KR101049666B1 - User identification card system and smart key detection method - Google Patents

Abstract

The present invention relates to a personal identification card (PIC) system, and more particularly to a user identification card system and a smart key detection method for improving the detection speed of the smart key.

The present invention includes a smart key for transmitting a response signal to the reception of the smart key confirmation request signal, and a 1LF antenna and a 2LF antenna in the left or right door, and when the smart key detection event occurs, the 1LF antenna and the first key. The first smart key check request signal including the position information on the first antenna and the second smart key check request signal including the position information on the second antenna are respectively provided through the 2LF antenna, respectively. And a door lock release signal to a body control module (BCM) when the response signal to at least one of the first and second smart key confirmation request signals is received. It characterized in that it comprises a personal identification card unit for releasing.

PIC, FOB, LF, Antenna, Recognition, Speed

Description

How to detect user identification card system and smart key {PERSONAL IDENTIFICATION CARD SYSTEM AND METHO FOR DETECTING FOB}

The present invention relates to a personal identification card (PIC) system, and more particularly to a user identification card system and a smart key detection method for improving the smart key detection speed.

With the development of automotive, electronic and communication technologies, automobiles are incorporating various electronic and communication technologies to provide driver convenience.

One such technology is a Personal Identification Card System (PIC) system. The PIC system is usually composed of a smart key and a PIC unit, and a driver equipped with a smart key is a convenient device that can automatically start or turn off the door lock without physical contact after performing driver authentication even if the driver only has access to the vehicle.

1 is a diagram illustrating a case where a general PIC system is applied to an automobile.

A configuration and an outdoor smart key detection procedure will be described with reference to FIG. 1.

First, a PIC system generally consists of at least four low frequency (LF) antennas, a PIC unit 10 and a smart key (FOB) 20.

Two LF antennas are installed at the front and rear of the vehicle to identify a smart key including respective LF antenna position information output from the PIC unit 10 to detect the smart key 20 in the room. Each of the request signals is transmitted, and the remaining two LF antennas are installed on the left and right doors and include the left and right LF antenna position information output from the PIC unit 10 to detect the smart key 20 approaching the vehicle from the outside. Send a key confirmation request signal, respectively. Since the present invention relates to the door lock release according to the detection of a smart key approaching the vehicle from the outside, the description of the front LF antenna and the rear LF antenna will be omitted.

Hereinafter, a general smart key 20 detection method in the PIC unit 10 will be described. The PIC unit 10 checks whether a smart key detection event occurs (S100). The smart key detection event refers to generation of a door lock signal due to a push of a switch for a smart key operation in a vehicle while the driver gets out of the vehicle or generation of a door lock signal due to a press of a door lock switch of a smart key. The door lock may be a control signal for locking the door or a door lock state signal when the door is locked.

When the smart key detection event occurs, the PIC unit 10 transmits a smart key confirmation request signal, which is an LF signal, through a left LF antenna (S101).

Then, when the smart key confirmation request signal transmitted through the left LF antenna is received, the smart key 20 performs a reception process of detecting LF antenna position information from the smart key confirmation request signal (S103). Afterwards, a response signal, which is a microwave signal for the left LF antenna, is transmitted to the PIC unit 10 (S105). However, even though the smart key confirmation request signal is transmitted through the LF antenna, if the smart key 20 is outside the reception range of the smart key confirmation request signal, steps S103 and S105 are not performed.

After the PIC unit 10 transmits the smart key confirmation request signal through the left LF antenna, the PIC unit 10 waits for a response signal to the smart key confirmation request signal transmitted through the left antenna, and a response signal from the smart key 20 is received. If received, performs a receiving process (S107), such as detection of the LF position information included in the response signal, and generates a door lock release signal after performing authentication by LF antenna position identification and authentication information by the LF position information control area The door lock is released by transmitting to a body control module (BCM) via a vehicle network such as a control area network (CAN) or a local interface network (LIN) (S117).

However, if the response signal for the left LF antenna is not received for a predetermined time, the PIC unit 10 transmits a smart key confirmation request signal that is an LF signal through the right LF antenna (S109).

Then, if the smart key 20 is within a reception range capable of receiving a signal transmitted from the right LF antenna, the smart key 20 receives the smart key confirmation request signal and performs a reception process of detecting LF antenna position information (S111). Thereafter, a response signal including the LF antenna position information is transmitted to the PIC unit 10 (S113). However, if the smart key is outside the range capable of receiving a signal transmitted from the right LF antenna, the steps S111 and S113 are not performed.

When the PIC unit 10 receives the response signal, which is a UHF signal only to the right LF antenna, performs a reception processing process such as detecting the LF antenna position information (S115), and transmits the door lock release signal to the BCM in the above-described S117 to the door lock. Release it.

However, if the response signal is not received from the smart key 20 for the transmission of the left and right smart key confirmation request signals, the above-described processes are repeated.

As described above, the smart key confirmation request signal is transmitted through the left LF antenna, the response signal is waiting to be received, the smart key confirmation request signal is transmitted through the right LF antenna, and the response thereto, in order to detect the smart key outside the vehicle. Since the smart key is detected through four processes of waiting for a signal, there is a problem in that it takes a long time to detect the smart key.

In particular, due to the nature of the PIC system, the PIC unit must detect the smart key and release the door lock before the driver can open the door by pulling the door handle. However, when the detection of the smart key is delayed, a jamming phenomenon (a phenomenon in which the lock of the door lock is not pulled out) may occur, which may inconvenience the driver.

Accordingly, an object of the present invention is to provide a user recognition card system and a smart key detection method for improving the speed of recognizing a smart key by simplifying a procedure of signals transmitted and received between a PIC unit and a smart key.

PIC system of the present invention for achieving the above object; A smart key for transmitting a response signal for receiving a smart key confirmation request signal, and a 1LF antenna and a 2LF antenna in the left or right door, and when the smart key detection event occurs through the 1LF antenna and the 2LF antenna The first smart key confirmation request signal including the location information for the first antenna and the second smart key confirmation request signal including the location information for the second antenna are transmitted through the first and second antennas, respectively. And, when a response signal to at least one smart key confirmation request signal is received from the first and second smart key confirmation request signals, outputs a door lock release signal to a body control module (BCM) to release the door lock. And an identification card unit.

The detection event is characterized in that the door lock signal for locking the door.

The first smart key confirmation request signal and the second smart key confirmation request signal may be sequentially transmitted at predetermined intervals.

The first smart key confirmation request signal and the second smart key confirmation request signal are simultaneously transmitted.

Smart key detection method of the personal identification card system for achieving another object of the present invention; A smart key detection method of a personal identification card system including a smart key, a personal identification card device for performing data communication via a vehicle body control module and a vehicle network, wherein the personal identification card device is left or right when a smart key detection event occurs. A first process of transmitting the first and second smart key confirmation request signal through the first and second LF antenna installed in the door, and the smart key is at least one of the first and second smart key confirmation request signal A second process of receiving a signal and transmitting a response signal to the received smart key confirmation request signal; and receiving the response signal from the personal identification card device and outputting a door lock release signal to the vehicle body control module to release the door lock. It characterized in that it comprises a third process.

The detection event is characterized in that the door lock signal for locking the door.

The first smart key confirmation request signal and the second smart key confirmation request signal may be sequentially transmitted at predetermined intervals.

The first smart key confirmation request signal and the second smart key confirmation request signal are simultaneously transmitted.

According to the present invention, the PIC unit continuously transmits or simultaneously transmits the smart key confirmation request signal having the respective LF antenna position information through the left LF antenna and the right LF antenna at a slight time interval, and the smart key is one of the two signals. Since the PIC unit detects the smart key by receiving at least one and transmitting the response signal including the position information of the at least one LF antenna, the smart key detection procedure can be reduced.

In addition, the present invention can reduce the smart key detection procedure can reduce the time required for smart key detection has the effect of preventing jamming phenomenon.

In addition, the present invention can reduce the signal transmission and reception procedure required for smart key detection has the effect of reducing the battery power consumption of the vehicle or smart key.

Hereinafter, a configuration and operation of a PIC system according to the present invention will be described with reference to the drawings.

2 is a view showing a vehicle to which the PIC system according to the present invention is applied.

The PIC system according to the present invention includes four LF antennas 131, 132, 133, and 134, a PIC unit 100, and a smart key 200.

The left LF antenna (or "first LF antenna") 131 according to the present invention is disposed in the left door, and the right LF antenna (or "second LF antenna") 132 is disposed in the right door. The first LF antenna 131 and the second LF antenna 132 detect a smart key 200 located outside the vehicle 1 and approaching the vehicle 1.

When the smart key confirmation request signal is received from at least one of the PIC unit 100 and the LF antennas, the smart key 200 measures the received signal field strength of the smart key confirmation request signal, and the LF antenna from the keyy confirmation request signal. Detect and store location information. Then, the smart key 200 transmits to the PIC unit 100 a response signal including at least one LF antenna position information and received signal field strength with respect to the received smart key confirmation request signal.

The PIC unit 100 periodically checks a smart key confirmation request signal (hereinafter, referred to as a smart key confirmation request signal transmitted through the first 1LF antenna 131 and the 2LF antenna 132). Denotes a "first smart key confirmation request signal", and a smart key confirmation request signal transmitted through the second LF antenna 132 is referred to as a "second smart key confirmation request signal" to generate the first LF antenna 131. And second antennas 132.

When a response signal is received in response to the smart key confirmation request signals, the PIC unit 100 performs a reception processing operation for detecting the LF antenna position information and the received signal field strength included in the response signal. ). The response signal includes a smart key identifier for performing authentication in comparison with a smart key identifier registered in advance in the PIC unit 100.

In FIG. 2, the entire system has been described. Hereinafter, configurations of the PIC unit 100 and the smart key 200 will be described with reference to FIGS. 3 and 4.

3 is a schematic diagram showing an internal configuration of a PIC unit of a PIC system according to the present invention;

The PIC unit includes a control unit 110, a storage unit 120, an LF transmitter 130, a UHF communication unit 140, and an interface unit 150.

The controller 110 controls the overall operation of the PIC unit. In particular, the control unit 110 generates smart key confirmation request data including first and second LF antenna position information to be loaded on the smart key confirmation request signal, and the LF from the response data input through the UHF communication unit 14. After receiving the operation of detecting the antenna position information and the RSSI and the smart key identifier and storing it in the storage unit 120, if the authentication is successful, a door lock release signal for releasing the door lock according to the smart key detection is generated and output.

The storage unit 120 includes a program area for storing a control program for controlling an operation according to the present invention, a temporary area for storing data generated during the execution of the control program, and the first and second antennas 131 and 2LF. And a data area for storing data such as location information and a registered smart key identifier.

The LF transmitter 130 receives the smart key confirmation request data for each of the 1LF antenna 131 and the second LF antenna 132 from the control unit 110, and puts each of the smart key confirmation request data into a long wave signal. Transmit through the LF antenna.

The UHF communication unit 140 performs UHF data communication with the smart key 200. In particular, the UHF communication unit 140 receives the response signal from the smart key 200, converts it into response data that can be recognized by the control unit 110 and outputs it to the control unit 110.

The interface unit 150 is connected to a body control module (BCM-not shown) to perform data communication. The interface unit 150 may be a control area network (CAN) or a local interface network (LIN).

4 is a schematic diagram showing an internal configuration of a smart key of the PIC system according to the present invention.

Referring to FIG. 4, the smart key 200 includes an FOB control unit 210, a storage unit 220, an LF receiver 230, a reception field strength measurement unit 240, and a UHF communication unit 250.

The FOB control unit 210 controls the overall operation of the smart key 200. In particular, the FOB control unit 210 detects the LF antenna position information from the smart key confirmation request data, and generates response data including the measured received signal field strength (RSSI) and the detected antenna position information.

The storage unit 220 stores a program area for storing a control program for controlling the operation of the smart key 200, a temporary area for temporarily storing data generated during the execution of the control program, and stores its own identifier. Contains a data area.

The LF receiver 230 receives the smart key confirmation request signal through the LF antenna 231 and converts the smart key confirmation request signal into smart key confirmation request data that can be recognized by the FOB control unit 210. )

The receiving field strength measuring unit 240 receives the smart key confirmation request signal through the LF receiving unit 230 and measures the received signal field strength (RSSI) of the smart key confirmation request signal and outputs it to the FOB control unit 210. .

The UHF communication unit 250 performs UHF wireless data communication with the UHF communication unit 140 of the PIC unit 100. In particular, the UHF communication unit 250 transmits a response signal loaded with the response data input from the FOB control unit 210 to the UHF radio signal to the PIC unit 100.

2 to 4 described the configuration of the PIC system. Hereinafter, a smart key detection method by the above configurations will be described.

5 is a flowchart illustrating a smart key detection method of a PIC system according to the present invention, and FIG. 6 is a view for comparing the smart key detection time in the present invention and a conventional PIC unit. A description with reference to FIGS. 5 to 6 is as follows.

The PIC unit 100 checks whether a smart key detection event occurs (S410). The smart key detection event refers to generation of a door lock signal due to a switch push of a switch for operating a smart key in a vehicle while the driver gets out of a vehicle, or generation of a door lock signal by pressing a door lock switch of a smart key. The door lock may be a control signal for locking the door or a door lock state signal when the door is locked.

When the smart key detection event occurs, the PIC unit 100 transmits the first smart key confirmation request signal through the first LF antenna 131 at a first time point t1 as shown in FIG. 6 (S411).

After the transmission of the first smart key confirmation request signal, the PIC unit 100 continuously transmits the second smart key confirmation request signal through the second LF antenna 132 at a second time point t2 after a predetermined time t2-t1. Is transmitted (S413).

Then, when the first or second smart key confirmation request signal is received, the smart key 200 performs a reception process of detecting LF antenna position information from the received smart key confirmation request signal (S415). A response signal to the key confirmation signal is generated and transmitted to the PIC unit 100 (S417). The smart key 200 is generally configured to receive only one smart key confirmation request signal. That is, the radiation pattern and the transmission power of the 1LF antenna and the 2LF antenna are determined so that the smart key 200 outside the vehicle 1 receives only one smart key confirmation request signal. However, in order to receive both the first and second smart key confirmation request signals due to an error, and to prevent respective response signals, the transmission interval of the first and second smart key confirmation request signals and the reception of the smart key confirmation request signals are prevented. It would be desirable to determine whether the detection interval. In this regard, in order to further improve the detection speed of the smart key 200 and to prevent the transmission of respective response signals for the reception of two signals due to an error, the first and second smart key confirmation request signals may be received at a first point in time. It would be desirable to be configured to transmit simultaneously at t1).

When the response signal is received, the PIC unit 100 detects and stores the LF antenna position information and the smart key identifier from the response signal, and performs a receiving process of performing authentication to authenticate whether the smart key is a registered smart key ( S419), the door control command, that is, the door lock release command is transmitted to the BCM through the car network, CAN or LIN to release the door lock (S421).

According to the present invention, the first and second smart key confirmation request signals are continuously transmitted at the first time point t1 and the second time point t2, and a response signal is transmitted to the third time point at one smart key confirmation request signal. Since the smart key is detected by t3), the smart key can be detected at the third time point t3 which is faster by the time t5-t3 than the conventional smart key time t5 as shown in FIG. It can be seen that.

On the other hand, the present invention is not limited to the above-described typical preferred embodiment, but can be carried out in various ways without departing from the gist of the present invention, various modifications, alterations, substitutions or additions in the art Anyone who has this can easily understand it. If such improvement, change, substitution or addition is carried out within the scope of the appended claims, the technical spirit should also be regarded as belonging to the present invention.

1 is a view showing a smart key detection method in a general PIC system

2 is a view showing a vehicle to which the PIC system according to the present invention is applied

3 is a schematic diagram showing an internal configuration of a PIC device of a PIC system according to the present invention;

4 is a schematic diagram showing an internal configuration of a smart key of the PIC system according to the present invention

5 is a flowchart illustrating a smart key detection method of a PIC system according to the present invention.

6 is a flowchart illustrating a smart key detection method in a PIC device of a PIC system according to the present invention.

7 is a view for comparing the smart key detection time of the present invention and the prior art.

[Description of Drawings]

100: PIC device 131: left LF antenna

132: right LF antenna 200: smart key

Claims (8)

A smart key that receives at least one of the first and second smart key confirmation request signals and transmits a response signal to the received signal; The first and second LF antennas are provided on the left and right doors, and include a position information on the first LF antenna in the outward direction of the vehicle through the first and second LF antennas when a smart key detection event occurs. A second smart key confirmation request signal including a smart key confirmation request signal and location information on the second LF antenna is transmitted through the first and second LF antennas, respectively, and the first and second smart key confirmation request signals are generated. Recognizing a user characterized in that it comprises a personal identification card unit for outputting the door lock release signal to the body control module (BCM) to release the door lock when a response signal to the at least one smart key confirmation request signal is received; Card system. The method of claim 1, The detection event is a user identification card system, characterized in that the door lock signal generated by the pressing of the switch in the vehicle or the door lock switch of the smart key to initiate the operation of the smart key. The method according to claim 1 or 2, And the first smart key confirmation request signal and the second smart key confirmation request signal are sequentially transmitted at predetermined intervals. The method according to claim 1 or 2, And the first smart key confirmation request signal and the second smart key confirmation request signal are simultaneously transmitted. In the smart key detection method of a personal identification card system comprising a smart key, a personal identification card device for performing data communication via the vehicle control module and the vehicle network, A first process of transmitting, by the personal identification card device, first and second smart key confirmation request signals to the outside of the vehicle through the first and second LF antennas respectively installed at the left or right door when the smart key detection event occurs; , A second step of the smart key receiving at least one of the first and second smart key confirmation request signals and transmitting a response signal to the received smart key confirmation request signal; And a third step of the personal identification card device receiving the response signal and outputting a door lock release signal to the vehicle body control module to release the door lock. The method of claim 5, The detection event is a smart key detection method of a user recognition card system, characterized in that the door lock signal generated by the pressing of the switch in the vehicle or the door lock switch of the smart key to initiate the operation of the smart key. The method according to claim 5 or 6, And the first smart key confirmation request signal and the second smart key confirmation request signal are sequentially transmitted at predetermined intervals. The method according to claim 5 or 6, The smart key detection method of the user recognition card system, characterized in that the first smart key confirmation request signal and the second smart key confirmation request signal is transmitted at the same time.

Images