Guidance restriction means for restricting guidance on the specific facility by the guidance means after guidance on the specific facility is performed by the guidance means;
Second distance determination means for determining whether the distance from the current position of the own vehicle acquired by the own vehicle position acquisition means to the specific facility is equal to or longer than a second predetermined distance longer than the first predetermined distance;
In the case where guidance regarding the specific facility is restricted by the guidance restricting means, it is determined by the second distance determining means that the distance from the current position of the vehicle to the specific facility is equal to or greater than a second predetermined distance. A guide restriction releasing means for releasing the restriction on guidance for the specific facility by the guidance restriction means,
The guidance means includes voice guidance means for performing guidance by voice and display guidance means for performing guidance by display on a display device,
The guidance restriction unit prevents the voice guidance unit from providing guidance on the specific facility, while the voice guidance unit continues to guide the specific facility on the display guidance unit. by causing, travel guidance device characterized by restricting the guidance of the guide means. A third distance determination that determines whether a distance from the current position of the vehicle to a specific facility different from the specific facility is equal to or less than a first distance when guidance on the specific facility is limited by the guidance limiting unit; Means,
When the third distance determining means determines that the distance from the current position of the host vehicle to the different specific facility is equal to or less than a first predetermined distance, the different specified The travel guidance apparatus according to claim 1, further comprising guidance target changing means for setting a facility as a guidance target by the guidance means. The distance from the current position of the host vehicle acquired by the host vehicle position acquisition unit to the different specific facility after the different target facility is set as the target of guide by the guide unit by the guide target changing unit is the second predetermined distance. Having a fourth distance determining means for determining whether or not
The guidance restriction release means is a case where guidance concerning the different specific facility is restricted by the guidance restriction means, and a distance from the current position of the vehicle to the different specific facility is determined by the fourth distance determination means. 3. The travel guidance device according to claim 2, wherein when it is determined that the distance is equal to or longer than the predetermined distance, the guidance restriction on the different specific facility by the guidance restriction unit is released. A facility information acquisition step of acquiring position information of a specific facility on a map stored in a map information storage medium;
A vehicle position acquisition step for acquiring the current position of the vehicle;
A first distance determining step for determining whether or not a distance from the current position of the own vehicle acquired by the own vehicle position acquiring step to the specific facility is equal to or less than a first predetermined distance;
A guidance step for providing guidance regarding the specific facility when it is determined in the first distance determination step that the distance from the current position of the vehicle to the specific facility is equal to or less than a first predetermined distance; ,
A guidance restriction step for restricting guidance on the specific facility by the guidance step after guidance on the specific facility is performed by the guidance step;
A second distance determining step for determining whether a distance from the current position of the own vehicle acquired by the own vehicle position acquiring step to the specific facility is equal to or longer than a second predetermined distance longer than the first predetermined distance;
In the case where guidance regarding the specific facility is restricted by the guidance restriction step, it is determined by the second distance determination step that the distance from the current position of the vehicle to the specific facility is equal to or greater than a second predetermined distance. A guidance restriction release step for releasing the restriction on guidance regarding the specific facility by the guidance restriction step.
The guidance step includes a voice guidance step for performing guidance by voice and a display guidance step for performing guidance by display on a display device,
In the guidance restriction step, guidance regarding the specific facility is not performed in the voice guidance step, while guidance regarding the specific facility in which guidance is not performed in the voice guidance step is continued in the display guidance step. by causing, travel guidance method characterized by limiting the guiding of the guiding step. On the computer ,
A facility information acquisition function for acquiring location information of a specific facility on a map stored in a map information storage medium;
The vehicle position acquisition function that acquires the current position of the vehicle,
A first distance determination function for determining whether a distance from the current position of the own vehicle acquired by the own vehicle position acquisition function to the specific facility is equal to or less than a first predetermined distance;
A guidance function for providing guidance regarding the specific facility when it is determined by the first distance determination function that the distance from the current position of the vehicle to the specific facility is equal to or less than a first predetermined distance;
A guidance restriction function for restricting guidance on the specific facility by the guidance function after guidance on the specific facility is performed by the guidance function;
A second distance determination function for determining whether a distance from the current position of the host vehicle acquired by the host vehicle position acquisition function to the specific facility is equal to or greater than a second predetermined distance longer than the first predetermined distance;
The guidance restriction function restricts guidance related to the specific facility, and the second distance determination function determines that the distance from the current position of the vehicle to the specific facility is equal to or greater than a second predetermined distance. A guidance restriction release function for releasing guidance restriction on the specific facility by the guidance restriction function, and executing a computer program,
The guidance function includes a voice guidance function for performing guidance by voice and a display guidance function for performing guidance by display on a display device,
While the guidance restriction function prevents guidance related to the specific facility by the voice guidance function, guidance regarding the specific facility that is not guided by the voice guidance function continues in the display guidance function. by causing the computer program characterized by limiting the guiding of the guiding function.

Images