CN103178873A - Narrow-band high-speed communication system based on low-voltage power line carriers - Google Patents
Narrow-band high-speed communication system based on low-voltage power line carriers Download PDFInfo
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- CN103178873A CN103178873A CN 201110452405 CN201110452405A CN103178873A CN 103178873 A CN103178873 A CN 103178873A CN 201110452405 CN201110452405 CN 201110452405 CN 201110452405 A CN201110452405 A CN 201110452405A CN 103178873 A CN103178873 A CN 103178873A
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Abstract
The invention discloses a narrow-band high-speed communication system based on low-voltage power line carriers. The system comprises a carrier signal coupling circuit, a carrier transmitting circuit, a carrier receiving circuit, a modulation-demodulation circuit and a communication interface circuit, the modulation-demodulation circuit comprises a digital signal processor, a digital-to-analog conversion circuit, an analog-to-digital conversion circuit, a signal power amplification circuit and a filter circuit, and the communication interface circuit comprises a serial port communication circuit, an Ethernet communication interface circuit, a USB (universal serial bus) communication interface circuit and an RJ-11 communication interface circuit which are all connected with the digital signal processor. The system is simple in structure, reasonable in design, high in electromagnetic compatibility and anti-interference performance, complete in function, high in practicality, high in popularization and application value, and capable of reducing bandwidth pressure of narrow bands to achieve high-speed transmission, and is a key of improving power communication quality.
Description
Technical field
The present invention relates to the power-line carrier communication field, especially relate to a kind of narrow-band high-speed communication system based on low voltage power line carrier.
Background technology
Along with the development of the communication technology, voltage power-line carrier communication technology is used widely at electric energy and various energy measurements fields.But present various power line carrier communication scheme all comes with some shortcomings, be mainly manifested in the following aspects: the carrier wave transtation mission circuit at first present carrier communication module generally only plays the signal that the carrier Control chip is sent and amplifies, close circuit by misfortune again and bring disaster upon the effect that is incorporated on electrical network, the time can not control its output current when the 12V supply voltage is pulled down to the 6.5V left and right, thereby often make the 12V supply voltage be pulled down to too low and cause whole system to work.Moreover in carrier communication module, carrier signal A closes in circuit the mostly relatively poor high pressure ceramic disc capacitor of serviceability temperature coefficient, this capacitance can change along with the variation of temperature larger, when use in the zone in northern China such as Heilungkiang etc., the appearance value of this electric capacity can reduce gradually along with the reduction of temperature, thereby use the center frequency point of the resonant circuit of this electric capacity be offset or former the design's product internal resistance is changed, finally can cause carrier communication communication success rate to reduce, affect the practical effect of product.Narrow-band high-speed transmission based on low voltage power line carrier is the key that improves the power communication quality.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, and a kind of narrow-band high-speed communication system based on low voltage power line carrier is provided, and it is simple in structure, reasonable in design, it is convenient to realize, can greatly reduce the bandwidth pressure of arrowband, reaches the purpose of high-speed transfer, Electro Magnetic Compatibility is good, strong interference immunity, complete function, practical, be the key that improves the power communication quality, application value is high.
for solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of narrow-band high-speed communication system based on low voltage power line carrier, it is characterized in that: comprise the carrier signal coupling circuit that joins by isolating transformer and power line, be connected on the carrier wave transtation mission circuit of carrier signal coupling circuit input, be connected on the carrier wave receiving circuit of carrier signal coupling circuit output, the modulation-demodulation circuit that joins with carrier wave transtation mission circuit and carrier wave receiving circuit and the communication interface circuit that joins with modulation-demodulation circuit, described modulation-demodulation circuit comprises digital signal processor, the D/A converting circuit and the analog to digital conversion circuit that join with digital signal processor, the signal power amplifying circuit that all joins with D/A converting circuit and analog to digital conversion circuit and the filter circuit that joins with the signal power amplifying circuit, input and the filter circuit of described carrier wave transtation mission circuit join, output and the filter circuit of described carrier wave receiving circuit join, the ethernet interface circuit that described communication interface circuit comprises for the serial communication interface circuit that is connected with base table, be used for being connected with computer is connected with the usb communication interface circuit and is used for the RJ-11 communication interface circuit that is connected with phone, and described serial communication interface circuit, ethernet interface circuit, usb communication interface circuit and RJ-11 communication interface circuit all join with digital signal processor.
The above-mentioned narrow-band high-speed communication system based on low voltage power line carrier is characterized in that: described digital signal processor is chip TMS320VC5410.
The above-mentioned narrow-band high-speed communication system based on low voltage power line carrier is characterized in that: described ethernet interface circuit comprises chip AT8989UP.
The present invention compared with prior art has the following advantages:
1, of the present invention simple in structure, reasonable in design, it is convenient to realize.
2, the digital signal processor in the present invention transmits after analog signal conversion can being become digital signal, can reduce data volume, and the minimizing of data volume can make the transmission time shorten; Simultaneously, can carry out frequency division for the setting of collection signal and process, guarantee that the level of frequency can reduce the bandwidth pressure of arrowband greatly, reaches the purpose of high-speed transfer.
3, Electro Magnetic Compatibility of the present invention is good, strong interference immunity.
4, the communication interface circuit in the present invention comprises for the serial communication interface circuit that is connected with base table, is connected with the usb communication interface circuit for the RJ-11 communication interface circuit that is connected with phone for the ethernet interface circuit that is connected with computer, the external equipment that can connect is many, complete function.
5, of the present invention practical, be the key that improves the power communication quality, application value is high.
In sum, the present invention is simple in structure, and is reasonable in design, and it is convenient to realize, can greatly reduce the bandwidth pressure of arrowband, reach the purpose of high-speed transfer, Electro Magnetic Compatibility is good, strong interference immunity, complete function, practical, be the key that improves the power communication quality, application value is high.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is schematic block circuit diagram of the present invention.
Description of reference numerals:
1-carrier signal coupling circuit; The 2-isolating transformer; 3-carrier wave receiving circuit;
The 4-modulation-demodulation circuit; The 4-1-digital signal processor; The 4-2-D/A converting circuit;
The 4-3-analog to digital conversion circuit; 4-4-signal power amplifying circuit;
The 4-5-filter circuit; The 5-communication interface circuit;
5-1-serial communication interface circuit; 5-2-ethernet interface circuit;
The 5-3-USB communication interface circuit; The 5-4-RJ-11 communication interface circuit;
The 6-base table; The 7-computer; The 8-phone;
9-carrier wave transtation mission circuit; The 10-power line.
Embodiment
as shown in Figure 1, the present invention includes the carrier signal coupling circuit 1 that joins by isolating transformer 2 and power line 10, be connected on the carrier wave transtation mission circuit 9 of carrier signal coupling circuit 1 input, be connected on the carrier wave receiving circuit 3 of carrier signal coupling circuit 1 output, the modulation-demodulation circuit 4 that joins with carrier wave transtation mission circuit 9 and carrier wave receiving circuit 3 and the communication interface circuit 5 that joins with modulation-demodulation circuit 4, described modulation-demodulation circuit 4 comprises digital signal processor 4-1, the D/A converting circuit 4-2 and the analog to digital conversion circuit 4-3 that join with digital signal processor 4-1, the signal power amplifying circuit 4-4 that all joins with D/A converting circuit 4-2 and analog to digital conversion circuit 4-3 and the filter circuit 4-5 that joins with signal power amplifying circuit 4-4, the input of described carrier wave transtation mission circuit 9 and filter circuit 4-5 join, the output of described carrier wave receiving circuit 3 and filter circuit 4-5 join, the ethernet interface circuit 5-2 that described communication interface circuit 5 comprises for the serial communication interface circuit 5-1 that is connected with base table 6, be used for being connected with computer 7 is connected with usb communication interface circuit 5-3 and is used for the RJ-11 communication interface circuit 5-4 that is connected with phone 8, and described serial communication interface circuit 5-1, ethernet interface circuit 5-2, usb communication interface circuit 5-3 and RJ-11 communication interface circuit 5-4 all join with digital signal processor 4-1.
As shown in Figure 1, in the present embodiment, described digital signal processor 4-1 is chip TMS320VC5410.Described ethernet interface circuit 5-2 comprises chip AT8989UP.
the course of work of the present invention is: communication interface circuit 5 is that power line modem is with the interface of the bidirectional data transfers between subscriber equipment, digital signal processor 4-1 is responsible for the two-way communication between subscriber equipment, to encode from user's data, be sent to successively D/A converting circuit 4-2 after modulation, signal power amplifying circuit 4-4 and filter circuit 4-5 carry out digital-to-analogue conversion, amplify, filtering sends on power line 10 by carrier wave transtation mission circuit 9 and isolating transformer 2, perhaps, high-frequency carrier signal from power line 10 is transferred to filter circuit 4-5 successively through isolating transformer 2 and carrier wave receiving circuit 3, signal power amplifying circuit 4-4 and analog to digital conversion circuit 4-3, through filtering, export to digital signal processor 4-1 after amplification and magic conversion, digital signal processor 4-1 carries out demodulation to this signal, be sent to subscriber equipment after decoding.
The above; it is only preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, every any simple modification, change and equivalent structure of above embodiment being done according to the technology of the present invention essence changes, and all still belongs in the protection range of technical solution of the present invention.
Claims (3)
1. narrow-band high-speed communication system based on low voltage power line carrier, it is characterized in that: comprise the carrier signal coupling circuit (1) that joins by isolating transformer (2) and power line (10), be connected on the carrier wave transtation mission circuit (9) of carrier signal coupling circuit (1) input, be connected on the carrier wave receiving circuit (3) of carrier signal coupling circuit (1) output, the modulation-demodulation circuit (4) that joins with carrier wave transtation mission circuit (9) and carrier wave receiving circuit (3) and the communication interface circuit (5) that joins with modulation-demodulation circuit (4), described modulation-demodulation circuit (4) comprises digital signal processor (4-1), the D/A converting circuit (4-2) and the analog to digital conversion circuit (4-3) that join with digital signal processor (4-1), the signal power amplifying circuit (4-4) that all joins with D/A converting circuit (4-2) and analog to digital conversion circuit (4-3) and the filter circuit (4-5) that joins with signal power amplifying circuit (4-4), the input of described carrier wave transtation mission circuit (9) and filter circuit (4-5) join, the output of described carrier wave receiving circuit (3) and filter circuit (4-5) join, described communication interface circuit (5) comprises the serial communication interface circuit (5-1) that is connected for base table (6), the ethernet interface circuit (5-2) that is used for being connected with computer (7) is connected 5-3 with the usb communication interface circuit) and for the RJ-11 communication interface circuit (5-4) that is connected with phone (8), described serial communication interface circuit (5-1), ethernet interface circuit (5-2), usb communication interface circuit (5-3) and RJ-11 communication interface circuit (5-4) all join with digital signal processor (4-1).
2. according to the narrow-band high-speed communication system based on low voltage power line carrier claimed in claim 1, it is characterized in that: described digital signal processor (4-1) is chip TMS320VC5410.
3. according to the narrow-band high-speed communication system based on low voltage power line carrier claimed in claim 1, it is characterized in that: described ethernet interface circuit (5-2) comprises chip AT8989UP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110452405 CN103178873A (en) | 2011-12-20 | 2011-12-20 | Narrow-band high-speed communication system based on low-voltage power line carriers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110452405 CN103178873A (en) | 2011-12-20 | 2011-12-20 | Narrow-band high-speed communication system based on low-voltage power line carriers |
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| CN103178873A true CN103178873A (en) | 2013-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110452405 Pending CN103178873A (en) | 2011-12-20 | 2011-12-20 | Narrow-band high-speed communication system based on low-voltage power line carriers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746723A (en) * | 2013-12-19 | 2014-04-23 | 天津光电通信技术有限公司 | Wired channel information connecting device |
| CN103991768A (en) * | 2014-05-28 | 2014-08-20 | 上海新时达电气股份有限公司 | Elevator Internet of Things voice calming device and method |
| CN106130854A (en) * | 2016-06-23 | 2016-11-16 | 北京东土科技股份有限公司 | Industrial process control system based on industry internet |
-
2011
- 2011-12-20 CN CN 201110452405 patent/CN103178873A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746723A (en) * | 2013-12-19 | 2014-04-23 | 天津光电通信技术有限公司 | Wired channel information connecting device |
| CN103746723B (en) * | 2013-12-19 | 2016-03-30 | 天津光电通信技术有限公司 | Wired paths information draws the equipment of connecing |
| CN103991768A (en) * | 2014-05-28 | 2014-08-20 | 上海新时达电气股份有限公司 | Elevator Internet of Things voice calming device and method |
| CN106130854A (en) * | 2016-06-23 | 2016-11-16 | 北京东土科技股份有限公司 | Industrial process control system based on industry internet |
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Application publication date: 20130626 |