Examination room monitoring equipment based on face recognition

Abstract

The invention relates to the technical field of monitoring equipment, and discloses examination room monitoring equipment based on face recognition, which comprises a camera, a support seat is arranged at the bottom of the camera, a supporting plate is rotatably mounted on the support seat, a limiting plate is arranged on the front side of the support seat, an adjusting assembly for adjusting the position of the limiting plate is arranged outside the limiting plate, and a face recognition module is arranged at the bottom of the camera. The adjusting assembly comprises a first rubber pad, a conveying belt, a guide roller, a support, a sliding block and a positioning assembly used for positioning the sliding block. According to the device, the position of the limiting plate can be conveniently adjusted, so that the limiting plate cannot shield an upper picture display area of the display screen, and the situation that examination answering is affected is avoided; and through the arranged limiting assembly, the situation that the limiting plate is excessively adjusted to be separated from the display screen frame in the whole process is avoided, and the situation that equipment is separated and broken is avoided.

Description

Technical Field

[0001] This invention belongs to the field of monitoring equipment technology, and specifically relates to an examination room monitoring device based on facial recognition. Background Technology

[0002] Surveillance equipment mainly refers to cameras, which are also known as computer cameras, computer eyes, electronic eyes, etc. They are video input devices that are widely used in video conferencing, telemedicine and real-time monitoring.

[0003] In the examination room, cameras based on facial recognition will be set up for capture and monitoring. When the existing surveillance cameras are used, they are mounted on the display screen via a tripod. However, the height of the limiting plate located in front of the tripod and in contact with the front side of the display screen is fixed. This can cause the limiting plate to block the display screen area, which affects the candidates' ability to read the questions.

[0004] Therefore, it is necessary to invent an examination room monitoring device based on facial recognition to solve the above problems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a face recognition-based examination room monitoring device to solve the issues raised in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an examination room monitoring device based on face recognition, comprising: a camera, a support at the bottom of the camera, a support plate rotatably mounted on the support, a limiting plate on the front side of the support, and an adjustment component for adjusting the position of the limiting plate. The adjustment assembly includes: a first rubber pad, a conveyor belt, a guide roller, a bracket, a slider, and a positioning assembly for positioning the slider; The brackets are symmetrically fixedly installed outside the limiting plate. The guide rollers are symmetrically rotated and installed between a pair of brackets. The conveyor belt is sleeved outside the pair of guide rollers. The first rubber pad is sleeved outside the conveyor belt. The slider is symmetrically fixedly installed outside the limiting plate. The support has a groove that cooperates with the slider. The slider is slidably installed in the corresponding groove.

[0007] Furthermore, the positioning component includes: a rectangular rod, a second rubber pad, a pull plate, a side plate, a fixing frame, and a first spring; The rectangular rod is slidably mounted on the slider. The second rubber pad is disposed at one end of the rectangular rod near the inner wall of the slide groove, and the second rubber pad abuts against the inner wall of the slide groove. The pull plate is fixedly mounted at the other end of the rectangular rod. The side plate is symmetrically connected to the pull plate on the side near the limiting plate. The fixing frame is fixedly mounted on the outside of the slider. The first spring is disposed between the fixing frame and the pull plate, and the two ends of the first spring are fixedly connected to the fixing frame and the pull plate, respectively.

[0008] Furthermore, the bracket is equipped with a limiting component that can prevent the limiting plate from being over-adjusted during the adjustment of the limiting plate; The limiting components include: a rotating wheel, a mounting bracket, a telescopic connector, and a rotating assembly for driving the telescopic connector to rotate; The rotating wheel is rotatably mounted on the mounting frame, which is connected to the telescopic connector, which is rotatably mounted inside the bracket.

[0009] Furthermore, the telescopic connector includes: a rectangular column, a sliding sleeve, and a second spring; The rectangular column is L-shaped. The sliding sleeve is slidably fitted on the outside of the rectangular column. The second spring is located inside the sliding sleeve. The second spring connects one end of the rectangular column to the inner wall of the sliding sleeve. A connecting shaft is fixedly installed at the end of the rectangular column away from the sliding sleeve. The connecting shaft is rotatably installed inside the bracket. The mounting bracket is fixedly installed at the end of the sliding sleeve away from the connecting shaft. The rotating component is connected to the connecting shaft.

[0010] Furthermore, the diameter of the rotating wheel is consistent with the height of the end of the sliding sleeve, and when the sliding sleeve rotates to the lower position, the top surface of the sliding sleeve is flush with the bottom of the limiting plate.

[0011] Furthermore, the rotating assembly includes: a motor, a sprocket, a chain belt, and a switch; The motor is fixedly installed on the outside of the bracket. The sprockets are fixedly installed on one end of the motor's output shaft and one end of the connecting shaft, respectively. The chain is sleeved on the outside of the two sprockets. The switch is located on the inside of the fixed frame. The switch is a push-button switch, and one end of the switch abuts against the pull plate.

[0012] Furthermore, the elastic force of the first spring is sufficient to keep the second rubber pad on the rectangular rod in contact with the inner wall of the groove, and the limiting plate can be kept stationary by the friction between the second rubber pad and the inner wall of the groove.

[0013] Furthermore, the conveyor belt is specifically configured as a steel conveyor belt, the shape of the first rubber pad matches the conveyor belt, and the first rubber pad and the conveyor belt are fixedly connected.

[0014] Furthermore, the side plate and the pull plate are fixedly connected, and the pair of side plates are distributed vertically.

[0015] Furthermore, the motor is a motor with an output shaft self-locking function.

[0016] The technical effects and advantages of this invention are as follows: 1. This invention facilitates the adjustment of the position of the limiting plate, ensuring that the limiting plate does not obstruct the upper display area of ​​the screen, thus avoiding interference with the examination and answering of questions; 2. During the adjustment of the limiting plate, the present invention uses a limiting component to prevent the limiting plate from being over-adjusted and detached from the display screen frame, thus avoiding the possibility of the device falling and being damaged. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of an examination room monitoring device based on face recognition according to an embodiment of the present invention is shown; Figure 2 An embodiment of the present invention is shown. Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 A schematic diagram of a portion of the structure of an embodiment of the present invention is shown. Figure 1 ; Figure 4 An embodiment of the present invention is shown. Figure 3 Enlarged structural diagram at point B; Figure 5 A schematic diagram of a portion of the structure of an embodiment of the present invention is shown. Figure 2 ; Figure 6 A schematic diagram of the structure of the limiting component according to an embodiment of the present invention is shown; In the diagram: 1. Camera; 2. Support; 3. Support plate; 4. Limiting plate; 5. First rubber pad; 6. Conveyor belt; 7. Guide roller; 8. Bracket; 9. Slider; 10. Rectangular rod; 11. Second rubber pad; 12. Pull plate; 13. Side plate; 14. Fixing frame; 15. First spring; 16. Rectangular column; 17. Sliding sleeve; 18. Rotary wheel; 19. Second spring; 20. Motor; 21. Sprocket; 22. Chain belt; 23. Switch. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0019] This invention provides an examination room monitoring device based on facial recognition, such as... Figures 1 to 6 As shown, it includes: a camera 1, a support 2 at the bottom of the camera 1, a support plate 3 rotatably mounted on the support 2, a limiting plate 4 on the front side of the support 2, and an adjustment component for adjusting the position of the limiting plate 4 on its outside. The adjustment assembly includes: a first rubber pad 5, a conveyor belt 6, a guide roller 7, a bracket 8, a slider 9, and a positioning assembly for positioning the slider 9; The brackets 8 are symmetrically fixedly installed on the outside of the limiting plate 4. The guide rollers 7 are symmetrically rotated and installed between a pair of brackets 8. The conveyor belt 6 is sleeved on the outside of a pair of guide rollers 7. The first rubber pad 5 is sleeved on the outside of the conveyor belt 6. The slider 9 is symmetrically fixedly installed on the outside of the limiting plate 4. The support 2 has a groove that cooperates with the slider 9. The slider 9 is slidably installed in the corresponding groove.

[0020] In use, place the entire device on the computer screen, with the bottom of the support 2 against the top of the screen, the support plate 3 against the back of the screen, and the first rubber pad 5 on the inner side of the limiting plate 4 against the front of the screen. Then, release the positioning component from positioning the slider 9 and pull the slider 9 to raise the limiting plate 4, support 8, guide roller 7, conveyor belt 6, and first rubber pad 5. This allows the position of the limiting plate 4 to be adjusted. During the adjustment of the limiting plate 4, the first rubber pad 5 is subjected to the friction of the screen, causing the conveyor belt 6 and guide roller 7 to rotate and the first rubber pad 5 to roll along the surface of the screen. The rolling of the first rubber pad 5 makes the adjustment of the limiting plate 4 easier. Adjust until the bottom of the limiting plate 4 is flush with the bottom of the top edge of the screen. Position the slider 9 using the positioning component to complete the positioning of the limiting plate 4. At this point, the position of the limiting plate 4 is adjusted so that it does not obstruct the upper display area of ​​the screen, thus avoiding interference with the exam.

[0021] like Figures 2 to 4 As shown, the positioning assembly includes: a rectangular rod 10, a second rubber pad 11, a pull plate 12, a side plate 13, a fixing bracket 14, and a first spring 15; A rectangular rod 10 is slidably mounted on a slider 9. A second rubber pad 11 is located at one end of the rectangular rod 10 near the inner wall of the slide groove, and the second rubber pad 11 abuts against the inner wall of the slide groove. A pull plate 12 is fixedly mounted on the other end of the rectangular rod 10. A side plate 13 is symmetrically connected to the pull plate 12 on the side near the limiting plate 4. A fixing frame 14 is fixedly mounted on the outside of the slider 9. A first spring 15 is located between the fixing frame 14 and the pull plate 12, and the two ends of the first spring 15 are fixedly connected to the fixing frame 14 and the pull plate 12, respectively.

[0022] The pressure provided by the first spring 15 to the pull plate 12, the rectangular rod 10, and the second rubber pad 11 allows the second rubber pad 11 to come into contact with the inner wall of the slide groove. Relying on the friction between the second rubber pad 11 and the inner wall of the slide groove, the position of the slider 9 can be positioned. Insert your fingers into the inside of the pull plates 12 on both sides and pull the pull plates 12 to move them away from the slide groove, causing the second rubber pad 11 to leave the slide groove. Separate the second rubber pads 11 on both sides from the inner wall of the slide groove. At this time, the positioning of the slider 9 is canceled, and the slider 9 can slide freely along the slide groove.

[0023] like Figure 2 and Figure 6 As shown, the bracket 8 is equipped with a limiting component that can prevent the limiting plate 4 from being over-adjusted during the adjustment of the limiting plate 4; The limiting components include: a rotating wheel 18, a mounting bracket, a telescopic connector, and a rotating assembly for driving the telescopic connector to rotate; The rotating wheel 18 is rotatably mounted on the mounting bracket, which is connected to the telescopic connector, which is rotatably mounted inside the bracket 8.

[0024] Because some computer monitors may tilt backward, the entire device will tilt backward, causing the limiting plate 4 to come into greater contact with the monitor. When adjusting the position of the limiting plate 4, if the upper bezel of the monitor is narrow, the limiting plate 4 may easily detach from the monitor bezel during the actual adjustment. If the detachment is not noticed and the pull plate 12 is released, the entire device will slide backward and detach from the monitor under the influence of gravity, causing the device to fall and break. Therefore, while pulling the pull plate 12, the rotating component drives the telescopic connector to rotate along with the mounting bracket and the rotating wheel 18, causing the rotating wheel 18 to rotate until it contacts the display area of ​​the screen. Then, when adjusting the position of the limiting plate 4, the rotating wheel 18 or the telescopic connector contacts the bottom of the upper frame of the screen. At this time, it can remind the operator that the adjustment is complete. The operator releases the pull plate 12, and the compressed first spring 15 drives the pull plate 12, the rectangular rod 10, and the second rubber pad 11 to reset, causing the second rubber pad 11 to contact the inner wall of the slide groove, completing the positioning of the slider 9, thereby completing the positioning of the limiting plate 4. At this time, the rotating component drives the telescopic connector to reset along with the mounting bracket and the rotating wheel 18, causing it to leave the screen. Thus, the adjustment of the limiting plate 4 is completed. During the whole process, there will be no over-adjustment of the limiting plate 4, causing it to detach from the screen frame, thus avoiding the situation where the equipment detaches and is damaged.

[0025] like Figure 6 As shown, the telescopic connector includes: a rectangular post 16, a sliding sleeve 17, and a second spring 19; The rectangular column 16 is L-shaped. The sliding sleeve 17 is slidably sleeved on the outside of the rectangular column 16. The second spring 19 is located inside the sliding sleeve 17. The second spring 19 fixes one end of the rectangular column 16 to the inner wall of the sliding sleeve 17. A connecting shaft is fixedly installed at the end of the rectangular column 16 away from the sliding sleeve 17. The connecting shaft is rotatably installed inside the bracket 8. The mounting bracket is fixedly installed at the end of the sliding sleeve 17 away from the connecting shaft. The rotating component is connected to the connecting shaft. The diameter of the rotating wheel 18 is the same as the height of the end of the sliding sleeve 17. When the sliding sleeve 17 rotates to the bottom, the top surface of the sliding sleeve 17 is flush with the bottom of the limiting plate 4.

[0026] The rotating assembly drives the connecting shaft, causing the rectangular column 16, sliding sleeve 17, mounting bracket, and rotating wheel 18 to rotate. The rotating wheel 18 rotates until it contacts the surface of the display screen. The presence of the second spring 19 allows the sliding sleeve 17 to extend and retract adaptively, thus adapting to display screens of different depths. This ensures that the rotating wheel 18 contacts the display area of ​​the screen. When the rotating wheel 18 contacts the display screen, the top of the sliding sleeve 17 is parallel to the bottom of the upper frame of the display screen. As the limiting plate 4 moves, the bracket 8 moves, which in turn causes the connecting shaft, rectangular column 16, sliding sleeve 17, mounting bracket, and rotating wheel 18 to move accordingly. If the display area of ​​the screen is recessed deeply, the sliding sleeve 17 will contact the bottom of the upper frame of the display screen. If the recess is not deep, the rotating wheel 18 will contact the bottom of the upper frame of the display screen. This indicates to the operator that the adjustment of the limiting plate 4 is complete.

[0027] like Figure 2 As shown, the rotating assembly includes: a motor 20, a sprocket 21, a chain belt 22, and a switch 23; The motor 20 is fixedly installed on the outside of the bracket 8. The sprockets 21 are fixedly installed on one end of the output shaft and one end of the connecting shaft of the motor 20 respectively. The chain belt 22 is sleeved on the outside of the two sprockets 21. The switch 23 is located on the inside of the fixed frame 14. The switch 23 is a push switch. One end of the switch 23 abuts against the pull plate 12.

[0028] Pulling the pull plate 12 causes the switch 23 to be pressed. The switch 23 controls the motor 20 to start, causing the connected sprocket 21 to rotate. This, in turn, causes the other sprocket 21 to rotate via the chain belt 22, which in turn causes the connecting shaft, rectangular column 16, sliding sleeve 17, mounting bracket, and rotating wheel 18 to rotate. After the pull plate 12 is reset, the pressure on the switch 23 is released. At this time, the output shaft of the motor 20 is reset, which resets the rotating wheel 18, causing it to move away from the display screen.

[0029] like Figure 4 As shown, the elastic force of the first spring 15 is sufficient to keep the second rubber pad 11 on the rectangular rod 10 in contact with the inner wall of the groove, and the limiting plate 4 can be kept stationary by the friction between the second rubber pad 11 and the inner wall of the groove.

[0030] like Figure 5 As shown, the conveyor belt 6 is specifically configured as a steel conveyor belt, the shape of the first rubber pad 5 matches the conveyor belt 6, and the first rubber pad 5 and the conveyor belt 6 are fixedly connected.

[0031] like Figure 4 As shown, the side plate 13 is fixedly connected to the pull plate 12, and the pair of side plates 13 are distributed vertically.

[0032] After inserting a finger into the inside of the pull plate 12, pull the pull plate 12 to make it move the rectangular rod 10 and the second rubber pad 11 away from the inner wall of the slide groove. Then, with the side plate 13 pressing against the pull plate 12, the rectangular rod 10, the slider 9 and the limiting plate 4 are raised for adjustment.

[0033] like Figure 6 As shown, motor 20 is a motor with output shaft self-locking function.

[0034] When the motor 20 stops rotating, its output shaft can be locked, so that the sliding sleeve 17 and the rotating wheel 18 can remain in their positions.

[0035] Working Principle: During use, the entire device is placed on the computer screen. The bottom of the support 2 is flush with the top of the screen, the support plate 3 is in contact with the back of the screen, and the first rubber pad 5 inside the limiting plate 4 is in contact with the front of the screen. The pressure provided by the first spring 15 against the pull plate 12, the rectangular rod 10, and the second rubber pad 11 allows the second rubber pad 11 to contact the inner wall of the slide groove. The friction between the second rubber pad 11 and the inner wall of the slide groove positions the slider 9. Inserting fingers into the inside of the pull plates 12 on both sides and pulling them causes the pull plates 12 to move away from the slide groove, carrying the rectangular rod 10 and the second rubber pad 11. This causes the second rubber pad 11 to leave the slide groove, separating both second rubber pads 11 from the inner wall of the slide groove. During this process, the pull plates 12 compress the first spring 15, causing it to deform. At this point, the positioning of the slider 9 is released, and the slider 9 can slide freely along the slide groove. The side plate 13, against the pull plate 12, moves the rectangular rod 10... Slider 9 and limit plate 4 rise for adjustment, thereby raising bracket 8, guide roller 7, conveyor belt 6, and first rubber pad 5. During the adjustment of limit plate 4, the first rubber pad 5 is subjected to the friction of the display screen, causing the conveyor belt 6 and guide roller 7 to rotate, and the first rubber pad 5 to roll along the surface of the display screen. The rolling of the first rubber pad 5 makes the adjustment of limit plate 4 easier. Adjust until the bottom of limit plate 4 is flush with the bottom of the upper frame of the display screen. Release pull plate 12, and the first spring 15, along with pull plate 12, rectangular rod 10, and second rubber pad 11, returns to its original position, causing the second rubber pad 11 to contact the inner wall of the slide groove. Relying on the friction between the second rubber pad 11 and the inner wall of the slide groove, the position of slider 9 can be positioned, thereby completing the positioning of limit plate 4. At this time, the position of limit plate 4 is adjusted so that limit plate 4 will not obstruct the upper display area of ​​the display screen, thus avoiding affecting the examination and answering of questions. Because some computer monitors may tilt backward, the entire device will tilt backward, causing the limiting plate 4 to come into greater contact with the monitor. When adjusting the position of the limiting plate 4, if the upper bezel of the monitor is narrow, the limiting plate 4 may easily detach from the monitor bezel during the actual adjustment. If the detachment is not noticed and the pull plate 12 is released, the entire device will slide backward and detach from the monitor under the influence of gravity, causing the device to fall and break. Therefore, while pulling the pull plate 12, the pull plate 12 presses the switch 23, and the switch 23 controls the motor 20 to start, causing the connected sprocket 21 to rotate. This, in turn, causes the other sprocket 21 to rotate via the chain belt 22, which in turn rotates the connecting shaft, rectangular column 16, sliding sleeve 17, mounting bracket, and rotating wheel 18. The rotating wheel 18 rotates until it contacts the surface of the display screen. The presence of the second spring 19 allows the sliding sleeve 17 to extend and retract adaptively, thus adapting to display screens of different depths and ensuring that the rotating wheel 18 contacts the display area of ​​the screen. When the rotating wheel 18 contacts the display screen, the top of the sliding sleeve 17 is parallel to the bottom of the upper frame of the display screen. With the movement of the limiting plate 4, the bracket 8 moves, causing the connecting shaft, rectangular column 16, sliding sleeve 17, mounting bracket, and rotating wheel 18 to move accordingly. If the display area of ​​the screen is deeply recessed, the sliding sleeve 17 will contact the bottom of the upper frame of the screen. If the recess is not deep, the rotating wheel 18 will contact the bottom of the upper frame of the screen. This indicates to the operator that the adjustment of the limit plate 4 is complete. The operator releases the pull plate 12, and the compressed first spring 15 drives the pull plate 12, the rectangular rod 10, and the second rubber pad 11 to reset, so that the second rubber pad 11 contacts the inner wall of the slide groove, completing the positioning of the slider 9, thereby completing the positioning of the limit plate 4. The switch 23 resets, and the output shaft of the motor 20 resets, realizing the reset of the rotating wheel 18, which moves away from the screen. This completes the adjustment of the limit plate 4. During the whole process, there will be no over-adjustment of the limit plate 4, causing it to detach from the screen frame, thus avoiding the possibility of the equipment falling and being damaged.

[0036] The control principle of switch 23 controlling motor 20 is existing technology and will not be elaborated here.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A face recognition-based examination room monitoring device, characterized in that, include: A camera (1) is provided with a support (2) at the bottom of the camera (1), a support plate (3) is rotatably mounted on the support (2), a limiting plate (4) is provided on the front side of the support (2), and an adjustment component for adjusting its position is provided on the outside of the limiting plate (4). The adjustment assembly includes: a first rubber pad (5), a conveyor belt (6), a guide roller (7), a bracket (8), a slider (9), and a positioning assembly for positioning the slider (9); The brackets (8) are symmetrically fixedly installed outside the limiting plate (4), the guide rollers (7) are symmetrically rotated and installed between a pair of brackets (8), the conveyor belt (6) is sleeved outside the pair of guide rollers (7), the first rubber pad (5) is sleeved outside the conveyor belt (6), the slider (9) is symmetrically fixedly installed outside the limiting plate (4), the support (2) is provided with a groove that cooperates with the slider (9), and the slider (9) is slidably installed in the corresponding groove.

2. The examination room monitoring device based on face recognition according to claim 1, characterized in that: The positioning assembly includes: a rectangular rod (10), a second rubber pad (11), a pull plate (12), a side plate (13), a fixing frame (14), and a first spring (15); The rectangular rod (10) is slidably mounted on the slider (9). The second rubber pad (11) is located at one end of the rectangular rod (10) near the inner wall of the groove. The second rubber pad (11) abuts against the inner wall of the groove. The pull plate (12) is fixedly mounted on the other end of the rectangular rod (10). The side plate (13) is symmetrically connected to the side of the pull plate (12) near the limiting plate (4). The fixing frame (14) is fixedly mounted on the outside of the slider (9). The first spring (15) is located between the fixing frame (14) and the pull plate (12). The two ends of the first spring (15) are fixedly connected to the fixing frame (14) and the pull plate (12) respectively.

3. The examination room monitoring device based on face recognition according to claim 2, characterized in that: The bracket (8) is provided with a limiting component that can prevent the limiting plate (4) from being over-adjusted during the adjustment of the limiting plate (4); The limiting components include: a rotating wheel (18), a mounting bracket, a telescopic connector, and a rotating assembly for driving the telescopic connector to rotate; The rotating wheel (18) is rotatably mounted on the mounting frame, which is connected to the telescopic connector, which is rotatably mounted inside the bracket (8).

4. The examination room monitoring device based on face recognition according to claim 3, characterized in that: The telescopic connector includes: a rectangular column (16), a sliding sleeve (17), and a second spring (19). The rectangular column (16) is L-shaped. The sliding sleeve (17) is slidably sleeved on the outside of the rectangular column (16). The second spring (19) is located inside the sliding sleeve (17). The second spring (19) connects one end of the rectangular column (16) to the inner wall of the sliding sleeve (17). A connecting shaft is fixedly installed at the end of the rectangular column (16) away from the sliding sleeve (17). The connecting shaft is rotatably installed inside the bracket (8). The mounting bracket is fixedly installed at the end of the sliding sleeve (17) away from the connecting shaft. The rotating component is connected to the connecting shaft.

5. The examination room monitoring device based on face recognition according to claim 4, characterized in that: The diameter of the rotating wheel (18) is the same as the height of the end of the sliding sleeve (17). When the sliding sleeve (17) rotates to the bottom, the top surface of the sliding sleeve (17) is flush with the bottom of the limiting plate (4).

6. The examination room monitoring device based on face recognition according to claim 5, characterized in that: The rotating assembly includes: a motor (20), a sprocket (21), a chain belt (22), and a switch (23); The motor (20) is fixedly installed on the outside of the bracket (8). The sprockets (21) are fixedly installed on one end of the output shaft and one end of the connecting shaft of the motor (20). The chain (22) is sleeved on the outside of the two sprockets (21). The switch (23) is set on the inside of the fixed frame (14). The switch (23) is set as a push switch. One end of the switch (23) abuts against the pull plate (12).

7. The examination room monitoring device based on face recognition according to claim 6, characterized in that: The elastic force of the first spring (15) is sufficient to keep the second rubber pad (11) on the rectangular rod (10) in contact with the inner wall of the groove. The limiting plate (4) can be kept stationary by the friction between the second rubber pad (11) and the inner wall of the groove.

8. The examination room monitoring device based on face recognition according to claim 7, characterized in that: The conveyor belt (6) is specifically configured as a steel conveyor belt, the shape of the first rubber pad (5) matches the conveyor belt (6), and the first rubber pad (5) and the conveyor belt (6) are fixedly connected.

9. The examination room monitoring device based on face recognition according to claim 8, characterized in that: The side plate (13) is fixedly connected to the pull plate (12), and the pair of side plates (13) are distributed vertically.

10. The examination room monitoring device based on face recognition according to claim 9, characterized in that: The motor (20) is a motor with output shaft self-locking function.

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