KR100345387B1 - Door Lock/Unlock System Using Fingerprint Recognizing Key and Control Method thereof - Google Patents

Abstract

The present invention provides a high security, ease of use, sensor by double checking by the mechanical matching of the fingerprint recognition key and the authentication of the recognized fingerprint using the fingerprint recognition key with a fingerprint recognition sensor built-in The present invention relates to a door lock / unlock system and a control method thereof capable of preventing breakage and improving applicability by miniaturization.

The present invention has a fingerprint recognition key is embedded in the key handle, the fingerprint recognition key formed with a key body having a specific external shape at the tip of the key handle, and has an internal shape that matches the external shape of the key body, the door is locked If the locking device to be set, the locking latch to set the locking state by blocking the operation of the locking device, and the inquiry fingerprint recognized by the fingerprint recognition sensor match one of the registered fingerprints, a lock release signal of the locking latch is generated. The fingerprint authentication unit, an actuator for driving the locking latch to release the locking state according to the unlocking signal, and the fingerprint recognition sensor and the fingerprint authentication unit mechanically and electrically when the key body is mechanically matched with the locking device. It is characterized by consisting of a connecting means for connecting.

Description

Door Lock / Unlock System Using Fingerprint Recognizing Key and Control Method

The present invention relates to a door lock / unlock system using a fingerprint recognition key and a control method thereof. In particular, the door locking state of a door using a fingerprint recognition key in which a fingerprint recognition sensor is embedded is determined by the mechanical consistency of the fingerprint recognition key and the fingerprint recognized. Door lock / unlock system using fingerprint recognition key to improve security, convenience of use, prevention of sensor breakdown, and applicability by miniaturization by double confirmation by certification will be.

Recently, fingerprinting has been applied to many fields since modern fingerprinting was established by Edward R. Henry. In particular, fingerprints are widely used in the fields of salary, personnel, finance, criminal investigation and security as a powerful personal authentication means.

The personal authentication process using fingerprints consists of a process of classifying different types of fingerprints and a matching process to verify the identity of the user. One or more identification systems for distinguishing the input fingerprints and a verification system for discriminating and comparing the registered fingerprints and the input fingerprints in a one-to-one manner are distinguished.

On the other hand, the fingerprint has a plurality of feature regions in addition to the normal region consisting of a fingerprint ridge with a precise direction. In this feature, the ridge progresses and breaks, which is referred to as an ending point, and the ridge splits are referred to as a bifurcation, collectively referred to as a fingerprint feature (Minutiae).

Generally, about 100-150 feature points are distributed on one finger, and each person has different kinds, positions, and directions. Therefore, the position and direction of these feature points can be used as a means of discriminating each fingerprint. Generally, if the feature points match 50-60% or more, the same fingerprint is judged. It is also possible to process.

In order to recognize the fingerprint, a preprocessing process for extracting a feature point of the fingerprint is generally performed, a direction pattern and a feature point extraction process used for matching and discrimination, and an identification and authentication process using the same.

On the other hand, in the latter authentication system such as a door locking / unlocking device and a computer security device of a vehicle or a building, the number of registered fingerprints may be small and the reliability level may be low, so the number of feature points extracted in the feature extraction process may be set smaller. And it is possible to set the threshold value small in the authentication process using this.

Such an authentication system needs to satisfy several requirements to make a module easy and inexpensive and to be applicable in various cases.

First of all, in case of being mainly used independently such as various personal portable devices, vehicles, personal safes, doors of apartments or office buildings, fingerprint recognition algorithms that can be independently recognized and identified without being connected to a server or a control PC are always available. It is essential to be driven by a stand-alone type mounted on the module itself.

In addition, for the easy installation of the module, the smaller the size is as good as possible, and to be used for portable power supply by the battery must be possible, for this purpose, the system should be designed with low power supply and low power consumption. Moreover, since it is used only by individuals or by a specific number of people, it is desirable that the fingerprint recognition / authentication algorithm and system have a low installation cost even though the performance is somewhat degraded.

However, the conventional fingerprint recognition system has a problem in that the size of the module is large and the price is expensive, so that it is difficult to apply to various applications requiring miniaturization.

In consideration of this point, the present applicant uses a semiconductor fingerprint sensor in patent application No. 98-49106 (Nov. 16, 1998) to reduce the size of the module and to embed the fingerprint recognition algorithm into the battery. It has been proposed a fingerprint recognition system and a control method thereof that can be used as a stand-alone type by designing the system for low power consumption in order to enable driving.

However, the lock / unlock system of the door using the fingerprint recognition system has a type in which a semiconductor fingerprint recognition sensor is integrally provided in the module, and the fingerprint recognition module is limited in application to various products because of its large size and thickness. This will follow.

In addition, in order to know whether a fingerprint touches the sensor, a circuit and a structure such as a separate sensor or a switch are required for the fingerprint sensor structure.

Furthermore, in the related art, the fingerprint sensor is exposed to the outside, and in the case of a vehicle, the optical fingerprint sensor may be damaged by an evil user, as well as a semiconductor type, and may be damaged by an external environment such as rain, snow, or dust. There is a risk of failure.

In addition, in the conventional fingerprint recognition system, when applying it to the door lock / unlock system, an outsider (particularly, a power switch for starting the system and a plurality of keypads for performing fingerprint registration and deletion input must be installed). Failure to operate the keypad roughly or deliberately by a bad guy may cause a malfunction.

Therefore, the present invention has been made in view of the problems of the prior art, the object of which is to use the fingerprint recognition key with a built-in fingerprint sensor, the locked state of the door to the mechanical integrity of the fingerprint recognition key and the authentication of the recognized fingerprint. Door lock / unlock system using fingerprint recognition key which can improve the high security, convenience of use that does not require separate switch operation, prevention of sensor damage, and improvement of application by miniaturization by double check To provide a control method.

Another object of the present invention is to provide a door lock / unlock system and a method of controlling the same, which can prevent theft and key theft.

1 is a schematic block diagram showing a door lock / unlock system using a fingerprint recognition key according to an embodiment of the present invention;

2 is a detailed block diagram of the system shown in FIG. 1;

3A and 3B are flowcharts illustrating a door lock / unlock control method using a fingerprint recognition key according to the present invention.

* Explanation of Signs of Major Parts of Drawings *

One ; Fingerprint identification key 10; door

100; Fingerprint sensor 101; Fingerprint input pad

110; Key handle 111; System control unit

120; A clock generator 121; Charge pump control circuit

122; Data output buffer 130; Pointer

131; Counter 140; Precharge Circuit

141; Sensor array 142; A / D Converter

143; Line register 144; Shift register

200; Key body 300; Sensor connection

400; Lock 410; Locking clasp

420; Actuator 430; relay

500; Key connection 600; Fingerprint Authentication Department

610; CPU 620; First memory

621; System program area 622; Fingerprint data area

630; Second memory (RAM) 640; I / O Control

700; Power supply 800; Certification Notification / Alarm

In order to achieve the above object, the present invention is embedded so that the fingerprint input pad of the fingerprint sensor for recognizing the user's fingerprint is exposed to one side of the key handle, the key body having a specific external shape at the tip of the key handle A lock device for extending the fingerprint recognition key, the key insertion opening to be exposed to the outside of the door, and having an inner shape matching the external shape of the key body of the fingerprint recognition key, and setting the door to a locked state; It is installed inside to lock the lock to set the locking state by blocking the operation of the lock device, and installed by judging whether the inquiry fingerprint installed in the door recognized by the fingerprint sensor matches one of the registered fingerprints A fingerprint authentication unit for generating a unlocking signal for releasing the locking state of the locking clasp when the fingerprint is one of the fingerprints; Actuator for driving the locking clasp to release the locking state of the locking device and fingerprint recognition sensor when the external shape of the key body is mechanically matched with the internal shape of the locking device when the fingerprint recognition key is inserted into the locking device. It is composed of connecting means for mechanically and electrically connecting the user's fingerprint data recognized from the user to the fingerprint authentication unit, so that the mechanical matching between the external shape of the key body and the internal shape of the locking device is authenticated. In this case, it provides a door lock / unlock system using a fingerprint key, characterized in that the lock state of the door can be released.

In the system, when the key body of the fingerprint recognition key is mechanically matched to the locking device, the fingerprint recognition sensor is activated by power through a connecting means, and the fingerprint recognition sensor is composed of a plurality of pixels to contact the user's fingerprint. According to the difference in the contact resistance value corresponding to the projection pattern and the valley pattern of the fingerprint for each pixel, the discharge amount of charge previously charged in each pixel is changed to generate a current value proportional to the remaining charge amount as 8-bit digital fingerprint data.

In addition, the connecting means is connected to the data bus and the control line extending from the fingerprint recognition sensor to the key body inserted into the locking device through the inside of the fingerprint recognition key, and the front end of the data bus and the control line, respectively, Key connection part consisting of a plurality of contacts exposed at regular intervals along the tip portion, and a sensor connection portion consisting of a plurality of contacts connected to the data bus and the control line of the fingerprint authentication unit and having the same contact pattern as the contact pattern of the key connection portion. Can be.

Furthermore, the present invention further includes an inquiry result guiding means for the control means to inform the fingerprint inquiry result in any one of a visual and auditory manner in response to the fingerprint inquiry of the user at the same time of unlocking.

According to another feature of the invention, the present invention comprises the steps of inserting a fingerprint recognition key with a fingerprint recognition sensor for recognizing a user's fingerprint in the key insertion opening of the locking device, the external shape of the key body of the fingerprint recognition key is locked Judging whether the internal shape of the device matches the internal shape of the device, and if the external shape of the key body matches the internal shape of the locking device, the power supply and the fingerprint recognition request signal are sent to the fingerprint sensor through a connection means embedded in the key body. Transmitting, and generating, as a digital raw signal, a residual current value corresponding to a projection pattern and a bone pattern of a user fingerprint for each pixel of the fingerprint recognition sensor according to the fingerprint recognition request, and transmitting the generated digital signal to the fingerprint authentication unit; The raw signal obtained from all the pixels of the recognition sensor is temporarily stored in the memory, and the extracted feature points of the fingerprint are extracted from the raw signal. Performing fingerprint authentication by comparing the data with the pre-registered fingerprint data, and generating a unlocking signal for releasing the locking state of the lock latch to the actuator when the authentication result inquiry fingerprint matches one of the registered fingerprints; And releasing the locked state of the door by rotating the fingerprint recognition key.

As described above, in the present invention, using the fingerprint recognition key with a fingerprint recognition sensor, the locked state of the door is high security and convenience of use by double checking by mechanical matching of the fingerprint recognition key and authentication of the recognized fingerprint. We can plan sex.

Moreover, since the fingerprint sensor is separated from the fingerprint module and embedded in the key, it is possible to reduce the size of the module, prevent damage to the sensor, and improve the applicability by miniaturization, and at the same time, the module itself has a built-in fingerprint recognition algorithm. The battery can also be driven.

(Example)

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a schematic block diagram showing a door lock / unlock system using a fingerprint recognition key according to an embodiment of the present invention, FIG. 2 is a detailed block diagram of the system shown in FIG. A flowchart illustrating a door lock / unlock control method using a fingerprint recognition key according to the present invention.

First, referring to FIGS. 1 and 2, the door lock / unlock system using the fingerprint recognition key according to the present invention has a fingerprint recognition key 1 in which a fingerprint recognition sensor 100 is embedded, and a fingerprint recognition key 1 when the fingerprint recognition key 1 is inserted. Fingerprint for determining whether to unlock the lock latch 410 by authenticating the lock device 400 for determining the mechanical integrity of the fingerprint recognition key (1) and the fingerprint recognized by the fingerprint recognition sensor 100 in the The authentication unit 600 is configured.

The fingerprint recognition key 1 is embedded so that the fingerprint input pad 101 of the fingerprint recognition sensor 100 is exposed to one side of the key handle 110, and at the tip of the key handle 110 of the lock device 400. The key body 200 is extended with a specific external shape that matches a specific internal shape.

The shape of the key body 200 of the fingerprint recognition key 1 and the locking device 400 installed in the door 10 may be any shape, any structure in general, only the locking device 400 is The release of the locking state of the locking latch 410 with respect to the locking device 400 by the operation of the actuator can be used if the structure can be controlled.

The key body 200 is embedded with an 8-bit data bus connected to the fingerprint sensor 100, a 3-bit control line, and two power lines. The other end of the data bus, the control line, and the power line are connected to a key connection part 500 formed of 13 contacts arranged in a line (or parallel) on the key body 200, and arranged inside the locking device 400. The sensor connection part 300 of the fingerprint authentication unit 600 is provided with 13 contacts corresponding to the 13 contacts of the key connection part 500.

Therefore, when the user grasps the key handle 110 and inserts the key body 200 into the locking device 400, if the external shape of the key body 200 matches the internal shape of the locking device 400, the key connection part ( The 13 contacts of the 500 may be in contact with the 13 contacts of the sensor connection unit 300 to transmit data between the fingerprint recognition sensor 100 and the fingerprint authentication unit 600.

However, when the external shape of the key body 200 and the internal shape of the locking device 400 do not coincide, the 13 contacts of the key connection part 500 are not in contact with each contact of the sensor connection part 300. Therefore, the data transmission between the fingerprint recognition sensor 100 and the fingerprint authentication unit 600 is not made.

The fingerprint input pad 101 is set to, for example, the surface of the semiconductor sensor array 141 made up of 224 (column) x 288 (pixel) pixels, and detected one pixel from the fingerprint recognition sensor 100. A total of 224 × 288 bytes of fingerprint data is made up of 8 bits each time a fingerprint of 1 pixel is detected, and thus the key connection part 500 of the key body 200 is provided through an 8-bit data bus inside the key body 200. It is transmitted to the sensor connection unit 300 of the fingerprint authentication unit 600 through).

The fingerprint sensor 100 is composed of 224 (column) x 288 (pixel) pixels for recognizing a fingerprint, and each pixel when the user touches a fingerprint having a unique shape consisting of a plurality of protrusion patterns and a valley pattern. The protrusion pattern portion includes a semiconductor sensor array 141 which generates a residual current value as an analog output signal by changing the charge value at which the charged charge is discharged according to the difference in the contact resistance value, and the CPU of the fingerprint authentication unit 600 described later. The system controller detects a user's fingerprint from the sensor array 141 according to the control signals RESET and REQUEST of 610 and generates various control signals C1-C4 to transmit 8-bit fingerprint data for each pixel. 111, a charge pump control circuit 121 and a charge pump control circuit 121 which sequentially generate a plurality of control signals B1-B6 in response to the control signal C2 of the system control unit 111. In response to the control signal B2 of The precharge circuit 140 for precharging the sensor array 141 and the clock generator 120 generating a periodic clock signal CLK in response to the control signal B3 of the charge pump control circuit 121. And, in response to the control signal (C1) of the system control unit 111 to designate each column of the sensor array 141 according to the clock signal (CLK) to specify that the residual current value of each cell of the corresponding column in sequence In response to the control signal B4 of the charge pump control circuit 121 and the charge pump control circuit 121, the remaining current value is read out for each pixel of each column of the sensor array 141 according to the designation of the pointer 130, and this value is 256 gray. Analog / digital (A / D) converter 142 for converting gray level, i.e., 8-bit digital fingerprint data, control signal C3 and charge pump control circuit 121 of system controller 111; A line level for storing 8-bit fingerprint data of the A / D converter 142 according to the control signal B5 of the A shift register 144 for shifting the fingerprint data stored in the line register 143 by one bit according to the control signal C4 of the system controller 111, a charge pump control circuit ( A counter 131 for counting the shift of the fingerprint data stored in the line register 143 by one bit by the shift register 144 according to the control signal B6 of 121 and the counter 131 The data output buffer (D0) 122 is configured to edit the fingerprint data into 8 bits according to the counting and transmit the fingerprint data to the fingerprint authentication unit 600 through the data bus.

The fingerprint sensor may use a model number FTF 1100 of Siemens.

On the other hand, the fingerprint authentication unit 600 of the present system extracts the feature points of the fingerprint by signal processing the raw signal obtained from the semiconductor fingerprint recognition sensor 100, and performs the control and operation processing of the entire system such as authentication of the inquiry fingerprint. A microprocessor (CPU) 610 was employed for this purpose. As the CPU 610, it is preferable to employ a high speed, low power consumption RISC chip of 32 bits or more.

The CPU 610 also temporarily stores a first memory 620 comprising a system program area 621 in which a system control program is stored, a fingerprint data area 622 in which registered fingerprint data is stored, and data being processed. The second memory 630 is connected to each other via a data bus and an address bus.

The first memory 620 may register and delete fingerprint data at any time. When the system is not driven, a flash memory FMEM may be used so that the stored data may be preserved even if the power consumption is cut off. 630 preferably uses a RAM.

In addition, the fingerprint authentication unit 600 has an input / output control unit (I / O CONTROL) 640 for managing input / output data connected to an internal data bus and an address bus. Of the 13 contacts of the sensor connection unit 300 of the fingerprint authentication unit 600 which is in contact with the key connection unit 500 of the key body 200, 8 contacts connected to the external data bus (DATA BUS), and the control line (CONT) The three contacts connected to the line are connected to the input / output control unit 640, and the two power lines are connected to a power supply unit (PWR) 700 for applying operating power to the system by, for example, a battery.

The input / output control unit 640 includes an authentication notification / alarm device 800 including two color LEDs for notifying the authentication result of the inquired fingerprint data and an alarm operation alarm device, and a fingerprint registered as a result of the authentication. In response, the actuator 420 which operates the relay 430 to release the locking state of the latch 410 with respect to the locking device 400 under the control of the CPU 610 is connected.

In addition, the input / output control unit of the CPU 60 may be provided with an input interface including a keypad required for processing fingerprint registration and deletion of the first memory 620 in the case of home use, and a plurality of individual systems of a predetermined size or more interwork with each other. In case it is managed by one central control center, it does not need to be provided separately in individual systems.

Hereinafter, the operation of the door lock / unlock system using the semiconductor fingerprint recognition sensor according to the preferred embodiment of the present invention will be described with reference to FIGS. 3A and 3B.

First, the user locks the key body 200 to the door 10 in a state in which the user contacts a finger whose fingerprint is registered with the fingerprint input pad 101 of the key handle 110 of the fingerprint recognition key 1. ) Is inserted into the inside (S1).

Then, when the external shape of the key body 200 coincides with the internal shape of the locking device 400 according to the insertion of the key body 200, the thirteen contacts of the key connection part 500 are the thirteen contact points of the sensor connection part 300. In connection with the contact, the fingerprint recognition sensor 100, the fingerprint authentication unit 600 and the power supply 700 is electrically connected (S2, S3). In this case, the upper / lower pins inside the locking device 400 are aligned in a straight line so that the inner cylinder (not shown) is set in a rotatable state.

On the contrary, when the external shape of the key body 200 and the internal shape of the locking device 400 do not coincide with each other, 13 contacts of the key connection part 500 are not connected to each contact point of the sensor connection part 300. The fingerprint recognition sensor 100, the fingerprint authentication unit 600, and the power supply 700 are not connected to the circuit, so the fingerprint recognition sensor 100 does not reach an operation state, and as a result, the actuator (from the fingerprint authentication unit 600) Since the lock release signal SLL for 420 is not issued, the locking latch 410 remains locked and the cylinder of the locking device 400 is not rotated (S4).

When the fingerprint recognition sensor 100, the fingerprint authentication unit 600, and the power supply 700 are electrically connected in step S3, first, the power line PWR LINE from the power supply device 700 to the fingerprint recognition sensor 100. Power is applied through the fingerprint recognition sensor 100 is activated (S5).

Subsequently, the CPU 610 of the fingerprint authentication unit 600 transmits the reset signal RESET of the low level L to the fingerprint recognition sensor 100 through the control line CONT LINE, thereby transmitting the system control unit 111. In response to the control signals C3 and C4, the fingerprint recognition sensor 100 is initialized, that is, the values of the line register 143 and the shift register 144 are cleared (S6).

The CPU 610 transmits the low level L request signal REQUEST to the fingerprint recognition sensor 100 through the control line CONT LINE, thereby causing the system controller 111 to generate a pointer of the fingerprint recognition sensor 100. The control signals C1 and C2 are applied to the 130 and the charge pump control circuit 121 to prepare for fingerprint recognition.

Accordingly, the charge pump control circuit 121 operates the clock generator 120 to apply the clock signal CLK to the pointer 130 and at the same time the precharge circuit 140 to operate the sensor array 140. Charge each pixel with charge.

When the preparation for the fingerprint recognition is completed, the system controller 111 of the fingerprint recognition sensor 600 transmits the read completion signal READY of the high level H through the control line CONT LINE to the CPU of the fingerprint authentication unit 600. To 610.

The CPU 610 determines whether the readiness completion signal READY has arrived (S8), and if so, the key connection unit 500 and the sensor connection unit 300 are inputted to the fingerprint data recognized by the fingerprint recognition sensor 100. Read through (S9).

That is, since the user's fingerprint is already in contact with the fingerprint input pad 101, when the pointer 131 sequentially assigns each column of the sensor array 141, the charges charged in the projection pattern portion of the fingerprint in each pixel of the corresponding column According to the difference in the contact resistance value, part is discharged and the remaining current value is output to the A / D converter 142 according to the remaining charge value, converted into 8-bit digital fingerprint data, and then stored in the line register 143. .

The stored fingerprint data is shifted by one bit by the shift register 144, edited into eight bits in the data output buffer 122, and transmitted to the fingerprint authentication unit 600 through the data bus.

The CPU 610 stores the fingerprint data read for all the pixels of the sensor array 141 in the second memory (RAM) 630 in the same manner, and then determines whether the fingerprint image of the detected fingerprint data is good (S10). ).

As a result of the determination, if the fingerprint image is not good (contact failure, etc.), the process returns to the above step S6 to perform the fingerprint recognition again. If the fingerprint image is good, the CPU 161 reads the entire 64512 bytes of the fingerprint. The feature points of the fingerprint are extracted from the data with an appropriate number, and the extracted feature point data is temporarily stored (S11).

Thereafter, the CPU 610 determines whether the same fingerprint is present among the fingerprint data registered in the fingerprint data area 622 of the first memory 620 with the feature point data of the inquired fingerprint. At this time, the authentication method of the fingerprint used may be selected from well-known methods in consideration of the number of users, and the criterion for determining whether the fingerprint is the same is based on a threshold set in advance according to the security level of the system at the request of the user. Is determined.

When the matching fingerprint is found as a result of the comparison, the CPU 610 operates the actuator 420 through the input / output control unit 640 to excite the relay 430 to lock the locking device 400. Release the locking latch 410 to be set to allow the locking device 400 to be rotated (S13).

The green LED of the authentication notification / alarm device 800 including the two-color LED and the alarm operation alarm device lights up and simultaneously operates the alarm device to inform that the inquiry fingerprint is authenticated (S14). Thereafter, when the user rotates the key knob 110, the locking pin 400 for the door 10 coupled to the rear end of the cylinder is released by rotating the cylinder (not shown) and the key body 200 of the locking device 400. (10) is opened (S15).

However, when the matching registration fingerprint is not found as a result of the determination of step S12, the CPU 610 keeps the actuator 420 in an inactive state, so that the relay 430 is also in the off state. As a result, the locked state of the locking latch 410 is not released (S16).

In addition, the CPU 610 outputs a mismatch signal to the authentication notification / alarm device 800 to turn on a red LED and simultaneously operate the alarm device three times to inform that the inquiry fingerprint is not authenticated (S17). In this case, since the locking state of the locking latch 410 is not released even if the user turns the key handle 110, the key body 200 is not rotated so that the door 10 is not opened (S18).

The system of the present invention described above is a mechanical method for the key body 200 of the fingerprint recognition key only by inserting the fingerprint recognition key 1 into the locking device 400 of the door 10 as shown in FIG. The integrity is checked, and then the user's fingerprint is automatically recognized and authentication is performed by matching with the fingerprint registered in the fingerprint authentication unit 600 installed inside the door. Thus, the user can enter a general key without any additional switch operation. Double security is achieved while using it as conveniently as opening a door.

As a result, the system of the present invention does not allow fingerprint authentication to be performed even if the key is lost. Therefore, it is impossible for a malicious third party to invade the system using the same. Especially, in the case of a key of a safe for storing important confidential documents or valuables, the key is lost. The risk of theft is eliminated.

In addition, the fingerprint recognition key 1 of the present invention cannot be used when the user is not a true user even by copying the key shape, and the failure and malfunction of the fingerprint recognition sensor by a third party, rain, snow, etc. Can be prevented.

As described above, in the present invention, using the fingerprint recognition key with a built-in fingerprint sensor, the locking state of the door is high security and convenience of use by double checking by the mechanical matching of the fingerprint recognition key and authentication of the recognized fingerprint. We can plan sex.

Moreover, since the fingerprint sensor is separated from the fingerprint module and embedded in the key, it is possible to reduce the size of the module, prevent damage to the sensor, and improve the applicability by miniaturization, and at the same time, the module itself has a built-in fingerprint recognition algorithm. The battery can also be driven.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the spirit of the present invention.

Claims (6)

A fingerprint recognition key embedded with a fingerprint input pad of a semiconductor fingerprint recognition sensor for recognizing a user's fingerprint and exposed to one side of the key handle, and having a key body having a specific external shape at the tip of the key handle; The key insertion opening is installed to be exposed to the outside of the door and has an internal shape that matches the external shape of the key body of the fingerprint recognition key, and a locking device for setting the door to a locked state, A locking clasp installed inside the door to set a locked state by blocking an operation of the locking device; It is installed inside the door and determines whether the inquiry fingerprint recognized by the fingerprint sensor matches one of the registered fingerprints and generates a unlocking signal for releasing the locking state of the locking latch when the fingerprint is one of the registered fingerprints. Fingerprint authentication unit, An actuator for driving the locking latch to release the locking state of the locking device according to the locking release signal; If the external shape of the key body is mechanically matched with the internal shape of the locking device when the fingerprint recognition key is inserted into the lock device, the power source and the fingerprint recognition request signal are transmitted from the fingerprint authentication unit and the user recognized from the fingerprint recognition sensor. It consists of a connection means for mechanically and electrically connecting the fingerprint data of the fingerprint authentication unit, The connecting means includes a data bus and a control line extending from the fingerprint recognition sensor to a key body inserted into the locking device through the inside of the fingerprint recognition key; A key connection portion which is connected to the front end of the data bus and the control line, respectively, and comprises a plurality of first contacts exposed at regular intervals along the tip of the key body; The sensor is connected to the data bus and the control line of the fingerprint authentication unit and comprises a plurality of second contacts having the same contact pattern as the contact pattern of the key connection unit, The fingerprint authentication unit locks the locking latch of the locking device by operating the actuator when the user fingerprint recognized from the fingerprint recognition sensor is authenticated through the mechanical matching between the external shape of the key body and the internal shape of the locking device. A door lock / unlock system using a fingerprint key, characterized in that to unlock the door by setting to the unlocked state. According to claim 1, wherein the fingerprint sensor is activated by applying power through the connecting means when the key body of the fingerprint recognition key is mechanically matched to the locking device, It consists of a large number of pixels, and when the user's fingerprint is touched, the discharge amount of charge previously charged in each pixel changes according to the difference in the contact resistance value corresponding to the protrusion pattern and the valley pattern of the fingerprint for each pixel. A door lock / unlock system using a fingerprint recognition key, characterized in that the current value is generated as 8-bit digital fingerprint data. delete According to claim 1, wherein the fingerprint authentication unit First memory means for storing a system control program for extracting feature points from the fingerprint data obtained from all the pixels of the semiconductor fingerprint recognition sensor, registering the extracted feature points data of the extracted fingerprint, managing a registered fingerprint, and controlling the entire system; Second memory means for temporarily storing data in signal processing including the fingerprint data; When the user inserts the fingerprint recognition key into the lock, and the external shape of the key body is mechanically matched with the lock, the fingerprint detection sensor is requested to the fingerprint recognition sensor through the connection means according to the system control program. According to the feature point extraction program, the feature point of the fingerprint is extracted from the user's fingerprint data recognized by the fingerprint recognition sensor. And a control means for generating a unlocking signal for releasing the locking state of the locking latch to the actuator if it matches. delete Judging whether the external shape of the key body of the fingerprint recognition key coincides with the internal shape of the locking device when inserting the fingerprint recognition key with the fingerprint recognition sensor for recognizing the user's fingerprint into the key insertion opening of the door lock device; , If the external shape of the key body matches the internal shape of the locking device, sending a power supply and a fingerprint recognition request signal from the inside of the door to the fingerprint sensor through the data bus and control line of the connection means embedded in the key body; , Generating a residual current value corresponding to the projection pattern and the valley pattern of the user fingerprint for each pixel of the fingerprint recognition sensor as a digital raw signal according to the fingerprint recognition request, and transmitting the digital current signal to the fingerprint authentication unit inside the door through the connection means; , The fingerprint authentication unit temporarily stores the raw signals obtained from all the pixels of the fingerprint recognition sensor in a memory, extracts the feature points of the fingerprints from the source signals, and compares the user fingerprint data composed of the extracted feature point data with the previously registered fingerprint data. Performing authentication, When the authentication result inquiry fingerprint matches one of the registered fingerprints, a lock release signal for releasing the locking state of the locking latch from the fingerprint authentication unit to the actuator to release the lock state of the door by rotating the fingerprint recognition key. Door lock / unlock control method using a fingerprint recognition key, characterized in that consisting of the step of generating.