CN217061074U - An access control device and security system based on face recognition - Google Patents

Abstract

The utility model provides an access control device and a security system based on face recognition, and particularly relates to the technical field of security monitoring. Wherein, the access control device based on face recognition includes a main control board, a camera and a display screen are arranged on the main control board, the camera and the display screen are respectively connected with the main control board, and the main control board is also connected with at least An expansion board is connected, and the expansion board is provided with at least one access control detection unit. The utility model can reduce the cost and improve the efficiency of face recognition.

Description

An access control device and security system based on face recognition

technical field

The utility model relates to the technical field of security monitoring, in particular to an access control device and a security system based on face recognition.

Background technique

Existing face recognition access control devices integrate all peripheral functions through the entire main control board, such as temperature measurement, card swiping, access control switches and voice prompts. In addition, the main control boards of the existing face recognition access control devices mostly use Linux motherboards, which increases the overall cost of the face recognition access control devices. If there are problems with some peripherals, the entire Linux motherboard will be returned to the factory for maintenance. , and reduce the liquidity of the motherboard. In addition, in the process of upgrading the main control board, the controller on the main control board needs to be re-adapted with the peripheral interface of the main control board, which requires a large labor cost. In addition, the resources of the peripheral interface of the main control board are limited. Therefore, all processing logic needs to use the resources of the controller of the main control board, which will cause the AI algorithm to slow down when performing inference analysis, resulting in the failure of face recognition. less efficient.

Utility model content

In view of this, the present application provides an access control device and security system based on face recognition to solve the problems of high cost and low efficiency of face recognition in the prior art.

In a first aspect, a face recognition-based access control device provided by the present application includes a main control board, a camera and a display screen are provided on the main control board, and the camera and the display screen are respectively connected to the main control board , the main control board is also connected with at least one expansion board, and the expansion board is provided with at least one access control detection unit.

Optionally, the access control detection unit includes an expansion board controller, a tamper-proof circuit, a fire protection circuit, and an access control circuit; the expansion board controllers are respectively connected with the main control board, and are used for receiving the control sent by the main control board. signal, and control the anti-dismantle circuit, the fire protection circuit and the access control circuit to perform corresponding actions according to the control signal; the anti-dismantle circuit is connected to the expansion board controller for detecting the Whether the access control device for face recognition has been disassembled; the fire protection circuit is respectively connected with the expansion board controller and the fire alarm; the access control circuit is connected with the expansion board controller for controlling the face-based The switch status of the identified access control device.

Optionally, the tamper-proof circuit includes a first resistor, the first end of the first resistor is connected to the power supply, and the second end of the first resistor is respectively connected to the first end of the first capacitor and the first end of the first overvoltage element. The first end, the first end of the first switch and the control interface of the expansion board controller are connected, the second end of the first capacitor, the second end of the first overvoltage element and the first end of the first switch are connected. Both ends are grounded.

Optionally, the fire protection circuit includes a second resistor, the first end of the second resistor is connected to the control interface of the expansion board controller, and the second end of the second resistor is respectively connected with the first end of the third resistor. , the first end of the first transistor is connected, the second end of the third resistor is connected to the power supply and the first end of the fourth resistor respectively, the second end of the first transistor is connected to the second end of the capacitor The first end is connected, the third end of the first transistor is grounded, the second end of the fourth resistor is connected to the fire alarm, and the first end of the second capacitor is also connected to the second capacitor respectively. The first end of the voltage element, the first end of the fifth resistor and the first end of the sixth resistor are connected, the second end of the second capacitor, the second end of the second overvoltage element and the second end of the fifth resistor are connected. The end is grounded, and the first end of the sixth resistor is respectively connected with the second end of the fourth resistor and the fire alarm.

Optionally, the access control circuit includes an input sub-circuit and an output sub-circuit;

The input sub-circuit includes a first access control controller, the first end of the first access control controller is connected to the power supply; the second end of the first access control controller is connected to the first end of the second triode, The second end of the second triode is respectively connected with the power supply, the communication interface of the main control board and the third end of the second triode, and the third end of the second triode Ground; the third end of the first access control controller and the first end of the third capacitor are both grounded; the fourth end of the first access control controller is respectively connected to the power supply and the communication interface of the expansion board controller and the second end of the third capacitor is connected;

The output sub-circuit includes a second access control controller, the first end of the second access control controller is connected to the power supply; the second end of the second access control controller is connected to the first end of the third triode, The second end of the third triode is grounded, the third end of the third triode is connected to the communication interface of the expansion board controller, and the third end of the second access controller is connected to the third The first end of the four capacitors is grounded; the fourth end of the second access controller is respectively connected to the power supply, the communication interface of the main control board and the second end of the fourth capacitor.

Optionally, an alarm device is also included, the alarm device is connected to the expansion board controller, and is used for sending out an alarm signal when receiving a control signal from the expansion board controller.

Optionally, the access control detection unit further includes a temperature detection subunit, an iris detection subunit, a fingerprint detection subunit, a communication subunit, a sound pickup subunit, a brightness compensation subunit, a data readout subunit, and a temperature detection subunit, which are all connected to the expansion board controller. Take subunits, relays and reminder subunits.

Optionally, the face recognition-based access control device includes a power supply unit, the power supply unit is connected to the main control board and at least one expansion board respectively, and is used for supplying power to the main control board and at least one expansion board.

Optionally, the face recognition-based access control device includes a housing, and the power supply unit, the main control board and at least one expansion board are arranged in the housing.

In a second aspect, the present application provides a security system, including the above-mentioned face recognition-based access control device.

The technical scheme of the utility model has the following advantages:

The access control device based on face recognition provided by the utility model, by setting an expansion board, and using at least one access control detection unit set on the expansion board to perform access control detection; if there is a problem with the access control detection unit (peripheral) of the access control device, The expansion board can be directly replaced to avoid replacing the entire main board, which can reduce the cost and improve the circulation of the main board. By using the control resources (control interface, etc.) of the expansion board, the resources of the controller of the main control board can also be reduced. Used in order to improve the speed of AI algorithms when performing inference analysis. Therefore, the utility model can reduce the cost and improve the efficiency of face recognition.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the following descriptions The accompanying drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

Fig. 1 is the structural representation of the access control device based on face recognition provided by the utility model;

Fig. 2 is the structural representation of the anti-dismantling circuit in the access control device based on face recognition provided by the present invention;

3 is a schematic structural diagram of a fire protection circuit in an access control device based on face recognition provided by the present invention;

4 is a schematic structural diagram of an input subunit in an access control circuit in an access control device based on face recognition provided by the present invention;

5 is a schematic structural diagram of an output subunit in an access control circuit in an access control device based on face recognition provided by the present invention;

FIG. 6 is a schematic structural diagram of the security system provided by the present invention.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, with a specific orientation. Therefore, it should not be construed as a limitation on the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as there is no conflict with each other.

Please refer to FIG. 1 , which is a schematic structural diagram of an access control device based on face recognition provided by the present invention. Specifically, the face recognition-based access control device includes a main control board 10, the main control board 10 is provided with a camera 101 and a display screen 102, the camera 101 and the display screen 102 are respectively connected to the main control board 10, the main control board 10 is also connected with at least one expansion board 20, and at least one access control detection unit 201 is arranged on the expansion board 20.

In this embodiment, the expansion board 20 is provided, and at least one access control detection unit 201 set on the expansion board 20 is used to perform access control detection; if there is a problem with the access control detection unit 201 (peripheral) of the access control device, it can be directly replaced The expansion board 20 avoids replacing the entire main control board 10 , thereby reducing the cost and improving the circulation of the main control board 10 , and by using the control resources (control interfaces, etc.) of the expansion board 20 , the main control board 10 can be reduced. The resource usage of the controller in order to improve the speed of the AI algorithm when performing inference analysis. Therefore, the utility model can reduce the cost and improve the efficiency of face recognition.

Optionally, the main control board 10 may be a control board with a model of SSA330Q, RK1109, or an Android motherboard of other models.

Optionally, on the main control board 10, the display screen 102 and the camera 101 can be connected to the main control board 10 by soldering pin headers or setting a flexible circuit board, and then can be bound by glue or limiters. The main control board 10 is arranged on the main control board 10 in a bit manner.

Optionally, the camera 101 may be a lens sensor such as gc2053 or imx307, and the display screen 102 may be a 5-inch or 7-inch TFT-LCD screen.

In this embodiment, the use of the lens sensor can collect high-quality face images, which is conducive to face recognition and improves the detection efficiency of the access control device; the use of a TFT-LCD screen is conducive to all-round screen display, which is convenient for users to operate.

Optionally, the expansion board 20 includes at least one access control detection unit 201 . The access control detection unit 201 may include: an expansion board controller, a tamper-proof circuit, a fire protection circuit, an access control circuit, a temperature detection subunit, an iris detection subunit, a fingerprint detection subunit, a communication subunit, a sound pickup subunit, Brightness compensation subunit, data reading subunit, relay and reminder subunit.

The expansion board controller and the main control board 10 control interface, tamper circuit, fire protection circuit, access control circuit, temperature detection sub-unit, iris detection sub-unit, fingerprint detection sub-unit, communication sub-unit, pickup sub-unit, brightness Compensation subunit, data reading subunit, relay and reminder subunit are connected.

The face recognition-based access control device further includes an alarm, which is connected to the expansion board controller and used to send out an alarm signal when receiving a control signal from the expansion board controller. The alarm may be an audible and visual alarm.

The expansion board controller is used to receive the control signal sent by the main control board 10, and control the tamper-proof circuit, fire protection circuit and access control circuit to perform corresponding actions according to the control signal; Alarm, control the temperature detection sub-unit to perform temperature measurement and other operations.

Optionally, the anti-disassembly circuit is used to detect whether the access control device based on face recognition is disassembled, so as to prevent malicious disassembly of the access control device.

Optionally, the fire protection circuit is used to detect whether the current environment is in a fire alarm state. If the fire protection circuit detects that the current environment is in a fire alarm state, it sends a fire protection signal to the expansion board controller, and the expansion board controller controls the relay to open the door.

Optionally, the access control circuit is used to control the switch state of the access control device based on face recognition.

Optionally, the temperature detection subunit is used to detect the body temperature information of the user who is performing face recognition, wherein the temperature detection unit is a temperature sensor.

Optionally, the iris detection subunit is used to identify the iris information of the user and perform user identity verification. When the access control verification is passed, the access control restriction is cancelled and the door is opened. Wherein, the iris information can be collected by a camera on the main control board 10, or can be collected by an independent camera.

Optionally, the fingerprint detection subunit is used to identify the user's fingerprint information and perform user identity verification. When the access control verification is passed, the access control restriction is cancelled and the door is opened. The fingerprint information can be collected by a fingerprint sensor or a fingerprint collection device.

Optionally, the communication sub-unit is used to realize the communication between the main control board 10 and the expansion board, wherein the communication protocol used by the communication sub-unit is serial communication. For example, communication can be performed through a USB interface, and data reading and collection between the expansion board and the main control board 10 can be realized through the USB interface, which is beneficial to the user's access control management.

Optionally, the sound pickup subunit is used to collect the user's voice information, convert the voice information into user identity information, and open the door after verifying the user identity information. For example, the voice pickup subunit collects the user's voice information "Zhang San", and the expansion board analyzes the voice information, determines the identity information of Zhang San, and then opens the door. The pickup subunit may be a microphone.

Optionally, the brightness compensation subunit is used to fill light in the environment of face recognition, wherein the brightness compensation subunit may be at least one adjustable LED.

Optionally, the data reading subunit may be a card reader, and the data reading subunit performs user identification by reading the user ID card. When the user identification is passed, the access restriction is cancelled and the door is opened. It should be noted that when the data reads the user ID card of the subunit, the reminding subunit will emit a beep to remind the action of swiping the card or the action of reading the user identity data. In addition, when the user's identity recognition fails, the face recognition fails, the user's access control authority is invalid, or the access control device is damaged, the reminder sub-unit emits a buzzer to realize the reminder function.

Optionally, the switch of the relay can be controlled by the control signal sent by the expansion board controller to complete the switch of the door and realize the access control.

Optionally, the communication mode between the main control board 10 and the expansion board 20 may be serial communication.

Optionally, in order to facilitate software and hardware upgrades, the main control board 10 and the expansion board 20 may be configured with the same communication protocol.

Optionally, the main control board 10 and the expansion board 20 can be upgraded in a unified manner or individually according to user requirements.

Optionally, in order to prevent the access control device from being maliciously disassembled, an anti-disassembly circuit is set in this embodiment of the present application. When a button or switch in the anti-disassembly circuit is triggered, an alarm signal will be sent to the expansion board controller, and the expansion board controller will trigger the alarm signal. Alarm siren.

In this embodiment, when the access control detection is performed, the main control board 10 collects and recognizes the face information, and then sends a control signal to the expansion board controller according to the face recognition result. The expansion board controller receives the control signal and executes the specific Door opening or closing action.

In addition, in this embodiment, the expansion board controller can also perform corresponding access control actions by acquiring the signals collected by the access control detection unit 201, for example: when the fire protection circuit in the access control detection unit 201 triggers the fire alarm signal, the expansion board Alarm signal, the control relay is in the open state.

In the face recognition-based access control device provided in this embodiment, by setting the expansion board 20 , the processing capability of the main control board 10 is released, and the data processing speed of the main control board 10 is improved.

Please refer to FIG. 2 , which is a schematic structural diagram of a tamper-proof circuit in an access control device based on face recognition. The tamper-proof circuit includes: a first resistor R1, a first capacitor C1, a first overvoltage element D1 and a first switch K1. The first end of the first resistor R1 is connected to the power supply, and the second end of the first resistor R1 is respectively connected to the first end of the first capacitor C1, the first end of the first overvoltage element D1, and the first end of the first switch K1. One end is connected to the control interface of the expansion board controller, and the second end of the first capacitor C1, the second end of the first overvoltage element D1 and the second end of the first switch K1 are grounded.

In the tamper-proof circuit, in order to ensure the normal operation of the circuit, the power supply voltage of the circuit is 3.3V.

Preferably, the first overvoltage element D1 is a varistor, and the use of the varistor can suppress abnormal overvoltage in the circuit and protect the circuit from damage by the overvoltage.

For example: in the anti-theft mode of the access control device, if the access control device is disassembled, that is, the first switch K1 is triggered, the expansion board receives the alarm signal from the first switch K1, and the expansion board controls the sound and light alarm to alarm remind.

Please refer to FIG. 3 , which is a schematic structural diagram of a fire protection circuit in an access control device based on face recognition. The fire protection circuit includes: a second resistor R2, a third resistor R3, a first transistor Q1, a fourth resistor R4, a second capacitor C2, a fifth resistor R5 and a sixth resistor R6. The first end of the second resistor R2 is connected to the control interface of the expansion board controller, and the second end of the second resistor R2 is respectively connected to the first end of the third resistor R3 and the first end of the first transistor Q1 , the second end of the third resistor R3 is connected to the power supply and the first end of the fourth resistor R4 respectively, the second end of the first transistor Q1 is connected to the first end of the second capacitor C2, the first transistor Q1 The third end of the resistor R4 is grounded, the second end of the fourth resistor R4 is connected to the fire alarm, the first end of the second capacitor C2 is also connected to the first end of the second overvoltage element D2 and the first end of the fifth resistor R5 respectively is connected to the first end of the sixth resistor R6, the second end of the second capacitor C2, the second end of the second overvoltage element D2 and the second end of the fifth resistor R5 are grounded, and the first end of the sixth resistor R6 is respectively Connect with the second end of the fourth resistor R4 and the fire alarm.

In the fire protection circuit, the second overvoltage element D2 may be a varistor or a thyristor. For example: when the fire alarm is triggered, the expansion board control relay is in the open state.

Optionally, the access control circuit includes an input sub-circuit and an output sub-circuit.

The input sub-circuit includes a first access control controller M1, the first end of the first access control controller M1 is connected to the power supply; the second end of the first access control controller M1 is connected to the first end of the second transistor Q2, The second end of the second triode Q2 is respectively connected with the power supply, the communication interface of the main control board 10 and the third end of the second triode Q2, and the third end of the second triode Q2 is grounded; the first access control control The third end of the device M1 and the first end of the third capacitor C3 are both grounded; the fourth end of the first access control controller M1 is respectively connected with the power supply, the communication interface of the expansion board controller and the second end of the third capacitor C3;

The output sub-circuit includes a second access control controller M2, the first end of the second access control controller M2 is connected with the power supply; the second end of the second access control controller M2 is connected with the first end of the third transistor Q3, the third The second end of the transistor Q3 is grounded, the third end of the third transistor Q3 is connected to the communication interface of the expansion board controller, and the third end of the second access control controller M2 is respectively connected to the first end of the fourth capacitor C4 Ground; the fourth end of the second access control controller M2 is respectively connected with the power supply, the communication interface of the main control board 10 and the second end of the fourth capacitor C4.

The access control circuit also needs to meet the Wiegand protocol, that is, when the card reader recognizes a valid access card, it transmits the key information of the card in the form of Wiegand protocol, and then converts it into data and sends it to the main control board 10 or the extension Board controller, the controller verifies that the key information is valid and then opens the door.

Please refer to Fig. 4 and Fig. 5, Fig. 4 is the structural representation of the input sub-circuit in the access control circuit in the access control device based on face recognition; Fig. 5 is the output sub-circuit in the access control circuit in the access control device based on face recognition Schematic diagram of the structure.

In addition, in order to ensure the normal operation of the access control circuit, the power supply used in the access control circuit includes a first power supply of 5V and a second power supply of 3.3V.

In practical applications, in order to ensure the normal operation of the access control circuit and prevent overcurrent or overvoltage of the access control circuit, it is necessary to add the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, and the tenth resistor to the input sub-circuit. R10, the eleventh resistor R11 and the fifth capacitor C5.

The input sub-circuit includes a first access control controller M1, the first end of the first access control controller M1 is connected to the first end of the tenth resistor R10, and the second end of the tenth resistor R10 is connected to the first power supply (5V); The second end of the first access control controller M1 is connected to the first end of the second transistor Q2, and the second end of the second transistor Q2 is respectively the first end of the seventh resistor R7 and the first end of the eighth resistor R8. terminal, the second terminal of the fifth capacitor, and the second terminal of the ninth resistor R9, the second terminal of the seventh resistor R7 is connected to the communication interface of the main control board 10, and the second terminal of the eighth resistor R8 is connected to the first power supply connected, the third end of the second transistor Q2 is respectively grounded with the second end of the fifth capacitor C5 and the second end of the ninth resistor R9; the third end of the first access control controller M1 and the third end of the third capacitor C3 One end is grounded; the fourth end of the first access control controller M1 is respectively connected to the first end of the eleventh resistor R11, the communication interface of the expansion board controller and the second end of the third capacitor C3, and the second end of the eleventh resistor R11 The second terminal is connected to the second power supply (3.3V).

A twelfth resistor R12, a thirteenth resistor R13 and a fourteenth resistor R14 need to be added to the output sub-circuit.

The output sub-circuit includes a second access control controller M2, the first end of the second access control controller M2 is connected to the first end of the thirteenth resistor R13, and the second end of the thirteenth resistor R13 is connected to the first power supply (5V) connection; the second end of the second access control controller M2 is respectively connected with the first end of the third transistor Q3 and the first end of the twelfth resistor R12, the second end of the third transistor Q3 is grounded, and the third The third end of the transistor Q3 is respectively connected to the second end of the twelfth resistor R12 and the communication interface of the expansion board controller, and the third end of the second access control controller M2 is respectively grounded to the first end of the fourth capacitor C4 ; The fourth end of the second access control controller M2 is respectively connected with the first end of the fourteenth resistor R14, the communication interface of the main control board 10 and the second end of the fourth capacitor C4, and the second end of the fourteenth resistor R14 Connect to the second power supply (3.3V).

Optionally, the face recognition-based access control device is also provided with a power supply unit, wherein the power supply unit is respectively connected with the main control board 10 and at least one expansion board 20, and is used to supply power to the main control board 10 and at least one expansion board 20, and supply power. The unit can also be powered by batteries or by connecting a charger.

For the security system provided by this embodiment, see FIG. 6 , which is a structural block diagram of the security system provided by this embodiment. The security system is provided with the face recognition-based access control device provided in the above embodiments, and the device includes a housing 30 , a main control board 10 and at least one expansion board 20 .

The main control board 10 is provided with a camera 101 and a display screen 102. The camera 101 and the display screen 102 are both connected to the main control board 10. The main control board 10 collects face information, recognizes the face information, and determines whether The door needs to be opened or closed for the currently recognized object.

When it is judged that the current identification object needs to open the door, the main control board 10 will generate a door opening control signal; and send its door opening control signal to the expansion board 20, and the expansion board controller receives the door opening control signal and controls the door according to the door opening control signal. The access control detection unit 201 acts, for example: the temperature detection subunit performs temperature collection on the recognition object, or controls the iris detection subunit to perform iris detection on the recognition object, or controls the fingerprint detection subunit to perform fingerprint detection on the recognition object, the collected temperature After the /iris/fingerprint information matches the preset data, the expansion board controller will control the relay to perform the door opening operation.

Optionally, the access control detection unit 201 may include a card reader, and the card reader is used to identify the identity information of the access control card, transmit the identity information through the access control circuit, and then control the relay to open the door through the expansion board controller.

Optionally, the access control detection unit 201 may include a fill light, and the user may operate the display screen 102 to fill the shooting environment of the user to be identified.

Optionally, the access control detection unit 201 may further include a USB interface. In order to facilitate software upgrade, the access control device is provided with a USB interface to facilitate the use of the upgrade.

In this embodiment, by setting the expansion board 20 to share the computing power of the main control board 10, the resource occupation of the main control board 10 is reduced, thereby improving the recognition accuracy and recognition efficiency of the access control device. In addition, setting the expansion board 20 can also The whole machine is prevented from being replaced due to the failure of the main board, thereby increasing the circulation of the main control board 10 or the expansion board 20 and reducing the production and maintenance costs of the access control device.

Optionally, the temperature detection subunit may be a temperature sensor, the iris detection subunit may be an iris sensor, and the fingerprint detection subunit may be a fingerprint sensor.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. The utility model provides an entrance guard's device based on face identification, its characterized in that, includes the master control board, be provided with camera and display screen on the master control board, camera and display screen respectively with the master control board is connected, the master control board still is connected with at least one expansion board, be provided with at least one entrance guard detecting element on the expansion board.

2. The entrance guard device based on face recognition of claim 1, wherein the entrance guard detection unit comprises an expansion board controller, an anti-disassembly circuit, a fire-fighting circuit and an entrance guard control circuit; the expansion board controller is respectively connected with the main control board and used for receiving the control signal sent by the main control board and controlling the anti-dismantling circuit, the fire-fighting circuit and the access control circuit to perform corresponding actions according to the control signal; the anti-disassembly circuit is connected with the expansion board controller and is used for detecting whether the access control device based on the face recognition is disassembled; the fire fighting circuit is connected with the expansion board controller; the entrance guard control circuit is connected with the expansion board controller and used for controlling the opening and closing state of the entrance guard device based on the face recognition.

3. The door control device based on face recognition of claim 2, wherein the anti-tamper circuit comprises:

the first end of the first resistor is connected with a power supply, the second end of the first resistor is respectively connected with the first end of the first capacitor, the first end of the first overvoltage element, the first end of the first switch and the control interface of the expansion board controller, and the second end of the first capacitor, the second end of the first overvoltage element and the second end of the first switch are grounded.

4. The door access device based on face recognition according to claim 2, wherein the fire-fighting circuit comprises:

a second resistor, a first end of the second resistor is connected with the control interface of the expansion board controller, the second end of the second resistor is respectively connected with the first end of the third resistor and the first end of the first triode, the second end of the third resistor is respectively connected with a power supply and the first end of the fourth resistor, the second end of the first triode is connected with the first end of the second capacitor, the third end of the first triode is grounded, the second end of the fourth resistor is connected with a fire alarm, the first end of the second capacitor is also respectively connected with the first end of the second overvoltage element, the first end of the fifth resistor and the first end of the sixth resistor, the second end of the second capacitor, the second end of the second overvoltage element and the second end of the fifth resistor are grounded, and the first end of the sixth resistor is connected with the second end of the fourth resistor and the fire alarm respectively.

5. The door access device based on face recognition of claim 2, wherein the door access control circuit comprises an input sub-circuit and an output sub-circuit;

the input sub-circuit comprises a first access controller, and a first end of the first access controller is connected with a power supply; a second end of the first gate inhibition controller is connected with a first end of a second triode, a second end of the second triode is respectively connected with the power supply, a communication interface of the main control board and a third end of the second triode, and the third end of the second triode is grounded; the third end of the first access controller and the first end of the third capacitor are both grounded; a fourth end of the first access controller is respectively connected with a power supply, a communication interface of the expansion board controller and a second end of the third capacitor;

the output sub-circuit comprises a second gate inhibition controller, and the first end of the second gate inhibition controller is connected with a power supply; the second end of the second gate inhibition controller is connected with the first end of a third triode, the second end of the third triode is grounded, the third end of the third triode is connected with the communication interface of the expansion board controller, and the third end of the second gate inhibition controller is grounded with the first end of a fourth capacitor; and the fourth end of the second gate inhibition controller is respectively connected with a power supply, a communication interface of the main control board and the second end of the fourth capacitor.

6. The entrance guard device based on face recognition as claimed in claim 1, further comprising an alarm connected to the expansion board controller for sending an alarm signal when receiving a control signal from the expansion board controller.

7. The entrance guard's device based on human face recognition as claimed in any one of claims 2-6, wherein the entrance guard's detection unit further comprises a temperature detection subunit, an iris detection subunit, a fingerprint detection subunit, a communication subunit, a pickup subunit, a brightness compensation subunit, a data reading subunit, a relay and a reminding subunit all connected to the expansion board controller.

8. The entrance guard's device based on face recognition of claim 7, characterized in that, including the power supply unit, the power supply unit is connected with the main control board and at least one expansion board respectively, is used for supplying power to the main control board and at least one expansion board.

9. The entrance guard's device based on face recognition of claim 8, characterized in that, including the casing, power supply unit, the main control board and at least one expansion board set up in the casing.

10. A security system comprising the face recognition based access control device of any one of claims 1-9.

Images