CN209313845U - IP network broadcaster - Google Patents

IP network broadcaster Download PDF

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Publication number
CN209313845U
CN209313845U CN201920174375.8U CN201920174375U CN209313845U CN 209313845 U CN209313845 U CN 209313845U CN 201920174375 U CN201920174375 U CN 201920174375U CN 209313845 U CN209313845 U CN 209313845U
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stationary contact
network
input
output
contact
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罗志锋
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Guangzhou Ddt Long Jian Electronics Co Ltd
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Guangzhou Ddt Long Jian Electronics Co Ltd
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Abstract

Utility model discloses IP network broadcaster, including network audio server and the network equipment, and the network equipment includes that network audio expands device, network-control input unit and network microphone work station；It is communicated between network audio service and each network equipment by internet, control and the broadcasting of multiple audio zone audio signals control while the more network equipments can be thus achieved by a network audio server, the channel for being directed to the network equipment can select to be set as broadcast channel and acquisition channel according to demand, complicated line is not needed, it is simple with structure, stability is high, high reliability, in the present invention, the network equipment is matched by network audio server ip address to be postponed, it can be identified by network audio server and be established with network audio server and be communicated, therefore the utility model IP network broadcast system can extend more broadcast audio areas according to demand, it is not limited by line and hardware resource.

Description

IP network broadcaster
Technical field
The utility model relates to a kind of broadcast systems, in particular to IP network broadcast system, device, method and network audio Server.
Background technique
With the rapid development being constantly progressive with science and technology in epoch, the functional requirement of modern architecture and original building There is apparent difference, the high speed development of light current technology is especially built, by electronic technology, mechanics of communication, network technology, calculating The state-of-the-art technology of the series such as machine technology, automatic control technology, sensor technology introduces, and mentions the service function of building significantly Height, comprehensive stronger, the field being related to is wider.A component part of the public broadcasting as weak electricity system, be closely connected people The modern life, music can be played and do service propaganda and paging broadcast, moreover it is possible to as the urgent wide of fire incident It broadcasts, is a kind of extremely strong broadcast system of uniformity, be widely used in cell, market, hotel, office cell, airport, harbour, station Equal places are indispensable parts in the modern life and work.
Broadcast product on the market is mainly traditional analog broadcast system at present, and traditional analog broadcasting product is being constituted Multiple sound resource broadcasting, multiple functional broadcast system, required structural device product is excessively various, and the installation space condition of system needs It asks larger, user is allowed to use the invisible demand for increasing cost, apply in the composition of system and set due to needing more It is standby to cross machine connection, the audio transmission poor anti jamming capability of system is caused, more broadcast audio areas can not be expanded.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the prior arts and insufficient, provides that a kind of structure is simple, stability High and high reliablity IP network broadcaster, has the advantages that audio collection and Broadcasting Control are flexible, and solve biography Analog broadcast system sound quality of uniting is bad, transmission range is limited and can not extend the defect in more broadcast audio areas.
The purpose of this utility model is achieved through the following technical solutions: a kind of IP network broadcaster, which is characterized in that packet Include network audio server and the network equipment, the network equipment include network audio expand device, network-control input unit and Network microphone work station；The network equipment connects network audio server by internet；
It includes the first main control unit, the first internet communication module and the first input/output that the network audio, which expands device, Channel, first main control unit access internet and network audio server communication by the first internet communication module；The One input/output channel includes the first coding unit, the first decoding unit and first selecting unit, first coding unit Output the first main control unit of connection, the input of first decoding unit connect the first main control unit；First coding unit Input and the output of the first decoding unit be separately connected first selecting unit, the control terminal connection first of first selecting unit is main Unit is controlled, the first main control unit makes the input of the first coding unit be switched to outside or first by controlling first selecting unit The output of decoding unit is switched to outside, configures broadcast channel or acquisition channel for the first input/output channel；
The network microphone work station includes that the second main control unit, the second internet communication module, microphone and second are defeated Enter/output channel, the second input/output channel includes the second coding unit, the second decoding unit and the second selecting unit, described Second main control unit connects the second internet communication module, accesses internet and network audio by the second internet communication module Server communication；The input of second coding unit and the output of the second decoding unit are separately connected the second selecting unit, the The control terminal of two selecting units connects the second main control unit, and the second main control unit is single by the second coding of the second selecting unit control The input of member is switched to external or the second decoding unit output and is switched to outside, configures the second input/output channel to Broadcast channel or acquisition channel；The audio input of the microphone is input to the second coding unit after acquiring by Acquisition Circuit, The second main control unit is transmitted after encoding by the second coding unit；
The network-control input unit includes third main control unit, third internet communication module and fire-fighting signal detection Unit；The third main control unit connects third internet communication module, accesses internet by third internet communication module With network audio server communication；Fire-fighting signal detection unit connects external fire fighting alarm device, and fire-fighting signal detection unit connects Third main control unit is connect, the alarm signal that will test is sent to third main control unit；Third main control unit is receiving alarm After signal, network audio server is sent to by third internet communication module.
Preferably, the network audio is expanded in device, and first selecting unit includes first in each first input/output channel Relay, the first relay include two groups of contacts, respectively first group of contact and second group of contact, and first group of contact is normal by first Close stationary contact, the first normally opened stationary contact and the first movable contact composition, second group of contact is by the second normally closed stationary contact, second normally opened quiet Contact and the second movable contact composition；The control terminal of first relay connects the first main control unit, is controlled by the first main control unit First movable contact connects the first normally closed stationary contact or the first normally opened stationary contact, controls the second movable contact by the first main control unit and connects Connect the second normally closed stationary contact or the second normally opened stationary contact；
The left channel audio signal decoded output of first decoding unit passes sequentially through the first power amplification circuit, first low The first normally closed stationary contact or the first normally opened stationary contact are connected after bandpass filter and the second power amplification circuit；First normally opened stationary contact Or first normally closed stationary contact connect connect after the 5th power amplification circuit the first coding unit left channel audio signal coding it is defeated Enter end, external left channel audio signal is inputted by the first normally opened stationary contact or the first normally closed stationary contact；
The right channel audio signal decoded output of first decoding unit is sequentially connected third power amplification circuit, second low The second normally closed stationary contact or the second normally opened stationary contact, the second normally opened stationary contact are connected after bandpass filter and the 4th power amplification circuit Or second normally closed stationary contact connect connect after the 6th power amplification circuit the first coding unit right channel audio signal coding it is defeated Enter end, external right channel audio signal is inputted by the second normally opened stationary contact or the second normally closed stationary contact；
First input/output channel connects external audio equipment or external sound by the first movable contact and the second movable contact Source；
The output of 5th power amplification circuit connects the first differential amplifier circuit with the output of the 6th power amplification circuit, the The output signal end of one differential amplifier circuit connects the first main control unit.
Preferably, network audio is expanded in device, and the first input/output channel further includes sinusoidal wave generation circuit；Sine wave The input terminal of generative circuit connects the pulse signal output end of the first main control unit, and pulse signal is converted into sine wave signal；
First selecting unit includes the first relay in first input/output channel, and the first relay includes two groups of contacts, Respectively first group of contact and the second contact, first group of contact are moved by the first normally closed stationary contact, the first normally opened stationary contact and first Contact composition, the second contact is made of the second normally closed stationary contact, the second normally opened stationary contact and the second movable contact；First relay Control terminal connects the first main control unit, controls the first movable contact by the first main control unit and connects the first normally closed stationary contact or first Normally opened stationary contact controls the second movable contact by the first main control unit and connects the second normally closed stationary contact or the second normally opened stationary contact；
The left channel audio signal decoded output of first decoding unit is sequentially connected the first power amplification circuit and first Low-pass filter, the decoded right channel audio signal decoded output of the first decoding unit are sequentially connected the second power amplification circuit With the second low-pass filter, the output end of the first low-pass filter and the second low-pass filter is separately connected the second differential amplification electricity The input terminal on road；
The left channel audio signal output end of second differential amplifier circuit connects the first normally closed stationary contact of the first relay Or the first normally opened stationary contact, the first normally opened stationary contact or the first normally closed stationary contact are compiled by the 5th power amplification circuit connection first The left channel audio signal coding input end of code unit inputs external left by the first normally opened stationary contact or the first normally closed stationary contact Channel audio signal；
The right channel audio signal output end of second differential amplifier circuit connects the second normally closed stationary contact of the first relay Or the second normally opened stationary contact, the second normally opened stationary contact or the second normally closed stationary contact are compiled by the 6th power amplification circuit connection first The right channel audio signal coding input end of code unit inputs external right by the second normally opened stationary contact or the second normally closed stationary contact Channel audio signal；
First input/output channel connects external audio equipment or external sound by the first movable contact and the second movable contact Source；
The output of 5th power amplification circuit connects the first differential amplifier circuit with the output of the 6th power amplification circuit, the The output signal end of one differential amplifier circuit connects the first main control unit, sends to after carrying out analog-to-digital conversion by the first main control unit Network audio server；
The output end of sinusoidal wave generation circuit connects the input terminal of the second differential amplifier circuit, is the second differential amplifier circuit Sine wave signal is provided.
Further, network audio is expanded in device, further includes power amplifier fault detection circuit, is matched for detecting Be set to external power amplifier that the first input/output channel of broadcast channel is connected whether failure；Power amplifier failure Detection circuit includes third relay and third photoelectrical coupler；Third relay includes two groups of contacts, respectively the 5th group of touching Point and the 6th group of contact, the 5th group of contact include the 5th normally closed stationary contact, the 5th normally opened stationary contact and the 5th movable contact, and the 6th group Contact includes the 6th normally closed stationary contact, the 6th normally opened stationary contact and the 6th movable contact；The control terminal connection first of third relay Main control unit controls the 5th movable contact by the first main control unit and connects the 5th normally closed stationary contact or the 5th normally opened stationary contact, leads to It crosses the first main control unit and controls the 6th movable contact the 6th normally closed stationary contact of connection or the 6th normally opened stationary contact；
It is directed to the first input/output channel of external power amplifier fault detection to be carried out, the 5th normally closed stationary contact The audio output for the external power amplifier that the input/output channel is connected is connected respectively with the 6th normally closed stationary contact With audio public output；5th normally opened stationary contact and the 6th normally opened stationary contact are connected respectively external non-firm power amplifier Audio output and audio public output；5th moving contact and the 6th moving contact are separately connected the defeated of third photoelectrical coupler Enter anode and input negative terminal, the output end of third photoelectrical coupler connects the first main control unit；
It is directed to the first input/output channel of external power amplifier fault detection to be carried out, external non-firm power is put Big device is in addition other power amplifiers or be as first input/output that the first input/output channel reconnects The external power amplifier that other the first input/output channels of channel standby are connected.
Further, network audio is expanded in device, further includes that 24V cuts by force circuit module；
The 24V cut by force circuit module include the 4th relay, the 4th relay include the 7th normally closed stationary contact, the 7th often Open stationary contact and the 7th movable contact；Wherein the control terminal of the 4th relay connects the first main control unit, passes through the first main control unit It controls the 7th movable contact and connects the 7th normally closed stationary contact or the 7th normally opened stationary contact, the 7th normally closed stationary contact ground connection, the 7th is normally opened Contact connects 24V power supply；24V cuts by force circuit module and cuts equipment by force by the external 24V power supply power supply of the 7th movable contact connection.
Further, network audio is expanded in device, further includes that three-wire system cuts by force circuit module；
It includes the 5th relay that the three-wire system, which cuts by force circuit module, and the 5th relay includes the 8th normally closed stationary contact, the Eight normally opened stationary contacts and the 8th movable contact；Wherein the control terminal of the 5th relay connects the first main control unit, passes through the first master control Unit controls the 8th movable contact and connects the 8th normally closed stationary contact or the 8th normally opened stationary contact；Three-wire system cuts by force circuit module by the The common end COM of eight normally closed stationary contact connection external audio equipment volume controllers, is connected external by the 8th normally opened stationary contact The hot end of stereo set volume controller connects the urgent end of external audio equipment volume controller by the 8th movable contact.
Further, the network audio is expanded in device, further includes external equipment trigger circuit；The external equipment touching Power Generation Road includes photoelectrical coupler and the 6th relay；The input terminal of the photoelectrical coupler connects as external signal triggering end Receive outer triggering signal；The output of the photoelectrical coupler terminates the first main control unit；6th relay includes the 9th normal Close stationary contact, the 9th normally opened stationary contact and the 9th movable contact；Wherein the control terminal of the 6th relay connects the first main control unit, leads to It crosses the first main control unit and controls the 9th movable contact the 9th normally closed stationary contact of connection or the 9th normally opened stationary contact；In 6th relay, External equipment trigger circuit is linked into the control loop of external equipment by the 9th normally opened stationary contact and the 9th movable contact, is used for Connect the control loop of external equipment.
Preferably, in the network microphone work station, in the second input/output channel the second selecting unit include second after Electric appliance, the second relay include two groups of contacts, and respectively third group contact and the 4th group of contact, third group contact is normally closed by third The normally opened stationary contact of stationary contact, third and third movable contact composition, the 4th group of contact is by the 4th normally closed stationary contact, the 4th normally opened stationary contact Point and the 4th movable contact composition；The control terminal of second relay connects the second main control unit, passes through the second main control unit control the Three movable contacts connect the normally closed stationary contact of third or the normally opened stationary contact of third, control the connection of the 4th movable contact by the second main control unit 4th normally closed stationary contact or the second normally opened stationary contact；
The left channel audio signal decoded output of second decoding unit is sequentially connected the 7th power amplification circuit and the 8th The normally closed stationary contact of third or the normally opened stationary contact of third are connected after power amplification circuit；The normally opened stationary contact of third or the normally closed stationary contact of third The input of point connection third differential amplifier circuit；The decoded right channel audio signal decoded output of second decoding unit successively connects It connects and connects the 4th normally closed stationary contact or the 4th normally opened stationary contact after the 9th power amplification circuit and the tenth power amplification circuit, the 4th The input of normally opened stationary contact or the 4th normally closed stationary contact connection third differential amplifier circuit, the output of third differential amplifier circuit connect The input terminal for connecing the second coding unit inputs external audio signal by the 4th normally opened stationary contact or the 4th normally closed stationary contact；
Second input/output channel connects external audio equipment or external sound by third movable contact and the 4th movable contact Source；
The signal of third differential amplifier circuit output connects the second main control unit by the 11st power amplification circuit, by the Two main control units send network audio server to after carrying out analog-to-digital conversion；
The left channel audio signal input of microphone and right channel audio signal input after Acquisition Circuit acquires respectively It is output to the left channel audio signal coding input end and right channel audio signal coding input end of the second coding unit, passes through The second main control unit is transmitted after two coding units coding；The left channel audio signal input of microphone is adopted by Acquisition Circuit simultaneously It is output to after collection in the 12nd power amplification circuit, the 12nd rate amplification circuit output end connects the second main control unit, by the tenth The signal of two power amplification circuits output sends network audio server to after carrying out analog-to-digital conversion.
Further, the network microphone work station further includes loudspeaker, the left channel audio letter of the second decoding unit Number decoded output and right channel audio signal decoded output are connected respectively to two of loudspeaker by power amplification circuit Input terminal；
The network microphone work station further includes the touch screen connecting with the second main control unit；
The network microphone work station further includes the storage card for being also used to store local music；The acquisition of second main control unit is deposited Audio signal in card storage is then sent to network audio server or is sent out after decoding by the second input/output channel Give external speakers.
Preferably, in the network-control input unit, the fire-fighting signal detection unit includes data selector, data The address end of selector and enable end are separately connected third main control unit, and each input signal end of data selector is separately connected Each road signal deteching circuit；Wherein, every road signal deteching circuit includes resistance, first diode and the second diode, wherein electricity One end of resistance connects DC power supply, and the other end connects the anode of first diode, and the cathode of first diode connects the two or two pole The anode of the cathode of pipe, the plus earth of the second diode, first diode is outer as the test side connection of signal deteching circuit The alarm signal output ends of portion's fire fighting alarm device；In each road signal deteching circuit, resistance is connected with the anode of first diode One end connection data selector input signal end；The signal output end of data selector connects third main control unit.
The utility model compared with the existing technology have following advantages and effects
(1) the utility model IP network broadcaster, including network audio server and the network equipment, the wherein network equipment Device, network-control input unit and network microphone work station are expanded including network audio；The network equipment connects net by internet Network audio server；In the present invention, network audio server, can be with needle by being issued to the control instruction of the network equipment The broadcast channel and acquisition channel of the network equipment are configured, network audio server can be by being directed to network equipments configuration Broadcast channel play broadcast, pass through for network equipments configuration acquisition channel acquire external audio source.When network audio is taken in small doses at short intervals Device be engaged in when executing broadcasting, network audio server can be by the audio signal in broadcasting tasks, network microphone work station The audio signal issued is sent to the corresponding network equipment in institute's configuration broadcast channel；It is logical by broadcast accordingly by the network equipment Road is sent to external audio equipment and plays out；Network audio server receives acquisition tasks and is matched when executing collecting work The corresponding network equipment acquisition channel audio signal collected set.In the utility model, network audio server can basis Demand configures the broadcast channel of the network equipment of corresponding audio zone, while being directed to the sound that network microphone work station microphone is inputted Frequency signal, network audio server can also configure the broadcast channel of the network equipment of corresponding audio zone according to the demand of broadcasting, because This utility model can flexibly control audio signal according to demand and play out in corresponding audio zone, in the utility model In, it is communicated between network audio server and each network equipment by internet, is by a network audio server Control and the broadcasting of multiple audio zone audio signals control while the more network equipments may be implemented, be directed to the network equipment Channel can select to be set as broadcast channel and acquisition channel according to demand, do not need complicated line, have structure it is simple, The advantages of stability height, high reliablity, long transmission distance；Due to passing through internet between network audio server and the network equipment The signal of network transmission is digital signal, can effectively reduce the interference of outer signals；And in the present invention, network is set The standby IP address by network audio server with postponing, can be identified by network audio server and with network audio service Device establishes communication, therefore the utility model IP network broadcast system can extend more broadcast audio areas according to demand, not by The limitation of line and hardware resource, solves that case of conventional analog broadcast system sound quality is bad, transmission range is limited and can not expand Open up the defect in more broadcast audio areas.
(2) in the utility model IP network broadcaster, network audio server can be directed to the audio signal to be played Priority is set, likewise, being directed to network microphone work station microphone audio signal setting priority collected；Work as network Audio server will be sent to the audio signal of the same broadcast channel of the network equipment when being multichannel, and network audio server can be with First determine the priority of each road audio signal, the broadcast that the audio signal of highest priority is sent to the network equipment is led in selection Road；As it can be seen that the utility model IP network broadcast system can play excellent according to the priority of each road audio signal in each audio zone The first highest audio signal of grade is highly suitable for the places such as cell, market, hotel, office cell, airport, harbour, station and carries out It uses.
(3) in the utility model IP network broadcaster, external fire protection warning dress is connected by network-control input unit It sets, when network-control input unit receives the alarm signal that external fire fighting alarm device generates, is sent by internet tight Anxious trigger signal is to network audio server, and network audio server is in the urgent touching for receiving the transmission of network-control input unit After signalling, corresponding broadcasting tasks are executed, fire alarm related content are played in respective audio area, to notify related personnel to withdraw fire Calamity scene, plays the role of fire-fighting link, in the present invention can be excellent by the audio signal of the corresponding broadcasting tasks of fire alarm First grade is arranged relatively high, in this way when fire alarm occurs, can preferentially play corresponding audio signal.In addition, practical new at this In type, network-control input unit, which is sent to band alarm signal generation area in the urgent trigger signal of network audio server, to be believed Breath, network audio server identify alarm signal after the urgent trigger signal for receiving the transmission of network-control input unit From region, according to alarm signal from region execute corresponding broadcasting tasks, corresponding audio signal is sent out It send to corresponding audio zone, there is stronger fire alarm specific aim.
(4) in the network microphone work station of the utility model IP network broadcaster, except through microphone acquisition audio letter Extra is additionally provided with acquisition channel and broadcast channel, the audio signal of external sound source can be acquired by acquisition channel, by wide The audio signal that network audio server can be issued by broadcasting channel is played to external audio equipment, in addition in the utility model net It is provided with touch screen in network microphone work station, the catalogue in network audio server for program request can be sent to network microphone work station And it is shown in touch screen, user can send program request to network audio server by the program request catalogue on touch screen and ask It asks.In the present invention, network microphone work station can be with boombox and built-in for storing depositing for local music Card storage, network microphone work station can send the local audio signal of storage to network audio server or pass through broadcast channel It is sent to external audio equipment to play out, the loudspeaker being arranged in network microphone work station can be sent out for network audio server The local audio signal stored in the audio signal or storage card sent plays out.In addition, in the utility model, access interconnection Each network microphone work of net can realize paging intercommunication function by network audio server.Network microphone in the utility model Work station can be set to general network microphone work station or fire emergency network microphone work station；Network audio server can be with Set highest for the priority of fire emergency network microphone work station microphone audio signal collected；Network audio service Device is when receiving fire emergency network microphone work station microphone audio signal collected, the corresponding broadcast of the control network equipment Channel preferentially plays the audio signal.Therefore when there is fire alarm generation, related personnel can pass through fire emergency network microphone work Make the message such as the artificial broadcasting escape in station.As it can be seen that the network microphone work station in the utility model integrates multiple functions, have Powerful advantage.
(5) network audio of the utility model IP network broadcast is expanded in device, setting power amplifier fault detection electricity Road, for detecting whether the external power amplifier that the first input/output channel is connected breaks down, if detecting circumferential work It when rate amplifier does not have signal output, then regards as external power amplifier and failure occurs, audio signal is passed through external standby It is exported with power amplifier, from the foregoing, it can be seen that, inventive network audio expands device and carries external power amplifier detection Function is detecting external power amplifier when something goes wrong, can control audio signal and passes through external non-firm power amplifier It is exported, has the function of to ensure that audio plays.
(6) network audio of the utility model IP network broadcaster is expanded in device, and included 24V cuts by force circuit module and three Line system cuts by force circuit module；The utility model 24V cuts by force the strong of the external 24V power supply power supply of circuit module connection and cuts equipment；When out When existing fire alarm, can control 24V power supply power supply cutting equipment obtains the power supply of 24V by force, for fighting fire dangerous situation.This is practical Novel three-wire system, which cuts by force circuit module connection external audio equipment volume controller, can pass through three-wire system when there is fire alarm Circuit module control external audio equipment volume controller is cut by force to open, so that the audio signal of the broadcasting of external audio equipment Volume can adjust maximum, avoid because external audio equipment volume is turned down or closed by user and do not receive fire broadcast The case where.
(7) network audio of the utility model IP network broadcaster is expanded in device, further includes external equipment trigger circuit； The input terminal of external trigger circuit can connect the external triggers equipment such as external timer, outside external equipment trigger circuit receives When portion triggers the trigger signal that equipment is sent, the control loop for the external equipment that external equipment trigger circuit is connected can control Conducting, to control external equipment work.
Detailed description of the invention
Fig. 1 is IP network broadcaster structural block diagram.
Fig. 2 is IP network broadcaster structure principle chart.
Fig. 3 a is the circuit diagram that network audio expands that device input/output channel connects lotus flower joint terminal.
Fig. 3 b is the first main control unit MCU circuit diagram that network audio expands device.
Fig. 3 c is that network audio expands in device VS1053 codec chip and decoded output in the first input/output channel The circuit diagram of partial circuit.
Fig. 3 d is that the first coding unit coding input end is connected in the first input/output channel in network audio expansion device Circuit part circuit diagram.
Fig. 3 e is the circuit diagram that network audio expands that the first input/output of device channel connects phoenix insertion terminal.
Fig. 3 f is the circuit diagram that network audio expands device power amplifier fault detection circuit.
Fig. 3 g is the circuit diagram that network audio expands that device 24V cuts by force circuit module.
Fig. 3 h is the circuit diagram that network audio expands that device three-wire system cuts by force circuit module.
Fig. 3 i is the circuit diagram that network audio expands device external equipment trigger circuit.
Fig. 4 a is the second main control unit MCU circuit diagram in network microphone work station.
Fig. 4 b is that the second input/output channel part circuit is former in network microphone work station.
Fig. 4 c is that the second coding unit coding input end is connected in the second input/output channel in network microphone work station Circuit part circuit diagram.
Fig. 4 d is the circuit diagram of microphone Acquisition Circuit in network microphone work station.
Fig. 4 e is the circuit theory of VS1053 codec chip and decoded output partial circuit in network microphone work station Figure.
Fig. 4 f is the circuit diagram of network microphone work station boombox.
Fig. 5 a is the circuit diagram of third main control unit MCU in network-control input unit.
Fig. 5 b is the electricity for each road signal deteching circuit that fire-fighting signal detection unit is connected in network-control input unit Road schematic diagram.
Specific embodiment
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model Mode is without being limited thereto.
Embodiment
Present embodiment discloses a kind of IP network broadcasters, as shown in Figure 1, including that network audio server and network are set Standby, the network equipment includes that network audio expands device, network-control input unit and network microphone work station.Wherein:
The network equipment connects network audio server by internet；
In the present embodiment, as shown in Fig. 2, it includes the first main control unit, the first internet communication mould that network audio, which expands device, Block and the first input/output channel, first main control unit access internet and network by the first internet communication module Audio server communication；First input/output channel includes the first coding unit, the first decoding unit and first selecting unit, The output of first coding unit connects the first main control unit, and the input of first decoding unit connects the first master control list Member；The input of first coding unit and the output of the first decoding unit are separately connected first selecting unit, first choice list The control terminal of member connects the first main control unit, and the first main control unit makes the first coding unit by controlling first selecting unit Input is switched to external or the first decoding unit output and is switched to outside, and the first input/output channel is configured to broadcast Channel or acquisition channel.In the present embodiment, network audio server can issue control instruction to the first main control unit, pass through First main control unit controls the working condition of first selecting unit, to control the defeated of the first coding unit by first selecting unit The output for entering to be switched to external or the first decoding unit is switched to outside.In the present embodiment, when network audio server issues Control instruction, when so that the first main control unit being switched to outside by the input that first selecting unit controls the first coding unit, Configuring the first input/output channel is acquisition channel, and external audio signal is input to the first coding by first selecting unit Unit is encoded, and the audio signal after coding sends the first main control unit to, and the first main control unit passes through internet communication mould Block is sent to network audio server；When network audio server issues control instruction, so that the first main control unit passes through first When the output that selecting unit controls the first decoding unit is switched to outside, that is, configuring the first input/output channel is broadcast channel, First main control unit receives the audio signal that network audio server is sent, the first master control list by the first internet communication module Member sends the audio signal that network audio server is sent to first decoding unit and is decoded, and decoded audio signal is logical It crosses first selecting unit and is output to outside；
In the present embodiment, as shown in Fig. 2, network microphone work station includes the second main control unit, the second internet communication mould Block, microphone and the second input/output channel, the second input/output channel include the second coding unit, the second decoding unit and Second selecting unit, the second main control unit connect the second internet communication module, are accessed by the second internet communication module mutual Networking and network audio server communication；The input of second coding unit and the output of the second decoding unit are separately connected the second choosing Unit is selected, the control terminal of the second selecting unit connects the second main control unit, and the second main control unit is controlled by the second selecting unit The input of second coding unit is switched to external or the second decoding unit output and is switched to outside, by the second input/output Channel is configured to broadcast channel or acquisition channel.In the present embodiment, network audio server can issue control instruction to Two main control units control the working condition of the second selecting unit by the second main control unit, so that the second selecting unit controls The input of second coding unit is switched to external or the second decoding unit output and is switched to outside.When the second main control unit passes through When the input that second selecting unit controls the second coding unit is switched to outside, that is, the second input/output channel is configured as acquisition Channel, external audio signal are input to the second coding unit by the second selecting unit and are encoded, the audio signal after coding Send main control unit to, the second main control unit is sent to network audio server by internet communication module；When the second master control When unit is switched to outside by the output that the second selecting unit controls the second decoding unit, that is, it is logical to configure the second input/output Road is broadcast channel, and the second main control unit receives the audio letter that network audio server is sent by the second internet communication module Number, the second main control unit sends the audio signal that network audio server is sent to second decoding unit and is decoded, decoding Audio signal afterwards is output to outside by the second selecting unit；After the audio input of the microphone is acquired by Acquisition Circuit It is input to the second coding unit, transmits the second main control unit after encoding by the second coding unit.
In the present embodiment, as shown in Fig. 2, network-control input unit includes third main control unit, third internet communication Module and fire-fighting signal detection unit；Third main control unit connects third internet communication module, passes through third internet communication Module accesses internet and network audio server communication；Fire-fighting signal detection unit connects external fire fighting alarm device, is used for The alarm signal that external fire fighting alarm device is sent is detected, the fire-fighting signal detection unit connects third main control unit, will examine The alarm signal measured is sent to third main control unit；Third main control unit is interconnected after receiving alarm signal by third Net communication module is sent to network audio server.
The circuit structure that device is expanded in the present embodiment network audio can be as shown in Fig. 3 a to 3d, which expands It is lotus flower joint terminal that input/output is channel attached in device, and specific structure is as follows:
First selecting unit includes the first relay 1 in each first input/output channel, and the first relay 1 includes two groups Contact, respectively first group of contact and second group of contact, first group of contact by the first normally closed stationary contact, the first normally opened stationary contact and First movable contact composition, second group of contact is made of the second normally closed stationary contact, the second normally opened stationary contact and the second movable contact；First The control terminal of relay connects the first main control unit, controls the first movable contact by the first main control unit and connects the first normally closed stationary contact Point or the first normally opened stationary contact, it is normally opened by the first main control unit the second movable contact of control the second normally closed stationary contact of connection or second Stationary contact.
The left channel audio signal decoded output of first decoding unit passes sequentially through the first power amplification circuit 2, first The first normally closed stationary contact or the first normally opened stationary contact are connected after low-pass filter 3 and the second power amplification circuit 4；First is normally opened quiet The left channel audio signal coding that coding unit is connected behind contact or the first the 5th power amplification circuit 5 of normally closed stationary contact connection is defeated Enter end, external left channel audio signal is inputted by the first normally opened stationary contact or the first normally closed stationary contact；In the present embodiment, when When the output of second power amplification circuit 4 connects the first normally closed stationary contact, then the first normally opened stationary contact connects the 5th power amplification The input of circuit 5, otherwise when the output of the second power amplification circuit 4 connects the first normally opened stationary contact, then the first normally closed stationary contact The input of point the 5th power amplification circuit 5 of connection.
The right channel audio signal decoded output of first decoding unit is sequentially connected third power amplification circuit 6, second The second normally closed stationary contact or the second normally opened stationary contact are connected after low-pass filter 7 and the 4th power amplification circuit 8, second is normally opened quiet The right channel audio signal coding that coding unit is connected behind contact or the second the 6th power amplification circuit 9 of normally closed stationary contact connection is defeated Enter end, external right channel audio signal is inputted by the second normally opened stationary contact or the second normally closed stationary contact.
In the present embodiment, it is connect in the second power amplification circuit 4 and the first relay connection line by first switch tube Pass through second switch in ground, the right channel audio signal output end of the 4th power amplification circuit 8 and the first relay connection line Pipe ground connection, the control terminal of first switch tube and second switch are separately connected the first main control unit, the first main control unit control the When one switching tube and second switch are connected, left channel audio signal and right channel audio signal will be unable to export, the present embodiment In, the first main control unit can control input/output channel by first switch tube processed and second switch and be output to external sound The audio signal for ringing equipment is mute state.
In the present embodiment, the first input/output channel passes through lotus flower terminal by the first movable contact and the second movable contact Connect external audio equipment or external sound source；As shown in Figure 3d, output and the 6th the power amplification electricity of the 5th power amplification circuit 5 The output on road 9 connects the first differential amplifier circuit 10, and the output signal end of the first differential amplifier circuit connects the first main control unit, Network audio server is sent to after carrying out analog-to-digital conversion by the first main control unit, and the signal of the first differential amplifier circuit output is made For the detection trigger signal of audio signal, network audio server is sent to after carrying out analog-to-digital conversion by the first main control unit.? In the present embodiment, the output signal of the first differential amplifier circuit is input to the first main control unit again after amplifying circuit is handled.
The circuit structure that device is expanded in the present embodiment network audio may be as shown in Fig. 3 b to 3e；The network audio is opened up It is phoenix insertion terminal that input/output is channel attached in exhibition device, and specific structure is as follows:
As shown in Figure 3 e, it further includes sinusoidal wave generation circuit that network audio, which expands device,；The input terminal of sinusoidal wave generation circuit Pulse signal is converted into sine wave signal by the pulse signal output end for connecting the first main control unit.Sine wave as shown in Figure 3 e The output end of generative circuit connects the input terminal of the second differential amplifier circuit, provides sine wave letter for the second differential amplifier circuit Number；
First selecting unit includes the first relay in each first input/output channel, and the first relay includes two groups of touchings Point, respectively first group of contact and the second contact, first group of contact is by the first normally closed stationary contact, the first normally opened stationary contact and first Movable contact composition, the second contact is made of the second normally closed stationary contact, the second normally opened stationary contact and the second movable contact；First relay Control terminal connect the first main control unit, the first movable contact is controlled by the first main control unit and connects the first normally closed stationary contact or the One normally opened stationary contact controls the second movable contact by the first main control unit and connects the second normally closed stationary contact or the second normally opened stationary contact Point；
The left channel audio signal decoded output of first decoding unit is sequentially connected the first power amplification circuit 2 and first Low-pass filter 3, the decoded right channel audio signal decoded output of the first decoding unit are sequentially connected third power amplification electricity The output end of road 6 and the second low-pass filter 7, the first low-pass filter and the second low-pass filter is separately connected the second difference and puts The input terminal of big circuit 11；
The left channel audio signal output end of second differential amplifier circuit 11 connects the first normally closed stationary contact of the first relay Point or the first normally opened stationary contact, the first normally opened stationary contact or the first normally closed stationary contact pass through the 5th power amplification circuit 5 connection the The left channel audio signal coding input end of one coding unit is inputted outer by the first normally opened stationary contact or the first normally closed stationary contact Portion's left channel audio signal；
The right channel audio signal output end of second differential amplifier circuit connects the second normally closed stationary contact of the first relay Or the second normally opened stationary contact, the second normally opened stationary contact or the second normally closed stationary contact pass through the 6th power amplification circuit 9 connection first The right channel audio signal coding input end of coding unit is inputted external by the second normally opened stationary contact or the second normally closed stationary contact Right channel audio signal.
The output end of second differential amplifier circuit is connected with operational amplification circuit.In the present embodiment, the second differential amplification It is grounded in the left channel audio signal output end of circuit and the first relay connection line by first switch tube, the second difference is put It is grounded in the right channel audio signal output end of big circuit and the first relay connection line by second switch, first switch The control terminal of pipe and second switch is separately connected the first main control unit, and the first main control unit control first switch tube and second is opened When closing pipe conducting, the left channel audio signal and right channel audio signal of the second differential amplifier circuit output will be unable to export, In this patent, the first main control unit can control input/output channel by first switch tube processed and second switch and be output to The audio signal of external audio equipment is mute state.
First input/output channel connects external speakers by phoenix insertion terminal by the first movable contact and the second movable contact Equipment or external sound source；The output of 5th power amplification circuit 5 connects the first difference with the output of the 6th power amplification circuit 9 and puts The output signal end of big circuit 10, the first differential amplifier circuit connects the first main control unit, carries out modulus by the first main control unit Send network audio server after conversion to.
As shown in Figure 3 e, the present embodiment sinusoidal wave generation circuit includes two stage power amplifier, the first stage power amplifier Including operational amplifier U20A, the second stage power amplifier includes operational amplifier U20B, and the input of operational amplifier U20A is anti- Phase end is sequentially connected the pulse signal output end that the first main control unit is connected after capacitor C97, resistance R112 and electrolytic capacitor E38 PWM_OUT；One end that capacitor C97 is connected with resistance R112 is grounded by resistance R113, while being put by capacitor C98 connection operation The output end of big device U20A；The inverting input terminal of operational amplifier U20A is defeated by resistance R114 connection operational amplifier U20A's The normal phase input end of outlet, operational amplifier U20A is grounded by resistance R115；The output end of operational amplifier U20A successively connects Connect the inverting input terminal that operational amplifier U20B is connected after capacitor C99 and resistance R118, the anti-phase input of operational amplifier U20B End connects the output end of operational amplifier U20B by capacitor C100 in parallel with resistance R119；The positive of operational amplifier U20B Input terminal is grounded by resistance R120.In the present embodiment, the first main control unit is input to the pulse letter of sinusoidal wave generation circuit Number, after sinusoidal wave generation circuit, sine wave signal, sine wave signal supply second are exported by operational amplifier U20B The input terminal of differential amplifier circuit 11.Wherein when network audio expansion device is including multiple input/output channels, such as Fig. 3 e institute Show, the sine wave that sinusoidal wave generation circuit can be generated sinusoidal wave generation circuit by multi-center selection device such as HEF4053 Signal is divided into multichannel, and each road sine wave signal inputs to second differential amplifier circuit in each input/output channel respectively.
In the present embodiment, as shown in Figure 3c, network audio expands the first decoding unit and the first coding in device structure Unit can respectively correspond coded portion and decoded portion by VS1053 codec chip to realize, network audio is expanded in device The first main control unit can use MCU, chip STM32F407VGT6 as shown in Figure 3a specifically can be used；VS1053 compiles solution The I/O port of the data input and output pin connection MCU of code chip；The left channel audio signal of VS1053 codec chip decodes Left channel audio signal decoded output of the output end LEFT as the first decoding unit, for exporting left channel audio signal solution Code signal, right sound of the left channel audio signal decoded output RIGHT of VS1053 codec chip as the first decoding unit Audio channel signal decoded output, for exporting left channel audio signal decoded signal, VS1053 codec chip L channel sound Left channel audio input terminal of the frequency Signal coding input terminal MCIP/LINE1 as the first coding unit, VS1053 codec chip Right audio channel input terminal of the right channel audio signal coding input end LINE_IN as the first coding unit.
In the present embodiment, as shown in Figure 3a, when the input/output channel that network audio expands device uses lotus flower joint terminal When, network audio expands the first moving contact of the first relay 1 and the second moving contact in device circuit structure and is connected respectively lotus The pin 3 of the pin 1 and pin 2 of fresh idea terminal, lotus flower joint terminal is grounded, and can also be at this time input/output channel setting one A accessory channel, the accessory channel connect phoenix insertion terminal.The circuit of accessory channel can be directly the circuit as described in Fig. 3 e, At this point, shown in Fig. 3 e, decoded left channel audio signal and right channel audio signal that the second differential amplifier circuit is accessed Respectively from first low-pass filter unit 3 and the second low-pass filter 7 in input/output channel；Relay shown in Fig. 3 e One of stationary contact ground connection, i.e. setting phoenix insertion terminal can only be exported, cannot be inputted in normally closed stationary contact or normally opened stationary contact.
In the present embodiment, as shown in Figure 3 e, when the input/output channel that network audio expands device uses phoenix insertion terminal When, network audio expands the first moving contact of the first relay 1 and the second moving contact in device circuit structure and is connected respectively phoenix The pin 3 of the pin 1 and pin 2 of phoenix insertion terminal, phoenix insertion terminal is grounded, at this point, can also be input/output channel setting one A accessory channel, the accessory channel connect lotus flower joint terminal.The circuit of accessory channel can be directly the circuit as described in Fig. 3 a, At this point, shown in Fig. 3 a, the second power amplifier 4 and the corresponding decoded L channel sound accessed of the 4th power amplification circuit 8 Frequency signal and right channel audio signal are respectively from first low-pass filter unit 3 in input/output channel and the second low-pass filtering Device 7；One of stationary contact can be grounded in the normally closed stationary contact or normally opened stationary contact of relay shown in Fig. 3 a, i.e. setting lotus Fresh idea terminal can only export, and cannot input.
In the present embodiment, the first input/output channel can be selected for broadcast channel or acquisition by the first relay Channel, as shown in Figure 3a, when the first main control unit controls the first movable contact and the connection of the first normally opened stationary contact of the first relay, When second movable contact and the second normally opened stationary contact connect, the first input/output channel is broadcast channel, network audio service at this time The audio signal that device is output to the first main control unit is exported after the decoding of the first decoding unit by the first input/output channel To outside.When the first main control unit controls the first movable contact and the first normally closed stationary contact connection of the first relay, the second dynamic touching When point is connected with the second normally closed stationary contact, the first input/output channel is acquisition channel at this time, and the first input/output channel is defeated The audio signal entered exports after the first coding unit coding to the first main control unit.
In the present embodiment, it further includes power amplifier fault detection circuit that network audio, which expands device, is matched for detecting Be set to external power amplifier that the first input/output channel of broadcast channel is connected whether failure；As illustrated in figure 3f, power Amplifier failures detection circuit includes third relay 12 and third photoelectrical coupler；Third relay 12 includes two groups of contacts, Respectively the 5th group of contact and the 6th group of contact, the 5th group of contact include the 5th normally closed stationary contact, the 5th normally opened stationary contact and the Five movable contacts, the 6th group of contact include the 6th normally closed stationary contact, the 6th normally opened stationary contact and the 6th movable contact；Third relay Control terminal connects main control unit, controls the 5th movable contact by main control unit and connects the 5th normally closed stationary contact or the 5th normally opened stationary contact Point controls the 6th movable contact by main control unit and connects the 6th normally closed stationary contact or the 6th normally opened stationary contact；
It is directed to the input/output channel of external power amplifier fault detection to be carried out, the 5th normally closed stationary contact and Six normally closed stationary contacts are connected respectively the audio output and sound for the external power amplifier that the input/output channel is connected Frequency public output；5th normally opened stationary contact and the 6th normally opened stationary contact are connected respectively the sound of external non-firm power amplifier Frequency output end and audio public output；5th moving contact and the 6th moving contact are being separately connected the input of third photoelectrical coupler just The output end of end and input negative terminal, third photoelectrical coupler connects main control unit；Specially as illustrated in figure 3f, third photoelectric coupling The input anode of device is sequentially connected the 5th movable contact of connection third relay 12 after resistance R185 and capacitor C135, resistance R185 The emitter of the mobile connection NPN triode Q1 7 connected with capacitor C135, the collector connection diode D25's of NPN triode Cathode, the 5th movable contact of the anode connection third relay 12 of diode D25, the base stage of triode Q17 pass through resistance R183 Connect the cathode of diode D23, the cathode of the base stage connection Transient Suppression Diode Z4 of triode Q17, Transient Suppression Diode The input negative terminal connection transient state of the input negative terminal of the anode connection third photoelectrical coupler of Z4, third photoelectrical coupler inhibits two poles Pipe Z5 anode, the emitter of the cathode connected to the transistor Q17 of Transient Suppression Diode Z5.The output plus terminal of third photoelectrical coupler Connect main control unit, the output negativing ending grounding of third photoelectrical coupler.In the present embodiment, coil one end of third relay connects The collector of triode Q19 is connect, the emitter of other end ground connection, triode Q19 is grounded, and the base stage of NPN triode Q1 9 passes through electricity R209 connection main control unit is hindered, one end that resistance R209 is connected with main control unit is grounded by resistance R210, third relay line Enclose the anode of one end connection diode D31 of connecting triode Q19 collector, the minus earth of diode D31.The present embodiment In, when main control unit connection the one end resistance R210 output be high level when, triode Q19 conducting, the line of third relay 12 Circle is powered, and the 5th movable contact of third relay connects the 5th normally opened stationary contact at this time, and the 6th movable contact of third relay connects Connect the 6th normally opened stationary contact.When the main control unit connection one end resistance R210 output be low level when, triode Q19 cut-off, the The coil no power of three relays 12, the 5th movable contact of third relay connects the 5th normally closed stationary contact, third relay at this time 6th movable contact of device connects the 6th normally closed stationary contact.
It is directed to the input/output channel of external power amplifier fault detection to be carried out, external non-firm power amplifier Other power amplifiers in addition being reconnected for the input/output channel or be as the input/output channel standby its The external power amplifier that his input/output channel is connected.When external non-firm power amplifier be input/output channel in addition When other power amplifiers reconnected, an external non-firm power amplifier can connect multiple input/output channels simultaneously Output, as power amplifier spare outside multiple input/output channels.
In the present embodiment, the testing principle that above-mentioned network audio expands device power amplifier fault detection circuit is as follows:
When network audio server sends audio signal to the first main control unit, the first main control unit is according to network audio Audio signal is sent to some the first input/output channel for being configured to broadcast channel by the order of server, and first input/ The audio signal of output channel output is output to external speakers after the external power amplifier enhanced processing of its connection again and sets It is standby.At this time in power amplifier fault detection circuit, when external power amplifier has output, the 5th of third relay is normally closed Stationary contact and the 6th normally closed stationary contact will acquire audio signal, and be believed audio by the 5th movable contact and the 6th movable contact It number is sent to third photoelectrical coupler, corresponding signal is sent after the coupling of third photoelectrical coupler to the first main control unit；First is main Control unit can according to the signal determining external power amplifier that third photoelectrical coupler is sent whether failure, when determining outside When power amplifier breaks down, then main control unit controls third relay, so that the 5th normally opened stationary contact of third relay The audio output and audio public output of external non-firm power amplifier are connected respectively with the 6th normally opened stationary contact, with Audio letter is exported for detecting whether external non-firm power amplifier breaks down, while by external non-firm power amplifier Number；In the present embodiment, when the external power that external non-firm power amplifier is connected by the first spare input/output channel When amplifier, the information that external power amplifier breaks down can be fed back to network audio server, network by main control unit Audio server reconfigures audio for its audio signal sent and expands spare the first input/output channel in device, and first Audio signal is sent to external non-firm power amplifier by the first spare input/output channel by main control unit control.When When external non-firm power amplifier is in addition power amplifier that the first input/output channel connects, the first input/output channel The audio signal of output is directly output to external non-firm power amplifier and is exported.
In the present embodiment, it further includes that 24V cuts by force circuit module and three-wire system cuts by force circuit module that network audio, which expands device,.
As shown in figure 3g, it includes the 4th relay 13 that the present embodiment 24V, which cuts by force circuit module, and the 4th relay 13 includes the Seven normally closed stationary contacts, the 7th normally opened stationary contact and the 7th movable contact；Wherein the control terminal of the 4th relay connects the first master control list Member controls the 7th movable contact by the first main control unit and connects the 7th normally closed stationary contact or the 7th normally opened stationary contact, and the 7th is normally closed Stationary contact ground connection, the 7th normally opened contact connect 24V power supply；24V cuts by force circuit module and connects external 24V power supply by the 7th movable contact Equipment is cut by force in power supply.The present embodiment 24V cuts by force the strong of the external 24V power supply power supply of circuit module connection and cuts equipment；It is fiery when occurring When alert, can control 24V power supply power supply cutting equipment obtains the power supply of 24V by force, for fighting fire dangerous situation.
As illustrated in figure 3h, it includes the 5th relay 14, the 5th relay 14 packet that the present embodiment three-wire system, which cuts by force circuit module, Include the 8th normally closed stationary contact, the 8th normally opened stationary contact and the 8th movable contact；Wherein the control terminal connection first of the 5th relay is main Unit is controlled, the 8th movable contact is controlled by the first main control unit and connects the 8th normally closed stationary contact or the 8th normally opened stationary contact；Three lines System cuts by force the common end SW_COM that circuit module connects external audio equipment volume controller by the 8th normally closed stationary contact, passes through The hot end SW_HOT of 8th normally opened stationary contact connection external audio equipment volume controller, connects external sound by the 8th movable contact Ring the urgent end SW_EM of contact sound volume controller.In the present embodiment, three-wire system cuts by force circuit module connection external audio equipment Volume controller can cut by force circuit module control external audio equipment volume controller when there is fire alarm by three-wire system It opens, the volume of audio signal of the broadcasting of external audio equipment is enabled to adjust maximum, avoid because external speakers are set The case where standby volume is turned down or is closed and do not receive fire broadcast by user.
In the present embodiment, it further includes external equipment trigger circuit that network audio, which expands device,；As shown in figure 3i, external equipment Trigger circuit includes photoelectrical coupler and the 6th relay 15；The input terminal of photoelectrical coupler connects as external signal triggering end Receive outer triggering signal；The output of photoelectrical coupler terminates the first main control unit；6th relay include the 9th normally closed stationary contact, 9th normally opened stationary contact and the 9th movable contact；Wherein the control terminal of the 6th relay connects the first main control unit, main by first It controls unit and controls the 9th movable contact the 9th normally closed stationary contact of connection or the 9th normally opened stationary contact；In the present embodiment, such as Fig. 3 i institute Show, connects DC power supply after the input anode reversal connection diode D4 of photoelectrical coupler, the input anode of photoelectrical coupler passes through anti- Connect the input negative terminal of diode D5 connection photoelectrical coupler；The input negative terminal of photoelectrical coupler is sequentially connected resistance R84 and two poles As triggering equipment such as triggering end connection external timers after pipe D6；The output plus terminal of photoelectrical coupler is connected by resistance R82 DC power supply, while the output plus terminal of photoelectrical coupler connects the first main control unit, the output negativing ending grounding of photoelectrical coupler.The In six relays 15, external equipment trigger circuit is linked into the control of external equipment by the 9th normally opened stationary contact and the 9th movable contact In circuit processed, for connecting the control loop of external equipment, wherein external equipment can be the equipment such as external definition source of sound.At this In embodiment, as shown in figure 3i, the 6th relay coil one end connects direct current 24V, and the other end connects the collection of NPN triode Q1 Electrode, the emitter ground connection of triode Q1, by the first main control unit of resistance R87 connection, resistance R87 connects the base stage of triode Q1 The one end for connecing the first main control unit is grounded by resistance R90, the coil one end reversal connection two being electrically connected in the 6th relay with direct current The collector of connecting triode Q1 after pole pipe D9.
In the present embodiment, the input negative terminal of the photoelectrical coupler of external equipment trigger circuit after receiving the trigger signal, The output plus terminal of photoelectrical coupler will have high level signal to be sent to the first main control unit, and the first main control unit receives photoelectricity coupling After the high level signal that clutch is sent, it is determined with external trigger, the first main control unit exports high level signal to triode at this time The base stage of Q1, triode Q1 conducting, 15 coil of the 6th relay are powered, the 9th normally opened stationary contact and the connection of the 9th movable contact, from And the control loop of external equipment is connected, such as external equipment is worked, such as make external definition source of sound output audio letter Number.
In the present embodiment, network audio expands device and is also provided with the screen connecting with the first main control unit.
In the present embodiment, in network microphone work station, as shown in Figure 4 b, the second selection in each second input/output channel Unit includes the second relay 16, and the second relay includes two groups of contacts, respectively third group contact and the 4th group of contact, third Group contact is made of the normally closed stationary contact of third, the normally opened stationary contact of third and third movable contact, and the 4th group of contact is normally closed quiet by the 4th Contact, the 4th normally opened stationary contact and the 4th movable contact composition；The control terminal of second relay connects the second main control unit, by the Two main control units control the normally closed stationary contact of third movable contact connection third or the normally opened stationary contact of third, pass through the second main control unit control It makes the 4th movable contact and connects the 4th normally closed stationary contact or the second normally opened stationary contact.
As shown in Fig. 4 a to 4e, the left channel audio signal decoded output of the second decoding unit is sequentially connected the 7th power The normally closed stationary contact of third or the normally opened stationary contact of third are connected after amplifying circuit 17 and the 8th power amplification circuit 18；Third is normally opened quiet The input of contact or the normally closed stationary contact connection third differential amplifier circuit 19 of third；The decoded right audio channel of second decoding unit Connection the 4th is normally closed quiet after signal decoded output is sequentially connected the 9th power amplification circuit 20 and the tenth power amplification circuit 21 Contact or the 4th normally opened stationary contact, the 4th normally opened stationary contact or the 4th normally closed stationary contact connect the defeated of third differential amplifier circuit 19 Enter, the input terminal of the output connection coding unit of third differential amplifier circuit 19 is normally closed by the 4th normally opened stationary contact or the 4th Stationary contact inputs external audio signal.Second input/output channel connects external sound by third movable contact and the 4th movable contact Ring equipment or external sound source；
As illustrated in fig. 4 c, the signal that third differential amplifier circuit 19 exports passes through the 11st power amplification circuit 22 connection the Two main control units send network audio server to after carrying out analog-to-digital conversion by the second main control unit, are used as detection trigger signal.
As shown in Fig. 4 c and 4d, the left channel audio signal input and right channel audio signal input of microphone are by acquisition The left channel audio signal coding input end and right channel audio signal that the second coding unit is respectively outputted to after circuit acquisition are compiled Code input terminal, transmits the second main control unit after encoding by the second coding unit；As shown in figure 4d, while the L channel of microphone Audio signal input is output in the 12nd power amplification circuit 23 after Acquisition Circuit acquires, the 12nd power amplification circuit 23 output ends connect the second main control unit, send net to after the signal of the 12nd power amplification circuit output is carried out analog-to-digital conversion Network audio server is used as detection trigger signal.
In the present embodiment, as shown in figure 4d, the Acquisition Circuit of microphone includes inductance L4, inductance L5, PNP triode Q3 With NPN triode Q4；Wherein the left channel audio signal input terminal of the one end inductance L5 connection microphone, the one end inductance L4 connect wheat The left channel audio signal input terminal of gram wind；The inductance L5 other end connects the anode of electrolytic capacitor E17, inductance by resistance R34 The L4 other end passes through the anode of resistance R35 connection electrolytic capacitor E17, the negativing ending grounding of electrolytic capacitor E17；Electrolytic capacitor E17's Anode passes through the collector of resistance R33 connecting triode Q3, and the emitter of triode Q3 connects DC power supply, the base of triode Q3 By resistance R30 connection DC power supply, the base stage of triode Q3 passes through the collector of resistance R29 connecting triode Q4, three poles for pole The emitter of pipe Q4 is grounded, and by the second main control unit of resistance R27 connection, the base stage of triode Q4 passes through the base stage of triode Q4 Resistance R28 ground connection.Capacitor C30 is connected between the inductance L5 other end and the inductance L4 other end, the inductance L5 other end connects capacitor One end of C93, left channel audio signal output end of the other end of capacitor C93 as Acquisition Circuit；4 other end of inductance connection electricity Hold one end of C93, right channel audio signal output end of the other end of capacitor C83 as Acquisition Circuit.
In the present embodiment, as shown in fig 4e, the second decoding unit and the second coding in network microphone work station structure Unit can respectively correspond coded portion and decoded portion by VS1053 codec chip to realize, in network microphone work station The second main control unit can use MCU, chip STM32F407VGT6 as shown in fig. 4 a specifically can be used；VS1053 compiles solution The I/O port of the data input and output pin connection MCU of code chip；The left channel audio signal of VS1053 codec chip decodes Left channel audio signal decoded output of the output end LEFT as the second decoding unit, for exporting left channel audio signal solution Code signal, right sound of the right channel audio signal decoded output RIGHT of VS1053 codec chip as the second decoding unit Audio channel signal decoded output, for exporting right channel audio signal decoded signal, VS1053 codec chip L channel sound Left channel audio input terminal of the frequency Signal coding input terminal MCIP/LINE1 as the second coding unit, VS1053 codec chip Right audio channel input terminal of the right channel audio signal coding input end LINE_IN as the second coding unit.
In the present embodiment, the second input/output channel can be selected for broadcast channel or acquisition by the second relay Channel, as shown in Figure 4 b, when the second main control unit control the second relay third movable contact connected with the normally opened stationary contact of third, 4th movable contact and the 4th normally opened stationary contact connection, the second input/output channel is broadcast channel, network audio server at this time The audio signal for being output to the second main control unit is output to after the decoding of the second decoding unit by the second input/output channel It is external.When the second main control unit control the second relay third movable contact connected with the normally opened stationary contact of third, the 4th movable contact When connecting with the 4th normally opened stationary contact, the second input/output channel is acquisition channel, the input of the second input/output channel at this time Audio signal by the second coding unit coding after output to the first main control unit.
As shown in fig. 4f, network microphone work station further includes loudspeaker, the L channel of the second decoding unit in the present embodiment Audio signal decoding output end and right channel audio signal decoded output are connected respectively to loudspeaker by power amplification circuit Two input terminals, amplifying circuit described above can realize by PAM8302 audio-frequency power amplifier.
The present embodiment network microphone work station further includes touch screen connected to the main control unit and for storing local music Storage card；Main control unit acquires the audio signal in storage card by Acquisition Circuit, is then sent to network audio server Or external speakers are sent to by the second input/output channel.Net can be sent to for the catalogue of program request in network audio server It network microphone work station and is shown in touch screen, user can be by the program request catalogue on touch screen to network audio server Send on-demand request.
In the present embodiment, network microphone work station can send the local audio signal of storage to network audio service Device is sent to external audio equipment by broadcast channel and plays out, the loudspeaker being arranged in network microphone work station.This reality Applying a network microphone work station can be set to general network microphone work station or fire emergency network microphone work station；Network audio Frequency server can set the priority of fire emergency network microphone work station microphone audio signal collected to highest； When receiving fire emergency network microphone work station microphone audio signal collected, control network is set network audio server Standby corresponding broadcast channel preferentially plays the audio signal.Therefore when there is fire alarm generation, related personnel can be tight by fire-fighting Anxious network microphone work station artificially plays the message such as escape.As it can be seen that the multiple functions of network microphone work station collection in the present embodiment In one, have the advantages that powerful.
In the present embodiment network-control input unit, as shown in figure 5a and 5b, fire-fighting signal detection unit includes data Selector, the address end of data selector and enable end are separately connected third main control unit, each input letter of data selector Number end is separately connected each road signal deteching circuit；Wherein, every road signal deteching circuit includes resistance, first diode and the two or two Pole pipe, wherein one end of resistance connects DC power supply, and the other end connects the anode of first diode, and the cathode of first diode connects Connect the cathode of the second diode, the plus earth of the second diode, inspection of the anode of first diode as signal deteching circuit Survey the alarm signal output ends that end connects external fire fighting alarm device；In each road signal deteching circuit, resistance and first diode Anode connection one end connection data selector input signal end；The signal output end of data selector connects third master control Unit.In the present embodiment, as shown in figure 5a and 5b, 32 road signal deteching circuits are set, are detected respectively according to demand differently The alarm signal of side；Data selector uses 4 74HC4051 chips, 8 input signal ends point of each 74HC4051 chip 8 road signal deteching circuits are not connected, and the enable end end INH of each 74HC4051 chip and address end A, B, C-terminal are separately connected Each I/O port of third main control unit, the same IO of the signal output end connection third main control unit of each 74HC4051 chip Port, it is enabled that third main control unit controls each 74HC4051 chip periodicity, and each 74HC4051 chip makes every time Can when, address end A, B, C successively change to 111 from 000, therefore 4 74HC4051 chips of third main control unit periodic scan 32 input signal ends, third main control unit when receiving alarm signal, according to currently enabled 74HC4051 chip and 74HC4051 chip address is available to come to alarm signal for which road signal deteching circuit, is produced to get alarm signal Raw region.
Third control unit can use MCU in the present embodiment, and chip STM32 as shown in Figure 5 a specifically can be used. In the present embodiment, third control unit can also connect fire tower screen.
First in the device of network audio expansion in the present embodiment, network microphone work station and network-control input unit is mutual Combined network communication module, the second internet communication module and third internet communication module are ethernet interface module, Ethernet Interface module is mainly made of ethernet PHY chip DP83848VYB and network transformer.
In the present embodiment IP network broadcaster, network audio server is for network equipment progress IP address and extensively Broadcast the configuration of channel and acquisition channel；And broadcasting tasks and acquisition tasks are created, receives and is talked about from network microphone work station The audio signal of cylinder input；When executing broadcasting, network server is by audio signal, the network microphone work in broadcasting tasks Issued audio signal of standing is sent to the corresponding network equipment in institute's configuration broadcast channel；Passed through by the network equipment corresponding wide It broadcasts channel and is sent to external audio equipment and play out；When executing collecting work, the correspondence net that acquisition tasks are configured is received Network equipment acquisition channel audio signal collected.In the present embodiment, when creating broadcasting tasks, it can configure according to demand pair The broadcast channel of the network equipment of audio zone is answered, while being directed to the audio signal that network microphone work station microphone is inputted, net Network audio server can also configure the broadcast channel of the network equipment of corresponding audio zone according to the demand of broadcasting.
In the broadcast of the present embodiment IP network, network audio server is believed when creating broadcasting tasks for audio therein Number priority is set, likewise, being directed to network microphone work station microphone audio signal setting priority collected；Work as net Network audio server will be sent to the audio signal of the same broadcast channel of the network equipment when being multichannel, first determine each road audio letter Number priority, the audio signal of highest priority is sent to the broadcast channel of the network equipment by selection.
The working principle of above-mentioned IP network broadcaster is as follows in the present embodiment:
Network audio server is each network equipments configuration IP address, can recognize that the network equipment of access internet IP address, and the information such as IP address, state and attribute of the network equipment that access internet is recorded.
Network audio server issues control instruction to the network equipment, broadcast channel when with the work of Configuration network equipment and Acquisition channel；Broadcast channel refers to that the network equipment issues audio signal to the channel of external equipment；Acquisition channel refers to net The channel of network equipment acquisition external equipment audio signal.Such as network audio server issues control instruction and expands to network audio In device, the working condition of first selecting unit is controlled by the first main control unit, so that the input of the first coding unit is switched to External or the first decoding unit output is switched to outside, configures broadcast channel or acquisition for the first input/output channel Channel；Such as network audio server issues control instruction in network microphone work station, is controlled by the second main control unit Second selecting unit, so that the input of the second coding unit is switched to external or the second decoding unit output and is switched to outside, To configure broadcast channel or acquisition channel for the second input/output channel.
Network audio server creates broadcasting tasks and acquisition tasks, and is the audio signal in each broadcasting tasks of creation Set priority；The broadcast channel of Configuration network equipment is respectively corresponded for each broadcasting tasks and acquisition tasks simultaneously and acquisition is led to Road；For the broadcast channel of network microphone work station microphone audio signal Configuration network equipment collected.In the present embodiment, extensively The task of broadcasting includes fixed time broadcast task, instant broadcasting tasks, channel broadcasting task and urgent broadcast task.Fixed time broadcast task refers to Be timing play broadcasting tasks；Instant broadcasting tasks refer to the broadcasting tasks that temporary needs plays；Channel broadcasting task Refer to selected after recycle the broadcasting tasks played out；Urgent broadcast task include configured by fire-fighting etc. it is more urgent Broadcasting tasks；In the present embodiment, it is wide that urgent broadcast task, instant broadcasting tasks, fixed time broadcast task and channel can be set The audio signal for broadcasting task is respectively from high to low.In the present embodiment, the audio signal of broadcasting tasks is created from audio Institute under the audio file or acquisition tasks that are converted into after audio file, text input to network audio server in server Collected audio signal.
Network audio server executes collecting work, receives the corresponding network equipment acquisition channel institute that acquisition tasks are configured The audio signal of acquisition.When the acquisition channel that acquisition tasks are configured is the acquisition channel that network audio is expanded in device, network Audio expands device and passes through the audio signal for corresponding to acquisition channel reception external sound source transmission thereon, passes through internet after being encoded Send network audio server to；When the acquisition channel that acquisition tasks are configured is the acquisition channel in network microphone work station When, network microphone work station passes through corresponding acquisition channel and acquires the audio signal that external sound source is sent, by mutual after being encoded Networking sends network audio server to.Meanwhile network microphone work station will pass through after microphone audio-frequency signal coding collected Internet transmission gives network audio server；
Network audio server executes broadcasting, and audio signal is sent to the broadcasting tasks according to broadcasting tasks and is matched Network microphone work station microphone audio signal collected is sent to the work of network microphone by the broadcast channel for the network equipment set It stands the broadcast channel of the configured network equipment, so that the network equipment is after receiving audio signal, after audio signal decoding External audio equipment is sent to by broadcast channel to play out；Wherein when the same broadcast channel of the network equipment to be sent to When audio signal is multichannel, the priority of each road audio signal is determined, the audio signal of highest priority is sent to net by selection The broadcast channel of network equipment.When the broadcast channel that broadcasting tasks are configured is the broadcast channel that network audio expands device, net After network audio expands the audio signal that device receives the transmission of network audio server, corresponding broadcast will be passed through after audio signal decoding Channel is sent to external audio equipment and plays out.When the broadcast channel that broadcasting tasks are configured is the wide of network microphone work station When broadcasting channel, network microphone work station receives the audio signal that network audio server is sent, and will pass through after audio signal decoding Corresponding broadcast channel is sent to external audio equipment and plays out or played out by built-in playback equipment.
Each network microphone work station for accessing internet can be established and other network microphones by network audio server The intercom of work station, it is specific as follows；Network microphone work station sends intercom calls and requests to give network audio server, it is desirable that Intercommunication is carried out with other network microphone work stations；Network audio server receives network microphone work station to other network microphones The intercom calls of work station are requested, and after the intercom calls request for receiving call network microphone work station, send call audio Signal establishes communication, the network of calling after called network microphone work station response to called network microphone work station Microphone work station and called network microphone work station send audio signal and send other side to by network audio server.
Network-control input unit receives the alarm signal of external fire fighting alarm device, and will receive alarm signal hair It send to network audio server；Network audio server response to network controls the alarm signal that input unit issues, and is receiving After alarm signal, identify alarm signal from region, according to alarm signal from region execute corresponding broadcast Corresponding audio signal is sent to the broadcast channel of the network equipment by task.In the present embodiment, network-control input unit The alarm signal for being sent to network audio server carries alarm signal generation area information, and network audio server is receiving To network-control input unit send information when, can recognize that alarm signal generation area information, therefore network audio is taken in small doses at short intervals Being engaged in device can be for the broadcast of the anti-raw region progress fire alarm dangerous situation of alarm signal.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.

Claims (10)

1. a kind of IP network broadcaster, which is characterized in that including network audio server and the network equipment, the network equipment includes Network audio expands device, network-control input unit and network microphone work station；The network equipment connects network audio by internet Frequency server；
Network audio expand device include the first main control unit, the first internet communication module and the first input/output channel, first Main control unit accesses internet and network audio server communication by the first internet communication module；First input/output is logical Road includes the first coding unit, the first decoding unit and first selecting unit, and the output of the first coding unit connects the first master control The input of unit, the first decoding unit connects the first main control unit；The input of first coding unit is defeated with the first decoding unit It is separately connected first selecting unit out, the control terminal of first selecting unit connects the first main control unit, and the first main control unit passes through Control first selecting unit the input of the first coding unit be switched to external or the first decoding unit output to be switched to outside The first input/output channel is configured broadcast channel or acquisition channel by portion；
Network microphone work station includes that the second main control unit, the second internet communication module, microphone and the second input/output are logical Road, the second input/output channel include the second coding unit, the second decoding unit and the second selecting unit, the second main control unit The second internet communication module is connected, internet and network audio server communication are accessed by the second internet communication module； The input of second coding unit and the output of the second decoding unit are separately connected the second selecting unit, the control of the second selecting unit The second main control unit of end connection, the second main control unit are switched to outer by the input that the second selecting unit controls the second coding unit The output of portion or the second decoding unit is switched to outside, configures broadcast channel for the second input/output channel or acquisition is logical Road；The audio input of microphone is input to the second coding unit after acquiring by Acquisition Circuit, is encoded by the second coding unit After transmit the second main control unit；
Network-control input unit includes third main control unit, third internet communication module and fire-fighting signal detection unit；The Three main control units connect third internet communication module, access internet by third internet communication module and are taken in small doses at short intervals with network audio Business device communication；Fire-fighting signal detection unit connects external fire fighting alarm device, and fire-fighting signal detection unit connects third master control list Member, the alarm signal that will test are sent to third main control unit；Third main control unit passes through after receiving alarm signal Three internet communication modules are sent to network audio server.
2. IP network broadcaster according to claim 1, which is characterized in that network audio is expanded in device, and each first is defeated Enter/output channel in first selecting unit include the first relay, the first relay include two groups of contacts, respectively first group of touching Point and second group of contact, first group of contact are made of the first normally closed stationary contact, the first normally opened stationary contact and the first movable contact, and second Group contact is made of the second normally closed stationary contact, the second normally opened stationary contact and the second movable contact；The control terminal of first relay connects First main control unit controls the first movable contact by the first main control unit and connects the first normally closed stationary contact or the first normally opened stationary contact Point controls the second movable contact by the first main control unit and connects the second normally closed stationary contact or the second normally opened stationary contact；
The left channel audio signal decoded output of first decoding unit passes sequentially through the first power amplification circuit, the first low pass filtered The first normally closed stationary contact or the first normally opened stationary contact are connected after wave device and the second power amplification circuit；First normally opened stationary contact or The left channel audio signal coding input end of the first coding unit is connected after one the 5th power amplification circuit of normally closed stationary contact connection, External left channel audio signal is inputted by the first normally opened stationary contact or the first normally closed stationary contact；
The right channel audio signal decoded output of first decoding unit is sequentially connected third power amplification circuit, the second low pass filtered Connect the second normally closed stationary contact or the second normally opened stationary contact after wave device and the 4th power amplification circuit, the second normally opened stationary contact or the The right channel audio signal coding input end of the first coding unit is connected after two the 6th power amplification circuits of normally closed stationary contacts connection, External right channel audio signal is inputted by the second normally opened stationary contact or the second normally closed stationary contact；
First input/output channel connects external audio equipment or external sound source by the first movable contact and the second movable contact；
The output of 5th power amplification circuit connects the first differential amplifier circuit with the output of the 6th power amplification circuit, and first is poor The output signal end of amplifying circuit is divided to connect the first main control unit.
3. IP network broadcaster according to claim 1, which is characterized in that network audio is expanded in device, the first input/ Output channel further includes sinusoidal wave generation circuit；The input terminal of sinusoidal wave generation circuit connects the pulse signal of the first main control unit Pulse signal is converted into sine wave signal by output end；
First selecting unit includes the first relay in first input/output channel, and the first relay includes two groups of contacts, respectively For first group of contact and the second contact, first group of contact is by the first normally closed stationary contact, the first normally opened stationary contact and the first movable contact Composition, the second contact is made of the second normally closed stationary contact, the second normally opened stationary contact and the second movable contact；The control of first relay The first main control unit of end connection, it is normally opened by the first main control unit the first movable contact of control the first normally closed stationary contact of connection or first Stationary contact controls the second movable contact by the first main control unit and connects the second normally closed stationary contact or the second normally opened stationary contact；
The left channel audio signal decoded output of first decoding unit is sequentially connected the first power amplification circuit and the first low pass Filter, the decoded right channel audio signal decoded output of the first decoding unit are sequentially connected the second power amplification circuit and The output end of two low-pass filters, the first low-pass filter and the second low-pass filter is separately connected the second differential amplifier circuit Input terminal；
The left channel audio signal output end of second differential amplifier circuit connects the first normally closed stationary contact or the of the first relay One normally opened stationary contact, the first normally opened stationary contact or the first normally closed stationary contact are single by the first coding of the 5th power amplification circuit connection The left channel audio signal coding input end of member inputs external L channel by the first normally opened stationary contact or the first normally closed stationary contact Audio signal；
The right channel audio signal output end of second differential amplifier circuit connects the second normally closed stationary contact or the of the first relay Two normally opened stationary contacts, the second normally opened stationary contact or the second normally closed stationary contact are single by the first coding of the 6th power amplification circuit connection The right channel audio signal coding input end of member inputs external right channel by the second normally opened stationary contact or the second normally closed stationary contact Audio signal；
First input/output channel connects external audio equipment or external sound source by the first movable contact and the second movable contact；
The output of 5th power amplification circuit connects the first differential amplifier circuit with the output of the 6th power amplification circuit, and first is poor Divide the output signal end of amplifying circuit to connect the first main control unit, sends network to after carrying out analog-to-digital conversion by the first main control unit Audio server；
The output end of sinusoidal wave generation circuit connects the input terminal of the second differential amplifier circuit, provides for the second differential amplifier circuit Sine wave signal.
4. IP network broadcaster according to any one of claim 1 to 3, which is characterized in that network audio expands device In, it further include power amplifier fault detection circuit, for detecting the first input/output channel institute for being configured as broadcast channel The external power amplifier of connection whether failure；Power amplifier fault detection circuit includes third relay and third photoelectricity coupling Clutch；Third relay includes two groups of contacts, respectively the 5th group of contact and the 6th group of contact, and the 5th group of contact includes 5 constant virtues Stationary contact, the 5th normally opened stationary contact and the 5th movable contact are closed, the 6th group of contact includes the 6th normally closed stationary contact, the 6th normally opened stationary contact Point and the 6th movable contact；The control terminal of third relay connects the first main control unit, dynamic by the first main control unit control the 5th Contact connects the 5th normally closed stationary contact or the 5th normally opened stationary contact, controls the 6th movable contact connection the 6th by the first main control unit Normally closed stationary contact or the 6th normally opened stationary contact；
It is directed to the first input/output channel of external power amplifier fault detection to be carried out, the 5th normally closed stationary contact and Six normally closed stationary contacts are connected respectively the audio output and sound for the external power amplifier that the input/output channel is connected Frequency public output；5th normally opened stationary contact and the 6th normally opened stationary contact are connected respectively the sound of external non-firm power amplifier Frequency output end and audio public output；5th moving contact and the 6th moving contact are being separately connected the input of third photoelectrical coupler just The output end of end and input negative terminal, third photoelectrical coupler connects the first main control unit；
It is directed to the first input/output channel of external power amplifier fault detection to be carried out, external non-firm power amplifier The power amplifier that in addition reconnects for the first input/output channel is as the first input/output channel standby The external power amplifier that is connected of the first input/output channel.
5. IP network broadcaster according to any one of claim 1 to 3, which is characterized in that network audio expands device In, it further include that 24V cuts by force circuit module；
It includes the 4th relay that 24V, which cuts by force circuit module, and the 4th relay includes the 7th normally closed stationary contact, the 7th normally opened stationary contact With the 7th movable contact；Wherein the control terminal of the 4th relay connects the first main control unit, passes through the first main control unit control the 7th Movable contact connects the 7th normally closed stationary contact or the 7th normally opened stationary contact, the 7th normally closed stationary contact ground connection, and the 7th normally opened contact meets 24V Power supply；24V cuts by force circuit module and cuts equipment by force by the external 24V power supply power supply of the 7th movable contact connection.
6. IP network broadcaster according to any one of claim 1 to 3, which is characterized in that network audio expands device In, it further include that three-wire system cuts by force circuit module；
It includes the 5th relay that three-wire system, which cuts by force circuit module, and the 5th relay includes the 8th normally closed stationary contact, the 8th normally opened quiet Contact and the 8th movable contact；Wherein the control terminal of the 5th relay connects the first main control unit, is controlled by the first main control unit 8th movable contact connects the 8th normally closed stationary contact or the 8th normally opened stationary contact；It is normally closed quiet by the 8th that three-wire system cuts by force circuit module Contact connects the common end COM of external audio equipment volume controller, connects external audio equipment by the 8th normally opened stationary contact The hot end of volume controller connects the urgent end of external audio equipment volume controller by the 8th movable contact.
7. IP network broadcaster according to any one of claim 1 to 3, which is characterized in that network audio expands device In, it further include external equipment trigger circuit；External equipment trigger circuit includes photoelectrical coupler and the 6th relay；Photoelectric coupling The input terminal of device receives outer triggering signal as external signal triggering end；The output of photoelectrical coupler terminates the first master control list Member；6th relay includes the 9th normally closed stationary contact, the 9th normally opened stationary contact and the 9th movable contact；The wherein control of the 6th relay End processed connects the first main control unit, controls the 9th movable contact by the first main control unit and connects the 9th normally closed stationary contact or the 9th often Open stationary contact；In 6th relay, external equipment trigger circuit is linked into outer by the 9th normally opened stationary contact and the 9th movable contact In the control loop of portion's equipment, for connecting the control loop of external equipment.
8. IP network broadcaster according to claim 1, which is characterized in that in network microphone work station, the second input/ The second selecting unit includes the second relay in output channel, and the second relay includes two groups of contacts, respectively third group contact With the 4th group of contact, third group contact is made of the normally closed stationary contact of third, the normally opened stationary contact of third and third movable contact, and the 4th group Contact is made of the 4th normally closed stationary contact, the 4th normally opened stationary contact and the 4th movable contact；The control terminal connection the of second relay Two main control units control third movable contact by the second main control unit and connect the normally closed stationary contact of third or the normally opened stationary contact of third, The 4th movable contact, which is controlled, by the second main control unit connects the 4th normally closed stationary contact or the second normally opened stationary contact；
The left channel audio signal decoded output of second decoding unit is sequentially connected the 7th power amplification circuit and the 8th power The normally closed stationary contact of third or the normally opened stationary contact of third are connected after amplifying circuit；The normally opened stationary contact of third or the normally closed stationary contact of third connect Connect the input of third differential amplifier circuit；The decoded right channel audio signal decoded output of second decoding unit is sequentially connected The 4th normally closed stationary contact or the 4th normally opened stationary contact are connected after nine power amplification circuits and the tenth power amplification circuit, the 4th is normally opened The input of stationary contact or the 4th normally closed stationary contact connection third differential amplifier circuit, the output connection of third differential amplifier circuit the The input terminal of two coding units inputs external audio signal by the 4th normally opened stationary contact or the 4th normally closed stationary contact；
Second input/output channel connects external audio equipment or external sound source by third movable contact and the 4th movable contact；
The signal of third differential amplifier circuit output connects the second main control unit by the 11st power amplification circuit, main by second Control unit sends network audio server to after carrying out analog-to-digital conversion；
The left channel audio signal input and right channel audio signal input of microphone export respectively after Acquisition Circuit acquires To the left channel audio signal coding input end and right channel audio signal coding input end of the second coding unit, compiled by second The second main control unit is transmitted after code cell encoding；The left channel audio signal of microphone inputs after Acquisition Circuit acquires simultaneously It is output in the 12nd power amplification circuit, the 12nd rate amplification circuit output end connects the second main control unit, by the 12nd function The signal of rate amplifying circuit output sends network audio server to after carrying out analog-to-digital conversion.
9. IP network broadcaster according to claim 8, which is characterized in that network microphone work station further includes loudspeaking Device, the left channel audio signal decoded output and right channel audio signal decoded output of the second decoding unit are put by power Big circuit is connected respectively to two input terminals of loudspeaker；
Network microphone work station further includes the touch screen connecting with the second main control unit；
Network microphone work station further includes the storage card for being also used to store local music；Second main control unit acquires in storage card Audio signal is then sent to network audio server or is sent to outside by the second input/output channel after decoding Sound equipment.
10. IP network broadcaster according to claim 1, which is characterized in that in network-control input unit, fire-fighting letter Number detection unit includes data selector, and the address end of data selector and enable end are separately connected third main control unit, data Each input signal end of selector is separately connected each road signal deteching circuit；Wherein, every road signal deteching circuit include resistance, First diode and the second diode, wherein one end of resistance connects DC power supply, and the other end connects the anode of first diode, The cathode of first diode connects the cathode of the second diode, and the anode of the plus earth of the second diode, first diode is made The alarm signal output ends of external fire fighting alarm device are connected for the test side of signal deteching circuit；Each road signal deteching circuit In, the input signal end for one end connection data selector that resistance is connected with the anode of first diode；The letter of data selector Number output end connects third main control unit.
CN201920174375.8U 2019-01-31 2019-01-31 IP network broadcaster Active CN209313845U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022193473A1 (en) * 2021-03-17 2022-09-22 广州市保伦电子有限公司 Pipeline-based audio broadcasting method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022193473A1 (en) * 2021-03-17 2022-09-22 广州市保伦电子有限公司 Pipeline-based audio broadcasting method

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