KR102109194B1 - Fob detecting system of vehicle and method thereof - Google Patents

Abstract

The present invention discloses a vehicle start button device and a method of starting a start button device. According to the present invention, the level and the largest level of the authentication signal received from the LF antenna having a common detection area for the search area of the LF antenna having the largest level among the levels of the authentication signal of the fob key received through the multiple LF antennas Based on the level of the authentication signal, the location of the fob key is determined, and thus, the fob key is used using fewer LF antennas than the number of antennas for detecting the location of the fob key based on the existence of the existing authentication signal. It will be possible to accurately detect the location of.

Description

FOB DETECTING SYSTEM OF VEHICLE AND METHOD THEREOF}

The present invention relates to a fobkey detection system and method for a vehicle, and more particularly, to a method and system for accurately detecting the position of a fobkey using a minimum number of LF antennas.

Modern vehicles are becoming a necessity for modern people. These vehicles have no major changes in the purpose of transporting passengers, but it is true that the vehicle's value and indoor environment are significantly different from the conventional ones.

That is, even though the vehicle is the same model due to the diversification of the price range and the diversification of installation equipment, a recent vehicle has many differences in price and performance and convenience.

In addition, as the number of vehicles increases and the number of users increases, an increase in convenience is considered as an essential requirement, and theft accidents are frequent and preparations are also required. The smart key electric control unit (ECU) has been developed and commercialized for this purpose. The smart key ECU system is a system that allows the vehicle to be used by unlocking the handle or transmission only when authentication is performed by a fob key (FOB) with an embedded IC.

That is, when the LF signal strength of a predetermined predetermined level is received, the FOB key detects a FOB key in a method of transmitting a pre-stored authentication signal to the smart key ECU in response to the LF signal.

In detecting the fob key, such a smart key ECU sets a certain order for detection of the fob key, and sequentially outputs a search signal for a designated detection area according to the setting order to detect the user's forb key. do.

However, the smart key ECU has an error for the detection result of the fob key according to the internal shape of the vehicle and the position of the LF antenna, and more LF antennas are needed to eliminate the error. That is, in the case of such a general fob key detection system, as shown in FIG. 1, six LF antennas, such as indoors, trunks, bumpers, and doors, are normally required to detect an accurate fob key.

Therefore, the present invention was created to solve the above problems, and the object of the present invention is that a fob key exists in an LF antenna having the largest level among the levels of authentication signals of the fob key received through a plurality of LF antennas. According to the present invention, a method and a method for detecting a fob key of a vehicle are used to detect a location of a fob key based on the presence or absence of an existing authentication signal. It is possible to accurately detect.

Another object of the present invention, the level of the authentication signal supplied from the LF antenna having a common detection area for the detection area of the LF antenna having the largest level of the level of the authentication signal of the Forbes key received through a plurality of LF antennas Provided by a vehicle forbes detection system and method for determining the location of a probe key based on the level of the largest authentication signal, the number of antennas for detecting the location of the fob key based on the existence of an existing authentication signal is less than It is possible to accurately detect the position of the fob key using a number of LF antennas.

Forve key detection system of a vehicle according to an embodiment of the present invention for achieving the above object,

And a smart key electric control unit (ECU) for determining the location of the fob key according to the fob key authentication signal received through a plurality of LF antennas communicating with the fob key transponder,

The smart key ECU,

It is characterized in that it is further provided to further include a control unit for determining the position of the fob key based on the level of the authentication signal of the fob key supplied from the plurality of LF antennas.

Preferably, the control unit,

It is characterized in that it is provided to determine that the fob key exists in the search area of the LF antenna having the largest level among the authentication signal levels of the fob key supplied from a plurality of LF antennas.

Preferably, the control unit,

The location of the fob key based on the level of the authentication signal received from the LF antenna having a common detection area with respect to the received LF antenna, the level of the largest authentication signal among the level of the authentication signal of the forb key received from the plurality of LF antennas It characterized in that it is provided to determine.

A method for detecting a fob key of a vehicle according to an embodiment of the present invention for achieving the above object is

A fob key authentication signal receiving step of receiving a fob key authentication signal supplied from a plurality of LF antennas in a smart key ECU; And

It is characterized in that the authentication signals of the fob key received through each LF antenna include a fob key position determination step of determining the position of the fob key based on the level and the level of the preset authentication signal.

Preferably, the fob key position determination step,

It is characterized in that it is provided to determine that the fob key is present in the detection area of the LF antenna having the largest level among the levels of the authentication signals of the multiple fob keys through the multiple LF antennas.

Preferably, the Forbkey position determination step,

The location of the fob key based on the level of the authentication signal received from the LF antenna having a common detection area with respect to the received LF antenna, the level of the largest authentication signal among the level of the authentication signal of the forb key received from the plurality of LF antennas It characterized in that it is provided to determine.

As described above, the vehicle forb key detection system and method according to an embodiment of the present invention, the fob within the search area of the LF antenna having a larger level of the level of the authentication signal of the forb key received through a plurality of LF antenna As it is determined that the key exists, it is possible to accurately detect the position of the forb key using fewer LF antennas than the number of LF antennas for detecting the fob key based on the existence of the existing authentication signal.

The following drawings attached in this specification are intended to illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the invention described below, and thus the present invention is described in such drawings. It is not limited to interpretation.
1 is a view showing a detection area of an LF antenna of a general vehicle.
2 is a view showing the configuration of an immobilizer of a vehicle to which an embodiment of the present invention is applied.
3 is a view showing a detection area of an LF antenna of a vehicle according to an embodiment of the present invention.
4 is a flowchart illustrating a process of detecting an LF antenna of a vehicle according to another embodiment of the present invention.

In order to fully understand the present invention and the operational advantages of the present invention and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the contents described in the drawings, which illustrate preferred embodiments of the present invention.

Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the present invention with reference to the accompanying drawings. The same reference numerals in each drawing denote the same members.

2 is a view showing the configuration of an immobilizer system to which the present invention is applied, and FIG. 3 is an exemplary view showing a detection area of a plurality of LF antennas shown in FIG. 2.

2 and 3, the vehicle's forb key detection system according to the present invention may include a LF antenna 110 and a control unit 20 of a smart key electric control unit (ECU) that controls the LF antenna 110.

Here, as shown in FIG. 3, the LF antenna 110 is installed in a vehicle interior and one trunk door, respectively, and the detection area of the LF antenna 11 is as shown in FIG. 2.

In addition, the control unit 20 controls the driving of a plurality of LF antennas 110, while searching for the location of the fob key from the authentication signal level transmitted from the transponder 12 of the fob key 10, and then the fob key It is equipped to conduct authentication for.

In the present invention, the control unit 20 transmits the LF authentication request signal of the LF driving unit 21 to the fob key 10 through the LF antenna 110 to attempt LF communication with the fob key 10. When the fob key 10 is in normal communication with the LF antenna 110, the LF antenna 110 receives the authentication signal supplied from the transponder 12 of the fob key 10 and controls the control unit 20. To send.

The control unit 20 is provided to search the position of the fob key 10 according to the level of the authentication signal.

The control unit 20 is based on the level of the authentication signal of the fob key 10 received from the LF antenna 111 and 113 mounted indoors and the LF antenna 115 mounted on the trunk door 10 ).

For example, the level of the authentication signal supplied from the LF antennas 111 and 113 located indoors is A nT and B nT, respectively, and the level of the authentication signal supplied from the LF antenna 115 mounted on the trunk door is C. In the case of nT, it is determined that a fob key exists in the detection area of the LF antenna 111 having the largest value among A nT, B nT, and CnT.

That is, when the level of the authentication signal (A nT) of the LF antenna 111 located in the room is 5 nT or more, and the level of the authentication signal (C nT) of the LF antenna 115 located in the trunk is 15 nT or more, the control unit ( 20) determines that the Forb key is present in the trunk.

The control unit 20 receives the level of the authentication signal of the fob key 10 supplied from each LF antenna 111, 113 and 115, and receives the level of the authentication signal having the highest level of the received authentication signal. Derive the LF antenna.

Then, the control unit 20, each of the LF antenna 111, 113, 115 of the LF antenna 111 receiving the largest level of the authentication signal and the detection area of the LF antenna 111 except for the LF Of the antennas 113 and 115, the level and the largest level of the authentication signal supplied from one of the LF antennas 113 or LF antennas 115 having a common detection area for the detection area of the LF antenna 111 The existing position of the fob key 10 is determined based on the level of the level authentication signal.

For example, when the authentication level supplied from the LF antenna 115 has a value greater than the level of the authentication signal received from the LF antenna 111, 113, 115, the control unit 20 is the most It is determined that the fob key 10 exists in the detection area of the received LF antenna 115 where the level of the large authentication signal is received, and then the LF antenna 113 having a common detection area for the detection area of the LF antenna 115 Alternatively, the existing location of the fob key 10 is determined based on the level of the authentication signal supplied from one of the LF antennas 115.

For example, if the level (B nT) of the authentication signal supplied from the LF antenna 113 is 3 nT or more and the level (C nT) of the authentication signal supplied from the LF antenna 115 is 15 nT or more, the LF antenna 115 It is determined that the fob key 10 exists in the detection area of.

In addition, the control unit 20 provided with the authentication signal of the fob key received through the LF antenna 110 converts the authentication signal of the fob key to derive authentication information and performs authentication on the generated authentication information.

That is, it is determined that the fob key 10 is present in the detection area of the LF antenna having the largest level among the levels of the authentication signal received through the multiple LF antennas, and the forb key 10 is determined based on the determined result. A series of processes for performing authentication will be described with reference to FIG. 4.

FIG. 4 is a flow chart showing a process of detecting a fob key of the control unit shown in FIG. 3. 2 to 4, a description will be given of a vehicle forb key detection process according to another embodiment of the present invention.

First, the control unit 20 of the smart key ECU signals an authentication request to the fob key 10 through communication with the fob key 10 and a plurality of LF antennas 111, 113 and 115 through step 301. And the forb key 10 transmits an authentication signal to the LF antennas 111, 113, and 115 in response to the received authentication request signal (step 303).

The control unit 20 receiving the authentication signal through the LF antennas 111, 113 and 115 compares the level of the authentication signal of each of the received LF antennas 111, 113 and 115 (step) 305).

Subsequently, the control unit 20 is one of the LF antennas 111, 113 and 115 having the largest level among the authentication signal levels of the LF antennas 111 and 113 and 115 as a result of the comparison in step 305. Derive the LF antenna of (step 307).

Meanwhile, the control unit 20 based on the level of the authentication signal received from the LF antenna having the largest authentication signal level and the LF antenna having a common detection area for the detection area and the level of the largest authentication signal, the fob It is determined where the key 10 exists (step 309).

Then, the control unit 20 determines that the fob key 10 exists in the detection area of the derived LF antenna, and displays the determination result.

Thereafter, the control unit 20 converts the RF authentication information received through the RF antenna 120 into authentication information, and then performs authentication on the forb key 10 based on the converted authentication information (step 311). , 313).

Accordingly, as it is determined that the forbes are present in the search area of the LF antenna having a larger level among the levels of the authentication signals of the forbes key received through a plurality of LF antennas, the forbes of the forbes are based on the existence of the existing authentication signal. It is possible to accurately detect the position of the fob key using fewer LF antennas than the number of antennas for detecting the position.

In the embodiment of the present invention, three LF antennas have been described as an example to be installed indoors and trunks, but the number of LF antennas can be changed according to the manufacturer's intention and the installation position of the LF antennas can also be modified and changed by those skilled in the art. Of course you will.

The present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above-described embodiments, and the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims below. Anyone with ordinary knowledge in the technical idea of the present invention extends to the extent that various modifications or modifications are possible.

The level of the authentication signal and the level of the largest authentication signal received from the LF antenna having a common detection area for the search area of the LF antenna having the largest level among the levels of the authentication signal of the forb key received through the multiple LF antennas Based on the presence of the existing existing authentication signal, the location of the fob key is accurately determined using the number of LF antennas less than the number of antennas for detecting the location of the fob key based on the existence of the existing authentication signal. In terms of the accuracy and reliability of operation of the detectable vehicle's Forbkey detection system and method, and furthermore, it can make a great advance in terms of performance efficiency, and the possibility of commercial or sales of the applied vehicle is not only sufficient, but also realistically obvious It is an invention that is industrially applicable because it can be carried out.

Claims (6)

And a smart key electric control unit (ECU) for determining the location of the fob key based on the fob key authentication signal received through a plurality of LF antennas communicating with the fob key transponder,
The smart key ECU,
Further comprising a control unit for determining the position of the fob key based on the authentication signal levels for the authentication signal of the fob key supplied from the plurality of LF antennas,
The control unit,
Determining that the fob key exists in a search area of an LF antenna having the largest authentication signal level among the plurality of LF antennas; And
To determine the location of the fob key based on the largest authentication signal level and the authentication signal level received from the LF antenna sharing a common detection area with the LF antenna having the largest authentication signal level.
Constructed, forve key detection system for vehicles. delete delete Receiving authentication signals for a fob key from a plurality of LF antennas in a smart key ECU; And
And determining the position of the fob key based on the authentication signal level of the forb key received through each LF antenna and a preset authentication signal level,
Determining the position of the fob key,
Determining that the fob key exists in a search area of an LF antenna having the largest authentication signal level among the plurality of LF antennas; And
Determining the position of the fob key based on the largest authentication signal level and an authentication signal level received from an LF antenna sharing a common detection area with an LF antenna having the largest authentication signal level.
Including, forveve key detection method for a vehicle.
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