CN103297092A - System for transmitting broadcast signals through power line - Google Patents
System for transmitting broadcast signals through power line Download PDFInfo
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- CN103297092A CN103297092A CN2013102296852A CN201310229685A CN103297092A CN 103297092 A CN103297092 A CN 103297092A CN 2013102296852 A CN2013102296852 A CN 2013102296852A CN 201310229685 A CN201310229685 A CN 201310229685A CN 103297092 A CN103297092 A CN 103297092A
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- power line
- broadcast singal
- carrier signal
- circuit
- coupling transformer
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Abstract
The invention discloses a system for transmitting broadcast signals through a power line. The system comprises a power line modulator and demodulator, a coupling transformer and a control device, wherein the control device is connected with the power line modulator and demodulator, and the power line modulator and demodulator is connected with the power line through the coupling transformer. The power line is adopted to transmit the broadcast signals so that the system is good in generality, convenient to use and simple to install and maintain, can be modified simply by aid of the existing platform, saves money and energy, can cover the broadcast signals at power-on places, and has a good market promotion application prospect.
Description
Technical field
The present invention relates to the broadcast singal transmission field, in particular a kind of system by the power line transmission broadcast singal.
Background technology
All broadcast systems all are to adopt special line at present, or wireless signal transmits broadcast singal.Wherein, adopt special line to transmit and have problems such as investment is big, line upkeep is difficult, strongly professional.
Wireless to transmit its principle as follows and adopt: the broadcasting station broadcast items is at first sound to be converted to audio electrical signal by microphone, after amplifying, modulated by high-frequency signal (carrier wave), at this moment a certain parameter of high-frequency carrier signal is along with audio signal is done corresponding the variation, the audio signal that we will be transmitted is included within the high-frequency carrier signal, high-frequency signal is again through amplifying, when high-frequency current flows through antenna then, form radio wave and outwards launch, velocity of radio wave is 3 * 10
8M/s, this radio wave is received by radio antenna, through amplification, demodulation, is reduced to audio electrical signal then, sends in the loudspeaker voice coil loudspeaker voice coil, causes that cone vibrates accordingly, just can go back original sound, namely is that the acoustic-electric conversion transmits---the process of electroacoustic conversion.Though adopt wireless transmission method to greatly reduce transmission cost, signal source can not get guaranteeing, and is interfered easily in transmission course.
In view of this, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is installation difficulty height that prior art broadcast singal transmission exists, strongly professional and interference is bigger, at the above-mentioned defective of prior art, provides a kind of system by the power line transmission broadcast singal.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A kind of system by the power line transmission broadcast singal, wherein, described system comprises:
Power line modem is used for broadcast singal waiting for transmission is modulated into carrier signal, and demodulates broadcast singal from the carrier signal that receives;
Coupling transformer is used for the carrier signal after described power line modem modulation is coupled to power line;
Control device is used for the described power line modem of control;
Wherein, described control device connects described power line modem, and described power line modem connects described power line by described coupling transformer.
Described system by the power line transmission broadcast singal, wherein, described system also comprises:
The power output amplifying circuit is used for the carrier signal after the described power line modem modulation is carried out power amplification, and the carrier signal after the power amplification is transferred to described coupling transformer.
Described system by the power line transmission broadcast singal, wherein, comprise at power line interface: input filter circuit, power amplification circuit, voltage amplifier circuit and isolator, described input filter circuit carries out filtering to the carrier signal that coupling transformer is coupled into, voltage amplifier circuit carries out preposition amplification to filtering signal, sends into power line modem then and carries out demodulation; Power amplification circuit carries out power amplification to the carrier signal that modulates, and is coupled on the power line by coupling transformer then, by isolator transtation mission circuit is separated with receiving circuit, thereby reduces power amplification circuit to the influence of input circuit.
Described system by the power line transmission broadcast singal, wherein, described control device comprises single-chip microcomputer, and the compress speech and decompression module and the compressed package memory module that link to each other with described single-chip microcomputer.
Described system by the power line transmission broadcast singal, wherein, the number of described single-chip microcomputer is two.
System by the power line transmission broadcast singal provided by the present invention, owing to adopted power line to carry out the broadcast singal transmission, its versatility is good, and is easy to use, installation and maintenance are simple, have good marketing application prospect.
Description of drawings
Fig. 1 is the structured flowchart that passes through the system of power line transmission broadcast singal of the present invention.
Fig. 2 is the schematic diagram that the control device that passes through the system of power line transmission broadcast singal of the present invention is controlled power line modem.
Fig. 3 is the circuit block diagram by power line interface in the system of power line transmission broadcast singal of the present invention.
Embodiment
The invention provides a kind of system by the power line transmission broadcast singal, clearer, clear and definite for making purpose of the present invention, technical scheme and advantage, below develop simultaneously with reference to accompanying drawing that the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
See also Fig. 1, it is the system by the power line transmission broadcast singal of the present invention, and wherein, described system comprises: power line modem 100, coupling transformer 200 and control device 300; Wherein, described control device 300 connects described power line modem 100, and described power line modem 100 connects described power line 10 by described coupling transformer 200.
Specifically, described power line modem 100 is used for broadcast singal waiting for transmission is modulated into carrier signal, and demodulates broadcast singal from the carrier signal that receives.In simple terms, described power line modem 100 is a kind of computer hardwares, it can translate into the pulse signal that can transmit along power line to the digital signal of computer, and these pulse signals can be received by another modulator-demodulator of the circuit other end, and is translated into the language that computer can be understood.This simple procedure has been finished the communication of two intercomputers.The operation principle of described power line modem 100 can just seldom be done and give unnecessary details here referring to telephone line modem.
Described coupling transformer 200 is used for the carrier signal after described power line modem modulation is coupled to power line; So-called coupling refers between two or more systems or the two kinds of forms of motion by various interactions influence each other down to the phenomenon of joining together in physics, and for example the mutual inductance between two coils is the coupling by magnetic field.Be commonly used for the transformer of interpolar coupling in the radio link, the middle week of Source Music, input transformer, output transformer all belong to this class, are called coupling transformer.The effect of coupling transformer is many-sided, and it can also be used to reaching impedance matching etc.Described control device 300 is used for the described power line modem of control; In the present embodiment, described control device comprises single-chip microcomputer, and the compress speech and decompression module and the compressed package memory module that link to each other with described single-chip microcomputer.
See also Fig. 2, it is the schematic diagram that the control device that passes through the system of power line transmission broadcast singal of the present invention is controlled power line modem, as shown in Figure 2, wherein, control device comprises single-chip microcomputer 1 and single-chip microcomputer 2, its control power line modem carries out speech data reception and transmission, speech data compression and decompression, compressed package storage etc., carrier signal after the described power line modem modulation is coupled on the power line interface (to be described for convenient, has omitted coupling transformer among the figure).
Further, of the present invention by also being buckled with the power output amplifying circuit in the system of power line transmission broadcast singal cruelly, be used for the carrier signal after the described power line modem modulation is carried out power amplification, and the carrier signal after the power amplification is transferred to described coupling transformer.
As shown in the figure, comprise at described power line interface: input filter circuit, power amplification circuit, voltage amplifier circuit and isolator, described input filter circuit carries out filtering to the carrier signal that coupling transformer is coupled into, voltage amplifier circuit carries out preposition amplification to filtering signal, sends into power line modem then and carries out demodulation; Power amplification circuit carries out power amplification to the carrier signal that modulates, and is coupled on the power line by coupling transformer then, by isolator transtation mission circuit is separated with receiving circuit, thereby reduces power amplification circuit to the influence of input circuit.Its course of work as shown in Figure 3.
In sum, a kind of system by the power line transmission broadcast singal of the present invention, wherein, described system comprises: power line modem, coupling transformer and control device; Wherein, described control device connects described power line modem, and described power line modem connects described power line by described coupling transformer.Because adopted power line to carry out the broadcast singal transmission, its versatility is good, and is easy to use, installation and maintenance are simple, utilize existing platform to transform, and are economical, laborsaving; As long as the place of energising just can cover broadcast singal, has good marketing application prospect.
Should be understood that application of the present invention is not limited to above-mentioned giving an example, for those of ordinary skills, can be improved according to the above description or conversion that all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (5)
1. system by the power line transmission broadcast singal is characterized in that described system comprises:
Power line modem is used for broadcast singal waiting for transmission is modulated into carrier signal, and demodulates broadcast singal from the carrier signal that receives;
Coupling transformer is used for the carrier signal after described power line modem modulation is coupled to power line;
Control device is used for the described power line modem of control;
Wherein, described control device connects described power line modem, and described power line modem connects described power line by described coupling transformer.
2. the system by the power line transmission broadcast singal according to claim 1 is characterized in that described system also comprises:
The power output amplifying circuit is used for the carrier signal after the described power line modem modulation is carried out power amplification, and the carrier signal after the power amplification is transferred to described coupling transformer.
3. the system by the power line transmission broadcast singal according to claim 1, it is characterized in that, comprise at power line interface: input filter circuit, power amplification circuit, voltage amplifier circuit and isolator, described input filter circuit carries out filtering to the carrier signal that coupling transformer is coupled into, voltage amplifier circuit carries out preposition amplification to filtering signal, sends into power line modem then and carries out demodulation; Power amplification circuit carries out power amplification to the carrier signal that modulates, and is coupled on the power line by coupling transformer then, by isolator transtation mission circuit is separated with receiving circuit, thereby reduces power amplification circuit to the influence of input circuit.
4. the system by the power line transmission broadcast singal according to claim 1 is characterized in that described control device comprises single-chip microcomputer, and the compress speech and decompression module and the compressed package memory module that link to each other with described single-chip microcomputer.
5. the system by the power line transmission broadcast singal according to claim 1 is characterized in that the number of described single-chip microcomputer is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102296852A CN103297092A (en) | 2013-06-09 | 2013-06-09 | System for transmitting broadcast signals through power line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102296852A CN103297092A (en) | 2013-06-09 | 2013-06-09 | System for transmitting broadcast signals through power line |
Publications (1)
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| CN103297092A true CN103297092A (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013102296852A Pending CN103297092A (en) | 2013-06-09 | 2013-06-09 | System for transmitting broadcast signals through power line |
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Citations (11)
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| CN1297289A (en) * | 2000-12-22 | 2001-05-30 | 清华大学 | Spread spectrum communication transceiver using three-phase power transmission lines of low-voltage distribution network |
| US6407987B1 (en) * | 1989-04-28 | 2002-06-18 | Wire21, Inc. | Transformer coupler for communication over various lines |
| CN2624530Y (en) * | 2003-05-29 | 2004-07-07 | 卞思海 | Power line broadcast |
| CN1606833A (en) * | 2001-12-20 | 2005-04-13 | 安捷伦科技有限公司 | Coupling circuit arrangement for data communication over power lines |
| CN1623318A (en) * | 2002-02-01 | 2005-06-01 | 赛特斯公司 | High frequency network multiplexed communications over various lines using multiple modulated carrier frequencies |
| CN1874174A (en) * | 2006-06-21 | 2006-12-06 | 张会庭 | Multimedia information network on power line in village level |
| CN101136723A (en) * | 2006-08-31 | 2008-03-05 | 上海协同科技股份有限公司 | Self-adaptive electric power carrier wave concentrator |
| CN201797502U (en) * | 2010-07-17 | 2011-04-13 | 刘利华 | Intelligent touch switch for power line carrier network |
| CN102447494A (en) * | 2011-12-31 | 2012-05-09 | 上海贝岭股份有限公司 | Broadband coupling circuit for multicarrier communication |
| CN102684745A (en) * | 2012-05-21 | 2012-09-19 | 成都立鑫新技术科技有限公司 | Method and device for securing and blocking power line information |
| CN103078664A (en) * | 2012-12-17 | 2013-05-01 | 刘乃安 | Wi-Fi (wireless fidelity) communication system based on power line carrier communication |
-
2013
- 2013-06-09 CN CN2013102296852A patent/CN103297092A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6407987B1 (en) * | 1989-04-28 | 2002-06-18 | Wire21, Inc. | Transformer coupler for communication over various lines |
| CN1297289A (en) * | 2000-12-22 | 2001-05-30 | 清华大学 | Spread spectrum communication transceiver using three-phase power transmission lines of low-voltage distribution network |
| CN1606833A (en) * | 2001-12-20 | 2005-04-13 | 安捷伦科技有限公司 | Coupling circuit arrangement for data communication over power lines |
| CN1623318A (en) * | 2002-02-01 | 2005-06-01 | 赛特斯公司 | High frequency network multiplexed communications over various lines using multiple modulated carrier frequencies |
| CN2624530Y (en) * | 2003-05-29 | 2004-07-07 | 卞思海 | Power line broadcast |
| CN1874174A (en) * | 2006-06-21 | 2006-12-06 | 张会庭 | Multimedia information network on power line in village level |
| CN101136723A (en) * | 2006-08-31 | 2008-03-05 | 上海协同科技股份有限公司 | Self-adaptive electric power carrier wave concentrator |
| CN201797502U (en) * | 2010-07-17 | 2011-04-13 | 刘利华 | Intelligent touch switch for power line carrier network |
| CN102447494A (en) * | 2011-12-31 | 2012-05-09 | 上海贝岭股份有限公司 | Broadband coupling circuit for multicarrier communication |
| CN102684745A (en) * | 2012-05-21 | 2012-09-19 | 成都立鑫新技术科技有限公司 | Method and device for securing and blocking power line information |
| CN103078664A (en) * | 2012-12-17 | 2013-05-01 | 刘乃安 | Wi-Fi (wireless fidelity) communication system based on power line carrier communication |
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Application publication date: 20130911 |