JP4480528B2 - Navigation system - Google Patents

Description

  The present invention relates to a navigation system having a function of searching for a route to a destination and guiding the searched route, and more particularly to a navigation system capable of presenting weather information such as a typhoon.

  The navigation system detects the vehicle position, draws map data around the vehicle position on the display, displays the vehicle mark on the map, and scrolls the map when the vehicle position changes. It has a function to guide the road map.

  Recent navigation systems are equipped with a communication function for communicating with external servers and networks, a reproduction function for reproducing audio / video data such as CDs and DVDs, and a reception function for receiving TV broadcasts and radio broadcasts. Or has become available. In particular, by using the communication function, it is possible to obtain information about accidents and traffic jams occurring outside the vehicle in real time, and to obtain new map data and facility data from a map distribution server, etc. Improvements are being made.

  As an application example of the communication function, the present applicant, as shown in Patent Document 1, receives weather information sent from the outside, and displays the rainfall situation and weather situation based on the weather information, or A navigation device is disclosed that predicts a place where traffic restrictions and danger may occur and searches for a guidance route while avoiding this.

Japanese Patent Laid-Open No. 10-307042

  However, in the conventional navigation system, it was possible to display the weather information acquired from the server etc. on the display. There was no way to present to the driver and call attention. For this reason, the driver had to look at the destination map and then check for warning information.

  The present invention provides a navigation system that solves the above-described conventional problems and can call attention to a typhoon situation in a destination area or the like.

  An electronic device having a navigation function according to the present invention includes a display capable of displaying a road map, an acquisition unit that acquires typhoon information via a communication unit, and a region that is affected by a typhoon based on the acquired typhoon information ( (Hereinafter referred to as a typhoon-affected area), a determining means for determining whether a guidance point is included in the typhoon-affected area, and when it is determined that a guidance point is included in the typhoon-affected area, Display control means for interrupting and displaying interrupt information on the display.

  A method for displaying interrupt information in a navigation system according to the present invention, the step of acquiring typhoon information via communication means, the calculation step of calculating a typhoon influence region based on the acquired typhoon information, Determining whether or not a guidance point is included in the typhoon-affected area; and displaying a interruption information including course information of the typhoon on the display when the guidance point is included in the typhoon-affected area.

  According to the present invention, the typhoon influence range is calculated based on the typhoon information, and when the guidance point is included in this range, the interrupt information such as the typhoon course prediction is displayed. You will be alerted and warned about typhoons in your destination, such as destinations and waypoints. Thereby, the user can know the information regarding a necessary typhoon at an appropriate timing, without performing a complicated procedure as in the past.

  The best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram illustrating a configuration of an in-vehicle navigation system 1 according to the present embodiment. In the figure, a GPS receiver 10 receives radio waves from an artificial satellite (GPS satellite) and measures the current position and current direction of the vehicle. The self-contained navigation sensor 12 detects a vehicle speed sensor that detects a moving distance of the vehicle and a rotation angle of the vehicle. The VICS / FM multiple receiver 16 sequentially receives current road traffic information outside the vehicle via the antenna 14. The user input interface 20 includes an operation panel 20, a voice input unit 22, and a remote control operation unit 24, and transmits these inputs to the navigation device 1. The operation panel 20 includes a touch panel of the display 52, for example.

  The storage device 30 is preferably composed of a large capacity hard disk drive (HDD). The hard disk stores a program and a database for executing various navigation functions. The database includes map data and facility data, and the map data includes road link data and intersection data. The link data is data relating to a road connecting the intersection and the intersection data, and includes node data indicating the coordinates of the start point and the end point of the road and type data indicating the type of road (national road, ordinary road, prefectural road, etc.).

  The data communication control unit 32 enables data communication by radio or wire. The communication function may be built in the navigation device, or may externally connect a communication terminal such as a mobile phone. The user can connect to the server via the data communication control unit 32. In this embodiment, weather information related to a typhoon is acquired from a server. Further, when typhoon information is superimposed on a television broadcast or a radio broadcast, the typhoon information may be acquired therefrom.

  The voice output unit 40 includes a speaker 42 and outputs, for example, voice such as intersection guidance when guiding a route. The display control unit 50 is connected to the display 52 and displays map data and the like read from the storage device 30 or the data memory 70 on the display 52. In addition, a vehicle mark indicating the current position of the vehicle, a route to the destination, an intersection guidance display, or a landmark are combined and displayed on the map.

  The program memory 60 stores various programs executed in the navigation device 1, and the control unit 80 operates according to these programs. The program memory 60 may store a program in advance or may load a program from the storage device 30. The program memory 60 includes, for example, a program 62 for searching for a route to the destination, a program 64 for guiding the searched route, an interrupt display program 66 for displaying an interrupt of typhoon information, and the like.

  The data memory 70 includes processing results of various operations processed by the control unit 80, map data 72 read from the storage device 30, guidance route data 74 to the destination, and typhoon information acquired from the data communication control unit 32. 76. Interrupt data 78 for interrupt display is temporarily stored. The data memory 70 can be a DRAM, SRAM, flash memory or the like, and the contents of the data memory 70 may be transferred to the storage device 30. Further, an external memory that can be attached to the navigation device 1 may be used in combination with the data memory 70.

  Next, the operation of the navigation system of the present embodiment will be described with reference to the flowchart of FIG. These operations are executed by the control unit 80 in accordance with a program stored in the program memory 60. First, when a destination is set via the input interface 20 (step S101), the control unit 80 searches for a route from the current position to the destination (step S102). For the route, for example, a route having the shortest time to the destination and a route having the shortest distance are searched. The searched route is stored in the data memory 70.

  The control unit 80 reads map data around the vehicle position from the storage device 30 and causes the display 52 to display a road map around the vehicle position. At the same time, the searched route is drawn on the road map, and route guidance is started (step S103).

  Next, the control unit 80 accesses a server that distributes weather data via the data communication control unit 32 (step S104), and checks whether there is new typhoon information to be distributed to the server. (Step S105). If the server has typhoon information, the data communication control unit 32 downloads the typhoon information and stores it in the data memory 70 (step S106).

  FIG. 3 is a diagram showing an example of storing typhoon information. The control unit 80 creates a file each time typhoon information is acquired from the server, and the file information is stored in a management table for managing the file. In the management table, identification information (ID) and typhoon information acquisition time (or file creation time) are given to the files, and their storage destination addresses are given.

  FIG. 4 is an example of typhoon information acquired from the server. One file includes prediction information after 24 hours, for example, after 12 hours, in addition to the current state (actual state) information of the typhoon. The typhoon information includes a typhoon number or name, and further includes the following information. The size of the typhoon is, for example, information classified as super-large and large, and the strength of the typhoon is information classified as furious, very strong, and strong. In the case of a small typhoon that does not correspond to any strength, it is not applicable. The existing area is represented by, for example, 70 km west of XX city, and the center position is represented by north latitude XX degrees ΔΔ minutes and east longitude XX degrees ΔΔ minutes. The traveling direction of the typhoon is expressed in 16 directions, and the traveling speed of the typhoon is expressed in units of km / h. The central pressure of the typhoon is expressed in hectopascals, and the maximum wind speed is expressed in units of km / h. The storm region is a region having a radius of 25 m / s or more, and the strong wind region is a region having a radius of 15 m / s or more. The forecast circle is a range (km) where the center of the typhoon is predicted to reach. The storm warning area is a range (km) that can enter the storm area when the center of the typhoon goes into the forecast circle.

  When such typhoon information is acquired, the control unit 80 next calculates a region affected by the typhoon (hereinafter referred to as a typhoon affected region). As a calculation method, a tangent line between the circle that defines the strong typhoon area of the current typhoon and the circle that defines the typhoon warning area of the typhoon after a lapse of a predetermined time is connected, and the area surrounded by this is defined as the typhoon influence area. For example, as shown in FIG. 5, the center position of the current typhoon T1 is C1, the circle defining the storm area is Q1, the circle defining the strong wind area is R1, the center position of the typhoon T2 after 12 hours is C2, and the forecast circle Is Q2, and the circle that defines the storm warning area is R2. Two tangent lines S1 and S2 that are in contact with the strong wind region R1 and the storm warning region R2 are formed, and a region surrounded by these is defined as a typhoon influence region W. In addition, in the typhoon information, when the radius of the strong wind region and the storm region varies depending on the direction, an average of them is obtained. For example, when the radius of the storm area is 410 km on the southeast side and 110 km on the northwest side, 260 km is set as the radius of the storm area as an average value of both.

  Next, the control unit 80 determines whether or not a guidance point is included in the typhoon affected area W (step S108). The guidance point includes a vehicle position, a destination, a stopover, a transit point, or a point on the guidance route. The point on the guide route includes at least a part of the guide route. When any one of these guidance points is included in the typhoon influence area W, in other words, when the guidance point is on the expected course of the typhoon, it is determined that the interrupt condition is satisfied (step S109). Not only when all of the guidance routes are included in the typhoon influence region W, but also when at least a part of the guidance route intersects with the typhoon influence region W, it is determined that the interrupt condition is satisfied.

When the interrupt condition is satisfied, the control unit 80 creates a map representing typhoon course prediction and typhoon detailed information, and displays the map on the display 52 (step S110). Preferably, the road map of the display is north-up (N / U), and the scale is fixed to a 300 km scale. Then, the whole land map of Japan is displayed on the display, and the course forecast of typhoon is displayed on it. The following items are displayed for the expected course of the typhoon.
(A) Typhoon number (b) Target date and time of typhoon position (c) Display of typhoon center position (displayed with x)
(D) Display of current storm area (red circle), strong wind area (yellow circle) (e) Display of forecast circle (inner dotted circle) (f) Storm alert area (outer solid circle) Display (g) Tangent to forecast circle centered on typhoon

  FIG. 6 is a display example when the predicted typhoon course map is displayed as an interrupt. Here, “typhoon No. 10” is displayed as the typhoon number, “6:00 on 6th” as the target date and time of the typhoon position, and “18:00 on 6th” as the date and time after 12 hours. In addition, the current storm area is indicated by a broken-line circle, the strong wind area is indicated by a solid-line circle, a typhoon forecast circle after 12 hours is indicated by a broken line, and the storm warning area is indicated by a solid-line circle. The vehicle position mark M is shown in the typhoon influence area W.

  Further, several input buttons are displayed at the bottom of the display 52. When the detail button 100 is selected, the details of the typhoon described in FIG. 4 can be displayed on the display as text information. When the map switching button 102 is selected, the interrupt display ends and the normal navigation screen returns. When the route button 104 is selected, a route to the destination is displayed and it is possible to know which part of the route intersects the typhoon affected area W. When the voice guidance 106 is selected, typhoon information is guided by voice.

  As described above, when the guidance point is included on the expected course of the typhoon, it is possible to automatically display an interruption and call attention to the user.

  In the above embodiment, the display is north up and the expected course of the typhoon is displayed on a 300 km scale. However, the entire land map of Japan is not necessarily displayed, and the current typhoon and the position of the typhoon after a predetermined time are displayed. It may be a scale that can be displayed.

  For example, as shown in FIG. 7A, the display position of the predicted typhoon course is 3 of the current position A of the typhoon, the center position B of the forecast circle 12 hours later, and the guidance position (current position here) C. It is desirable to set the center of gravity of the point as the center position of the display 52 or the road map screen. Thereby, the position of the typhoon and the guidance position after 12 hours can be displayed on the display or the road map screen in an appropriate arrangement.

  However, the interrupt display may not be exceptional when a certain condition is satisfied. For example, when a region not included in the map data is displayed within the display range of 300 km scale, and any of the three points A, B, and C shown in FIG. If it goes outside, no interrupt display is made.

  Moreover, in the said Example, although the course prediction of the typhoon is made 12 hours after the present, it is not restricted to this. If the typhoon information distributed from the server includes course predictions at a plurality of times (after 1 hour, 6 hours, 12 hours, 24 hours, etc.), the course prediction at a desired time is appropriately selected from those. You can choose.

  In addition, when multiple typhoons occur and the typhoon information is stored in the server, the navigation system acquires the multiple typhoon information from the server, calculates the typhoon influence area W for each typhoon, and interrupts for each typhoon. It is determined whether the condition is satisfied. When an interrupt condition is satisfied for a plurality of typhoons, a course prediction for each typhoon is interrupted on the display.

  It is also possible to display a history of typhoon information when displaying an interrupt. For example, as shown in FIG. 7B, the center of two points of the current typhoon position A and the predicted typhoon position B after 12 hours are displayed so as to coincide with the center position of the map display on the display. Of course, it is also possible to display the predicted position of the typhoon after a lapse of a plurality of times in addition to 12 hours later. In this case, the center of gravity is displayed at the center of the map display.

  Further, in the above embodiment, the server is accessed when searching for the route to the destination, and the typhoon information is acquired. In addition to this, the server is accessed at regular intervals by management of a timer, It may be checked whether there is typhoon information to be updated. Of course, the server may be accessed in response to an instruction from the user.

  Next, a second embodiment of the present invention will be described. In the first embodiment, in the calculation of the typhoon influence area W, the tangents S1 and S2 between the circle R1 indicating the strong typhoon area of the current typhoon and the storm warning area circle R2 are used. However, the present invention is not limited to this. Absent. For example, as shown in FIG. 8, the range surrounded by the tangents S3 and S4 between the circle Q1 indicating the current typhoon T1 storm region and the forecast circle Q2 of the typhoon T2 after a predetermined time is the first level influence region. Similarly, a range surrounded by the strong wind circles R1 and R2 is set as the second-level affected area W2, and the first and second affected areas W1 and W2 are compared with the guidance point, It is determined that the interrupt condition is satisfied when it is included in the affected area. Then, an interrupt display according to the level of the affected area may be performed to call attention. For example, when there is a guidance point in the influence range of the first level, information indicating that it is more dangerous may be included. Thereby, the user is alerted according to the warning level.

  Further, in the calculation method of the typhoon influence area, a forecast circle or a storm warning area after a plurality of times from the current typhoon position may be used. For example, as shown in FIG. 9, an influence area W1 surrounded by tangents S1 and S2 between the current typhoon T1 and typhoon T2 after t1 is calculated, and typhoon T2 after t1 and typhoon T3 after t2 The influence area W2 surrounded by the tangent lines S3 and S4 may be calculated. When the guidance point is included in the affected area W1 or W2, an interrupt condition is established, a typhoon course prediction is displayed, and attention is drawn.

  Next, a third embodiment of the present invention will be described. In the first and second embodiments, the interrupt condition is established when the guidance point is in the typhoon-affected area W. However, in the third embodiment, the interrupt condition is further considered in consideration of the time information of the guidance point. It is determined whether or not it is established. For example, as shown in FIG. 10, if a destination G is set and a route up to that point is searched, an expected arrival time Te of the destination G is calculated. On the other hand, since the typhoon information includes the typhoon traveling speed, as shown in FIG. 11, the predicted arrival between the current typhoon T1 strong wind region R1 and the typhoon T2 storm warning region R2 after a predetermined time. If there is a time Te, the storm warning area Re at the time Te can be estimated.

  When the destination G is included in the storm warning area Re at the predicted arrival time Te, the control unit 80 may determine that the interrupt condition is satisfied and perform an interrupt display of the expected typhoon course.

  In addition, on the guidance route from the current location to the destination G, the expected passage times of a plurality of sampling points G1 to G5 at regular intervals are calculated, the typhoon warning area of the typhoon at this expected passage time is calculated, and sampling is performed on this. You may make it determine whether a point is included. Thereby, the matching of the time slot | zone which a vehicle passes and the time slot | zone which can become a typhoon prediction course is estimated, and a more accurate attention can be drawn.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Deformation / change is possible.

  The navigation system according to the present invention can be used in an in-vehicle navigation device or a computer device having a navigation function. The navigation system may include an audio function, a video function, etc. in addition to the navigation function. Furthermore, the present invention can also be applied to a marine navigation device.

It is a block diagram which shows the structure of the navigation system which concerns on the Example of this invention. It is a flowchart explaining operation | movement of the navigation system of a present Example. It is a figure which shows the example of storage of typhoon information. It is a figure explaining the content of one storage file. It is an example of calculating a range affected by a typhoon. It is an example of a display of the expected course of a typhoon. It is a figure explaining the setting method of the display position of the expected course of a typhoon. It is a calculation example of the range in which the influence by the typhoon exerts by the 2nd Example of this invention. It is an example of calculating the range affected by other typhoons. It is a figure explaining the interruption display of the typhoon information by a 3rd Example. It is a figure which shows the example of calculation of the forecast circle of a typhoon, or a storm warning area in a 3rd Example.

Explanation of symbols

1: Navigation device 10: GPS receiver 20: User input interface 30: Storage device 32: Communication control unit 40: Audio output unit 50: Display control unit 52: Display 60: Program memory 70: Data memory W, W1, W2: Typhoon affected area

Claims (12)

An electronic device with a navigation function,
A display capable of displaying a road map;
Search means for searching for a guidance route to a destination, waypoint or stopover;
Acquisition means for acquiring typhoon information via communication means;
A calculation means for calculating an area affected by the typhoon (hereinafter referred to as a typhoon influence area) based on the acquired typhoon information;
Determining means for determining whether or not the guidance route is included in a typhoon-affected region;
When it is determined that the guidance path is included in the typhoon-affected area, the display control means for interrupting and displaying interrupt information on the display,
The calculating means includes a destination of the guidance route from a typhoon affected area of the first time acquired from the acquiring means and a typhoon affected area of a second time after a predetermined time has elapsed from the first time, Determining whether the expected arrival time of the place or stopover is included between the first time and the second time, and the expected arrival time is between the first time and the second time When it is determined that the typhoon influence area of the first time and the typhoon influence area tangent to the typhoon influence area of the second time are estimated,
The display control means performs an interrupt display of the expected course of the typhoon including the typhoon influence area of the expected arrival time.
Electronic equipment. The typhoon information includes typhoon current status information and forecast information, and the calculation means is based on a typhoon first impact range obtained from the current status information and a typhoon second impact range obtained from the forecast information. The electronic device according to claim 1, wherein the electronic device is calculated. The first affected area is a typhoon storm area or strong wind area, the second affected area is a typhoon forecast circle or storm warning area, and the calculation means includes a storm area or strong wind area and a forecast circle or storm warning. The electronic device according to claim 2, wherein a region surrounded by a tangent line in contact with the region is calculated. The guidance point includes a vehicle position, a destination, a waypoint, a stopover point, or a point on a guidance route, and the display control means includes a vehicle position, a destination, a waypoint, or a point on the guidance route. The electronic device according to claim 1, wherein when it is determined that any one is included in the typhoon-affected area, the interrupt information is displayed as an interrupt. The determination unit determines whether at least a part of the guidance route is included in the typhoon influence region, and the display control unit determines that at least a part of the guide route is included in the typhoon influence region, The electronic device according to claim 1, wherein interrupt information is displayed in an interrupt manner. The electronic device according to claim 1, wherein the interrupt information includes a course prediction of a typhoon. The electronic device according to claim 6, wherein the display control unit displays a guidance point together with a predicted typhoon course on the display. The electronic device according to claim 1, wherein the interrupt information includes typhoon history information. A method for displaying interrupt information in a navigation system,
Searching for a guidance route to a destination, waypoint or stopover;
Acquiring typhoon information via communication means;
A calculation step for calculating a typhoon influence region based on the acquired typhoon information;
Determining whether a guidance point is included in the calculated typhoon-affected region;
When a guidance point is included in the typhoon-affected area, the display includes interrupt information including a predicted typhoon course on the display.
The calculating step further includes the purpose of the guidance path from the typhoon affected area of the first time acquired from the acquiring step and the typhoon affected area of the second time after a predetermined time has elapsed from the first time. Determining whether an expected arrival time of a place, a stopover or a stopover is included between the first time and the second time, and the expected arrival times of the first time and the second time When it is determined that the typhoon influence area of the first time and the typhoon influence area tangent to the typhoon influence area of the second time are estimated,
The step of displaying performs an interrupt display of an expected course of a typhoon including a typhoon influence area of an expected arrival time.
For displaying interrupt information. The interrupt information display method according to claim 9, wherein the displaying step performs an interrupt display when a road map by a navigation function is displayed on a display. The calculation step according to claim 9, wherein the calculating step calculates a typhoon influence region based on a strong wind region or a storm region obtained from current typhoon information and a typhoon forecast circle or a storm warning region obtained from forecast information. How to display information. The interrupt information display method according to claim 9, wherein the determining step determines whether or not at least a part of the guide route is included in the typhoon-affected region as a guide point.

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