KR102515958B1 - Smart key system for detecting motion - Google Patents

Abstract

The present invention relates to a smart key motion detection system capable of preventing hacking even when a motion detection unit of a smart key having a built-in motion detection function is broken in order to prevent vehicle theft by hacking wireless communication between a vehicle and a smart key, A smart key system including a vehicle and a smart key that wirelessly communicates with the vehicle to determine whether or not to be authenticated and whether or not to deviate from an operating distance, and transmits a control signal corresponding thereto to the vehicle, wherein the smart key is held by a user A key body that can be operated by using a key body, a transceiver for wireless communication with the vehicle, a motion detection unit for detecting the movement of the key body, and whether or not authentication is performed based on the electric signal received from the transceiver and whether or not the operating distance is out of range In addition, a control unit for determining whether or not the movement of the key body is detected by the motion sensing unit and transmitting a corresponding control signal, a motion failure determination unit determining whether the motion detection unit is out of order, and the motion failure determination unit It includes a motion failure warning unit for warning whether or not the motion detection unit is out of order through the motion detection unit.

Description

Smart key motion detection system {SMART KEY SYSTEM FOR DETECTING MOTION}

The present invention relates to a smart key system, and more particularly, to prevent theft of a vehicle by hacking wireless communication between a vehicle and a smart key, even when a motion detection unit of a smart key having a built-in motion detection function fails. It relates to a smart key motion detection system capable of

In order for a car to move, it must first be 'triggered'. In other words, the starting device plays a role of helping the car engine with physical force from the outside until it can operate by itself.

The vehicle's starting device starts with the world's first gasoline car made by Karl Benz of Germany in 1886. When a large flywheel placed horizontally at the rear of the vehicle is turned clockwise as hard as it can, the metal bands connected to the flywheel collide with each other and create sparks. I woke up and it started. After that, until around 1915, the crank handle was usually connected to the crankshaft by inserting it into a small hole under the radiator grille, and then holding the crank handle with both hands and turning it as hard as possible to start the engine.

This method was very laborious and very dangerous, as the engine's revs had to exceed 100 revolutions per minute for the mixture to be supplied from the engine's carburetor, so a strong man could barely turn the crank handle with all his might to get it started. Therefore, accidents in which a hand or arm was seriously injured in the process of starting the engine frequently occurred. After Byron Carter, a close friend of Cadillac Leland's president, started the engine and was hit in the head by the crank handle bouncing, he died. Charles Kettering, president of the company, invented the self-starter, an electric automatic starter that starts at the touch of a button. This is a method of starting by connecting a motor driven by direct current from a battery to a crankshaft flywheel gear.

The button-type automatic starter developed by Kettering in 1911 was first installed in the Cadillac Model 30 in 1912, and by 1914, 90% of American mass-produced cars were equipped with self-starters. This self-starter is a groundbreaking invention that increases the automobile population, and marks a revolutionary turning point in the history of automobiles that can be easily driven by the elderly and women. Later, in 1949, Chrysler of the United States developed a turn-key starter that starts the engine by connecting the electric system of the ignition device to the car key holder switch. With the same key, you can also select an intermediate level where you can use attached convenience devices such as interior lights and radios by connecting only the battery without operating the engine.

Recently, along with the development of wireless communication technology, a smart key system has emerged that can prevent vehicle theft of the above-described turnkey starter method and select an intermediate step, and has the convenience of a push-operated button structure of a button start method.

That is, the smart key system detects a signal of a smart key possessed by a driver riding in a vehicle and operates the engine when the driver presses a start button. Therefore, since the smart key possessed by the driver and the button starter of the vehicle exchange signals wirelessly, the vehicle is prevented from being stolen and the driver's convenience is greatly improved. In addition, when the start button is pressed while the driver is on board, only power is turned on according to the operation of the brake pedal, or the engine can be started together with the power source, and the engine is stopped by pressing the start button again.

Such a smart key system has been continuously developed since then, and as shown in FIG. 1, a vehicle ( The starting control of 10) may be performed. In addition, it is a trend that the starting control of the vehicle 10 through the smart key system is becoming more and more automated by excluding such remote operation as well as the action of the driver getting into the vehicle 10 and pressing the start button.

However, as shown in FIG. 2, the LF signal of the recent vehicle 10 is hacked and amplified and transmitted to the smart key 20 far away to transmit a control signal to the vehicle 10, thereby stealing the vehicle 10 A hacking method called RSA (Relay Station Attack) is being used.

In order to defend against such RSA, signal strength and location detection as well as various methods have been proposed. There is a technology for blocking the signal of the vehicle 10 when it is determined and not used.

For example, in the case of a smart key system with a motion detection function, motion or shaking of the smart key 20 is detected through a motion detection unit (not shown) built in the smart key 20, and the motion of the smart key 20 is detected. Only when this is detected, it is determined that the actual user is using the smart key 20, and a control signal is transmitted to the vehicle 10 to control it when the authentication between the vehicle 10 and the smart key 20 is successful and within the operating distance. Accordingly, when hacking is attempted through RSA, if the motion of the smart key 20 is not detected because the user does not currently use the smart key 20, the control signal of the vehicle 10 through RSA hacking is not transmitted. Therefore, it is possible to prevent theft of the vehicle 10 in advance.

However, the smart key system endowed with the motion sensing function according to the prior art described above cannot detect movement or shaking of the smart key 20 when the motion sensing unit built into the smart key 20 is broken, and thus motion When the sensing unit is out of order, regardless of whether or not motion is detected for vehicle control, control is performed to transmit a control signal to the vehicle 10 when authentication between the vehicle 10 and the smart key 20 is successful and within an operating distance.

Therefore, when the motion detection unit built into the smart key 20 fails and the smart key 20 does not move or shake, it can be freely exposed to hacking through the above-described RSA, and accordingly, the vehicle 10 The inability to stop theft is an unsolved problem.

An object of the present invention, which was made to solve the above problems, is to prevent theft of a vehicle by hacking wireless communication between a vehicle and a smart key, even when the motion detection unit of a smart key having a built-in motion detection function is broken. It is to provide a smart key motion detection system that can prevent.

In order to achieve the above object, the smart key motion detection system according to the present invention wirelessly communicates with the vehicle to determine whether authentication and whether the operating distance is out of range, and transmits a control signal corresponding thereto to the vehicle In a smart key system including a smart key, the smart key includes a key body that can be grasped and operated by a user, a transmission/reception unit wirelessly communicating with the vehicle, and authentication based on an electrical signal received from the transmission/reception unit. a control unit that determines whether or not the motion of the key body is sensed from the motion sensor, whether the operation distance is out of range, and whether or not the motion of the key body is detected by the motion sensor, and a motion failure determiner that determines whether the motion sensor is out of order and a motion failure warning unit for warning whether or not the motion detection unit is out of order through the motion failure determination unit.

In addition, if the control unit does not receive a response to the control signal transmitted to the vehicle within a predetermined time, it is determined that the operation distance is out of range, and authentication is performed when an authentication failure signal is received with respect to the control signal transmitted to the vehicle. It is judged as a failure, and if a response to the control signal transmitted to the vehicle is received within a preset time, it is judged to be within the working distance, and if an authentication success signal is received for the control signal transmitted to the vehicle, it is judged to be authentication successful. It is characterized by doing.

In addition, the control unit transmits a control signal corresponding thereto only when it is determined that the authentication of the smart key is successful and the movement of the key body is detected by the motion sensing unit, or the motion sensing unit transmits a corresponding control signal. Only when the movement of the key body is sensed from the unit, it is characterized in that the authentication success of the smart key and whether or not the operating distance is out of range are determined and a corresponding control signal is transmitted.

In addition, the smart key is characterized in that it does not transmit a control signal to the vehicle when it is determined that the motion sensing unit is out of order.

In addition, the smart key is characterized in that, when the control signal is not transmitted to the vehicle due to a failure of the motion sensing unit, control is performed to transmit a control signal to the vehicle in a preset button input method.

In addition, the motion failure warning unit may be a flashing light installed on the smart key and flickering when it is determined that the motion sensing unit is out of order.

The motion failure warning unit may be a display installed on the smart key and displayed when it is determined that the motion detection unit is out of order.

The motion failure warning unit may be a speaker installed in the smart key and generating a warning sound when it is determined that the motion detection unit is out of order.

In addition, the vehicle is characterized in that when it is determined that the motion detection unit of the smart key is out of order, it is displayed on a cluster, a center fascia or a HUD, or a warning sound is generated through a vehicle speaker.

The smart key motion detection system according to the present invention hacks the wireless communication between the vehicle and the smart key to prevent vehicle theft. There is an effect of preventing vehicle theft by checking whether the motion sensing unit of the smart key is broken through the warning unit and blocking the transmission of the control signal in advance when the motion sensing unit is broken.

In addition, the motion failure warning part is externally displayed through the flashing light or display of the smart key, or a warning sound is generated through the speaker so that the failure of the motion detection part can be intuitively identified. There is an effect of warning a failure of the motion sensing unit by generating a warning sound through a speaker.

In particular, when it is determined that the motion detection unit of the smart key is broken, it is possible to fundamentally prevent hacking of the RSA by not sending a control signal to the vehicle, and even when the motion detection unit of the smart key is broken, the user can use the preset button It may be controlled to transmit a control signal to the vehicle through an input method.

1 is a schematic diagram showing a smart key system of a general vehicle;
Figure 2 is a schematic diagram showing an RSA hacking process for vehicle theft from the embodiment of Figure 1;
3 is a configuration diagram showing an embodiment of a smart key motion detection system according to the present invention;
4 is a flowchart illustrating a first control process of the smart key through the motion detection unit of the smart key from the embodiment of FIG. 3;
5 is a flowchart showing a second control process of the smart key through the motion sensor of the smart key from the embodiment of FIG. 3;
6 is a configuration diagram showing various embodiments of a motion failure warning unit from the embodiment of FIG. 3;
7 is a flow chart showing a third control process of a smart key through a motion failure warning unit together with a motion detection unit and a motion failure determination unit of the smart key from the embodiment of FIG. 5;
8 is a flowchart illustrating a fourth control process of a smart key through a motion failure warning unit together with a motion detection unit and a motion failure determination unit of the smart key from the embodiment of FIG. 5;
9 is a configuration diagram showing various embodiments of a vehicle warning of a failure of a motion sensing unit from the embodiment of FIG. 3;
FIG. 10 is a perspective view showing the embodiment of FIG. 9 inside a vehicle.

Hereinafter, an embodiment of a smart key motion detection system according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 3, the smart key motion detection system according to the present invention includes a vehicle 100 and a smart key 200, and the smart key 200 includes a key body 210 and a transceiver 220 , A control unit 230, a motion detection unit 240, a motion failure determining unit 250 and a motion failure warning unit 260 are included. In addition, the motion failure warning unit 260 may be a flashing light 261, a display 262, or a speaker 263 as shown in FIG. 6, and the vehicle 100 has as shown in FIGS. Similarly, the cluster 110, the center fascia 120, the HUD 130, and the vehicle speaker 140 may be included.

As shown in FIG. 3, the vehicle 100 refers to driving by driving wheels for the purpose of transporting people or cargo, and includes all vans, trucks, special vehicles, and two-wheeled vehicles other than the passenger cars shown in the drawing. The vehicle 100 includes various sensors such as speed and acceleration sensors, and drives each engine or device in addition to general structures such as an engine, power transmission device, body, suspension device, steering device, brake device, wheel/tire, and electric device. Various driving devices and other devices are provided to do so.

In the present invention, a driver approaches the vehicle 100 while holding the smart key 200 under a general control process of the vehicle 100 in which the smart key system is built, and wireless communication is performed between the vehicle 100 and the smart key 200. After determining whether or not to have been authenticated and whether or not to deviate from the operating distance through communication, a control signal corresponding thereto is transmitted to the vehicle 100 .

That is, as shown in FIG. 3 , the smart key 200 includes a key body 210 that the user can hold and operate, a transceiver 220 wirelessly communicating with the vehicle 100, and the key body. The key body ( 210) includes a control unit 240 that determines whether or not a motion is detected and transmits a control signal corresponding thereto.

In the wireless communication between the vehicle 100 and the smart key 200, the control unit 240 through the transceiver 220 determines whether or not the control unit 240 has been authenticated and whether or not the operating distance is out of range by using an individual identification code as a low frequency (LF) or It can be transmitted and received as a radio frequency (RF) signal, and for the operation of the vehicle 100, the user holds the smart key 200 to transmit and receive control signals through button input, etc. It can perform trunk opening/closing control and ignition on/off driving. In addition, the vehicle 100 recognizes the location of the smart key 200 through a plurality of antennas and can determine whether it is inside or outside the vehicle 100 as well as an accurate location outside.

However, as shown in FIG. 2, despite the fact that the actual smart key 200 is located outside the operating distance of the vehicle 100, the LF signal of the vehicle 100 is hacked and amplified through RSA, so that the remote Theft of the vehicle 100 occurs by transmitting the control signal to the vehicle 100 by transmitting it to the smart key 200 . In order to prevent this, as shown in FIGS. 3 to 5 , a motion detection unit ( 230) is provided.

The motion detection unit 230 is a sensor that detects the movement of the key body 210, and includes at least one of an earth magnetic sensor, an acceleration sensor, and a gyro sensor, and the user grips the key body 210. When the movement of the key body 210 to be operated occurs, the motion change of the key body 210 is measured and the measured motion value is generated.

Accordingly, as shown in FIG. 4 , the control unit 240 determines whether authentication is performed and whether or not the operating distance is out of range based on the electrical signal received from the transmission/reception unit 220, and the motion detection unit 230 detects the It is determined whether the movement of the key body 210 is detected and a corresponding control signal is transmitted or, as shown in FIG. In this case, it is possible to determine whether the smart key 200 has been authenticated and whether or not it has deviated from the operating distance, and control to transmit a control signal corresponding thereto.

For example, in relation to determining whether the smart key 200 has been authenticated and whether or not the operating distance has deviated, the control unit 240 responds to the control signal transmitted to the vehicle 100, as shown in FIGS. 4 and 5, respectively. If it is not received within a predetermined time, it is determined that it is out of working distance, and if an authentication failure signal is received for the control signal transmitted to the vehicle 100, it is determined that it is authentication failure. In addition, when the response to the control signal transmitted to the vehicle is received within a predetermined time, the control unit 240 determines that the control signal transmitted to the vehicle 100 is within an operating distance, and receives an authentication success signal for the control signal transmitted to the vehicle 100. In this case, it is judged as authentication success.

However, there may be a difference between the motion detection unit 230 and the prior and subsequent processes of determining whether or not to authenticate and whether or not to deviate from the operating distance. First, as shown in FIG. Only when it is determined that it is successful and within the operating distance and the motion of the key body 210 is sensed from the motion sensing unit 230, a control signal corresponding thereto can be controlled to be transmitted. Next, as shown in FIG. 5 , the control unit 240 determines whether the smart key 200 has been authenticated and whether or not the operation distance has been deviated only when the motion of the key body 210 is detected by the motion detection unit 230 . It can also be controlled to transmit a control signal corresponding to this by determining.

That is, after first determining the movement of the smart key 200 by the motion sensing unit 230, whether to determine whether to authenticate and whether to deviate from the operating distance, and after determining whether to authenticate and whether to deviate from the operating distance, the motion detecting unit 230 The control process can be divided into whether to transmit a control signal by determining the movement of the smart key 200 by ). In both cases, when there is no movement of the smart key 200 by the motion detection unit 230, authentication failure and departure from the operating distance, it is the same that the control signal is not transmitted to the vehicle 100, but the smart key 200 Differences occur before and after judgment in the control process.

In other words, when the movement of the smart key 200 is determined first, if there is no movement of the smart key 200, the smart key 200 does not receive a signal from the vehicle 100 at all, and authentication and operation It means that there is no determination of whether or not the distance has deviated, and when it is first determined whether authentication is successful and whether or not the operating distance is deviated, the movement of the smart key 200 is judged only when the authentication is successful and within the operating distance, and a control signal is transmitted only when there is movement. The difference lies in doing it.

As a result, the movement of the final smart key 200 occurs in both cases, and the corresponding control signal is transmitted to the vehicle 100 only when the authentication is successful and within the working distance.

Therefore, in normal times, when a user wants to use the smart key 200, the movement of the smart key 200 occurs through an action such as holding the smart key 200 and pressing the button 270, and the motion accordingly. The motion of the smart key 200 is sensed by the sensor 230 . At this time, when the authentication with the vehicle 100 succeeds and the motion of the smart key 200 is detected within the operating distance, a control signal corresponding thereto is transmitted to the vehicle 100 .

However, when the smart key 200 fails to authenticate with the vehicle 100 and departs from the operating distance, a control signal corresponding thereto is not transmitted to the vehicle 100 . However, even though the actual smart key 200 fails to authenticate with the vehicle 100 and is outside the operating distance, the actual user does not use the smart key 200 when hacking is attempted through RSA, so the motion detection unit Theft of the vehicle 100 can be prevented by preventing the motion of the smart key 200 through 230 from being detected so that a control signal corresponding thereto is not transmitted to the vehicle 100 .

At the time of hacking through the above-described RSA, vehicle theft can be prevented in advance through the motion detection unit 230 of the smart key 200, but if the motion detection unit 230 is broken, it cannot be confirmed. In order to prevent this, a motion failure determination unit 250 and a motion failure warning unit 260 may be further included as shown in FIGS. 6 to 8 .

The motion failure determination unit 250 determines whether the motion detection unit 230 is out of order. For example, as a self-diagnosis method, a method of artificially generating a certain motion value to check whether the corresponding motion value is normally recognized is checked, and as a register check method, a register for motion detection function setting is input and read again to determine whether it is the same as the input value. How to check, etc. Regardless of which method is used, it is sufficient if the motion failure determining unit 250 can determine whether the motion detection unit 230 is out of order.

The motion failure warning unit 260 warns whether the motion detection unit 230 is out of order through the motion failure determination unit 250 . For example, as shown in FIGS. 6 to 8 , when it is determined that the motion detection unit 230 is out of order, the motion failure warning unit 260 provides a blinking light 261 installed on the smart key 200 and flickers or a warning. It may be a display 262 that displays or a speaker 263 that generates a warning sound. Whatever warning means is used, it is sufficient if the motion failure warning unit 260 can display or inform the outside of the failure of the motion detection unit 230 .

On the other hand, since the user usually puts the smart key 200 in a pocket or bag of clothing and does not check it for several days, the motion failure warning unit 260 is not displayed or notified, but the user inside the vehicle 100 It is necessary to display or notify the failure of the motion sensing unit 230 even when the driver is on board.

To this end, the vehicle 100, when it is determined that the motion detection unit 230 of the smart key 200 is out of order, as shown in FIGS. 9 and 10, the cluster 110, the center fascia 120 or the HUD ( 130) or generate a warning sound through the vehicle speaker 140.

Through the motion failure determination unit 250 and the motion failure warning unit 260, it is possible to check whether the motion detection unit 230 is out of order early. In order to prevent theft, when the motion detection unit 230 is out of order, it is necessary to not transmit the control signal of the smart key 200, and even when the motion detection unit 230 is out of order, a control signal is transmitted when necessary by the user. You also need to send.

To this end, the smart key 200 prevents transmission of a control signal to the vehicle 100 when it is determined that the motion detection unit 230 is out of order, so that the operation of the vehicle 100 is prevented even when hacking is attempted through RSA. prevent it from happening

In addition, when the control signal is not transmitted to the vehicle 100 due to a failure of the motion sensing unit 230, the smart key 200 is controlled to transmit a control signal to the vehicle 100 using a preset button input method. This allows the user to operate the vehicle 100 when necessary.

For example, through a button input method such as long pressing a specific button 270 of the smart key 200 for a certain period of time or simultaneously pressing one or two or more buttons 270, the motion sensor 230 temporarily for a certain period of time only. ) can transmit a control signal to the vehicle 100 even when it is out of order.

As described above, the smart key motion detection system according to the present invention hacks the wireless communication between the vehicle 100 and the smart key 200 to prevent theft of the vehicle 100. Even when the motion detection unit 230 of the 200 is out of order, the motion detection unit 230 of the smart key 200 is checked for failure through the motion failure determination unit 250 and the motion failure warning unit 260. 230) has an effect of preventing theft of the vehicle 100 by blocking the transmission of the control signal in advance in the event of a failure.

In addition, the motion failure warning unit 260 is externally displayed through the flashing lamp 261 or the display 262 of the smart key 200 or a warning sound is generated through the speaker 263 to intuitively monitor the motion detection unit 230. Failure of the motion detection unit 230 can be confirmed by displaying it on the cluster 110, center fascia 120 or HUD 130 of the vehicle 100 or by generating a warning sound through the vehicle speaker 140. has the effect of warning.

In particular, when it is determined that the motion detection unit 230 of the smart key 200 is out of order, it is possible to fundamentally prevent hacking of RSA by not transmitting a control signal to the vehicle 100, and Even when the motion sensing unit 230 is out of order, it may be controlled to transmit a control signal to the vehicle 100 through a preset button input method when the user needs it.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and change the technical spirit of the present invention in various forms. Therefore, such improvements and changes will fall within the protection scope of the present invention as long as they are obvious to those skilled in the art.

100: vehicle
110: cluster 120: center fascia
130: HUD 140: vehicle speaker
200: smart key
210: key body 220: transceiver
230: motion detection unit 240: control unit
250: motion failure determination unit
260: motion failure warning unit 261: flashing light
262: display 263: speaker
270: button

Claims (10)

In a smart key system including a vehicle and a smart key that wirelessly communicates with the vehicle to determine whether authentication and whether the operation distance is out of range, and transmits a control signal corresponding thereto to the vehicle,
The smart key,
A key body that can be grasped and operated by a user, a transmission/reception unit that wirelessly communicates with the vehicle, a motion detection unit that senses the movement of the key body, and authentication or operation based on electrical signals received from the transmission/reception unit. A control unit for determining whether a distance has deviated and whether or not the movement of the key body is sensed from the motion sensing unit, and transmitting a corresponding control signal; a motion failure determining unit for determining whether the motion sensing unit is out of order; A motion failure warning unit for warning whether or not the motion detection unit has failed through a determination unit;
The control unit,
If a response to the control signal transmitted to the vehicle is not received within a predetermined time, it is determined that the operation distance has deviated, and if an authentication failure signal is received for the control signal transmitted to the vehicle, it is determined that authentication has failed,
When a response to the control signal transmitted to the vehicle is received within a predetermined time, it is determined that the operation distance is within the range, and when an authentication success signal is received for the control signal transmitted to the vehicle, it is determined that the authentication is successful,
Only when the movement of the key body is detected by the motion detection unit, it is determined whether the smart key is authenticated and whether the operation distance is out of range, and a control signal corresponding thereto is transmitted;
The smart key,
If it is determined that the motion detection unit is out of order, control not to transmit a control signal to the vehicle to prevent hacking of RSA, and if the control signal is not transmitted to the vehicle due to a failure of the motion detection unit, a preset button input method Smart key motion detection system, characterized in that for controlling to transmit the control signal to the vehicle for a predetermined time.
delete delete delete delete delete According to claim 1,
The motion failure warning unit,
Smart key motion detection system, characterized in that the blinking light installed on the smart key and flickering when it is determined that the motion sensing unit is out of order.
According to claim 1,
The motion failure warning unit,
Smart key motion detection system, characterized in that the display is installed on the smart key and displayed when it is determined that the motion sensing unit is out of order.
According to claim 1,
The motion failure warning unit,
Smart key motion detection system, characterized in that the speaker installed in the smart key to generate a warning sound when the motion detection unit is determined to be out of order.
According to claim 1,
the vehicle,
The smart key motion detection system, characterized in that when it is determined that the motion detection unit of the smart key is broken, display on the cluster, center fascia or HUD or generate a warning sound through a vehicle speaker.

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