CN202059409U - Zero line-data line coupling mode low pressure power line communication system - Google Patents
Zero line-data line coupling mode low pressure power line communication system Download PDFInfo
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- CN202059409U CN202059409U CN2011201075505U CN201120107550U CN202059409U CN 202059409 U CN202059409 U CN 202059409U CN 2011201075505 U CN2011201075505 U CN 2011201075505U CN 201120107550 U CN201120107550 U CN 201120107550U CN 202059409 U CN202059409 U CN 202059409U
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Abstract
The utility model relates to the low pressure power line communication field, more specifically to a low pressure power line communication system. The power line communication is the communication technology utilizing the multimedia business such as low pressure power line channel transmission data, voice, image, etc. At present, the power line communication generally employs electric energy transmission phase line-zero line to carry carrier wave signals; the carrier wave signals in the communication mode are likely to suffer severe attenuation and interference when transmitted on a power line, and the real transmission rate is far from the theoretical value. The low pressure power line communication system of the utility model utilizes the zero line of the low pressure power line and a special-purpose data line to form a return circuit; a zero line-data line mode is employed to carry the carrier wave signals. Interference from the power line is minimized, and thereby data transmission reliability and transmission rate are raised. The low pressure power line communication system comprises a low pressure power line communication device A for connecting with a user terminal, receiving data from the user terminal, changing the data to high frequency carrier wave signals and coupling the high frequency carrier wave signals to a coupling line; the coupling line utilizes the return circuit formed by the zero line and the special-purpose data line to transmit the high frequency carrier wave signals between the low pressure power line communication device A and a low pressure power line communication device B; the low pressure power line communication device B receives the high frequency carrier wave signals from the coupling line and transmits the demodulated and treated data to a switch.
Description
Technical field
The utility model relates to the low-voltage power line communications field, is specifically related to a kind of low-voltage power line communication system.
Background technology
Power line communication technology (Power Line Communication) technology is called for short the PLC technology, is a kind of communication mode that utilizes multimedia services such as power distribution network low-voltage circuit transmission data, speech, image.Fig. 1 is the typical low-voltage power line communication system architecture figure of prior art.The communication bandwidth of this power communication system is limited between 2～30MHz, and the traffic rate that user terminal provides can reach 200Mbit/s, and mainly adopting with OFDM is the multiple spread spectrum technic of core.At user side, user terminal links to each other with power line communications apparatus (or PLC modulator-demodulator) by Ethernet interface or USB interface, and power line communications apparatus (or PLC modulator-demodulator) is directly inserted wall outlet.Low-voltage power line gang socket, electric supply meter and other power consumption equipment, electric power communication device (or PLC modulator-demodulator) at building power distribution station and opposite side links to each other, pass through switch and egress router and traditional communication mode such as optical fiber, CATV (Cable Television again, cable TV), xDSL (Digital Subscribe Line, the general name of various digital subscriber lines) etc. is connected to Internet.
Yet power line mainly is used for electric energy transmitting, is a kind of abominable communication media.Inserted a large amount of electric equipments on it, there are different systems and random noise, influence to communication channel is exactly noise, impedance, signal attenuation characteristic complexity, and time variation, randomness are big, so just make the carrier signal on this communication channel be subjected to serious decay and interference easily, actual transfer rate does not reach theoretical value far away.
Summary of the invention
The utility model provides a kind of low-voltage power line communication system, adopts the mode of phase line-zero line bearing carrier wave signal different with the conventional low electric line communication system, and this low-voltage power line communication system adopts zero line-data wire bearing carrier wave signal.Owing to reduced from the interference on the power circuit, thereby improved reliability of data transmission and transmission rate.
For this reason, the embodiment of the invention provides following technical scheme.
A kind of low-voltage power line communication system comprises low-voltage power line communication equipment A, coupling circuit, low-voltage power line communication equipment B, wherein:
Low-voltage power line communication equipment A, connect user terminal and reception data from user terminal, and data are become high-frequency carrier signal be coupled on the coupling circuit then, and reception sends user terminal to from the high-frequency carrier signal of coupling circuit and the data of process demodulation process;
Coupling circuit, form by zero line in the power line and dedicated data line, be coupling-connected on low-voltage power line communication equipment A and the low-voltage power line communication equipment B, high-frequency carrier signal is transmitted in the loop that utilizes zero line and dedicated data line to constitute between low-voltage power line communication equipment A and low-voltage power line communication equipment B;
Low-voltage power line communication equipment B, reception is from the high-frequency carrier signal of coupling circuit and will send switch or router through the data of demodulation process to, and receives from the data of switch or router and become high-frequency carrier signal and send low-voltage power line communication equipment A to by coupling circuit.
Preferably, low-voltage power line communication equipment A is identical with low-voltage power line communication equipment B structure, and comprise ethernet controller, control with storage, receive/send out device, A/D and D/A conversion, filtering and amplification, converge and line driving, power supply, wherein:
Ethernet controller provides Ethernet control and Ethernet interface independently to the data from user terminal;
Control and storage, and carry out high-speed data exchange between the ethernet controller, realize storage, set up high-speed data channel, protocol conversion is provided;
Receive/send out device, realize the Base-Band Processing and the modulation and demodulation of data, when sending data, to encode from the control and the data of storage, error control, framing, modulation; When receiving data,, carry out demodulation, decoding process A/D data converted from A/D and D/A conversion;
A/D and D/A conversion are when sending data, to carrying out the D/A conversion from the data of receiving/send out device; When receiving data, will be from filtering and amplifying signal gain amplifications, filtering, carry out A/D at last and change and send a receipts/device then to;
Filtering and amplification when received signal, are carried out filtering, shaping, amplification to the received signal of coming self-aggregation and line to drive, and send A/D and D/A conversion then to; When sending signal, the transmission signal from A/D and D/A conversion is carried out filtering, amplification, enhancing sends the driving force of signal, sends to then to converge with line to drive;
Converge and the line driving, sendaisle and receive path are pooled a signalling channel that links to each other with switch, and improve the circuit driving force that sends signal level lifting transmission signal, and realization is to the isolation of big voltage signal;
Power supply obtains electric energy from power line and offers described low-voltage power line communication system.
Low-voltage power line communication system provided by the utility model is utilized zero line-data wire bearing carrier wave signal, can improve reliability of data transmission and transmission rate on the circuit.
Description of drawings
Fig. 1 is the structure chart of the low-voltage power line communication system of prior art;
The structure chart of the low-voltage power line communication system that Fig. 2 provides for the utility model embodiment;
The structure chart of the low-voltage power line communication equipment that Fig. 3 provides for the utility model embodiment.
Embodiment
In order to make those skilled in the art person understand the scheme of the utility model embodiment better, the utility model embodiment is described in further detail below in conjunction with drawings and embodiments.
The low-voltage power line communication system that the utility model embodiment provides adopts zero line-data wire bearing carrier wave signal, promptly utilizes the zero line in the low-voltage power line, adds a dedicated data line and constitutes the loop, transmits carrier signal.As shown in Figure 2, be the structure chart of low-voltage power line communication system of zero line-data wire coupled modes of the utility model embodiment.This low-voltage power line communication system comprises user terminal 1, low-voltage power line communication equipment A 2, low-voltage power line communication equipment B 3, switch 4, coupling circuit 5, be with the low-voltage power line communication system difference of prior art shown in Figure 1, after modulating in low-voltage power line communication equipment A 2 from the data of user terminal 1, use zero line-data wire coupled modes bearing carrier wave signal, replace the phase line-ground wire coupled modes bearing carrier wave signal of electrification line in the prior art.Adopt the low-voltage power line communication system of this zero line-data wire coupled modes, communication bandwidth can be between 2～30MHz, because the interference on the coupling circuit 5 significantly reduces, so the reliability of data transmission on the coupling circuit 5 and actual transfer rate can further improve.
The course of work of this system is described below: at user side, user terminal 1 for example concentrator, video camera or the like meets ㄇ by Ethernet and links to each other with low-voltage power communication equipment A 2, low-voltage power communication equipment A 2 is coupled to for example electricity consumption data of data or digital video signal on the dedicated data line, zero line in this dedicated data line and the low-voltage power line constitutes coupling circuit 5, adopts zero line one data wire mode bearing carrier wave signal.At the other end of coupling circuit 5, adopt low-voltage power line communication equipment B 3 to isolate described data, by switch 4 and other network, described data are sent to power information net or Internet at last.Wherein, switch 4 is Ethernet switch in this embodiment, also can be ethernet router.User terminal 1 receives from the process of the data of switch 4 just in time opposite with said process, no longer applies here and states.
Fig. 3 is the structure chart of the low-voltage power line communication equipment A 2 in the system shown in Figure 2, and the structure of low-voltage power line communication equipment B 3 and Fig. 3's is identical, no longer applies here and states.This equipment comprise ethernet controller 21, control with storage 22, receive/send out that device 23, A/D and D/A change 24, filtering and amplification 25, converge and line driving 26, power supply 27, will specifically describe the each several part function below.
Ethernet controller 21 is finished the Ethernet controlled function based on IEEE 802.3 or IEEE 802.3u local area network standard, provides Ethernet control and independently Ethernet interface, for example fastethernet interface to the data from user terminal 1.
Control and storage 22, possess stronger data-handling capacity, processing speed and storage capacity faster, for the data from ethernet controller 21 realize the high-speed data exchange, set up high-speed data channel, protocol conversion is provided, realizes processing such as high-speed data storage.
Receive/send out device 23, realize the Base-Band Processing and the modulation and demodulation of data.When sending data, to encode from the control and the data of storage 22, error control, framing, modulation; When receiving data,, carry out inverse transformations such as demodulation, decoding process A/D data converted from A/D and D/A conversion 24.
A/D and D/A conversion 24 when sending data, are changed carrying out D/A from the data of receiving/send out device 23, and signal bandwidth are limited between 2～30MHz, satisfy the specification requirement of power line communication.When receiving data, will from filtering and the analog signal of amplifying 25 gain amplification, filtering, carry out the A/D conversion, send a receipts/device 23 then to.
Filtering and amplification 25 when received signal, are carried out filtering, shaping, amplification to the received signal of coming self-aggregation and line driving 26, send A/D and D/A conversion 24 then to; When sending signal, the transmission signal from A/D and D/A conversion 24 is carried out filtering, amplification, strengthen the driving force that sends signal, send to then and converge and line driving 26.
Converge with line and drive 26, converging with the effect of line drive circuit is that sendaisle and receive path are pooled a signalling channel that links to each other with the local side switch, and improves the circuit driving force that sends signal level lifting transmission signal.When the uneven situation of electricity consumption appears in the low voltage power transmission circuit, can have certain voltage on the zero line, so this circuit need have certain voltage endurance capability, big voltage signal is effectively isolated.
The concrete course of work of this equipment is as follows: when user terminal 1 sends data, by ethernet controller 21 data are sent to control and storage 22, under the control of CPU, through a series of processing such as protocol conversion, quick storage, send to a receipts/device 23, carry out processing such as digital coding, modulation, framing, transmit A/D and D/A conversion 26 then, carry out the D/A conversion to sending signal, after amplifying through filtering and the filtering of amplifying 25 then, send on the coupling circuit of forming by zero line-data wire 5 by converging with line driving 26; When user terminal 1 receives data, received signal extracts by converging with line driving 26, change 24 A/D conversion through filtering with the filtering and processing and amplifying, A/D and the D/A that amplify 25 again, enter into a receipts/device 23, recover initial data through separating to be in harmonious proportion to decipher to wait to handle, under the control of CPU in control and storage 22, carry out protocol conversion, through ethernet controller 21 received signal is sent to user terminal 1 at last.
More than the utility model embodiment is described in detail, used embodiment herein the utility model set forth, the explanation of above embodiment just is used for help understanding system of the present utility model and equipment; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (2)
1. a low-voltage power line communication system is characterized in that, comprises low-voltage power line communication equipment A, coupling circuit, low-voltage power line communication equipment B, wherein:
Low-voltage power line communication equipment A, connect user terminal and reception data from user terminal, and data are become high-frequency carrier signal be coupled on the coupling circuit then, and reception sends user terminal to from the high-frequency carrier signal of coupling circuit and the data of process demodulation process;
Coupling circuit, form by zero line in the power line and dedicated data line, be coupling-connected on low-voltage power line communication equipment A and the low-voltage power line communication equipment B, high-frequency carrier signal is transmitted in the loop that utilizes zero line and dedicated data line to constitute between low-voltage power line communication equipment A and low-voltage power line communication equipment B;
Low-voltage power line communication equipment B, reception is from the high-frequency carrier signal of coupling circuit and will send switch or router through the data of demodulation process to, and receives from the data of switch or router and become high-frequency carrier signal and send low-voltage power line communication equipment A to by coupling circuit.
2. low-voltage power line communication system according to claim 1, it is characterized in that, low-voltage power line communication equipment A is identical with low-voltage power line communication equipment B structure, and comprise ethernet controller, control and storage, receive/send out device, A/D and D/A conversion, filtering and amplification, converge and line driving, power supply, wherein:
Ethernet controller provides Ethernet control and Ethernet interface independently to the data from user terminal;
Control and storage, and carry out high-speed data exchange between the ethernet controller, realize storage, set up high-speed data channel, protocol conversion is provided;
Receive/send out device, realize the Base-Band Processing and the modulation and demodulation of data, when sending data, to encode from the control and the data of storage, error control, framing, modulation; When receiving data,, carry out demodulation, decoding process A/D data converted from A/D and D/A conversion;
A/D and D/A conversion are when sending data, to carrying out the D/A conversion from the data of receiving/send out device; When receiving data, will be from filtering and amplifying signal gain amplifications, filtering, carry out A/D at last and change and send a receipts/device then to;
Filtering and amplification when received signal, are carried out filtering, shaping, amplification to the received signal of coming self-aggregation and line to drive, and send A/D and D/A conversion then to; When sending signal, the transmission signal from A/D and D/A conversion is carried out filtering, amplification, enhancing sends the driving force of signal, sends to then to converge with line to drive;
Converge and the line driving, sendaisle and receive path are pooled a signalling channel that links to each other with switch, and improve the circuit driving force that sends signal level lifting transmission signal, and realization is to the isolation of big voltage signal;
Power supply obtains electric energy from power line and offers described low-voltage power line communication system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201075505U CN202059409U (en) | 2011-04-07 | 2011-04-07 | Zero line-data line coupling mode low pressure power line communication system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201075505U CN202059409U (en) | 2011-04-07 | 2011-04-07 | Zero line-data line coupling mode low pressure power line communication system |
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| CN202059409U true CN202059409U (en) | 2011-11-30 |
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| CN2011201075505U Expired - Fee Related CN202059409U (en) | 2011-04-07 | 2011-04-07 | Zero line-data line coupling mode low pressure power line communication system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162495A (en) * | 2015-07-04 | 2015-12-16 | 青岛东软载波科技股份有限公司 | Multi-node low-voltage DC power line wide-band communication system and method |
| CN105553517A (en) * | 2015-12-17 | 2016-05-04 | 广州市雅江光电设备有限公司 | Differential signal transmission method implemented in to-ground differential way |
| CN107276635A (en) * | 2017-08-22 | 2017-10-20 | 北京智芯微电子科技有限公司 | A kind of carrier communication module of concentrator |
| CN108390700A (en) * | 2018-04-17 | 2018-08-10 | 东莞市慧眼数字技术有限公司 | The coupling device of signal feed-in high-voltage carrier will be detected |
-
2011
- 2011-04-07 CN CN2011201075505U patent/CN202059409U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162495A (en) * | 2015-07-04 | 2015-12-16 | 青岛东软载波科技股份有限公司 | Multi-node low-voltage DC power line wide-band communication system and method |
| CN105553517A (en) * | 2015-12-17 | 2016-05-04 | 广州市雅江光电设备有限公司 | Differential signal transmission method implemented in to-ground differential way |
| CN107276635A (en) * | 2017-08-22 | 2017-10-20 | 北京智芯微电子科技有限公司 | A kind of carrier communication module of concentrator |
| CN108390700A (en) * | 2018-04-17 | 2018-08-10 | 东莞市慧眼数字技术有限公司 | The coupling device of signal feed-in high-voltage carrier will be detected |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20120407 |