JP2009257830A - In-vehicle navigation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-vehicle navigation apparatus for easily and rapidly determining whether a vehicle can travel on a route including a narrow street, quickly selecting the route on which the vehicle can surely reach a destination, causing the vehicle to stably travel even if the vehicle travels on the route including the narrow street, and improving driving safety. <P>SOLUTION: If the route to the destination searched by a route searching means 20 includes the narrow street, actual image displaying/processing means 16, 14 display an actual image of the narrow street, and can determine whether the vehicle can pass through the narrow street before the vehicle reaches an actual place. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an on-vehicle navigation device, and more particularly to an on-vehicle navigation device suitable for guiding a host vehicle to a destination.

  Conventionally, in an in-vehicle navigation device, a route guidance (route) that searches a route to a destination using map data according to a predetermined route search condition and guides the vehicle to the destination along the searched route. Guidance).

  In this type of in-vehicle navigation device, a map around the vehicle position is also displayed on the display using map data, and the map around the vehicle position is used for route guidance. In addition, by superimposing and displaying the searched route together with a mark indicating the own vehicle position, it is possible to make the user know that the own vehicle is tracking the route to the destination.

  Furthermore, in recent years, a technique has been proposed that makes it possible to accurately grasp the situation around the vehicle position by displaying an aerial photograph around the vehicle position on a display (for example, Patent Documents). 1).

JP 2004-28661 A JP 2004-53351 A

  By the way, there are various types of roads in map data, such as narrow streets as well as roads that contain sufficient traffic regulation information (for example, one-way streets) such as main trunk lines and general roads. Some roads do not contain any traffic control information. A narrow street is often defined as a road having a road width of 3.3 m or more and less than 5.5 m.

  When searching for a route to the destination, a route including a narrow street is often searched depending on route search conditions, a search area, and the like.

  However, when a route including such a narrow street is searched for, it is unknown whether the user can pass through the narrow street unless the user actually reaches the narrow street. There has been a problem that it is difficult to make a quick decision as to whether or not to travel on a route including the.

  Furthermore, when the user actually travels to a destination along a route including such a narrow street, the user may perform driving operation with anxiety because it is unknown whether the narrow street is allowed to pass. There was a problem of being forced.

  Therefore, the present invention has been made in view of such problems, and can easily and quickly determine whether or not to travel on a route including a narrow street, and thus reach the destination with certainty. A vehicle that can quickly select a route that can be used, and can travel with peace of mind even when traveling on a route that includes narrow streets, which in turn can improve driving safety. An object of the present invention is to provide a navigation device for a vehicle.

  In order to achieve the above-described object, the vehicle-mounted navigation device according to the present invention is a vehicle-mounted navigation device that performs route guidance for guiding the host vehicle to the destination along a route to the destination. Destination setting means for setting the vehicle, route search means for searching for the route to the destination set by the destination setting means, vehicle position detection means for detecting the vehicle position, and vehicle position detection A route guidance unit for guiding the route along the route searched by the route search unit while grasping the vehicle position detected by the unit, and a narrow street in the route searched by the route search unit. A live-action image display processing means capable of displaying a live-action image of the narrow street when it is included on the display unit before starting the travel of the route including the narrow-street, The navigation apparatus main body uses the route including the narrow street searched by the route searching means as the route guidance target when the real shot image of the narrow street is displayed by the real image display processing means. A first operation for setting or a second operation for searching for the route detouring the narrow street is selectively allowed, and the route guiding means is configured to perform the first operation When performed, the route guidance along the route including the narrow street is formed so as to be performed at least in a section other than the narrow street in the route, and the route search means includes the second When the above operation is performed, the route is searched for the route that bypasses the narrow street.

  According to such a configuration, when a narrow street is included in the route searched by the route search, a live-action image of the narrow street is displayed to determine whether or not the narrow street is allowed to pass. Since it can be performed in advance, it is possible to easily and quickly determine whether or not to travel on a route including a narrow street.

  In addition, since it is possible to select route guidance along the route including the narrow street after determining whether or not the narrow street is allowed to pass based on the actual image of the narrow street, the route including the narrow street You can drive with confidence.

  Furthermore, even when it is determined that the narrow street cannot be passed on the basis of the live-action image of the narrow street, it is possible to quickly shift to searching for a route that bypasses the narrow street.

  Further, the live-action image display processing means displays the live-action image of the narrow street on the display unit even when the own vehicle reaches the narrow street based on the detection result of the own vehicle position detection means. The in-vehicle navigation device body is formed at the own vehicle position on the live-action image of the narrow street displayed by the live-action image display processing means when the own vehicle reaches the narrow street. It is preferable that the vehicle includes an own vehicle image display processing unit that displays an image having a size capable of determining a ratio of the actual size of the own vehicle to the narrow street as the image showing the own vehicle.

  According to such a configuration, when the own vehicle reaches the narrow street, an image showing the own vehicle is displayed at the own vehicle position on the live-action image of the narrow street, and the actual size of the own vehicle with respect to the narrow street. Since the ratio can be displayed as a discriminable state, it is possible to more reliably determine whether or not the narrow street is allowed to pass.

  Further, the display unit includes a map display processing unit for displaying a map around the vehicle position on the display unit, and the live-action image display processing unit displays a live-action image of the narrow street when the host vehicle reaches the narrow street. Is preferably performed by automatic switching from the display of the map by the map display processing means.

  And according to such a configuration, in the section until the vehicle on the route including the narrow street reaches the narrow street, the map around the vehicle position is displayed, and after reaching the narrow street, Since the display can be switched to a live-action image of a narrow street, a live-action image with a larger amount of data than the map can be displayed only when necessary, and the processing burden of the in-vehicle navigation device can be reduced. it can.

  Furthermore, when the live-action image display processing means displays the live-action image of the narrow street, the scale of the live-action image of the narrow street is regarded as being capable of determining whether or not the narrow-street is allowed to pass by the own vehicle. It is preferable that the predetermined scale is automatically set.

  According to such a configuration, the scale of the live-action image of the narrow street can be automatically set to a predetermined scale that can be determined whether or not the narrow street can be passed. It is possible to easily perform the determination of whether or not it is possible without requiring a complicated operation.

  In addition, it is preferable to include a right / left difficult point display processing means for displaying an image for identifying the point at a point where it is considered difficult to turn right or left on the narrow street on the live-action image of the narrow street.

  And according to such a configuration, it is possible to grasp a point where it is difficult to make a right or left turn on a narrow street. Alternatively, it can enhance safety by encouraging careful driving at that point.

  Furthermore, the actual image of the narrow street may be an aerial photograph or a satellite photograph.

  According to such a configuration, it is possible to easily and quickly determine whether or not to travel on a route including a narrow street based on an aerial photograph or a satellite photograph.

  According to the present invention, it is possible to easily and quickly determine whether or not to travel on a route including a narrow street, and as a result, it is possible to quickly select a route that can surely reach the destination, In addition, even when traveling on a route including a narrow street, it is possible to travel with peace of mind, and as a result, it is possible to improve driving safety.

  Hereinafter, an embodiment of an in-vehicle navigation device according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the in-vehicle navigation device 1 in this embodiment is roughly divided into a navigation main unit 2, a data reading device 3, an input operation unit 5, and a GPS receiver 6 connected to the navigation main unit 2, respectively. The autonomous navigation sensor 7, the display 8, and the speaker 9 are included.

  The input operation unit 5 may be a remote controller, a touch panel of the display 8, a rotary encoder, a linear encoder, a microphone for performing voice input, or the like.

  The autonomous navigation sensor 7 may be composed of a gyro sensor, a vehicle speed sensor (vehicle speed pulse), and the like.

  The data reading device 3 is equipped with a storage medium 11 such as a hard disk, and this storage medium 11 stores various data for executing functions of the in-vehicle navigation device 1 such as map data. . Map data is used to execute road data and background data used to execute the map display function and route guidance function, route calculation data used to execute the route search function, and search functions such as destinations and facilities. Search data. The road data may be composed of entities (basic data elements) such as shape interpolation points, segments, links, nodes, link strings, road names, traffic conditions, and traffic signs. The background data may be configured by entities such as points, polylines, polygons, text, shape positions, and shape types. Furthermore, the route calculation data may be configured by entities such as nodes, links, and traffic conditions. Furthermore, the search data may be configured by area name, address, postal code, intersection name, POI (Points Of Interest), service (store, facility), and the like.

  The navigation main unit 2 will be described in detail. The navigation main unit 2 has an operation screen drawing unit 12. The operation screen drawing unit 12 generates drawing data of various operation screens that can be input by the user using the input operation unit 5 such as a menu screen or a destination setting operation screen, and the generated operation screen. The drawing data is output.

  A display processing unit 14 is connected to the output side of the operation screen drawing unit 12, and drawing data of the operation screen output from the operation screen drawing unit 12 is input to the display processing unit 14. ing. The display processing unit 14 displays an operation screen corresponding to the drawing data of the operation screen input from the operation screen drawing unit 12 side on the display 8.

  The navigation main unit 2 has a host vehicle position calculation unit 15 as a host vehicle position detection means. On the input side of the host vehicle position calculation unit 15, a GPS receiver 6 and an autonomous navigation sensor 7 are respectively provided. It is connected.

  The GPS receiver 6 outputs information including a trajectory and time received from a GPS satellite (not shown) to the vehicle position calculation unit 15. And the own vehicle position calculation part 15 calculates (detects) the own vehicle position as an absolute coordinate based on the information output from the GPS receiver 6 (satellite navigation).

  The autonomous navigation sensor 7 detects an angular velocity, a vehicle speed, and the like of the host vehicle, and outputs a detection result to the host vehicle position calculation unit 15. The own vehicle position calculation unit 15 calculates (detects) the own vehicle position as a relative change from the previous own vehicle position based on the detection result output from the autonomous navigation sensor 7. (Autonomous navigation).

  A data read control unit 16 is connected to the output side of the vehicle position calculation unit 15, and the data read device 3 described above is connected to the output side of the data read control unit 16.

  The own vehicle position calculation unit 15 outputs the calculation result of the own vehicle position by satellite navigation or autonomous navigation to the data read control unit 16, and the data read control unit 16 displays the own vehicle indicated by the calculation result. A request for reading map data in a predetermined area including the position is output to the data reading device 3.

  The data reading device 3 reads map data corresponding to the reading request from the storage medium 11.

  A buffer 18 is connected between the data reading device 3 and the vehicle position calculation unit 15, and map data read from the data reading device 3 is temporarily stored in the buffer 18. It has become. The map data stored in the buffer 18 is acquired by the vehicle position calculation unit 15.

  If the vehicle position calculated by satellite navigation or autonomous navigation is not on the road in the map data acquired via the buffer 18, the vehicle position calculation unit 15 calculates the position on the corresponding road in the map data. A map matching process for correcting the position of the vehicle is performed on the position, and the vehicle position after the map matching process is set as a final calculation result.

  A map drawing unit 17 is connected to the display processing unit 14, the vehicle position calculation unit 15, the data read control unit 16, and the buffer 18. The map drawing unit 17 serves as a map display processing unit together with the display processing unit 14. It is configured.

  That is, the calculation result of the vehicle position by the vehicle position calculation unit 15 is input to the map drawing unit 17.

  Based on the input calculation result of the vehicle position, the map drawing unit 17 sends a read request to the data reading device 3 to read map data of a predetermined area including the vehicle position. In contrast, the output is made.

  Further, the map drawing unit 17 acquires the map data read from the storage medium 11 by the data reading device 3 in response to the read request through the buffer 18, and uses the acquired map data to Map drawing data around the vehicle position is generated, and the generated map drawing data around the vehicle position is output to the display processing unit 14.

  The display processing unit 14 displays a map around the vehicle position corresponding to the map drawing data output from the map drawing unit 17 on the display 8.

  A host vehicle position drawing unit 21 is connected between the host vehicle position calculating unit 15 and the display processing unit 14, and the calculation result of the host vehicle position calculating unit 15 is input to the host vehicle position drawing unit 21. It has come to be.

  The own vehicle position drawing unit 21 generates drawing data of the own vehicle position mark indicating the own vehicle position based on the calculation result of the own vehicle position calculating unit 15, and displays the generated drawing data of the own vehicle position mark. The data is output to the processing unit 14.

  Then, the display processing unit 14 superimposes and displays the vehicle position mark corresponding to the drawing data of the vehicle position mark output from the vehicle position drawing unit 21 on the vehicle position on the map displayed on the display 8. It is like that.

  A destination setting unit 19 as destination setting means is connected to the output side of the input operation unit 5, and the destination setting unit 19 is connected to the destination setting operation screen from the input operation unit 5. The result of a user input operation for setting the destination is input. The destination setting unit 19 sets a destination according to the result of the input operation on the destination setting operation screen.

  A route search unit 20 as route search means is connected to the operation screen drawing unit 12, the vehicle position calculation unit 15, the data read control unit 16, the buffer 18, and the destination setting unit 19, and the route search unit 20 Is configured to perform route calculation for searching for a route from the vehicle position calculated by the vehicle position calculation unit 15 to the destination set by the destination setting unit 19.

  At the time of this route calculation, the route search unit 20 causes the data read control unit 16 to output a read request for reading the route calculation data in the map data stored in the storage medium 11 to the data reading device 3. The route calculation data read in response to the read request is used to calculate a route to the destination that satisfies the route search condition set in the route search unit 20.

  The route search conditions include a search condition for searching for a recommended route from the vehicle position to the destination, and a search for searching for a route that uses a general road preferentially (hereinafter referred to as a general priority route). Search conditions for searching for a route that uses a toll road preferentially (hereinafter referred to as a toll priority route), search for a route that requires the shortest distance to the destination (hereinafter referred to as a distance priority route) And various search conditions such as a search condition for searching for a route different from the currently guided route (hereinafter referred to as another route).

  The route search conditions are not limited to those set in the route search unit 20 by default, and may be set by the user by operating the input operation unit 5.

  A search result drawing unit 22 is connected to the route search unit 20 and the display processing unit 14, and a search result of the route search unit 20 is input to the search result drawing unit 22. The search result drawing unit 22 generates drawing data for displaying the input search result in a selectable state as a route guidance target, and outputs the generated drawing data to the display processing unit 14. Yes. The display processing unit 14 displays the search result corresponding to the drawing data of the search result on the display 8.

  A guide image drawing unit 24 is connected to the input operation unit 5, the display processing unit 14, the vehicle position calculation unit 15, the buffer 18, and the route search unit 20, and the guide image drawing unit 24 is connected to the display processing unit 14. In addition, a route guidance means is configured.

  That is, when the input operation unit 5 performs an input operation for starting route guidance along the route searched for by the route search unit 20, the guidance image drawing unit 24 and the search result of the route search unit 20 and Based on the calculation result of the vehicle position calculation unit 15, drawing data of a guide image such as an enlarged intersection image is generated, and the generated drawing data of the guide image is output to the display processing unit 14. The guide image drawing unit 24 acquires the map data read from the storage medium 11 through the buffer 18 as necessary, and uses the acquired map data for generating the drawing data of the guide image. It has become.

  The display processing unit 14 displays a guide image corresponding to the drawing data output from the guide image drawing unit 24 on the display 8.

  In this way, the guidance image drawing unit 24 and the display processing unit 14 perform route guidance using the guidance image while grasping the vehicle position.

  The input operation unit 5, the speaker 9, the vehicle position calculation unit 15, and the route search unit 20 are connected to a voice guidance unit 25 as route guidance means. When the input operation unit 5 performs an input operation for starting route guidance along the route searched by the route search unit 20, the voice guidance unit 25 displays the search result of the route search unit 20 and the own vehicle. Based on the calculation result of the position calculation unit 15, guidance voice data for performing voice guidance such as intersection right / left turn guidance is generated, and the generated guidance voice data is output to the speaker 9. The speaker 9 outputs voice data generated by the voice guide unit 25 by voice.

  In this way, the route guidance using the guidance voice is performed by the voice guidance unit 25 while grasping the vehicle position.

  Such route guidance using the guidance image and the guidance voice may be started by an instruction by voice input.

  In the present embodiment, the storage medium 11 stores actual image data (hereinafter referred to as actual image data), which is an image of the ground surface taken from above, with coordinates (latitude, longitude) between the map data and the map data. Is stored as a state having the corresponding relationship. The photographed image may be an aerial photograph or a satellite photograph, for example.

  In the present embodiment, the display processing unit 14, the data read control unit 16, the buffer 18, and the route search unit 20 are connected to a real image drawing unit 26 that constitutes a real image display processing unit. A search result of the route search unit 20 is input to the drawing unit 26.

  Then, the live-action image drawing unit 26 determines whether or not a narrow street is included in the route searched by the route search unit 20 based on the input search result.

  If the result of this determination is that a narrow street (hereinafter referred to as an intra-route narrow street) is included in the route searched by the route search unit 20, the live-action image drawing unit 26 A data read device 3 is made to output a read request for reading out real image data of a predetermined area including the narrow street in the route stored in the storage medium 11.

  The photographed image data read from the storage medium 11 in response to the read request is acquired by the photographed image drawing unit 26 after passing through the buffer 18.

  Then, the live-action image drawing unit 26 uses the acquired live-action image data as a real-action image of the narrow street in the route as a live-action image of the narrow street in the route (hereinafter, referred to as a real image in the route). The drawing data of the narrow street periphery live-action image is generated, and the generated drawing data of the narrow street periphery live-action image is output to the display processing unit 14.

  The display processing unit 14 constitutes a live-action image display processing means together with the live-action image drawing unit 26, and displays on the display 8 the narrow-street peripheral live-action image corresponding to the drawing data of the narrow-street peripheral live-action image output from the live-action image drawing unit 26. It is supposed to be displayed.

  It should be noted that such a live-action image around the narrow street is displayed at any timing as long as it is performed after the search for the route including the narrow street in the route and before the start of the route including the narrow street in the route. Depending on the concept, it can be changed variously.

  For example, the live-action image drawing unit 26 and the display processing unit 14 include the search result drawing unit 22 and the display processing unit 14 when there are a plurality of routes searched by the route search unit 20 according to the type of the route search condition. One route is selected as a route guidance target from among the search results of a plurality of routes displayed by, and it is confirmed that an intra-route narrow street exists in the selected route. You may make it display the real image around a narrow street including a street.

  Further, in the present embodiment, the in-vehicle navigation device 1 as the in-vehicle navigation device body includes the narrow street in the route searched by the route search unit 20 when the live-action image around the narrow street is displayed. The first operation for setting the route as a route guidance target or the second operation for searching for a route that bypasses the narrow street in the route is selectively allowed.

  That is, in this embodiment, the operation screen drawing unit 12 can selectively perform the first operation or the second operation when the live-action image drawing unit 26 displays the live-action image around the narrow street. Drawing data for an operation screen (hereinafter referred to as a setting / bypass selection screen) is generated, and the generated drawing data is output to the display processing unit 14 so that the setting / bypass selection screen is displayed on the display 8. ing. Accordingly, the first operation or the second operation using the input operation unit 5 on the setting / detour selection screen is allowed.

  When the first operation using the input operation unit 5 is performed on such a setting / detour selection screen, the guide image drawing unit 24 and the display processing unit 14 are operated by the input operation unit 5. Waiting for an input operation for starting the route guidance, the route guidance along the route including the narrow street in the route searched for by the route search unit 20 is performed (started) using the guide image. .

  At this time, the voice guidance unit 25 waits for an input operation for starting route guidance by the input operation unit 5, and performs route guidance along the route including the narrow street in the route searched by the route search unit 20. This is performed (started) using the guidance voice.

  Note that the guide image drawing unit 26, the display processing unit 14, and the voice guide unit 25 may perform route guidance only in a section other than the intra-route narrow street in the route including the intra-route narrow street.

  On the other hand, when the second operation using the input operation unit 5 is performed on the setting / detour selection screen, the route search unit 20 routes to a destination that bypasses the narrow street in the route. Is newly explored. In this case, the route search along the route that includes the previously searched narrow street is not performed, and the search result of the route that bypasses the newly searched narrow street is displayed. It has become. Then, route guidance along the newly searched route is started after an input operation for starting route guidance by the input operation unit 5 is started.

  According to such a configuration, when the route searched by the route search unit 20 includes a narrow street in the route, a live-action image around the narrow street is displayed to determine whether or not the narrow street is allowed to pass. Therefore, it is possible to easily and quickly determine whether or not to travel on a route including the narrow street in the route.

  In addition, it is possible to select route guidance along the route including the narrow street in the route after determining whether or not the narrow street is allowed to pass based on the live image around the narrow street. You can travel with confidence on the route that includes

  Furthermore, even when it is determined that the passage of the narrow street in the route is impossible based on the live-action image around the narrow street, it is possible to immediately shift to the search for the route that bypasses the narrow street.

  In addition to the above-described configuration, in the present embodiment, the live-action image drawing unit 26 and the display processing unit 14 are based on the calculation result of the own vehicle position calculation unit 15 while the host vehicle is receiving route guidance, and the narrow street in the route. Even when it reaches, the real image around the narrow street is displayed on the display 8.

  Further, a host vehicle image drawing unit 28 is connected to the display processing unit 14, the host vehicle position calculating unit 15, and the live-action image drawing unit 26, and the host vehicle image drawing unit 28 is connected to the host vehicle together with the display processing unit 14. The image display processing means is configured.

  That is, the own vehicle image drawing unit 28, based on the calculation result of the own vehicle position calculation unit 15, when the own vehicle has reached the narrow street in the route (hereinafter referred to as the own vehicle image). ), The drawing data of the own vehicle image having a size (image size) capable of determining the ratio of the actual size of the own vehicle to the narrow street in the route on the live image around the narrow street is generated. The drawing data of the generated vehicle image is output to the display processing unit 14. The display processing unit 14 displays the own vehicle image corresponding to the drawing data of the own vehicle image output from the own vehicle image drawing unit 28 when the own vehicle reaches the narrow street in the route. The vehicle is superimposed and displayed at the position of the vehicle on the photographed image.

  According to such a configuration, when the own vehicle reaches a narrow street, the ratio of the actual size of the own vehicle to the narrow street can be determined based on the own vehicle position on the live image around the narrow street. Therefore, it is possible to more reliably determine whether or not the narrow street is allowed to pass.

  In addition to the above-described configuration, in the present embodiment, the live-action image drawing unit 26 and the display processing unit 14 draw a map drawing to display a live-action image around the narrow street when the host vehicle reaches the narrow street in the route. This is performed by automatic switching from the display of the map around the vehicle position by the unit 17 and the display processing unit 14.

  According to such a configuration, when guiding a route along a route including the narrow street in the route, a map around the position of the vehicle is displayed in the section until the vehicle reaches the narrow street in the route. After the vehicle reaches the narrow street, the display can be switched to a live-action image around the narrow street. As a result, a live-action image having a data amount larger than that of a map can be displayed only when necessary, and the processing burden on the in-vehicle navigation device 1 can be reduced.

  In addition to the above-described configuration, for example, when the live-action image drawing unit 26 and the display processing unit 14 display the live-action image around the narrow street, the scale of the live-action image around the narrow street is set to the traffic of the narrow street in the route by the own vehicle. You may make it set automatically to the predetermined reduced scale considered that judgment of availability is possible.

  According to such a configuration, since it is possible to save the user from switching the scale of the live-action image around the narrow street by an input operation using the input operation unit 5, it is complicated to determine whether or not the narrow street in the route is allowed to pass. It can be performed easily without requiring any operation.

  However, even when such a configuration for automatically setting the scale is adopted, it is of course possible to manually set the scale of the live-action image around the narrow street by an input operation using the input operation unit 5.

  In addition to the above configuration, for example, a right / left difficult point display processing means for displaying an image for identifying the point at a point where it is considered difficult to turn right or left on the narrow street in the route on the live image around the narrow street. It is preferable to provide. As an image for identifying the point, a mark such as a point or an arrow can be given.

  According to such a configuration, it is possible to grasp a point where it is difficult to make a right or left turn on the narrow street in the route. Therefore, the presence of the point is used as a judgment material for traveling on the route including the narrow street in the route. Alternatively, safety can be enhanced by encouraging careful driving operations at the point.

  Next, the main operation of the present embodiment will be described with a more specific example.

  In the present embodiment, as shown in FIG. 2, first, in step 1 (ST1), the destination setting unit 19 displays the destination set on the display 8 by the operation screen drawing unit 12 and the display processing unit 14. The destination according to the input operation using the input operation unit 5 for the operation screen is set.

  Next, in step 2 (ST2), as the route from the vehicle position calculated by the vehicle position calculation unit 15 to the destination set in step 1 (ST1), the above-mentioned recommended route, general priority route, and pay Five routes including a priority route, a distance priority route, and another route are searched.

  Next, in step 3 (ST3), as shown in FIG. 3, the search result drawing unit 22 and the display processing unit 14 select one route from the search results of the five routes searched in step 2 (ST2). In other words, it is displayed on the display 8 as a state that can be selected as a route guidance target.

  Here, FIG. 3 shows a search result display screen 29. The search result display screen 29 shows the route name, the required time to the destination, and the required distance to the destination as the search results of the five routes. And five operation buttons 30a to 30e on which tolls to the destination are respectively shown, and route images 32 of five routes superimposed on the wide area map 33 around the vehicle position. The user can select a route corresponding to the operated operation buttons 30a to 30e as a route guidance target by operating the desired operation buttons 30a to 30e using the input operation unit 5. ing.

  In step 3 (ST3), the operation screen drawing unit 12 and the display processing unit 14 display a guidance start operation button 31 as shown in FIG. 3 on the same screen as the search result display screen 29. The user selects one of the five routes and operates the guidance start operation button 31 using the input operation unit 5 to guide the route along the route selected as the route guidance target. Can be instructed to start.

  Next, in step 4 (ST4), the live-action image drawing unit 26 determines whether or not a route guidance target (one route out of 5 routes) has been selected. Advances to step 5 (ST5), and if no selection is made, repeats the process of step 4 (ST4).

  Next, in step 5 (ST5), the live-action image drawing unit 26 determines whether or not a route narrow street is included in the route instructed to start guidance in step 4 (ST4). If a street is included, the process proceeds to step 6 (ST6). If not included, the process proceeds to step 10 (ST10).

  In step 10 (ST10), the guide image drawing unit 24, the display processing unit 14, and the voice guide unit 25 select one route selected as a route guidance target in step 3 (ST3) (that is, in-route details). The route is guided along a route that does not include a street, and the process is terminated.

  On the other hand, in step 6 (ST6), the live-action image drawing unit 26 and the display processing unit 14 display the narrow-street peripheral live-action image 35 as shown in FIG. 4 and the operation screen drawing unit 12 and the display processing unit 14. Then, the setting / bypass selection screen 36 as shown in FIG. 4 is displayed, and the process proceeds to Step 7 (ST7).

  In FIG. 4, the narrow street surrounding live-action image 35 and the setting / detour selection screen 36 are both superimposed on the search result display screen 29 shown in FIG. 3.

  In addition, the narrow street surrounding live-action image 35 in FIG. 4 is obtained by superimposing a route image 35b indicating the narrow street in the route on a position corresponding to the narrow street in the route on the live-action image 35a around the narrow street in the route. It has become. In the route image 35b in FIG. 4, the portion corresponding to the narrow street is displayed with a broken line and the portion corresponding to the section other than the narrow street is displayed with a solid line. However, other display modes may be selected. Of course.

  Further, the setting / bypass selection screen 36 in FIG. 4 includes a first operation button 36a on which characters “setting” for performing the first operation are written, and “search for a detour route” for performing the second operation. And a second operation button 36b on which the characters “” are written. In addition, the setting / detour selection screen 36 includes a text message 36c for notifying that the user is going to travel on a route including the narrow street in the route. The user can selectively operate the first operation button 36 a or the second operation button 36 b by using the input operation unit 5.

  Such a narrow street periphery live-action image 35 may be automatically set to a predetermined scale at which it is considered possible to determine whether the own vehicle can pass through the narrow street in the route. However, when the scale is large, the display area is conversely reduced, so that the input operation unit 5 can change the scale setting and scroll the live action image around the narrow street so that the narrow street in the route can be overlooked. You may make it do.

  Next, in step 7 (ST7), it is determined whether or not the setting / detour selection screen 36 has been operated by the guidance image drawing unit 24 and the voice guidance unit 25, and if operated, step 8 (ST8). If the operation is not performed, the process of step 7 (ST7) is repeated.

  Next, in step 8 (ST8), the guidance image drawing unit 24 and the voice guidance unit 25 determine whether or not the operation performed in step 7 (ST7) is the first operation, which is the first operation. In this case, the process proceeds to step 9 (ST9), and if it is not the first operation, that is, the second operation, the process proceeds to step 11 (ST11).

  In step 9 (ST9), along the route including the narrow street in the route selected as the route guidance target in step 3 (ST3) by the guide image drawing unit 24, the display processing unit 14, and the voice guide unit 25. Route guidance is performed and the process is terminated.

  On the other hand, in step 11 (ST11), the route search unit 20 newly searches for a route that does not include the narrow street in the route, and ends the process. In this case, route guidance along the newly searched route is performed after waiting for an instruction from the user, or a route that does not include such a narrow street is not searched. Will be presented with a search result to that effect.

  Next, FIG. 5 shows specific processing of step 9 (ST9) in FIG.

  In the description of the processing in step 9 (ST9), for convenience, the route that is selected as the route guidance target in step 4 (ST4) and determined to include the narrow street in the route in step 5 (ST5) It is assumed that the route starts from a road (for example, a general road) other than the narrow street in the route.

  As shown in FIG. 5, in step 9 (ST9), after starting the route guidance along the route including the narrow street in the route, first, as shown in step 9A (ST9A), the guide image drawing unit 24 is started. The map drawing unit 17 and the display processing unit 14 perform the route guidance such as the display of the enlarged intersection image and the left / right intersection guidance with the progress of the host vehicle on the route by the display processing unit 14 and the voice guidance unit 25. A map 40 around the vehicle position as shown in FIG. 6 is displayed.

  At this time, the host vehicle position drawing unit 21 and the display processing unit 14 superimpose and display the host vehicle position mark 41 on the host vehicle position on the map 40 around the host vehicle.

  Further, at this time, the search result drawing unit 22 and the display processing unit 14 superimpose and display the route image 42 of the narrow street in the route on the map 40 around the host vehicle.

  Next, in step 9B (ST9B), the live-action image drawing unit 26 determines whether the host vehicle has reached the narrow street in the route based on the calculation result of the host vehicle position calculation unit 15, and the host vehicle If the route has reached the narrow street, the process proceeds to step 9C (ST9C), and if not, the process proceeds to step 9G (ST9G).

  In step 9C (ST9C), the route guidance is stopped and the photographed image drawing unit 26 and the display processing unit 14 use the map 40 (FIG. 7 (a)) around the vehicle position as shown in FIG. The display is automatically switched to the street periphery live-action image 38 (FIG. 7B), and the process proceeds to Step 9D (ST9D).

  Here, the narrow street periphery live-action image 38 shown in FIG. 7B is displayed on a sufficiently large scale so that it is possible to determine whether or not the narrow street within the route is allowed to pass. Further, the actual size of the vehicle relative to the narrow street in the route can be determined by the own vehicle image drawing unit 28 and the display processing unit 14 at the own vehicle position on the narrow street in the route in the live image around the narrow street 38. A vehicle image 39 having a size (image size) is superimposed and displayed. Such a narrow street live-action image 38 is continuously displayed while the vehicle is traveling on the narrow street in the route.

  Next, in step 9D (ST9D), the guidance image drawing unit 24 and the voice guidance unit 25 determine whether the host vehicle has arrived at the destination based on the calculation result of the host vehicle position calculation unit 15, If the destination has been reached, the route guidance is terminated. If the destination has not been reached, the process proceeds to step 9E (ST9E).

  Next, in step 9E (ST9E), the live-action image drawing unit 26 determines whether or not the own vehicle has exited the narrow street in the route based on the calculation result of the own vehicle position calculation unit 15, and when the vehicle is removed Return to step 9A (ST9A), and if not removed, proceed to step 9F (ST9F).

  At this time, when returning from step 9E (ST9E) to step 9A (ST9A), route guidance is resumed, and display switching from the narrow street live-action image 38 to the map 40 is performed.

  On the other hand, in step 9F (ST9F), the live-action image drawing unit 26 and the display processing unit 14 continue to display the live-action image 38 around the narrow street while stopping route guidance.

  In step 9G (ST9G), the live-action image drawing unit 26 determines whether or not step 9E (ST9E) has been performed. If step 9E (ST9E) has been performed, the process proceeds to step 9D (ST9D). If not, the process returns to step 9B (ST9B).

  As described above, according to the present embodiment, it is possible to determine whether or not the narrow streets within the route are allowed to pass by displaying the live-action image around the narrow streets by the live-action image drawing unit 26 and the display processing unit 14 before going to the site. Therefore, it is possible to easily and quickly determine whether to travel on a route including the narrow street in the route.

  In addition, it is possible to select route guidance along the route including the narrow street in the route after determining whether or not the narrow street in the route is allowed to pass based on the live image around the narrow street. You can travel with confidence on the route that includes

  Furthermore, even when it is determined that the passage of the narrow street in the route is impossible based on the live-action image around the narrow street, the route search unit 20 can quickly shift to the search for the route that bypasses the narrow street. .

  In addition, this invention is not limited to embodiment mentioned above, A various change is possible as needed.

The block diagram which shows embodiment of the vehicle-mounted navigation apparatus which concerns on this invention 1st flowchart which shows embodiment of the vehicle-mounted navigation apparatus concerning this invention The figure which shows the display state of a search result display screen in embodiment of the vehicle-mounted navigation apparatus which concerns on this invention. The figure which shows the display state of a narrow street surrounding real image at the time of the destination setting in embodiment of the vehicle-mounted navigation apparatus concerning this invention 2nd flowchart which shows embodiment of the vehicle-mounted navigation apparatus which concerns on this invention The figure which shows the display state of the map around the own vehicle position in embodiment of the vehicle-mounted navigation apparatus which concerns on this invention. In the embodiment of the in-vehicle navigation device according to the present invention, switching of the display from the map around the own vehicle position shown in (a) to the live image around the narrow street shown in (b) is schematically shown. Figure

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car navigation apparatus 8 Display 14 Display processing part 15 Own vehicle position calculation part 19 Destination setting part 20 Route search part 26 Real image drawing part

Claims (6)

A vehicle-mounted navigation device that performs route guidance for guiding the host vehicle to the destination along a route to the destination,
Destination setting means for setting the destination;
Route search means for searching for a route to the destination set by the destination setting means;
Own vehicle position detecting means for detecting the own vehicle position;
Route guidance means for performing the route guidance along the route searched by the route search means while grasping the vehicle position detected by the vehicle position detection means;
When a narrow street is included in the route searched by the route search means, it is possible to display a live-action image of the narrow street on the display unit before starting the travel of the route including the narrow street. A live-action image display processing means,
The in-vehicle navigation device main body is a target for route guidance when the live-action image display processing means displays the live-action image of the narrow street, and the route including the narrow street searched by the route search means Is configured to selectively allow a first operation to set as, or a second operation to search for the route that bypasses the narrow street,
When the first operation is performed, the route guidance means can perform the route guidance along a route including the narrow street at least in a section other than the narrow street in the route. Formed,
The in-vehicle navigation device characterized in that the route search means is configured to search for the route that bypasses the narrow street when the second operation is performed. The live-action image display processing means displays the live-action image of the narrow street on the display unit even when the own vehicle reaches the narrow street based on the detection result of the own vehicle position detection means. Formed,
The in-vehicle navigation device main body indicates the own vehicle at the own vehicle position on the live-action image of the narrow street displayed by the live-action image display processing means when the own vehicle reaches the narrow street. 2. The vehicle image display processing means for displaying an image having a size capable of determining a ratio of an actual size of the vehicle to the narrow street as an image. The in-vehicle navigation device described. Comprising map display processing means for displaying a map around the vehicle position on the display unit;
The photographed image display processing means displays the photographed image of the narrow street when the host vehicle reaches the narrow street by automatic switching from the display of the map by the map display processing means. The in-vehicle navigation device according to claim 2, wherein the in-vehicle navigation device is formed. When the live-action image display processing means displays the live-action image of the narrow street, the scale of the live-action image of the narrow street is determined to be capable of determining whether or not the narrow street can be passed by the own vehicle. The in-vehicle navigation device according to any one of claims 1 to 3, wherein the in-vehicle navigation device is configured to be automatically set to a reduced scale. The right-left turn difficult point display processing means for displaying an image for identifying the point at a point where a right or left turn of the narrow street is regarded as difficult on the live-action image of the narrow street is provided. The in-vehicle navigation device according to any one of claims 1 to 4. The in-vehicle navigation device according to any one of claims 1 to 5, wherein the photographed image of the narrow street includes an aerial photograph or a satellite photograph.

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