Multi-angle facial expression recognition device

Abstract

The utility model belongs to the technical field of facial expression recognition, and discloses a multi-angle facial expression recognition device which comprises a shell, a rectangular groove is formed in the side face of the shell, a fixing rod is fixedly installed in the shell, a rectangular plate is movably installed on the surface of the fixing rod and extends into the rectangular groove, and the rectangular groove is formed in the side face of the shell. A second motor and an expression recognition camera are fixedly installed on the surface of the rectangular plate in sequence, and a gear is fixedly installed on an output shaft of the second motor. By adjusting the height of the shell, the face of each person can be ensured to be within the optimal recognition range of the recognition device, so that the recognition accuracy is improved, meanwhile, the angle of the expression recognition camera is changed, more facial details and expression changes can be captured, and particularly, the facial details and expression changes can be captured under the condition of side face or head lowering. And effective identification can still be carried out, so that the identification error caused by the angle problem can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of facial expression recognition, and specifically relates to a multi-angle facial expression recognition device. Background Technique

[0002] A facial expression recognition device is a device integrated with advanced technologies and algorithms, aiming to capture, analyze, and recognize an individual's facial expressions. By combining technologies such as computer vision, image processing, machine learning, and deep learning, this device achieves precise recognition of facial expressions.

[0003] Traditional facial expression recognition devices still have some drawbacks in actual use: Traditional facial expression recognition devices are often limited to a static and relatively single perspective in design, that is, mainly capturing expressions by directly aiming a camera at a fixed position at the front of a person's face. However, this design exposes many limitations in actual applications;

[0004] Firstly, since the camera cannot adjust its shooting angle, the device can only obtain a limited front view when capturing facial expressions and cannot obtain expressions from other angles. This results in a smaller range of the face being captured, thus insufficient acquisition of facial expression image information. Secondly, since the height of the device is usually fixed and cannot be flexibly adjusted according to the height of the user, this causes many inconveniences for people of different heights. For people with a shorter height, they may need to use additional tools to increase their height so that the camera can clearly capture their facial expressions. This method not only increases the complexity of use but may also affect the recognition accuracy to a certain extent; for people with a taller height, they need to bend down and lower their heads to match the shooting height of the camera. Maintaining this posture for a long time is not only likely to cause physical fatigue but may also have an adverse impact on lumbar health. Content of the Utility Model

[0005] To solve the problems raised in the above background technique, the utility model provides a multi-angle facial expression recognition device.

[0006] To achieve the above object, the present utility model provides the following technical solution: A multi-angle facial expression recognition device, including a housing, a rectangular groove is provided on the side surface of the housing, a fixed rod is fixedly installed inside the housing, a rectangular plate is movably installed on the surface of the fixed rod and the rectangular plate extends into the rectangular groove, a motor two is fixedly installed on the surface of the rectangular plate in sequence and a facial expression recognition camera is movably installed, an output shaft of the motor two is fixedly installed with a gear, a rack is meshed with the side surface of the gear and the rack is fixedly installed at the bottom end inside the housing, a fixing plate is fixedly installed at the bottom of the rectangular plate, a motor one is fixedly installed on the side surface of the fixing plate, an output shaft of the motor one is fixedly installed with a bevel gear two, a bevel gear one is fixedly installed at the bottom of the facial expression recognition camera, and the facial expression recognition camera is meshed with the bevel gear one, a inner cylinder is fixedly installed at the bottom of the housing, an outer cylinder is arranged on the surface of the inner cylinder, a round hole is provided on the surface of the outer cylinder, a round groove is provided on the surface of the inner cylinder, a button is movably installed inside the round hole, and a spring is arranged between the button and the round groove.

[0007] Preferably, a motor protection cover is arranged on the side surface of the fixing plate and the motor one is located inside the motor protection cover, and heat dissipation holes are provided on the surface of the motor protection cover.

[0008] Preferably, the number of the outer cylinders is two groups, and bases are fixedly installed at the bottoms of the two groups of outer cylinders.

[0009] Preferably, a long rod is fixedly installed at the top of the base, a side plate is fixedly installed on the side surface of the housing, and the long rod penetrates through the side plate.

[0010] Preferably, heat dissipation grooves are provided on both sides of the housing, and the number of the heat dissipation grooves is eight.

[0011] Preferably, the inner diameter value of the rectangular groove is equal to the outer diameter value of the rectangular plate, and a bracket is fixedly installed between the rectangular plate and the motor two.

[0012] Preferably, the outer diameter value of the button is equal to the inner diameter values of the round hole and the round groove, and the whole housing is made of stainless steel.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The utility model presses a button to apply pressure to a spring, then pulls out the inner cylinder and changes the height of the outer shell. Subsequently, the button is released, and the reaction force of the spring resets it to complete the fixation. Then, the power of the second motor makes the gear rotate, and through meshing with the rack, the rectangular plate moves on the surface of the fixed rod. At the same time, the power of the first motor makes the first bevel gear meshing with the second bevel gear rotate, thereby changing the angle of the expression recognition camera. Compared with traditional devices, this device can ensure that everyone's face is within the best recognition range of the recognition device by adjusting the height of the outer shell, thereby improving the recognition accuracy. At the same time, changing the angle of the expression recognition camera can capture more facial details and expression changes. Especially in the case of a side face or looking down, effective recognition can still be carried out, which helps to reduce the recognition error caused by the angle problem. And users can adjust the height and angle of the outer shell according to their own height and habits to obtain a more comfortable and natural recognition experience, which helps to improve user satisfaction and loyalty. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the utility model;

[0016] Figure 2 is a schematic cross-sectional structural diagram of the outer shell of the utility model;

[0017] Figure 3 is an exploded structural diagram of the utility model;

[0018] Figure 4 is the utility model Figure 3 partial enlarged structural diagram at A in;

[0019] Figure 5 is a schematic cross-sectional structural diagram of the outer cylinder of the utility model;

[0020] Figure 6 is the utility model Figure 5 partial enlarged structural diagram at B in.

[0021] In the figure: 1. Outer shell; 2. Rectangular groove; 3. Fixed rod; 4. Rectangular plate; 5. Expression recognition camera; 6. First bevel gear; 7. Fixed plate; 8. Second bevel gear; 9. First motor; 10. Rack; 11. Second motor; 12. Gear; 13. Bracket; 14. Inner cylinder; 15. Outer cylinder; 16. Round hole; 17. Round groove; 18. Button; 19. Spring; 20. Side plate; 21. Long rod; 22. Heat dissipation groove; 23. Motor protection cover; 24. Heat dissipation hole; 25. Base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] As Figures 1 to 6 shown, the present invention provides a multi-angle facial expression recognition device, including a housing 1. A rectangular groove 2 is provided on the side surface of the housing 1. A fixed rod 3 is fixedly installed inside the housing 1. A rectangular plate 4 is movably installed on the surface of the fixed rod 3 and the rectangular plate 4 extends into the rectangular groove 2. A motor two 11 is fixedly installed on the surface of the rectangular plate 4 in sequence and an expression recognition camera 5 is movably installed. An output shaft of the motor two 11 is fixedly installed with a gear 12. A rack 10 is engaged with the side surface of the gear 12 and the rack 10 is fixedly installed at the bottom end inside the housing 1. A fixing plate 7 is fixedly installed at the bottom of the rectangular plate 4. A motor one 9 is fixedly installed on the side surface of the fixing plate 7. An output shaft of the motor one 9 is fixedly installed with a bevel gear two 8. A bevel gear one 6 is fixedly installed at the bottom of the expression recognition camera 5. The expression recognition camera 5 is engaged with the bevel gear one 6. A inner cylinder 14 is fixedly installed at the bottom of the housing 1. An outer cylinder 15 is arranged on the surface of the inner cylinder 14. A round hole 16 is provided on the surface of the outer cylinder 15. A circular groove 17 is provided on the surface of the inner cylinder 14. A button 18 is movably installed inside the round hole 16. A spring 19 is arranged between the button 18 and the circular groove 17;

[0024] By adopting the above solution: by adjusting the height of the housing 1, it can ensure that everyone's face is within the best recognition range of the recognition device, thereby improving the recognition accuracy. At the same time, by changing the angle of the expression recognition camera 5, more facial details and expression changes can be captured. Especially in the case of a side face or looking down, effective recognition can still be carried out, which helps to reduce the recognition error caused by the angle problem. And users can adjust the height and angle of the housing 1 according to their own height and habits to obtain a more comfortable and natural recognition experience, which helps to improve user satisfaction and loyalty.

[0025] As Figure 1 shown, a motor protection cover 23 is arranged on the side surface of the fixing plate 7 and the motor one 9 is located inside the motor protection cover 23. Heat dissipation holes 24 are provided on the surface of the motor protection cover 23. The number of the outer cylinders 15 is two groups. Bases 25 are fixedly installed at the bottoms of the two groups of outer cylinders 15;

[0026] Adopting the above solution: By arranging a motor protection cover 23 on the side of the fixed plate 7 and the first motor 9 being located inside the motor protection cover 23, the first motor 9 is protected from being damaged by collision with external objects. Heat dissipation holes 24 are provided on the surface of the motor protection cover 23 to ensure the heat dissipation of the first motor 9. By arranging two groups of outer cylinders 15 and a base 25 being fixedly installed at the bottom of the two groups of outer cylinders 15, the base 25 can disperse the pressure from above, making the device more stable during use.

[0027] As Figure 1 shown, a long rod 21 is fixedly installed at the top of the base 25, a side plate 20 is fixedly installed on the side of the housing 1, the long rod 21 penetrates through the side plate 20, heat dissipation grooves 22 are provided on both sides of the housing 1, and the number of the heat dissipation grooves 22 is eight;

[0028] Adopting the above solution: By fixedly installing a side plate 20 on the side of the housing 1, fixedly installing a long rod 21 at the top of the base 25 and the long rod 21 penetrating through the side plate 20, the stability during adjusting the overall height of the housing 1 is ensured, and the situation of shaking is avoided. By providing heat dissipation grooves 22 on both sides of the housing 1 and the number of the heat dissipation grooves 22 being eight, the second motor 11 inside the housing 1 can dissipate heat in time, improving the safety.

[0029] As Figure 2 、 Figure 6 shown, the inner diameter value of the rectangular groove 2 is equal to the outer diameter value of the rectangular plate 4. A bracket 13 is fixedly installed between the rectangular plate 4 and the second motor 11. The outer diameter value of the button 18 is equal to the inner diameter values of the round hole 16 and the round groove 17. The whole housing 1 is made of stainless steel;

[0030] Adopting the above solution: By setting the inner diameter value of the rectangular groove 2 equal to the outer diameter value of the rectangular plate 4, the stability of the rectangular plate 4 when moving inside the rectangular groove 2 is improved. A bracket 13 is fixedly installed between the rectangular plate 4 and the second motor 11 to ensure the stability of the second motor 11. By setting the outer diameter value of the button 18 equal to the inner diameter values of the round hole 16 and the round groove 17, it is ensured that the button 18 fits better when moving inside the round hole 16 and the round groove 17. The whole housing 1 is made of stainless steel, and the stainless steel has high strength and good rust prevention performance.

[0031] The working principle and usage process of the present utility model:

[0032] In use, first adjust the height of the outer shell 1 according to the height of the human body, that is, press the button 18 so that the button 18 enters the inside of the circular groove 17 and squeezes the spring 19, then pull the inner cylinder 14 to change the height of the outer shell 1, and then release the button 18, and the reaction force of the spring 19 resets it to complete the fixation. After that, the power of the second motor 11 causes the gear 12 to rotate. Since the gear 12 meshes with the second motor 11, the rectangular plate 4 moves on the surface of the fixed rod 3. At the same time, the power of the first motor 9 causes the second bevel gear 8 to rotate. The rotation of the second bevel gear 8 causes the first bevel gear 6 meshing with it to rotate, thereby changing the angle of the facial expression recognition camera 5. The facial expression recognition camera 5 collects the surface of the person's face. When the person's face is irradiated and scanned by the facial expression recognition camera 5, first, the face classifier installed inside the device is used to determine whether the input image contains a face, and then the multi-scale sliding window technology and non-maximum suppression technology set inside the device are used to determine the specific position of the face. The facial feature points are automatically marked by the trained model;

[0033] And determine whether the operations such as blinking, head rotation, and tongue stretching are performed by a real person to prevent illegal recognition using forged methods such as photos or masks. Use the set algorithm to extract key features from the preprocessed face image: the positions, shapes, and sizes of the facial contour, eyes, nose, mouth, chin, etc. When the features of the face to be recognized reach a certain similarity threshold with the features of a certain known face, the system will determine that the match is successful and label the face to be recognized as the identity of the known face, thus completing the recognition operation; The surface of the face at different angles can be recognized by this device.

[0034] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-angle facial expression recognition device, comprising a housing (1), characterized in that: A rectangular groove (2) is provided on the side of the outer shell (1). A fixed rod (3) is fixedly installed inside the outer shell (1). A rectangular plate (4) is movably installed on the surface of the fixed rod (3) and the rectangular plate (4) extends into the rectangular groove (2). A second motor (11) is fixedly installed on the surface of the rectangular plate (4) in sequence and an expression recognition camera (5) is movably installed. An output shaft of the second motor (11) is fixedly installed with a gear (12). A rack (10) is engaged with the side of the gear (12) and the rack (10) is fixedly installed at the inner bottom end of the outer shell (1). A fixing plate (7) is fixedly installed at the bottom of the rectangular plate (4). A first motor (9) is fixedly installed on the side of the fixing plate (7). An output shaft of the first motor (9) is fixedly installed with a second bevel gear (8). A first bevel gear (6) is fixedly installed at the bottom of the expression recognition camera (5). The expression recognition camera (5) is engaged with the first bevel gear (6). An inner cylinder (14) is fixedly installed at the bottom of the outer shell (1). An outer cylinder (15) is provided on the surface of the inner cylinder (14). A round hole (16) is provided on the surface of the outer cylinder (15). A circular groove (17) is provided on the surface of the inner cylinder (14). A button (18) is movably installed inside the round hole (16). A spring (19) is provided between the button (18) and the circular groove (17).

2. The multi-angle facial expression recognition device according to claim 1, characterized in that: A motor protection cover (23) is provided on the side of the fixing plate (7) and the first motor (9) is located inside the motor protection cover (23). Heat dissipation holes (24) are provided on the surface of the motor protection cover (23).

3. The multi-angle facial expression recognition device according to claim 1, characterized in that: There are two groups of the outer cylinders (15). A base (25) is fixedly installed at the bottom of the two groups of the outer cylinders (15).

4. The multi-angle facial expression recognition device according to claim 3, characterized in that: A long rod (21) is fixedly installed at the top of the base (25). A side plate (20) is fixedly installed on the side of the outer shell (1). The long rod (21) penetrates through the side plate (20).

5. The multi-angle facial expression recognition device according to claim 1, characterized in that: Heat dissipation grooves (22) are provided on both sides of the outer shell (1). The number of the heat dissipation grooves (22) is eight.

6. The multi-angle facial expression recognition device according to claim 1, characterized in that: The inner diameter value of the rectangular groove (2) is equal to the outer diameter value of the rectangular plate (4). A bracket (13) is fixedly installed between the rectangular plate (4) and the second motor (11).

7. The multi-angle facial expression recognition device according to claim 1, wherein: The outer diameter value of the button (18) is equal to the inner diameter values of the round hole (16) and the circular groove (17). The whole outer shell (1) is made of stainless steel.

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