Face recognition device with large rotation range

Abstract

This invention discloses a facial recognition device with a large rotation range, solving the problems of limited rotation angle and inability to rotate in existing facial recognition devices on bank transaction machines. The device includes a camera and a base. A rotating seat is mounted on the base, and a first rotating component with its rotation trajectory located in a first plane is mounted on the rotating seat. A second rotating component with its rotation trajectory located in a second plane is rotatably connected within the first rotating component. The first and second planes are perpendicular. The camera is mounted on the second rotating component. A rotating arm connected to a drive mechanism is mounted on the base, and the rotating arm is movably connected to the second rotating component. This invention increases the camera's rotation range and expands the monitoring coverage. Three-dimensional rotation is achieved through mechanical linkage, eliminating the need for independent control of multiple motors and simplifying the structural complexity.

Description

Technical Field

[0001] This utility model relates to the field of camera technology, and in particular to a face recognition device with a large rotation range. Background Technology

[0002] Facial recognition is a biometric technology that identifies individuals based on their facial features. It uses a camera to capture images or video streams containing faces, automatically detects and tracks faces within the images, and then performs a series of related technical operations on the detected faces, such as face capture, face comparison, facial feature extraction, and liveness detection. This determines whether the facial image matches a face image in a database, thus achieving rapid identity verification and widespread application across numerous fields. Currently, facial recognition devices are also widely used in bank transaction machines, such as ATMs and self-service terminals. However, most facial recognition devices used in current transaction machines are fixed, rarely driven by motors, and the rotation angle of the cameras on existing facial recognition devices is limited, typically ±5°, making it difficult to meet the needs of larger rotation ranges. Furthermore, these devices generally require multiple motors for drive, increasing not only the complexity and cost of the device but also potentially leading to increased energy consumption, maintenance difficulties, and reduced reliability and operational efficiency. For example, patent application number 201010237780.3, entitled "An Omnidirectional Intelligent Electronically Controlled Camera", includes a rotating base and a U-shaped bracket on the base for rotating the camera. Two motors are installed on the U-shaped bracket to control the rotation of the base and the camera, respectively. This has the above-mentioned disadvantages, requiring multiple motors to drive the camera, which increases the complexity and cost of the device.

[0003] Innovation labs across various industries focus on the design of smart devices to build smart branches and improve customer experience. Improving the customer facial recognition experience is one of them. In order to recognize faces from a wider range and better angles, adapt to customers of different heights and positions in front of the device, and avoid the trouble of business personnel frequently adjusting the camera, it is necessary to design a rotatable facial recognition device with a large rotation range. Summary of the Invention

[0004] This invention mainly solves the problems of existing facial recognition devices on bank transaction machines being unable to rotate and having limited rotation angles, thus failing to better recognize faces and adapt to customers of different heights. It provides a facial recognition device with a large rotation range.

[0005] This invention also solves the problem that existing facial recognition devices on bank transaction machines rely on multiple motors for control, resulting in complex structures and high costs, and provides a facial recognition device with a large rotation range.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a face recognition device with a large rotation range, including a camera and a base. A rotating seat is provided on the base, and a first rotating component with its rotation trajectory located in a first plane is provided on the rotating seat. A second rotating component with its rotation trajectory located in a second plane is rotatably connected inside the first rotating component. The first plane and the second plane are perpendicular. The camera is provided on the second rotating component. A rotating arm connected to a driving mechanism is provided on the base, and the rotating arm is movably connected to the second rotating component.

[0007] This invention employs a nested connection between a first rotating component and a second rotating component. The rotation trajectory of the first rotating component lies on a first plane, and the rotation trajectory of the second rotating component lies on a second plane. This achieves composite motion of the camera in both horizontal and vertical directions, ultimately forming a 360° circular rotation path. This structure overcomes the limitations of traditional single-axis or dual-axis parallel structures, significantly increasing the camera's rotation range and thus expanding the monitoring coverage. This invention achieves three-dimensional rotation through mechanical linkage. Compared to the planar motion of traditional pan-tilt units, it eliminates the need for independent control of multiple motors, simplifying structural complexity. The first rotating component, the second rotating component, and the rotating base are connected movably, increasing the device's flexibility and adaptability. The rotation trajectory of the second rotating component is specifically its rotation trajectory relative to the first rotating component, and the plane containing this trajectory is perpendicular to the plane containing the second rotating component's rotation trajectory. The rotation trajectory of the first or second rotating component can be understood as the trajectory formed by a point on the first or second rotating component at a position with a large rotation amplitude during rotation.

[0008] As a preferred embodiment of the above solution, the second rotating component includes a connecting shell, and a first rotating shaft is provided on both sides of the connecting shell. The connecting shell is rotatably connected to the first rotating component through the first rotating shaft.

[0009] The second rotating component in this design is a connecting shell, which is a cylindrical or frame structure capable of accommodating objects, preferably a cylindrical structure. A camera is installed inside the connecting shell, with the camera lens located at the front end of the connecting shell. Two first rotating shafts are respectively provided on both sides of the outer wall of the connecting shell, and the two first rotating shafts are located on the same straight line for rotating the connecting shell. The connecting shell is rotatably connected to the first rotating component through the first rotating shafts.

[0010] As a preferred embodiment of the above solution, the first rotating component includes a connecting frame, which is a square frame composed of a first side frame and a second side frame, wherein the opposing first side frame is rotatably connected to the rotating seat.

[0011] The first rotating component in this design is a connecting frame, which is a square frame structure composed of opposing first side frames and opposing second side frames. A rotating groove is provided in the middle of the two first side frames. The first side frames are rotatably connected to the rotating seat through the rotating groove and the rotating shaft on the rotating seat, so that the first rotating component rotates around the rotating seat.

[0012] As a preferred embodiment of the above solution, the connecting shell is rotatably connected to the second side frame opposite to the connecting frame via a first rotating shaft.

[0013] In this design, a rotating groove is provided in the middle of the second side frame opposite to the connecting frame. The first rotating shaft of the connecting shell cooperates with the rotating groove of the second side frame to rotatably connect the connecting shell to the second side frame.

[0014] As a preferred embodiment of the above solution, the rotating seat includes a U-shaped frame composed of two rotating support arms, with a second rotating shaft provided on the support arms, and the rotating seat is rotatably connected to the first frame opposite to the connecting frame through the second rotating shaft.

[0015] In this design, the rotating base is a U-shaped frame, with its bottom fixed to the base. Support arms are formed on both sides of the U-shaped frame, and second rotating shafts are respectively installed on opposite sides of the support arms. Specifically, the first frame of the connecting frame engages with the second rotating shafts via a rotating groove, rotatably connecting the connecting frame to the rotating base. In this rotating structure, the second rotating shaft on the rotating base and the first rotating shaft on the connecting shell are spatially perpendicular, ensuring that the first plane of the connecting shell's rotation trajectory is perpendicular to the second plane of the connecting frame's rotation trajectory. This allows the camera located on the connecting shell to achieve combined horizontal and vertical motion, forming a 360-degree circular rotation path, resulting in a larger rotation range for the camera.

[0016] As a preferred embodiment of the above solution, the rotating arm includes a straight rod and a bent plate connected to the upper end of the straight rod. A fixed rod is provided on the bent plate. The fixed rod is movably connected to the bottom of the connecting shell. The straight rod is rotatably connected to the bottom of the rotating seat and passes through the bottom of the rotating seat to connect with the driving mechanism.

[0017] The specific rotating arm comprises three parts: a straight rod, a bent plate, and a fixed rod. The straight rod is rotatably connected to the bottom of the rotating seat and passes through the rotating seat to connect with the drive mechanism. The bent plate is connected to the top of the straight rod and is set at an angle to the straight rod. The fixed rod is located at the front end of the bent plate. This fixed rod is a shaft with a rotating groove at the bottom of the connecting shell. The fixed rod is movably connected to the rotating groove at the bottom of the connecting shell. The straight rod, bent plate, and fixed rod form a linkage mechanism, converting rotational motion into multi-directional motion of the connecting shell. The straight rod is driven to rotate by the drive mechanism, which in turn drives the bent plate to rotate. The fixed rod on the bent plate drives the connecting shell to rotate. Under the rotation constraints of the connecting frame and the rotating seat, the camera at the front end of the connecting shell moves in both horizontal and vertical directions, forming a 360-degree circular rotation.

[0018] As a preferred embodiment of the above solution, the bending plate is bent and connected to the upper end of the straight rod, and the plane of the bending plate is set at an angle to the top surface of the straight rod, the angle being 90°~180°.

[0019] The bending plate is connected to the upper end of the straight rod and located on one side of the straight rod. The bending plate and the top surface of the straight rod form an angle between 90° and 180°. The angle design further optimizes the power transmission path and avoids mechanical interference.

[0020] As a preferred embodiment of the above solution, the camera is mounted on the head of the connecting shell.

[0021] The camera is mounted on the head of the connecting shell, and rotates as the connecting shell moves in multiple directions.

[0022] As a preferred embodiment of the above solution, a cover is provided on the base, and a circular viewing window is opened at the top of the cover, with the camera located below the center of the viewing window.

[0023] The cover covers the outside of the rotating mechanism, providing shielding and protection. A circular viewing window is provided at the top of the cover. The size of the viewing window is slightly larger than the range of the camera's rotation path, allowing the camera to capture external images through the viewing window.

[0024] As a preferred embodiment of the above solution, the drive mechanism includes a motor and a reduction gear set connected thereto, the reduction gear set including an output shaft, the output shaft being connected to a rotating arm.

[0025] The motor is a servo motor, which uses a servo motor and reduction gears to provide high-precision torque output, ensuring that the camera rotates smoothly and controllably.

[0026] The advantages of this utility model are:

[0027] 1. The structure of the first rotating component, the second rotating component, and the rotating arm is adopted. The rotation trajectories of the first rotating component and the second rotating component are vertically distributed in space, realizing the composite movement of the camera in the horizontal and vertical directions, forming a 360° circular rotation path. This breaks through the limitations of the traditional single-axis or dual-axis parallel structure, significantly increases the rotation range of the camera, and expands the monitoring coverage.

[0028] 2. Three-dimensional rotation is achieved through mechanical linkage. Compared with the planar motion of traditional gimbals, it does not rely on independent control of multiple motors, simplifying the structural complexity.

[0029] 3. The first rotating component, the second rotating component, and the rotating base are connected by a movable connection, which increases the flexibility and adaptability of the device. It eliminates the need for multiple motor drives, reducing structural complexity and cost, decreasing energy consumption, simplifying maintenance, and improving device reliability and operational efficiency.

[0030] 4. The face recognition device has been upgraded with a rotation function, providing a larger rotation range. This allows for better face recognition from a wider range and angle, and it can adapt to customers of different heights and positions in front of the device, avoiding the need for staff to frequently adjust the camera. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model.

[0032] Figure 2 This is a schematic diagram of the rotating mechanism of this utility model.

[0033] 1-Camera 2-Base 3-Rotating mechanism 31-Rotating seat 311-Support arm 312-Second rotating shaft 32-First rotating component 321-First frame 322-Second frame 323-First rotating groove 33-Second rotating component 331-First rotating shaft 34-Rotating arm 341-Straight rod 342-Bending plate 343-Fixed rod 4-Drive mechanism 41-Motor 42-Reduction gear set 5-Cover 51-Viewing window Detailed Implementation

[0034] The technical solution of this utility model will be further described below through embodiments and in conjunction with the accompanying drawings.

[0035] Example:

[0036] This embodiment discloses a face recognition device with a large rotation range, such as... Figure 1As shown, the device includes a camera 1 and a base 2, and a rotating mechanism 3 mounted on the base to rotate the camera. The rotating mechanism includes a rotating seat 31 mounted on the base, a first rotating member 32 rotatably connected to the base with its rotation trajectory within a first plane, and a second rotating member 33 rotatably connected within the first rotating member with its rotation trajectory within a second plane. The first plane and the second plane are perpendicular. The camera is mounted on the second rotating member. A rotating arm 34 connected to a drive mechanism is mounted on the base, and the rotating arm is movably connected to the second rotating member.

[0037] As a preferred embodiment of this invention, such as Figure 2 As shown, the second rotating component 33 includes a connecting shell, which is cylindrical. The camera is mounted in the middle of the head of the connecting shell, outside the lens of the camera 1, and its orientation is consistent with the axis of the connecting shell. Two first rotating shafts 331 are respectively provided on both sides of the outer wall of the connecting shell, and the two first rotating shafts are arranged opposite each other on the same straight line. The second rotating component is rotatably connected to the first rotating component 32 through the first rotating shafts.

[0038] In a preferred embodiment, the first rotating member 32 includes a connecting frame, which is a square frame formed by two pairs of opposing first sidewalls 321 and second sidewalls 322. A first rotating groove 323 is provided in the middle of each of the two first sidewalls 321. The first rotating groove of the first sidewall engages with a connector on the rotating seat 31 to rotatably connect the first rotating member 32 to the rotating seat. A second rotating groove (not shown in the figure) is provided in the middle of each of the two second sidewalls 322. The first rotating shaft 331 of the connecting shell 33 engages with the second rotating groove to rotatably connect the connecting shell within the connecting frame 32.

[0039] As a preferred embodiment, the rotating seat 31 is a U-shaped frame. The rotating seat includes a bottom and support arms 311 that are vertically arranged on both sides of the bottom. The bottom of the rotating seat is fixed on the base 31. A second rotating shaft 312 is respectively provided on the inner side of the upper end of the two support arms. Specifically, the second rotating shaft cooperates with the first rotating groove 323 on the first frame 321 of the connecting frame to rotatably connect the rotating seat 31 to the connecting frame.

[0040] The first rotating component 32 and the second rotating component 33 of the rotating mechanism are configured such that the first plane containing the rotation trajectory of the first rotating component is perpendicular to the second plane containing the rotation trajectory of the second rotating component. The rotation trajectory of the second rotating component is relative to the first rotating component, and can be understood as the trajectory formed by a point on the first or second rotating component at a position with a large rotation amplitude during rotation. The first plane and the second plane are perpendicular, meaning the rotation trajectories of the first and second rotating components are perpendicularly distributed in space. Furthermore, the rotational positional relationship between the first and second rotating components can be determined based on the arrangement of the first rotating shaft 331 and the second rotating shaft 312. Since the first and second rotating shafts are perpendicularly distributed in space, the connecting shell rotates vertically around the first rotating shaft, the connecting frame rotates horizontally around the second rotating shaft, and the camera located on the connecting shell combines horizontal and vertical rotations, forming a circular rotation path covering 360°, thus increasing the camera's rotation range. This embodiment uses a rotating mechanism to create a 360° circular rotation path by combining horizontal and vertical movements of the camera. This structure overcomes the limitations of traditional single-axis or dual-axis parallel structures and significantly expands the monitoring coverage.

[0041] In this embodiment, the rotating arm 34 drives the rotating mechanism 3 to rotate via the driving mechanism 3. The rotating arm 34 includes a straight rod 341 and a bent plate 342. The straight rod 341 is movably connected to the middle of the bottom of the rotating seat 31 and passes through the rotating seat 31 and the base 2 to connect with the driving mechanism 4. The bent plate 342 is connected to one side of the upper end of the straight rod. The bent plate and the straight rod are connected by an active bending connection. The surface of the bent plate and the top surface of the straight rod are set at a certain angle, which ranges from 90° to 180°. A fixed rod 343 is provided at the front end of the bent plate. The fixed rod is a shaft and has a corresponding rotating groove on the bottom of the connecting shell. The fixed rod is movably connected to the rotating groove at the bottom of the connecting shell. The straight rod, the bent plate, and the fixed rod constitute a linkage mechanism, which converts the rotational motion into multi-directional motion of the connecting shell. The straight rod is driven to rotate by a drive mechanism, which in turn drives the bent plate to rotate. The fixed rod on the bent plate drives the connecting shell to rotate. Under the rotation constraints of the connecting frame and the rotating seat, the camera at the front end of the connecting shell moves in both horizontal and vertical directions, forming a 360-degree circular rotation. The angle change between the bent plate 342 and the straight rod 341 matches the camera's rotation path. During the camera's rotation, the angle between the bent plate 342 and the straight rod 341 changes between 90° and 180°, optimizing the power transmission path, avoiding mechanical interference, and ensuring smooth and controllable rotation.

[0042] A cover 5 covers the base, shielding the entire rotating mechanism. A circular viewing window 51 is provided at the top of the cover, with the camera located below the center of the viewing window. The size of the viewing window is slightly larger than the range formed by the maximum rotation path of the camera, allowing the camera to capture external images through the viewing window.

[0043] In a preferred embodiment, the drive mechanism 4 includes a motor 41 and a reduction gear set 42. The motor is a servo motor, and the motor 41 is connected to the reduction gear set 42. The output shaft of the reduction gear set is connected to the straight rod 341 of the rotating arm 34. The motor drives the rotating arm to rotate, and the rotation of the camera is ultimately transmitted through the rotation mechanism. The cooperation between the motor and the reduction gear set provides high-precision torque output, ensuring smooth and controllable camera rotation. This embodiment only requires one motor, which transmits the motor power to the camera through the rotation mechanism to achieve 360° camera rotation. Compared with the planar movement of traditional gimbals, this device does not rely on multiple motors for independent control, simplifying the device complexity, reducing manufacturing costs, improving device reliability and operating efficiency, and also facilitating installation and maintenance.

[0044] This device connects to a bank's trading machine. The motor and camera are connected to the trading machine's system. The system controls the motor to rotate the camera and controls the camera to capture images. The camera then uploads the captured images to the system.

[0045] The device in this embodiment must meet the following requirements during manufacturing and use.

[0046] Orthogonal alignment of the rotating shafts: Ensure that the first and second rotating shafts are strictly spatially perpendicular, which can be achieved through laser calibration or precision fixture assembly.

[0047] Lubrication of moving parts: The contact surfaces of the first and second rotating shafts with the connecting frame and rotating seat should be coated with a wear-resistant lubricant, such as a polytetrafluoroethylene coating, to reduce friction loss.

[0048] Servo motor parameter matching: Select the appropriate motor torque and reduction ratio according to the weight of the camera itself and the required rotation speed to avoid loss of synchronization or overheating due to excessive load.

[0049] Motion trajectory control: By controlling the start, stop and turn of the servo motor, the swing angle of the bending plate is precisely matched with the rotation path of the camera.

[0050] Material selection: Both straight rods and bent plates should be made of high-strength, lightweight materials, such as aluminum alloys or carbon fiber, to balance the load and inertia.

[0051] Fatigue testing: The bent plate needs to be subjected to repeated swing tests, such as 100,000 cycles, to verify its fatigue resistance within the 90°~180° angle range.

[0052] Modular installation: The connecting frame, rotating seat and other components are designed as detachable structures, which facilitates quick replacement of damaged parts and easy maintenance later.

[0053] Anti-loosening design: The fixing rod and the bottom rotating groove of the connecting shell are locked with anti-loosening screws or buckles to prevent loosening caused by long-term vibration.

[0054] Secure the device to the desired position using the base, ensuring the drive mechanism's motor is connected to the power supply and trading equipment system. When adjusting the camera angle, first start the motor. Power is output from the output shaft via a reduction gear set. The rotation of the output shaft drives the connected straight rod, which transmits power through a bending plate and a fixed rod to the connecting shell. This causes the connecting shell to rotate relative to the connecting frame around the first axis. Simultaneously, driven by the drive mechanism, the connecting frame rotates relative to the U-shaped rotating seat around the second axis. Because the first and second axes are spatially perpendicular, the rotation of the connecting shell and the connecting frame works in tandem, allowing the camera to rotate 360° along a circular path, achieving multi-angle coverage. During rotation, the angle between the bending plate and the top surface of the straight rod varies between 90° and 180°, optimizing power transmission, avoiding mechanical interference, and ensuring smooth and controllable rotation. After use, stop the motor, and the camera remains in the last rotated position, awaiting the next adjustment command.

[0055] The advantages of this facial recognition device are:

[0056] By adopting a structure of a first rotating component, a second rotating component, and a rotating arm, the rotation trajectories of the first and second rotating components are vertically distributed in space, realizing the composite movement of the camera in the horizontal and vertical directions, forming a 360° circular rotation path. This breaks through the limitations of traditional single-axis or dual-axis parallel structures, significantly increases the camera's rotation range, and expands the monitoring coverage.

[0057] The three-dimensional rotation is achieved through mechanical linkage, which simplifies the structural complexity compared to the planar motion of traditional gimbals, as it does not rely on independent control of multiple motors.

[0058] The first rotating component, the second rotating component, and the rotating base are connected by a movable connection, which increases the flexibility and adaptability of the device. It eliminates the need for multiple motor drives, reducing structural complexity and cost, decreasing energy consumption, simplifying maintenance, and improving reliability and operational efficiency.

[0059] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0060] Although this document frequently uses terms such as camera, base, rotating mechanism, rotating seat, support arm, second rotating shaft, and first rotating component, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A face recognition device with a large rotation range, characterized in that: The device includes a camera and a base. The base has a rotating seat, and the rotating seat has a first rotating component whose rotation trajectory is located in a first plane. A second rotating component whose rotation trajectory is located in a second plane is rotatably connected to the first rotating component. The first plane and the second plane are perpendicular. The camera is mounted on the second rotating component. The base has a rotating arm connected to a drive mechanism, and the rotating arm is movably connected to the second rotating component.

2. The face recognition device with a large rotation range according to claim 1, characterized in that: The second rotating component includes a connecting shell, and a first rotating shaft is provided on both sides of the connecting shell. The connecting shell is rotatably connected to the first rotating component through the first rotating shaft.

3. A face recognition device with a large rotation range according to claim 2, characterized in that: The first rotating component includes a connecting frame, which is a square frame composed of a first side frame and a second side frame, wherein the opposing first side frame is rotatably connected to the rotating seat.

4. A face recognition device with a large rotation range according to claim 3, characterized in that: The connecting shell is rotatably connected to the second side frame opposite to the connecting frame via a first rotating shaft.

5. A face recognition device with a large rotation range according to claim 3 or 4, characterized in that: The rotating seat includes a U-shaped frame composed of two rotating support arms. A second rotating shaft is provided on the support arms. The rotating seat is rotatably connected to the first frame opposite to the connecting frame through the second rotating shaft.

6. A face recognition device with a large rotation range according to claim 2, 3, or 4, characterized in that: The rotating arm includes a straight rod and a bent plate connected to the upper end of the straight rod. A fixed rod is provided on the bent plate. The fixed rod is movably connected to the bottom of the connecting shell. The straight rod is rotatably connected to the bottom of the rotating seat and passes through the bottom of the rotating seat to connect with the drive mechanism.

7. A face recognition device with a large rotation range according to claim 6, characterized in that: The bending plate is bent and connected to the upper end of the straight rod. The plane of the bending plate is set at an angle to the top surface of the straight rod, which is 90°~180°.

8. A face recognition device with a large rotation range according to claim 1, 2, 3, or 4, characterized in that: The camera is mounted on the head of the connecting shell.

9. A face recognition device with a large rotation range according to claim 8, characterized in that: A cover is provided on the base, and a circular viewing window is opened at the top of the cover, with the camera located below the center of the viewing window.

10. A face recognition device with a large rotation range according to claim 7, characterized in that: The drive mechanism includes a motor and a reduction gear set connected thereto. The reduction gear set includes an output shaft, which is connected to a rotating arm.

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