KR101584068B1 - LF antenna of the vehicle positioning system and method - Google Patents

Abstract

The present invention relates to a magnetic field strength acquiring step of acquiring magnetic field strengths output in X-axis, Y-axis and Z-axis directions of four LF antennas provided at a plurality of locations of a vehicle, The LF antenna is used to calculate the integrated magnetic field intensity for each of the four LF antennas. The LF antenna is used for calculating the magnetic field strength. The four LF antennas are used for magnetic field strength calculation. And a LF antenna mounting position estimating step of estimating an installation position in the vehicle for each of the four LF antennas through the position of the paw key sensed by the paw key position sensing step. To an LF antenna positioning system and method thereof.

Description

Field of the Invention [0001] The present invention relates to an LF antenna positioning system for a vehicle,

The present invention relates to a system and method for positioning an LF antenna of a vehicle, and more particularly, to a system and method for positioning an LF antenna of a vehicle in which no LF antenna among four LF antennas provided in a vehicle generates a shade area The present invention relates to a system and method for positioning an LF antenna of a vehicle that estimates installation positions of four LF antennas.

In general, a passive keyless entry system (PKE system) is a security system of a vehicle equipped to control opening and closing of a vehicle wirelessly at a position close to the driver or the owner of the vehicle, for unlocking and starting the door .

Herein, the PKE system searches the PKE system using the antenna when the user's Fob Key is located at a position adjacent to the vehicle, and wirelessly transmits the door of the vehicle when the Fob key is authenticated to the corresponding vehicle Or to perform control such as opening, closing, or starting.

That is, the user can control opening and closing of the door of the vehicle without intervention of the user by pressing the remote control by wireless, even if the user does not use a separate mechanical key.

The PKE system searches for an LF antenna (Low Frequency Antenna) as to whether the Paw key is inside or outside the vehicle to open, close, or start the door of the vehicle. Front, rear, left, right, etc. of the indoor and the outdoor.

The reason is that when the user carrying the Pawkey moves from the inside to the outside of the vehicle, the position of the Pawkey is normally sensed by using the LF antenna and the driving is performed accordingly When the user holding the fork key is detected from the outside of the vehicle but is gradually detected close to the vehicle, it is usually desired to open the vehicle, so that each door of the vehicle is opened according to the position of the fork key .

The LF antennas provided on the left, right, front, rear, and the like of the vehicle interior or exterior of the vehicle detect the respective pawl keys to not open all of the doors of the vehicle. Instead, the left front door, the left rear door, The right rear door, and the rear door (trunk) can be individually opened and closed.

The LF antenna provided in the left, right, front, rear, and the like of the interior or exterior of the vehicle senses the respective paw keys and does not open all of the doors of the vehicle. The left front door, the left rear door, , The right rear door, and the rear door can be individually opened and closed.

For this purpose, various designs are required depending on the location of the LF antenna or the area where the Paw key is sensed. In order to distinguish the sensing area, a plurality of LF antennas are required to be designed, .

Meanwhile, the LF antenna of the vehicle according to the related art has six LF antennas such as a front surface of the vehicle, a left front door, a right front door, a rear magnet center, a rear door (trunk) and a rear bumper.

However, when six LF antennas are provided as described above, the design cost of the LF antenna is increased. In order to drive the six LF antennas described above, circuit mounting is required as the number of LF antennas increases. The number of processes, costs, and the like are increased, thereby increasing the size and unit cost of parts.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a system and method for positioning an LF antenna of a vehicle.

By reducing the number of LF antennas in the vehicle from six to four, it reduces the volume, process count, cost, and minimizes errors that can occur in the shaded area. The purpose is to make it possible to do.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, in a system and method for positioning an LF antenna of a vehicle according to an embodiment of the present invention, A magnetic field intensity obtaining step for obtaining the magnetic field intensity to be outputted and a magnetic field intensity calculating step for each LF antenna calculating the integrated magnetic field intensity for each of the four LF antennas by applying the magnetic field intensity obtained by the magnetic field intensity obtaining step to the triangular function equation; Detecting a position of a pod key that wirelessly communicates with four LF antennas using the magnetic field strength calculated by the magnetic field strength calculation step for each of the LF antennas; And an LF antenna installation position estimating step of estimating installation positions in the vehicle for each of the four LF antennas through the position.

In order to determine whether the position of the Pawkey is inside or outside the vehicle, the magnetic field intensity acquiring step may include acquiring a magnetic field intensity for setting the magnetic field intensity output from each of the four LF antennas And further includes a setting step.

The detection of the position of the pawb key includes detecting the position of the pawb key by setting four sensing areas for each of the LF antennas by the magnetic field strength calculated by the magnetic field strength calculation step for each of the four LF antennas.

In addition, the sensing areas of the four LF antennas are formed to overlap each other.

The step of detecting the paw key position includes calculating distances from each of the four LF antennas to the paw key through the integrated magnetic field intensity for each of the four LF antennas calculated in the step of calculating the magnetic field strength for each of the four LF antennas .

In addition, when detecting the paw key position, when the paw key is located in a sensing area in which two or more paw keys are overlapped, the position of the paw key is detected using a combination of the magnetic field strength of each of the four LF antennas and the magnetic field strength of each of the four LF antennas. Lt; / RTI >

The step of calculating the LF antenna installation position may include calculating the installation positions of the four LF antennas so that the indoor and outdoor shaded areas of the vehicle in which the Pawkey is not detected are not generated by any LF antenna among the four LF antennas .

The step of calculating the LF antenna installation position includes calculating the height of the four LF antennas by calculating a point where the magnetic field intensity A reduced by the vehicle body and the magnetic field intensity B generated by the door window are similar.

Also, there are provided a Pawkey provided to open and close each door of a vehicle, four LF antennas provided at a plurality of positions of the vehicle, a data acquiring unit acquiring magnetic field strengths output for each of four LF antennas, To the triangular function formula to calculate integrated magnetic field intensity integrated for each of the four LF antennas, a sensing unit for sensing the position of the pawkey using the integrated magnetic field strength calculated by the data calculation unit, And a position calculating unit for calculating installation positions of the four LF antennas when the position of the pod keys is sensed without a shade area of indoor and outdoor.

The four LF antennas include a first LF antenna provided on the passenger seat door of the vehicle for sensing a paw key by emitting a signal to a first outside area of the vehicle and a first outside area of the vehicle, A second LF antenna for emitting a signal to a second sensing area inside the vehicle and sensing the pod key and a second sensing antenna for sensing a signal from a left side of the vehicle and a third sensing area inside the vehicle, And a fourth LF antenna provided on a trunk of the vehicle for detecting a paw key by transmitting a signal to a fourth sensing area inside the vehicle and a rear outside of the vehicle.

In addition, the first to fourth sensing areas where the first LF antenna to the fourth LF antenna sense the pawkey include those overlapping each other at at least two places.

Further, the data obtaining section includes obtaining magnetic field intensities in the X-axis, Y-axis, and Z-axis directions of each of the four LF antennas.

In addition, the magnetic field strength output for each of the four LF antennas includes outputting in consideration of the magnetic field strength of the four LF antennas, which are reduced by the vehicle body to determine whether the position of the Pawkey is inside or outside the vehicle.

In addition, when the Pod key is located in two or more overlapping areas in the first to fourth sensing areas, the sensing part uses a combination of the magnetic field strength of each of the four LF antennas and the magnetic field strength of each of the four LF antennas And detecting the position of the pawkey.

In addition, when determining the installation positions of the four LF antennas, the location calculation unit calculates a point where the magnetic field intensity A reduced by the vehicle body and the magnetic field strength B generated by the door window are similar to each other, And calculating the height.

The details of other embodiments are included in the detailed description and drawings.

The LF antenna positioning system and method of the vehicle of the present invention has one or more of the following effects.

First, it is possible to reduce the cost by reducing the number of LF antennas.

Second, by increasing the output of the LF antenna and widening the sensing area, the accurate position of the pawkey can be detected without a shadow area.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart illustrating an LF antenna positioning system for a vehicle according to the present invention.
2 is a plan view of an LF antenna positioning system of a vehicle according to the present invention.
3 is a plan view showing a sensing area of the LF antenna positioning system of the vehicle according to the present invention.
4 is a flowchart showing a method of positioning an LF antenna of a vehicle according to the present invention.
FIG. 5 is a conceptual diagram illustrating a method of setting the LF antenna height and a setting of an indoor / outdoor boundary of the vehicle according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings for explaining an LF antenna positioning system and method of a vehicle according to embodiments of the present invention.

A preferred vehicle LF antenna positioning system can be modified by a person skilled in the art, and in this embodiment is an LF antenna positioning system and method for a vehicle.

FIG. 1 is a flow chart showing a system for positioning an LF antenna of a vehicle according to the present invention, FIG. 2 is a plan view showing an LF antenna positioning system of a vehicle according to the present invention, Fig. 6 is a plan view showing a detection area of the setting system. Fig.

1 to 3, an LF antenna positioning system for a vehicle according to an embodiment of the present invention includes a Pawkey 10 provided to open and close each door of a vehicle 1, A data acquiring unit 60 and a data acquiring unit 60 for acquiring magnetic field intensity output for each of the four LF antennas 20, 30, 40 and 50 and the four LF antennas 20, 30, 40 and 50, A data calculation unit 70 for calculating the integrated magnetic field intensity integrated for each of the four LF antennas 20, 30, 40 and 50 by applying the magnetic field intensity obtained in the data calculation unit 70 to the triangular function formula, When detecting the position of the Pawkey 10 without the shade area of the vehicle 1 in the interior and the exterior of the vehicle 1 by the sensing unit 80 and the sensing unit 80 sensing the position of the Pawkey 10 using the magnetic field intensity, And a position calculating section 90 for calculating the mounting positions of the four LF antennas 20, 30, 40, and 50.

The Pawkey 10 is provided to open and close each door of the vehicle 1. [
The Pawkey 10 receives the Pawkey 10 confirmation request signal from at least one of the four LF antennas 20, 30, 40 and 50 or receives the Pawkey 10 ) Acknowledgment request signal. More specifically, the Pawkey 10 receives the Pawkey 10 confirmation request signal from at least one of the four LF antennas 20, 30, 40, and 50, And detects the position information of the LF antenna that transmits the confirmation request signal of the fork key 10. The magnetic field strength described above and the magnetic field intensity described later mean the received signal electric field strength (RSSI). Then, the POD key 10 may transmit to the data acquisition unit 60 a response signal including positional information of at least one LF antenna that transmitted the PODKEY 10 confirmation request signal and magnetic field strength.

The PoP key 10 measures the received signal electric field strength of the PoB key 10 confirmation request signal when it receives the PoB key 10 confirmation request signal from at least one of the four LF antennas 20, 30, 40, And detects and stores the position information of the four LF antennas 20, 30, 40, and 50 from the pawb key 10. Then, the pod key 10 transmits a response signal including the at least one LF antenna position information and the received signal electric field intensity to the data acquisition unit 60 with respect to the received pod key 10 confirmation request signal.

The four LF antennas 20, 30, 40, and 50 are provided at a plurality of locations in the vehicle 1 and are disposed at the center between the first LF antenna 20 provided in the passenger seat door of the vehicle and the passenger A third LF antenna 40 provided on the driver's door of the vehicle 1 and a fourth LF antenna 50 provided on the trunk of the vehicle 1.
The four LF antennas 20, 30, 40, and 50 may transmit a confirmation request signal to the Pawkey 10 to confirm presence of the Pawkey 10.

The first LF antenna 20 is provided on the passenger seat door of the vehicle 1 and is connected to the right outside of the vehicle 1 and the first sensing area 21 inside the vehicle 1, And senses the Pawkey 10.

The second LF antenna 30 is provided at the center between the passenger seat and the driver's seat of the vehicle 1 and sends a signal for confirming the Pawkey 10 to the second sensing area 31 inside the vehicle 1, (10).

The third LF antenna 40 is provided on the driver's seat door of the vehicle 1 and is connected to the left outside of the vehicle 1 and the third sensing area 41 inside the vehicle 1, And senses the Pawkey 10.

The fourth LF antenna 50 is provided in the trunk of the vehicle 1 and receives a signal for confirming the fork key 10 to the rear outside of the vehicle 1 and the fourth sensing area 51 inside the vehicle 1 And senses the Pawkey 10.

Herein, the first to fourth sensing areas 21 to 51, in which the first to fourth LF antennas 20 to 50 sense the pawkey 10, are arranged in at least two sensing areas They can overlap each other.
The data acquisition unit 60 may receive a response signal including the position information of the LF antenna and the magnetic field strength from the Pove key 10.

The data acquisition unit 60 acquires the respective magnetic field intensities of the four LF antennas 20, 30, 40, and 50 through the response signal received from the Pawkey 10. More specifically, it is preferable to obtain the magnetic field intensities in the X axis, Y axis, and Z axis directions of each of the four LF antennas 20, 30, 40, and 50.

The data calculation unit 70 calculates the integrated magnetic field strength in which the X axis, the Y axis, and the Z axis direction are integrated for each of the four LF antennas 20, 30, 40, and 50. More specifically, the integrated magnetic field intensity integrated for each of the four LF antennas 20, 30, 40, and 50 is calculated by applying the magnetic field intensity acquired by the data acquisition unit 60 to the trigonometric function.
The data calculation unit 70 can calculate the distance from each of the four LF antennas to the Pobkey 10 from the calculated integrated magnetic field strength.
The data calculating unit 70 calculates the distance between the four LF antennas 20 and 20 in consideration of the amount of change of the magnetic field intensity reduced by the vehicle body in order to determine whether the position of the Pawkey 10 is indoors or outdoors of the vehicle 1. [ , 30, 40, 50) can be set.

The sensing unit 80 senses the position of the Pod key 10 using the distance from the four LF antennas 20, 30, 40, 50 calculated by the data calculator 70 to the Pod key 10 . When the Pawkey 10 is positioned in two or more overlapping areas in the first to fourth sensing areas 21 to 51, the four LF antennas 20, 30, 40, and 50 It is preferable to sense the position of the pawb key 10 by using the combination of the magnetic field strength and the magnetic field strength of each of the four LF antennas 20, 30, 40, and 50.

The position calculating section 90 detects the positions of the paw keys 10 without detecting the indoor and outdoor shaded areas of the vehicle 1 at the sensing section 80. The position calculating section 90 calculates the positions of the four LF antennas 20, The installation position can be calculated. The four LF antennas 20, 30, 40, and 50 may be disposed at corresponding positions by determining the installation positions of the four LF antennas 20, 30, 40, and 50 at the position calculating section 90. [

In the present invention, the number of LF antennas is assumed to be four, but it is not necessarily the case that the number of the LF antennas is three or less if the position of the pod keys 10 can be detected without the indoor and outdoor shaded areas of the vehicle 1 However, the present invention aims at designing the installation positions of the least number of LF antennas and the most preferable antennas through the index provided by the position calculating section 90. Hereinafter, for convenience of explanation, it is assumed that the optimum number of LF antennas is four.

When determining the installation positions of the four LF antennas 20, 30, 40, and 50, the position calculation unit 90 determines the position of the LF antennas 20, 30, 40 and 50 based on the magnetic field intensity A reduced by the vehicle body and the magnetic field intensity B It is preferable to calculate the height of the four LF antennas 20, 30, 40, and 50 by calculating similar points.
The position calculating section 90 calculates the installation positions and heights of the four LF antennas 20, 30, 40, and 50 capable of detecting the position of the pod keys 10 without shaded areas inside and outside the vehicle 1 , The four LF antennas 20, 30, 40, and 50 can be disposed at the calculated positions to sense the position of the pawb key 10.

Hereinafter, a method of positioning an LF antenna of a vehicle according to an embodiment of the present invention will be described with reference to FIG.

FIG. 4 is a flowchart illustrating a method of positioning an LF antenna of a vehicle according to the present invention, FIG. 5 is a conceptual diagram illustrating a method of setting an LF antenna height and a setting of an indoor / outdoor boundary surface of a vehicle according to the present invention.

4 and 5, a method of positioning an LF antenna of a vehicle according to an exemplary embodiment of the present invention includes positioning the X-axis, Y-axis, and Y-axis of each of four LF antennas 20, 30, 40, Axis direction and the Z-axis direction (S20). The magnetic field intensity obtained by the magnetic field intensity obtaining step is applied to the triangular function formula to obtain the magnetic field intensity of the four LF antennas (20, 30, 40, 50) The magnetic field intensity calculation step S30 for each of the LF antennas 20, 30, 40 and 50 for calculating the integrated magnetic field intensity and the magnetic field strength calculation step S30 for the four LF antennas 20, 30, 40, A position detection step S40 of detecting the position of the Pawkey 10 that wirelessly communicates with the four LF antennas 20, 30, 40 and 50 using the magnetic field strength, The position of the four LF antennas 20, 30, 40, and 50 in the vehicle is detected through the position of the pod keys 10 sensed by the sensing step And a determining LF antenna installation position calculation step (S50).

First, the magnetic field intensity output from each of the four LF antennas 20, 30, 40, and 50 is set. (S10) To determine whether the position of the pawkey 10 is indoors or outdoors of the vehicle 1 , The magnetic field intensity output from each of the four LF antennas 20, 30, 40, and 50 is set in consideration of the reduction of the magnetic field strength by the vehicle body.

The method of setting the magnetic field intensity values output from each of the four LF antennas 20, 30, 40, and 50 with reference to FIG. 5 is a method of setting the LF antenna magnetic field intensity (A =? H) a divided value (△ H / 2), i.e., the magnetic field intensity that the fob key 10 is recognized in terms of the vehicle outside (H _max) fob key 10 recognizes the magnetic field strength of the maximum distance allowed by the vehicle outside in the (H _min ) divided by half. The above description can be expressed by the following equation.

That is,? H / 2 = (H _max - H _min ) / 2.

Next, the magnetic field strengths output from the four LF antennas 20, 30, 40, and 50 are acquired. (S20) The X axis, Y axis, and Y axis of each of the four LF antennas 20, And obtains the magnetic field intensity output in the Z-axis direction.

The integrated magnetic field intensity integrated for each of the four LF antennas 20, 30, 40, and 50 is calculated. (S30) The magnetic field intensity obtained in the magnetic field strength acquiring step S20 is applied to the four LF antennas 20, 30, 40, 50). A method for calculating the integrated magnetic field intensity integrated for each of the four LF antennas 20, 30, 40, and 50 is expressed as follows.

The FOV keys 20 are wirelessly communicated with the four LF antennas 20, 30, 40, and 50 using the magnetic field strength calculated by the magnetic field strength calculation step S30 for each of the four LF antennas 20, The LF antenna 20 detects the position of the LF antenna 10 by the magnetic field intensity calculated by the magnetic field strength calculation step S30 for each of the four LF antennas 20, 31, 41, and 51 are set to detect the position of the pod keys 10, respectively. At this time, the sensing areas 21, 31, 41 and 51 of the four LF antennas 20, 30, 40 and 50 are formed to overlap with each other. The four LF antennas 20, 30, 40, and 50, which are calculated in the magnetic field strength calculation step S30 for each of the four LF antennas 20, 30, 40 and 50, The distance from each of the antennas 20, 30, 40, 50 to the pawkey 10 is calculated.

When the pod keys 10 are positioned in the sensing areas 21, 31, 41 and 51 in which two or more are overlapped, the magnetic field strength of each of the four LF antennas 20, 30, 40, The position of the pod keys 10 is sensed using a combination of magnetic field strengths of the respective antennas 20, 30, 40, and 50.

The mounting positions in the vehicle 1 are calculated by the four LF antennas 20, 30, 40, and 50 through the position of the pawb key 10 sensed by the position sensing step S40. S50) In order to prevent indoor and outdoor shaded areas of the vehicle 1 from being detected by the LF antennas out of the four LF antennas 20, 30, 40, and 50, four LF antennas (20, 30, 40, 50). The height of the four LF antennas 20, 30, 40, and 50 is calculated by calculating a point where the magnetic field intensity A reduced by the vehicle body is similar to the magnetic field intensity B generated by the door window.

The four LF antennas 20, 30, 40, and 50 are installed according to the four LF antennas 20, 30, 40, and 50 installed in the four LF antennas 20, , 50 are arranged in the vehicle (S60)

According to the preferred embodiment of the system for positioning the LF antenna of the vehicle according to the present invention constructed as described above, the number of LF antennas provided in the vehicle is reduced from six to four, thereby reducing the volume, And it is possible to detect the exact position of the Pawkey located indoors or outdoors of the vehicle while minimizing errors that may occur in the shaded area, thereby creating the advantage of improving accuracy.

The LF antenna positioning system and the method of the vehicle according to the embodiment are not limited to the configuration and the method of the embodiments described above, but the embodiments are not limited to the embodiments of the embodiments All or some of them may be selectively combined.

For example, in a preferred embodiment of the present invention, the case where the number of LF antennas is four is described as the most preferable vehicle interior space. However, when the vehicle interior space is small or large, the number of necessary LF antennas may vary. It is natural that the installation position of each LF antenna can be changed by the change of the magnetic field intensity outputted for each LF antenna.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention.

<Detailed Description of Main Drawings>
1: vehicle
10: Povc key
20: first LF antenna 30: second LF antenna
40: third LF antenna 50: fourth LF antenna
60: Data acquisition unit
70: Data calculation unit
80:
90:

Claims (15)

A magnetic field intensity obtaining step of obtaining magnetic field strengths output in X axis, Y axis and Z axis directions of each of four LF antennas provided at a plurality of locations of a vehicle;
A magnetic field intensity calculation step of calculating an integrated magnetic field intensity for each of the four LF antennas by applying the magnetic field intensity obtained by the magnetic field intensity acquisition step to a triangular function equation;
Detecting a position of a pod key that wirelessly communicates with the four LF antennas using the magnetic field strength calculated by the magnetic field strength calculation step for each of the four LF antennas;
And an LF antenna installation position calculating step of calculating an installation position in the vehicle for each of the four LF antennas through the position of the Paw key sensed by the Pawkey key position sensing step.
The method according to claim 1,
In the magnetic field strength acquiring step,
Further comprising a magnetic field intensity setting step of setting a magnetic field intensity output from each of the four LF antennas in consideration of a decrease in magnetic field intensity by the vehicle body to determine whether the position of the Pawkey is inside or outside the vehicle A method for positioning an LF antenna of a vehicle.
The method according to claim 1,
Wherein the pod key position sensing step comprises:
Wherein the four LF antenna sensing zones are set by the magnetic field strength calculated by the four magnetic field intensity calculating steps of the four LF antennas to detect the position of the Pawkey.
The method of claim 3,
Wherein the sensing areas of the four LF antennas overlap each other.
The method according to claim 1,
Wherein the pod key position sensing step comprises:
And calculating the distance from each of the four LF antennas to the Pawkey through the integrated magnetic field intensity integrated for each of the four LF antennas calculated in the magnetic field strength calculation step for each of the four LF antennas. The method according to claim 1,
Wherein the pod key position sensing step comprises:
A plurality of LF antennas for detecting a position of the Pawkey using a combination of a magnetic field strength of each of the four LF antennas and a magnetic field strength of each of the four LF antennas when the Pawkey is located in the sensing area, Of the LF antenna.
The method according to claim 1,
The LF antenna installation position estimating step may include:
Wherein an installation position of the four LF antennas is calculated so that indoor and outdoor shaded areas of the vehicle in which the Pawkey is not detected are not generated by any of the LF antennas among the four LF antennas.
The method according to claim 1,
The LF antenna installation position estimating step may include:
A method for positioning an LF antenna of a vehicle, wherein a height of the four LF antennas is calculated by calculating a point where a magnetic field strength (A) reduced by a vehicle body and a magnetic field strength (B) A pawl key provided to open and close each door of the vehicle;
Four LF antennas provided at a plurality of locations of the vehicle;
A data acquiring unit for acquiring a magnetic field intensity output for each of the four LF antennas;
A data calculating unit for applying the magnetic field intensity obtained by the data obtaining unit to a trigonometric function to calculate an integrated magnetic field intensity integrated for each of the four LF antennas;
A sensing unit sensing the position of the pod key using the integrated magnetic field strength calculated by the data calculation unit;
And a position calculation unit for calculating an installation position of the four LF antennas when the detection unit senses the position of the pod keys without a shade area of the vehicle interior and exterior.
10. The method of claim 9,
In the four LF antennas,
A first LF antenna provided on a passenger seat door of the vehicle, the first LF antenna transmitting a signal to the first outside of the vehicle and the first outside of the vehicle to sense the Pawkey;
A second LF antenna provided at the center between the passenger seat and the driver's seat of the vehicle for sensing a Pobey key by sending a signal to a second sensing area inside the vehicle;
A third LF antenna provided on a driver's seat door of the vehicle for sensing a Pobey key by sending a signal to a left outside of the vehicle and a third sensing area inside the vehicle;
And a fourth LF antenna provided in a trunk of the vehicle for emitting a signal to a rear outside of the vehicle and a fourth sensing area inside the vehicle to sense the Pawkey.
11. The method of claim 10,
Wherein the first sensing area to the fourth sensing area where the first LF antenna to the fourth LF antenna sense the Pod key overlap each other in at least two places.
10. The method of claim 9,
Wherein the data obtaining unit comprises:
And acquires magnetic field intensities in X-axis, Y-axis, and Z-axis directions of each of the four LF antennas.
10. The method of claim 9,
The magnetic field intensity output for each of the four LF antennas is determined by the LF of the vehicle output in consideration of the magnetic field strength of the four LF antennas which is reduced by the vehicle body to determine whether the position of the Pawkey is inside or outside the vehicle. Antenna positioning system.
11. The method of claim 10,
The sensing unit includes:
A combination of the magnetic field strength of each of the four LF antennas and the magnetic field strength of each of the four LF antennas is used when the Pov key is located in two or more overlapping areas in the first to fourth sensing areas Wherein the position sensor detects the position of the Pawkey.
10. The method of claim 9,
The position calculating unit may calculate,
When determining the installation positions of the four LF antennas, a point where the magnetic field intensity A reduced by the vehicle body and the magnetic field intensity B generated at the door window are similar to each other is calculated to calculate the height of the four LF antennas An LF antenna positioning system for a vehicle.

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