CN208954159U - Smart lock - Google Patents

Abstract

The utility model discloses a kind of methods that smart lock and control smart lock are opened.The smart lock includes: image capture module, is connect with processor, for acquiring the images to be recognized of shelter；Infrared supplementary lighting module, connect with processor, for emitting infrared light when acquiring images to be recognized；Processor receives the images to be recognized to generate control signal of unlocking, the unlocking control signal identifies the face in the images to be recognized based on processor, and In vivo detection is carried out to the shelter, when being detected as living body, the face characteristic in the images to be recognized is extracted, generation when being matched with pre-stored face characteristic；Clutch control module is connected to the processor, and control driving mechanical lock is unlocked；Power supply, for powering to image capture module, infrared supplementary lighting module, processor and clutch control module.The utility model improves safety and the discrimination of smart lock by recognition of face and In vivo detection.

Description

Smart lock

Technical field

The utility model embodiment is related to intelligent lock technology more particularly to a kind of smart lock.

Background technique

With the promotion and popularization of intelligent Community and smart home in recent years, this change with rapid changepl. never-ending changes and improvements also occurs for smart lock Change, smart lock, which refers to, is different from tradition machinery lock, in user's identification, safety, the more intelligentized lockset of managerial aspect.Intelligence Can lock is the execution unit locked a door in access control system.

Currently, Fingerprint Lock with its safety and convenience occupies mass market in smart lock market, advantage includes: peace Quan Xing, since fingerprint has uniqueness, there are two duplicate fingerprints in the whole world；Convenience, it is not necessary to carrying keys, one The fingerprint of people is unchangeable, the worry of the very convenient preparation key for eliminating common lock of fingerprint management；Scalability can accommodate Multiple fingerprints, and fingerprint can be registered at any time, manage fingerprint；Discrimination is high.

Although Fingerprint Lock has the above advantages, Fingerprint Lock remains following disadvantage: fingerprint is easy to be replicated, And fingerprint head scan area is big, is more easily damaged, and leads to improper unlocking, threatens to exist to safety；Finger is drawn Broken, phenomena such as peeling, can cause identify.

Utility model content

In view of this, the utility model embodiment provides a kind of smart lock, to improve safety and the discrimination of smart lock.

The utility model embodiment provides a kind of smart lock, the smart lock include: processor, image capture module, Infrared supplementary lighting module, clutch control module, mechanical lock and power supply；

Described image acquisition module is connected to the processor, and for acquiring the images to be recognized of shelter, and is sent to The processor；

The infrared supplementary lighting module is connected to the processor, for emitting infrared light when acquiring images to be recognized；

The processor receives the images to be recognized to generate control signal of unlocking, and the unlocking control signal is based on place Reason device identify the face in the images to be recognized, and in the images to be recognized include face when to the shelter carry out In vivo detection extracts the face characteristic in the images to be recognized when being detected as living body, with pre-stored face characteristic into It is generated when row matching；

The clutch control module is connected to the processor, for receiving the unlocking signal, according to the unlocking Signal is controlled, control driving mechanical lock is unlocked；

The power supply respectively with described image acquisition module, infrared supplementary lighting module, processor and the clutch control mould The feeder ear of block connects, for described image acquisition module, infrared supplementary lighting module, processor and the clutch control module Power supply.

The technical solution of the utility model embodiment acquires images to be recognized, infrared light filling mould by image capture module Block sends infrared light when acquiring images to be recognized, and processor identifies the face in images to be recognized, and in images to be recognized packet In vivo detection is carried out when including face, when being detected as living body, the face characteristic in images to be recognized is extracted, with pre-stored people Face feature is matched, and control signal of unlocking is sent when successful match to clutch control module, clutch control module control It drives mechanical lock to unlock, to improve safety and the discrimination of smart lock by recognition of face and In vivo detection, avoids By photo identification unlocking is carried out, and the identification under dark situations may be implemented by infrared supplementary lighting module.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram for smart lock that the utility model embodiment one provides；

Fig. 2 is the structural schematic diagram of the power supply in smart lock provided by the embodiment of the utility model；

Fig. 3 is the flow chart for the method that a kind of control smart lock that the utility model embodiment two provides is opened.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than full content.

Embodiment one

Fig. 1 is a kind of structural schematic diagram for smart lock that the utility model embodiment one provides, intelligence described in the present embodiment Can lock be to be controlled by recognition of face, as shown in Figure 1, smart lock described in the present embodiment includes: that processor 10, image are adopted Collect module 20, infrared supplementary lighting module 30, clutch control module 40, mechanical lock 50 and power supply 60.

Wherein, image capture module 20 is connect with processor 10, for acquiring the images to be recognized of shelter, and is sent to Processor 10；

Infrared supplementary lighting module 30 is connect with processor 10, for emitting infrared light when acquiring images to be recognized；

Processor 10 is connect with clutch control module 40, for identification the face in the images to be recognized, and in institute In vivo detection is carried out to the shelter when stating in images to be recognized including face, when being detected as living body, is extracted described wait know Face characteristic in other image, is matched with pre-stored face characteristic, and control letter of unlocking is sent in successful match Number give clutch control module 40；

Clutch control module 40 is used to control signal according to the unlocking, and control driving mechanical lock 50 is unlocked；

Power supply 60 respectively with image capture module 20, infrared supplementary lighting module 30, processor 10 and clutch control module 40 Feeder ear connection, for image capture module 20, infrared supplementary lighting module 30, processor 10 and clutch control module 40 Power supply.

Wherein, the connection of processor 10 and image capture module 20, infrared supplementary lighting module 30, clutch control module 40 It is to be connected by bus, processing 10 is located on core board, and core board draws each interface of processor, and core board, image are adopted Collection module 20, infrared supplementary lighting module 30, clutch control module 40 are located on preceding mainboard, are connected by the interface on preceding mainboard. Power supply is located on rear mainboard, is connect by reserved interface with the modules on preceding mainboard.It afterwards further include that channel is opened on mainboard Pass and electronic lock switch, progress recognition of face is not had to when channel switch is opened to be unlocked, and user is pre- when electronic lock switch is opened The user in grouping being first arranged can be unlocked by recognition of face, and the user of other groupings cannot be opened by recognition of face Lock.It includes waking up key that the smart lock is also optional, carries out recognition of face and unlocking for waking up smart lock.Wherein, processor 10 can be worked steadily in the long term using high-performance, the dsp processor of low-power consumption.Smart lock supports auto sleep mode, Environmental protection and energy saving.

Infrared supplementary lighting module 30 is by the controlled lamp group in 2 tunnels at wherein controlled lamp has 2*10 all the way, the controlled lamp of another way has 1* 7, totally 27 controlled lamps.

It can use dynamic local Signature Analysis Techique (Dynamic Local Feature when extracting face characteristic Analysis, DLFA) identify face characteristic.Dynamic local Signature Analysis Techique, first to the images to be recognized including face It is pre-processed, in order to noise excessively high in images to be recognized is removed, by the images to be recognized peripheral adjustment of input The method migration of detection is at two-symbol image, then extracts face texture, is then come using Local Features Analysis method The edge shadow and skin line for handling face, to identify face characteristic.

Wherein, Local Features Analysis (Local Feature Analysis, LFA) is a kind of class indicated with local feature It is similar to build the technology of building blocks statistics, can all be formed by the structural unit block synthesis much simplified based on all people's face.LFA makes Distinguish a face with 32 to 50 cell block regions, the point most commonly of selection includes nose, eyes, mouth and specific Bone curvature difference, such as cheek.These cell blocks are formed using complicated statistical technique, they represent entire face, It usually crosses over multiple pixels and represents universal facial contours, but be not the face feature on ordinary meaning.Determine one A face depends not only on characteristics unit block, further depends on their geometry (such as shape and relevant position).Pass through this The characteristic of face is corresponded to a kind of numerical expression of complexity by kind mode, LFA, so that it may carry out recognition of face.LFA people It includes mouth, nose, eyebrow, jaw line and cheekbone that face identifying system, which respectively corresponds acceptable area,.It is analyzed with dynamic edge The shape of face information that method obtains can be reduced the influence of different light environments, and skin line information provides standardized face characteristic Details.173 of face are compared, counted again to the two kinds of information combinations of the shape of face and skin line with Local Features Analysis (LFA) algorithm Characteristic point, no matter being that can obtain a very high discrimination, Ke Yi under which kind of light environment when registration and identification face A people is accurately recognized in million people.

The working principle of the smart lock is: when smart lock is waken up, image capture module acquires the to be identified of shelter Image, processor by face recognition algorithms identify images to be recognized in face, in images to be recognized include face when pair Shelter carries out In vivo detection, and the face characteristic in images to be recognized is extracted when being detected as living body, by the face extracted spy Sign is matched with pre-stored face characteristic, and unlocking control signal is sent if successful match and gives clutch control mould Block controls driving mechanical lock by clutch control module and unlocks；If not being living body or face characteristic through detection shelter Match it is unsuccessful, will not generate unlocking control signal.Smart lock is using completely to the invisible secondary light source skill of no damage to human body It can well identify art, day and night, it can be with non-stop run in 24 hours.

Clutch control module 40 includes clutch, and clutch internal structure includes shell, electromagnet, iron plate, gasket, modeling Tablet and connector, wherein casing is provided with through-hole on electromagnet among electromagnet, which is placed with connection Part is provided with irony gasket on connector, there is round iron plate on gasket, in round iron plate is wrapped in by plastic sheet and shell；Even Fitting side is provided with gear, and centre is arranged groove, is placed with spring in groove；The connector other side is provided with cross and leads Rail.

After processor determines face characteristic successful match, output, which is unlocked, controls signal, controls to clutch control module It is powered, the electromagnet in clutch control module attracts iron plate, and iron plate band mobile gasket and connector push forward, connector and machine Tool is locked connection square column at intracorporal door handle and is slided by cross guide rail.The magnetic force of electromagnet is greater than at door handle and connects at this time The elastic force of spring between square column is connect, square column is connect at connector and lock core and carries out engaged gears, has at this moment just reached door handle and has opened The purpose of lock.

Connector is connect square column with lock core and flicked by spring after power-off, and connector is connected on square column at door handle and carried out Sliding drives iron plate to move backward with gasket, when iron plate reaches plastic sheet position, since plastic sheet and shell are adhesively fixed, and resistance Only iron plate continues to move back, to prevent the pop-up of iron plate from falling off.When signal error, without signal or signal triggering a period of time Afterwards, electromagnet will lose magnetism rapidly in clutch control module.Two square columns mutually divide under the action of middle springs elastic force From gear can not be engaged, and door handle can not also carry out door opening action, have the function that locking.

The technical solution of the present embodiment acquires images to be recognized by image capture module, and infrared supplementary lighting module is acquiring Infrared light is sent when images to be recognized, processor identifies the face in images to be recognized, and when images to be recognized includes face Carry out In vivo detection, when being detected as living body, extract images to be recognized in face characteristic, with pre-stored face characteristic into Row matching sends control signal of unlocking when successful match to clutch control module, and clutch control module control driving is mechanical Lock body is unlocked, to improve safety and the discrimination of smart lock by recognition of face and In vivo detection, is avoided and is passed through photograph Piece carries out identification unlocking, and the identification under dark situations may be implemented by infrared supplementary lighting module.

Based on the above technical solution, described image acquisition module includes infrared camera and colour imagery shot；

Wherein, the infrared camera and the colour imagery shot are connected to the processor respectively；The infrared photography Head is sent to processor for acquiring images to be recognized；The colour imagery shot is sent to place for acquiring color image Manage device；

The smart lock further include:

Display screen is connected to the processor, the coloured silk that the infrared camera for receiving and video-stream processor is sent acquires Chromatic graph picture.

After infrared camera and colour imagery shot collect image, it is sent respectively to processor, by processor by cromogram It is shown as being sent to display screen, and recognition of face and In vivo detection is carried out to the images to be recognized of infrared camera acquisition.Figure As in acquisition module infrared camera and colour imagery shot be binocular camera, the binocular camera and infrared supplementary lighting module group At binocular camera mould group.Infrared supplementary lighting module includes infrared light compensating lamp and optical source wavelength filtering light passing piece, infrared supplementary lighting module The infrared light of transmitting directly or indirectly projects Face datection region, optical source wavelength filtering light passing piece be located at independent acquisition face at Before the infrared camera camera lens of picture, match with the wavelength of independent infrared light supply, realizes the recognition of face under dark situations, solution The case where enabling can not be identified under dark situations of having determined.Wherein, the display screen is chosen as touch display screen, can with user into Row interaction, can also be unlocked by password.The smart lock it is easy to operate, interface hommization, touched using TFT liquid crystal display Screen is touched, support local operation and real-time display function is provided.It is designed using twin-lens and is regarded by special video processing Frequency switches, and the face location information that infrared camera detects, which is fed back to colour imagery shot, may insure camera lens when being destroyed not Will appear accidentally to know causes identification to be unlocked.Infrared face recognition door lock is contactless identification door lock, so that door lock and identified Object do not allow it is easy to pollute, it is safer, hygienic.It is designed, can be prevented because of external force explosion using infrared face recognition and purely mechanic lock body Identification module damage is caused the case where lock body enabling occur.

It is the visual form shown when the image that the display screen of smart lock is shown.Processor can be according to light environment Selection shows color video or infrared video on a display screen, i.e., color video, light are shown under bright light environmental condition Infrared video is shown under the conditions of line dim environment.Video shows that speed is greater than 5fps.That is the speed of camera collection image is greater than 5fps, smart lock carry out recognition of face when recognition speed be greater than 3fps, in a recognition cycle, accuracy of identification: FAR < 0.1%, VR > 95%.Identify that angle can be in 15 degree up and down.

Based on the above technical solution, the also optional alarm including being connected to the processor；

The processor is also used to send alarm control signal when it fails to match to the alarm；

The alarm according to the alarm control signal for alarming.

Wherein, the alarm can be phonetic alarm, smart lock when it fails to match can also by display screen into Row alarm.

Based on the above technical solution, the smart lock is also optional includes:

ZigBee module is connected to the processor, for communicating with external device.

User can select the recognition mode of smart lock in a variety of recognition modes, and recognition mode includes: recognition of face, close Code identification and recognition of face and password identification combination are identified.

Wherein, ZigBee module includes the interface with external device communication, what monitoring was created by Zigbee class ZigbeeReaderThread thread process data packet, this thread can allow terminal to pass through Zigbee module and Zigbee net Connection connects use, carries out data pack receiving and transmitting.ZigBee module physical layer uses UART (Universal Asynchronous Receiver/Transmitter, universal asynchronous receiving-transmitting transmitter) communication interface, no hardware flow control.The UART communication interface Including receive data-interface (RXD), send data-interface (TXD), (GND) and 3.3 volts of power interfaces (VCC), transmission data When baud rate can be set to 38400bps, data bit accounts for 8, and stop position accounts for 1, no parity.

Wherein, the UART communication interface includes UART receiver.The Rx foot of UART is configured to interrupt mode, failing edge touching Hair, I/O port pull-up；Tx foot is configured to common IO foot, and I/O port is high level.When needing to carry out data transmission using UART It waits, needs first to drag down Tx pin, and reconfiguring I/O port is peripheral mode, enables UART receiver, waiting can be into after 50ms Row data communication.After the data transfer ends, UART receiver is deactivated again, and configures the I/O pin of UART to interrupt mould Formula.

For the data of single byte in UART, a data being made of multibyte are made according to UART standard transmission It is transmitted with little endian mode.Such as: user password is expressed as Binary Zero b0010 0,000 0,001 1000 i.e. hexadecimal 0x2018, the data of UART transmission at this time are as follows: 0x18 0x20；Temporary password effective time 259 minutes i.e. hexadecimal 0x0103, the data of UART transmission at this time are as follows: 0x03 0x01；The region switch gate state notifying order DATA: Time= 0x01020304, ID=0x0506, Type=0x07, the data of UART transmission at this time are as follows: 0x04 0x03 0x02 0x01 0x06 0x05 0x07。

When smart lock and external device are communicated, the two is likely to initiate communication, in order to avoid communication bus It forces and conflicts, lead to data-bag lost or entanglement, increase communication anti-collision mechanism.The principle of mechanism is the double of serial communication Side can apply for the control of bus, and the side for initiating communication first sends request communication command, if other side is idle and returns to ACK, So initiating one side of communication is host, and another party is slave, and host can send other lives after receiving the corresponding ACK of slave It enables and completes communication affairs.Communication conflict if it exists then carries out in accordance with the following steps: smart lock and external device either side are initiated When communication, request communication command is sent；Slave sends the ACK of unsolicited communication command；Both sides enter random time waiting, need It initiates one side of communication and sends request communication command again, get the corresponding ACK of request communication command until initiating one side of communication, Host sends other orders and completes communication.

Wherein, Fig. 2 is the structural schematic diagram of the power supply in smart lock provided by the embodiment of the utility model, as shown in Fig. 2, Power supply 60 is optional include: main power source 61, backup power source 62, power switching circuit 63,64,3.3 volts of reduction voltage circuits 65 of division module, 5 volts of booster circuits 66 and voltage increase and current constant circuit 67；

Wherein, the first input end of the output end connection power switching circuit 63 of main power source 61, the output of backup power source 62 Second input terminal of end connection power switching circuit 63, the output end of power switching circuit 63 are separately connected division module 64,3.3 Lie prostrate the input terminal of reduction voltage circuit 65,5 volts of booster circuits 66 and voltage increase and current constant circuit 67；

Power switching circuit 63 is for selecting main power source 61 or backup power source 62 to be powered；

The feeder ear of the output end connection image capture module 20 of division module 64, for being supplied to image capture module 20 Electricity；

3.3 volts of reduction voltage circuits 65 connect the feeder ear of processor 10, the power supply drop for inputting power switching circuit 63 Output is powered to processor 10 after pressure is 3.3 volts；

5 volts of booster circuits 66 connect the feeder ear of clutch control module 40, for input power switching circuit 63 Output is powered to clutch control module 40 after power boost is 5 volts；

Voltage increase and current constant circuit 67 connects the feeder ear of infrared supplementary lighting module 30, for input power switching circuit 63 Power supply carries out constant current output, powers to infrared supplementary lighting module 30.

Wherein, the lithium battery that main power source is 3.7 volts, can be used 4~6 months in the case where battery is fully charged.Partial pressure Module 64 include 1.8 volts of output ends and 2.8 volts of output ends, 2.8 volts of voltages that 2.8 volts of output ends exports to touch display screen with Image capture module power supply, 1.8 volts of voltages that 1.8 volts of output ends export are to wake-up key, electronic lock switch and channel switch etc. Power supply.3.3 volts of reduction voltage circuit 65 and 5 volt booster circuits 66 contribute to pressure stabilizing.The output end of 5 volts of booster circuits 66 also connects The input terminal for connecing backup power source 62, for being charged to backup power source when the electricity of backup power source is low.Clutch control module 40 Including motor control chip, the motor control chip can control chip for the motor special of TI.

By main power source, backup power source and power switching circuit, can be very good to avoid drawing electricity low for smart lock power supply The case where can not identifying unlocking, and be voltage required for modules by power switching circuit conversion, guarantee each module Normal work, and reduce power consumption.

Optionally, power switching circuit 63 is electric with 3.3 volts of reduction voltage circuits, 65,5 volts of booster circuits 66 and voltage increase and current constant respectively Load switch is connected between road 67.To which in the standby state, each load switch can be disconnected, to reduce the function of smart lock Consumption.

Optionally, power supply 60 further includes emergency power supply interface and voltage reduction module, the emergency power supply interface connection decompression mould The input terminal of block, the third input terminal of the output end connection power switching circuit 63 of the voltage reduction module, answers urgent telegram for providing Source.The emergency power supply interface is USB interface, can in the case that the main power source and backup power source in smart lock are no electric Charger baby is inserted into emergency power supply interface, to start each module in smart lock, recognition of face and In vivo detection is carried out, avoids The case where electricity can not open the door when low.

Embodiment two

Fig. 3 is the flow chart for the method that a kind of control smart lock that the utility model embodiment two provides is opened, the intelligence Can lock is smart lock described in the utility model any embodiment, which is to control unlatching by recognition of face.Such as Shown in Fig. 3, this method specifically comprises the following steps:

Step 210, infrared light is emitted by infrared supplementary lighting module, and by image capture module acquisition shelter wait know Other image, and it is sent to processor.

It carries out identifying that user can press the wake-up key of smart lock, to call out when unlocking starting face identification functions Modules in awake smart lock work, and processor is controlled powers to infrared supplementary lighting module, so that infrared light filling mould Infrared light occurs for block, and simultaneous processor controls the images to be recognized of image capture module acquisition shelter, and image capture module is adopted Processor is sent to after collecting images to be recognized.It is adopted when image capture module acquires images to be recognized with default frame rate Collection, what is got is the video flowing of shelter, thus processor can choose it is relatively clear or biggish including face range Image carries out recognition of face and feature extraction.

Step 220, the face in the images to be recognized is detected by processor, and includes in the images to be recognized In vivo detection is carried out to the shelter when face and extracts the face characteristic in the images to be recognized when being detected as living body, It is matched with pre-stored face characteristic, and sends control signal of unlocking to clutch control module in successful match.

After processor receives the images to be recognized of image capture module transmission, Face datection is carried out to images to be recognized, Whether include face, and when including face, carry out Face detection if detecting in images to be recognized.When including face, further To shelter carry out In vivo detection, only when being detected as living body, just extraction images to be recognized in face characteristic, and with it is preparatory The face characteristic of storage carries out characteristic matching, by setting a threshold value, determined when similarity is more than this threshold value matching at Function determines that it fails to match if being not above the threshold value, and processor controls clutch control module progress in successful match It unlocks.

When extracting face characteristic, dynamic local Signature Analysis Techique can be used to extract face characteristic, i.e., first into The pretreatment of row images to be recognized removes noise excessively high in images to be recognized, by the images to be recognized peripheral adjustment of input The method migration of detection is at two-symbol image, then extracts face texture, is then come using Local Features Analysis method The edge shadow and skin line for handling face, to identify face.

When controlling smart lock unlatching by recognition of face, internal interface mainly includes system setting, user management, sets safely It sets and advanced setting, system setting mainly includes basic configuration, system time and network configuration etc., user management mainly includes increasing Add new user, editor user, delete user and search user etc., it can the face characteristic of multiple users is saved by setting, Basis as identification.

Step 230, signal control driving mechanical lock is controlled according to the unlocking by clutch control module to unlock.

Processor in face characteristic successful match, power to clutch control module, thus clutch control mould by control Block drives the intracorporal component of mechanical lock to unlock.If item for disposal is in face characteristic, it fails to match, will not drive clutch Control module, and then not will do it unlocking.

It is identifying successfully or when recognition failures, can all generate an identification record, checking that smart lock identifies convenient for user Situation.And when identifying successfully, also the face characteristic in the images to be recognized can be replaced the pre-stored face Corresponding face characteristic in feature, to guarantee that the face characteristic saved is the nearest information material of user, so as to always just Really identification face.

The technical solution of the present embodiment emits infrared sight by infrared supplementary lighting module, and image capture module acquires shelter Images to be recognized, processor detect images to be recognized in face, and in images to be recognized include face when to shelter Carry out In vivo detection, when being detected as living body extract images to be recognized in face characteristic, with pre-stored face characteristic into Row matching sends control signal of unlocking in successful match to clutch control module, is controlled and driven by clutch control module Mechanical lock is unlocked, to improve safety and the discrimination of smart lock by recognition of face and In vivo detection, is avoided logical It crosses photo and 3D faceform carries out identification unlocking, and the identification under dark situations may be implemented by infrared supplementary lighting module, For user without carrying card, recognition speed is fast, simple and convenient.

Based on the above technical solution, described image acquisition module includes infrared camera and colour imagery shot；

Images to be recognized is acquired by image capture module, comprising:

Images to be recognized is acquired by infrared camera, color image is acquired by colour imagery shot, and red by receiving The reflection light of the infrared light of outer supplementary lighting module transmitting；

In vivo detection is carried out to the shelter by processor, including

The time of infrared light is emitted according to infrared supplementary lighting module by processor and infrared camera receives reflection light Time, determine the wavelength of each reflection light, according to the wavelength of each reflection light carry out described point generate an image, will give birth to At image be overlapped with the images to be recognized, and determine coincidence value, when the coincidence value is greater than default trust value, really The fixed shelter is living body.

Infrared camera and colour imagery shot in image capture module are binocular camera.When carrying out In vivo detection, according to Described point is carried out according to the wavelength of reflection light, so as to generate an image, the image of generation and images to be recognized are carried out It overlaps, and obtains coincidence value, if coincidence value is greater than default trust value, it is determined that shelter is living body.Pass through this method In vivo detection is carried out, testing result is more accurate, so as to improve the safety of smart lock.

Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended Scope of the claims determine.

Claims (8)

1. a kind of smart lock, which is characterized in that the smart lock include: processor, image capture module, infrared supplementary lighting module, Clutch control module, mechanical lock and power supply；

Described image acquisition module is connected to the processor, and for acquiring the images to be recognized of shelter, and is sent to described Processor；

The infrared supplementary lighting module is connected to the processor, for emitting infrared light when acquiring images to be recognized；

The processor receives the images to be recognized to generate control signal of unlocking, and the unlocking control signal is based on processor Identify the face in the images to be recognized, and in the images to be recognized include face when to the shelter carry out living body Detection, when being detected as living body, extracts the face characteristic in the images to be recognized, with the progress of pre-stored face characteristic With when generate；

The clutch control module is connected to the processor, for receiving the unlocking control signal, according to the unlocking Signal is controlled, control driving mechanical lock is unlocked；

The power supply respectively with described image acquisition module, infrared supplementary lighting module, processor and the clutch control module Feeder ear connection, for supplying described image acquisition module, infrared supplementary lighting module, processor and the clutch control module Electricity.

2. smart lock according to claim 1, which is characterized in that described image acquisition module includes infrared camera and coloured silk Color camera；

Wherein, the infrared camera and the colour imagery shot are connected to the processor respectively；The infrared camera is used In acquisition images to be recognized, and it is sent to processor；The colour imagery shot is sent to processing for acquiring color image Device；

The smart lock further include:

Display screen is connected to the processor, the cromogram that the infrared camera for receiving and video-stream processor is sent acquires Picture.

3. smart lock according to claim 2, which is characterized in that the display screen is touch display screen.

4. smart lock according to claim 1, which is characterized in that further include the alarm being connected to the processor；

The processor is also used to send alarm control signal when it fails to match to the alarm；

The alarm according to the alarm control signal for alarming.

5. smart lock according to claim 1, which is characterized in that the power supply includes: main power source, backup power source, power supply Switching circuit, division module, 3.3 volts of reduction voltage circuits, 5 volts of booster circuits and voltage increase and current constant circuit；

Wherein, the output end of main power source connects the first input end of the power switching circuit, the output end of the backup power source The second input terminal of the power switching circuit is connected, the output end of the power switching circuit is separately connected the partial pressure mould Block, 3.3 volts of reduction voltage circuits, 5 volts of booster circuits and voltage increase and current constant circuit input terminal；

The power switching circuit, for selecting main power source or backup power source to be powered；

The feeder ear of the output end connection described image acquisition module of the division module, for being supplied to described image acquisition module Electricity；

3.3 volts of reduction voltage circuits connect the feeder ear of the processor, the power supply for inputting the power switching circuit Output is powered to the processor after decompression is 3.3 volts；

5 volts of booster circuits connect the feeder ear of the clutch control module, for inputting the power switching circuit Power boost be 5 volts after output give the clutch control module power supply；

The feeder ear of infrared supplementary lighting module described in the voltage increase and current constant circuit connection, for input the power switching circuit Power supply carries out constant current output, to the infrared supplementary lighting module power supply.

6. smart lock according to claim 5, which is characterized in that the power switching circuit is dropped with described 3.3 volts respectively Load switch is connected between volt circuit, 5 volts of booster circuits and voltage increase and current constant circuit.

7. smart lock according to claim 5, which is characterized in that the power supply further includes emergency power supply interface and decompression mould Block, the emergency power supply interface connect the input terminal of the voltage reduction module, and the output end of the voltage reduction module connects the power supply The third input terminal of switching circuit, for providing emergency power supply.

8. smart lock according to claim 1, which is characterized in that further include:

ZigBee module is connected to the processor, for communicating with external device.