KR100562087B1 - Method for guiding danger area using an oval equations and system thereof - Google Patents

Abstract

The present invention relates to a method and system for guiding a dangerous area of a GPS system using an elliptic equation. The present invention relates to a method and system for detecting a suitable dangerous area by searching a dangerous area coordinate database (DB) using a GPS signal. The method and system according to the present invention employs an algorithm for guiding dangerous areas of a system, such as a car navigation system and a dangerous area detector, which can guide a dangerous area using only two position data. By using two focal lengths and long axis lengths, only a small amount of data can be used, reducing the storage capacity and allowing hazardous area warnings to be made within a specific area rather than location criteria.

GPS, Hazardous Area, Detection, Detection, Ellipse

Description

Hazardous Area Guidance using Elliptic Equation and its System {METHOD FOR GUIDING DANGER AREA USING AN OVAL EQUATIONS AND SYSTEM THEREOF}

1 and 2 is a schematic diagram showing a danger zone guidance method of the existing GPS system.

Figure 3 is a block diagram showing the configuration of a GPS system that can implement the dangerous area guide method according to an embodiment of the present invention.

4 and 5 is a schematic view for explaining a dangerous zone guide method according to an embodiment of the present invention.

<Brief description of the main parts of the drawing>

100: hazardous area

110: primary warning position

115: secondary warning position

120: secondary warning area

210: primary middle region

220: secondary intermediate region

400: slope of the danger zone

The present invention searches a dangerous area coordinate database (DB) using a GPS signal and warns a driver if there is a dangerous area in the direction in which the vehicle is currently traveling, for example a car navigation system or a dangerous area detector. More specifically, the present invention relates to a dangerous zone guidance method and a system in which the dangerous zone guidance algorithm is configured to use the lengths of two focal points and long axes of an elliptic equation.

In general, the vehicle navigation apparatus includes an electronic numerical map, a GPS system, etc. in a terminal installed in a vehicle, and receives a current position from a GPS satellite, detects the position of a driving vehicle based on the current position, and detects the current position of the driver on the electronic map. It is a device that displays the location and guides the way such as the shortest path according to the road conditions. In addition, the vehicle navigation system includes a function of warning the driver through a voice when approaching a dangerous area such as a sharp curve area, a traffic accident bunch area, a fog area, and a speeding location on the road.

This dangerous zone warning is obtained by receiving a GPS satellite signal and comparing the current position with the DB in a state in which the coordinate DB of the dangerous zone is pre-stored in a storage device in the GPS system.

1 and 2 show a conventional hazard warning system.

1 illustrates a conventional danger zone warning method using two location data. In this method, the first danger zone warning location 110 and the danger zone location 100 are entered into a storage device in the system as a DB. The first danger zone warning location 110 arbitrarily designates a distance (eg, 1 km or 500 m) away from the danger zone location 100 in the direction of the vehicle where the driver can be warned of and respond to the danger. do. When the vehicle passes the first danger zone warning location 110, the GPS system in the vehicle matches the current location of the vehicle based on the data received from the GPS satellites and the primary warning location 110 in the DB, where Alerts the driver via voice, etc. that there is a danger zone in the vehicle. By the way, this method only warns only in the first danger zone warning location 110, the vehicle entered in the middle region 210 between the first danger zone warning location 110 and the danger zone location 100. There was a problem that there was no warning.

Therefore, in the past, there has been an effort to improve the warning method of the danger zone of the single warning system, so that two or more warnings are possible in the case of a serious hazard in operation. For example, as shown in Figure 2, by designating the first danger zone warning location 110 and the second danger zone warning location 115 in front of the danger zone location 100, using the three location data The manner by which warnings are made is known. In this manner, a warning guidance is given to a vehicle entering the primary intermediate region 210 between the primary warning position 110 and the secondary warning position 115 when passing through the secondary warning position 115. However, there is still a problem that the vehicle is not guided to the danger zone in the case of the vehicle entering the secondary intermediate region 220 between the second warning location 115 and the danger zone 100. Furthermore, in the case of the method of FIG. 2, since three location data must be used, the capacity of the storage device in the system increases and the processing burden increases.

By improving such a conventional position reference warning method, for example, the registration publication of the Republic of Korea Patent Application No. 10-2005-0030513 (patent owner: Jati Electronics Co., Ltd.) "Dangerous zone guidance system and method using GPS", the area not the point coordinates A technology that allows two or more warnings to be issued is disclosed. This technique uses a zone detection processor module that creates a boundary using a vertex and slope of an area to set a hazardous area. Specifically, a "area consisting of four straight lines" (ie, a rectangular area) is set up. do. The area set in this way can be set in front of the danger area in two areas, and when there is a vehicle in each area, warning guidance can be made, so that at least one warning is given to vehicles entering in front of the danger area. The advantage is that guidance can be made. However, in this technology, since each boundary must be calculated using a straight line and a circle equation in order to calculate a boundary consisting of four straight lines, there is a problem in that the processing burden on the system processor is high.

Therefore, the number of data required for the calculation of the danger zone warning can be reduced, and the calculation method using this data can be simplified, so that the capacity of the system storage device can be reduced and the processing burden on the system processor can be reduced. There is still a need for new hazardous area warnings.

The present invention has been made to solve the problems of the conventional dangerous zone guidance system, and the dangerous zone guidance algorithm is used to guide the dangerous zone using only two position data, using two focal lengths of the elliptic equation and the length of the long axis. In this configuration, only a small amount of data can be used, thereby reducing the capacity of the storage device, and reducing the processing burden of the system processor by simplifying the hazardous area guidance algorithm.

This object is achieved by a hazardous area guidance system and method using an elliptic equation provided in accordance with the present invention. The present system is a danger zone guidance system for guiding a danger zone existing in front, and includes: a data storage unit 350 for storing a danger zone location and a primary warning location in front of the danger zone location; A GPS module unit for receiving a GPS satellite signal and calculating a position of a vehicle currently driving; When the calculated current position exists in an elliptical warning area having the primary warning location and the dangerous area location as two focal points, it may include a central processing unit for controlling the warning guidance to indicate the existence of the dangerous area at least once. .

According to a preferred embodiment, the central processing unit, the sum of the distance from the current location to the first danger zone warning location and the distance from the current location to the danger zone location is less than the long axis length of the elliptical warning zone. If it is equal to or equal to 1, it is determined that the vehicle is within the elliptical warning area.

According to a preferred embodiment, the central processing unit may be configured to compare the slope between the dangerous area position and the primary warning position and the current driving direction, and output a warning guide voice according to the comparison result.

The method according to the present invention is a danger zone guidance method for guiding a danger zone existing in front of the danger zone, the danger zone location, the first warning location in front of the danger zone location, the danger zone location and the first warning location. Storing gradient data therebetween; Receiving a GPS satellite signal to calculate a location of a vehicle currently driving; Determining whether the calculated current position exists in an elliptical warning area having both the primary warning location and the dangerous area location as two focal points; If it is determined that the presence of the dangerous area may include a guide step for controlling the warning to be made at least once.

Here, the determining step includes: whether the sum of the distance from the current position to the first danger zone warning position and the distance from the current position to the danger zone position is less than or equal to the length of the major axis of the elliptical warning zone. Determining; If less than or equal to, preferably comprising comparing the slope between the danger zone location 100 and the primary warning location and the current direction of travel of the vehicle.

Hereinafter, with reference to the accompanying drawings will be described in detail the specific configuration and features of the present invention.

Dangerous zone guidance system and method using an elliptic equation provided in accordance with the present invention can be implemented by a GPS system (Global Positioning System) having a configuration as shown in FIG.

The illustrated GPS system may include a GPS module 300, an input unit 310, a central processing unit 320, a display unit 330, a voice output unit 340, and a data storage unit 350. The GPS module 300 receives a signal from a GPS satellite as a core of a GPS system and calculates a location of a vehicle currently being driven. The input unit 310 is a portion where a character or a command is input by a user, such as a keypad, a button, a touch pad, or a microphone. The display unit 330 visually displays various information such as an electronic map, a vehicle speed, a system menu, and the like, and may be, for example, an LED and / or an LCD display. The voice output unit 340 may include a speaker, a voice synthesizer, and the like as a portion for outputting a warning zone warning message, a road guide comment, and other voice and sound. The data storage unit 350 may store data such as an electronic map, a voice announcement, a danger zone location, a warning location, and the like. Finally, the central processing unit 310 is a control unit for controlling the functions of each part of the GPS system.

The danger zone guidance system according to the present invention may be implemented by the GPS system shown in FIG. 3, for example, a sharp curve area, a fog area, an accident area that is mounted on a vehicle and is present in front of a road currently being driven to a driver. It is a system to inform in advance the location of dangerous areas such as speeding and speeding zones.

In particular, according to the present system, two data of the danger zone location 100 and the first warning location 110 in front of the danger zone location are stored in the data storage unit 350. Then, when the position of the vehicle currently being driven according to the GPS satellite signal is calculated from the GPS module, the calculated current position exists in an elliptical warning area having the primary warning position 110 and the danger zone position 100 as two focal points. It is determined whether or not.

The elliptical warning zone is shown as the secondary hazard zone warning zone 120 of FIG. 4. According to the present invention, when the vehicle passes the first danger zone warning location 110 along the road, the vehicle may be not only guided to the danger zone 100 present in front of the vehicle, but also the first danger zone warning location 110. Even if the vehicle enters the middle area 210 between the dangerous area 100 and the dangerous area 100, the first dangerous area warning location 110 and the dangerous area 100 are in the elliptical warning area with two focal points. It is provided with the advantage that can be guided for the existence of the danger zone (100).

On the other hand, when the vehicle enters the elliptical warning area 120 between the primary warning location 110 and the danger zone 100, for example, when entering the intersection, the vehicle does not proceed to the danger zone 100 but in the other direction. If you proceed, you will not need guidance from the hazardous area. Therefore, in the case of a vehicle entering the elliptical warning region 120 without passing through the first warning position 110, it is necessary to determine whether to proceed to the danger zone 100. The driving direction of the vehicle may be determined in a conventional manner by the GPS module 300. The direction of travel and the slope 400 of the vehicle thus determined may be compared. The slope 400 is a vector value having a straight line distance between the danger zone location 100 and the primary warning location 110 and toward the danger zone from the primary warning location 110.

In particular, according to the present invention, the sum of the distance from the current location of the vehicle to the first danger zone warning location 110 and the distance from the current location to the danger zone location 100 is the long axis of the elliptical warning zone. If less than or equal to the length, the hazardous area can be guided.

This feature will be described in detail with reference to FIG. 5 as follows. First, assume that the distance between the first danger zone warning location 110 and the danger zone 100 is 500 m. This distance can be arbitrarily determined. In general, the distance can be determined in consideration of the safe braking distance of the vehicle and the time required to recognize the danger zone when the vehicle is traveling at a high speed of 80 km or more. On the other hand, it is assumed that the length of the short axis of the ellipse is 120m. The length of the short axis can also be arbitrarily determined. For example, in consideration of the general width of the one way lane, it is desirable to determine that the ellipse warning area can include both the width of the one way lane and the area of the danger zone.

As shown in FIG. 5, the half 510 of the distance between the danger area (focus) and the primary warning position (focus), that is, the distance between the focus points (focal length) is set as the bottom side, and half of the elliptic shortening (520). Assuming a right triangle with height), a right triangle with a base of 250m and a height of 60m is created. The length of the hypotenuse 530 of the right triangle corresponds to half of the length of the long axis of the ellipse, and can be obtained by Pythagorean theorem (the square of the hypotenuse equals the sum of the squares of the other two sides).

Hypotenuse ² = base ² + height ²

= 250 ² + 60 ²

Therefore, the hypotenuse = (250 ² + 60 ² ) ^1/2

             = 257.099 ......

Thus, the major axis of the ellipse = hypotenuse x 2 = 514 m.

As discussed above, once the two foci (ie, primary warning and hazardous location) are determined, the length of the major axis of the ellipse is easily determined by simple calculations. This calculation may be performed in the central processing unit 320 based on the data stored in the data storage unit 350.

The present invention utilizes the definition of an ellipse (a set of points where the sum of distances from two points, ie, two focal points, are equal). That is, if the sum of the current vehicle position and the distance between the two focal points of the primary warning position 110 and the dangerous area position 100 is less than or equal to the long axis length value of the ellipse, the current vehicle is located inside the ellipse. It can be determined to exist. Then additionally or alternatively, it may further be determined whether the direction of travel of the vehicle thus determined to be inside the ellipse is equal to the slope 400. If affirmative, a warning notice may be given at least once informing the presence of the hazardous area.

In the above, specific examples of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the illustrated and illustrated examples. Those skilled in the art will appreciate that various modifications and variations can be made within the scope of the following claims in light of the teachings of the present invention. Therefore, it is pointed out that the scope of the present invention should be defined by the claims.

As described above, the dangerous zone guidance system and method using the elliptic equation according to the present invention, the dangerous zone guidance algorithm, to guide the dangerous zone using only two position data, the two focus and long axis of the elliptic equation By using the length, it is possible to use only a small amount of data, thereby reducing the capacity of the storage device, and reducing the processing burden of the system processor by simplifying the hazardous area guidance algorithm.

Claims (5)

Hazardous area guidance system that guides the danger area in front of A danger zone location (100), a data storage unit (350) for storing a primary warning location (110) in front of the danger zone location; A GPS module unit 300 for receiving a GPS satellite signal and calculating a position of a vehicle currently driving; When the calculated current position exists in the elliptical warning area having the primary warning location 110 and the dangerous area location 100 as two focal points, a center for controlling at least once to provide a warning guidance indicating the existence of the dangerous area. Processor 320 Dangerous zone guidance system using an elliptic equation, characterized in that it comprises. The method of claim 1, wherein the central processing unit 320, the sum of the distance from the current location to the first danger zone warning location 110 and the distance from the current location to the danger zone location 100. And when the length is less than or equal to the long axis length of the elliptical warning area, the vehicle is determined to exist in the elliptical warning area. According to claim 1, wherein the central processing unit 320, comparing the slope 400 between the danger zone location 100 and the primary warning location 110 and the current vehicle direction, and the comparison result Danger zone guidance system using an elliptic equation, characterized in that the control to output a warning guidance voice according. Hazardous area guidance method for guiding the danger area in front of Storing the danger zone location 100, the first warning location 110 in front of the danger location, the slope 400 data between the danger location 100 and the first warning location 110. Wow; Receiving a GPS satellite signal to calculate a location of a vehicle currently driving; Determining whether the calculated current position exists in an elliptical warning area having both the primary warning location (110) and the dangerous area location (100) as two focal points; And if it is determined that there is a warning step of at least one warning notice indicating the existence of the dangerous area, Dangerous area guidance method using an elliptic equation, characterized in that it comprises. The method of claim 4, wherein the determining step is: It is determined whether the sum of the distance from the current location to the first danger zone warning location 110 and the distance from the current location to the danger zone location 100 is less than or equal to the long axis length of the elliptical warning zone. Making a step; Comparing the slope 400 between the danger zone location 100 and the primary warning location 110 with the direction of travel of the current vehicle, Dangerous area guidance method using an elliptic equation, characterized in that it comprises.

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