KR100966526B1 - A noncontact type door lock system and its control method - Google Patents

Abstract

The present invention relates to a contactless door lock system, a door key and a base station used therein, and a control method thereof. In one aspect of the present invention, the door key 100 is used as a door key activation signal for activating itself by receiving the LF beacon signal transmitted from the base station 200 in a mutually inductive manner, the door key activation signal Accordingly, power is supplied from the built-in power supply 150 to transmit authentication information for the door lock control as an RF signal, and the base station 200 transmits the LF beacon signal to the door key 100, and the door key And receiving the authentication information received from the unit 100 in the RF signal, and generating a signal for door lock control by comparing the authentication information with the authentication information stored therein.

According to an aspect of the present invention, since the present invention activates the door key by receiving the LF beacon signal from the base station in a mutually inductive manner, there is an effect that can reduce the power consumption of the door key, RF authentication information after activation By transmitting as a signal, there is an effect that the door key can automatically open and close the door lock at a greater distance. In addition, according to an aspect of the present invention, the present invention can adjust the signal strength of the LF beacon signal in the base station, there is an effect that can adjust the door opening and closing distance in the door lock system.

Contactless, Door Lock, Door Key, LF Module, RF Module, RFID, Mutual Guidance

Description

Non-contact door lock system and its control method {A NONCONTACT TYPE DOOR LOCK SYSTEM AND ITS CONTROL METHOD}

The present invention relates to a non-contact door lock system in which the opening and closing of the door lock in charge of opening and closing of the door is made in a non-contact manner, and a door key used in such a door lock system, and a base station for transmitting and receiving information with the door key. The present invention also relates to a control method of such a door lock system.

Locking devices are installed in the home or office to restrict access or prevent unauthorized entry by outsiders. Such locks are manufactured in various forms, from simple low-cost locks to expensive mechanical devices with complex mechanical mechanisms, and mechanical and electronic door lock systems in which mechanical mechanisms are combined with electronic technology.

Background Art Mechanical and electronic door lock systems are widely used as door lock systems using keypad input systems and card type door lock systems using cards such as magnetic cards, radio frequency (RF) cards, and integrated circuit (IC) cards. Most card-type door lock systems are stored with authentication information encoded to determine whether or not to allow access to the inside of the card, and opening and closing the door lock by reading the authentication information inside the card through a card reader.

On the other hand, the mechanical and electronic door lock system may be largely divided into a contact type and a non-contact type. In the case of the contact type, the door lock is released by contacting a door key corresponding to the base station mounted on the door. However, in the case of the contact type, in order to open and close the door lock, the door key must be taken out of the user's pocket or the like to be in direct contact. Therefore, when foreign matter is on the user's hand or when holding the object in both hands, there is a cumbersome point, because it takes some time to perform the contact process, there is a point that opening and closing the door lock is not quick.

Therefore, such a contact door lock system is gradually developing into a non-contact door lock system. In the non-contact door lock system, the base station receives authentication information from the door key to open and close the door lock. However, in the non-contact door lock system, the door key may not always transmit its authentication information due to the problem of power consumption. The door key should transmit authentication information only at the request of the base station or when the base station is in close proximity. One way to satisfy this is to use a method in which the base station transmits a constant beacon signal, and the door key transmits authentication information only when receiving a beacon signal. However, even in this manner, the base station must operate the transmitting circuit to transmit the beacon signal all the time, and the door key must always operate the receiving circuit to receive the beacon signal, which is a problem of power consumption in both the base station and the door key. There is.

On the other hand, the RFID method is used to solve the power consumption problem of the door key. The door key operates like a tag in an RFID scheme, and the door key accumulates power from radio waves received from the base station, and then transmits its authentication information using the power. However, because the base station also uses batteries in many cases, there is a limit on the power used, a limit on the power that the door keys can receive and use for transmission, and a limitation on the size of the receive antenna that the base station can use. Due to this and the like, the distance between the door key and the base station in the RFID method can not be far away, it can only operate within a few centimeters to tens of centimeters. For example, it is impossible to automatically open and close the door lock when the user is close to the door while the user puts the door key in the pocket.

The present invention has been made to solve the above problems, and has the object of the invention illustrated below, and also has the object of the invention that is apparent from the description of the structure of the other invention.

The present invention is to provide a non-contact door lock system that can open and close the door lock without contacting the door key to the door lock system, a door key and a base station used therein, and a control method thereof.

The present invention also provides a non-contact door lock system capable of reducing power consumption, a door key and a base station used therein, and a control method thereof.

In addition, the present invention is a non-contact door lock system that can automatically open and close the door lock at a greater distance, while the power consumption of the base station or door key used in the door lock system, and the door key and base station used therewith; To provide a control method thereof.

In addition, the present invention is a non-contact door lock system that can automatically open and close the door lock, the door used therein, even if the power consumption of the base station or door key used in the door lock system is small, the user only has access to the door key It is to provide a key and a base station and a control method thereof.

Another object of the present invention is to provide a non-contact door lock system that can adjust the door opening and closing distance in the door lock system, a door key and a base station used therein, and a control method thereof.

It is also an object of the present invention to provide a non-contact door lock system having security, stability and speed, a door key and a base station used therein, and a control method thereof.

According to an aspect of the present invention, the present invention, the LF module 110 for receiving the LF beacon signal transmitted from the base station 200 used in the contactless door lock system in a mutually inductive manner to output a door key activation signal; An RF module 120 including authentication information for controlling the door lock used in the contactless door lock system in the RF signal and transmitting the RF signal to the base station 200; A control unit 130 for controlling to provide the authentication information to the RF module 120; It characterized in that it comprises a power supply unit 150 for supplying power to at least the control unit 130 and the RF module 120 on the basis of the presence of the door key activation signal.

According to one aspect of the invention, the present invention, the LF module 210 for transmitting the LF beacon signal for activating the door key 100 used in the contactless door lock system; As the door key 100 is activated by receiving the LF beacon signal in a mutually inductive manner, RF module 220 for receiving the authentication information transmitted from the door key 100 included in the RF signal; And a control unit 230 for generating a signal for door lock control by comparing the authentication information received from the RF module 220 with the authentication information stored in the base station.

According to an aspect of the present invention, the present invention, by receiving the LF beacon signal transmitted from the base station 200 in a mutually inductive manner to generate a door key activation signal, stored in itself according to the door key activation signal A door key 100 that transmits authentication information for door lock control as an RF signal using the power that has been provided; The LF beacon signal is transmitted to the door key 100, the authentication information received from the door key 100 is included in the RF signal, and the authentication information is stored in the RF signal. It characterized in that it comprises a base station 200 for generating a signal for the door lock control.

According to one aspect of the invention, the present invention, the base station 200, the first step of transmitting a LF beacon signal; A second step of activating a door key 100 by receiving the LF beacon signal in a mutually inductive manner; A third step of transmitting the authentication information for the door lock control by the door key 100 as a condition that the door key 100 is activated in the second step; A fourth step in which the base station 200 receives the authentication information transmitted from the door key 100; And a fifth step of generating a signal for door lock control by comparing the authentication information received in the fourth step with the authentication information stored in the base station 200.

According to an aspect of the present invention, the present invention transmits the authentication information for opening and closing the door lock as an RF signal and generates a signal for opening and closing the door lock by comparing the authentication information with the authentication information stored in the base station, There is an effect that the door lock can be opened and closed without contacting the door lock system.

In addition, according to an aspect of the present invention, since the base station activates the base station when the base station detects the approach of the human body or the body is detected, there is an effect of reducing the power consumption of the base station.

In addition, according to an aspect of the present invention, since the present invention activates the door key by receiving the LF beacon signal from the base station in a mutually inductive manner, there is an effect that can reduce the power consumption of the door key.

In addition, according to an aspect of the present invention, the present invention, by receiving the LF beacon signal from the base station in a mutually inductive manner to activate the door key, after activation the authentication information using the power of the power supply unit embedded as an RF signal Because of the low power consumption, the door key can automatically open and close the door lock at a greater distance.

In addition, according to an aspect of the present invention, since the signal strength of the LF beacon signal can be adjusted in the base station, there is an effect that can adjust the door opening and closing distance in the door lock system.

Hereinafter, a non-contact door lock system and a control method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a door key 100 in a contactless door lock system according to an embodiment of the present invention, Figure 2 is a block diagram of a base station 200 in a contactless door lock system according to an embodiment of the present invention It is shown.

The door key 100 includes a controller 130, an LF module 110, an RF module 120, a flash memory 140, and a power supply 150.

The LF module 110 of the door key 100 and the LF module 210 of the base station 200 operate in an RFID manner. The LF module 110 of the door key 100 operates similar to the tag in the RFID method, and the LF module 210 of the base station 200 operates similar to the transmitter of the reader in the RFID method.

In general, there are two types of wireless access schemes in which RFID operates. The mutual induction method installs coil antennas on the reader and the tag, transmits the energy necessary for the operation of the tag from the reader to the tag, and transmits information between each other. The coil antenna of the reader generates a time-varying magnetic field, and a portion of the emitted magnetic field passes through an area formed by the coil antenna of the tag away from the reader, and generates electromotive force in the coil antenna of the tag.

According to an embodiment of the present invention, the LF module 110 of the door key 100 and the LF modules 110 and 210 of the base station 200 transmit and receive LF beacon signals in a mutually inductive manner. Coil antennas are built into the LF modules 210 and 110 of the base station 200 and the door key 100, and a capacitor is connected to the coil antenna of the LF module 110 of the door key 100 to the coil antenna. The capacitor constitutes a resonant circuit for a particular frequency. Accordingly, the LF beacon signal may be transmitted to the LF module 110 of the door key 100, and with respect to other components in the door key 100, a voltage that may be a stimulus signal, a turn-on signal or a gate signal may be applied. You can get it. The LF beacon signal is a low frequency signal (LF) and corresponds to a kind of beacon signal. For example, the frequency of the LF beacon signal is 125 kHz to 140 kHz. The LF beacon signal has a purpose for activating the door key 100, and may not include any information. In another embodiment, in order to confirm that the door key is its relative base station, the LF beacon signal may be transmitted including information such as a serial number assigned to the door key and the base station pair. The serial number need not be unique for a particular door key and base station pair. Although the door key is not an exact counterpart base station, in order to consume less power, the door key and base station pairs may be grouped and given a serial number for each group.

The LF module 110 of the door key 100 receives the LF beacon signal transmitted from the base station 200 in a mutually inductive manner and outputs a door key activation signal therefrom. By using the mutual induction method, it is not necessary to use its own power or extremely fine power to output the door key activation signal. In one embodiment, the LF module 110 of the door key 100 measures a received signal strength indication (RSSI) of the received LF beacon signal, and the measured received signal strength (RSSI) is set to a value. In case of abnormality, the door key activation signal may be output. The received signal strength (RSSI) is an index indicating the strength of a received signal, and the closer the distance between two communicating objects is, the larger the value is. Each component of the door key 100 is activated according to the door key activation signal. For example, power is supplied to the controller 130, the flash memory 140, and the like of the door key 100.

The RF module 120 transmits authentication information of the door key 100 as an RF signal. The RF signal uses, for example, an ISM band. RF signals can transmit more information more quickly and accurately than LF beacon signals.

The power supply unit 150 of the door key 100 is for supplying power to each component of the door key 100, the power supply unit 150 includes a battery therein. The power supply unit 150 may or may not supply power to each component of the door key 100, that is, the controller 130, the flash memory 140, or the RF module 120. The power supply unit 150 does not normally supply power to the RF module 120, the control unit 130, and the flash memory 140, and the RF module 120 and the control unit are configured based on the existence of the door key activation signal. Power may be supplied to the 130 and the flash memory 140.

As an embodiment, if the door key activation signal is present, the controller 130, the flash memory 140, and the RF module 120 may be supplied with power. In another embodiment, if the door key activation signal is present, power is supplied to the control unit 130 and the flash memory 140 immediately, and the corresponding base station is based on information such as a serial number included in the LF beacon signal. After it is confirmed at 200, the RF module 120 may be supplied with power. In any case, power is supplied to the RF module 120, the controller 130, and the flash memory 140 with the presence of the door key activation signal as a necessary condition. "Present the presence of a door key activation signal" includes both immediate as soon as the condition is satisfied and non-immediate use of the later establishment of the condition.

The flash memory 140 of the door key 100 stores authentication information to be transmitted to the base station 200 for the control of the door lock, and a serial number for identifying a pair of the door key 100 and the base station 200. You can also save it.

The controller 130 of the door key 100 exchanges signals with the LF module 110, the RF module 120, the controller 130, and the flash memory 140 of the door key 100, and controls them. The controller 130 is activated according to the door key activation signal. After activation, the controller 130 reads authentication information for the door lock control from the flash memory 140 and provides it to the RF module 120.

The base station 200 includes a controller 230, an LF module 210, an RF module 220, a flash memory 240, a power supply unit 250, a detection sensor 260, and a door lock control unit 270.

The LF module 210 of the base station 200 transmits an LF beacon signal for activating the door key 100. Specific contents of the LF beacon signal are the same as described above. However, the LF module 210 may adjust the strength of the transmitted LF beacon signal. The method of adjusting the strength of the LF beacon signal may be various embodiments, and may be adjusted according to the control of the controller 230, or may adjust the value of resistance, inductance, or capacitance in a circuit within the LF module 210. It can also be configured by the user's direct operation by configuring the device and its adjustment knob (not shown). The door key 100 is determined when the door key 100 is activated according to the received signal strength RSSI. Then, by adjusting the strength of the transmitted LF beacon signal, there is an effect that the user can adjust the door opening and closing distance between the door key 100 and the base station 200.

 The RF module 220 of the base station 200 receives the authentication information transmitted from the door key 100 in the RF signal. The authentication information is information transmitted as the door key 100 is activated by the LF beacon signal.

The flash memory 240 of the base station 200 stores authentication information for authenticating the door key 100. The controller 230 of the base station 200 compares the authentication information received from the RF module 220 with the authentication information stored in the base station to generate a signal for door lock control and provide the signal to the door lock control unit 270. do. The door lock control unit 270 directly controls the door lock.

The sensor 260 of the base station 200 is for detecting a human body or a moving object (body). In one embodiment, the sensor 260 may be a far-infrared sensor, and detects the far-infrared rays generated from the human body to detect that the human body is approaching to output a base station activation signal. As another embodiment, the detection sensor 260 may be an ultrasonic sensor, and the ultrasonic sensor may include an ultrasonic generator and an ultrasonic receiver to generate ultrasonic waves and detect the reflected ultrasonic waves. For example, if there is a moving object (moving body) in a certain area, there will be a change in the waveform of the received ultrasonic wave, and the ultrasonic sensor detects this and outputs the base station activation signal. The above sensors may be implemented in combination of the two according to the implementation place, environment, etc. of those skilled in the art.

The power supply unit 250 of the base station 200 supplies power to each component of the base station 200, and the LF module 210 and the RF module 220 with the presence of the base station activation signal as a requirement. ), The flash memory 240, the controller 230, and the door lock controller 270. In the standby state (normally), power is not supplied to the LF module 210, the RF module 220, the flash memory 240, the control unit 230, and the door lock control unit 270 (power is applied only to the detection sensor 260). }. When the sensor 260 outputs a base station activation signal, it supplies power to these components.

The controller 270 of the base station 200 exchanges signals with each component of the base station 200 and performs a function of controlling each component. When the base station activation signal is present, the LF module 210 transmits the LF beacon signal, and the RF module 220 controls the reception to be possible.

The door lock controller 270 of the base station 200 receives a signal for door lock control from the controller 230 and generates a signal for opening and closing an actual door lock. The door lock may include a solenoid or a motor, and the door lock control unit 270 supplies a current for driving the solenoid or the motor.

3 is a view showing a control method of a non-contact door lock system according to an embodiment of the present invention.

First, the sensor 260 of the base station 200 determines whether there is an approach or moving object of the human body (S211). As a result of the determination of step S211, if there is an approach or moving object of the human body, the flow proceeds to step S212, where the base station 200 supplies power to its RF module 220 to be in a reception state, and its own LF module. In 210, the LF beacon signal is transmitted (S212). The LF beacon signal is a low frequency signal (LF) and corresponds to a kind of beacon signal. The LF beacon signal has a purpose for activating the door key 100, and may not include any information. Meanwhile, in another embodiment, in order to confirm that the door key is its counterpart base station, the LF beacon signal may be transmitted including information such as a serial number assigned to the door key and the base station pair.

On the other hand, the door key 100 is normally in an inactive state, and in the inactive state of the door key 100, for example, the power to the control unit 130, the flash memory 140 and the RF module 120 of the door key 100. It is not fed. The LF module 110 receives the LF beacon signal through the RFID mutual induction method and outputs the door key activation signal. Accordingly, even if the door key 100 does not use its own power or uses only extremely fine power, the LF beacon signal It is possible to output the door key activation signal by receiving the signal.

The door key 100 activates the door key 100 as a condition for receiving the LF beacon signal. In one embodiment, the door key 100 determines whether the received signal strength indication (RSSI: Received Signal Strength Indication) of the received LF beacon signal has reached a threshold (S112), and if so, proceeds to step S113. If 100 is not activated, the flow returns to step S111. In order to activate the door key 100, the LF module 110 of the door key 100 outputs a door key activation signal. In one embodiment, activating the door key 100 supplies power to the controller 130 and the flash memory 140 of the door key 100. On the other hand, in another embodiment, activating the door key 100 supplies power to the RF module 120 as well as the control unit 130 and the flash memory 140 of the door key 100. {In this case, Steps S114 and S116 below may be omitted.

In step S114, it is determined whether the received LF beacon signal is a signal of the symmetric base station 200. If the signal of the base station 200 is symmetric, the process proceeds to step S115 to activate the RF module 120, and symmetry. If the signal is not from the base station 200, the process returns to step S111. In this embodiment, the LF beacon signal includes information such as a serial number assigned to the door key and the base station pair. In step S117, the door key 100 transmits authentication information for door lock control. Specifically, the RF module 120 of the door key 100 carries the authentication information on the RF signal and transmits it.

The door key 100 transmits authentication information for door lock control on the condition that the door key 100 is activated. "The requirement that the door key 100 be activated" means that authentication information for door lock control is transmitted only when the door key 100 is in an activated state. This may be in addition to transmitting authentication information as the door key 100 is activated, and transmitting the authentication information after another condition is satisfied or another operation is performed after the door key 100 is activated. In this case, however, the door key 100 is activated on the premise.

On the other hand, the base station 200 receives the authentication information transmitted from the door key 100 (S213). In addition, the base station 200 compares the received authentication information with the authentication information stored in the base station 200 to generate a signal for door lock control, for example, a door lock release signal. Specifically, the base station 200 searches for the authentication information in the flash memory 240, and compares the received authentication information with the retrieved authentication information and generates a signal for door lock control, for example, a door lock release signal.

It will be appreciated that the present invention can be implemented in a modified form within the scope of the claims of the present invention and the specific details for the practice of the present invention.

1 shows a block diagram of a door key 100 in a non-contact door lock system according to an embodiment of the present invention.

Figure 2 shows a block diagram of a base station in a non-contact door lock system according to an embodiment of the present invention.

3 is a view showing a control method of a non-contact door lock system according to an embodiment of the present invention.

DESCRIPTION OF REFERENCE NUMERALS

100 ... Doorkey 200 ... Base Station

110, 210 ... LF module 120, 220 ... RF module

130, 230 ... control unit 140, 240 ... flash memory

150, 250 ... Power 260 ... Detection sensor

270 ... door lock control

Claims (11)

An LF module 110 for receiving the LF beacon signal transmitted from the base station 200 used in the non-contact door lock system in a mutually inductive manner and outputting a door key activation signal; An RF module 120 including authentication information for controlling the door lock used in the contactless door lock system in the RF signal and transmitting the RF signal to the base station 200; A control unit 130 for controlling to provide the authentication information to the RF module 120; A power supply unit 150 supplying power to at least the control unit 130 and the RF module 120 based on the presence of the door key activation signal; Door keys for use in a contactless door lock system comprising a. An LF module 210 for transmitting an LF beacon signal for activating the door key 100 used in the contactless door lock system; As the door key 100 is activated by receiving the LF beacon signal in a mutually inductive manner, RF module 220 for receiving the authentication information transmitted from the door key 100 included in the RF signal; A control unit 230 for generating a signal for door lock control by comparing the authentication information received from the RF module 220 with the authentication information stored in the base station; Base station used in the contactless door lock system comprising a. The method according to claim 2, A detection sensor 260 that detects an approach of a human body or detects a body and outputs a base station activation signal; A power supply unit 250 for supplying power to at least the LF module 210 and the RF module 220 based on the presence of the base station activation signal; The base station used in the contactless door lock system further comprises. The method according to claim 2, In the LF module 210 transmits the LF beacon signal, And base signal strength of said LF beacon signal can be adjusted. Receives the LF beacon signal transmitted from the base station 200 in a mutually inductive manner to generate a door key activation signal, and authentication information for door lock control using power stored in itself according to the door key activation signal. Door key 100 for transmitting as an RF signal; The LF beacon signal is transmitted to the door key 100, the authentication information received from the door key 100 is included in the RF signal, and the authentication information is stored in the RF signal. A base station 200 generating a signal for door lock control; Contactless door lock system comprising a. The method according to claim 5, The base station 200, Contactless door lock system, characterized in that the self is activated by sensing the approach of the human body or the body. The method according to claim 5, The base station 200, In transmitting the LF beacon signal, the non-contact door lock system, characterized in that the signal strength of the LF beacon signal can be adjusted. The method according to claim 1, The control unit 130 is a door key used in the contactless door lock system, characterized in that the base station is included in the LF beacon signal to determine whether the base station is correct according to the received. The method according to claim 5, The door key (100) is a non-contact door lock system, characterized in that it further has a function to check whether the other party's base station according to the received serial number included in the LF beacon signal. Transmitting a LF beacon signal from the base station 200; A second step of activating a door key 100 by receiving the LF beacon signal in a mutually inductive manner; A third step of transmitting the authentication information for the door lock control by the door key 100 as a condition that the door key 100 is activated in the second step; A fourth step in which the base station 200 receives the authentication information transmitted from the door key 100; A fifth step of generating a signal for door lock control by comparing the authentication information received in the fourth step with the authentication information stored in the base station 200; Control method of a non-contact door lock system comprising a. The method according to claim 10, In the third step, as a requirement for the door key 100 to transmit authentication information for the door lock control, a requirement that the received serial number included in the LF beacon signal matches the serial number of the other base station is more. The control method of the contactless door lock system, characterized in that.

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