CN109302577A - Video conferencing system - Google Patents
Video conferencing system Download PDFInfo
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- CN109302577A CN109302577A CN201811174309.7A CN201811174309A CN109302577A CN 109302577 A CN109302577 A CN 109302577A CN 201811174309 A CN201811174309 A CN 201811174309A CN 109302577 A CN109302577 A CN 109302577A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/1813—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast for computer conferences, e.g. chat rooms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
Abstract
The invention discloses a kind of video conferencing systems, including power module, voice collection device, photographic device, microprocessor, multi-screen processor, display screen, Cloud Server, wireless communication module, mobile terminal and public address set, power module, voice collection device, photographic device, multi-screen processor and public address set are connect with microprocessor, display screen is connect with multi-screen processor, microprocessor is communicated by network with Cloud Server, and module is connect microprocessor with the mobile terminal by wireless communication；Power module includes voltage input end, first capacitor, first resistor, the 7th resistance, the first triode, second resistance, the second triode, third transistor, 3rd resistor, the first inductance, the second capacitor, the 4th resistance, the 5th resistance, the first zener diode, the 4th triode, the 6th resistance and voltage output end.Circuit structure of the present invention is relatively simple, cost is relatively low, maintain easily, the safety and reliability of circuit is higher.
Description
Technical field
The present invention relates to video conference field, in particular to a kind of video conferencing system.
Background technique
Video conferencing system, also known as TV conference system, this refers to the individual or group of two or more different places
Body, by sound, image and document data mutual transmission, realizes the communication immediately and interacted by transmission line and multimedia equipment, with
Realize the system equipment of teleconference.The use of video conference is somewhat like phone, in addition to that can see the people to converse with you and progress
Outside communication, moreover it is possible to which the expression and movement for seeing them make the people in different places just as linking up in same meeting room.
The component that the power pack of traditional video conference system uses is more, and circuit structure is complicated, and hardware cost is higher, it has not been convenient to tie up
Shield.In addition, since the power pack of traditional video conference system lacks corresponding circuit protection function, such as: current-limiting protection function
Can, cause the safety and reliability of circuit poor.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, provide a kind of circuit structure compared with
For simple, cost is relatively low, maintains easily, the higher video conferencing system of the safety and reliability of circuit.
The technical solution adopted by the present invention to solve the technical problems is: constructing a kind of video conferencing system, including power supply
Module, voice collection device, photographic device, microprocessor, multi-screen processor, display screen, Cloud Server, wireless communication module,
Mobile terminal and public address set, the power module, voice collection device, photographic device, multi-screen processor and public address set are equal
Connect with the microprocessor, the display screen is connect with the multi-screen processor, the microprocessor by network with it is described
Cloud Server communication, the microprocessor are connect by the wireless communication module with the mobile terminal, the sound collection
Device includes wireless session host and multiple microphones, and multiple microphones are connect with the input terminal of the wireless session host,
The output end of the wireless session host is connect with the microprocessor, and the photographic device includes being arranged in meeting room difference position
The multiple cameras set, the display screen are liquid crystal-spliced display wall, and the public address set includes that main public address set and back court are mended
Acoustic device, the main public address set include two sound equipments being distributed at left and right sides of the display screen, and the back court mends acoustic device
Including more ceiling sound equipments；
The power module includes voltage input end, first capacitor, first resistor, the 7th resistance, the first triode, second
Resistance, the second triode, third transistor, 3rd resistor, the first inductance, the second capacitor, the 4th resistance, the 5th resistance, first
Zener diode, the 4th triode, the 6th resistance and voltage output end, the voltage input end respectively with the 7th resistance
One end is connected with the emitter of the second triode, the other end of the 7th resistance respectively with the anode of the first capacitor and the
One end of one resistance connects, the cathode ground connection of the first capacitor, and the other end of the first resistor is respectively with the described 1st
The collector of pole pipe is connected with the base stage of third transistor, the base stage of first triode respectively with the second resistance one
The collector connection at end, the anode of the first zener diode and the 4th triode, the emitter and second of first triode
The other end of resistance is grounded, and the emitter of first triode is grounded by the 3rd resistor, second triode
Base stage connect with the collector of the third transistor, one end of the collector of second triode and first inductance
Connection, the other end of first inductance respectively with the anode of second capacitor, one end of the 5th resistance, the 4th triode
One end of emitter and the 6th resistance connection, second capacitor cathode ground connection, the other end of the 5th resistance respectively with
One end of 4th resistance is connected with the cathode of the first zener diode, the other end of the 4th resistance ground connection, and described the
The other end of six resistance is connect with the anode of the voltage output end and the second diode respectively, the cathode of second diode
It is connect with the base stage of the 4th triode, the resistance value of the 7th resistance is 37k Ω, the model S- of second diode
202T。
In video conferencing system of the present invention, the power module further includes third capacitor, the third capacitor
One end connect with the base stage of second triode, the collector of the other end of the third capacitor and the third transistor
Connection, the capacitance of the third capacitor are 390pF.
In video conferencing system of the present invention, the power module further includes the 8th resistance, the 8th resistance
The anode of one end and second capacitor connect, the other end of the 8th resistance and the emitter company of the 4th triode
It connects, the resistance value of the 8th resistance is 48k Ω.
In video conferencing system of the present invention, the power module further includes the 4th capacitor, the 4th capacitor
One end connect with the collector of first triode, the base stage of the other end of the 4th capacitor and the third transistor
Connection, the capacitance of the 4th capacitor are 460pF.
In video conferencing system of the present invention, the power module further includes the 9th resistance, the 9th resistance
One end connect with the base stage of first triode, the other end of the 9th resistance respectively with first zener diode
Anode and the 4th triode collector connection, the resistance value of the 9th resistance is 29k Ω.
In video conferencing system of the present invention, first triode and third transistor are three pole of NPN type
Pipe.
In video conferencing system of the present invention, second triode and the 4th triode are three pole of positive-negative-positive
Pipe.
In video conferencing system of the present invention, the wireless communication module is bluetooth module, WIFI module, GSM
Module, GPRS module, CDMA module, CDMA2000 module, WCDMA module, TD-SCDMA module, Zigbee module or LoRa mould
Block.
Implement video conferencing system of the invention, has the advantages that due to being equipped with power module, sound collection fills
It sets, photographic device, microprocessor, multi-screen processor, display screen, Cloud Server, wireless communication module, mobile terminal and the dress that amplifies
It sets, power module includes voltage input end, first capacitor, first resistor, the 7th resistance, the first triode, second resistance, second
Triode, third transistor, 3rd resistor, the first inductance, the second capacitor, the 4th resistance, the 5th resistance, two pole of the first pressure stabilizing
Pipe, the 4th triode, the 6th resistance and voltage output end, power supply of the power module relative to traditional video conference system
Point, the component used is less, due to saving some components, hardware cost can be reduced in this way, in addition, the 7th resistance
Current-limiting protection is carried out for the base stage current limliting of the collector current to the first triode and third transistor, the second diode is used for
Current-limiting protection is carried out to the base current of the 4th triode, therefore circuit structure is relatively simple, cost is relatively low, maintains easily, electricity
The safety and reliability on road is higher.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram in video conferencing system one embodiment of the present invention；
Fig. 2 is the circuit diagram of power module in the embodiment.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In video conferencing system embodiment of the present invention, the structural schematic diagram of the video conferencing system is as shown in Figure 1.Fig. 1
In, the video conferencing system include power module 1, voice collection device 2, photographic device 3, microprocessor 4, multi-screen processor 5,
Display screen 6, Cloud Server 7, wireless communication module 8, mobile terminal 9 and public address set 10, power module 1, voice collection device
2, photographic device 3, multi-screen processor 5 and public address set 10 are connect with microprocessor 4, and display screen 6 and multi-screen processor 5 connect
It connects, microprocessor 4 is communicated by network with Cloud Server 7, and module 8 and mobile terminal 9 connect microprocessor 4 by wireless communication
It connects.
Specifically, module 8 is sent to mobile terminal 9 to the information of the processing of microprocessor 4 by wireless communication, guarantee meeting
Content is able to carry out long-range transmitting, and photographic device 3 is monitored meeting-place, and the information of monitoring passes to microprocessor 4, micro process
Device 4 is analyzed and processed information, and control multi-screen processor 5 carries out split screen processing to information, and information that treated passes through display
Screen 6 is shown.Display screen 6 is liquid crystal-spliced display wall, which is modular construction, liquid crystal-spliced display
Wall is fixed on the side of wall by mounting bracket, and the interval of liquid crystal-spliced display wall and wall is greater than 52 centimetres, convenient to overhaul
Personnel behind trouble shooting can repair change without tearing screen open in access path, can greatly reduce under normal circumstances
Repair time, so result of ventilating heat dissipation is relatively good, keeps the performance of large-size screen monitors more stable since space is larger.
In the present embodiment, above-mentioned wireless communication module 8 is bluetooth module, WIFI module, gsm module, GPRS module, CDMA
Module, CDMA2000 module, WCDMA module, TD-SCDMA module, Zigbee module or LoRa module.By the way that a variety of nothings are arranged
Line communication mode can not only increase the flexibility of communication, moreover it is possible to meet the needs of different user and different occasions.
When in particular by LoRa module, farther out, and communication performance is relatively stable for communication distance, be suitable for QoS requirement compared with
High occasion.Above-mentioned mobile terminal is smart phone, tablet computer or PDA etc..
In the present embodiment, voice collection device 2 includes wireless session host and multiple microphone (not shown)s, this is multiple
Microphone is connect with the input terminal of wireless session host, and the output end of wireless session host is connect with microprocessor 4.Wireless session
Host is the important bridge for realizing the video conferencing system and conference device, and a microphone is chairman's speech microphone, other microphones
To represent microphone of making a speech, it is reasonably distributed, the speech of meeting is made to become more orderly.
In the present embodiment, photographic device 3 includes multiple camera (not shown)s that meeting room different location is arranged in,
If the number of camera is three, then a wherein camera can be distributed in the front of meeting room, in addition taken the photograph for two
As head is respectively distributed at three to four people of conference table leading portion and the dead astern of meeting room, for acquiring conference table front end two sides people
Object direct picture and controllers monitor meeting-place picture, are reasonably distributed, convenient for carrying out overall monitor to meeting-place.
In the present embodiment, public address set 10 includes main public address set and back court mends acoustic device (not shown), and master amplifies
Device includes two sound equipments being distributed at left and right sides of display screen, and it includes more ceiling sound equipments that back court, which mends acoustic device,.If ceiling
The number of sound equipment is four, then this four ceiling sound equipments can be arranged in a row, and main public-address system and back court are mended acoustic device and can be expired
Sound requirement is built in the different meeting of foot, so that conference content is clearly transmitted, can be greatly improved the quality of meeting.
Microprocessor 4 processing information be stored in Cloud Server 7, the storage of Cloud Server 7 is larger, storage capacity compared with
By force, conference content is carried out convenient for staff whole, to carry out to conference content perfect, meeting can be greatly improved in this way
Quality.
In the present embodiment, microprocessor 4 controls wireless communication module 8, multi-screen processor 5, display screen 6, sound equipment, ceiling sound
Sound, camera, wireless session host, microphone and Cloud Server 7 are method commonly used in the prior art, and no longer large fierce dog is stated here.
When in use, photographic device 3 is acquired conference content, and the information of acquisition passes to wireless session host, nothing
Line conference host carries out conversion process to information, and the information of processing passes to microprocessor 4, and microprocessor 4 divides information
Analysis processing carries out diffusion of information by public address set 10, and photographic device 3 is monitored meeting-place, and the information of monitoring passes to micro-
Processor 4, microprocessor 4 are analyzed and processed information, and control multi-screen processor 5 carries out split screen processing to information, processing
Information is shown that module 8 is sent to mobile terminal 9 to the information of the processing of microprocessor 4 by wireless communication by display screen 6,
The information of the processing of microprocessor 4 is stored in Cloud Server 7.
Voice collection device 2 and photographic device 3 are acquired the image information and acoustic information at meeting scene, information
Acquisition comprehensively, is reasonably distributed, and convenient for the Methodistic progress in meeting scene, be can guarantee that meeting can smoothly be carried out, is taken by cloud
Business device 7 records conference content, convenient for arranging to conference content, to enhance the reception and registration effect of conferencing information.
In the present embodiment, power module 1 is connect, for powering with microprocessor 2, the circuit diagram of the power module 1
As shown in Figure 2.In Fig. 2, which includes voltage input end Vin, first capacitor C1, first resistor R1, the 7th resistance
R7, the first triode Q1, second resistance R2, the second triode Q2, third transistor Q3,3rd resistor R3, the first inductance L1,
Two capacitor C2, the 4th resistance R4, the 5th resistance R5, the first zener diode D1, the 4th triode Q4, the 6th resistance R6 and voltage
Output end vo, voltage input end Vin are connect with the emitter of one end of the 7th resistance R7 and the second triode Q2 respectively, the 7th electricity
The other end for hindering R7 is connect with one end of the anode of first capacitor C1 and first resistor R1 respectively, and the cathode of first capacitor C1 connects
Ground, the other end of first resistor R1 are connect with the base stage of the collector of the first triode Q1 and third transistor Q3 respectively, and first
The base stage of the triode Q1 collection with one end of second resistance R2, the anode of the first zener diode D1 and the 4th triode Q4 respectively
Electrode connection, the emitter of the first triode Q1 and the other end of second resistance R2 are grounded, the emitter of the first triode Q1
It is grounded by 3rd resistor R3, the base stage of the second triode Q2 is connect with the collector of third transistor Q3, the second triode Q2
Collector connect with one end of the first inductance L1, the other end of the first inductance L1 respectively with the anode of the second capacitor C2, the 5th
One end of one end of resistance R5, the emitter of the 4th triode Q4 and the 6th resistance R6 connects, the cathode ground connection of the second capacitor C2,
The other end of 5th resistance R5 is connect with the cathode of one end of the 4th resistance R4 and the first zener diode D1 respectively, the 4th resistance
The other end of R4 is grounded, and the other end of the 6th resistance R6 is connect with the anode of voltage output end Vo and the second diode D2 respectively,
The cathode of second diode D2 is connect with the base stage of the 4th triode Q4.
The power pack of the power module 1 relative to traditional video conference system, the component used is less, circuit knot
Structure is relatively simple, maintains easily, and due to saving some components, can reduce hardware cost in this way.In addition, the 7th resistance R7
For current-limiting resistance, the base stage current limliting for collector current and third transistor Q3 to the first triode Q1 carries out current limliting guarantor
Shield, the second diode D2 are Current Limiting Diodes, carry out current-limiting protection, therefore circuit for the base current to the 4th triode Q4
Safety and reliability it is higher.It is noted that the resistance value of the 7th resistance R7 is 37k Ω, the two or two pole in the present embodiment
The model S-202T of pipe D2, certainly, in practical applications, the resistance value of the 7th resistance R7 can carry out accordingly as the case may be
Adjustment, that is, the resistance value of the 7th resistance R7 can be increased accordingly or be reduced as the case may be, and the second diode D2 can
To have the diode of similar functions using other models.
The working principle of the power module 1 is as follows: at the t0 moment, the second triode Q2 is connected, and voltage passes through the first inductance
L1 reaches voltage output end Vo (being in the present embodiment+14V output point), and at this moment the first inductance L1 can generate slow electric current and rise
Process, when the voltage of voltage output end Vo is greater than breakdown voltage (the present embodiment 9V) of the first zener diode D1, first
Zener diode D1 reverse-conducting causes the first triode Q1 to be connected；Also third transistor Q3 is ended, third transistor Q3 is cut
The second triode Q2 is only caused to end.Second triode Q2 cut-off, the first inductance L1 pass through the first zener diode D1 and first
Triode Q1 carries out electric discharge until the first zener diode D1 ends, from face one pressure stabilizing period of completion.
It can thus be seen that as long as the pressure stabilizing value for changing the first zener diode D1 changes voltage output end Vo's
Output voltage, output voltage 14V.All elements of the power module 1 are all common component triode or inductance, to element
Requirement be mainly pressure voltage be more than maximum output voltage.The feedback model of the power module 1 be negative-feedback, reaction speed compared with
Fastly, precision is higher.
In the present embodiment, the first triode Q1 and third transistor Q3 are NPN type triode, the second triode Q2 and
Four triode Q4 are PNP type triode.Certainly, in practical applications, the first triode Q1 and third transistor Q3 can also be with
It is all made of PNP type triode, the second triode Q2 and the 4th triode Q4 can also be all made of NPN type triode, but at this moment electric
The structure on road also will accordingly change.
In the present embodiment, which further includes third capacitor C3, one end of third capacitor C3 and the second triode Q2
Base stage connection, the other end of third capacitor C3 connect with the collector of third transistor Q3.Third capacitor C3 is coupled capacitor,
For preventing the interference between the second triode Q2 and third transistor Q3, to further enhance the safety of circuit and reliable
Property.It is noted that the capacitance of third capacitor C3 is 390pF in the present embodiment, certainly, in practical applications, third electricity
The capacitance for holding C3 can adjust accordingly as the case may be, that is, the capacitance of third capacitor C3 can be according to specific
Situation is increased accordingly or is reduced.
In the present embodiment, which further includes the 8th resistance R8, and one end of the 8th resistance R8 is with the second capacitor C2's
Anode connection, the other end of the 8th resistance R8 are connect with the emitter of the 4th triode Q4.8th resistance R8 is current-limiting resistance, is used
Current-limiting protection is carried out in the emitter current to the 4th triode Q4, further to enhance the safety and reliability of circuit.
It is noted that the resistance value of the 8th resistance R8 is 48k Ω in the present embodiment, certainly, in practical applications, the 8th resistance R8
Resistance value can adjust accordingly as the case may be, that is, the resistance value of the 8th resistance R8 can carry out as the case may be
It increases accordingly or reduces.
In the present embodiment, which further includes the 4th capacitor C4, one end of the 4th capacitor C4 and the first triode Q1
Collector connection, the other end of the 4th capacitor C4 connect with the base stage of third transistor Q3.4th capacitor C4 is coupled capacitor,
For preventing the interference between the first triode Q1, the second triode Q2 and third transistor Q3, letter is prevented to further enhance
Number interference effect.It is noted that the capacitance of the 4th capacitor C4 is that 460pF is actually being answered certainly in the present embodiment
In, the capacitance of the 4th capacitor C4 can adjust accordingly as the case may be, that is, the capacitance of the 4th capacitor C4
It can be increased accordingly or be reduced as the case may be.
In the present embodiment, which further includes the 9th resistance R9, one end of the 9th resistance R9 and the first triode Q1
Base stage connection, the other end of the 9th resistance R9 current collection with the anode of the first zener diode D1 and the 4th triode Q4 respectively
Pole connection.9th resistance R9 is current-limiting resistance, for carrying out current-limiting protection, to further enhance current limitation effect.It is worth mentioning
It is that in the present embodiment, the resistance value of the 9th resistance R9 is 29k Ω, certainly, in practical applications, the resistance value of the 9th resistance R9 can be with
Adjust accordingly as the case may be, that is, the 9th resistance R9 resistance value can be increased accordingly as the case may be or
Reduce.
In short, in the present embodiment, which is used
Component is less, and circuit structure is relatively simple, maintains easily, due to saving some components, can reduce in this way hardware at
This.In addition, being equipped with current-limiting resistance and Current Limiting Diodes in the power module 1, therefore the safety and reliability of circuit is higher.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of video conferencing system, which is characterized in that including power module, voice collection device, photographic device, micro process
Device, multi-screen processor, display screen, Cloud Server, wireless communication module, mobile terminal and public address set, the power module, sound
Sound acquisition device, photographic device, multi-screen processor and public address set are connect with the microprocessor, the display screen with it is described
Multi-screen processor connection, the microprocessor are communicated by network with the Cloud Server, and the microprocessor passes through the nothing
Line communication module is connect with the mobile terminal, and the voice collection device includes wireless session host and multiple microphones, multiple
The microphone is connect with the input terminal of the wireless session host, the output end of the wireless session host and the micro process
Device connection, the photographic device include multiple cameras that meeting room different location is arranged in, and the display screen is liquid crystal-spliced
Show wall, the public address set includes main public address set and back court mends acoustic device, and the main public address set is described including being distributed in
Two sound equipments at left and right sides of display screen, it includes more ceiling sound equipments that the back court, which mends acoustic device,；
The power module includes voltage input end, first capacitor, first resistor, the 7th resistance, the first triode, the second electricity
Resistance, the second triode, third transistor, 3rd resistor, the first inductance, the second capacitor, the 4th resistance, the 5th resistance, first are surely
Press diode, the 4th triode, the 6th resistance and voltage output end, the voltage input end respectively with the 7th resistance one
End is connected with the emitter of the second triode, the other end of the 7th resistance respectively with the first capacitor positive and first
One end of resistance connects, the cathode ground connection of the first capacitor, the other end of the first resistor respectively with the one or three pole
The collector of pipe is connected with the base stage of third transistor, the base stage of first triode respectively with the second resistance one
The collector connection at end, the anode of the first zener diode and the 4th triode, the emitter and second of first triode
The other end of resistance is grounded, and the emitter of first triode is grounded by the 3rd resistor, second triode
Base stage connect with the collector of the third transistor, one end of the collector of second triode and first inductance
Connection, the other end of first inductance respectively with the anode of second capacitor, one end of the 5th resistance, the 4th triode
One end of emitter and the 6th resistance connection, second capacitor cathode ground connection, the other end of the 5th resistance respectively with
One end of 4th resistance is connected with the cathode of the first zener diode, the other end of the 4th resistance ground connection, and described the
The other end of six resistance is connect with the anode of the voltage output end and the second diode respectively, the cathode of second diode
It is connect with the base stage of the 4th triode, the resistance value of the 7th resistance is 37k Ω, the model S- of second diode
202T。
2. video conferencing system according to claim 1, which is characterized in that the power module further includes third capacitor,
One end of the third capacitor is connect with the base stage of second triode, the other end of the third capacitor and the described 3rd 3
The collector of pole pipe connects, and the capacitance of the third capacitor is 390pF.
3. video conferencing system according to claim 2, which is characterized in that the power module further includes the 8th resistance,
One end of 8th resistance is connect with the anode of second capacitor, the other end of the 8th resistance and the four or three pole
The emitter of pipe connects, and the resistance value of the 8th resistance is 48k Ω.
4. video conferencing system according to claim 3, which is characterized in that the power module further includes the 4th capacitor,
One end of 4th capacitor is connect with the collector of first triode, the other end of the 4th capacitor and the third
The base stage of triode connects, and the capacitance of the 4th capacitor is 460pF.
5. video conferencing system according to claim 4, which is characterized in that the power module further includes the 9th resistance,
One end of 9th resistance is connect with the base stage of first triode, and the other end of the 9th resistance is respectively with described
The connection of the collector of the anode of one zener diode and the 4th triode, the resistance value of the 9th resistance are 29k Ω.
6. video conferencing system according to any one of claims 1 to 4, which is characterized in that first triode and
Third transistor is NPN type triode.
7. video conferencing system according to any one of claims 1 to 4, which is characterized in that second triode and
4th triode is PNP type triode.
8. video conferencing system according to any one of claims 1 to 4, which is characterized in that the wireless communication module
For bluetooth module, WIFI module, gsm module, GPRS module, CDMA module, CDMA2000 module, WCDMA module, TD-SCDMA
Module, Zigbee module or LoRa module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811174309.7A CN109302577A (en) | 2018-10-09 | 2018-10-09 | Video conferencing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811174309.7A CN109302577A (en) | 2018-10-09 | 2018-10-09 | Video conferencing system |
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| Publication Number | Publication Date |
|---|---|
| CN109302577A true CN109302577A (en) | 2019-02-01 |
Family
ID=65161954
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811174309.7A Pending CN109302577A (en) | 2018-10-09 | 2018-10-09 | Video conferencing system |
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| Country | Link |
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| CN (1) | CN109302577A (en) |
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| US20070267981A1 (en) * | 2006-05-16 | 2007-11-22 | Junzhong Peng | Power-Saving and Stabilizing Ballast |
| CN203554287U (en) * | 2013-11-18 | 2014-04-16 | 青岛伏科太阳能有限公司 | Bipolar power supply circuit and solar power charge and discharge controller |
| CN205191640U (en) * | 2015-11-27 | 2016-04-27 | 袁建儿 | Novel ignition mechanism |
| CN206461522U (en) * | 2017-01-11 | 2017-09-01 | 深圳硕日新能源科技有限公司 | A kind of auto-excitation type reduction voltage circuit |
| CN206975705U (en) * | 2017-10-23 | 2018-02-06 | 深圳市飞马国际供应链股份有限公司 | Logistics enquiring system based on Internet of Things |
| CN207053654U (en) * | 2017-07-25 | 2018-02-27 | 杭州市林业水利信息中心 | A kind of Video Conference System |
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- 2018-10-09 CN CN201811174309.7A patent/CN109302577A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070267981A1 (en) * | 2006-05-16 | 2007-11-22 | Junzhong Peng | Power-Saving and Stabilizing Ballast |
| CN203554287U (en) * | 2013-11-18 | 2014-04-16 | 青岛伏科太阳能有限公司 | Bipolar power supply circuit and solar power charge and discharge controller |
| CN205191640U (en) * | 2015-11-27 | 2016-04-27 | 袁建儿 | Novel ignition mechanism |
| CN206461522U (en) * | 2017-01-11 | 2017-09-01 | 深圳硕日新能源科技有限公司 | A kind of auto-excitation type reduction voltage circuit |
| CN207053654U (en) * | 2017-07-25 | 2018-02-27 | 杭州市林业水利信息中心 | A kind of Video Conference System |
| CN206975705U (en) * | 2017-10-23 | 2018-02-06 | 深圳市飞马国际供应链股份有限公司 | Logistics enquiring system based on Internet of Things |
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Application publication date: 20190201 |