KR20040105513A - Door Lock Apparatus by Using Sensing Approach of Smart Card - Google Patents

Abstract

PURPOSE: A door locking apparatus using a card approach detection is provided to elongate a battery usage and to reduce power consumption by supplying power only when a card approach is detected. CONSTITUTION: A door locking apparatus using a card approach detection supplies power to a card reader only when the card approach is detected. The door locking apparatus includes a card reader(118), an infrared emitter(104), a power source(112), a power supply(106), an infrared receiver(108), an operational switch(120), a door lock(114), a motor driver(116), and a controller(110). The power source supplies an operational power. The power supply supplies or blocks the power to the infrared emitter according to a power application control signal. The infrared receiver outputs a detect signal. The operational switch supplies or blocks the power of the power source to the card reader. The door lock locks or releases the door. The controller outputs the power application control signal in a predetermined time interval, outputs an operational signal to the operational switch when the detect signal is received, and outputs the operational signal to the motor driver when authentication information is received from the card reader.

Description

Door Lock Apparatus by Using Sensing Approach of Smart Card

The present invention relates to a door locking device using automatic card access detection, and more particularly, automatically accessing a card to automatically operate the card reader by supplying power to the card reader only when detecting an access of the card using an infrared sensor. A door lock using detection.

With the growing interest in security that protects property and property by preventing unauthorized intrusion of outsiders, access control systems are being widely installed to restrict outsiders' access to homes, apartments, businesses, and government agencies. These access control systems are being manufactured in various forms, ranging from simple low-cost locks to expensive mechanical devices with complex mechanical mechanisms, as well as mechanical and electronic devices that combine electronic technology with mechanical mechanisms.

Mechanical and electronic devices include a keypad input method, a magnetic card method, a radio frequency (RF) card method, an integrated circuit (IC) card method, and the like, and a card type door lock is widely used.

Most card-type door locks are encoded and stored with authentication information for determining whether or not to allow access to the inside of the card. The door lock device is opened and closed by reading authentication information inside the card through a card reader. In this case, when the user approaches the card reader, the user accesses the card to the card reader after performing an operation of pressing the operation button to operate the card reader.

The card reader operates by receiving power from a predetermined battery included in the door lock, and reads authentication information from the card and transmits the authentication information to the control device of the door lock. Subsequently, the control device of the door lock determines the authentication information received from the card reader to perform a lock or unlock operation.

In this case, in order to quickly open and close the door, the door lock device has a disadvantage in that the battery life is shortened by always supplying power from the battery to the card reader.

In addition, the life of the battery largely depends on the normal operation of the card reader. That is, when the card reader is not in a normal state, the battery life may be abnormally shortened due to factors such as battery discharge due to a short circuit. However, the existing door lock device does not provide any information to the user about whether the internal device of the card reader is operating normally. In the case of the existing electronic door lock device, the information provided to the user regarding the operation of the door lock is only enough to inform in advance when to replace the battery.

Therefore, even if a problem occurs in the electronic door lock due to inadvertent or incorrect installation of the product during the operation of installing the electronic door lock or the product itself in the production stage of the electronic door lock, if the door is opened and closed normally, the user will have no doubt about the electronic door lock. I'm using. However, if the electronic door lock continues to be used internally, more power is consumed than in the normal state, causing battery to be quickly consumed or causing more serious defects.

The present invention for solving this problem, by using an infrared sensor to detect the card approach, card access to operate the card reader immediately by supplying power to the card reader that was in the dormant state only when the card approach is detected It is an object of the present invention to provide a door lock using automatic detection.

1 is a block diagram showing the configuration of a door lock using automatic card access detection according to an embodiment of the present invention;

2 is a block diagram schematically showing an internal configuration of an infrared light emitting unit;

3 is a block diagram schematically showing an internal configuration of an infrared light receiving unit;

4 is a view showing waveforms of a power-on control signal and an operation signal;

5 is a flow chart showing the operation of the door locking device according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: door lock 102: card

104: infrared light emitting unit 106: power supply unit

108: infrared light receiving unit 110: control unit

112: power supply 114: door lock

116: motor drive unit 118: card reader

120: operation switching unit 210: frequency generator

220: oscillation unit 230: logic operation unit

240: light emitting sensor portion 250: variable resistance portion

310: light receiving sensor unit 320: band pass filter unit

330: reception signal unit

In order to achieve the object according to the present invention, the present invention, as the door lock device using the automatic card access detection to operate the card reader immediately by supplying power to the card reader that was in the dormant state only when the access of the card is detected. Card reader for reading the authentication information of the person from the card; An infrared light emitting unit generating and emitting an infrared signal; A power supply unit for supplying power for the operation of the door lock device; A power supply unit supplying or blocking power to the infrared light emitting unit according to a power supply control signal; An infrared light receiving unit which receives the infrared reflecting signal reflected from the card and outputs it as a sensing signal; An operation switching unit which supplies or cuts off power to the card reader; A door lock for locking or opening the door; A motor driver for operating the door lock; And when the power supply control signal is transmitted to the power supply unit at predetermined time intervals, and when the detection signal is received from the infrared light receiving unit, an operation signal is sent to the operation switching unit, and the authentication information is received from the card reader. And a controller for applying a driving signal to the motor driver to release the door lock.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram showing the configuration of a door lock using automatic card access detection according to an embodiment of the present invention.

The door locking device 100 according to the present invention includes a card 102, an infrared light emitting unit 104, a power applying unit 106, an infrared light receiving unit 108, a control unit 110, a power supply unit 112, and a door lock 114. , The motor driver 116, the card reader 118, the operation switching unit 120, and the like.

The card 102 is a contactless card, and therein is encoded and stored authentication information for determining whether the user is authenticated. The card reader 118 reads authentication information from the card 102. On the other hand, the card 102 is made of a material that reflects the infrared signal emitted from the infrared light emitting unit 104.

The infrared light emitting unit 104 receives power from the power applying unit 106 to generate an infrared signal, and the power applying unit 106 emits infrared light from the power supply unit 112 according to a control signal from the control unit 110. Supply or cut off to the unit 104, the infrared light receiving unit 108 receives the infrared signal.

The control unit 110 transmits a power application control signal to the power supply unit 106 at a predetermined time interval, for example, 0.6 seconds (Sec), and operates as the operation switching unit 120 when a detection signal is received from the infrared light receiving unit 108. Control the process of applying a signal. In addition, when the authentication information is received from the card reader 118, the driving signal is applied to the motor driver 116 to control the process of releasing the lock of the door lock 114.

The power supply unit 112 supplies power required for the overall operation of the device, and maintains a state of supplying power to the power supply unit 106 and the operation switching unit 120 even when the door locking device 100 is in the dormant state.

The door lock 114 locks or opens the door, and the motor driver 116 operates the door lock 114 according to a driving signal applied from the controller 210.

The card reader 118 operates by receiving power through the operation switching unit 120 to recognize the approach of the card 102, and reads the authentication information of the person from the card 102 and transmits the authentication information to the controller 110.

The operation switching unit 120 supplies or cuts off the power from the power supply unit 112 to the card reader 118 according to an operation signal applied from the control unit 110.

2 is a block diagram schematically illustrating an internal configuration of the infrared light emitting unit 104.

The infrared light emitting unit 104 has a configuration including a carrier generating unit 210, an oscillating unit 220, a logic operation unit 230, a light emitting sensor unit 240, a variable resistor unit 250, and the like.

The carrier generator 210 generates a carrier frequency used for data transmission, and the oscillator 220 generates a reference clock frequency of the infrared signal. In the present invention, 38 kHz is generated as a carrier frequency and 500 kHz is generated as a reference clock frequency, but is not necessarily limited thereto.

The logic operator 230 outputs a logical product of the carrier frequency and the reference clock frequency, and the light emission sensor unit 240 transmits an infrared signal for detecting the approach of the card 102. In the case of the light emitting sensor unit 240, an infrared light emitting diode (not shown) is preferably used for transmitting an infrared signal, and infrared light having a wavelength of 940 nm is generated, but is not necessarily limited to this frequency.

The variable resistor unit 250 adjusts the resistance value by the user, thereby adjusting the current value flowing through the light emitting sensor unit 240 to adjust the intensity of the infrared signal transmitted from the light emitting sensor unit 240. That is, since the infrared signal's arrival distance is proportional to the current flowing through the infrared light emitting diode, the maximum detectable distance can be increased by allowing a large current to flow.

3 is a block diagram schematically illustrating an internal configuration of the infrared light receiving unit 108.

The infrared light receiving unit 108 has a configuration including a light receiving sensor 310, a band pass filter 320, a reception signal unit 330, and the like.

The light receiving sensor 310 is a device for receiving an infrared signal transmitted from the infrared light emitting unit 108, and preferably an amplifier for amplifying an output signal of a photodiode, including a photodiode (not shown) for receiving an infrared signal. (Not shown), and a limiter (not shown) for limiting the amplitude of the signal output from the amplifier to a predetermined level.

The bandpass filter unit 320 filters only signals of a specific frequency band among the signals output from the light receiving sensor unit 310, and the reception signal unit 330 is a signal output from the bandpass filter unit 320. Only signals of a specific frequency band are detected and applied to the control unit 110.

Next, the operation of the door locking device 100 according to the present invention configured as described above will be described.

5 is a flowchart illustrating the operation of the door lock device 100 using the automatic card access detection according to a preferred embodiment of the present invention.

First, power is applied from the power supply unit 112 to the power supply unit 106 and the operation switching unit 120 in the door lock device 100.

However, since the power supply unit 106 and the operation switching unit 120 are in a state in which power is supplied from the power supply unit 112 even in the dormant state, but since the switching state is internally turned off, the power supply unit 106 is removed from the power supply unit 106. Power is not applied to the infrared light emitting unit 104, and the standby state is not applied to the card reader 118 from the operation switching unit 120 (S510).

That is, the power supply unit 106 and the operation switching unit 120 are turned on only when a control signal is applied from the control unit 110, so that power is supplied from the power supply unit 106 to the infrared light emitting unit 104. Then, power is applied from the operation switching unit 120 to the card reader 118. Here, the power supply unit 106 and the operation switching unit 120 may be implemented as a relay, but may be implemented as a semiconductor device capable of switching operation such as a PNP transistor, an NPN transistor, a field effect transistor (FET), or the like. It is preferable.

The control unit 110 transmits a power application control signal as shown in FIG. 4A to the power supply unit 106 to the power supply unit 106 to detect the approach of the card 102 (S520).

The power applying unit 106 that receives the power application control signal from the control unit 110 is switched on to transfer the power from the power supply unit 112 to the infrared light emitting unit 104 and the infrared light receiving unit 108. Accordingly, the infrared light emitting unit 104 and the infrared light receiving unit 108 are operated at the same time by receiving power.

In the infrared light emitting unit 104, the power applied from the power applying unit 106 is transferred to the carrier generating unit 210 and the oscillating unit 220. Accordingly, the carrier generating unit 210 generates a carrier frequency and the oscillating unit 220. ) Generates a reference clock frequency.

The carrier frequency and the reference clock frequency are logically multiplied by the logic calculating unit 230 and applied to the light emitting sensor unit 240. The light emitting sensor unit 240 generates an infrared signal using an infrared light emitting diode according to the operation signal applied from the logic calculating unit 230 and emits it to the air.

The control unit 110 determines whether a predetermined time has elapsed after transmitting the power application control signal to the power applying unit 106. The controller 108 determines whether a detection signal is received from the infrared light receiver 108 after a predetermined time elapses (S530). Here, the predetermined time is a time interval of 0.1 to 1.0 seconds, preferably 0.6 seconds, the infrared signal transmitted once from the infrared light emitting unit 104 is a signal having a plurality of pulses as shown in (a) of FIG.

On the other hand, the user carrying the card 102 is moved to the facility installed door lock device 100 for access to the card 102 to approach the card reader 118.

The infrared signal transmitted from the infrared light emitting unit 104 is received by the infrared light receiving unit 108 by hitting the user or the card 102 and being reflected as the user carrying the card 102 approaches the door lock device 100. . Here, the infrared signal may be transmitted to the infrared light receiver 108 even though the user or the card 102 is not reflected by another object possessed by the user.

In the infrared light receiving unit 108, the internal light receiving sensor unit 310 receives the infrared reflection signal and amplifies it to a predetermined level or limits its amplitude to a predetermined level and transmits it to the band pass filter unit 320. The band pass filter 320 filters the signal output from the infrared light receiver 106 into a frequency signal of a predetermined band and transmits the signal to the reception signal unit 330. The reception signal unit 330 is controlled by the control unit 110. Detects a frequency signal that can be recognized as and applies it to the controller 110 as a detection signal.

When the control unit 110 receives the detection signal as shown in FIG. 4B from the infrared light receiving unit 108 (S530), the control unit 110 applies an operation signal to the operation switching unit 120 (S540).

The operation switching unit 120 receives the operation signal from the control unit 110 and is switched on to transfer the power received from the power supply unit 112 to the card reader 118.

At this time, the card reader 118 is supplied with power from the operation switching unit 120 to operate immediately, it is possible to read the authentication information of the person from the card 102 in the proximity of the card (102). The card reader 218 transmits the information of the person reading from the card 202 to the controller 210.

When the controller 110 receives the person's authentication information from the card reader 118 (S550), the controller 110 applies a driving signal to the motor driver 116 (S560). Accordingly, the motor driver 116 releases the locked state of the door by operating the door lock 114.

As described above, the power of the power supply unit 112 is supplied to the card reader 118 so that the card reader 118 operates only when the card 102 is close, thereby minimizing the consumption of the battery to power the power of the power supply 112. The conventional problem of high consumption can be solved.

In addition, whenever the card 102 is approached to the card reader 118, it is possible to solve the trouble of pressing the operation button provided in the card reader 118.

According to the present invention, an infrared sensor detects the access of a card, and when the access of the card is detected, the door using the automatic card access detection for supplying power to the card reader in the dormant state to operate the card reader immediately. Locking device can be realized.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, by supplying power to the card reader 118 only when the proximity of the card 102 is detected, the battery life can be extended and power consumption can be reduced.

In addition, it is possible to solve the trouble of performing an operation of pressing the operation button of the card reader 118 whenever the card 102 is brought close to the card reader 118.

Claims (7)

A door lock using automatic card access detection, which supplies power to a card reader that was dormant only when a card's access is detected and immediately activates the card reader. A card reader for reading authentication information of a person from the card; An infrared light emitting unit generating and emitting an infrared signal; A power supply unit for supplying power for the operation of the door lock device; A power supply unit supplying or blocking power to the infrared light emitting unit according to a power supply control signal; An infrared light receiving unit which receives the infrared reflecting signal reflected from the card and outputs it as a sensing signal; An operation switching unit which supplies or cuts off power to the card reader; A door lock for locking or opening the door; A motor driver for operating the door lock; And The power supply control signal is transmitted to the power supply unit at predetermined time intervals, and when the detection signal is received from the infrared light receiving unit, an operation signal is sent to the operation switching unit, and the authentication information is received from the card reader. Control unit for applying a drive signal to the motor driving unit to unlock the door lock Door lock using automatic card access detection, characterized in that it comprises a. The method of claim 1, And the control unit transmits the power application control signal to the power applying unit at a time interval of 0.1 second to 1.0 second, preferably 0.6 second. The method of claim 1, wherein the infrared light emitting unit A carrier generator for generating a carrier frequency used for data transmission; An oscillator for generating a reference clock frequency; A logic operation unit for performing an AND operation on the carrier frequency and the reference clock frequency; And Light emitting sensor unit for transmitting the infrared signal for detecting the card approach Door lock using automatic card access detection, characterized in that it comprises a. The method of claim 1, wherein the infrared light receiving unit A light receiving sensor unit for receiving the infrared reflection signal; A band pass filter for filtering only signals of a specific frequency band among the signals output from the light receiving sensor unit; And A reception signal unit for detecting the detection signal from the signal output from the band pass filter unit and applying it to the control unit Door lock using automatic card access detection, characterized in that it comprises a. The method of claim 1, The card is made of a material reflecting the infrared signal, door access device using automatic card access detection, characterized in that the authentication information of the person is coded. The method of claim 3, wherein And a variable resistor unit for adjusting a current value flowing to the light emitting sensor unit according to the adjustment of the resistance value. The method of claim 4, wherein the light receiving sensor unit A photodiode for receiving the infrared signal; An amplifier for amplifying the output signal from the photodiode; And Limiter for limiting the amplitude of the signal output from the amplifier to a certain level Door lock using automatic card access detection, characterized in that it comprises a.