CN202524385U - OFDM-based hybrid power line carrier communication device - Google Patents
OFDM-based hybrid power line carrier communication device Download PDFInfo
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- CN202524385U CN202524385U CN201220130385XU CN201220130385U CN202524385U CN 202524385 U CN202524385 U CN 202524385U CN 201220130385X U CN201220130385X U CN 201220130385XU CN 201220130385 U CN201220130385 U CN 201220130385U CN 202524385 U CN202524385 U CN 202524385U
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Abstract
The utility model relates to an OFDM-based hybrid power line carrier communication device connected with a low-voltage power line, which comprises a three-phase carrier module, a concentrator, a single-phase carrier module, a carrier collector, an RS485 electric energy meter and a carrier electric energy meter. Both the three-phase carrier module and the single-phase carrier module are connected with the low-voltage power line. The concentrator is connected with the three-phase carrier module via a UART. The single-phase carrier module is connected with the carrier collector or the carrier electric energy meter via the UART. The RS485 electrical energy meter is connected with the carrier collector. The concentrator is connected with an upper machine via a GPRS. Compared with the prior art, the OFDM-based hybrid power line carrier communication device can improve the anti-multipath fading performance and has the advantages of strong anti-interference ability, simple structure and the like.
Description
Technical field
The utility model relates to a kind of device for power line carrier communications, especially relates to a kind of hybrid power line carrier communication device based on OFDM.
Background technology
Along with the modern needs of system of State Grid management of power supply and power utilization, traditional hand is checked meter, handheld terminal is checked meter, the vehicular radio meter reading method is incompatible, and increasing automatic automatic meter reading system has got into the practical stage.These kilowatt meter reading-out system high efficiency, electric quantity metering is accurate, and the supervision and the management function of many electricity consumptions can also be provided.What use always in the automatic meter reading system automatically is the power line carrier meter reading method, but because the Harmonic Interference of electric power networks and attenuation characteristic etc., power-line carrier communication is always not fully up to expectations.And OFDM (OFDM) modulation technique is applied in the low pressure field of checking meter to realizing anti-interference efficiently modulation technique and improving band efficiency and opened up a new path.The application of OFDM modulation technique can be traced back to twentieth century sixties, is mainly used in military high frequency communication system, and also once being considered is applied to high speed modem.The OFDM technology has been widely used in the Voice & Video field and commercial signal communication system of broadcast type at present.
OFDM is a kind of high speed transmission technology of digital signal, and this technological basic principle is that high-speed serial data is transformed into the parallel data of the relative low speed of multichannel and different carrier waves is modulated.This parallel transmission system has been expanded the pulse duration of symbol greatly, has improved the performance of anti-multipath decline.Modern ofdm system adopts Digital Signal Processing, and the generation of each subcarrier and reception are all accomplished by digital signal processing algorithm, have greatly simplified the structure of system.In order to improve the availability of frequency spectrum, make the frequency spectrum on each subcarrier overlapped, but these frequency spectrums satisfy orthogonality in whole symbol period simultaneously, thereby guarantee receiving terminal release signal without distortion.
The OFDM orthogonal frequency division multiplexi is because its antijamming capability is strong, the traffic data transmission rate advantages of higher has obtained extensive utilization in various communication systems; So but because it realizes that complicacy is not also used in power line carrier communication field, low pressure carrier wave arrowband at present on a large scale, but OFDM is confirmed in American-European industry as reading technique of future generation.OFDM can cover all frequencies in the prescribed bandwidth, reaches all frequency good use through its modulating characteristic, through distinct methods different frequent points initiatively or is automatically selected.Because it can be provided with a lot of subcarriers, and different frequent points is utilized respectively, the content of the automatic adjustment in the back subcarrier that is interfered and frequency are to reach best communication efficiency and reliability.
Summary of the invention
The purpose of the utility model is exactly that a kind of anti-multipath decline performance, hybrid power line carrier communication device based on OFDM that antijamming capability is strong of improving is provided in order to overcome the defective that above-mentioned prior art exists.
The purpose of the utility model can realize through following technical scheme:
A kind of hybrid power line carrier communication device based on OFDM; This device is connected with low-voltage power line; This device comprises three-phase carrier module, concentrator, single-phase carrier module, carrier acquisition device, RS485 electric energy meter and carrier electric energy meter; Described three-phase carrier module all is connected with low-voltage power line with single-phase carrier module, and described concentrator is connected with the three-phase carrier module through UART, and described single-phase carrier module connects carrier acquisition device or carrier electric energy meter through UART; Described RS485 electric energy meter is connected with the carrier acquisition device, and described concentrator is connected to host computer through GPRS.
Described carrier electric energy meter is provided with a plurality of, each carrier electric energy meter respectively with a corresponding connection of single-phase carrier module.
Described carrier acquisition device is provided with a plurality of, each carrier acquisition device respectively with a corresponding connection of single-phase carrier module.
Described carrier acquisition device connects a plurality of RS485 electric energy meters.
Compared with prior art, the utility model adopts the OFDM orthogonal frequency division multiplexi, and with RS485 electric energy meter and carrier electric energy meter mixing application, antijamming capability is strong, and traffic data transmission rate is high, can improve anti-multipath decline performance, and is applied widely.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
As shown in Figure 1; A kind of hybrid power line carrier communication device based on OFDM; This device is connected with low-voltage power line 1, and this device comprises three-phase carrier module 2, concentrator 4, single-phase carrier module 3, carrier acquisition device 5, RS485 electric energy meter 7 and carrier electric energy meter 6, and three-phase carrier module 2 all is connected with low-voltage power line 1 with single-phase carrier module 3; Three-phase carrier module 2 connects concentrator 4 through UART, and concentrator 4 is connected to host computer 8 through GPRS; Single-phase carrier module 3 is provided with a plurality of; The single-phase carrier module 3 of part connects carrier acquisition device 5 and RS485 electric energy meter 7 successively through UART; All the other single-phase carrier modules 3 directly connect carrier electric energy meter 6 through UART, and carrier acquisition device 5 can connect a plurality of RS485 electric energy meters 7.
RS485 electric energy meter 6 recording user electricity consumption data; The data that carrier acquisition device 5 is gathered connected a plurality of RS485 electric energy meters 6; With the single-phase carrier module 3 of transfer of data to correspondence; Simultaneously carrier electric energy meter 6 recording user electricity consumption data and with transfer of data to corresponding single-phase carrier module 3, with transfer of data to three-phase carrier module 2, three-phase carrier module 2 is given concentrator 4 through UART with transfer of data to single-phase carrier module 3 through low-voltage power line 1; Concentrator 4 is preserved data, and data are transferred to host computer 8 through GPRS.
Claims (4)
1. hybrid power line carrier communication device based on OFDM; This device is connected with low-voltage power line; It is characterized in that this device comprises three-phase carrier module, concentrator, single-phase carrier module, carrier acquisition device, RS485 electric energy meter and carrier electric energy meter, described three-phase carrier module all is connected with low-voltage power line with single-phase carrier module; Described concentrator is connected with the three-phase carrier module through UART; Described single-phase carrier module connects carrier acquisition device or carrier electric energy meter through UART, and described RS485 electric energy meter is connected with the carrier acquisition device, and described concentrator is connected to host computer through GPRS.
2. a kind of hybrid power line carrier communication device based on OFDM according to claim 1 is characterized in that described carrier electric energy meter is provided with a plurality of, each carrier electric energy meter respectively with a corresponding connection of single-phase carrier module.
3. a kind of hybrid power line carrier communication device based on OFDM according to claim 1 is characterized in that described carrier acquisition device is provided with a plurality of, each carrier acquisition device respectively with a corresponding connection of single-phase carrier module.
4. a kind of hybrid power line carrier communication device based on OFDM according to claim 3 is characterized in that described carrier acquisition device connects a plurality of RS485 electric energy meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220130385XU CN202524385U (en) | 2012-03-30 | 2012-03-30 | OFDM-based hybrid power line carrier communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220130385XU CN202524385U (en) | 2012-03-30 | 2012-03-30 | OFDM-based hybrid power line carrier communication device |
Publications (1)
| Publication Number | Publication Date |
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| CN202524385U true CN202524385U (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201220130385XU Expired - Lifetime CN202524385U (en) | 2012-03-30 | 2012-03-30 | OFDM-based hybrid power line carrier communication device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106571885A (en) * | 2015-01-23 | 2017-04-19 | 国网浙江省电力公司湖州供电公司 | Electric power system on-site carrier wave signal intensity debugging apparatus |
-
2012
- 2012-03-30 CN CN201220130385XU patent/CN202524385U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106571885A (en) * | 2015-01-23 | 2017-04-19 | 国网浙江省电力公司湖州供电公司 | Electric power system on-site carrier wave signal intensity debugging apparatus |
| CN106571884A (en) * | 2015-01-23 | 2017-04-19 | 国网浙江省电力公司湖州供电公司 | Debugging device for on-site carrier signal intensity of electric power system |
| CN106571885B (en) * | 2015-01-23 | 2019-11-26 | 国网浙江省电力公司湖州供电公司 | A kind of electric system scene carrier signal strength debugging apparatus |
| CN106571884B (en) * | 2015-01-23 | 2019-11-26 | 国网浙江省电力公司湖州供电公司 | Electric system scene carrier signal strength debugging apparatus |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121107 |
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| CX01 | Expiry of patent term |