KR20130123712A - Navigation for the prevention of vehicle rollover in curves and mothod thereof - Google Patents

Abstract

The present invention relates to a navigation device for preventing vehicles from overturning in a curved road and a method thereof. The navigation device according to the present invention informs the detected speed limit information to a driver after detecting the limit speed in which the vehicles are not overturned according to the curvation degree when the predetermined front of the driving vehicles is a curved road. Accordingly, the vehicles can be prevented from overturning caused by the speeding in the curved road. [Reference numerals] (100) Location reception unit;(200) Display unit;(300) Audio output unit;(400) Storage unit;(500) Control unit

Description

Navigation apparatus and method for preventing vehicle overturning on a curved road {Navigation for the prevention of vehicle rollover in curves and mothod}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device for a vehicle, and more particularly to a navigation device capable of assisting safe driving on a curved road.

Navigation systems for route guidance of vehicles and the like are widely used to cope with complicated road conditions to achieve safe driving of drivers. The navigation system incorporates a Global Positioning System (GPS) receiver and stores updatable road information data. The navigation system detects the current position of the vehicle from the satellite signal received through the GPS receiver and guides the route to the destination using the pre-stored road information data and the current position of the vehicle.

In addition to the basic role of navigating the route to the destination, the navigation system also assists in driving safely on the curve. To this end, the map data maker measures the curvature of the road in advance, and if the curvature is greater than or equal to a certain value, the map data manufacturer determines the curve length and records information about the curve length in the storage medium of the navigation system as auxiliary information of the map data. And a navigation system with curve road information like this has a curve road ahead when the vehicle reaches the curve road. Please drive the driver's attention by outputting a voice message such as “Please drive carefully” or a guide message on the screen. However, since the conventional navigation system merely provides a driver with information about the presence or absence of a curved road, the driver has no choice but to estimate the safe driving speed of the vehicle on the curved road. Therefore, if the driver misinforms and speeds beyond the speed limit on the curve, the vehicle may roll over.

An object of the present invention is to provide an improved technical solution that can prevent the overturning accident caused by the speed of the vehicle in the curve road in advance.

According to an aspect of the present invention, there is provided a navigation apparatus for preventing vehicle overturning on a curved road, using a storage unit in which shape data of a road is stored, and the stored shape data for a road ahead of a driving vehicle. And a controller for identifying a curve section in which a risk of overturning occurs, and informing the driver of the speed limit information in the identified curve section. The controller sequentially obtains a radius of curvature of each of the interpolation points that are the shape data, grasps a start point and an end point of the curve section based on the obtained result, and calculates a radius of curvature of the interpolation point that is sequentially obtained. The first interpolation point having a radius of curvature shorter than the first radius is identified as the starting point by comparing one radius, and the radius of curvature and the second radius of the interpolation point sequentially obtained after the starting point of the curve section are compared. The first interpolation point having a radius of curvature longer than the second radius is identified as the end point. In addition, the speed limit information for each radius of curvature is further stored in the storage, and the controller reads the speed limit information corresponding to the minimum radius of curvature of the curvature radii in the curve section from the upper limb storage to notify the driver.

On the other hand, the vehicle overturn generation prevention method in the curve road according to an aspect of the present invention for achieving the above-described problem by using the shape data stored in the storage unit with respect to the road ahead of the driving vehicle curve section that is the risk of overturning Determining, and informing the driver of the speed limit information in the identified curve section. The step of identifying the curve section may be obtained by sequentially obtaining a radius of curvature of each of the interpolation points of the shape data, comparing the curvature radius of the sequentially interpolated point and the first radius to obtain a curvature radius shorter than the first radius. Identifying the first interpolation point having a start point of the curve section, and comparing the curvature radius and the second radius of the interpolation point sequentially obtained after the start point of the curve section to have a curvature longer than the second radius. Identifying an initial interpolation point having a radius as an end point of the curve section, and notifying the driver of the speed limit information includes: the speed limit information corresponding to the minimum curvature radius among curvature radii in the curve section; Read from the storage to inform the driver.

The navigation device and method according to the present invention identify the curve section in front of the vehicle and inform the driver of the speed limit information corresponding to the curve degree of the identified curve section, thereby preventing the vehicle overturning accident due to the wrong decision of the driver. Create an effect that prevents

1 is a block diagram of a navigation device for preventing vehicle overturning in a curve road according to an embodiment of the present invention.
2 is a first reference diagram for explaining a vehicle overturn risk determination in a curve road according to the present invention.
3 is a second reference diagram for explaining a vehicle overturn risk determination in a curve road according to the present invention.
4 is a flowchart illustrating a method for preventing vehicle overturning in a curve road according to an embodiment of the present invention.
5 is a flowchart illustrating a method of identifying a curve section in which a vehicle overturning risk occurs.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing and further aspects of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. Hereinafter, the present invention will be described in detail to enable those skilled in the art to easily understand and reproduce the present invention.

1 is a block diagram of a navigation device for preventing vehicle overturning in a curve road according to an embodiment of the present invention.

As shown, the navigation device includes a position receiving unit 100, a display unit 200, an audio output unit 300, a storage unit 400, and a control unit 500. The position receiving unit 100 is a component for acquiring position information of a vehicle and may be a global positioning system (GPS) module that receives position coordinate data from a GPS satellite. The display unit 200 is configured to display text, an image, and the like on a screen, and may be a liquid crystal display (LCD). The audio output unit 300 is for outputting audio to the outside, and includes an amplifier and a speaker. The storage unit 400 is a memory for storing data and may be a flash memory. The storage unit 400 stores map image data including road shape data. The shape of the road is two-dimensional linear with interpolation points, and the interpolation points have X and Y values indicating the position. In addition, the storage unit 400 further stores speed limit information for each curvature radius of the interpolation point. The speed limit information for each radius of curvature may be obtained through experiments for each vehicle model, and thus may vary for each vehicle model. The controller 500 is a controller for controlling the entire navigation device and performs a path search and guidance process. In addition, the controller 500 performs a process for preventing vehicle overturning in a curve section in front of the vehicle.

The controller 500 determines the location of the current driving vehicle through the position coordinate information received through the location receiver 100, and reads a map image of the area including the vehicle location from the storage 400. The control unit 500 reflects the map image read from the storage unit 400 and the current location coordinates of the vehicle received through the location receiving unit 100 on the map image and outputs it to the display unit 200. In one embodiment, the control unit 500 searches for the arrival path to the destination designated by the driver, and sets the found path as the guide path. The control unit 500 performs the route guidance by displaying the guidance route on the display unit 200 according to the current position of the vehicle identified through the position receiving unit 100.

During the route guidance, the controller 500 identifies a curve section in which a vehicle overturning risk occurs on the road in front of the vehicle. In detail, the controller 500 sequentially obtains a radius of curvature of each of the interpolation points, which are shape data of the road ahead of the vehicle, from the vehicle position. In an exemplary embodiment, as illustrated in FIG. 2, the control unit 500 obtains a radius of curvature of the interpolation points from the vehicle 10 in the order of interpolation points A to B, C, D, E, and F. As shown in FIG. 3, the radius of curvature of the circumscribed point B of the circumscribed circle of the triangle ABC formed by the interpolation point A and the interpolation point C contacting the interpolation point B and the interpolation point B is the radius of curvature of the interpolation point B, as shown in FIG. 3. to be. The control unit 500 determines the start point and the end point of the curve section in which the risk of vehicle overturning occurs using the radius of curvature of the interpolation points.

Specifically, the controller 500 recognizes the first interpolation point having a radius of curvature shorter than the first radius from the vehicle position as the start point of the curve section. When the interpolation point B of FIG. 2 is determined as the start point of the curve section, the controller 500 identifies the first interpolation point having a radius of curvature longer than the second radius among the interpolation points after the interpolation point B as the end point of the curve section. do. If the interpolation point E of FIG. 2 is found to be the end point of the curve section, the interpolation point B to the interpolation point E are curve sections in which the vehicle is overturned. Here, the first radius and the second radius may be the same or different, and are preset values for identifying the curve section. This value may be set through pre-overturn tests, virtual simulations, and the like.

When the curve section is identified, the control unit 500 warns the driver of the risk of overturning through the audio output unit 300. In addition, the controller 500 may output the speed limit information of the curve section to the display unit 200 and / or output audio. Here, the controller 500 reads the speed limit information corresponding to the minimum radius of curvature of the curvature radii of the interpolation points B, C, D, and E in the curve section from the storage 400 and provides the driver.

4 is a flowchart illustrating a method for preventing vehicle overturning in a curve road according to an embodiment of the present invention.

The controller 500 determines a curve section in which a vehicle overturning risk occurs in a predetermined front of the driving vehicle (S100). A method of identifying a curve section will be described later with reference to FIG. 5. If there is a curve section in front of the vehicle (S200), the controller 500 warns the driver that there is a risk of overturning through the audio output unit 300, and outputs the speed limit information of the curve section to the display unit 200. And / or outputs voice (S300). Thereafter, when the vehicle ends the driving, the control unit 500 ends the above-described operation (S400).

5 is a flowchart illustrating a method of identifying a curve section in which a vehicle overturning risk occurs.

The controller 500 sequentially obtains radii of curvature of the interpolation points, which are shape data of the road ahead of the vehicle, from the vehicle position (S110). In an embodiment, as shown in FIG. 2, the control unit 500 obtains a radius of curvature of the interpolation points in the order of interpolation points A to B, C, D, E, and F, which are close to the vehicle. As shown in FIG. 3, the radius of curvature of the circumscribed point B of the circumscribed circle of the triangle ABC formed by the interpolation point A and the interpolation point C contacting the interpolation point B and the interpolation point B is the radius of curvature of the interpolation point B, as shown in FIG. 3. to be. The controller 500 sequentially checks whether the obtained curvature radius is shorter than the first radius (S120), and first identifies an interpolation point having a curvature radius shorter than the first radius as the start point of the curve section (S130). Thereafter, the controller 500 obtains interpolation points after the start point of the curve section (S140). The controller 500 sequentially checks whether the obtained curvature radius is longer than the second radius (S150), and first identifies an interpolation point having a radius of curvature longer than the second radius as the end point of the curve section (S160). When the start point and the end point of the curve section are found, the controller 500 obtains the speed limit information corresponding to the minimum radius of curvature of the radius of curvature in the curve section from the storage 400 (S170).

So far I looked at the center of the preferred embodiment for the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

100: position receiving unit 200: display unit
300: audio output unit 400: storage unit
500:

Claims (8)

A storage unit in which shape data of a road is stored; And
A controller for identifying a curve section in which a risk of overturning occurs using the stored shape data of a road ahead of a traveling vehicle, and notifying a driver of the speed limit information in the identified curve section;
Navigation device for preventing the vehicle rollover occurs on the curve road comprising a. The method of claim 1,
The controller sequentially obtains a radius of curvature of each of the interpolation points, which are the shape data, and detects a start point and an end point of the curve section based on the obtained result. Navigation device for. 3. The method of claim 2,
The control unit compares the curvature radius of the interpolation point obtained sequentially and the first radius to identify the first interpolation point having a radius of curvature shorter than the first radius as the starting point. Navigation device to prevent overturning. The method of claim 3,
The controller compares the curvature radius of the interpolation point and the second radius sequentially obtained after the start point of the curve section to identify the first interpolation point having a radius of curvature longer than the second radius as the end point. Navigation device for preventing the vehicle overturning on a curved road. 5. The method according to any one of claims 2 to 4,
The storage unit further stores the speed limit information for each radius of curvature,
And the control unit reads the speed limit information corresponding to the minimum radius of curvature of the radius of curvature in the curve section from the upper limb storage to inform the driver. Identifying a curve section having a risk of overturning using shape data stored in a storage unit with respect to a road ahead of the traveling vehicle; And
Notifying the driver of the speed limit information in the identified curve section;
Vehicle overturn prevention method on the curve characterized in that it comprises a. The method of claim 6, wherein identifying the curve section comprises:
Sequentially obtaining a radius of curvature of each of the interpolation points that are the shape data;
Comparing the curvature radius of the interpolation point obtained sequentially with a first radius to identify a first interpolation point having a curvature radius shorter than the first radius as a start point of the curve section; And
Comparing the curvature radius of the interpolation point and the second radius, which are sequentially obtained after the start point of the curve section, to identify the first interpolation point having a curvature radius longer than the second radius as the end point of the curve section;
Vehicle overturn prevention method on the curve characterized in that it comprises a. The method of claim 7, wherein
The step of notifying the driver of the speed limit information includes: detecting the speed limit information corresponding to the minimum radius of curvature of the radius of curvature in the curve section from the storage unit and informing the driver of the vehicle overturn generation on the curve road. .

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