CN202524558U - Mining flame-proof and intrinsic safe type sound box - Google Patents
Mining flame-proof and intrinsic safe type sound box Download PDFInfo
- Publication number
- CN202524558U CN202524558U CN2011205565611U CN201120556561U CN202524558U CN 202524558 U CN202524558 U CN 202524558U CN 2011205565611 U CN2011205565611 U CN 2011205565611U CN 201120556561 U CN201120556561 U CN 201120556561U CN 202524558 U CN202524558 U CN 202524558U
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- audio frequency
- chip
- signal
- power supply
- frequency optical
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Abstract
The present utility model discloses a mining flame-proof and intrinsic safe type sound box which relates to a coal mine broadcast and public address communication system. The sound box is provided with an audio frequency light receiver for receiving light signals of an audio frequency light transmitter, a power amplifier connected with the audio frequency light receiver, a loudspeaker connected with the power amplifier, and a power supply module for supplying power to the above modules; a 127V AC power supply is adopted as a power supply and converted into 12V intrinsic safe type direct current through the power supply module, and a whole circuit is arranged inside a closed shell body. The sound box is good in acoustic fidelity and strong in anti-interference capacity, the output distance and the acoustic fidelity are enhanced, and the sound box can be directed merged into an industrial Ethernet ring network system.
Description
Technical field
The utility model relates to colliery broadcasting and amplifies communication system; It specifically is a kind of mine explosion-suppression and intrinsic safety type audio amplifier; Make things convenient for the transmission of mine industrial optical fiber; Be not only applicable to contain under the coal mine gas and the more dangerous inflammable and explosive environment of coal dust, be suitable for using in the industry ground adverse circumstances such as coal, metallurgy, chemical industry, building materials, traffic, electric power, grain yet.
Background technology
At present, China's downhole coal mine broadcasting is of a great variety with the communication system that amplifies, and colliery broadcasting is exactly audio amplifier with the terminal equipment of the communication system that amplifies, and the quality of speaker quality has determined the quality of broadcasting with the communication system that amplifies to a great extent.Traditional audio amplifier adopts cable transmission, and poor anti jamming capability, tonequality are also bad.This audio amplifier adopts Optical Fiber Transmission, has improved output distance and tonequality, can also directly insert ethernet ring network.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art; The utility model provides a kind of mine explosion-suppression and intrinsic safety type audio amplifier; Be the terminal of the colliery broadcasting and the communication system that amplifies, realize the function of aboveground conversation to the down-hole, playing back music, paging, audio amplifier is an essential safe type; Can bring in the emergent expansion broadcast system sophisticated systems function into; Tonequality is good, strong interference immunity, has improved output distance and tonequality, can directly include industrial Ethernet ring network system in.
The utility model is realized with following technical scheme: a kind of mine explosion-suppression and intrinsic safety type audio amplifier; Comprise the audio frequency optical receiver that is used to receive audio frequency optical sender light signal, the power amplifier that is connected with the audio frequency optical receiver; The loud speaker that is connected with power amplifier is to the power module of above-mentioned each module for power supply; Its power supply adopts the 127V ac power supply, converts 12V essential safe type direct current into through power module, and entire circuit is installed in the airtight housing.
The beneficial effect of the utility model is: the dispatching desk on ground can carry out background music through computer plays, broadcasts; Passing to audio amplifier to voice signal through the audio frequency optical transceiver plays back; Tonequality is good, strong interference immunity; Improve output distance and tonequality, can directly include industrial Ethernet ring network system in.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the utility model theory diagram;
Fig. 2 is the utility model U1 module circuit diagram;
Fig. 3 is the utility model U2 module circuit diagram;
Fig. 4 is the utility model U3 module circuit diagram;
Fig. 5 is the utility model U5 module circuit diagram.
Among the figure: U1, audio frequency optical sender, U2, audio frequency optical receiver, U3, power amplifier module, U4, loud speaker, U5, power module.
Embodiment
As shown in Figure 1, the mine explosion-suppression and intrinsic safety type audio amplifier has an audio frequency optical receiver U2, power amplifier U3, loud speaker U4 and power module U5.Outside associate device audio frequency optical sender U1 changes into light signal with voice signal and launches, and audio frequency optical receiver U2 receives the light signal that audio frequency optical sender U1 launches through optical fiber, converts light signal to voice signal then and issues power amplifier U3; Voice signal is handled the back through power amplifier U3 and is passed to loud speaker U4 to voice signal, and loud speaker U4 blazes abroad voice signal; Entire circuit is installed in the airtight housing.Use in order to satisfy in adverse circumstances such as mine, its power supply adopts the 127V ac power supply, converts 12V essential safe type direct current into through power module U5, and housing is metal or the nonmetal closed container of processing that meets flame proof under the coal mine.
Shown in Fig. 2～5, audio frequency optical sender U1, major function is to change into light signal to aboveground voice signal; Audio frequency optical receiver U2, major function is the light signal that receives audio frequency optical sender U1 emission, and is reduced into voice signal to light signal; Power amplifier module U3 is mainly used in and receives the voice signal that audio frequency optical receiver U2 transmits and amplify; Loud speaker U4 is used to play sound; Power module U5 is mainly used in to U2, the U3 power supply.
Audio frequency optical sender U1 adopts SFM (V) T chip, triode 2SC4326 and photoelectrical coupler; Output also links to each other with triode 2SC4326 as radiofrequency signal for 3 pin received speech signals of SFM (V) T chip, 8 pin.SFM (V) T chip changes into radiofrequency signal with audio signal, and radiofrequency signal is amplified radiofrequency signal through triode 2SC4326 and passed to photoelectrical coupler, and photoelectrical coupler becomes electrical signal conversion light signal to spread out of through coupling.
Audio frequency optical receiver U2 adopts photodiode, PHOAMP chip and SFM (V) R chip, and 7,8 bipods of SFM (V) R chip receive the signal from U1, and 3 pin are as audio output.Photodiode receives the light signal of audio frequency optical sender U1 emission, changes into radiofrequency signal to light signal and issues SFM (V) the R chip of self through the PHOAMP chip, and SFM (V) R chip is processed into voice signal to radiofrequency signal.
Power amplifier U3 adopts TDA7377 chip, 4,5; 11,12; As receiving terminal, 1,2; 14,15 as output.
Loud speaker U4 has the compound horn of two independent power amplifiers, two groups of water proof type rubber basins, has characteristics such as Hz-KHz is wide, tonequality is pure, played in stereo are arranged.
Power module U 5 adopts two LM723 chips, has dual overvoltage, dual overcurrent protection function.
The course of work: SFM (V) the T chip among the audio frequency optical sender U1 changes into radiofrequency signal with audio signal; Radiofrequency signal is passed to photoelectrical coupler to the radiofrequency signal amplification through the 2SC4326 triode, and photoelectrical coupler becomes electrical signal conversion light signal to spread out of through coupling; Photodiode among the audio frequency optical receiver U2 receives light signal; Change into radiofrequency signal to light signal through the PHOAMP chip and issue the SFM of self (V) R chip; SFM (V) R chip is processed into voice signal to radiofrequency signal; Voice signal is after power amplifier module U3 amplifies and deliver to loud speaker U4, sounds.The dispatching desk on ground can carry out background music to the down-hole through main frame plays, broadcasts, and passes to audio amplifier to voice signal and plays back; Make things convenient for the transmission of mine industrial optical fiber.
Claims (3)
1. mine explosion-suppression and intrinsic safety type audio amplifier; It is characterized in that: comprise the audio frequency optical receiver (U2) that is used to receive audio frequency optical sender light signal, the power amplifier (U3) that is connected with audio frequency optical receiver (U2); The loud speaker (U4) that is connected with power amplifier (U3) is to the power module (U5) of above-mentioned each module for power supply; Its power supply adopts the 127V ac power supply, converts 12V essential safe type direct current into through power module (U5), and entire circuit is installed in the airtight housing.
2. mine explosion-suppression and intrinsic safety type audio amplifier according to claim 1 is characterized in that: described audio frequency optical sender adopts SFM (V) T chip, triode 2SC4326 and photoelectrical coupler; SFM (V) T chip changes into radiofrequency signal with audio signal, and radiofrequency signal is passed to photoelectrical coupler to the radiofrequency signal amplification through triode 2SC4326, and photoelectrical coupler becomes electrical signal conversion light signal to spread out of through coupling; Audio frequency optical receiver (U2) adopts photodiode, PHOAMP chip and SFM (V) R chip; Photodiode receives the light signal of audio frequency optical sender U1 emission; Change into radiofrequency signal to light signal and issue SFM (V) the R chip of self through the PHOAMP chip, SFM (V) R chip is processed into voice signal to radiofrequency signal; Described power amplifier (U3) adopts the TDA7377 chip.
3. mine explosion-suppression and intrinsic safety type audio amplifier according to claim 1 and 2 is characterized in that: said housing is metal or the nonmetal closed container of processing that meets flame proof under the coal mine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205565611U CN202524558U (en) | 2011-12-28 | 2011-12-28 | Mining flame-proof and intrinsic safe type sound box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205565611U CN202524558U (en) | 2011-12-28 | 2011-12-28 | Mining flame-proof and intrinsic safe type sound box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202524558U true CN202524558U (en) | 2012-11-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205565611U Expired - Fee Related CN202524558U (en) | 2011-12-28 | 2011-12-28 | Mining flame-proof and intrinsic safe type sound box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202524558U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795831A (en) * | 2014-01-24 | 2014-05-14 | 南通神华电气有限公司 | Totally-closed waterproof mine amplified phone |
-
2011
- 2011-12-28 CN CN2011205565611U patent/CN202524558U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795831A (en) * | 2014-01-24 | 2014-05-14 | 南通神华电气有限公司 | Totally-closed waterproof mine amplified phone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20151228 |
|
| EXPY | Termination of patent right or utility model |