KR20180052877A - Door lock device using the visible light communication system based on LED-ID technology - Google Patents

Abstract

The present invention relates to a door lock device using a visible light communication (VLC)-based LED-ID technique, and more specifically, to a door lock device using a VLC-based LED-ID technique which can automatically open and close a door lock through optical camera communication (OCC) and VLC by using light emitted by a flash or an LED and a display mounted in a conventional smartphone. The door lock device using a VLC-based LED-ID technique according to the present invention has the advantages of: preventing the leakage of a password, a password error, and the like due to a contact method of entering, in a touch manner, a preset password on a keypad provided on a digital door lock by applying OCC and VLC communication methods; being resistant to external optical noise; and solving a security problem such as hacking. Further, the door lock device of the present invention can be used in a hotel, an unmanned hotel, private locker rooms of a fitness center, and the like, as well as in a family home, thereby eliminating the requirement of an information desk and a resident workforce.

Description

[0001] The present invention relates to a door lock device using a visible light communication based LED-ID technology,

[0001] The present invention relates to a door lock device using LED-ID technology based on visible light communication, and more particularly, to a door lock device using an LED (Light Emitting Diode) The present invention relates to a door lock apparatus using LED-ID technology based on visible light capable of automatically opening / closing a door lock through communication.

Generally, the digital door lock is unlocked by a password input, fingerprint recognition, or contact or proximity of an electronic key such as an RFID card or a bus card.

A conventional general digital door lock has a keypad for inputting numbers on the front side, and is opened or closed when a person presses a password.

However, when the door lock is opened or closed by inputting the password, the password is easily exposed to others, and the fingerprint or the like remains on the keypad, resulting in a very low security. In addition, when the door lock is opened and closed by using the electronic key, there is an inconvenience that the user needs to have the electronic key separately.

Korean Patent Laid-Open No. 10-2003-0077824 (door lock system) discloses a technique for remotely controlling opening and closing operations of a door lock section using a remote controller, and Korean Patent Laid-Open No. 10-2003-0060864 (door lock interphone system using a relay ) Discloses a technique for connecting a door lock and a visitor's terminal using an external relay to confirm that a visitor is present even when a resident is absent, and to allow visitors to visit after confirming the identity of a visitor.

However, according to the conventional door lock system, there is a problem that a separate user must always possess a door lock for opening and closing the door lock. In the case of the door lock interphone system using the relay, not only the relay is installed separately, And the door lock is opened and closed after information is transmitted and received.

KR 10-2003-0077824 A KR 10-2003-0060864 A

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a door lock device capable of opening and closing door locks through OCC (Optical Camera Communication) and VLC And an object of the present invention is to provide a door lock apparatus using visible-light communication based LED-ID technology.

In addition, the present invention solves problems caused by a password leakage due to a contact-type method of touching and inputting a preset password on a keypad installed in a digital door lock by applying OCC and VLC communication methods, Another object of the present invention is to provide a door lock apparatus using LED-ID technology based on visible light capable of solving security problems such as strong and hacking.

According to an aspect of the present invention, there is provided a door lock apparatus using LED-ID technology based on visible light communication, comprising: an authentication information request unit for sending an authentication information request signal for requesting authentication information to a server; A first modulator for modulating the authentication information received by the authentication information receiver into a light control signal, a first modulator for modulating the light control signal modulated by the first modulator, A first demodulator for demodulating an optical signal received by the first image sensor, a second demodulator for demodulating the optical signal received from the first demodulator, 1 modulating unit and a first demodulating unit; A second authentication information receiving unit for receiving authentication information from the server when an authentication information request signal is received from the server, a second image sensor for receiving an optical signal generated from the outside, A comparison section for determining whether or not the information demodulated by the second demodulation section and the authentication information received by the second authentication information receiving section are identical to each other; A second modulator for modulating the additional information generated by the additional information generator into a light control signal, a second modulator for modulating the additional information generated by the additional information generator into a light control signal, And a second control unit for controlling the second demodulating unit, the door lock and the second modulating unit, and a second control unit for controlling the second modulating unit, the second modulating unit, And it characterized in that.

And the first light source unit and the second light source unit can selectively emit light having different wavelengths by the first control unit and the second control unit, respectively.

The first control unit controls the first light source unit so that light having a wavelength corresponding to a wavelength of light emitted from the second light source unit and received by the first image sensor can be emitted from the first light source unit .

And the second control unit controls the image captured by the second image sensor to be stored in real time in the additional information generating unit.

The door lock device using the LED-ID technology based on the visible light communication according to the present invention is a door lock device that uses a flash or an LED and a display light installed in an existing smart phone to transmit a door lock through OCC (Optical Camera Communication) and VLC (Visual Light Communication) There is an advantage that it can be opened and closed automatically.

In addition, the present invention solves problems caused by a password leakage due to a contact-type method of touching and inputting a preset password on a keypad installed in a digital door lock by applying OCC and VLC communication methods, It has the advantage of being able to solve security problems such as strong and hacking.

In addition, the present invention can be applied not only to general households, but also to a private locker room of a hotel, a non-Intel, a pit-knit center, and the like.

1 is a block diagram illustrating a configuration of a door lock apparatus using a visible light communication based LED-ID technology according to the present invention.
2 is a view illustrating a second image sensor of a door lock device using visible light communication based LED-ID technology according to the present invention.
3 is a view illustrating operation of a second image sensor of a door lock apparatus using a visible light communication based LED-ID technique according to the present invention.
4 is a view illustrating an image obtained by a second image sensor of a door lock apparatus using a visible light communication based LED-ID technique according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a door lock (250) device using a visible light communication based LED-ID technology according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 illustrate a door lock 250 device using a visible light communication based LED-ID technology according to the present invention. 1, a door lock 250 device using a visible light communication based LED-ID technology includes a user terminal unit 100, an open / close terminal unit 200, and a server 300.

The user terminal unit 100 is a user, and the user terminal unit 100 uses a general smart phone in a door lock unit 250 using a visible light communication based LED-ID technology according to the present invention.

The user terminal unit 100 includes an authentication information request unit 110, a first authentication information receiving unit 120, a first modulating unit 130, a first light source unit 140, a first image sensor 150, 1 demodulator 160, and a first controller 170.

The authentication information requesting unit 110 transmits an authentication information request signal for requesting authentication information to the server 300. The authentication information requesting unit 110 simultaneously transmits the authentication information request signal to the server 300, So that the authentication information request signal is transmitted. The authentication information request module is a general application program installed in a smart phone and is executed by a user's operation.

Although not shown in the figure, when the authentication information request unit 110 is located in an area or an area (designated position) designated by the user in advance, the authentication information request unit 110 automatically The authentication information request signal for requesting authentication information may be automatically transmitted to the mobile terminal 300. At this time, whether or not the user is located at the designated location can be determined based on the location information received from the GPS receiver unit included in the user terminal unit 100. For example, when the user designates the designated location as the home and then the user is located near the home (for example, several meters to several tens of meters), the authentication information request signal is sent so that the user It is possible to eliminate the troublesomeness that must be executed.

The first authentication information receiver 120 receives the authentication information from the server 300 and the received authentication information is transmitted to the first modulator 130 by the first controller 170. At this time, the authentication information transmitted to the first modulator 130 is transmitted in the form of binary data.

The first modulating unit 130 modulates the digital authentication information received by the first authentication information receiving unit 120 into an analog optical control signal. The optical control signal modulated through the first modulating unit 130 is a pulse or And the first light source unit 140 is turned on / off according to the electric signal.

For example, the first modulator 130 may perform an on-off keying (OOK) operation, a pulse amplitude modulation (OOK) operation, The corresponding authentication information can be modulated by PAM (Pulse Amplitude Modulation), Pulse Phase Modulation (PPM), and Pulse Width Modulation (PWM).

The first light source 140 is adapted to emit light according to a light control signal modulated by the first modulator 130, and may be a flash LED mounted on the rear surface of a smart phone and a front mounted display. The LED for flash emits white light, and the display can emit light of various colors, that is, light of various wavelengths. The first light source unit 140 may be driven by the first controller 170 or may be driven by the flash LED and may be determined by the additional information generated and transmitted by the additional information generator 260, have.

The first image sensor 150 receives a light generated from the outside such as illumination light or sunlight for illumination or an optical signal emitted from a second light source of an open / close terminal 200, which will be described later, To be applied. The first image sensor 150 may be a CCD or a CMOS image sensor, but the present invention uses a CMOS image sensor.

The first demodulating unit 160 demodulates an optical signal received from the first image sensor 150, that is, an optical signal transmitted from the second light source unit 280 of the open / close terminal 200, which will be described later. The demodulated information may be authentication information transmitted from the server 300 to the opening and closing terminal 200 or additional information generated by the additional information generating unit 260.

The first controller 170 controls the first demodulating unit 160 of the authentication information requesting unit 110, the first authentication information receiving unit 120, the first modulating unit 130 and the first image sensor 150, And the first demodulator 160 stores the demodulated information in the memory 180 mounted therein.

When the first controller 170 selects the display as the first light source 140, the first controller 170 may emit light of different wavelengths from the display.

The first controller 170 controls the operation of the first controller 170 and the second controller 170 so that the optical signal emitted from the second light source unit 280 of the open / close terminal unit 200 and having a wavelength corresponding to the wavelength of the optical signal received by the first image sensor 150 And controls the first light source unit 140 to be emitted from the first light source unit 140.

The opening and closing terminal unit 200 is installed in a door or the like and is responsible for opening and closing a door. The opening and closing terminal unit 200 includes a second authentication information receiving unit 210, a second image sensor 220, a second demodulating unit 230, A door lock 250, an additional information generating unit 260, a second modulating unit 270, a second light source unit 280, and a second control unit 290. [ The above components are embedded in the main body which is fixed to the door.

The second authentication information receiving unit 210 receives the authentication information request signal transmitted from the user terminal unit 100 from the server 300 when the server 300 receives the authentication information request signal. The second authentication information receiving unit 210 provides a criterion for comparing the authentication information requested by the user with the information obtained through the second image sensor 220 and the second modulating unit 270, (240).

Like the first image sensor 150, the second image sensor 220 receives an external light such as illumination light or solar light, or the external light such as sunlight, And is capable of receiving an optical signal emitted from one light source unit 140.

The second demodulation unit 230 demodulates the optical signal received by the second image sensor 220 and is demodulated in the same manner as the first demodulation unit 160. The information demodulated by the second demodulator 230 is an analog electric signal in the form of a pulse or a square wave. The electric signal demodulated by the second demodulator 230 is converted into binary data through general digital sampling and quantization.

The comparison and determination unit 240 determines whether the demodulated information in the second demodulation unit 230 is the same as the authentication information received in the second authentication information receiving unit 210. [

The door lock 250 is installed in a door, and the lock state is released so that the door can be opened according to the determination result of the comparison and determination unit 240, the lock state is maintained so that the door can be closed, (290).

The additional information generating unit 260 is for transmitting the additional information to the user terminal unit 100. The additional information generated by the additional information generating unit 260 is transmitted to the user terminal 100 through the authentication information received by the second authentication information receiving unit 210 Or image information received by the second image sensor 220 or other information.

The second modulator 270 modulates the additional information generated by the additional information generator 260 into a light control signal so as to transmit the additional information to the user terminal 100 through the second light source unit 280.

The second light source unit 280 emits light according to a light control signal modulated by the second modulator 270. In addition, the second light source unit 280 may include not only white light but also LED modules having R, G, and B LEDs to selectively or simultaneously emit light of different wavelengths. The second control unit 290 may include The light from the second light source unit 280 can be emitted in various colors.

The second control unit 290 controls operations of the second authentication information receiving unit 210, the second image sensor 220, the second demodulating unit 230, the door lock 250 and the second modulating unit 270, respectively .

The second control unit 290 receives the authentication information from the second authentication information receiving unit 210 and simultaneously transmits the second image to the second image receiving unit 210 in order to receive the optical signal transmitted from the first light source unit 140 of the user terminal unit 100. [ The second image sensor 220 may be operated at all times so that the second image sensor 220 can receive the light generated from the outside in real time regardless of whether the authentication information is received or not. In the latter case, the second controller 290 stores the optical signal received by the second image sensor 220, that is, the photographed image information, in the additional information generator 260 and transmits it to the second modulator 270 And controls the user terminal unit 100 to transmit corresponding image information through the second light source unit 280 so that the user can check it later.

Meanwhile, the second controller 290 controls the second image sensor to receive light by exposing the second image sensor to an optical signal transmitted from the first light source 140 through a rolling shutter system. In this method, the matrix-shaped pixels constituting the second image sensor 220 are divided into a plurality of pixel arrays and sequentially operated. That is, as shown in the figure, among the pixels arranged in X, Y, Are divided into a first pixel array to a Y pixel array (# 1 to # Y) along a horizontal direction.

As shown in the figure, the first pixel array to the Y pixel array (# 1 to # Y) are controlled to be sequentially exposed to the optical signal transmitted from the first light source unit 140, To be received. This sets the first pixel array to the Y pixel array (# 1 to # Y) as one pixel and the optical signals respectively received in the first to Y pixel arrays (# 1 to # Y) So that the optical signal transmitted from the first light source unit 140 is determined as binary data.

As shown in the figure, if the state of the optical signal transmitted from the first light source section is ON, only the first column of the second image sensor, that is, the first pixel array, is exposed and recognized, and if the state of the next optical signal is OFF, Only the second pixel array of the column is exposed and recognized. Therefore, each column of the image sensor includes information on ON or OFF.

In this case, it is preferable that the exposure time of each pixel array is synchronized with the data transmission time of the optical signal as shown in the figure so that the optical signal is received in one selected pixel array during a time for transmitting one data.

The optical signals respectively received in the first to Y-th pixel arrays # 1 to #Y are converted into electrical signals, and the converted electrical signals are calculated as respective voltage values through sampling and quantization, Is determined by binary data of 0 or 1 through comparison with the threshold value.

When the determination of the data for the first pixel array to the Y pixel array (# 1 to # Y) is completed, a series of binary data is generated, and the generated binary data is compared with the authentication information by the comparison / do.

In FIG. 2, `P`,` A`, and `C` are pixel, amplifier, and analog digital converters, respectively.

Hereinafter, the operation of the door lock 250 using the visible light communication based LED-ID technology according to the present invention will be described in detail.

First, when the user executes the authentication information request module loaded in the user terminal unit 100, the server 300 also sends the authentication number to the user terminal unit 100 and the opening and closing terminal unit 200.

The user terminal unit 100 converts the received authentication information into a light control signal through the first modulation unit 130. The first control unit 170 controls the first light source unit 140 to operate in accordance with the light control signal. 1 light source unit 140 so that an optical signal is generated from the first light source unit 140. At this time, it is preferable that the user approaches the second image sensor 220 side so that the optical signal generated in the first light source unit 140 can reach the second image sensor 220 side of the opening / closing terminal unit 200.

On the other hand, the opening / closing terminal 200 receives the authentication number transmitted from the server 300 and stores the authentication number received in the memory, and receives the optical signal generated from the first light source 140 through the second image sensor 220, . The optical signal received by the second image sensor 220 is converted into digital information through the first demodulation unit 160. This information is compared with the previously received authentication information by the comparison determination unit 240, And sends the determination information to the second control unit 290. [

The second control unit 290 switches the door lock 250 from the closed state to the open state or keeps it in the closed state in accordance with the judgment information sent out from the comparison and determination unit 240.

Meanwhile, the door lock 250 device using the visible light communication based LED-ID technology according to the present invention can prevent the optical signal generated in the first light source part 140 from being interfered by illumination light or sunlight around the opening / The wavelength of the light generated in the first light source unit 140 can be changed to a hue and transmitted.

The door lock 250 using the LED-ID technology based on the visible light communication according to the present invention can be applied to a variety of applications such as optical camera communication (OCC) and visual light (VLC) Communication of the door lock 250 can be automatically opened and closed.

In addition, the present invention can be applied to a case where a password is leaked by a touch-type method of touching and inputting a preset password on a keypad installed in the digital door lock 250 through OCC (Optical Camera Communication) and VLC (Visual Light Communication) Problems, and the like, and is strong against external light noise, thereby solving security problems such as hacking.

The door lock 250 using the LED-ID technology based on the visible light communication according to the present invention has been described with reference to the accompanying drawings. However, it is to be understood that those skilled in the art will appreciate that various modifications, It will be understood that various modifications and equivalent embodiments are possible. Accordingly, the true scope of protection of the present invention should be determined only by the technical idea of the appended claims.

100:
110: authentication information request unit
120: first authentication information receiver
130: first modulation section
140: a first light source
150: 1st image sensor
160: first demodulation section
170:
200: opening / closing terminal unit
210: second authentication information receiver
220: Second image sensor
230: second demodulator
240: comparative judgment section
250: Door lock
260: additional information generating unit
270: second modulation section
280: second light source
290:
300: server

Claims (4)

An authentication information requesting unit for sending an authentication information request signal for requesting authentication information to a server; a first authentication information receiving unit for receiving authentication information from the server; A first modulator configured to modulate the light modulated by the first modulator, a first modulator configured to modulate the light modulated by the first modulator, a first modulator configured to modulate the light modulated by the first modulator, A first demodulator for demodulating an optical signal to be demodulated by the first demodulator, and a first controller for storing information demodulated by the first demodulator and controlling the first demodulator and the first demodulator;
A second authentication information receiving unit for receiving authentication information from the server when an authentication information request signal is received from the server, a second image sensor for receiving an optical signal generated from the outside, A comparison section for determining whether or not the information demodulated by the second demodulation section and the authentication information received by the second authentication information receiving section are identical to each other; A second modulator for modulating the additional information generated by the additional information generator into a light control signal, a second modulator for modulating the additional information generated by the additional information generator into a light control signal, And a second control unit for controlling the second demodulating unit, the door lock and the second modulating unit, and a second control unit for controlling the second modulating unit, the second modulating unit, The door lock device using a visible-light communication based LED-ID technique, which is characterized in that.
The method according to claim 1,
Wherein the first light source unit and the second light source unit are configured to selectively emit light having different wavelengths by the first control unit and the second control unit, respectively.
3. The method of claim 2,
Wherein the first control unit controls the first light source unit so that light having a wavelength corresponding to a wavelength of light emitted from the second light source unit and received by the first image sensor can be emitted from the first light source unit Door lock system using visible light communication based LED-ID technology.
The method according to claim 1,
Wherein the second control unit controls the image captured by the second image sensor to be stored in the additional information generation unit in real time.

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