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 withFor simple, cost is relatively low, maintains easily, the higher video conference with circuit protection function of the safety and reliability of circuitSystem.
The technical solution adopted by the present invention to solve the technical problems is: constructing a kind of video with circuit protection functionConference system, including audio-video processing unit, wireless microphone, wire microphone, camera, display terminal, local computer,Remote computer, power supply module and mobile terminal, the audio-video processing unit include wireless communication module, audio processing mouldBlock, video processing module, Wireless microphone receiver, wire microphone socket and speaker, the wireless communication module with it is describedMobile terminal connection, the wireless communication module are equipped with speech output end and voice input terminal, and the audio processing modules are equipped withFirst audio input end, the second audio input end, third audio input end, the first audio output, the second audio output andThird audio output, the speech output end are connect with first audio input end, first audio output and instituteThe connection of predicate sound input terminal, second audio input end are connect with the Wireless microphone receiver, the wire microphoneIt being connect with the wire microphone socket, the wire microphone socket is also connect with second audio input end, and describedTwo audio outputs are connect with the speaker, the third audio input end and the third audio output with the localComputer connection, the Wireless microphone receiver are wirelessly connect with the wireless microphone, the video processingModule is equipped with video input interface and video output interface, and the video input interface is connect with the camera, the videoOutput interface is connect with the local computer, and the display terminal is connect with the local computer, the local computerIt is connect by network with the remote computer, the power supply module is connect with the audio-video processing unit；
The power supply module includes transformer, bridge rectifier, first capacitor, first resistor, the second capacitor, the one or three polePipe, third capacitor, first diode, the second triode, the 5th capacitor, second resistance, third transistor, the second diode,Three diodes, the 4th triode, 3rd resistor, the 4th resistance, the 5th resistance, the 5th triode, the 4th diode, the 4th capacitorAnd voltage output end, one end of one end connection 220V alternating current of the primary coil of the transformer, the primary of the transformerThe other end of coil is connect with the other end of the 220V alternating current, one end of the secondary coil of the transformer and the bridge-typeOne input terminal of rectifier connects, and another input terminal of the bridge rectifier is another with the secondary coil of the transformerOne end connection, an output end of the bridge rectifier respectively with the anode of the first capacitor, first resistor one end andThe collector of first triode connects, and the other end of the first resistor is connect with the anode of second capacitor, and described firstThe cathode of the cathode of capacitor and the second capacitor is connect with the another output of the bridge rectifier, first triodeThe anode of base stage and the third capacitor connect, the cathode of the third capacitor respectively with the base stage of second triode andThe cathode of first diode connects, the emitter of the anode of the first diode and the second triode with second capacitorCathode connection, the collector of second triode connect by the 5th capacitor with the base stage of the third transistor；
The emitter of first triode respectively with one end of the second resistance, the cathode of third diode, the 5thThe base stage of triode is connected with one end of voltage output end, the current collection of the other end of the second resistance and the third transistorPole connection, the anode of the third diode are connect with the emitter of the 4th triode, the transmitting of the third transistorPole is connect with the cathode of second diode, the collector of the 4th triode and one end of 3rd resistor respectively, and described secondThe anode of diode is connect with the other end of the emitter of second triode and 3rd resistor respectively, the 5th triodeEmitter connect with one end of the 4th resistance, the other end of the 4th resistance base with the 4th triode respectivelyPole, the 5th resistance one end connected with the anode of the 4th diode, the collector of the 5th triode is respectively with the described 4thThe anode connection of the cathode of diode and the 4th capacitor, the other end of the 5th resistance cathode with the 4th capacitor respectivelyIt is connected with the other end of voltage output end, the capacitance of the 5th capacitor is 350pF.
In the video conferencing system of the present invention with circuit protection function, the power supply module further includes the 6thOne end of resistance, the 6th resistance is connect with the cathode of the third diode, the other end of the 6th resistance with it is describedThe base stage of 5th triode connects, and the resistance value of the 6th resistance is 36k Ω.
In the video conferencing system of the present invention with circuit protection function, the power supply module further includes the 7thOne end of resistance, the 7th resistance is connect with one end of the first resistor, the other end of the 7th resistance and described theThe collector of one triode connects, and the resistance value of the 7th resistance is 45k Ω.
In the video conferencing system of the present invention with circuit protection function, the power supply module further includes the 5thThe anode of diode, the 5th diode is connect with the emitter of first triode, the cathode of the 5th diodeIt is connect with one end of the second resistance, the model L-2733 of the 5th diode.
In the video conferencing system of the present invention with circuit protection function, first triode and the two or threePole pipe is NPN type triode.
In the video conferencing system of the present invention with circuit protection function, the third transistor, the four or threePole pipe and the 5th triode are NPN type triode.
In the video conferencing system of the present invention with circuit protection function, the wireless communication module is bluetoothModule, WIFI module, gsm module, GPRS module, CDMA module, CDMA2000 module, WCDMA module, TD-SCDMA module,Zigbee module or LoRa module.
Implement the video conferencing system with circuit protection function of the invention, has the advantages that due to being equipped withAudio-video processing unit, wireless microphone, wire microphone, camera, display terminal, local computer, remote computer, confessionElectric module and mobile terminal；Power supply module includes transformer, bridge rectifier, first capacitor, first resistor, the second capacitor,One triode, third capacitor, first diode, the second triode, the 5th capacitor, second resistance, third transistor, the two or two polePipe, third diode, the 4th triode, 3rd resistor, the 4th resistance, the 5th resistance, the 5th triode, the 4th diode,Four capacitors and voltage output end, power pack of the power supply module relative to traditional video conference system, the component usedIt is less, due to saving some components, hardware cost can be reduced in this way, in addition, the 5th capacitor is for preventing the two or three poleInterference between pipe and third transistor, therefore circuit structure is relatively simple, cost is relatively low, maintains easily, the safety of circuitIt is higher with reliability.
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, completeSite 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 onEmbodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every otherEmbodiment shall fall within the protection scope of the present invention.
In the video conferencing system embodiment that the present invention has circuit protection function, this has the view of circuit protection functionThe structural schematic diagram of frequency conference system is as shown in Figure 1.In Fig. 1, it includes sound that this, which has the video conferencing system of circuit protection function,Video process apparatus 1, wireless microphone 2, wire microphone 3, camera 4, display terminal 5, local computer 6, remote computationMachine 7, power supply module 8 and mobile terminal 9, wherein audio-video processing unit 1 includes wireless communication module 11, audio processing modules12, video processing module 13, Wireless microphone receiver 14, wire microphone socket 15 and speaker 16, wireless communication module 11It is connect with mobile terminal 9, wireless communication module 11 is equipped with speech output end SPK and voice input terminal MIC, audio processing modules 12Equipped with the first audio input end IN1, the second audio input end IN2, third audio input end IN3, the first audio output OUT1,Second audio output OUT2 and third audio output OUT3, the first audio input end IN1 for inputting videoconference signal,Second audio input end IN2 comes from local computer 6 for inputting for inputting microphone signal, third audio input end IN3Web conference signal, the first audio output OUT1 is for exporting voice signal to wireless communication module 11, the second audioOutput end OUT2 is used to export voice signal to speaker 16, and third audio output OUT3 is used to export to local computer 6Voice signal.
Specifically, speech output end SPK is connect with the first audio input end IN1, the first audio output OUT1 and languageThe MIC connection of sound input terminal, the second audio input end IN2 are connect with Wireless microphone receiver 14, wire microphone 3 and wired wheatGram wind socket 15 connects, and wire microphone socket 15 also connect with the second audio input end IN2, the second audio output OUT2 andSpeaker 16 connects, and third audio input end IN3 is connect with local computer 6 with third audio output OUT3, wireless MikeWind receiver 14 is wirelessly connect with wireless microphone 2.
Video processing module 13 is equipped with video input interface V-in and video output interface V-out, video input interface V-In is connect with camera 4, and video output interface V-out is connect with local computer 6, and display terminal 5 and local computer 6 connectIt connects, local computer 6 is connect by network with remote computer 7, and power supply module 8 is connect with audio processing modules 12.
Module 11 actively can establish telecommunication with mobile terminal 9 to user by wireless communication, this has circuit protectionMode realizes remote phone meeting to the video conferencing system of function by wireless communication, is not limited by route, use is more squareJust.
In the present embodiment, wireless communication module 11 is bluetooth module, WIFI module, gsm module, GPRS module, CDMA mouldBlock, CDMA2000 module, WCDMA module, TD-SCDMA module, Zigbee module or LoRa module etc..By the way that a variety of nothings are arrangedLine 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 withHigh occasion.
In specific application, multiple wireless microphones 2 and multiple wire microphones 3 can be configured in local meeting-place, withIt says and uses for more human hairs in local meeting-place.Furthermore, it is also possible to multiple cameras 4 be configured in local meeting-place, for absorbing thisScene in ground meeting-place.
When carrying out multi-party call meeting, this has the working principle of the video conferencing system of circuit protection function as follows:Wireless communication module 11 by wireless communication establish telecommunication with mobile terminal 9 and connect by network, speech output end SPK and firstRemote phone conference signal, can be transferred to audio processing modules 12 by audio input end IN1 connection.
Personnel in local meeting-place can be made a speech by microphone, and audio-video processing unit 1 passes through built-in wireless MikeWind receiver 14 and wire microphone socket 15 receive the microphone signal in local meeting-place；Wherein, Wireless microphone receiver14 receive the voice signal of 2 typing of wireless microphone in local meeting-place, and wire microphone socket 15 receives in local meeting-placeThe voice signal of 3 typing of wire microphone, above-mentioned microphone voice signal are transferred to the second audio input IN2；Second soundFrequency output end OUT2 is connected to speaker 16.
Local computer 6 in local meeting-place can access internet, and be led to by internet with remote computer 7Letter, such as hold Web conference, video communication etc..The audio output port and third audio input end IN3 of local computer 6 connectIt is logical, to receive Web conference signal from local computer 6；And the audio of third audio output OUT3 and local computer 6Input port connection, by audio signal transmission to local computer 6.
Audio-video processing unit 1 by built-in audio processing modules 12 handle videoconference signal, microphone signal andWeb conference signal, the first audio signal that microphone signal and Web conference signal are synthesized, by videoconference signal, MikeSecond audio signal of wind number and the synthesis of Web conference signal mixes the third that videoconference signal and microphone signal synthesizeSound signal.Finally, the first audio signal is transferred to wireless communication module 11 by the first audio output OUT1, and then transmitTo mobile terminal 9, the second audio signal is transferred to by speaker 16 by the second audio output OUT2, thus in local meeting-placeVideoconference voice is played, third audio signal is transferred to by local computer 6, Jin Erchuan by third audio output OUT3It is defeated to arrive remote computer 7, multi-party call meeting is realized with this.
Video processing module 13 in audio-video processing unit 1 is also used to handle vision signal, passes through video input interfaceV-in receives the meeting live video that camera 4 absorbs, and after integrating to video, is transmitted by video output interface V-outTo local computer 6, is exported by local computer 6 and played out to display terminal 5.Alternatively, being transmitted to by local computer 6Remote computer 7 makes long-range people with a part in a conference person by understanding conference scenario.In addition, can also pass through on local meeting-placeLocal computer 6 receives the video of remote computer 7, and plays on the display terminal 5 in local meeting-place.
The video conferencing system with circuit protection function can access the wireless microphone signals at scene and carry out audioProcessing is realized so that the personnel that wireless microphone 2 is made a speech that pass through on current meeting-place may be added in remote phone meetingMulti-party call.The video conferencing system with circuit protection function can also further access computer, to receive telenetThe voice signal of network meeting, so that the personnel for holding Web conference on computers can also be added in remote phone meeting,It can effectively realize that meeting scene and the fusion call of remote audio, video make to expand the use crowd of remote phone meetingThe participant of remote phone meeting is not limited only to telephone subscriber, and easy to operate.
Fig. 2 is the circuit diagram of power supply module in the present embodiment, and in Fig. 2, which includes transformer T, bridge-typeRectifier Z, first capacitor C1, first resistor R1, the second capacitor C2, the first triode Q1, third capacitor C3, first diodeD1, the second triode Q2, the 5th capacitor C5, second resistance R2, third transistor Q3, the second diode D2, third diode D3,4th triode Q4,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 5th triode Q5, the 4th diode D4, the 4thCapacitor C4 and voltage output end Vo, wherein one end of one end connection 220V alternating current of the primary coil of transformer T, transformer TThe other end of primary coil connect with the other end of 220V alternating current, one end of the secondary coil of transformer T and bridge rectifierAn input terminal of device Z connects, and another input terminal of bridge rectifier Z is connect with the other end of the secondary coil of transformer T,An output end of bridge rectifier Z respectively with the anode of first capacitor C1, one end of first resistor R1 and the first triode Q1Collector connection, the positive of the other end of first resistor R1 and the second capacitor C2 connect, the cathode of first capacitor C1 and secondThe cathode of capacitor C2 is connect with the another output of bridge rectifier Z, the base stage and third capacitor C3 of the first triode Q1Anode connection, the cathode of third capacitor C3 connect with the cathode of the base stage of the second triode Q2 and first diode D1 respectively,The emitter of the anode of first diode D1 and the second triode Q2 are connect with the cathode of the second capacitor C2, the second triode Q2Collector connect with the base stage of third transistor Q3 by the 5th capacitor C5.
The emitter of first triode Q1 respectively with one end of second resistance R2, the cathode of third diode D3, the five or threeThe base stage of pole pipe Q5 is connected with one end of voltage output end Vo, the other end of second resistance R2 and the collector of third transistor Q3Connection, the anode of third diode D3 connect with the emitter of the 4th triode Q4, the Q3 emitter of third transistor respectively withThe cathode of second diode D2, the collector of the 4th triode Q4 are connected with one end of 3rd resistor R3, the second diode D2'sAnode is connect with the other end of the emitter of the second triode Q2 and 3rd resistor R3 respectively, the emitter of the 5th triode Q5 withOne end of 4th resistance R4 connects, the other end of the 4th resistance R4 respectively with the base stage of the 4th triode Q4, the 5th resistance R5One end is connected with the anode of the 4th diode D4, the collector of the 5th triode Q5 respectively with the cathode of the 4th diode D4 andThe anode connection of four capacitor C4, the other end of the 5th resistance R5 are another with the cathode of the 4th capacitor C4 and voltage output end Vo respectivelyOne end connection.
The power pack of the power supply module 8 relative to traditional video conference system, the component used is less, circuit knotStructure is relatively simple, maintains easily, and due to saving some components, can reduce hardware cost in this way.In addition, the 5th capacitor C5For coupled capacitor, for preventing the interference between the second triode Q2 and third transistor Q3, therefore the safety of circuit and canIt is higher by property.It is noted that the capacitance of the 5th capacitor C5 is 350pF in the present embodiment, certainly, in practical applications,The capacitance of 5th capacitor C5 can adjust accordingly as the case may be, that is, the capacitance of the 5th capacitor C5 can rootIt is increased accordingly or is reduced according to concrete condition.
First triode Q1, the second triode Q2, first resistor R1, the second capacitor C2, third capacitor C3 and the one or two polePipe D1 constitutes starting processing circuit, the 4th triode Q4, the 5th triode Q5,3rd resistor R3, the 5th resistance R5, the 4th capacitorC4 and the 4th diode D4 constitutes delay startup circuit, in use, voltage output end Vo connection audio-video processing unit 1.The confessionElectric module 8 can realize the starting to audio-video processing unit 1, and after powering on power supply module 8, output voltage is opened by oneDynamic process rises to given value with slower speed, to protect audio-video processing unit 1 not rushed on startup by surgeIt hits.When starting, which also ensures 40 seconds or so optimum delay time.
In the present embodiment, the first triode Q1 and the second triode Q2 are NPN type triode, third transistor Q3,Four triode Q4 and the 5th triode Q5 are NPN type triode.Certainly, in practical applications, the first triode Q1 and secondTriode Q2 can also be PNP type triode, and third transistor Q3, the 4th triode Q4 and the 5th triode Q5 can also be equalFor PNP type triode, but at this moment the structure of circuit also will accordingly change.
In the present embodiment, which further includes the 6th resistance R6, one end of the 6th resistance R6 and third diode D3Cathode connection, the other end of the 6th resistance R6 connect with the base stage of the 5th triode Q5.6th resistance R6 is current-limiting resistance, is usedIn carrying out current-limiting protection, to further enhance the safety and reliability of circuit.It is noted that in the present embodiment, the 6thThe resistance value of resistance R6 is 36k Ω, and certainly, in practical applications, the resistance value of the 6th resistance R6 can carry out phase as the case may beIt should adjust, that is, the resistance value of the 6th resistance R6 can be increased accordingly or be reduced as the case may be.
In the present embodiment, which further includes the 7th resistance R7, and one end of the 7th resistance R7 is with first resistor R1'sOne end connection, the other end of the 7th resistance R7 are connect with the collector of the first triode Q1.7th resistance R7 is current-limiting resistance, is usedCurrent-limiting protection is carried out in the emitter current to the first triode Q1, to update the safety and reliability of step enhancing circuit.It is noted that the resistance value of the 7th resistance R7 is 45k Ω in the present embodiment, certainly, in practical applications, the 7th resistance R7Resistance value can adjust accordingly as the case may be, that is, the resistance value of the 7th resistance R7 can carry out as the case may beIt increases accordingly or reduces.
In the present embodiment, which further includes the 5th diode D5, the anode of the 5th diode D5 and the one or three poleThe emitter of pipe Q1 connects, and the cathode of the 5th diode D5 is connect with one end of second resistance R2.5th diode D5 is current limlitingDiode carries out current-limiting protection for the emitter current to the first triode Q1, to further enhance current limitation effect.It is worth oneIt is mentioned that, in the present embodiment, the model L-2733 of the 5th diode D5, certainly, and in practical applications, the 5th diode D5There can be the diode of similar functions using other models.
In short, in the present embodiment, which is usedComponent is less, and circuit structure is relatively simple, maintains easily, due to saving some components, can reduce in this way hardware atThis.In addition, being equipped with coupled capacitor in the power supply module 8, 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 inventionWithin mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.