Face recognition module and door lock

Abstract

The utility model provides a kind of face recognition module and door lock, face recognition module includes mounting block;Printed circuit board is connected in mounting block, printed circuit board includes: at least two sub-circuit boards;Mounting plate includes at least two connecting plates, between adjacent two connecting plates connection and form an angle, at least one sub-circuit board is provided on one connecting plate;Visible light camera unit is connected on one sub-circuit board;Infrared camera unit is connected on another sub-circuit board;Image processing unit is connected on one sub-circuit board, and image processing unit is electrically connected with visible light camera unit and infrared camera unit respectively;Main control unit is connected on one sub-circuit board, and main control unit is electrically connected with image processing unit.The face recognition module of the utility model has all-weather adaptability, and visible light camera unit and infrared camera unit can be simultaneously or separately controlled.

Description

Technical Field

[0001] This utility model relates to the field of facial recognition technology, and in particular to a facial recognition module and a door lock. Background Technology

[0002] By applying facial recognition technology to smart locks and access control systems, a contactless unlocking experience can be achieved, offering convenience while also enhancing security. Ordinary cameras use visible light for facial recognition, while infrared cameras use infrared light. When visible light intensity is low, auxiliary light sources are needed to increase the intensity for continued recognition with the ordinary camera, or the infrared camera can be used directly. In current technology, when using both ordinary and infrared cameras simultaneously, each camera needs to be installed and controlled separately, increasing installation and control costs. Therefore, there is room for improvement. Utility Model Content

[0003] This utility model provides a face recognition module and door lock to solve the technical problem that existing face recognition modules use both ordinary cameras and infrared cameras, resulting in high installation and control costs.

[0004] This utility model proposes a face recognition module, comprising:

[0005] Mounting block;

[0006] A printed circuit board, connected to the mounting block, the printed circuit board comprising:

[0007] At least two sub-circuit boards;

[0008] The mounting plate includes at least two connecting plates, with adjacent connecting plates connected to form an included angle, and at least one sub-circuit board is provided on one of the connecting plates;

[0009] The visible light camera unit is connected to a sub-circuit board;

[0010] The infrared camera unit is connected to another sub-circuit board;

[0011] An image processing unit is connected to a sub-circuit board, and the image processing unit is electrically connected to the visible light camera unit and the infrared camera unit respectively;

[0012] The main control unit is connected to a sub-circuit board and is electrically connected to the image processing unit.

[0013] In one embodiment of this utility model, the face recognition module further includes:

[0014] A power module is connected to a sub-circuit board, and the power module is electrically connected to the main control unit;

[0015] A voice processing unit is connected to a sub-circuit board and is electrically connected to the main control unit.

[0016] In one embodiment of this utility model, two adjacent connecting plates are fixedly connected and bent, and are attached to the surface of the mounting block. The visible light camera unit and the infrared camera unit are respectively disposed on two different sub-circuit boards at the bend of the connecting plate.

[0017] In one embodiment of this utility model, the angle between the optical axis direction of the visible light camera unit and the optical axis direction of the infrared camera unit is between 30° and 90°.

[0018] In one embodiment of this utility model, the face recognition module further includes:

[0019] Fixing plate;

[0020] A drive motor is connected to the fixed plate, and the output shaft of the drive motor passes through and is connected to the mounting block; the axial direction of the output shaft of the drive motor is perpendicular to the optical axis direction of both the visible light camera unit and the infrared camera unit.

[0021] In one embodiment of this utility model, the main control unit is electrically connected to the drive motor.

[0022] This utility model can also provide a door lock, including:

[0023] case;

[0024] The face recognition module described above is disposed on the housing; the optical axis direction of the visible light camera unit and the optical axis direction of the infrared camera unit are directed towards the outside of the housing.

[0025] In one embodiment of this utility model, the door lock further includes:

[0026] A handle is attached to the housing, and the extension direction of the handle is perpendicular to the extension direction of the housing;

[0027] The visible light camera unit and the infrared camera unit are arranged sequentially along the extension direction of the housing.

[0028] In one embodiment of this utility model, the optical axis of the visible light camera unit is oriented toward the handle, and the optical axis of the infrared camera unit is oriented away from the handle;

[0029] Alternatively, the optical axis of the infrared camera unit is oriented toward the handle, while the optical axis of the visible light camera unit is oriented away from the handle.

[0030] In one embodiment of this utility model, the rotation shaft of the drive motor in the face recognition module is perpendicular to the side wall of the housing, and the rotation angle of the visible light camera unit and the infrared camera unit is 0° to 60°.

[0031] The beneficial effects of this utility model are as follows: The face recognition module and door lock proposed in this utility model have all-weather adaptability. The visible light camera unit and the infrared camera unit are respectively set on two different connecting boards, which can be simultaneously scheduled and controlled to monitor different areas. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0033] In the attached diagram:

[0034] Figure 1 This is a structural block diagram of a face recognition module provided in one embodiment of the present invention.

[0035] Figure 2 This is a schematic diagram of the installation of a face recognition module provided in one embodiment of the present invention.

[0036] Figure 3 This is an installation diagram of a face recognition module provided in another embodiment of the present invention.

[0037] Figure 4 This is provided in one embodiment of the present utility model. Figure 3 A schematic diagram of the direction A in the middle.

[0038] Figure 5 This is provided in one embodiment of the present utility model. Figure 3 A schematic diagram of the face recognition module after it has been rotated.

[0039] Figure 6 This is provided in one embodiment of the present utility model. Figure 3 A schematic diagram of the face recognition module after it has been rotated.

[0040] Figure 7 This is a front view of a door lock provided in one embodiment of the present invention.

[0041] Figure 8 This is a side view of a door lock provided in one embodiment of the present invention.

[0042] Figure 9 This is a side view of a door lock provided in one embodiment of the present invention.

[0043] The attached figures are labeled as follows:

[0044] 100. Printed circuit board; 110. Sub-circuit board; 120. Connector board; 101. Main control unit; 102. Image processing unit; 103. Infrared camera unit; 104. Visible light camera unit; 105. Power supply unit; 106. Voice processing unit; 107. Drive motor;

[0045] 20. Mounting block; 30. Drive motor; 310. Rotating shaft; 40. Fixing plate; 50. Housing; 60. Handle. Detailed Implementation

[0046] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0047] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0048] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0049] Please see Figures 1 to 9This utility model proposes a face recognition module and a door lock. In the face recognition module, a visible light camera unit 103 and an infrared camera unit 104 are disposed on a printed circuit board 100, sharing a common substrate. The main control unit 101 can control the visible light camera unit 103 to operate independently, the infrared camera unit 104 to operate independently, or both to operate simultaneously, improving the control efficiency of the two units. Detailed descriptions are provided below using specific embodiments. This utility model also proposes an access control system, which includes at least a face recognition module and a door lock.

[0050] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of this utility model, a face recognition module is proposed, which may include a mounting block 20, a printed circuit board 100, a visible light camera unit 104, an infrared camera unit 103, an image processing unit 102, a main control unit 101, a voice processing unit 106, and a power supply unit 105.

[0051] Specifically, the mounting block 20 serves as the mounting body, connecting the printed circuit board 100. Furthermore, the printed circuit board 100 is equipped with a visible light camera unit 104, an infrared camera unit 103, an image processing unit 102, and a main control unit 101. The image processing unit 102 is electrically connected to the visible light camera unit 104 and the infrared camera unit 103. The main control unit 101 is electrically connected to the image processing unit 102.

[0052] Specifically, the mounting block 20 can be made of aluminum alloy, with a standard 86 box mounting hole at the bottom and a slot for the printed circuit board 100 at the top.

[0053] Specifically, the printed circuit board 100 can be a four-layer FR4 substrate, measuring 40mm × 40mm, and is fixed in the slot of the mounting block 20 with screws. For example... Figure 3 As shown, the printed circuit board 100 includes at least two sub-circuit boards 110 and a mounting plate. The mounting plate includes at least two connecting plates 120, with adjacent connecting plates 120 connected to form an included angle. At least one sub-circuit board 110 is disposed on each connecting plate 120. The at least two connecting plates 120 are fixedly or rotatably connected. The visible light camera unit 104 and the infrared camera unit 103 are respectively disposed on two different connecting plates 120. Of course, in Figure 2 Alternatively, the visible light camera unit 104 and the infrared camera unit 103 can be simultaneously mounted on the same connecting plate 120.

[0054] Specifically, the visible light camera unit 104 can be an OV4689 sensor, arranged on one side of the printed circuit board 100, with a viewing angle of 78°. The infrared camera unit 103 can be an SC031IR sensor, arranged on one side of the printed circuit board 100, and the center distance between it and the visible light camera unit 104 is ≤15mm to ensure field of view overlap.

[0055] Specifically, the image processing unit 102 can be an integrated Hi3516DV300 chip, which simultaneously receives video streams from the visible light camera unit 104 and the infrared camera unit 103 via a MIPI interface. The main control unit 101 can be an STM32F407 chip, which receives the output signals from the image processing unit 104 via an SPI bus.

[0056] Specifically, the power supply unit 105 supplies power to the main control unit 101, which in turn supplies power to the image processing unit 102, the infrared camera unit 103, the visible light camera unit 104, the voice processing unit 106, and the drive motor 107. The power supply unit 105 can be an RT9193 power module. The voice processing unit 106 can have voice recognition functionality and can be an INMP621 microphone paired with a 48kHz / 24bit ADC sampling chip, such as an ES7240L module.

[0057] Therefore, the visible light camera unit 104 and the infrared camera unit 103 share the printed circuit board 100, power supply, and image processing unit 104, thus reducing hardware costs. The main control unit 101 automatically selects the optimal recognition mode based on the light intensity. For example, it can control the visible light camera unit 103 to work independently, or the infrared camera unit 104 to work independently, or it can control both the visible light camera unit 103 and the infrared camera unit 104 to work simultaneously.

[0058] Please see Figure 2 In one embodiment of this utility model, a printed circuit board 100 is attached to the surface of a mounting block 20, and a visible light camera unit 104 and an infrared camera unit 103 are disposed on the same connecting plate 120. The optical axis directions of the visible light camera unit 104 and the infrared camera unit 103 are parallel and face the same side.

[0059] Then, the main control unit 101 automatically selects the optimal recognition mode according to the light intensity. For example, it can control the visible light camera unit 103 to work alone, or control the infrared camera unit 104 to work alone, or control the visible light camera unit 103 and the infrared camera unit 104 to work simultaneously.

[0060] Please see Figure 3 , Figure 4In one embodiment of this utility model, two adjacent connecting plates 120 are fixedly or rotatably connected and are attached to the surface of the mounting block 20. The visible light camera unit 104 and the infrared camera unit 103 are respectively disposed on two different sub-circuit boards 110 corresponding to the two adjacent connecting plates 120. The angle between the optical axis direction of the visible light camera unit 104 and the optical axis direction of the infrared camera unit 103 is between 30° and 90°.

[0061] Specifically, two adjacent connecting plates 120 can be hot-pressed into a bent structure. A bent positioning groove is milled on the surface of the mounting block 20. After thermally conductive silicone grease is applied into the positioning groove, the two bent adjacent connecting plates 120 are embedded and secured with M2 screws at the four corners to achieve full-area fit.

[0062] Specifically, the visible light camera unit 104 and the infrared camera unit 103 are respectively disposed on two different sub-circuit boards 110 at the bend of the connecting plate 120. During the use of the visible light camera unit 104 and the infrared camera unit 103, the visible light camera unit 104 and the infrared camera unit 103 can be located at the same height to monitor areas at different angles.

[0063] Specifically, during the use of the visible light camera unit 104 and the infrared camera unit 103, the visible light camera unit 104 can be located at the top and the infrared camera unit 103 at the bottom, or the visible light camera unit 104 can be located at the bottom and the infrared camera unit 103 at the top. The top camera unit can face and be used to recognize a face, and the bottom camera unit can face the door lock handle and recognize whether the handle is being held by a hand.

[0064] Please see Figure 1 , Figure 3 and Figure 4 In one embodiment of this utility model, the face recognition module may further include a fixing plate 40 and a drive motor 30.

[0065] Specifically, the drive motor 30 is connected to the fixed plate 40, and the output shaft of the drive motor 30 passes through the connecting mounting block 20. The axial direction of the output shaft of the drive motor 30 is perpendicular to the optical axis direction of both the visible light imaging unit 104 and the infrared imaging unit 103. The main control unit 101 is electrically connected to the drive motor 30.

[0066] Specifically, such as Figure 5 , Figure 6As shown in the description above, the visible light camera unit 104 and the infrared camera unit 103 can be located at the same height, or they can be located at a higher and lower position, respectively. When the drive motor 30 rotates, it can drive the visible light camera unit 104 and the infrared camera unit 103 to rotate, thereby enabling the visible light camera unit 104 and the infrared camera unit 103 to monitor different areas.

[0067] Please refer to 7. Figure 8 and Figure 9 In one embodiment of this utility model, a door lock is proposed. The door lock may include a housing 50, on which a face recognition module is provided. The optical axis direction of the visible light camera unit 104 and the optical axis direction of the infrared camera unit 103 in the face recognition module may be directed toward the outside of the housing 50.

[0068] like Figure 8 and Figure 9 As shown, the door lock also includes a handle 60, which is connected to the housing 50. The extension direction of the handle 60 is perpendicular to the extension direction of the housing 50. To unlock the door, the handle 60 is rotated downwards.

[0069] Specifically, the visible light camera unit 104 and the infrared camera unit 103 are arranged sequentially along the extending direction of the housing 50. The optical axis of the visible light camera unit 104 faces the handle 60, while the optical axis of the infrared camera unit 103 is away from the handle 60. Alternatively, the optical axis of the infrared camera unit 103 faces the handle 60, while the optical axis of the visible light camera unit 104 is away from the handle 60.

[0070] Specifically, the housing 50 can be a cuboid structure formed by extrusion of aluminum alloy, with its extension direction defined as parallel to the long side of the door surface. The handle 60 can be forged from 304 stainless steel and can be hinged to the middle of the housing 50, with its extension direction defined as perpendicular to the long side of the door surface. To unlock the door, the handle 60 can be pressed down, and the handle 60 can be rotated by an angle of 30° to 70° to unlock.

[0071] Please refer to 7. Figure 8 and Figure 9 In one embodiment of this utility model, the rotation shaft of the drive motor 30 in the face recognition module is perpendicular to the side wall of the housing 50, and the rotation angle of the visible light camera unit 104 and the infrared camera unit 103 is 0° to 60°.

[0072] For example, a visible light camera unit 104 is arranged at the lower part of the housing 50, with its optical axis tilted at a 15° angle towards the center of the rotation trajectory of the handle 60, covering the facial area of ​​a user standing at a height of 1.2m-1.8m. An infrared camera unit 104 can be arranged at the upper part of the housing 50, with its optical axis tilted at a 10° angle away from the extension direction of the handle 50, monitoring ground activities within a 3m depth range of the porch.

[0073] Specifically, when only one of the visible light camera unit 104 and the infrared camera unit 103 is in operation, the drive motor 30 can first drive the camera unit to rotate upwards, so that the optical axis of the camera unit monitors at an elevation angle to monitor ground activities within a 3m depth range of the porch. Then, when a person approaches the door lock, the drive motor 30 drives the camera unit to rotate downwards, so that the optical axis of the camera unit monitors at a depression angle and detects the handle 60 to determine whether the handle 60 is being gripped. When the handle 60 is being gripped, the main control unit 101 can control the opening of the door lock.

[0074] In summary, this utility model proposes a face recognition module and door lock. By sharing the printed circuit board, power supply, and image processing unit between the visible light camera unit and the infrared camera unit, the hardware cost is reduced. The main control unit can select to control the visible light camera unit to work alone, the infrared camera unit to work alone, or both the visible light camera unit and the infrared camera unit to work simultaneously, and can perform simultaneous scheduling control to monitor different areas.

[0075] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A face recognition module, characterized in that, include: Mounting block; A printed circuit board, connected to the mounting block, the printed circuit board comprising: At least two sub-circuit boards; The mounting plate includes at least two connecting plates, with adjacent connecting plates connected to form an included angle, and at least one sub-circuit board is provided on one of the connecting plates; The visible light camera unit is connected to a sub-circuit board; The infrared camera unit is connected to another sub-circuit board; An image processing unit is connected to a sub-circuit board, and the image processing unit is electrically connected to the visible light camera unit and the infrared camera unit respectively; The main control unit is connected to a sub-circuit board and is electrically connected to the image processing unit.

2. The face recognition module according to claim 1, characterized in that, The face recognition module also includes: A power module is connected to a sub-circuit board, and the power module is electrically connected to the main control unit; A voice processing unit is connected to a sub-circuit board and is electrically connected to the main control unit.

3. The face recognition module according to claim 1, characterized in that, The two adjacent connecting plates are fixedly or rotatably connected and are attached to the surface of the mounting block. The visible light camera unit and the infrared camera unit are respectively disposed on two different sub-circuit boards corresponding to the two adjacent connecting plates.

4. The face recognition module according to claim 1, characterized in that, The angle between the optical axis of the visible light camera unit and the optical axis of the infrared camera unit is between 30° and 90°.

5. The face recognition module according to claim 1, characterized in that, The face recognition module also includes: Fixing plate; A drive motor is connected to the fixed plate, and the output shaft of the drive motor passes through and is connected to the mounting block; the axial direction of the output shaft of the drive motor is perpendicular to the optical axis direction of both the visible light camera unit and the infrared camera unit.

6. The face recognition module according to claim 5, characterized in that, The main control unit is electrically connected to the drive motor.

7. A door lock, characterized in that, include: case; The face recognition module according to any one of claims 1 to 6, wherein the face recognition module is disposed on the housing; The optical axis of the visible light camera unit and the optical axis of the infrared camera unit are oriented towards the outside of the housing.

8. The door lock according to claim 7, characterized in that, The door lock also includes: A handle is attached to the housing, and the extension direction of the handle is perpendicular to the extension direction of the housing; The visible light camera unit and the infrared camera unit are arranged sequentially along the extension direction of the housing.

9. The door lock according to claim 8, characterized in that, The optical axis of the visible light camera unit is oriented toward the handle, while the optical axis of the infrared camera unit is oriented away from the handle. Alternatively, the optical axis of the infrared camera unit is oriented toward the handle, while the optical axis of the visible light camera unit is oriented away from the handle.

10. The door lock according to claim 9, characterized in that, The rotation shaft of the drive motor in the face recognition module is perpendicular to the side wall of the housing, and the rotation angle of the visible light camera unit and the infrared camera unit is 0° to 60°.

Images