CN207869265U - Audio-video collection system - Google Patents
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- CN207869265U CN207869265U CN201721921384.6U CN201721921384U CN207869265U CN 207869265 U CN207869265 U CN 207869265U CN 201721921384 U CN201721921384 U CN 201721921384U CN 207869265 U CN207869265 U CN 207869265U
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Abstract
The utility model discloses a kind of audio-video collection systems, including camera, audio collection module, audio A/D conversion modules, video acquisition module, video a/d conversion module, Data Synthesis encrypting module, microprocessor, wireless transport module, memory, loud speaker, display screen and power circuit are equipped in the camera, audio collection module collected sound signal simultaneously sends it to audio A/D conversion modules, and voice signal is converted to digital audio and video signals and is transmitted to Data Synthesis encrypting module by audio A/D conversion modules；Power circuit includes power supply, the first diode, the second diode, the first capacitance, the second capacitance, first resistor, second resistance, 3rd resistor, the 4th resistance, the first triode and the second triode.The utility model save cost, can acquire simultaneously audio-video signal, facilitate administrative staff understands whenever and wherever possible monitor situation, circuit structure is relatively simple, circuit safety and reliability is higher.
Description
Technical field
The utility model is related to signal acquisition transmission field, more particularly to a kind of audio-video collection system.
Background technology
Campus Monitoring System is mainly the monitoring of networking real-time high-definition video.It makes administrative staff that can be observed in control room
The case where to all primary locations, will be transmitted to administrative center, watch in real time in a manner of video image etc. the case where monitoring section
Member can understand the real-time condition in each place of school by master control display at any time.Campus Monitoring System can generally use camera shooting
Head carries out the acquisition of video image, when needing to acquire audio frequency apparatus, needs that audio collecting device is in addition used to carry out audio letter
Number acquisition, it is seen that need that using two equipment acquisition to video and audio could be completed, not only cost is higher in this way, uses
Also inconvenient.The image of tradition monitoring can only can just be seen in duty room, when administrative staff are not in duty room, then can't see prison
Situation is controlled, therefore monitored condition cannot be understood whenever and wherever possible.In addition, the circuit structure inside existing camera is complex,
Cost is higher, and due to lacking corresponding circuit protection function, causes the safety and reliability of circuit not high.
Utility model content
The technical problem to be solved by the present invention is to, for the drawbacks described above of the prior art, provide it is a kind of save at
This, can acquire that audio-video signal, facilitating administrative staff to understand whenever and wherever possible, to monitor situation, circuit structure relatively simple, electric simultaneously
The higher audio-video collection system of safety and reliability on road.
Technical solution adopted by the utility model to solve its technical problems is：A kind of audio-video collection system is constructed, is wrapped
Camera is included, audio collection module, audio A/D conversion modules, video acquisition module, video a/d are equipped in the camera and is turned
Block, Data Synthesis encrypting module, microprocessor, wireless transport module, memory, loud speaker, display screen and power circuit are changed the mold,
The audio collection module collected sound signal simultaneously sends it to the audio A/D conversion modules, the audio A/D moduluss of conversion
The voice signal is converted to digital audio and video signals and is transmitted to the Data Synthesis encrypting module by block, the video acquisition mould
Block acquires image data within the vision and sends it to the video a/d conversion module, the video a/d conversion module
Described image data are converted into digital video signal and are transmitted to the Data Synthesis encrypting module, the Data Synthesis encryption
Module synthesizes the digital audio and video signals and digital video signal, and is encrypted to the signal after synthesis and adds what is obtained
Ciphertext data is transmitted to the microprocessor, and the encryption data is sent to the memory and stored by the microprocessor,
The encryption data is transmitted to mobile terminal by the wireless transport module simultaneously, the microprocessor is also by the encryption
Data transmission is played out to the loud speaker and is shown with display screen, the power circuit connect with the microprocessor,
For powering；
The power circuit includes power supply, the first diode, the second diode, the first capacitance, the second capacitance, first
Resistance, second resistance, 3rd resistor, the 4th resistance, the first triode and the second triode, the power supply respectively with it is described
The anode of first diode, one end of the first capacitance, second resistance one end connected with the anode of the second diode, described first
The other end of the cathode of diode and the first capacitance is grounded, the other end of the second resistance respectively with the 3rd resistor
One end is connected with the base stage of the second triode, and the cathode of second diode passes through the first resistor and the two or three pole
The emitter of pipe connects, the other end of the 3rd resistor respectively with the collector of first triode, the first triode
Base stage is connected with one end of the second capacitance, the emitter ground connection of first triode, the collector point of second triode
It is not connect with one end of the other end of second capacitance and the 4th resistance, the other end of the 4th resistance ground connection, described the
The resistance value of the model S-701 of two diodes, the 4th resistance are 8k Ω.
In audio-video collection system described in the utility model, the power circuit further includes third capacitance, and described
One end of three capacitances is connect with the base stage of the other end of the second resistance and the second triode, the capacitance of the third capacitance
For 560pF.
In audio-video collection system described in the utility model, the power circuit further includes the 5th resistance, and described
One end of five resistance is connect with the base stage of first triode, the other end of the 5th resistance and the one of second capacitance
The resistance value of end connection, the 5th resistance is 10k Ω.
In audio-video collection system described in the utility model, the audio A/D conversion modules include analog power, number
Word power supply, the first photoelectrical coupler, the second photoelectrical coupler, the 8th resistance, the 9th resistance and the 8th capacitance, first photoelectricity
The anode of light emitting diode is connect with one end of the analog power and the 8th resistance respectively in coupler, the first photoelectricity coupling
The cathode of light emitting diode is connect with the other end of the 8th resistance, one end of the 9th resistance and simulation respectively in clutch,
The anode of light emitting diode is connect with the other end of the analog power and the 9th resistance respectively in second photoelectrical coupler,
The cathode of light emitting diode connects simulation ground in second photoelectrical coupler, photosensitive three pole in first photoelectrical coupler
The collector of pipe is connect with the digital power, the emitter of phototriode and the described 8th in first photoelectrical coupler
One end of capacitance connects, another termination of the 8th capacitance digitally, phototriode in second photoelectrical coupler
Collector connect it is described digitally, in second photoelectrical coupler emitter of phototriode connect it is described digitally, described the
The capacitance of eight capacitances is 450pF.
In audio-video collection system described in the utility model, the audio A/D conversion modules further include the five or two pole
Pipe, the anode of the 5th diode are connect with one end of the 9th resistance, described in the cathode connection of the 5th diode
Simulation ground, the model E-501 of the 5th diode.
In audio-video collection system described in the utility model, the audio A/D conversion modules further include the tenth resistance,
One end of tenth resistance is connect with the other end of the 8th resistance, the other end of the tenth resistance and the 9th electricity
One end of resistance connects, and the resistance value of the tenth resistance is 15k Ω.
In audio-video collection system described in the utility model, the audio A/D conversion modules further include the 11st electricity
Resistance, one end of the eleventh resistor are connect with the cathode of light emitting diode in second photoelectrical coupler, and the described 11st
The other end of resistance is connect with the simulation, and the resistance value of the eleventh resistor is 26k Ω.
In audio-video collection system described in the utility model, the wireless transport module is bluetooth module, WIFI moulds
Block, CDMA module, WCDMA modules, gsm module, GPRS module, Zigbee module or LoRa modules.
The audio-video collection system for implementing the utility model, has the advantages that：Due to being equipped with audio in camera
Acquisition module, audio A/D conversion modules, video acquisition module, video a/d conversion module, Data Synthesis encrypting module, microprocessor
Device, wireless transport module, memory, loud speaker, display screen and power circuit, camera can not only acquire vision signal,
Audio signal can be acquired, cost can be saved in this way, increases the convenience used, encryption data is transmitted by wireless transport module
To mobile terminal, administrative staff can be thus facilitated to understand monitoring situation whenever and wherever possible, power circuit includes power supply, first
Diode, the second diode, the first capacitance, the second capacitance, first resistor, second resistance, 3rd resistor, the 4th resistance, first
Triode and the second triode, for the power circuit relative to traditional power module, the component used is less, in this way can be with
Hardware cost is reduced, the second diode is used for the collector current to the second triode for carrying out current-limiting protection, the 4th resistance
Current-limiting protection is carried out, therefore saves cost, audio-video signal can be acquired simultaneously, administrative staff is facilitated to understand monitoring feelings whenever and wherever possible
Condition, circuit structure are relatively simple, circuit safety and reliability is higher.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the structural schematic diagram of camera in the utility model audio-video collection system one embodiment；
Fig. 2 is the circuit diagram of power circuit in the embodiment；
Fig. 3 is the circuit diagram of the embodiment sound intermediate frequency A/D conversion modules.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
In the utility model audio-video collection system embodiment, which includes camera, the camera shooting
The structural schematic diagram of head is as shown in Figure 1.It is equipped with audio collection module 1 in Fig. 1, in the camera, audio A/D conversion modules 2, regards
Frequency acquisition module 3, video a/d conversion module 4, Data Synthesis encrypting module 5, microprocessor 6, wireless transport module 7, memory
8, loud speaker 9, display screen 10 and power circuit 11, wherein 1 collected sound signal of audio collection module simultaneously sends it to audio
Voice signal is converted to digital audio and video signals and sends it to Data Synthesis by A/D conversion modules 2, audio A/D conversion modules 2
Encrypting module 5, video acquisition module 3 acquire image data within the vision and are transmitted video a/d conversion module 4, depending on
Image data is converted to digital video signal and is transmitted to Data Synthesis encrypting module 5, Data Synthesis by frequency A/D conversion modules 4
Encrypting module 5 synthesizes digital audio and video signals and digital video signal, and is encrypted and will obtain to the signal after synthesis
Encryption data is transmitted to microprocessor 6, when being synthesized to digital audio and video signals and digital video signal, may be used existing
Some Encryption Algorithm in the prior art may be used when being encrypted for composition algorithm in technology.Microprocessor 6 will be encrypted
Data are sent to memory 8 and are stored, while encryption data is transmitted to mobile terminal by wireless transport module 7, mobile
Terminal can be smart mobile phone, tablet computer or PDA etc..Encryption data is also transmitted to loud speaker 9 and broadcast by microprocessor 6
It puts, is transmitted to display screen 10 and is shown, that is, play courseware of giving lessons, power circuit 11 is connect with microprocessor 6, for supplying
Electricity.As it can be seen that the camera not only has the function of video acquisition, also there is audio collection and playing function, which can be simultaneously
Audio-video signal is acquired, audio collection device is eliminated, cost can be reduced in this way, while also increasing the convenience used.
It is noted that above-mentioned wireless transport module 7 can be bluetooth module, WIFI module, CDMA module, WCDMA
Module, gsm module, GPRS module, Zigbee module or LoRa modules etc..By the way that a variety of wireless transmission methods, Ke Yiman is arranged
The demand of sufficient different user increases the flexibility used.When in particular by LoRa modules, the distance of transmission farther out, and communicates
Performance is relatively stable, is suitable for the higher occasion of QoS requirement.In practical applications, user can be according to their needs
Flexibly select corresponding wireless transmission method.Encryption data is transmitted to mobile terminal by wireless transport module 7, thus side
Just administrative staff understand monitoring situation whenever and wherever possible.
Fig. 2 is the circuit diagram of power circuit in the present embodiment, and in Fig. 2, which includes power supply
VCC, the first diode D1, the second diode D2, the first capacitance C1, the second capacitance C2, first resistor R1, second resistance R2,
Three resistance R3, the 4th resistance R4, the first triode Q1 and the second triode Q2, wherein power supply VCC respectively with the one or two pole
The anode of pipe D1, one end of the first capacitance C1, second resistance R2 one end connected with the anode of the second diode D2, the one or two pole
The other end of the cathode of pipe D1 and the first capacitance C1 are grounded GND, and the other end of second resistance R2 is respectively with 3rd resistor R3's
One end is connected with the base stage of the second triode Q2, and the cathode of the second diode Q2 passes through first resistor R1's and the second triode Q2
Emitter connects, the other end of 3rd resistor R3 respectively with the collector of the first triode Q1, the first triode Q1 base stage and
One end of second capacitance C2 connects, and the emitter of the first triode Q1 is grounded GND, and the collector of the second triode Q2 is respectively with the
One end connection of the other end and the 4th resistance R4 of two capacitance C2, the other end ground connection of the 4th resistance R4.
The power circuit 11 is relative to traditional power module, and the component used is less, and circuit structure is relatively simple,
Hardware cost can be reduced in this way.In addition, the second diode D2 is Current Limiting Diodes, for the second triode Q2 and power supply electricity
Branch between the VCC of source carries out current-limiting protection, therefore the safety and reliability of circuit is higher.It is noted that this implementation
In example, the resistance value of the model S-701, the 4th resistance R4 of the second diode D2 are 8k Ω, certainly, in practical applications, second
Diode D2 can also select other models to have the diode of similar functions, and the resistance value of the 4th resistance R4 can be according to specific feelings
Condition adjusts accordingly.
It is used to power supply VCC carrying out direct current to filter out using the first capacitance C1, avoids influence of the direct current to circuit, first
Diode D1 can be to avoid super-high-current to subsequent conditioning circuit influence, protect subsequent conditioning circuit.
In the present embodiment, which further includes third capacitance C3, one end and the second resistance R2 of third capacitance C3
The other end and the second triode Q2 base stage connection.Third capacitance C3 be coupled capacitor, for prevent the first triode Q1 with
Interference between second triode Q2, to further enhance the safety and reliability of circuit.It is noted that the present embodiment
In, the capacitance of third capacitance C3 is 560pF, and certainly, in practical applications, the capacitance of third capacitance C3 can be according to specific
Situation adjusts accordingly.
In the present embodiment, which further includes the 5th resistance R5, one end and the first triode of the 5th resistance R5
The base stage of Q1 connects, and the other end of the 5th resistance R5 is connect with one end of the second capacitance C2.5th resistance R5 is current-limiting resistance, is used
Current-limiting protection is carried out in the base current to the first triode Q1, further to enhance the safety and reliability of circuit.Value
One is obtained to be mentioned that, in the present embodiment, the resistance value of the 5th resistance R5 is 10k Ω, certainly, in practical applications, the 5th resistance R5's
Resistance value can adjust accordingly as the case may be.
Fig. 3 is the circuit diagram of the present embodiment sound intermediate frequency A/D conversion modules, and in Fig. 3, the audio A/D conversion modules 2 wrap
Include analog power VDD, digital power VEE, the first photoelectrical coupler U1, the second photoelectrical coupler U2, the 8th resistance R8, the 9th electricity
Hinder R9 and the 8th capacitance C8, wherein in the first photoelectrical coupler U1 the anode of light emitting diode respectively with analog power VDD and the
One end of eight resistance R8 connects, and the cathode of light emitting diode is another with the 8th resistance R8 respectively in the first photoelectrical coupler U1
End, the 9th resistance R9 one end with simulation ground DGND connect, in the second photoelectrical coupler U2 the anode of light emitting diode respectively with
The other end of analog power VEE and the 9th resistance R9 connect, and the cathode of light emitting diode connects simulation in the second photoelectrical coupler U2
The collector of phototriode is connect with digital power VEE in ground EGND, the first photoelectrical coupler U1, the first photoelectrical coupler U1
The emitter of middle phototriode is connect with one end of the 8th capacitance C8, another termination of the 8th capacitance C8 digitally EGND, and
The collector of phototriode meets digitally DGND in two photoelectrical coupler U2, phototriode in the second photoelectrical coupler U2
Emitter meets digitally DGND.
For frequency A/D conversion modules 2 relative to traditional A/D converter circuit, the component used is less, circuit structure compared with
To be simple, hardware cost can be reduced in this way.In addition, the 8th capacitance C8 is coupled capacitor, for preventing the first photoelectrical coupler
Interference between U1 and the second photoelectrical coupler U2, further to enhance the safety and reliability of circuit.It is worth mentioning
It is that in the present embodiment, the capacitance of the 8th capacitance C8 is 450pF, certainly, in practical applications, the capacitance of the 8th capacitance C8
It can adjust accordingly as the case may be.
It is noted that the voltage that above-mentioned analog power VDD is provided is+25V, the voltage that digital power VEE is provided is+
3.3V.Frequency A/D conversion modules 2 utilize the first photoelectrical coupler U1 and the second lower spy of photoelectrical coupler U2 conducting voltages
Point, when ground DGND is simulated in input, the first photoelectrical coupler U1 and the second photoelectrical coupler U2 conductings, conducting electric current are about
1.3mA, to which the first photoelectrical coupler U1 and the second photoelectrical coupler U2 export digitally EGND.
In the present embodiment, the audio A/D conversion modules 2 further include the 5th diode D5, the anode of the 5th diode D5 with
One end of 9th resistance R9 connects, the cathode connection simulation ground of the 5th diode D5.5th diode D5 is Current Limiting Diodes, is used
Current-limiting protection is carried out in the branch between the second photoelectrical coupler U2 and simulation ground DGND, to further enhance current limitation effect.
It is noted that in the present embodiment, the model E-501 of the 5th diode D5, certainly, in practical applications, the five or two pole
Pipe D5 can also use diode of other models with similar functions.
In the present embodiment, the audio A/D conversion modules 2 further include the tenth resistance R10, one end of the tenth resistance R10 and the
The other end of eight resistance R8 connects, and the other end of the tenth resistance R10 is connect with one end of the 9th resistance R9.Tenth resistance R10 is
Current-limiting resistance carries out current-limiting protection, with more for the branch between the first photoelectrical coupler U1 and the second photoelectrical coupler U2
Further enhance current limitation effect.It is noted that in the present embodiment, the resistance value of the tenth resistance R10 is 15k Ω, certainly, in reality
In the application of border, the resistance value of the tenth resistance R10 can also adjust accordingly as the case may be.
In the present embodiment, the audio A/D conversion modules 2 further include eleventh resistor R11, one end of eleventh resistor R11
It is connect with the cathode of light emitting diode in the second photoelectrical coupler U2, the other end of eleventh resistor R11 is connect with simulation.The
11 resistance R11 are current-limiting resistance, for carrying out current-limiting protection to the second photoelectrical coupler U2, to further enhance current limliting effect
Fruit.It is noted that in the present embodiment, the resistance value of eleventh resistor R11 is 26k Ω, certainly, in practical applications, the tenth
The resistance value of one resistance R11 can also adjust accordingly as the case may be.
In the present embodiment, the circuit structure of the circuit structure of video a/d conversion module 4 and above-mentioned audio A/D conversion modules 2
It is identical.
In short, in the present embodiment, which can acquire audio-video signal simultaneously, eliminate audio collection device, in this way may be used
To reduce cost, while also increase the convenience used.Encryption data is transmitted to mobile terminal by wireless transport module 7,
Administrative staff are thus facilitated to understand monitoring situation whenever and wherever possible.In addition, the power circuit 11 is relative to traditional power module,
The component that it is used is less, and circuit structure is relatively simple, can reduce hardware cost in this way.Limit is equipped in the power circuit 11
Diode and current-limiting resistance are flowed, therefore the safety and reliability of circuit is higher.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (8)
1. a kind of audio-video collection system, which is characterized in that be equipped with including camera, in the camera audio collection module,
Audio A/D conversion modules, video acquisition module, video a/d conversion module, Data Synthesis encrypting module, microprocessor, wireless biography
Defeated module, memory, loud speaker, display screen and power circuit, the audio collection module collected sound signal are simultaneously transmitted
To the audio A/D conversion modules, the voice signal is converted to digital audio and video signals and passed by the audio A/D conversion modules
It is sent to the Data Synthesis encrypting module, the video acquisition module acquires image data within the vision and sends it to
Described image data are converted to digital video signal and transmitted by the video a/d conversion module, the video a/d conversion module
To the Data Synthesis encrypting module, the Data Synthesis encrypting module closes the digital audio and video signals and digital video signal
At, and the signal after synthesis is encrypted and obtained encryption data is transmitted to the microprocessor, the microprocessor
The encryption data is sent to the memory to store, while the encryption data is passed through into the wireless transport module
Be transmitted to mobile terminal, the microprocessor also by the encryption data be transmitted to the loud speaker play out with display screen into
Row display, the power circuit are connect with the microprocessor, for powering；
The power circuit includes power supply, the first diode, the second diode, the first capacitance, the second capacitance, the first electricity
Resistance, second resistance, 3rd resistor, the 4th resistance, the first triode and the second triode, the power supply is respectively with described
The anode of one diode, one end of the first capacitance, second resistance one end connected with the anode of the second diode, the described 1st
The other end of the cathode of pole pipe and the first capacitance is grounded, the other end of the second resistance respectively with the 3rd resistor one
End is connected with the base stage of the second triode, and the cathode of second diode passes through the first resistor and second triode
Emitter connection, the other end of the 3rd resistor respectively with the collector of first triode, the base of the first triode
Pole is connected with one end of the second capacitance, the emitter ground connection of first triode, the collector difference of second triode
It is connect with one end of the other end of second capacitance and the 4th resistance, the other end ground connection of the 4th resistance, described second
The resistance value of the model S-701 of diode, the 4th resistance are 8k Ω.
2. audio-video collection system according to claim 1, which is characterized in that the power circuit further includes third electricity
Hold, one end of the third capacitance is connect with the base stage of the other end of the second resistance and the second triode, the third electricity
The capacitance of appearance is 560pF.
3. audio-video collection system according to claim 2, which is characterized in that the power circuit further includes the 5th electricity
Resistance, one end of the 5th resistance connect with the base stage of first triode, the other end of the 5th resistance and described the
One end of two capacitances connects, and the resistance value of the 5th resistance is 10k Ω.
4. the audio-video collection system according to claims 1 to 3 any one, which is characterized in that the audio A/D conversions
Module includes analog power, digital power, the first photoelectrical coupler, the second photoelectrical coupler, the 8th resistance, the 9th resistance and
Eight capacitances, the anode of light emitting diode one end with the analog power and the 8th resistance respectively in first photoelectrical coupler
Connection, the cathode of the light emitting diode other end, the 9th resistance with the 8th resistance respectively in first photoelectrical coupler
One end and the connection of simulation ground, in second photoelectrical coupler anode of light emitting diode respectively with the analog power and the
The other ends of nine resistance connects, in second photoelectrical coupler cathode of light emitting diode with connecing the simulation, described first
The collector of phototriode is connect with the digital power in photoelectrical coupler, photosensitive three pole in first photoelectrical coupler
The emitter of pipe is connect with one end of the 8th capacitance, another termination of the 8th capacitance digitally, second photoelectricity
In coupler the collector of phototriode connect it is described digitally, the emitter of phototriode in second photoelectrical coupler
Described in connecing digitally, the capacitance of the 8th capacitance is 450pF.
5. audio-video collection system according to claim 4, which is characterized in that the audio A/D conversion modules further include
The anode of 5th diode, the 5th diode is connect with one end of the 9th resistance, the cathode of the 5th diode
Connect the simulation ground, the model E-501 of the 5th diode.
6. audio-video collection system according to claim 5, which is characterized in that the audio A/D conversion modules further include
One end of tenth resistance, the tenth resistance is connect with the other end of the 8th resistance, the other end of the tenth resistance with
One end of 9th resistance connects, and the resistance value of the tenth resistance is 15k Ω.
7. audio-video collection system according to claim 6, which is characterized in that the audio A/D conversion modules further include
Eleventh resistor, one end of the eleventh resistor are connect with the cathode of light emitting diode in second photoelectrical coupler, institute
The other end for stating eleventh resistor is connect with the simulation, and the resistance value of the eleventh resistor is 26k Ω.
8. the audio-video collection system according to claims 1 to 3 any one, which is characterized in that the wireless transmission mould
Block is bluetooth module, WIFI module, CDMA module, WCDMA modules, gsm module, GPRS module, Zigbee module or LoRa moulds
Block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721921384.6U CN207869265U (en) | 2017-12-28 | 2017-12-28 | Audio-video collection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721921384.6U CN207869265U (en) | 2017-12-28 | 2017-12-28 | Audio-video collection system |
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| CN207869265U true CN207869265U (en) | 2018-09-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108024099A (en) * | 2017-12-28 | 2018-05-11 | 广州爱易学智能信息科技有限公司 | Audio-video collection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108024099A (en) * | 2017-12-28 | 2018-05-11 | 广州爱易学智能信息科技有限公司 | Audio-video collection system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |