JPH112541A - On board navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely determine a running road so as to prevent incorrect guide information from being presented by map-matching the current position of a vehicle in such a manner that the vehicle is located in the highway by a control means on detecting that the vehicle advances into the highway. SOLUTION: In the case of passing through a highway, a pass received at an inlet of the highway is inserted in a card insert port 3a of a card reader 3 connected to a navigation device body 10, and data showing the name of the highway and the name of the entrance is read from the magnetic recording part of the pass to be output to a control part 16. The control part 16 determines that the vehicle runs through the highway according to the input data, and for example, displays the message 'highway running' on the map image of the periphery of the vehicle displayed on a display device 7 in such a manner as to overlap each other. The position of a driver's own car detected by a GPS receiver 4 or a selfcontained navigatio sensor 5 is corrected (map- matching) in such a manner that the vehicle is located on the highway.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle navigation device for searching for an optimal guide route to a destination and guiding a vehicle to the destination along the guide route, and particularly to a GPS (Global Positioning System) and the like. The present invention relates to an in-vehicle navigation device having a map matching function for correcting the current position of a vehicle detected on the basis of map data so that the vehicle is located on a road.

[0002]

2. Description of the Related Art On-vehicle navigation devices include a map data storage device such as a CD-ROM or an IC card in which map data is recorded, a display device such as a liquid crystal display, and a vehicle such as a gyro, a GPS and a mileage sensor. It has a vehicle movement detection device that detects the position and current direction, reads out map data including the current position of the vehicle from the map data storage device, and draws a map image around the vehicle position on the display screen based on the map data. Along with
The vehicle position mark (location) is displayed superimposed on the map image, and the map image is scrolled according to the movement of the vehicle, or the vehicle position mark is moved by fixing the map image on the screen, You can see at a glance where you are driving.

[0003] In addition, usually, a car navigation system is equipped with a route guidance function that allows a user to easily travel to a desired destination without making a mistake on a road. According to this route guidance function, the lowest cost route from the starting point to the destination using the map data is automatically searched by performing a simulation calculation such as the horizontal search method or the Dijkstra method, and the searched route is guided. The route is stored as a route, and during driving, the guidance route is drawn on the map image in a different color from the other roads and displayed thicker, or displayed on the screen, or a certain distance to the intersection where the vehicle should change the route on the guidance route When the vehicle approaches, the user is guided to the destination by displaying an arrow indicating the course at an intersection where the course on the map image should be changed.

The cost is a value obtained by multiplying a constant according to a road width, a road type (such as a general road or an expressway), a right turn, a left turn, and the like based on the distance, a predicted traveling time of the vehicle, and the like. , The degree of appropriateness as a guidance route is quantified. Even if there are two routes having the same distance, the cost differs depending on whether the user specifies, for example, whether to use a toll road, or gives priority to distance or time.

A map stored in a map data storage device such as a CD-ROM has a longitude width of an appropriate size according to a scale level such as 1/12500, 1/25000, 1/50000, and 1/100000. Roads and the like are stored as a coordinate set of vertices (nodes) represented by longitude and latitude. A road is formed by connecting two or more nodes, and a portion connecting the two nodes is called a road link. The map data includes (1) a road layer including a road list, a node table, an intersection configuration node list, and the like; (2) a background layer for displaying roads, buildings, facilities, parks, rivers, and the like on a map screen; (3) Administrative division names such as municipalities,
It is composed of a character / symbol layer for displaying characters such as road names, intersection names and building names, and map symbols.

[0006]

Normally, an on-vehicle navigation device detects a vehicle position using a GPS or a self-contained navigation sensor, and uses a map data read from a CD-ROM so that the vehicle is located on a road. The vehicle position is corrected (map matching). However, in the conventional on-vehicle navigation device, even when the vehicle is traveling on the highway, the vehicle position is map-matched to a general road parallel to the highway, or conversely, the vehicle is traveling on the general road. Regardless, there is a possibility that wrong guidance information may be provided to the user by performing map matching on an expressway parallel to a general road. In particular, in the vicinity of the entrance and exit of the expressway, the expressway and the general road are often parallel to each other, and a malfunction is likely to occur in such a place.

[0007] From the above, it is an object of the present invention to determine whether a vehicle is traveling on a highway or a general road more reliably, and to provide a user with no erroneous guidance information. It is to provide a navigation device for use.

[0008]

The above-mentioned objects are achieved by displaying means for displaying a map image, map data storing means for storing map data, vehicle position detecting means for detecting a current position of a vehicle, Expressway entry detection means for detecting entry to an expressway, and map data around the current position of the vehicle detected by the vehicle position detection means are read from the map data storage means and a map image is drawn on the display means. Control means, when the control means detects that the expressway entry detection means has entered the highway,
The present invention solves the above problem by a vehicle-mounted navigation device, wherein map matching is performed on the current position of the vehicle detected by the vehicle position detecting means so that the vehicle is located on the highway.

In the present invention, the expressway includes a toll road. Hereinafter, the operation of the present invention will be described. The in-vehicle navigation device according to the present invention has a highway entry detecting means for detecting that the vehicle has entered the highway. The highway entry detecting means may use a card reader that reads data of a traffic card passed at the entrance of the highway and detects that the vehicle has entered the highway. Also, in recent years, an automatic toll settlement system that identifies a vehicle by communicating with an automatic toll settlement machine installed at the entrance of a highway and that charges a fee has been developed.
It is possible to use a communication device that performs communication with the automatic fee settlement machine.

When detecting that the vehicle has entered the expressway by such an expressway entry detecting means, the control unit determines the current position of the vehicle detected by the vehicle position detecting means so that the vehicle is located on the expressway. To be corrected. Therefore, the in-vehicle navigation device of the present invention prevents a problem that map matching is performed on a general road even though the vehicle is traveling on a highway.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. (First Embodiment) FIG. 1 is a block diagram showing a vehicle-mounted navigation device according to a first embodiment of the present invention.

A CD-ROM 1 stores map data. The CD-ROM 1 stores a road layer, a background layer, and a character / symbol layer. Also, this C
The D-ROM 1 stores the position and name of each entrance and each exit of the expressway, and the toll for each section. 2
An operation unit is provided with various operation buttons and the like for operating the navigation device body 10 described later. A card reader 3 reads data from a highway traffic card. As shown in FIG. 2, the card reader 3 is provided with a card insertion slot 3a for inserting a passing card, and when passing through the highway, a passing card passed to the card insertion slot 3a at the entrance of the highway is inserted. It is designed to be inserted.

Reference numeral 4 denotes a GPS for receiving a GPS signal sent from a GPS satellite and detecting the longitude and latitude of the current position.
It is a receiver. Reference numeral 5 denotes a self-contained navigation sensor. The self-contained navigation sensor 5 includes an angle sensor 5a such as a gyro for detecting a rotation angle of the vehicle, and a traveling distance sensor 5b for generating a pulse at every constant traveling distance. Reference numeral 7 denotes a liquid crystal display device,
Displays a map around the current position of the vehicle on the display device 7, displays a guidance route from the departure point to the destination, a vehicle position mark, and other guidance information.

The navigation apparatus main body 10 comprises the following. Reference numeral 11 denotes a buffer memory for temporarily storing map data read from the CD-ROM 1. 12 is an interface connected to the operation unit 2,
13 is an interface connected to the card reader 3;
14 is an interface connected to the GPS receiver 4,
Reference numeral 15 denotes an interface connected to the self-contained navigation sensor 5. Reference numeral 16 denotes a control unit. The control unit 16 detects the current position of the vehicle based on various information input from the interfaces 14 and 15 and reads map data of a predetermined area from the CD-ROM 1 to the buffer memory 11. Or search for an optimal guidance route from the departure place to the destination under the set search conditions.

A map drawing unit 17 generates a map image using the map data stored in the buffer memory 11.
Is a VR that stores the map image generated by the map drawing unit 17
AM. 19 is a VRA according to an instruction from the control unit 16.
The display device 7 in the map image stored in M18
The control unit 16 controls the image reading unit 19 to smoothly scroll the map image displayed on the display device 7.

A guide route storage unit 20 stores the guide route searched by the control unit 16, and a guide route drawing unit 21 draws the guide route. The control unit 1 is stored in the guidance route storage unit 20.
6 are recorded from the starting point to the destination. When displaying the map, the guide route drawing unit 21 reads the guide route information (node sequence) from the guide route storage unit 20 and draws the guide route in a color and line width different from those of other roads.

Reference numeral 22 denotes an operation screen generator for generating various menu screens (operation screens) in accordance with the operation status, and reference numeral 23 denotes a mark generator for generating various marks such as a vehicle position mark and a cursor. Reference numeral 24 denotes an image synthesizing unit, and an image reading unit 19
In the map image read out from the VRAM 18, various marks generated by the mark generation unit 23 and the operation screen generation unit 2
The operation screen generated in step 2, the guidance route drawn by the guidance route drawing unit 21, and the like are superimposed and displayed on the display device 7.

In the vehicle navigation system thus configured, the control unit 16 detects the current position of the vehicle from the GPS signal received by the GPS receiver 4 and the signal input from the self-contained navigation sensor 5, and detects the current position of the vehicle. Map data of the area including the current position of the vehicle from the ROM 1 is stored in the buffer memory 1
Read to 1. Then, the control unit 16 controls the GPS receiver 4
The self-vehicle position detected by the signal input from the self-contained navigation sensor 5 is corrected (map matching) so that the vehicle is located on the road using the map data read into the buffer memory 11.

When a user passes a highway at the entrance of the highway, the user inserts the highway card into the insertion slot 3a of the card reader 3. Card reader 3
Reads data indicating the name of the expressway and the name of the entrance from the magnetic recording unit of the traffic card, and outputs the data to the control unit 16. The control unit 16 determines that the vehicle is traveling on the highway based on the data input from the card reader 3, and for example, displays a message “running on the highway” in a map image around the vehicle displayed on the display device 7. Display them superimposed. Then, the control unit 16 corrects (map matching) the vehicle position detected by the GPS receiver 4 and the self-contained navigation sensor 5 so that the vehicle is located on the expressway.

The control unit 1 responds to a user operation.
Reference numeral 6 reads the toll data for the expressway from the CD-ROM 1 into the buffer memory 11 and displays a toll table to each expressway exit present in the vehicle traveling direction on the display device 7. After the pass card is removed from the card reader 3, the control unit 16 sets the vehicle in the CD-ROM 1.
When the vehicle passes through the exit position of the highway stored in the highway, the vehicle enters the general road from the highway, and stops the map matching to the highway and starts the map matching to the general road.

Further, the control unit 16 automatically stores the date, the section, the toll, and the like of the vehicle on the highway, and records these records according to the operation of the user, for example, as shown in FIG. The information is displayed on the display device 7. In the in-vehicle navigation device according to the present embodiment, when a passing card is inserted into the card reader 3, it is determined that the vehicle has entered the highway, and when the passing card is removed from the card reader 3, the vehicle is moved from the highway to a general road. Since it is determined that the vehicle has entered the vehicle, it is possible to prevent the vehicle position from being map-matched to a general road and providing incorrect guidance even when the vehicle is traveling on a highway.

In this embodiment, a vehicle travels on a highway with a navigation device when a traffic card is given at the entrance of the highway and the return card is returned at the exit. When the vehicle travels on a highway that does not have such a system, the vehicle travels up to the vehicle position detected by the GPS receiver 4 or the self-contained navigation sensor 5 as in the related art. Map matching to road or guidance route. Therefore, even if the passing card is not inserted into the card reader 3, the control unit 16 performs the map matching of the vehicle position on the extension of the road on which the vehicle has been traveling or on the road along the guidance route.
Then, when the vehicle travels to a point where the expressway and the general road are not parallel, the control unit 16 can accurately determine whether the vehicle is traveling on the expressway or the general road.

The operating section 2 is provided with a "highway / general road" button. When the control section 16 recognizes that the vehicle is traveling on a general road, a message "running on a highway" is displayed on the screen. When the user presses the “highway / general road” button on the operation unit 2 when the vehicle is not displayed, the control unit 16 determines that the vehicle is running on the highway, performs map matching of the vehicle position on the highway, When the "highway / general road" button is pressed while the message "running on highway" is displayed on the screen, the control unit 16 determines that the vehicle is traveling on a general road, and changes the vehicle position to the general position. Map matching may be performed on a road. However, in this case, even if the "highway / general road" button is pressed, if there is only one of the highway and the general road near the vehicle position detected by the GPS receiver 4 and the self-contained navigation sensor 5, " Regardless of the "highway / general road" button, the control unit 16 performs map matching on a road near the vehicle position.

(Second Embodiment) FIG. 4 is a block diagram showing a vehicle-mounted navigation device according to a second embodiment of the present invention. 4, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. In recent years, a unique ID code (recognition number) has been registered for each vehicle as a highway toll settlement system.
The highway toll for each vehicle is tabulated by code,
An automatic toll payment system that collects bills at a later date has been developed. In this automatic fare clearing system, as shown in FIG. 5, information such as an ID code and a toll is transmitted and received between a vehicle 32 and an automatic fare clearing machine 31 installed at an entrance and an exit of an expressway. . This embodiment corresponds to such a system.

In FIG. 4, reference numeral 6 denotes a communication device for communicating with an automatic toll settlement machine installed at the entrance and exit of the expressway, and reference numeral 26 denotes an interface connected to the communication device 6. The automatic toll settlement machine installed at the entrance of the expressway transmits an ID request signal when detecting a vehicle. When receiving the ID request signal via the communication device 6, the control unit 16 of the navigation device transmits a preset ID code via the communication device 6. Further, the control unit 16 determines that the vehicle has entered the highway based on a signal from the automatic toll clearing machine, and performs map matching of the current position of the vehicle detected by the GPS receiver 4 and the self-contained navigation sensor 5 on the highway. .

When a vehicle passes the exit of a highway,
The automatic fare clearing machine located at the exit of the expressway transmits an ID request signal. Upon receiving this ID request signal, the control unit 16 of the navigation device transmits the vehicle ID code via the communication device 6. The automatic fare clearing machine uses the vehicle ID
When the code is received, a signal indicating the toll is output. Upon receiving this signal, the control unit 16 of the navigation device displays the toll on the display device 7, and
When it is determined that the vehicle has entered the general road from the highway, the map matching to the highway is stopped, and the map matching to the general road is started.

In this embodiment, the same effects as in the first embodiment can be obtained. In addition, if such a system is adopted for all expressways, it is possible to reliably determine whether the vehicle is traveling on an expressway or a general road, and to make a mistake. Providing guidance information is reliably prevented.

[0028]

As described above, according to the on-vehicle navigation device of the present invention, there is provided a highway entry detecting means such as a card reader for reading data from a traffic card, and the vehicle is provided by the highway entry detecting means. When the control unit detects that the vehicle has entered the highway, the control unit corrects the current position of the vehicle detected by the vehicle position detecting means so that the vehicle is located on the highway, so that the vehicle is traveling on the highway. Regardless, it is possible to avoid a problem that the current position of the vehicle is map-matched to a general road to provide incorrect guidance information.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a vehicle-mounted navigation device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a card reader of the vehicle-mounted navigation device.

FIG. 3 is a diagram showing a display example of a traffic history of an expressway.

FIG. 4 is a block diagram showing a vehicle-mounted navigation device according to a second embodiment of the present invention.

FIG. 5 is a schematic diagram showing an automatic fee settlement system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CD-ROM 2 Operation part 3 Card reader 4 GPS receiver 5 Self-contained navigation sensor 6 Communication device 7 Display device 10 Navigation device main body 11 Buffer memory 12-15, 26 Interface 17 Map drawing part 18 VRAM 19 Reading part 20 Guidance route storage Unit 21 guide route drawing unit 22 operation screen generation unit 23 various mark generation units 24 image synthesis unit

Continued on the front page (72) Inventor Ryoji Gamo 1-1-8, Nishigotanda, Shinagawa-ku, Tokyo Alpine Co., Ltd. (72) Inventor Manabu Goto 1-1-8, Nishigotanda, Shinagawa-ku, Tokyo Alpine Inside (72) Inventor Motohiro Yoshino Alpine, Inc. 1-1-8 Nishigotanda, Shinagawa-ku, Tokyo Alpine Incorporated (72) Inventor Tsuyoshi Yoshida 1-1-18 Nishigotanda, Shinagawa-ku, Tokyo Alpine shares Inside the company (72) Inventor Kazu Aizawa Alpine Co., Ltd.

Claims (5)

[Claims] 1. A display means capable of displaying a map image, a map data storage means storing map data, a vehicle position detection means detecting a current position of a vehicle, and a high speed detecting a vehicle entering an expressway. A road entry detecting means, and a control means for reading map data around a current position of the vehicle detected by the vehicle position detecting means from the map data storing means and drawing a map image on the display means, The means, when detecting that the vehicle has entered the highway by the highway entry detecting means, performs map matching on the current position of the vehicle detected by the vehicle position detecting means so that the vehicle is located on the highway. A featured in-vehicle navigation device. 2. The in-vehicle navigation device according to claim 1, wherein said highway entry detection means is a device into which a traffic card passed at the entrance of the highway is inserted. 3. The highway entry detecting means is a card reader for reading data recorded on the traffic card and outputting the data to the control means.
2. The in-vehicle navigation device according to claim 1. 4. The controller according to claim 3, wherein the controller records a date and time when the vehicle entered the highway and a section in which the vehicle traveled, based on a signal output from the card reader.
2. The in-vehicle navigation device according to claim 1. 5. The on-vehicle vehicle according to claim 1, wherein the highway entry detecting means is a communication device for communicating with an automatic toll adjusting machine installed at an entrance and an exit of the highway. Navigation device.