An omni-directional monitoring online examination system based on face recognition

Abstract

The present invention relates to an all-round monitoring online examination system based on face recognition, including a safety helmet main body. The outer wall of the safety helmet main body is connected with a brim flat plate, and a monitoring unit is arranged on the brim flat plate. A carbon steel cantilever is connected to the side wall of the safety helmet main body, and a sound pickup microphone is connected to the end of the carbon steel cantilever far away from the safety helmet main body. Two restraint straps are symmetrically connected to the safety helmet main body, and a box body is also connected to the top of the brim flat plate. A storage battery is arranged inside the battery box, and a signal transmitter and a single-chip microcomputer are respectively arranged on the circuit board. When blasting practical examinees use this monitoring system for practical examinations, this monitoring system can protect the monitoring cameras used for online monitoring, thus effectively preventing the flying solid particles generated during the blasting practice from hitting and damaging the lenses of the monitoring cameras, so that the picture quality of the online monitoring is not affected, and ensuring the normal progress of the blasting practical examination.

Description

Technical Field

[0001] The present invention relates to the technical field of monitoring devices, and particularly to an all-round monitoring online examination system based on face recognition. Background Art

[0002] Special operation personnel refer to those directly engaged in special types of operations. According to relevant documents of the State Administration of Work Safety Supervision and Management, special operations refer to operations that are prone to cause personal injury and death accidents and may pose significant hazards to the safety of the operator himself, others, and surrounding facilities. Special operation personnel need to possess necessary safety technical knowledge and skills. After undergoing safety technical training, special operation personnel must take an assessment, and the assessment content includes theoretical examinations and practical operation examinations. Only those who pass both examinations can obtain an operation certificate and are allowed to work independently. Blasting operation is an important part of special operations, including surface engineering blasting and underground blasting workers. With the continuous progress of science and technology, currently, the method of installing a camera on the safety helmet worn by practical operators to conduct all-round online monitoring of practical operators has gradually become popular. This method can effectively prevent cheating by blasting practical examination candidates during the practical operation process and is also conducive to improving the assessment efficiency.

[0003] However, in the prior art, the protection effect of the monitoring system on the camera used for monitoring is poor. As a result, when candidates take the blasting practical examination, the flying solid particles generated during the blasting process are likely to hit the lens of the camera, causing the lens of the camera to be damaged by the flying particles, affecting the monitoring image quality of the monitoring system. It is difficult for the invigilator to clearly see the practical examination site, which not only gives candidates the opportunity to cheat but also makes it difficult for the invigilator to judge the practical operation results of candidates through the monitoring screen, seriously affecting the normal progress of the blasting operation practical examination. Therefore, we propose an all-round monitoring online examination system based on face recognition. Summary of the Invention

[0004] 1. Technical problems to be solved:

[0005] When blasting practical examination candidates use this monitoring system to take the practical examination, this monitoring system can protect the monitoring camera used for online monitoring, effectively preventing the flying solid particles generated during the blasting practical operation from hitting and damaging the lens of the monitoring camera, so that the image quality of the online monitoring screen is not affected, and ensuring the normal progress of the blasting practical examination.

[0006] 2. Technical solutions:

[0007] The solution of the present invention to the above technical problems is as follows: An all-round monitoring online examination system based on face recognition, including a safety helmet main body, a brim flat plate is connected to the outer wall of the safety helmet main body, a monitoring unit is provided on the brim flat plate, a carbon steel cantilever is connected to the side wall of the safety helmet main body, a sound pickup microphone is connected to one end of the carbon steel cantilever away from the safety helmet main body, and two restraint straps are symmetrically connected to the safety helmet main body;

[0008] A box body is further connected to the top of the brim flat plate, the top open end of the box body is hermetically covered with a box cover, a circuit board and a battery box are respectively connected to the inner cavity of the box body, a storage battery is provided inside the battery box, and a signal transmitter and a single-chip microcomputer are respectively provided on the circuit board.

[0009] On the basis of the above technical solution, the present invention can be further improved as follows.

[0010] Further, the monitoring unit includes a sliding strip, a driving gear, a protective box body, a controller, an inclined base and a servo motor;

[0011] The controller is fixedly connected to the side wall of the brim flat plate, the driving gear is arranged above the brim flat plate, and the driving gear is rotationally connected to the brim flat plate through a rotating shaft;

[0012] A plurality of obliquely arranged inclined sliding strips are uniformly arranged on the top surface of the sliding strip, a plurality of follower convex teeth that cooperate with the driving gear are uniformly connected to one side of the sliding strip close to the driving gear, a guiding sliding cavity is opened at the bottom of the sliding strip, a strip-shaped guiding slider adapted to it is movably inserted into the guiding sliding cavity, and the strip-shaped guiding slider is connected to the top surface of the brim flat plate, and a monitoring camera is connected to the side of the sliding strip away from the driving gear;

[0013] A driven base is arranged above the sliding strip, an inclined sliding cavity that cooperates with each inclined sliding strip is obliquely opened at the bottom surface of the driven base at a position corresponding to each inclined sliding strip, and each inclined sliding strip is respectively movably arranged in its corresponding inclined sliding cavity;

[0014] The inclined base is fixedly connected to the bottom surface of the brim flat plate, a micro camera is connected to the inclined surface of the inclined base, and an encoder is connected to the servo motor;

[0015] Flank sliding strips are connected to the front and rear side walls of the driven base, a C-shaped guiding sleeve adapted to each flank sliding strip is movably sleeved on the outer periphery of each flank sliding strip, first fixing legs are connected to the opposite surfaces of the two C-shaped guiding sleeves, and the two first fixing legs are both fixedly connected to the top surface of the brim flat plate, and a protective component is further provided on the driven base.

[0016] Furthermore, the servo motor is fixedly connected to the bottom surface of the brim flat plate, and the output shaft of the servo motor penetrates through the brim flat plate and is connected to the end of the rotating shaft.

[0017] Furthermore, the protective box body is fixedly connected to the top surface of the brim flat plate.

[0018] Furthermore, the protective component includes a horizontal pipe and a protective sleeve. Two second fixing legs are symmetrically connected to the side wall of the horizontal pipe. One end of the horizontal pipe is sealed, and the other end is open. An air outlet nozzle is communicated with the sealed end of the horizontal pipe. A second piston seat is movably arranged inside the horizontal pipe. A second sealing ring is sleeved and fixed on the outer periphery of the second piston seat. A push rod is connected to the side of the second piston seat away from the air outlet nozzle, and the end of the push rod away from the second piston seat extends out of the inner cavity of the horizontal pipe. A traction arm is connected to the end of the push rod away from the second piston seat;

[0019] The inner cavity of the protective sleeve is movably inserted with a transparent tempered glass plate. A connecting plate is connected to the top of the transparent tempered glass plate. A vertical pipe is arranged above the connecting plate. The vertical pipe is vertically arranged. The top end of the vertical pipe is sealed, and the bottom end is open. A long air guide hose is communicated with the top end of the vertical pipe. A first piston seat is movably arranged inside the vertical pipe. A first sealing ring is sleeved and fixed on the outer periphery of the first piston seat. A follower rod body is connected to the bottom surface of the first piston seat;

[0020] An adapter rod is also connected to the side wall of the vertical pipe.

[0021] Furthermore, both of the two second fixing legs are fixedly connected to the top surface of the brim flat plate.

[0022] Furthermore, the end of the adapter rod away from the vertical pipe is connected to the outer wall of the safety helmet main body.

[0023] Furthermore, the bottom end of the follower rod body is fixedly connected to the top of the connecting plate. The driven base is between the protective sleeve and the traction arm, and the end of the traction arm away from the push rod is connected to the end of the driven base. The protective sleeve is connected to the end of the driven base away from the traction arm.

[0024] Furthermore, the end of the long air guide hose away from the vertical pipe is communicated with the air outlet nozzle.

[0025] Furthermore, the first sealing ring is closely attached to the side wall of the inner cavity of the vertical pipe, and the second sealing ring is closely attached to the side wall of the inner cavity of the horizontal pipe.

[0026] 3. Beneficial effects:

[0027] (1) This monitoring system can protect the surveillance cameras used for online monitoring, thus effectively preventing the flying solid particles generated during the blasting operation from hitting and damaging the lenses of the surveillance cameras, ensuring that the picture quality of the online monitoring is not affected and guaranteeing the normal progress of the blasting operation examination;

[0028] (2) The micro-camera takes pictures of the faces of the examinees during the operation examination. Then, the face recognition system set on the single-chip microcomputer identifies the identities of the examinees based on the facial feature information collected by the micro-camera, thus avoiding the occurrence of proxy examination. The sound pickup microphone collects the sounds at the examination site, thereby preventing someone at the examination site from providing cheating sound information to the examinees during the operation, further enhancing the monitoring effect of this monitoring system;

[0029] (3) During the examination, the examinee controls the servo motor to work through the controller. Then, the servo motor drives the driving gear to rotate, enabling the driving gear to drive the sliding bar to move through the follower convex teeth. Subsequently, the sliding bar drives the surveillance camera to move out of the protective box body and conduct online monitoring of the examinees during the operation examination;

[0030] While the sliding bar pulls the surveillance camera to move, the diagonal slide bar on the top surface of the sliding bar drives the driven base to move through the diagonal slide cavity. When the driven base is moving, the driven base will push the push rod into the horizontal tube through the traction arm. Then, the second piston seat conducts the gas inside the horizontal tube to the vertical tube through the air guide long hose. When the air pressure in the vertical tube increases, the first piston seat drives the transparent toughened glass plate to move downward and block in front of the lens of the surveillance camera to protect it, enabling this monitoring system to adjust the position of the connecting plate while the surveillance camera is moving. When the surveillance camera moves to the required position, the transparent toughened glass plate can just block in front of the lens of the surveillance camera, saving the time for separately adjusting the position of the transparent toughened glass plate and further enhancing the working efficiency of this monitoring system;

[0031] (4) When the servo motor drives the driving gear to rotate, enabling the driving gear to drive the surveillance camera to move through the follower convex teeth, the angular displacement information of the rotating shaft of the servo motor is monitored by the encoder. The encoder then transmits the detection signal to the single-chip microcomputer. When the detected value of the encoder reaches the preset value of the single-chip microcomputer, the single-chip microcomputer controls the servo motor to shut down, thus ensuring that the surveillance camera can accurately move to the required position and stop automatically, facilitating the rapid execution of the online monitoring task by this system;

[0032] (5) After the practical operation exam ends, control the rotating shaft of the servo motor to flip through the controller, and then the driving gear drives the monitoring camera to move into the protective box body through the follower convex teeth, and the monitoring camera is protected by the protective box body. While the sliding strip is moving, the driven base pulls the push rod away from the air outlet nozzle through the traction arm. Subsequently, the second piston seat extracts the gas inside the vertical pipe through the long air guide hose, reducing the air pressure inside the vertical pipe. Then, the first piston seat drives the transparent tempered glass plate to move into the protective sleeve, and the transparent tempered glass plate is protected by the protective sleeve, which can effectively extend the service life of the transparent tempered glass plate.

[0033] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it in accordance with the content of the description, the following takes the preferred embodiments of the present invention and combines the accompanying drawings to elaborate in detail as follows. The specific implementation manners of the present invention are given in detail by the following embodiments and their accompanying drawings. Brief Description of the Drawings

[0034] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0035] Figure 1 It is a schematic structural diagram of an omni-directional monitoring online examination system based on face recognition provided by an embodiment of the present invention;

[0036] Figure 2 It is a partial enlarged view of A in an omni-directional monitoring online examination system based on face recognition provided by an embodiment of the present invention.

[0037] Figure 3 For Figure 1 It is a side view of the driven base in an omni-directional monitoring online examination system based on face recognition provided;

[0038] Figure 4 For Figure 1 It is a side view of the sliding strip in an omni-directional monitoring online examination system based on face recognition provided;

[0039] Figure 5 For Figure 1 It is a side view structural diagram of an omni-directional monitoring online examination system based on face recognition provided;

[0040] Figure 6 For Figure 1 It is a side view structural diagram of B in an omni-directional monitoring online examination system based on face recognition provided;

[0041] Figure 7 ForFigure 1 An elevation view of the brim flat plate in an all-round monitoring online examination system based on face recognition provided;

[0042] Figure 8 For Figure 1 A sectional view of the vertical pipe in an all-round monitoring online examination system based on face recognition provided;

[0043] Figure 9 For Figure 1 A sectional view of the horizontal pipe in an all-round monitoring online examination system based on face recognition provided;

[0044] Figure 10 For Figure 1 A side view of the box body in an all-round monitoring online examination system based on face recognition provided;

[0045] Figure 11 For Figure 1 A schematic electrical principle diagram of an all-round monitoring online examination system based on face recognition provided.

[0046] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0047] 1. Safety helmet main body; 2. Restraint strap; 3. Carbon steel cantilever; 4. Sound pickup microphone; 5. Brim flat plate; 6. Protective box body; 8. Vertical pipe; 9. Long air guide hose; 10. Connecting rod; 11. Box body; 12. Box cover; 13. First fixed leg; 14. Second fixed leg; 15. Driving gear; 16. Horizontal pipe; 17. Push-pull rod; 18. Traction arm; 19. Controller; 20. Follow-up rod body; 21. Sliding strip; 22. Oblique sliding strip; 23. Follow-up convex tooth; 24. Monitoring camera; 25. Strip-shaped guide slider; 26. Protective sleeve; 27. Connecting plate; 28. Inclined surface base; 29. Miniature camera; 30. Servo motor; 31. Encoder; 32. First piston seat; 33. First sealing ring; 34. Air outlet nozzle; 35. Second piston seat; 36. Second sealing ring; 37. Circuit board; 38. Signal transmitter; 39. Single-chip microcomputer; 40. Battery box; 41. Storage battery; 42. Driven base; 43. Flank sliding strip; 44. C-shaped guide sleeve. Detailed implementation manners

[0048] The following describes the principles and features of the present invention in conjunction with the attached Figure 1-11 drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention will be described more specifically by way of example with reference to the accompanying drawings. The advantages and features of the present invention will be clearer according to the following description and the claims. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0049] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are only for the purpose of illustration.

[0050] Unless otherwise defined, all technical and scientific terms used in this article have the same meaning as those commonly understood by those skilled in the technical field to which this invention belongs. The terms used in the specification of this invention are only for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" used in this article includes any and all combinations of one or more of the related listed items.

[0051] Embodiment:

[0052] As Figure 1-11 shown, the present invention provides an all-round monitoring online examination system based on face recognition, which includes a safety helmet main body 1. A brim flat plate 5 is connected to the outer wall of the safety helmet main body 1. A monitoring unit is provided on the brim flat plate 5. A carbon steel cantilever 3 is connected to the side wall of the safety helmet main body 1. The carbon steel cantilever 3 is made of carbon steel material and can be freely bent. A sound receiving microphone 4 is connected to one end of the carbon steel cantilever 3 away from the safety helmet main body 1. Two restraint straps 2 are symmetrically connected to the safety helmet main body 1;

[0053] A box body 11 is further connected to the top of the brim flat plate 5. The top open end of the box body 11 is hermetically covered with a box cover 12. A circuit board 37 and a battery box 40 are respectively connected to the inner cavity of the box body 11. A storage battery 41 is provided inside the battery box 40. A signal transmitter 38 and a single-chip microcomputer 39 are respectively provided on the circuit board 37.

[0054] The monitoring unit includes a sliding strip 21, a driving gear 15, a protective box body 6, a controller 19, an inclined base 28 and a servo motor 30;

[0055] The controller 19 is fixedly connected to the side wall of the brim flat plate 5. The driving gear 15 is arranged above the brim flat plate 5, and the driving gear 15 is rotationally connected to the brim flat plate 5 through a rotating shaft;

[0056] On the top surface of the sliding strip 21, a plurality of obliquely arranged inclined sliding strips 22 are evenly provided. On one side of the sliding strip 21 close to the driving gear 15, a plurality of follower convex teeth 23 that cooperate with the driving gear 15 are evenly connected. A guiding sliding cavity is formed at the bottom of the sliding strip 21, and a strip-shaped guiding slider 25 adapted to it is movably inserted into the guiding sliding cavity. The strip-shaped guiding slider 25 is connected to the top surface of the brim flat plate 5. On the side of the sliding strip 21 away from the driving gear 15, a monitoring camera 24 is connected.

[0057] Above the sliding strip 21, there is a driven base 42. At the position corresponding to each inclined sliding strip 22 on the bottom surface of the driven base 42, an inclined sliding cavity that cooperates with it is obliquely formed, and each inclined sliding strip 22 is respectively movably arranged in its corresponding inclined sliding cavity.

[0058] The inclined surface base 28 is fixedly connected to the bottom surface of the brim flat plate 5. A micro camera 29 is connected to the inclined surface of the inclined surface base 28. An encoder 31 is connected to the servo motor 30. This monitoring system collects the facial feature information of the practical exam takers through the micro camera 29. The face recognition system set on the single-chip microcomputer 39 identifies the identity of the exam takers based on the facial feature information collected by the micro camera 29, thus avoiding the occurrence of proxy exams. The sound at the exam site is collected through the sound pickup microphone 4, so as to prevent someone at the exam site from providing cheating sound information to the practical exam takers through sound, thereby further improving the monitoring effect of this monitoring system. The information monitored by the sound pickup microphone 4 and the monitoring camera 24 is transmitted to the monitoring terminal device of the invigilator. The monitoring terminal device can be a conventional known device such as a computer or a smart phone. The sound information collected by the sound pickup microphone 4 is sent to the monitoring terminal device through the signal transmitter 38. The monitoring camera 24 is wirelessly connected to the monitoring terminal device through a wireless network and transmits the monitoring signal to the monitoring terminal device. The single-chip microcomputer is connected to the monitoring terminal device through Bluetooth, a data network or a wireless network.

[0059] On the front and rear side walls of the driven base 42, wing sliding strips 43 are connected. An outer periphery of each wing sliding strip 43 is movably sleeved with a C-shaped guiding sleeve 44 adapted to it. On the opposite surfaces of the two C-shaped guiding sleeves 44, first fixing legs 13 are connected, and the two first fixing legs 13 are both fixedly connected to the top surface of the brim flat plate 5. A protective component is also provided on the driven base 42.

[0060] The servo motor 30 is fixedly connected to the bottom surface of the brim flat plate 5, and the output shaft of the servo motor 30 penetrates through the brim flat plate 5 and is connected to the end of the rotating shaft.

[0061] The protective box body 6 is fixedly connected to the top surface of the brim flat plate 5. During the exam, the candidate controls the servo motor 30 to work through the controller 19, and then the servo motor 30 drives the driving gear 15 to rotate, so that the driving gear 15 can drive the sliding bar 21 to move through the follower convex teeth 23. Subsequently, the sliding bar 21 drives the monitoring camera 24 to move out from inside the protective box body 6 and conduct on-site monitoring of the practical exam for the examinees. The sound pickup microphone 4, the controller 19, the monitoring camera 24, the micro camera 29, the servo motor 30, the encoder 31, the circuit board 37, the signal transmitter 38, and the single-chip microcomputer 39 are all electrically connected to the storage battery 41.

[0062] The protective component includes a horizontal pipe 16 and a protective sleeve 26. Two second fixed legs 14 are symmetrically connected to the side wall of the horizontal pipe 16. One end of the horizontal pipe 16 is sealed, and the other end of the horizontal pipe 16 is open. An air outlet nozzle 34 is communicated with the sealed end of the horizontal pipe 16. A second piston seat 35 is movably arranged inside the horizontal pipe 16. A second sealing ring 36 is sleeved and fixed on the outer periphery of the second piston seat 35. A push-pull rod 17 is connected to the side of the second piston seat 35 away from the air outlet nozzle 34, and the end of the push-pull rod 17 away from the second piston seat 35 extends out of the inner cavity of the horizontal pipe 16. A traction arm 18 is connected to the end of the push-pull rod 17 away from the second piston seat 35;

[0063] A transparent tempered glass plate is movably inserted into the inner cavity of the protective sleeve 26. A connecting plate 27 is connected to the top of the transparent tempered glass plate. A vertical pipe 8 is arranged above the connecting plate 27. The vertical pipe 8 is vertically arranged, and the top end of the vertical pipe 8 is sealed, and the bottom end of the vertical pipe 8 is open. A guiding air long hose 9 is communicated with the top end of the vertical pipe 8. A first piston seat 32 is movably arranged inside the vertical pipe 8. A first sealing ring 33 is sleeved and fixed on the outer periphery of the first piston seat 32. A follower rod body 20 is connected to the bottom surface of the first piston seat 32;

[0064] An adapter rod 10 is also connected to the side wall of the vertical pipe 8.

[0065] Both of the two second fixed legs 14 are fixedly connected to the top surface of the brim flat plate 5.

[0066] The end of the adapter rod 10 away from the vertical pipe 8 is connected to the outer wall of the safety helmet main body 1.

[0067] The bottom end of the follower rod body 20 is fixedly connected to the top of the connecting plate 27. The driven base 42 is located between the protective sleeve 26 and the traction arm 18, and the end of the traction arm 18 away from the push-pull rod 17 is connected to the end of the driven base 42. The protective sleeve 26 is connected to the end of the driven base 42 away from the traction arm 18.

[0068] The end of the guiding air long hose 9 away from the vertical pipe 8 is communicated with the air outlet nozzle 34.

[0069] The first sealing ring 33 is closely attached to the side wall of the inner cavity of the vertical pipe 8, and the second sealing ring 36 is closely attached to the side wall of the inner cavity of the horizontal pipe 16. While the sliding strip 21 pulls the monitoring camera 24 to move, the inclined sliding strip 22 on the top surface of the sliding strip 21 drives the driven base 42 to move through the inclined sliding cavity. When the driven base 42 is moving, the driven base 42 will push the push rod 17 into the horizontal pipe 16 through the traction arm 18. Then, the second piston seat 35 conducts the gas inside the horizontal pipe 16 to the vertical pipe 8 through the long air guide hose 9. When the air pressure in the vertical pipe 8 increases, the first piston seat 32 drives the transparent toughened glass plate to move downward and blocks in front of the lens of the monitoring camera 24 to protect it. Thus, it effectively prevents the flying solid particles generated during the blasting operation from hitting and damaging the lens of the monitoring camera 24, ensuring that the picture quality of the on-line monitoring is not affected, guaranteeing the normal progress of the blasting operation examination, and enabling the monitoring system to adjust the position of the connecting plate 27 while the monitoring camera 24 is moving. When the monitoring camera 24 moves to the required position, the transparent toughened glass plate can just block in front of the lens of the monitoring camera 24, saving the time for separately adjusting the position of the transparent toughened glass plate and further improving the working efficiency of the monitoring system.

[0070] Please refer to Figure 1-11, this monitoring system collects the facial feature information of the practical exam takers through the micro camera 29. The face recognition system set on the single-chip microcomputer 39 identifies the identity of the exam takers based on the facial feature information collected by the micro camera 29, thus avoiding the occurrence of proxy exams. The sound of the exam site is collected through the sound pickup microphone 4, so as to prevent someone at the exam site from providing cheating sound information to the practical exam takers through sound, thereby further improving the monitoring effect of this monitoring system. During the exam, the examinee controls the servo motor 30 to work through the controller 19, and then the servo motor 30 drives the driving gear 15 to rotate, so that the driving gear 15 can drive the sliding bar 21 to move through the follower convex teeth 23. Subsequently, the sliding bar 21 drives the monitoring camera 24 to move out from inside the protective box body 6 and conduct online monitoring of the exam takers during the practical exam. While the sliding bar 21 pulls the monitoring camera 24 to move, the inclined slide bar 22 on the top surface of the sliding bar 21 drives the driven base 42 to move through the inclined slide cavity. When the driven base 42 is moving, the driven base 42 will push the push rod 17 into the horizontal pipe 16 through the traction arm 18, and then the second piston seat 35 conducts the gas inside the horizontal pipe 16 to the vertical pipe 8 through the air guide long hose 9. When the air pressure in the vertical pipe 8 increases, the first piston seat 32 drives the transparent tempered glass plate to move downward and block in front of the lens of the monitoring camera 24 to protect it, thus effectively preventing the flying solid particles generated during the blasting practical operation from hitting and damaging the lens of the monitoring camera 24, ensuring that the picture quality of the online monitoring is not affected, guaranteeing the normal progress of the blasting practical exam, and enabling this monitoring system to adjust the position of the connecting plate 27 while the monitoring camera 24 is moving. When the monitoring camera 24 moves to the required position, the transparent tempered glass plate can just block in front of the lens of the monitoring camera 24, saving the time for separately adjusting the position of the transparent tempered glass plate and further improving the working efficiency of this monitoring system. When the servo motor 30 drives the driving gear 15 to rotate, so that the driving gear 15 drives the monitoring camera 24 to move through the follower convex teeth 23, the angular displacement information of the rotating shaft of the servo motor 30 is monitored through the encoder 31, and the encoder 31 then transmits the detection signal to the single-chip microcomputer 39. When the detection value of the encoder 31 reaches the preset value of the single-chip microcomputer 39, the single-chip microcomputer 39 controls the servo motor 30 to turn off, thus ensuring that the monitoring camera 24 can accurately move to the required position and stop automatically, facilitating the quick online monitoring task of this system.After the practical operation test is over, the rotation shaft of the servo motor 30 is flipped by the controller 19, and then the driving gear 15 drives the monitoring camera 24 to move into the protective box body 6 through the follower convex teeth 23, and the monitoring camera 24 is protected by the protective box body 6. When the sliding strip 21 moves, the driven base 42 pulls the push rod 17 away from the air outlet nozzle 34 through the traction arm 18. Subsequently, the second piston seat 35 extracts the gas inside the vertical pipe 8 through the long air guide hose 9, reducing the air pressure inside the vertical pipe 8. Then, the first piston seat 32 drives the transparent toughened glass plate to move into the protective sleeve 26, and the transparent toughened glass plate is protected by the protective sleeve 26, which can effectively improve the service life of the transparent toughened glass plate.

[0071] 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. The electrical components described in this article are all electrically connected to the single-chip microcomputer 39. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0072] The above is only the preferred embodiment of the present invention, and does not impose any form of limitation on the present invention; any ordinary technician in the industry can smoothly implement the present invention according to the illustrations in the specification and the above; however, any equivalent changes, such as slight modifications, evolutions made by those skilled in the art within the scope of the technical solution of the present invention using the technical content disclosed above, are all equivalent embodiments of the present invention; at the same time, any equivalent changes, such as modifications, evolutions made to the above embodiments based on the essence of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. An omni-directional monitoring online examination system based on face recognition, characterized in that, it includes a safety helmet main body (1), a brim flat plate (5) is connected to the outer wall of the safety helmet main body (1), a monitoring unit is provided on the brim flat plate (5), a carbon steel cantilever (3) is connected to the side wall of the safety helmet main body (1), a sound pickup microphone (4) is connected to one end of the carbon steel cantilever (3) far away from the safety helmet main body (1), and two restraint straps (2) are symmetrically connected to the safety helmet main body (1); A box body (11) is further connected to the top of the brim flat plate (5), a box cover (12) is hermetically covered at the open top of the box body (11), a circuit board (37) and a battery box (40) are respectively connected to the inner cavity of the box body (11), a storage battery (41) is provided inside the battery box (40), and a signal transmitter (38) and a single-chip microcomputer (39) are respectively provided on the circuit board (37); The monitoring unit includes a sliding strip (21), a driving gear (15), a protective box body (6), a controller (19), an inclined plane base (28) and a servo motor (30); The controller (19) is fixedly connected to the side wall of the brim flat plate (5), the driving gear (15) is arranged above the brim flat plate (5), and the driving gear (15) is rotatably connected to the brim flat plate (5) through a rotating shaft; A plurality of obliquely arranged inclined sliding strips (22) are evenly provided on the top surface of the sliding strip (21), a plurality of follower convex teeth (23) which cooperate with the driving gear (15) are evenly connected to one side of the sliding strip (21) close to the driving gear (15), a guiding sliding cavity is opened at the bottom of the sliding strip (21), a strip-shaped guiding slider (25) which is adapted to it is movably inserted into the guiding sliding cavity, and the strip-shaped guiding slider (25) is connected to the top surface of the brim flat plate (5), and a monitoring camera (24) is connected to one side of the sliding strip (21) far away from the driving gear (15); A driven base (42) is arranged above the sliding strip (21), an inclined sliding cavity which cooperates with each inclined sliding strip (22) is obliquely opened at the bottom surface of the driven base (42) corresponding to the position of each inclined sliding strip (22), and each inclined sliding strip (22) is respectively movably arranged in its corresponding inclined sliding cavity; The inclined plane base (28) is fixedly connected to the bottom surface of the brim flat plate (5), a micro camera (29) is connected to the inclined surface of the inclined plane base (28), and an encoder (31) is connected to the servo motor (30); Flank sliding strips (43) are connected to the front and rear side walls of the driven base (42), a C-shaped guiding sleeve (44) which is adapted to it is movably sleeved on the outer circumference of each flank sliding strip (43), first fixing legs (13) are connected to the opposite surfaces of the two C-shaped guiding sleeves (44), and the two first fixing legs (13) are both fixedly connected to the top surface of the brim flat plate (5), and a protective component is further provided on the driven base (42); The protective component includes a horizontal pipe (16) and a protective sleeve (26). Two second fixing legs (14) are symmetrically connected to the side wall of the horizontal pipe (16). One end of the horizontal pipe (16) is sealed, and the other end of the horizontal pipe (16) is open. An air outlet nozzle (34) is communicated with the sealed end of the horizontal pipe (16). A second piston seat (35) is movably arranged inside the horizontal pipe (16). A second sealing ring (36) is sleeved and fixed on the outer periphery of the second piston seat (35). A push-pull rod (17) is connected to the side of the second piston seat (35) away from the air outlet nozzle (34), and one end of the push-pull rod (17) away from the second piston seat (35) extends out of the inner cavity of the horizontal pipe (16). A traction arm (18) is connected to the end of the push-pull rod (17) away from the second piston seat (35). A transparent tempered glass plate is movably inserted into the inner cavity of the protective sleeve (26). A connecting plate (27) is connected to the top of the transparent tempered glass plate. A vertical pipe (8) is arranged above the connecting plate (27). The vertical pipe (8) is vertically arranged. The top end of the vertical pipe (8) is sealed, and the bottom end of the vertical pipe (8) is open. A gas guiding long hose (9) is communicated with the top end of the vertical pipe (8). A first piston seat (32) is movably arranged inside the vertical pipe (8). A first sealing ring (33) is sleeved and fixed on the outer periphery of the first piston seat (32). A follower rod body (20) is connected to the bottom surface of the first piston seat (32). An adapter rod (10) is also connected to the side wall of the vertical pipe (8). The servo motor (30) is fixedly connected to the bottom surface of the brim flat plate (5), and the output shaft of the servo motor (30) penetrates through the brim flat plate (5) and is connected to the end of the rotating shaft.

2. The all-round monitoring online examination system based on face recognition according to claim 1, characterized in that, The protective box body (6) is fixedly connected to the top surface of the brim flat plate (5).

3. The all-round monitoring online examination system based on face recognition according to claim 1, characterized in that, Both of the two second fixing legs (14) are fixedly connected to the top surface of the brim flat plate (5).

4. The all-round monitoring online examination system based on face recognition according to claim 1, characterized in that, One end of the adapter rod (10) away from the vertical pipe (8) is connected to the outer wall of the safety helmet main body (1).

5. The all-round monitoring online examination system based on face recognition according to claim 1, characterized in that, The bottom end of the follower rod body (20) is fixedly connected to the top of the connecting plate (27). The driven base (42) is located between the protective sleeve (26) and the traction arm (18). One end of the traction arm (18) away from the push-pull rod (17) is connected to the end of the driven base (42). The protective sleeve (26) is connected to the end of the driven base (42) away from the traction arm (18).

6. The all-round monitoring online examination system based on face recognition according to claim 1, characterized in that, One end of the long air guide hose (9) far from the vertical pipe (8) is communicated with the air outlet nozzle (34).

7. The all-round monitoring online examination system based on face recognition according to claim 1, characterized in that the first sealing ring (33) is closely attached to the side wall of the inner cavity of the vertical pipe (8), and the second sealing ring (36) is closely attached to the side wall of the inner cavity of the horizontal pipe (16).

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