JP2005257645A - Navigation system, method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation system, a method, and a program for further effectively improving comfort and safety of driving, even when there is one-way traffic. <P>SOLUTION: A detecting part 45 detects an entry to and an exit from a one-way road by collating the detected location of own vehicle with road map data. An announcing part 46 announces the detected entry to and the detected exist from the one-way road by voice output and a screen display. In other words, in the case that the own vehicle has entered a different road section and that the detecting part 45 has detected that the own vehicle has started to travel in a one-way road, while it had been traveling in a two-way traffic road till then; the announcing part 46 performs guidance by indicating the entry by announcing, "This is one-way traffic from here. Drive carefully." by synthetic voice etc. The announcing part 46 performs guidance by indicating the exit by announcing, "A two-way traffic starts here. Drive carefully regarding oncoming vehicles." in the case that the detecting part 45 has detected that the own vehicle has exited from a one-way road to a two-way traffic road. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a navigation device, method, and program for more effectively improving driving comfort and safety even when there is a one-way street.

  In recent years, with the advancement of digital technology, the spread of navigation devices is remarkable, but its basic function is road map data that pre-stores the position of the vehicle that is detected using navigation data provided by sensors such as GPS and gyroscopes. To display on the surrounding map. In many cases, the road map data is used to search for an optimum route to a designated destination and to output guidance guidance such as a traveling direction along the route.

As a function of the navigation device as described above, the user can visually recognize that the vehicle is traveling on a one-way road by changing the color of the one-way mark near the vehicle mark on the map. There is also a proposal (for example, Patent Document 1).
JP 2002-340590

  However, there is a problem that it is difficult for the user to notice only with a visual screen display as in the prior art, and in particular, since the display screen is originally not watched during driving, there is another inconvenience that it is difficult to notice a one-way path. The user is unaware of the one-way street, for example, misunderstood it as a one-way street with a wide width and leans too far to the left, or on the other hand, runs on a one-way street (including two lines) for a long time In addition, it is desirable to further improve driving comfort and safety by preventing the situation in which the driver misunderstands a one-way street and travels in the opposite lane despite a two-way street.

  The present invention solves the problems of the prior art as described above, and an object of the present invention is to provide a navigation device, method, and program for further effectively improving driving comfort and safety even when there is a one-way street. Is to provide.

  In order to achieve the above object, a vehicle-mounted navigation device according to claim 1 is provided with means for storing and reading road map data including information on whether each road section is one-way or not, and navigation provided from sensors. Means for detecting the vehicle position using data; means for displaying the detected vehicle position on a surrounding map based on the road map data; and the detected vehicle position and the road map data. The computer realizes means for detecting the entry and exit of a one-way path and means for notifying the detected entry and exit of the one-way path at least by voice output by collation.

  The navigation method of claim 2 captures the invention of claim 1 from the viewpoint of a method, and stores road map data including information on whether each road section is a one-way road in advance and provides it from sensors. A process for detecting the vehicle position using the navigation data to be detected, a process for displaying the detected vehicle position on a surrounding map based on the road map data, and the detected vehicle position and the road map The computer executes a process of detecting entry and exit of a one-way path by collation with data and a process of notifying at least voice output of the detected entry and exit of the one-way path.

  The navigation program of claim 3 captures the inventions of claims 1 and 2 from the viewpoint of a computer program, and controls a computer that prestores road map data including information on whether each road section is a one-way street. Thus, the vehicle position is detected using the navigation data provided by the sensors, the detected vehicle position is displayed on the surrounding map on the basis of the road map data, and the detected vehicle position and By comparing with the road map data, entry and exit of a one-way path are detected, and the detected entry and exit of the one-way path are notified at least by voice output.

  In the present invention, it is detected that a normal one-way path is entered into a one-way path, or a transition from a one-way path to a one-way path is detected, and that is also voiced to alert the user to drive. Comfort and safety can be improved more effectively.

Next, an in-vehicle navigation device (referred to as “this device”), which is the best mode for carrying out the present invention, will be described with reference to the drawings.
[1. Constitution〕
This apparatus includes each element shown in FIG. Among these, the absolute position / azimuth detector 1 using a GPS antenna / receiver, the relative azimuth detector 2 using a gyro, etc., and the vehicle speed detector 3 for processing vehicle speed pulses are the position of the vehicle, Sensors that provide navigation data to determine speed, direction, etc. The main CPU and its peripheral circuit (referred to as “CPU”) 4 use the memory group M as means for controlling the entire apparatus. A memory group M includes a ROM 5 that stores basic programs such as BIOS and startup routines, a dynamic RAM (DRAM) 6 for program areas and work areas, a static RAM (SRAM) 7 that backs up memory contents while the power is turned off, and a display. A video RAM (VRAM) 8 for the unit 10 is included.

  In addition, the apparatus includes a display unit 10 such as a liquid crystal panel for displaying information such as a map and a menu, and an input unit 11 such as various switches for inputting information, for the CPU 4 to use via the user interface unit 9. .

  The CD-ROM control unit 12 is means for reading road map data including information on whether or not each road section is a one-way street from a set medium such as a system CD-ROM. The FM multiplex broadcast reception and processing unit 13 is a part for extracting data such as VICS from the FM broadcast wave, and the voice synthesis unit 14 synthesizes a voice signal based on a phrase ID or a character string specified by the CPU 4. It is means for outputting from the speaker SP.

  Further, the CPU 4 realizes each functional element shown in FIG. 1 by processing according to the program, and each functional element functions as means for performing the following functions by using the above-described parts.

[2. Action)
First, the current position calculation unit 40 detects the vehicle position by calculation using the navigation data provided from the sensors (1 to 3), and the drawing unit 44 displays the detected vehicle position as a CD-ROM. Based on the road map data read from the control unit 12, the screen is displayed on the surrounding map displayed on the display unit 10. When the destination designation unit 41 receives designation of a destination by facility search or cursor designation on a map, the route search unit 42 selects an optimum route from the current location to the destination based on the road map data. Search and set by a predetermined search algorithm such as bidirectional search, and the guide unit 43 displays guidance guidance such as a traveling direction along the route on the screen through the drawing unit 44, synthesized speech through the voice synthesis unit 14, and the like. To output.

  When the vehicle enters a different road section due to a left or right turn or the like, as shown in the flowchart of FIG. 2, the detection unit 45 compares the detected vehicle position with the road map data to detect a one-way road. The entry and exit are detected, and the notification unit 46 notifies the detected entry and exit of the one-way path by voice output using the voice synthesis unit 14 and the speaker SP and a screen display on the display unit 10. That is, when the own vehicle enters a different road section, the detection unit 45 detects that the vehicle has been traveling on a face-to-face road (step 1) and has started to travel on a one-way road (step 2). ), The informing unit 46 gives guidance to that effect by means of synthetic voice, such as “From here, it is one-way. Please drive carefully” (step 3). On the other hand, when the detection unit 45 detects that the vehicle exits from the one-way road (step 4) to the face-to-face road (step 5), the notification section 46 informs that effect by “synthetic voice from here”. Please drive with caution for oncoming vehicles ”(step 6).

  For example, the example shown in FIG. 3 is an intersection of a two-way street and a one-way street, and one of the four directions is prohibited from entering. When turning right as indicated by a thick arrow at this intersection, it means that the vehicle has entered a different road section, so the detection unit 45 and the notification unit 46 perform the processing of the flowchart of FIG. That is, the detection unit 45 determines that the vehicle has started to travel on the one-way road including the position (i) following the determination that the vehicle is traveling on the facing road including the position (step 1) (step 1). 2) Guidance is given that the vehicle has started running on a one-way street (step 3)

  The discrimination between the two-way street and the one-way street is made by referring to the data of each road link representing each road section and constituting the road map data, along with the traffic regulation associated with each link together with the route search information such as the required time. What is necessary is just to carry out with reference to the information of a driving possible direction.

[3. effect〕
In the present embodiment as described above, it is detected that a normal one-way path is entered into a one-way path, or that a one-way path is changed to a one-way path, and that is also voiced to alert the user. By prompting, driving comfort and safety can be improved more effectively.

[4. Other embodiments]
In addition, this invention is not limited to the said embodiment, Other embodiments which are illustrated below are also included. For example, the present invention can be grasped not only as a device category but also as a method and a program. In addition to the CD-ROM, a storage medium such as a DVD-ROM or HDD (hard disk drive) can be used. For example, the FM multiplex broadcast reception and processing unit 13 may be omitted.

The functional block diagram which shows the structure of embodiment of this invention. The flowchart which shows an example of the process sequence in embodiment of this invention. The conceptual diagram which shows an example of the intersection in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Absolute position and direction detection part 2 ... Relative direction detection part 3 ... Vehicle speed detection part 4 ... Main CPU and its peripheral circuit M ... Memory 5 ... ROM
6. Dynamic RAM (DRAM)
7. Static RAM (SRAM)
8 ... Video RAM (VRAM)
DESCRIPTION OF SYMBOLS 9 ... User interface 10 ... Display part 11 ... Input part 12 ... CD-ROM control part 13 ... FM multiplex broadcast reception and processing part 14 ... Speech synthesis part SP ... Speaker 41 ... Destination designation part 42 ... Route search part 43 ... Guidance Unit 44 ... Drawing unit 45 ... Detection unit 46 ... Notification unit

Claims (3)

Means for preliminarily storing and reading road map data including information on whether each road section is a one-way street;
Means for detecting the vehicle position using the navigation data provided by the sensors;
Means for displaying the detected vehicle position on a screen based on the road map data on a surrounding map;
Means for detecting entry and exit of a one-way street by comparing the detected vehicle position with the road map data;
Means for notifying at least audio output of the detected entry and exit of the one-way path;
A vehicle-mounted navigation device characterized in that a computer is realized. Road map data including information on whether each road section is a one-way street is stored in advance,
A process of detecting the vehicle position using the navigation data provided by the sensors;
A process for displaying the detected vehicle position on a map based on the road map data;
A process of detecting entry and exit of a one-way road by comparing the detected vehicle position with the road map data;
A process of notifying at least voice output of the entry and exit of the detected one-way path;
A navigation method characterized in that the computer executes. By controlling a computer that stores in advance road map data including information on whether each road section is a one-way street,
Use the navigation data provided by the sensors to detect your vehicle position,
The detected vehicle position is displayed on a screen on a surrounding map based on the road map data,
By comparing the detected vehicle position with the road map data, the entry and exit of a one-way street is detected,
Informing the detected entry and exit of the one-way path at least by voice output,
A navigation program characterized by that.

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