JP3861642B2 - Vehicle navigation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle navigation apparatus that is mounted on a vehicle and searches for the shortest route from a departure point to a destination, and more particularly to an intersection map display system that supports smooth operation of intersections.
[0002]
[Prior art]
When displaying an intersection in a conventional navigation device mounted on a vehicle, an enlarged map near the intersection is drawn as drawing data in advance, an arrow is displayed on the enlarged map near the intersection, and a road at the intersection is displayed. A display method for providing guidance is known.
[0003]
In recent years, various navigation devices mounted on vehicles have been proposed (for example, Japanese Patent Application Laid-Open Nos. 62-51000, 1-173298, and 2-759098). ).
[0004]
[Problems to be solved by the invention]
However, at present, such an intersection display has not yet been displayed in detail as the vehicle travels. Therefore, the present invention changes the display of the intersection map of the navigation device mounted on the vehicle according to the actual progress of the intersection of the vehicle, and makes it comfortable and smooth by the fine display suitable for the actual operation. An object of the present invention is to provide a vehicle navigation device that can support simple operation.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention
(1) Based on the information storage means for storing the map information, the current position detection means for detecting the current position of the vehicle, the input means for inputting the destination, and the map information in the information storage means, Route calculation means for calculating a route to the destination input by the input means, route storage means for storing the route calculated by the route calculation means, and detected by the current position detection means Route guidance means for reading out route information from the route storage means based on the current position and performing guidance, and the route guidance means, when the current position of the vehicle reaches a first predetermined distance before the intersection , display position indication mark of the arrow and the vehicle showing the path of the bar graph and the intersection indicating the remaining distance to the intersection, until the current position of the vehicle reaches a second predetermined distance before the intersection, Fixing the position display mark serial vehicle, first display means does not change the length of the arrow, the current position of the vehicle reaches the second predetermined distance, erases the bar graph, the progress of the vehicle with moving the position mark of the vehicle is obtained by so provided, a second display means for erasing leaving remaining distance component to the intersection with the base of the arrow to the progress of the vehicle.
[0006]
(2) Based on the information storage means for storing the map information, the current position detection means for detecting the current position of the vehicle, the input means for inputting the destination, and the map information in the information storage means, Route calculation means for calculating a route to the destination input by the input means, route storage means for storing the route calculated by the route calculation means, and detected by the current position detection means Route guidance means for reading out route information from the route storage means based on the current position and performing guidance, and the route guidance means is configured to cross the intersection when the current position of the vehicle reaches a first predetermined distance before the intersection. and displays a bar graph and the intersection diagram indicating the remaining distance to the position indication mark of the vehicle with arrows indicating the path of the intersection displayed on the intersection diagram, the current position of the vehicle is crossing Given during the up to the second predetermined distance before, fixing the position indication mark of the vehicle, a first display means does not change the length of the arrow, the current position of the vehicle is the second reaches the distance, it erases the bar, first with the progress of the vehicle to move the position mark of the vehicle, to erase the base of the arrow leaving the remaining distance component to the intersection with the progress of the vehicle 2 and display means, in which as provided.
[0009]
[Effects and effects of the invention]
As described above in detail, according to the present invention, in the intersection map display method of the navigation device mounted on the vehicle, the display of the intersection map is changed according to the progress of the actual vehicle intersection, and the actual operation is performed. The detailed display suitable for can comfortably support smooth operation.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. Hereinafter, a system configuration of a navigation apparatus to which the present invention is applied will be described. FIG. 3 is a system configuration diagram of a navigation apparatus to which the present invention is applied.
[0011]
This navigation device is mounted on a vehicle and includes a current position detection device 10, an information processing control device 20, an input / output device 40, and an information storage device 50, as shown in FIG. First, the current position detection device 10 has the following configuration. The absolute direction sensor 11 is, for example, a geomagnetic sensor that detects in which direction the vehicle is located from detection in the N direction based on a magnet, and may be any means that detects the absolute direction.
[0012]
The relative azimuth sensor 12 detects, for example, whether or not an intersection is bent, and may be an optical rotation sensor attached to a rotating part of a handle, a rotational resistance volume, or an angle sensor attached to a wheel part. Further, a gyro sensor that detects a change in angle using an angular velocity may be used. That is, any means capable of detecting an angle that has changed relative to the reference angle (absolute direction) may be used. The distance sensor 13 may be, for example, one that detects and counts the rotation of a wheel, or one that detects acceleration and integrates twice. That is, any means capable of measuring the moving distance of the vehicle may be used.
[0013]
The GPS (Global Positioning System) receiver 14 is a device that receives a signal from an artificial satellite, and includes various signals such as signal transmission time, position information of the receiver, moving speed of the receiver, and traveling direction of the receiver. Information can be obtained. The beacon receiving device 15 is a device that receives a signal transmitted from a transmitting device installed at a specific point. In particular, VICS information can be obtained, and information related to vehicle travel such as traffic jam information, current position information, and parking lot information can be obtained.
[0014]
The data transmission / reception device 16 is a device for communicating with the outside of the vehicle using a telephone line or radio waves and exchanging information. For example, there are various usage methods such as a car phone, ATIS, VICS, GPS correction, and inter-vehicle communication, and it is possible to input / output information related to traveling. Next, the information processing control device 20 performs calculation and control based on the information input from the current position detection device 10 and the input / output device 40 and the information stored in the information storage device 50, and displays the calculation result on the display 42. , A means for controlling to output to the output means such as the printer 43 or the speaker 44.
[0015]
The information processing control device 20 has the following configuration. The central processing unit (CPU) 21 performs overall calculation and control of the entire navigation device. The first ROM 22 stores a navigation program, in particular, a navigation program related to current position detection, route search, display guidance, and the like. The sensor input interface 23 is a means for receiving information from the current position detection device 10.
[0016]
The RAM 24 stores information input by the user such as destination information and passage point information input by the input device 41, which will be described later, and results calculated by the CPU 21 based on the user input information, It is a storage means for storing a route search result or map information read from the storage information device 50. The communication interface 25 is a means for inputting / outputting information from the current position detecting means 10, particularly information obtained from the outside.
[0017]
The second ROM 26 stores a program related to navigation, particularly a navigation program related to voice guidance. The image processor 27 is a processing means for processing vector information processed by the CPU into image information. The clock 28 keeps time. The image memory 29 is means for storing image information processed by the image processor. The audio processor 30 processes the audio information read from the information storage device and outputs it to the speaker 44.
[0018]
The input / output device 40 includes an input device 41 for inputting data such as a destination, a passage point, and a search condition by a user. Examples of the input / output device 40 include a touch switch, a joystick, and a key switch, and a display 42 that displays an image. It comprises a printer 43 for printing information and a speaker 44 for outputting sound. The information storage device 50 is connected to the information processing control device 20 via the transmission path 45. The information storage device 50 includes a map data file 51, an intersection data file 52, a node data file 53, a road data file 54, a photo data file 55, a destination data file 56, a guidance point data file 57, a detailed destination data file 58, A destination reading data file 59 and other data files 60 are stored. The information storage device 50 is generally composed of a CD-ROM, an IC card or the like as an optical magnetic medium, but may be composed of a floppy disk or the like as a magnetic storage medium.
[0019]
The navigation device is achieved by the above configuration, and reads map information from the information storage device 50 and displays it on the display based on the current position detected by the current position detecting means. Further, when the destination is input, the route from the current position to the destination is calculated by the information processing control device 20 and detected by the current position detection device 10 (for example, a GPS receiver, a relative azimuth sensor, a distance sensor). Route guidance is performed by tracking the current position.
[0020]
For example, in the middle of a route that has a long distance to the next intersection, in order to give the driver a sense of security that the route has not been deviated, a photograph of a feature being passed is read from the photo data file 55 and displayed on the screen. To do. Alternatively, the map data file 51 is read, the guide map and the vehicle position are displayed, and the travel position on the route is notified. When the intersection is near, the intersection data file 52 is read, and the intersection is drawn and output.
[0021]
For example, when there is a road network composed of intersection numbers I to VII and road numbers (1) to (14) as shown in FIG. 4, for example, the road number (1) is the same as shown in FIG. It has the next road number (11) having the start point, the next road number (4) having the same end point, the start point is the intersection number II, the end point is the intersection number I, the node string pointer A000, the road length 1000 m Can be defined. In this way, road numbers can be sequentially defined and road networks can be defined.
[0022]
FIG. 5 is a diagram showing data relating to intersections. As shown in FIG. 5A, for each intersection, intersection number, intersection coordinates (east longitude / north latitude), connection road information, landmark (marker pattern) data address, Size etc. are attached. As shown in FIG. 5B, the landmark (marking pattern) data includes, for each landmark, landmark coordinates (east longitude / north latitude), a mark pattern number, a facing road number (the landmark is at the corner of the intersection). If it is located, two road numbers are stored). As shown in FIG. 5C, the mark pattern numbers are, for example, “0” for XX bank mark drawing data, “1” for ◇◇ bank mark drawing data, and “2” for □□ bank mark drawing data. , “3” is ΔΔGS mark drawing data, and 4 is ▽▽ GS mark drawing data.
[0023]
FIG. 7 is a diagram showing the structure of road data according to the present invention (part 1), FIG. 8 is a diagram showing the structure of road data according to the present invention (part 2), and FIG. Yes, for each road, for example, as shown in FIGS. 4 and 6, for each road number (1) to (14), the length, road attribute data [see FIG. 8 (a)], shape data address, size , The guide data address and size, and the shape data includes, for example, east longitude and north latitude data as shown in FIG. Further, as shown in FIG. 7C, the guidance data has an intersection name, presence / absence of a traffic signal, landmark data, attention point data, road name, road name voice data address, size, destination data address, and size.
[0024]
Further, as shown in FIG. 7D, the destination data includes a destination road number, a destination name, a destination name voice data address, a size, a destination direction data, a travel guide data, and the like. As shown in FIG. 7E, the destination direction data is: -1: invalid, 0: unnecessary, 1: straight ahead, 2: right direction, 3: diagonal right direction, 4: return direction to right, 5: left Data in any of the direction, 6: diagonal left direction, and 7: direction returning to the left.
[0025]
Furthermore, the above-mentioned road attribute data is, for example, as shown in FIG. 8 (a), data on an overpass / overpass, an overpass, an underpass, an underpass, an underpass, etc. It has data such as 2 lanes, 1 lane, and no center line. Further, as shown in FIG. 8B, for example, the road name data has a road type and a type number, and as a road type, an expressway, a city highway, a toll road, and a general road are: It is divided into national roads, prefectural roads, and other roads. The highway is “1” if it is a main line, and “2” if it is an attachment (branch road) connected to the next road. Each is numbered below.
[0026]
Furthermore, as shown in FIG. 8C, the above-mentioned attention point data includes a railroad crossing, a tunnel entrance, a tunnel exit, a width reduction point, and none. Further, as shown in FIG. 8D, the travel guidance data includes, from the right, from the left, from the center, and from none. Next, a basic processing method for navigation will be described.
[0027]
FIG. 9 is a basic processing flowchart of navigation according to the present invention. First, the current position detected by the current position detection device is detected (step S21). Next, destination input processing is performed (step S22). The destination input process can be input, for example, on a menu screen displayed from the input device 41. It can also be entered by telephone number.
[0028]
Next, a process for searching for a route to the destination is performed based on the current position detected by the current position detection process and the destination input by the destination input process (step S23). More specifically, the node on the road closest to the input destination coordinates is calculated. Route search processing is executed based on search conditions (for example, the shortest distance, the shortest time, priority of toll roads, ease of travel, etc.) from the current position to the calculated node. Next, route guidance is executed based on the movement of the current position from the detection result of the current position detection means (for example, GPS, gyro sensor, distance sensor, etc.) according to the route searched by the route search process (step S24). ).
[0029]
Hereinafter, the intersection map display method of the navigation device of the present invention will be described. FIG. 1 is an explanatory diagram of an intersection diagram display method of a navigation apparatus showing an embodiment of the present invention. FIG. 1 (a) is an intersection diagram display diagram showing the first remaining distance display, and FIG. 1 (b). FIG. 6 is an intersection diagram display diagram showing the second remaining distance display. FIG. 2 is an intersection display flowchart of the navigation device.
[0030]
In FIG. 1A, 1 is an intersection map, 2 is a gas station as a landmark near the intersection, 3 is a place name display section, 4 is a remaining distance display section in the first remaining distance display, and 5 is a first remaining display. A vehicle position display mark 6 in the distance display is an arrow indicating a route at the intersection in the first remaining distance display (the length of the arrow does not change as the vehicle travels).
[0031]
Further, in FIG. 1B, 7 is a vehicle position display mark in the second remaining distance display, and 8 is an arrow that displays the remaining distance display in the second remaining distance display and the route at the intersection (according to the progress of the vehicle). There is a change in the length of the arrow). Thus, when the distance to the intersection of the vehicle is a first predetermined distance, for example, 300 m, the first remaining distance display is performed as shown in FIG. That is, in the first remaining distance display, the distance of the vehicle from the intersection is displayed on the remaining distance display unit 4 in a bar graph shape. The bar graph changes as the vehicle moves. For example, blue may be displayed on the ground, yellow may be displayed on the length of the remaining distance, and the background color may be erased from the top of yellow by the amount the vehicle has moved. The display may be rewritten with movement. In this way, the display of the bar graph is shortened, so that it can be visually recognized that the vehicle is approaching the intersection. At the same time, the route at the intersection is displayed by the arrow 6. However, in the display at this stage, the vehicle position display mark is fixed, and the length of the arrow 6 indicating the route itself does not change with the progress of the vehicle.
[0032]
Next, when the distance to the vehicle intersection reaches a second predetermined distance, for example, 150 m, the second remaining distance display is performed as shown in FIG. That is, the display by the remaining distance display unit 4 is erased. For example, it can be erased by repainting the intersection map screen so that the remaining distance display unit 4 is painted with the same color as the background color or the remaining distance display unit 4 cannot be written. Cash strong point in the remaining distance display, performing the remaining distance display by arrow 8. That is, the vehicle position display mark moves as the vehicle travels, and the base of the arrow 8 is gradually erased and shortened so as to represent the remaining distance to the intersection, and accurately represents how the vehicle approaches the intersection. Can do.
[0033]
In addition, when the second predetermined distance is reached, it is possible to easily recognize that the remaining distance is within the second predetermined distance by changing the display color of the arrow. The color can be changed by simply changing the color palette for display, or by changing the color of the arrow and redisplaying. For example, when the first remaining distance is displayed, the arrow is displayed in green, and the second remaining distance is displayed in yellow, so that it can be easily recognized that the vehicle has entered the second remaining distance display area.
[0034]
Hereinafter, a specific example of the intersection map display of the navigation apparatus will be described with reference to FIGS. 1 and 2. (1) First, the coordinates of the node on the road closest to the coordinates of the destination input from the input device 41 are searched, and the corresponding node is set as a temporary destination (final guide point) (step S1). .
[0035]
(2) Next, the current position detected by the current position detection means, the temporary destination and the search conditions input by the input means (passage point, priority of toll road, shortest route, easy road, etc.) In response, a route to the destination is searched (step S2). (3) The current position is acquired from the current position detecting means (step S3).
[0036]
(4) It is determined whether or not the destination has been reached from the obtained current position and the coordinates of the destination (step S4). (5) If it is determined that the destination has not been reached, it is determined whether the distance to the next intersection requiring guidance is within 300 m (step S5). That is, it is determined whether the first predetermined distance has been reached.
[0037]
(6) If YES in step S5, it is determined whether the distance to the next intersection is within 150 m (step S6). That is, it is determined whether the second predetermined distance has been reached. (7) If YES in step S6, it is checked whether or not the intersection map in the second remaining distance display area is being displayed (step S7).
[0038]
(8) In the case of NO in step S7, an intersection diagram display of the second remaining distance display area is performed (step S8). (9) Next, the intersection map display of the second remaining distance display area is updated and displayed from the remaining distance (step S9). (10) If the distance to the next intersection is not less than 150 m in step S6, that is, if the distance to the next intersection is between 300 m and less than 150 m, the intersection of the first remaining distance display area It is checked whether the figure is being displayed (step S10).
[0039]
(11) In the case of NO in step S10, the intersection map display of the first remaining distance display area is performed (step S11). (12) Next, the first remaining distance display is updated and displayed from the remaining distance (step S12). (13) If NO in step S5, it is checked whether an intersection map is being displayed (step S13).
[0040]
(14) If YES in step S13, a map is displayed (step S14). Thereafter, when passing through the intersection, the process returns to step S3. In the present invention, when the distance between the vehicle current position and the intersection is the first predetermined distance and the second predetermined distance, the remaining distance display form is changed to change the display mode of the remaining distance to the user. Provide an indication.
[0041]
Further, the present invention is not limited to the above-described embodiments, and various modifications can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an intersection diagram display method of a navigation device showing an embodiment of the present invention.
FIG. 2 is an intersection display flowchart of the navigation device showing the embodiment of the present invention.
FIG. 3 is a system configuration diagram of a navigation apparatus to which the present invention is applied.
FIG. 4 is an explanatory diagram of a road network definition of the navigation device according to the present invention.
FIG. 5 is an explanatory diagram of intersection data of the navigation device according to the present invention.
FIG. 6 is an explanatory diagram of a road network and route search of the navigation device according to the present invention.
FIG. 7 is an explanatory diagram of road data (part 1) of the navigation device according to the present invention.
FIG. 8 is an explanatory diagram of road data (part 2) of the navigation device according to the present invention.
FIG. 9 is an explanatory diagram of a basic processing flow of navigation according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Intersection figure 2 Gas station as a landmark near the intersection 3 Place name display part 4 Remaining distance display part 5 in the first remaining distance display 5 Position display mark 6 of the vehicle in the first remaining distance display In the first remaining distance display An arrow indicating the route at the intersection 7 A vehicle position display mark 8 in the second remaining distance display 8 An arrow 10 indicating the remaining distance display in the second remaining distance display and the route at the intersection 10 Current position detection device 11 Absolute direction sensor 12 Relative direction sensor 13 Distance sensor 14 GPS receiver 15 Beacon receiver 16 Data transmitter / receiver 20 Information processing controller 21 Central processing unit (CPU)
22 First ROM
23 Sensor input interface 24 RAM
25 Communication interface 26 2nd ROM
27 Image processor 28 Clock 29 Image memory 30 Audio processor 40 Input / output device 41 Input device 42 Display 43 Printer 44 Speaker 45 Transmission path 50 Information storage device 51 Map data file 52 Intersection data file 53 Node data file 54 Road data file 55 Photo data File 56 Destination data file 57 Guidance point data file 58 Detailed destination data file 59 Destination reading data file 60 Other data files

Claims (2)

Information storage means for storing map information;
Current position detection means for detecting the current position of the vehicle;
An input means for inputting a destination;
A route calculation means for calculating a route to the destination input by the input means based on the map information in the information storage means;
Route storage means for storing the route calculated by the route calculation means;
Based on the current position detected by the current position detecting means, and route guidance means for reading the route information from the route storage means and performing guidance,
The route guidance means
When the current position of the vehicle reaches a first predetermined distance before the intersection, to display the position indication mark of the arrow and the vehicle showing the path of the bar graph and the intersection indicating the remaining distance to the intersection, the current position of the vehicle is an intersection First display means for fixing the vehicle position display mark and not changing the length of the arrow until reaching a second predetermined distance before
When the current position of the vehicle reaches the second predetermined distance, and erasing the bar, with the progress of the vehicle to move the position mark of the vehicle, the base portion of the arrow until the intersection with the progress of the vehicle a second display means for erasing leaving remaining distance component,
A vehicle navigation device comprising: Information storage means for storing map information;
Current position detection means for detecting the current position of the vehicle;
An input means for inputting a destination;
A route calculation means for calculating a route to the destination input by the input means based on the map information in the information storage means;
Route storage means for storing the route calculated by the route calculation means;
Based on the current position detected by the current position detecting means, and route guidance means for reading the route information from the route storage means and performing guidance,
The route guidance means
When the current position of the vehicle reaches the first predetermined distance before the intersection, a bar graph indicating the remaining distance to the intersection and an intersection diagram are displayed, and the vehicle position display mark is displayed along with an arrow indicating the route at the intersection. First display means for fixing the vehicle position display mark and changing the length of the arrow until the current position of the vehicle reaches a second predetermined distance before the intersection ,
When the current position of the vehicle reaches the second predetermined distance, and erasing the bar, with the progress of the vehicle to move the position mark of the vehicle, the base portion of the arrow until the intersection with the progress of the vehicle a second display means for erasing leaving remaining distance component,
A vehicle navigation device comprising:

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