CN201893782U - Carrier communication device for power line - Google Patents
Carrier communication device for power line Download PDFInfo
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- CN201893782U CN201893782U CN2010205694660U CN201020569466U CN201893782U CN 201893782 U CN201893782 U CN 201893782U CN 2010205694660 U CN2010205694660 U CN 2010205694660U CN 201020569466 U CN201020569466 U CN 201020569466U CN 201893782 U CN201893782 U CN 201893782U
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- Prior art keywords
- power line
- communication interface
- ofdm
- signal
- communication device
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Abstract
The utility model provides a carrier communication device for a power line, comprising a communication interface, a central processing unit, an amplifying circuit and a coupling circuit which are connected sequentially, wherein the communication interface is used for receiving signals of a system to meter reading requirements in real time; the central processing unit is used for modulating the signals received from the communication interface into OFDM (Orthogonal Frequency Division Multiplexing) code signals; the amplifying circuit is used for amplifying the OFDM code signals; and the coupling circuit is used for coupling the amplified OFDM code signals to the power line. The utility model has the advantages that the subscriber number born by a concentrator is greatly decreased, so that the number of electricity meters need to be managed is decreased and then the requirement of the transmission range is directly reduced. As the communication device adopts the OFDM modulation mode, the intersymbol interference is avoided, and the reliability of the data transmission is greatly improved.
Description
[technical field]
The utility model relates to a kind of automatic meter reading system, the device for power line carrier communications that particularly uses in automatic meter reading system.
[background technology]
In the existing automatic meter reading system, power line carrier problem unstable and that be subject to disturb in arrowband is not well solved for many years always.Mainly contain two factors: one is the impedance operator and the decay thereof of electric power networks, and another is an interference of noise.First factor is restricting the transmission range of signal, and second factor determining the quality of transfer of data.In the application of checking meter in the arrowband, existing carrier module major part is based on the FSK modulation technique, some use be spread spectrum.In actual applications, actual requirement for the load that adapts to different electric network compositions, different residential block and different time acute variation, no matter be the FSK modulation, or the power line carrier system of band spectrum modulation, all must be in light of the circumstances by relay or add high-power measures such as (in allowed limits) and extend transmission distance and improve transmission reliability, even so, arrowband PLC checks meter and is difficult to also realize that round-the-clock reliable ammeter data copies and accepts.
[utility model content]
The technical problems to be solved in the utility model is to provide a kind of device for power line carrier communications that can reduce the meter reading time of demand, raising data accuracy rate and system to transmission range.
The technical problems to be solved in the utility model is achieved in that a kind of device for power line carrier communications, comprise the communication interface, CPU, amplifying circuit and the coupling circuit that connect successively, the signal of the real-time receiving system of described communication interface to checking meter and requiring; CPU will be modulated into the code signal of OFDM (OFDM) from the signal that communication interface receives; Amplifying circuit amplifies ofdm signal; Ofdm signal after coupling circuit will amplify is coupled in the power line.
Described communication interface adopts the UART communication interface.
Described CPU adopts the ARM microprocessor, and described ARM microprocessor comprises an INT6400 and INT1400 chipset.
Advantage of the present utility model is: for the transmission range problem owing to adopt distributed structure/architecture, thereby reduced the number of users that concentrator is born greatly, and then reduced the ammeter number of required management and then directly reduced the requirement of transmission range.For the quality problems of transfer of data, because this module has adopted the modulation system of OFDM, the phenomenon that intersymbol interferes with each other can not take place, thereby greatly improve reliability of data transmission.Since the broadband check meter have the arrowband can't compare, accuracy, promptness and high bandwidth utilize broadband P LC to check meter, and can realize that the real-time that conventional art can't be realized copies and accepts, thereby realize real-time monitoring to power consumption, and for the realization of pre-payment provides may.
[description of drawings]
In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.
Fig. 1 is the structured flowchart of the utility model device for power line carrier communications;
[embodiment]
See also shown in Figure 1, a kind of device for power line carrier communications of the utility model, comprise the communication interface, CPU, amplifying circuit and the coupling circuit that connect successively, described communication interface adopts the UART communication interface, described CPU adopts the ARM microprocessor, and the ARM microprocessor comprises an INT6400 and INT1400 chipset.
Described UART communication interface is used for the signal of real-time receiving system to checking meter and requiring; The signal that the ARM microprocessor is used for receiving from the UART communication interface is modulated into the code signal of OFDM; Amplifying circuit is used for ofdm signal is amplified; Coupling circuit is used for the ofdm signal after amplifying is coupled to power line.
Operation principle of the present utility model is as follows: the UART communication interface receives the instruction of system to checking meter in real time; The ARM microprocessor is finished the code signal that the signal that will receive from the UART communication interface is modulated into OFDM; Amplifying circuit will be amplified by the ofdm signal after the modulation of ARM microprocessor; Signal after the amplification is coupled in the power line through coupling circuit, thereby finishes the communication of serial ports to PLC.
Claims (4)
1. a device for power line carrier communications is characterized in that: comprise the communication interface, CPU, amplifying circuit and the coupling circuit that connect successively, the signal of the real-time receiving system of described communication interface to checking meter and requiring; CPU will be modulated into the code signal of OFDM from the signal that communication interface receives; Amplifying circuit amplifies ofdm signal; Ofdm signal after coupling circuit will amplify is coupled in the power line.
2. device for power line carrier communications according to claim 1 is characterized in that: described communication interface adopts the UART communication interface.
3. device for power line carrier communications according to claim 1 is characterized in that: described CPU adopts the ARM microprocessor.
4. device for power line carrier communications according to claim 3 is characterized in that: described ARM microprocessor comprises an INT6400 and INT1400 chipset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205694660U CN201893782U (en) | 2010-10-20 | 2010-10-20 | Carrier communication device for power line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205694660U CN201893782U (en) | 2010-10-20 | 2010-10-20 | Carrier communication device for power line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201893782U true CN201893782U (en) | 2011-07-06 |
Family
ID=44223252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205694660U Expired - Fee Related CN201893782U (en) | 2010-10-20 | 2010-10-20 | Carrier communication device for power line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201893782U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299728A (en) * | 2011-08-24 | 2011-12-28 | 北京福星晓程电子科技股份有限公司 | Power line carrier communication sending method based on time frequency coding and device |
| CN102752025A (en) * | 2012-07-20 | 2012-10-24 | 天津工大瑞工光电技术有限公司 | Communication system based on power line and visible lights |
| CN105005329A (en) * | 2015-07-28 | 2015-10-28 | 太原理工大学 | Mining automatic water drainage device applying carrier wave |
-
2010
- 2010-10-20 CN CN2010205694660U patent/CN201893782U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299728A (en) * | 2011-08-24 | 2011-12-28 | 北京福星晓程电子科技股份有限公司 | Power line carrier communication sending method based on time frequency coding and device |
| CN102299728B (en) * | 2011-08-24 | 2015-09-30 | 北京福星晓程电子科技股份有限公司 | A kind of sending method of the power line carrier communication based on time frequency coding and device |
| CN102752025A (en) * | 2012-07-20 | 2012-10-24 | 天津工大瑞工光电技术有限公司 | Communication system based on power line and visible lights |
| CN105005329A (en) * | 2015-07-28 | 2015-10-28 | 太原理工大学 | Mining automatic water drainage device applying carrier wave |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: State Grid Information & Communication Technology Co., Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: State Grid Information & Communication Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20131020 |