CN102592629B - Intrinsically safe network voice controller for mining - Google Patents
Intrinsically safe network voice controller for mining Download PDFInfo
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- CN102592629B CN102592629B CN201210056891.3A CN201210056891A CN102592629B CN 102592629 B CN102592629 B CN 102592629B CN 201210056891 A CN201210056891 A CN 201210056891A CN 102592629 B CN102592629 B CN 102592629B
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Abstract
The invention discloses an intrinsically safe network voice controller for mining, comprising a CPU (central processing unit) circuit, wherein the CPU circuit is respectively connected with a network processing circuit, an SD (Secure Digital Memory) card circuit, two paths of audio coding and decoding circuits, an audio drive circuit and a power supply circuit for supplying power, the two paths of audio coding and decoding circuits are connected with at least one path of audio interfaces through the audio drive circuit, and the SD card circuit is directly connected with the audio coding and decoding circuits. The intrinsically safe network voice controller for mining, disclosed by the invention, is a part of underground digital broadcast of a coal mine, the digital broadcast is transmitted by a network, so that the signal to noise ratio is high, the transmission distance is far, and the digital broadcast has an advantage incomparable to that of the traditional constant pressure broadcast method. The intrinsically safe network voice controller for mining is suitable for such occasions as an underground sidewalk of mine, a parking place and a rest room, etc.
Description
Technical field
The present invention relates to a kind of Mine-used I. S voice-over-net controller.
Background technology
Broadcast traditional at present can not meet the needs of underground coal mine broadcast.Traditional 1. level pressure transmission affects by factors such as linear transformer bandwidth, loudspeaker size, cable diameter, and frequency range is at 200HZ-12KHZ, and degree of distortion is large, cannot realize stereo transmission; 2. program capacity is little, and can not addressing control, a line can only transmit a programs, cannot meet broadcast and sectorization broadcast simultaneously, cannot realize point-to-point addressable broadcast.3. source of sound is all adopt simulation source of sound substantially, cannot play digital format audio file, cannot realize automatic broadcasting, automatically control.Rated power broadcast is all carry out designing according to the principle of power match and impedance matching, terminates once system wiring is installed, and the capacity that power expands is very limited, and program capacity also cannot expand.
Summary of the invention
The object of the invention is for overcoming above-mentioned the deficiencies in the prior art, a kind of Mine-used I. S voice-over-net controller is provided.
For achieving the above object, the present invention adopts following technical proposals:
It comprises cpu circuit, cpu circuit is connected with network processing circuitry, SD card circuit, two-way audio coding-decoding circuit, audio drive circuitry and the power circuit for powering respectively, two-way audio coding-decoding circuit is connected with at least one road audio interface through described audio drive circuitry, and described SD card circuit is directly connected with audio coding decoding circuit.
In order to improve audio driven ability, audio drive circuitry is connected with at least one road audio interface.
Described SD card circuit is directly connected by SPI interface with audio coding decoding circuit.SD card circuit is connected the audio file stream that can realize SD card exports and directly enters coding-decoding circuit without cpu circuit with coding-decoding circuit, the consumption to CPU internal memory can be reduced like this, make CPU can process more thing simultaneously, also ensure that the continuity of music, encoding and decoding time and real music reproduction time mate more simultaneously.Avoid, due to the phenomenon that the music produced CPU to consume a large amount of internal memory during processing its task or accident " gets stuck ".
Described audio drive circuitry is also connected with cpu circuit, and CPU by controlling driving circuit, can control the switching of audio frequency input/output signal and cut-offfing.Audio drive circuitry is connected with cpu circuit, and an effect is by CPU initialization audio drive circuitry.Another effect is the controllability strengthening audio drive circuitry.Contain the audio signal circuit that will play giving audio amplifier and the MIC voice signal circuit transmitted by audio amplifier in audio drive circuitry, being connected with CPU can realize issuing audio frequency and upload the functions such as freely the switching of audio frequency, switch, passback.
Described audio interface is 4 tunnels.
Described power circuit is also connected with cascade device power interface.
Power circuit provides stabilized voltage supply for interlock circuit, controls audio coding decoding and audio drive circuitry, the audio data on network or SD card is issued and broadcast out by audio amplifier by cpu circuit.
The automatically-monitored equipment that mining voice-over-net controller is is core with codec chip and microprocessor.Have network transmitting-receiving, audio file codec functions, stores mp3 file.The audio digital signals that host computer transmits can be accepted, and be decoded into simulating signal and send to audio amplifier.It is the intelligent information terminal of audio amplifier and ground central station.Voice-over-net controller is input that this is mining, the carrying exporting source of sound and transferring equipment, can off line be used alone, also can with management host computer with the use of.
Mine-used I. S voice-over-net controller of the present invention, is the important component part of underground coal mine broadcaster, is applicable to the places such as mine down-hole walkway, parking lot, rest room, coal face.The order transmitted by the server software of network reception host computer and data of propagandaing directed to communicate, perform corresponding operating.By sound signal by decoder transfers to Mine-used I. S broadcaster audio amplifier, for underground labour music, security knowledge education, emergency notice broadcast are provided, down-hole propagandas directed to communicate.The MIC signal that mine intrinsic safety type sound box transmits can also be received, by this analog voice signal playback and convert to ADPCM coding digital signal upload to host computer.
This voice-over-net controller mainboard take STM32F103 as hardware foundation.STM32F103 is the ARM microprocessor of advanced cotexM3 kernel, and this family chip is powerful, good stability, antijamming capability are strong, temperature range is wide, low in energy consumption, is the ideal chose of down-hole application.
The built-in system software of mining voice-over-net controller adopts the embedded OS usocII that real-time is very strong, and has transplanted FatFs file system and TCP/UDP IP stack in a program.
One of critical function of this is mining voice-over-net controller controls the audio codec on mine intrinsic safety type sound box, Code And Decode is carried out to SD card sound intermediate frequency file, the order that host computer passed is resolved simultaneously, sub-argument goes out command word and data, is carried out decoding and playing by the voice data transmitted.After the signal that down-hole sound equipment MIC triggers being detected, stop the audio file playing, and be switched to playback function by the voice reproducing in MIC to other sound equipments, and this audio coding is become adpcm code, send out uploading instructions to host computer and the audio file packing after coding is uploaded to host computer.Under normal circumstances at set intervals after host computer whether send " heartbeat " bag Sampling network voice controller online, owing to there being multiple controller in system, be mounted on network with the form of different IP simultaneously, so, each heartbeat packet can recover IP address own, the information such as MAC.Process for audio file comprises the scanning to audio file on SD card.Apply for that audio file play list is deposited in space according to the number of the inside file during scanning.
Host computer also will issue audio file to SD card by this mining voice-over-net controller, namely host computer is by audio file subpackage, go out to give this controller by data frame by frame, the filename that controller will be able to transmit according to host computer sets up relevant audio file in SD card.And become audio file according to the Data Integration received, be saved in SD card.Can listed files be rescaned afterwards, add the file newly increased to playlist.
The software simulating encoding and decoding speech of full duplex is passed through with the semiduplex audio coder & decoder (codec) of two-way; Audio drive circuitry driving force is strong, and universal performance is good, can connect any simulation audio amplifier that market is general; By real-time performance to the control of voice, transmission, easy to use; SD card, together with audio decoder circuit design, only can realize exchanges data with CPU control command, clock and chip selection signal, greatly save the resource of CPU; Circuit has 4 road power outlets can realize the power supply of the cascade of next stage equipment, avoid the difficulty of external power supply wiring, the mode that employing dual power supply line, double earth wire access jointly simultaneously reduces circuit merit consumption; With the electric switch of two light three, the interconnected of network can be realized; Voicefrequency circuit fidelity performance is good, is a product that in current mining audio frequency apparatus, acoustics is best, and adopts unique design, makes tone frequency channel wire, MIC line do not have polarity, prevent the reversal connection of construction midline road from bringing unnecessary trouble; And audio frequency is divided into 4 tunnels, different directions can be accessed respectively.
This is mining voice-over-net controller also supports to important parameter power down protection.IP, MAC of IP, MAC and server of comprising equipment also have initialized IP, MAC of Default Value in order to carrying out factory reset when breaking down, and then just can redistribute relevant IP, MAC etc. and make it normally use.Return when replying " heartbeat " of host computer and wrapping and oneself IP information is returned host computer.This is mining voice-over-net controller can IP, the MAC Address of online modification itself, can also revise the IP of the server of preservation, MAC Address.The IP broadcast search signal that host computer is sent out can be accepted simultaneously, return the information such as self IP, MAC.The convenient IP information finding controller when network confusion.But also can on-line control volume, and the volume after regulating be preserved.So that volume changes after power-down rebooting.
Voice-over-net controller can detect whether there is special operational request therebetween, if do not have particular request at decoded audio file during decoding.Voice-over-net controller can according to the audio file played in order in playlist, if list finishes playing, after from the beginning play again, so move in circles, until receive special operational request.These special operationals comprise the audio-frequency information such as radio talk, broadcast safe knowledge lecture of host computer to voice-over-net controller, this Time Controller can suspend the broadcasting of audio file, until the audio file transmissions of host computer is complete, continuous wait sees if there is continuous audio frequency a few second, if no, then can continue to play the audio file before transmission.Further, when MIC request signal triggers, controller also can suspend the audio file play, and is transformed into coding mode, to the coding audio signal transmitted by audio amplifier, is encoded into PCM code, is sent to host computer.After waiting for that the signal of MIC audio frequency stops, waiting for a few seconds, if also do not have new signal to trigger, this can be switched to play mode, the audio frequency before continuing to play.Further, when host computer issues preservation audio file, also same operation can be performed.First suspend the audio file play, the file then will preserved according to instruction is saved in corresponding position.Continue again after the end of file to be saved again etc. to play the original audio file suspended.
Said audio file comprises MP3 format above, MIDI audio format, the audio file that WAV form and WMA form etc. are conventional, because hardware space is limited, so be mainly defined as MP3 format in requiring.In controller, the operation of audio file is mainly carried out under the basis of FAT file system.Comprise the operation such as broadcasting, preservation of the searching of file, file ordering, file.For coding, employing be IMA ADPCM monophony coded format.Be line input mode.Voice-over-net controller there are two codecs, take on the work of Code And Decode respectively, because the own synchronization of chip used can only work in one mode, namely same chip Code And Decode can not work simultaneously, so be designed to two chips herein, and under the operating system scheduling of program design and ucosii, Code And Decode is worked simultaneously, the full duplex function of voice call can be accomplished.And the voice signal that under ore deposit, multiple audio amplifier transmits can be merged into a road sound signal and upload to host computer by a controller, the Bidirectional intelligent communication of point-to-points and multipair point namely can be realized.And what adopt when receiving the signal that audio amplifier transmits is simulating signal trigger circuit, namely with self trigger controller of the sound signal uploaded, makes it produce interruption, therefore can realize quick response.Be provided with response threshold, the errored response that the noise signal preventing circuit from transmitting causes simultaneously, arrive safety, object that is stable, that respond fast.
Compared with prior art, the invention has the beneficial effects as follows, the mining broadcaster applying this mining network controller is the broadcaster of new generation aiming at the current cutting-edge computer of fusion of colliery exploitation, multimedia, communication, real time operating system, embedded, singlechip technology, has traditional rated power broadcast and does not possess, incomparable feature:
1. multiplex broadcasting function: device can realize multichannel voice frequency and transmit simultaneously, can support 8 physical links.
2. source of sound abundant species: source of sound abundant species, can use traditional sound-box devices such as microphone, microphone, DVD/VCD, also can the modern digital equipment such as computer, MP3.When use computer play time, can play computer support whole digital voice files, in addition can network enabled play, ore deposit leader can in this office by computer to down-hole radio talk.
3. can sectoring function: independent control can be accomplished, as play notice to Office Area separately by region or logic groups broadcast, subregion broadcast (as Office Area, down-hole waiting room, dining room) by automatic or manual; Also the broadcast of full ore deposit can be carried out.
4. remote control function: broadcaster main frame start-stop can be carried out by computing machine and control, friendly interface, easy to operate, really achieve and be addressed to point control.
5. routine safety publicity, education: play mine safety rules and regulations, safety practice, corporate culture and other points for attention etc., strengthen the awareness of safety of worker.
6. in conjunction with emergency preplan, carry out automatic or manual emergency management and rescue: when device detects safety monitoring device alarm, when serious accident appears in down-hole, can according to prior setting program, transfer relevant emergency preplan, commander field staff withdraws; Also can manually call emergency preplan voice, play to appointed area; Can also pass through microphone, the direct commander relevant personnel withdraw.(this function needs additional customized, and device is spare interface.）
7. On-off signal: hardware is supported 4 way switch amount information inputs, coordinates mining industry other equipment on-the-spot, carries out phonic warning prompting, avoid the generation of accident.Audio amplifier near startup alarm points or whole audio amplifier can be set as required.
8. transmission range is long: full optical cable mode can be adopted to transmit, and shock resistance, noiseless, high-fidelity, transmission range can reach 60 kilometers, are particularly suitable for underground coal mine rugged surroundings.
9. automatic playing function: management host computer is simultaneously double does digital program source, can be realized manually by device host computer management software, self-timing play, colliery can by conventional to safety education, safety rule etc. voice document, be stored on hard disk, realize full-automatic non-linear broadcast, without the need to manual intervention, can automatically play, achieve real unmanned, different broadcasting schemes can be made according to the cycle, realize real-time circulation and play.
10. the voice of high-quality: the speech chip design of specialty, unique machinery, technological design, accomplish that sound is loud and clear, undistorted, changes over the root problem of underground coal mine hands free telephone lower tone.
11. music tone ringers, background music function: song, music and safety education slogan, poster, melodious music replaces the ear-piercing electric bell sound up to 90 decibels; Background music automatic or manual is played to appointed area, and miner is no longer born noise interference.
12. legacy equipment intelligent managements: intelligent and safe Broadcasting Control main frame is connected with computer, accepts conputer controlled order, arrange the automatic switch of lower control multiple devices in software unified management, timing automatic is play.Colliery can add intelligent and safe Broadcasting Control main frame (or later adding, smooth upgrade) as required, realizes the intelligent management of computing machine to sources of sound such as VCD, CD, DVD.
13. good openings and extensibility: have good opening and extensibility, can form wire, tree network, signal outlet is set up in parallel port, adds audio amplifier arbitrarily according to concrete demand.
14. higher Stability and dependabilities: adopt RF weak signal transmission mode, greatly improve the reliability of device, inactivity signal in device transmission network, the fault of single audio amplifier does not affect device work, complete machine is in closed condition automatically when not having signal, after having enabling signal or receiving start-up command, audio amplifier starts automatically, without the need to the control of personnel.
15. two-way intercommunication functions: down-hole intercommunication earthward can be realized.
16. digital video interlocks: can combine with digital video apparatus, reach data, voice, video interlink.
17. output audios are the simulated audio signal of standard, can take over the general stereo set of meaning.
The mining voice-over-net controller that the present invention relates to is a part for underground coal mine digital broadcasting, and digital broadcasting adopts Internet Transmission, and signal to noise ratio (S/N ratio) is high, long transmission distance, has the advantage that traditional rated power broadcast is incomparable.
The present invention heightened borehole operation security, information can be passed in time, ensure the personal safety of underground operators when accident and the circulation of information thereof to greatest extent, and important information can notify everyone timely and effectively at ordinary times.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the module diagram in controller case;
Fig. 3 is the circuit diagram of network processing circuitry;
Fig. 4 is the circuit diagram of SD card circuit;
Fig. 5 is the circuit diagram of power circuit;
Fig. 6 is the circuit diagram of coding-decoding circuit;
Fig. 7 is the circuit diagram of cpu circuit;
Fig. 8 is cascade device connection diagram.
Wherein, 1.CPU circuit, 2. network processing circuitry, 3.SD card circuit, 4. coding-decoding circuit I, 5. coding-decoding circuit II, 6. audio drive circuitry, 7. power circuit, 8. audio interface, 9. cascade device power interface, 10 photoelectricity switches, 11. optical fiber, 12. power transfer module, 13. fiber reels, 14. 1 road 24V input, 15. 1 road 24V export, 16.2 road 24V input, 17. 2 road 24V export, 18.3.3V input, 19.3.3V export, 20. Mine-used I. S voice-over-net controllers, D1. mining explosion-proof type 24V direct supply, Z1. voice-over-net controller main frame 1, Z2. voice-over-net controller main frame 2, Z3. voice-over-net controller main frame 3, Z4. voice-over-net controller main frame 4.
Embodiment
Below by instantiation, the present invention will be further elaborated, should be noted that following explanation is only to explain the present invention, not limiting its content.
See the structural representation of Fig. 1 and the control box inner module schematic diagram of Fig. 2, a kind of Mine-used I. S voice-over-net controller, by power circuit 7, network processing circuitry 2, SD card circuit 3, cpu circuit 1, coding-decoding circuit I 4, coding-decoding circuit II 5, audio drive circuitry 6,4 tunnel audio interface 8, composition such as cascade device power interface 9 grade.Fig. 3 is the circuit diagram of network processing circuitry; Fig. 4 is the circuit diagram of SD card circuit; Fig. 5 is the circuit diagram of power circuit; Fig. 6 is the circuit diagram of coding-decoding circuit; Fig. 7 is the circuit diagram of cpu circuit.
Cpu circuit 1 is connected with network processing circuitry 2, SD card circuit 3,2 audio coding decoding circuit and the power circuit 7 for powering respectively, and audio coding decoding circuit is connected with driving circuit, and driving circuit is connected with 4 tunnel audio interface 8.
Described SD card circuit 3 is also connected II 5 with audio coding decoding circuit.SD card circuit 3 is connected the audio file stream that can realize SD card exports and directly enters coding-decoding circuit without CPU with coding-decoding circuit II 5, the consumption to CPU internal memory can be reduced like this, make CPU can process more thing simultaneously, also ensure that the continuity of music, encoding and decoding time and real music reproduction time mate more simultaneously.Avoid, due to the phenomenon that the music produced CPU to consume a large amount of internal memory during processing its task or accident " gets stuck ".
Described audio drive circuitry 6 is also connected with cpu circuit 1.Audio drive circuitry 6 is connected with cpu circuit 1, and an effect is by CPU initialization audio drive circuitry 6.Another effect is the controllability strengthening audio drive circuitry 6.Contain the audio signal circuit that will play giving audio amplifier and the MIC voice signal circuit transmitted by audio amplifier in audio drive circuitry 6, to be connected functions such as can realizing issuing audio frequency and upload freely the switching of audio frequency, switch, passback with cpu circuit 1.
Described power circuit 7 is also connected with cascade device power interface 9.
Cascade device as shown in Figure 8, (example shown in Fig. 8 just illustrates that main frame is connected with main frame, the connection of sound equipment and main frame is original with this) D1: mining explosion-proof type 24V direct supply, Z1: voice-over-net controller main frame 1, Z2: voice-over-net controller main frame 2, Z3: voice-over-net controller main frame 3, Z4: voice-over-net controller main frame 4.
Mine power resource D1 is connected with the power interface of main frame Z1, the power input interface of Z2 is connected with the power output interface of Z1, in other words Z2 can power taking on Z1, doing so avoids D1 with Z2 and be connected (in figure dotted line), same Z3, Z4 can pass through previous stage power taking, as solid line in figure connect.And can not directly as dotted line in figure be connected with power supply.
The electricity got by upper level has the protection circuit preventing reversal connection in main frame, avoids occurring that reversal connection causes system to go wrong in construction.
Because mine lower room is narrow and small, power cable is all thicker, and distance between main frame is general far away, if it is cause wiring very difficult that All hosts is all connected with D1 one, the total length of another cable is also being doubled at double, thing followed price is also being doubled at double, is namely unfavorable for site operation, is also unfavorable for enterprise profit.If adopt the mode of terminal box, before Z1, add a terminal box line is separated, one route access another road of Z1 allowed Z1 receive Z2, such one side is unfavorable for field wiring, on the one hand add product and construction cost, another All hosts all with the power sources in parallel of D1, if there is a host line to go wrong, All hosts will be caused not work, and when main frame is many, be also difficult to the problem gone out determining which main frame.Unlike the cascade system in the design, as long as the power supply of the main frame having the input power of a main frame to disconnect below all disconnects, field higher to safety requirements below colliery is like this found problem fast and takes effective construction in time, will bring immeasurable advantage to the safety in miner and whole colliery.
Power circuit 7 is that interlock circuit (circuit comprising the part such as cpu circuit 1, network processing circuitry 2, audio coding decoding and power for cascade device) provides stabilized voltage supply, audio data in network processing circuitry 2 or SD card circuit 3, by controlling audio coding decoding and audio drive circuitry 6, is issued and is broadcast out by audio amplifier by cpu circuit 1.
Voice-over-net controller CPU circuit 1 according to the audio file played in order of playlist in SD card, first can be decoded by coding-decoding circuit, and signal arrives mining broadcast audio amplifier through audio drive circuitry 6 again and plays.If list finishes playing, after from the beginning play again, so move in circles, until receive special operational request.Such as host computer is to the radio talk of voice-over-net controller, this Time Controller can suspend the broadcasting of audio file, until the audio file transmissions of host computer is complete, continuous wait sees if there is continuous audio frequency a few second, if no, then can continue to play the audio file before transmission.Further, when MIC signal is triggered by the request of one of 4 tunnel audio interface 8, controller also can suspend the audio file play, be transformed into coding mode, the sound signal that audio amplifier transmits arrives codec through audio drive circuitry 6, is encoded into adpcm code, is sent to host computer.After waiting for that the signal of MIC audio frequency stops, waiting for a few seconds, if also do not have new signal to trigger, this can be switched to play mode, the audio frequency before continuing to play in SD card.
For coding, employing be IMA ADPCM monophony coded format, be line input mode.This is mining voice-over-net controller there are two codecs, take on the work of Code And Decode respectively, because the own synchronization of chip used can only work in one mode, namely same chip Code And Decode can not work simultaneously, so be designed to two chips herein, and under the operating system scheduling of program design and ucosii, Code And Decode is worked simultaneously, the full duplex function of voice call can be accomplished.
The voice coding of this design and decoding processing of circuit independently, the load of whole system is reduced greatly, and the speed of encoding and decoding is significantly improved, particularly effectively can overcome in practical application the negative effect that in actual environment, strong magnetic interference and chip self-heating bring encoding-decoding efficiency, the effect that conventional circuit design is incomparable can be brought.
The design of the power circuit of this equipment all meets intrinsic safety requirement.Do not allow large electric capacity and inductance to occur in the environment of the many gas in colliery, and traditional voicefrequency circuit often can adopt large capacitor filtering to reach the effect reducing power supply ripple, in being designed in order to can meet this case requirement can reach again good quality audio object, the DCDC chip that the switching frequency that uses specially of power supply is high herein, so just below just can with smaller lc circuit, it is just short that switching frequency bulky capacitor fully puts the time, the time of inductance accumulation of energy is also with regard to shorter, so just do not need large accumulation of energy original paper just can meet the requirement of power supply., after the shape filtering of the row of employing, and in late-class circuit, adopt mimic channel digital circuit separately to wait various ways to realize reducing the object that ripple improves tonequality.Show that the circuit design ripple of this equipment is very little through professional power supply and audio-frequency test, music effect is very good, and under well solving colliery, explosive region can not be placed on the problem of hi-fidelity audio equipment.
Claims (9)
1. a Mine-used I. S voice-over-net controller, it is characterized in that, it comprises cpu circuit, cpu circuit respectively with network processing circuitry, SD card circuit, two-way audio coding-decoding circuit, audio drive circuitry and for providing the power circuit of stabilized voltage supply to be connected, two-way audio coding-decoding circuit is connected with at least one road audio interface through described audio drive circuitry, and described SD card circuit is directly connected with audio coding decoding circuit;
Described audio coding decoding circuit carries out Code And Decode to SD card sound intermediate frequency file, resolves simultaneously, isolate command word and data to the order that host computer passed, and is carried out decoding and playing by the voice data transmitted, after the signal that the sound equipment MIC be connected with audio interface triggers being detected, stop the audio file playing, and be switched to playback function by the voice reproducing in MIC to other sound equipments, and this audio coding is become adpcm code, send out uploading instructions to host computer and the audio file packing after coding is uploaded to host computer, under normal circumstances at set intervals after host computer whether send " heartbeat " bag Sampling network voice controller online, owing to there being multiple controller in system, be mounted on network with the form of different IP simultaneously, so, each heartbeat packet can recover IP address own, MAC information, process for audio file comprises the scanning to audio file on SD card, apply for that audio file play list is deposited in space according to the number of the inside file during scanning.
2. Mine-used I. S voice-over-net controller according to claim 1, it is characterized in that, the audio file that described network processing circuitry reception host computer issues goes out to give cpu circuit, the filename that cpu circuit will transmit according to host computer sets up relevant audio file in SD card, and become audio file according to the Data Integration received, be saved in SD card, can listed files be rescaned afterwards, added the file newly increased to playlist.
3. Mine-used I. S voice-over-net controller according to claim 1, is characterized in that, described audio drive circuitry contains the audio signal circuit that will play giving audio amplifier and the MIC voice signal circuit transmitted by audio amplifier.
4. Mine-used I. S voice-over-net controller according to claim 1, it is characterized in that, described cpu circuit mainboard adopts STM32F103 to be hardware foundation, its built-in system software adopts embedded OS usocII, and has transplanted FatFs file system and TCP/UDP IP stack in a program.
5. Mine-used I. S voice-over-net controller according to claim 1, is characterized in that, described cpu circuit can detect whether there is special operational request, if do not have particular request during decoded audio file during decoding; Voice-over-net controller can according to the audio file played in order in playlist, if list finishes playing, after from the beginning play again, so move in circles, until receive special operational request; These special operationals comprise host computer to the radio talk of voice-over-net controller, broadcast safe knowledge lecture audio-frequency information, this Time Controller can suspend the broadcasting of audio file, until the audio file transmissions of host computer is complete, continuous wait sees if there is continuous audio frequency a few second, if no, then can continue to play the audio file before transmission; When MIC request signal triggers, controller also can suspend the audio file play, be transformed into coding mode, to the coding audio signal transmitted by audio amplifier, be encoded into PCM code, be sent to host computer, after waiting for that the signal of MIC audio frequency stops, waiting for a few seconds, if also do not have new signal to trigger, this can be switched to play mode, the audio frequency before continuing to play; When host computer issues preservation audio file, also same operation can be performed; First suspend the audio file play, the file then will preserved according to instruction is saved in corresponding position, then etc. continue again after the end of file to be saved to play the original audio file suspended.
6. Mine-used I. S voice-over-net controller according to claim 1, it is characterized in that, described cpu circuit also supports the power down protection to important parameter, IP, MAC of IP, MAC and server that these important parameters comprise equipment also have initialized IP, MAC of Default Value in order to carrying out factory reset when breaking down, and then redistribute relevant IP, MAC and make it normally use; Oneself IP information can be returned host computer when " heartbeat " of replying host computer wraps; This is mining voice-over-net controller can IP, the MAC Address of online modification itself, can also revise the IP of the server of preservation, MAC Address; The IP broadcast search signal that host computer is sent out can be accepted simultaneously, return self IP, MAC information; But also can on-line control volume, and the volume after regulating be preserved.
7. Mine-used I. S voice-over-net controller according to claim 1, it is characterized in that, described power circuit is also connected with cascade device power interface.
8. Mine-used I. S voice-over-net controller according to claim 1, is characterized in that, described SD card circuit is directly connected by SPI interface with audio coding decoding circuit.
9. Mine-used I. S voice-over-net controller according to claim 1, is characterized in that, described two-way audio coding-decoding circuit adopts two-way half-duplex voice codec.
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| CN103037044B (en) * | 2012-12-12 | 2016-03-09 | 天地（常州）自动化股份有限公司 | Colliery multimedia amplifies communication terminal |
| CN111540369B (en) * | 2020-06-01 | 2023-04-07 | 杭州电子科技大学 | Acquisition and transmission system for apnea snore |
| CN113364549A (en) * | 2021-07-07 | 2021-09-07 | 邯郸市金世达科技有限公司 | Method for realizing on-site voice prompt and network broadcast based on network camera |
| CN113825106B (en) * | 2021-11-24 | 2022-04-01 | 天津七一二移动通信有限公司 | Digital transmission system of voice broadcast signals along coal mine and implementation method |
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| CN202443741U (en) * | 2012-03-06 | 2012-09-19 | 济南蓝动激光技术有限公司 | Intrinsically safe network voice controller for mine |
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