Audio and video device and control system thereof

Abstract

The invention discloses an audio and video device and a control system thereof, and relates to the technical field of audio and video interaction. The protection problem is solved. The shell cover is fixed to the inner side of the top of the bottom shell, the displayer is in transmission connection with the bottom shell through a multi-angle adjusting mechanism, and a camera is arranged on the front side of the displayer; a control mainboard is fixed in the bottom shell, a loudspeaker and a microphone in a rectangular array are fixed on the front side of the bottom shell, and the display, the microphone and the loudspeaker are all electrically connected to the control mainboard; the front side of the bottom shell is rotationally connected with a protection shell through a hinge shaft. By arranging the protection shell, on one hand, the microphone and the loudspeaker can be protected, meanwhile, dust can be prevented from being accumulated on the microphone and the loudspeaker in a non-use state, the service life is prolonged, and the use effect is improved, on the other hand, by arranging the fixing assembly, common tools can be stored, stored and fixed through the fixing assembly, and use is convenient. And therefore, the use convenience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of audio - video interaction, and particularly to an audio - video device and its control system. Background Art

[0002] With the development of network technology, audio - video remote communication has also been widely used. With the combination of network networking protocols and audio - video interaction devices, forms of remote one - to - one, one - to - many, etc. communication can be achieved.

[0003] After retrieval, a patent with the Chinese patent publication number CN 115294896 B discloses an AI - based intelligent audio - video interaction device, including a base, a box body, and an interaction component. The interaction component includes a sensing unit, a processing unit, and a display unit. Inside the base and near the center, there is a fixing frame. On the top of the fixing frame, there is a movable frame. Above the movable frame, there is a movable column. Outside the movable column, there is a lifting column. A rotating mechanism is provided between the fixing frame and the movable frame. A connecting mechanism is provided between the movable frame and the movable column. Inside the lifting column, there is a lifting mechanism connected to the movable column. Inside the movable column, there is an inclination mechanism.

[0004] The above - mentioned patent has the following deficiencies: Both the microphone and the speaker, which are the core components of audio - video interaction, are exposed for a long time. On the one hand, there is a risk of collision damage, and on the other hand, dust accumulation will occur during use, affecting the use effect.

[0005] Therefore, the present invention proposes an audio - video device and its control system. Summary of the Invention

[0006] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose an audio - video device and its control system.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] An audio - video device includes a bottom shell, a shell cover fixed to the inner side of the top of the bottom shell, and a display drivenly connected to the bottom shell through a multi - angle adjustment mechanism. A camera is arranged on the front side of the display;

[0009] A control main board is fixed inside the bottom shell. A speaker and a rectangular - array microphone are fixed on the front side of the bottom shell. The display, the microphone, and the speaker are all electrically connected to the control main board;

[0010] A protective shell is rotatably connected to the front side of the bottom shell through a hinge shaft. A fixing component for storing tools is arranged on the inner side of the protective shell.

[0011] Preferably: heat dissipation channels are provided on the inner walls of both symmetric sides of the bottom case, and heat dissipation fans for heat dissipation are arranged inside the heat dissipation channels; a plurality of blocking doors arranged in a circular array are slidably connected to the inner walls of the heat dissipation channels outside the heat dissipation fans, and the plurality of blocking doors can completely block or completely open the heat dissipation channels.

[0012] Furthermore: the blocking doors are connected to the inner walls of the heat dissipation channels through springs, and magnetic attraction blocks are fixed to the side walls of the blocking doors. Electromagnets magnetically matched with the magnetic attraction blocks are fixed to the inner walls of the heat dissipation channels opposite to the magnetic attraction blocks, and the electromagnets are connected to the power supply circuit of the heat dissipation fans.

[0013] On the basis of the foregoing solution: a first pulling rope is fixed to the side wall of the blocking door, the other end of the first pulling rope is connected to the side wall of the protective case, and a torsion spring is buckled at the hinge joint between the protective case and the bottom case.

[0014] A better solution in the foregoing solution is: a plurality of supporting feet are arranged at the bottom of the bottom case. The supporting feet at the front side are composed of a cylinder fixed to the bottom of the bottom case and a flexible gasket fixed to the bottom of the cylinder. A piston is slidably connected to the inner wall of the flexible gasket. A second pulling rope is fixed to the top of the piston. The other end of the second pulling rope converges with the first pulling rope into one strand, and a receiving groove matching the paths of the first pulling rope and the second pulling rope is provided on the inner wall of the bottom case.

[0015] A control system of an audio-visual device includes:

[0016] A power supply module, which supplies power to electrical components in the form of an external power cord or an internal charging power supply;

[0017] A signal receiving module, which is communicatively connected to a camera and a microphone and receives signals from the camera and the microphone. At the same time, a communication unit is built in the signal receiving module, and a communication connection is established with a communication device through the communication unit;

[0018] A central processing module, which receives data from the signal receiving module and processes the data to generate control instructions;

[0019] A control module, which is controllably connected to a multi-angle adjustment mechanism, a display, a speaker, a heat dissipation fan, and an electromagnet. The control module receives control instructions from the central processing module, and then controls the multi-angle adjustment mechanism, the display, the speaker, the heat dissipation fan, and the electromagnet to perform corresponding executions according to the control instructions.

[0020] At the same time, the working logic of the control system includes the following steps:

[0021] S1: When starting up, the control module of the control main board controls the display, the speaker, the heat dissipation fan, the electromagnet, and the camera to start synchronously, and then establishes a communication connection with an external communication device through the signal receiving module to perform data interaction;

[0022] S2: During the interaction process, the microphone collects sound signals, and the signal receiving module collects and transmits the sound to the central processing module for positioning. After positioning, noise is removed.

[0023] S3: Meanwhile, the central processing module determines the relative position between the user and the display according to the positioning information, generates a control instruction based on the relative position, and then transmits it to the control module. The control module controls the display to adjust the angular orientation so that the display faces the speaker's position.

[0024] S4: Moreover, the central processing module determines the distance between the user and the speaker by judging the relative position between the user and the display according to the positioning information, and then controls the volume output of the speaker according to the distance between the user and the speaker.

[0025] As a preferred embodiment of the present invention: In the step S2, the positioning method includes the following steps:

[0026] S21: Taking the bottom case as a reference, a three-dimensional space coordinate system is established, and according to the installation position of the microphone relative to the bottom case, the three-dimensional coordinates of each microphone in the three-dimensional coordinate system are determined.

[0027] S22: All microphones are arranged and combined under the condition constraint of three microphones not on the same straight line to form n combinations.

[0028] S23: Arbitrarily select one combination, and the three sensors are denoted as No. 1, No. 2, and No. 3.

[0029] (x 1 , y 1 , z 1 )

[0030] Obtain their coordinates as (x 2 , y 2 , z 2 ), and when the sound signal received by the microphone

[0031] (x 3 , y 3 , z 3 )

[0032] The sequence difference or the distance Δ 12 , Δ 13 , Δ 23 between the speaker's azimuth and the positions of the three sensors, which are the distance differences between No. 1 and No. 2, between No. 1 and No. 3, and between No. 2 and No. 3, respectively;

[0033] S24: Establish a joint solution model. d1, d2, and d3 are the distances between the speaker and sensors No. 1, No. 2, and No. 3 respectively, where where (x′, y′, z′) are the three-dimensional coordinates of the speaker;

[0034] S25: According to the joint solution model, repeat step S23 until all n combinations are solved, obtaining the three-dimensional coordinates of n speakers;

[0035] S26: Perform data anomaly verification on the three-dimensional coordinates obtained from the n solutions, remove the abnormal data, then sum the remaining data, and take the average of the sum to obtain the final coordinates of the speaker;

[0036] In step S26, the method for data anomaly verification includes the following steps:

[0037] S261: Set the error threshold σ according to the accuracy of the microphone;

[0038] S262: Calculate the mean coordinate of the n obtained solution values as

[0039] S263: If or or then discard it, otherwise retain it, where x i ′, y i ′, z i ′ are the three-dimensional coordinates of the i-th result among the n solution results.

[0040] Meanwhile, in step S2, the method for removing noise includes the following steps:

[0041] A1: Centered on the positioning point, establish a tolerance three-dimensional space region with a preset tolerance R as the radius;

[0042] A2: Calculate the azimuth of all sound sources through the microphone, and remove all sound signals not within the tolerance three-dimensional space region.

[0043] As a more optimal solution of the present invention: In step S4, the adjustment logic for the volume output size includes the following steps:

[0044] S41: Obtain the human body comfortable sound intensity A 1 ;

[0045] S42: Obtain the average sound intensity A 2 of the removed noise;

[0046] S43: Then, according to the formula A 1 = (A 0 - k 1 A 2 )k 2 L, obtain the volume output size A 0 of the speaker, where k1 is the environmental noise impact coefficient, k 2 is the attenuation rate of sound propagation in the air, and L is the straight-line distance between the speaker and the loudspeaker.

[0047] The beneficial effects of the present invention are:

[0048] 1. The present invention, by providing a protective shell, can protect the microphone and the speaker while preventing dust accumulation on the microphone and the speaker when not in use, thereby extending the service life and increasing the use effect. On the other hand, by providing a fixing component, the fixing component can store, contain and fix commonly used tools, thereby increasing the convenience of use.

[0049] 2. The present invention, on the basis of arranging the heat dissipation of the heat dissipation fan, arranges a blocking door, which can open the heat dissipation channel when heat dissipation is in progress and close it when heat dissipation is not in progress, thereby preventing dust from entering the bottom shell due to the normally open state. At the same time, the opening and closing of the blocking door is controlled by an integrated system of an electromagnet and a spring, which is fully automatically synchronized with the opening and closing of the device, thereby simplifying the control logic.

[0050] 3. The present invention, by providing supporting feet and targeted and detailed design of the supporting feet, can utilize negative pressure to make the device adsorb to the supporting desktop, thereby increasing the stability of use. On the other hand, by providing pull rope 1 and pull rope 2, the pulling and elastic forces are cleverly utilized to synchronize the opening and closing of the protective shell and the adsorption state of the supporting feet on the desktop with the position of the blocking door, thereby realizing the functions of automatic opening of the blocking door and the protective shell when the machine is turned on, automatic opening of the supporting feet, and automatic closing of the blocking door and the protective shell when the machine is turned off, and de-adsorption of the supporting feet.

[0051] 4. The present invention adopts the form of user positioning to enable the angle of the display to follow, thereby increasing the use effect. In addition, the user positioning adopts the timing analysis positioning of the microphone. Compared with the positioning by image processing, the calculation difficulty is low and the response speed is fast. At the same time, for the positioning data, multiple groups of data verification are adopted to discard abnormal values, thereby increasing the positioning accuracy. In addition, on the basis of positioning, the noise in other directions can be distinguished to ensure the pertinence and clarity of sound collection. On the basis of noise resolution, the volume of the speaker can also be controlled by sound attenuation and noise compensation, thereby increasing the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a schematic diagram of the overall structure of an audio and video device proposed by the present invention;

[0053] Figure 2 An audio and video device proposed by the present invention Figure 1 The enlarged structural diagram of part A in the middle;

[0054] Figure 3A schematic diagram of the protective shell structure of an audio and video device proposed by the present invention;

[0055] Figure 4 A schematic diagram of the position structure of a heat dissipation fan of an audio and video device proposed by the present invention;

[0056] Figure 5 A schematic diagram of the position structure of a blocking door of an audio and video device proposed by the present invention;

[0057] Figure 6 This is a structural schematic diagram of a driving transmission part of an audio and video device proposed by the present invention;

[0058] Figure 7 The present invention provides a schematic structural diagram of an audio and video device and a control system thereof.

[0059] In the figure: 1. bottom shell; 2. shell cover; 3. multi-angle adjustment mechanism; 4. display; 5. microphone; 6. speaker; 7. protective shell; 8. fixing assembly; 9. support foot; 10. storage box; 11. elastic band; 12. elastic pen clip; 13. cooling fan; 14. control main board; 15. cooling channel; 16. blocking door; 17. magnetic block; 18. spring; 19. electromagnet; 20. torsion spring; 21. hinge shaft; 22. pull rope 1; 23. cylinder body; 24. flexible gasket; 25. piston; 26. pull rope 2. DETAILED DESCRIPTION

[0060] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0061] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0062] Embodiment 1:

[0063] An audio and video device, such as Figures 1 - 6 As shown, it includes a bottom shell 1, a shell cover 2 fixed to the inner side of the top of the bottom shell 1, and a display 4 connected to the bottom shell 1 through a multi-angle adjustment mechanism 3. A camera is arranged on the front side of the display 4. In this embodiment, the specific type of the display 4 is not limited. It is intended to enable the display 4 to complete the driving movement of lifting, rotating and changing the angle of inclination relative to the bottom shell 1. Since it is a prior art, for example, it can be directly implemented by using the structure in patent announcement number CN115294896 B. This embodiment does not make creative work on it, so it will not be described in detail.

[0064] Inside the bottom case 1, a control main board 14 is fixed. On the front side of the bottom case 1, a speaker 6 and a rectangular array of microphones 5 are fixed. The display 4, the microphones 5, and the speaker 6 are all electrically connected to the control main board 14.

[0065] On the front side of the bottom case 1, a protective case 7 is rotatably connected through a hinge shaft 21. Inside the protective case 7, a fixing component 8 for storing common tools is provided.

[0066] The fixing component 8 is designed to store and fix common tools, such as pens, notebooks, and other tools commonly used in office work, study, and meetings. In this embodiment, the fixing component 8 includes a storage box 10, an elastic band 11, and an elastic pen clip 12. The storage box 10, the elastic band 11, and the elastic pen clip 12 are all fixed inside the protective case 7.

[0067] When the device is in use, the display 4 can play videos, the camera can collect videos, the speaker 6 can play audio, and the microphone 5 can collect sounds. At the same time, when in use, the protective case 7 can be rotated open to expose the microphone 5 and the speaker 6. When not in use, the protective case 7 can be rotated closed to protect the microphone 5 and the speaker 6. Moreover, common tools can also be stored and fixed through the fixing component 8 inside the protective case 7.

[0068] In this device, by setting the protective case 7, on the one hand, it can protect the microphone 5 and the speaker 6 and prevent dust from accumulating on the microphone 5 and the speaker 6 in the non-use state, extending the service life and enhancing the use effect. On the other hand, by setting the fixing component 8, the fixing component 8 can store, organize, and fix common tools, thereby increasing the convenience of use.

[0069] To solve the heat dissipation problem; as Figure 4 shown, heat dissipation channels 15 are provided on the inner walls of the symmetric two sides of the bottom case 1. Inside the heat dissipation channels 15, heat dissipation fans 13 for heat dissipation are provided.

[0070] On the inner wall of the heat dissipation channel 15 outside the heat dissipation fan 13, a plurality of blocking doors 16 arranged in a circular array are slidably connected. The plurality of blocking doors 16 can completely block or completely open the heat dissipation channel 15.

[0071] The blocking door 16 is connected to the inner wall of the heat dissipation channel 15 through a spring 18. And a magnetic attraction block 17 is fixed on the side wall of the blocking door 16. On the inner wall of the heat dissipation channel 15 opposite to the magnetic attraction block 17, an electromagnet 19 magnetically cooperating with the magnetic attraction block 17 is fixed. The electromagnet 19 is connected to the power supply circuit of the heat dissipation fan 13.

[0072] When the device is powered on, the cooling fan 13 and the electromagnet 19 are powered on and started accordingly, generating a magnetic suction force to adsorb the magnetic block 17, causing the blocking door 16 to move radially outward along the heat dissipation channel 15, and the heat dissipation channel 15 is opened. The cooling fan 13 causes a directional air flow to be generated inside the bottom case 1 to dissipate the heat in the inner cavity of the bottom case 1. When the device is powered off, the cooling fan 13 and the electromagnet 19 are turned off accordingly, causing the electromagnet 19 to lose its magnetic field, and the blocking door 16 is blocked by the elastic force of the spring 18 to block the heat dissipation channel 15.

[0073] In this device, on the basis of setting the cooling fan 13 for heat dissipation, by setting the blocking door 16, it can open the heat dissipation channel 15 during heat dissipation and close it when not in heat dissipation, thereby preventing dust from entering the bottom case 1 in the normally open state. At the same time, the opening and closing of the blocking door 16 are comprehensively controlled by the electromagnet 19 and the spring 18, and its opening and closing are completely synchronized automatically with the device, simplifying the control logic.

[0074] To solve the problems of fixation and synchronization; as Figure 6 shown, a first pulling rope 22 is fixed to the side wall of the blocking door 16, and the other end of the first pulling rope 22 is connected to the side wall of the protective case 7, and a torsion spring 20 is buckled at the hinge joint between the protective case 7 and the bottom case 1.

[0075] A plurality of feet 9 are provided at the bottom of the bottom case 1. The foot 9 located at the front side is composed of a cylinder 23 fixed to the bottom of the bottom case 1 and a flexible gasket 24 fixed to the bottom of the cylinder 23. The inner wall of the flexible gasket 24 is slidably connected with a piston 25. A second pulling rope 26 is fixed to the top of the piston 25. The other end of the second pulling rope 26 converges with the first pulling rope 22 into one strand, and a receiving groove matching the paths of the first pulling rope 22 and the second pulling rope 26 is provided on the inner wall of the bottom case 1.

[0076] When in the powered-on state, when the blocking door 16 moves outward to open the heat dissipation channel 15, at the same time, the pulling effect of the blocking door 16 on the first pulling rope 22 disappears, and the protective case 7 is opened under the torsional force of the torsion spring 20. At the same time, the piston 25 is pulled up by pulling the second pulling rope 26. At this time, due to the flexibility of the flexible gasket 24, it will be relatively sealed with the desktop. When the piston 25 moves up, a negative pressure will appear in the relatively sealed space between the cylinder 23 and the desktop, and the device is fixed by using the negative pressure adsorption. When in the powered-off state, the blocking door 16 resets, thereby pulling the first pulling rope 22, causing the protective case 7 to rotate and close. At the same time, the convergence point of the second pulling rope 26 and the first pulling rope 22 resets, the second pulling rope 26 becomes slack, the piston 25 resets, and the negative pressure basically disappears, releasing the fixed state.

[0077] The device, by providing the support foot 9 and the targeted and detailed design of the support foot 9, can utilize the negative pressure to make the device adsorb to the supporting desktop, thereby increasing the stability of use. On the other hand, by providing the pull rope 1 22 and the pull rope 2 26, the pulling and elastic forces are cleverly utilized to synchronize the opening and closing of the protective shell 7 and the adsorption state of the support foot 9 on the desktop with the position of the blocking door 16, thereby realizing the functions of automatic opening of the blocking door 16 and the protective shell 7 when the machine is turned on, and automatic adsorption of the support foot 9, and automatic closing of the blocking door 16 and the protective shell 7 when the machine is turned off, and the release of adsorption of the support foot 9.

[0078] When the present embodiment is in use, when the machine is turned on, the blocking door 16 moves outward to open the heat dissipation channel 15, and at the same time, the pulling effect of the blocking door 16 on the pull rope 1 22 disappears, and the protective shell 7 is opened by the torsion of the torsion spring 20, and at the same time, the piston 25 moves upward by pulling the pull rope 26. At this time, due to the flexibility of the flexible gasket 24, it will be relatively sealed with the desktop, and the upward movement of the piston 25 will cause negative pressure in the relatively sealed space between the cylinder body 23 and the desktop, which is fixed by adsorption using the negative pressure. Then, the display 4 can play videos, the camera can collect videos, the speaker 6 can play audio, and the microphone 5 can collect sounds. In addition, the heat dissipation fan 13 and the electromagnet 19 are powered on and started, thereby generating magnetic attraction. The magnetic block 17 is adsorbed to make the blocking door 16 move radially outward along the heat dissipation channel 15, the heat dissipation channel 15 is opened, and the heat dissipation fan 13 generates a directional airflow in the bottom shell 1 to dissipate the heat in the inner cavity of the bottom shell 1. When the machine is turned off, the blocking door 16 is reset, thereby pulling the brick pull rope 1 22 to rotate and close the protective shell 7. At the same time, the convergence point of the pull rope 26 and the pull rope 1 22 is reset, the pull rope 26 is relaxed, the piston 25 is reset, the negative pressure basically disappears, the fixed state is released, and the heat dissipation fan 13 and the electromagnet 19 are closed accordingly, so that the electromagnet 19 loses its magnetic field, and the blocking door 16 is subjected to the elastic force of the spring 18 to block the heat dissipation channel 15. At the same time, common tools can also be stored and fixed through the fixing component 8 in the protective shell 7.

[0079] Embodiment 2:

[0080] A control system for an audio and video device, which is built into a control mainboard 14 of an audio and video device in Embodiment 1, specifically comprises:

[0081] A power module, which supplies power to electrical components through an external power cord or a built-in charging power supply;

[0082] A signal receiving module, which is connected to the camera and the microphone 5 for communication and receives signals from the camera and the microphone 5. The signal receiving module has a built-in communication unit, and a communication connection is established with the communication device through the communication unit;

[0083] A central processing module, which receives the data from the signal receiving module and processes the data to generate control instructions;

[0084] A control module, which is controllably connected to the multi-angle adjustment mechanism 3, the display 4, the speaker 6, the radiator fan 13, and the electromagnet 19. The control module receives the control instructions from the central processing module and then controls the multi-angle adjustment mechanism 3, the display 4, the speaker 6, the radiator fan 13, and the electromagnet 19 to perform corresponding executions according to the control instructions.

[0085] The working logic of the control system includes the following steps:

[0086] S1: When starting up, the control module of the control main board 14 controls the display 4, the speaker 6, the radiator fan 13, the electromagnet 19, and the camera to start synchronously. The display 4 plays videos, the camera collects videos, the speaker 6 plays audio, the microphone 5 collects sounds, and then establishes a communication connection with an external communication device through the signal receiving module for data interaction;

[0087] S2: During the interaction process, the microphone 5 collects sound signals, and the signal receiving module collects and transmits the sounds to the central processing module for positioning, and the noise is removed after positioning;

[0088] S3: At the same time, the central processing module determines the relative position between the user and the display 4 according to the positioning information, generates control instructions according to the relative position, and then transmits them to the control module. The control module controls the display 4 to adjust the angular orientation so that the display 4 faces the speaker's position;

[0089] S4: Moreover, the central processing module determines the relative position between the user and the display 4 according to the positioning information to judge the distance between the user and the speaker 6, and then controls the volume output of the speaker 6 according to the distance between the user and the speaker 6.

[0090] In the step S2, the positioning method includes the following steps:

[0091] S21: Taking the bottom case 1 as a reference, establishing a three-dimensional space coordinate system, and determining the three-dimensional coordinates of each microphone 5 in the three-dimensional coordinate system according to the installation position of the microphone 5 relative to the bottom case 1;

[0092] S22: Arranging and combining all the microphones 5 under the condition constraint of three non-collinear microphones 5 to form n combinations, that is, each combination includes three microphones 5 and the three microphones 5 are not collinear;

[0093] S23: Arbitrarily select a combination, and record the three sensors as No. 1, No. 2, and No. 3, and obtain their coordinates as And the time sequence difference of the sound signal received by the microphone 5 or the distances Δ between the speaker's azimuth and the positions of the three sensors 12 、Δ 13 、Δ 23 which are the distance differences between No. 1 and No. 2, between No. 1 and No. 3, and between No. 2 and No. 3 respectively;

[0094] S24: Establish a joint solution model, d1, d2, and d3 are the distances from the speaker to the 1st, 2nd, and 3rd sensors respectively, where where (x′, y′, z′) are the three-dimensional coordinates of the speaker;

[0095] S25: According to the joint solution model, and repeat step S23 until all n combinations are solved to obtain the three-dimensional coordinates of n speakers;

[0096] S26: Perform data abnormality verification on the n sets of solved three-dimensional coordinates, remove abnormal data, then sum the remaining data, and take the average of the sum to obtain the final coordinates of the speaker.

[0097] In the said step S26, the method for data abnormality verification includes the following steps:

[0098] S261: Set an error threshold σ according to the accuracy of the microphone 5;

[0099] S262: Calculate the mean coordinate for the n sets of obtained solution values as

[0100] S263: If or or then discard it, otherwise keep it, x i ′, y i ′, z i ′ are the three-dimensional coordinates of the i-th result in the n sets of solution results.

[0101] In the said step S2, the method for removing noise includes the following steps:

[0102] A1: With the positioning point as the center and a preset tolerance R as the radius, establish a tolerance three-dimensional space region;

[0103] A2: Calculate the azimuths of all sound sources through the microphone 5, and remove all sound signals not within the tolerance three-dimensional space region.

[0104] In the said step S4, the adjustment logic for the volume output size includes the following steps:

[0105] S41: Obtain the human body comfortable sound intensity A through big data 1 ;

[0106] S42: Obtain the average sound intensity A of the removed noise 2 ;

[0107] S43: Then according to the formula A 1 =(A 0 -k 1 A 2 )k 2 L, obtain the volume output size A of the speaker 6 0 , where k 1 is the environmental noise influence coefficient, k 2 is the attenuation rate of sound propagation in the air, and L is the straight-line distance between the speaker's location and the speaker 6

[0108] In the present invention, the form of user positioning can make the angle of the display 4 follow, improving the use effect. And the user positioning uses the timing analysis positioning of the microphone 5. Compared with the positioning of image processing, the calculation difficulty is low and the response speed is fast. At the same time, for the positioning data, the form of multi-group data verification is used to discard the outliers, increasing the positioning accuracy. In addition, based on the positioning, the noise in other directions can be distinguished to ensure the pertinence and clarity of sound collection. On the basis of noise discrimination, the volume of the speaker 6 can also be controlled through sound attenuation and noise compensation, improving the use effect.

[0109] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. An audio and video device, comprising a bottom shell (1), a shell cover (2) fixed to the inner side of the top of the bottom shell (1), and a display (4) connected to the bottom shell (1) through a multi-angle adjustment mechanism (3), wherein a camera is arranged on the front side of the display (4), characterized in that: A control mainboard (14) is fixed inside the bottom shell (1), a speaker (6) and a rectangular array of microphones (5) are fixed on the front side of the bottom shell (1), and the display (4), microphone (5) and speaker (6) are all electrically connected to the control mainboard (14); The front side of the bottom shell (1) is rotatably connected to a protective shell (7) via a hinge shaft (21), and a fixing assembly (8) for storing tools is arranged on the inner side of the protective shell (7).

2. An audio and video device according to claim 1, characterized in that: The inner walls of the bottom shell (1) on both symmetrical sides are provided with heat dissipation channels (15), and a heat dissipation fan (13) for heat dissipation is arranged inside the heat dissipation channel (15); The inner wall of the heat dissipation channel (15) located outside the heat dissipation fan (13) is slidably connected to a plurality of blocking doors (16) in a circular array, and the plurality of blocking doors (16) can completely block or completely open the heat dissipation channel (15).

3. An audio and video device according to claim 2, characterized in that: The blocking door (16) is connected to the inner wall of the heat dissipation channel (15) through a spring (18), and a magnetic attraction block (17) is fixed to the side wall of the blocking door (16). An electromagnet (19) magnetically matched with the magnetic attraction block (17) is fixed to the inner wall of the heat dissipation channel (15) opposite to the magnetic attraction block (17), and the electromagnet (19) is connected to the power supply circuit of the heat dissipation fan (13).

4. The audio and video device according to claim 2, characterized in that: A pull rope (22) is fixed to the side wall of the blocking door (16), the other end of the pull rope (22) is connected to the side wall of the protective shell (7), and a torsion spring (20) is buckled at the hinge between the protective shell (7) and the bottom shell (1).

5. An audio and video device according to claim 4, characterized in that: The bottom of the bottom shell (1) is provided with a plurality of supporting legs (9), the supporting legs (9) located at the front side are composed of a cylinder body (23) fixed to the bottom of the bottom shell (1) and a flexible gasket (24) fixed to the bottom of the cylinder body (23), the inner wall of the flexible gasket (24) is slidably connected with a piston (25), the top of the piston (25) is fixed with a pull rope 2 (26), the other end of the pull rope 2 (26) is converged with the pull rope 1 (22), and the inner wall of the bottom shell (1) is provided with a receiving groove matching the paths of the pull rope 1 (22) and the pull rope 2 (26).

6. A control system for an audio and video device, built into a control mainboard (14) in an audio and video device according to any one of claims 1 to 5, characterized in that: include: A power module, which supplies power to electrical components through an external power cord or a built-in charging power supply; A signal receiving module, which is in communication connection with the camera and the microphone (5) and receives signals from the camera and the microphone (5); the signal receiving module is provided with a communication unit, and a communication connection is established with the communication device through the communication unit; A central processing module receives data from the signal receiving module, processes the data, and generates control instructions; A control module is connected to the multi-angle adjustment mechanism (3), the display (4), the speaker (6), the cooling fan (13), and the electromagnet (19) for controlling. The control module receives control instructions from the central processing module, and then controls the multi-angle adjustment mechanism (3), the display (4), the speaker (6), the cooling fan (13), and the electromagnet (19) to perform corresponding operations according to the control instructions.

7. The control system of an audio and video device according to claim 6, characterized in that: The working logic of the control system includes the following steps: S1: When the computer is turned on, the control module of the control mainboard (14) controls the display (4), the speaker (6), the cooling fan (13), the electromagnet (19) and the camera to start synchronously, and then establishes a communication connection with an external communication device through a signal receiving module to perform data exchange; S2: During the interaction process, the microphone (5) collects sound signals, and the signal receiving module collects the sound and transmits it to the central processing module for positioning, and removes noise after positioning; S3: At the same time, the central processing module determines the relative position of the user and the display (4) according to the positioning information, generates a control instruction according to the relative position, and transmits it to the control module, and the control module controls the display (4) to adjust the angle and position so that the display (4) faces the speaker; S4: In addition, the central processing module determines the relative position of the user and the display (4) based on the positioning information, determines the distance between the user and the speaker (6), and then controls the volume output of the speaker (6) based on the distance between the user and the speaker (6).

8. The control system of an audio and video device according to claim 7, characterized in that: In the step S2, the positioning method includes the following steps: S21: establishing a three-dimensional spatial coordinate system with the bottom shell (1) as a reference, and determining the three-dimensional coordinates of each microphone (5) in the three-dimensional coordinate system according to the installation position of the microphone (5) relative to the bottom shell (1); S22: Arrange and combine all the microphones (5) according to the condition constraint of the three microphones (5) not being on the same straight line to form n combinations; S23: Choose any combination, where the three sensors are denoted as 1, 2 and 3, and obtain their coordinates respectively. And the time difference of the sound signal received by the microphone (5) or the distance Δ between the speaker's position and the three sensor positions 12 , Δ 13 , Δ 23 , which are the distance difference between No. 1 and No. 2, the distance difference between No. 1 and No. 3, and the distance difference between No. 2 and No. 3 respectively; S24: Establish a joint solution model, d1, d2, and d3 are the distances from the speaker to sensors 1, 2, and 3, respectively. Where (x′, y′, z′) is the three-dimensional coordinate of the speaker; S25: according to the joint solution model, repeat step S23 until all n combinations are solved to obtain the three-dimensional coordinates of n speakers; S26: performing data abnormality check on the n types of solved three-dimensional coordinates, removing abnormal data, and then summing the remaining data, and averaging the sum to obtain the final coordinates of the speaker; In step S26, the method for checking data abnormality includes the following steps: S261: setting an error threshold σ according to the accuracy of the microphone (5); S262: Calculate the mean coordinates of the obtained n solution values: S263: If or or If x is not equal to 1, it is discarded, otherwise it is retained. i ′,y i ′,z i ′ is the three-dimensional coordinate of the i-th result among the n solution results.

9. The control system of an audio and video device according to claim 8, characterized in that: In the step S2, the method for removing noise comprises the following steps: A1: Establish a tolerance three-dimensional space area with the positioning point as the center and the preset tolerance R as the radius; A2: Calculate the directions of all sound sources through the microphone (5) and remove all sound signals that are not within the tolerable three-dimensional space area.

10. The control system of an audio and video device according to claim 9, characterized in that: In step S4, the volume output adjustment logic includes the following steps: S41: Obtaining human body comfortable sound intensity A1 through big data; S42: Obtain the average sound intensity A2 of the removed noise; S43: Then, the volume output size A0 of the speaker (6) is obtained according to the formula A1=(A0-k1A2)k2L, where k1 is the environmental noise influence coefficient, k2 is the attenuation rate of sound propagation in the air, and L is the straight-line distance between the speaker's location and the speaker (6).

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