CN105680908A - Full frequency band power line carrier communication method - Google Patents
Full frequency band power line carrier communication method Download PDFInfo
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- CN105680908A CN105680908A CN201610152998.6A CN201610152998A CN105680908A CN 105680908 A CN105680908 A CN 105680908A CN 201610152998 A CN201610152998 A CN 201610152998A CN 105680908 A CN105680908 A CN 105680908A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/544—Setting up communications; Call and signalling arrangements
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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Abstract
The invention discloses a full frequency band power line carrier communication method, and the method comprises the steps: a BPLC processer is used as a main controller for acquiring data, the main controller comprises two acquisition channels respectively to execute data transmission based on broadband carrier wave and data transmission based on narrowband transmission, and each acquisition channel can individually operate to acquire data; the two acquisition channels are a broadband carrier wave acquisition channel and a narrowband carrier wave acquisition channel, the broadband carrier wave acquisition channel comprises a BPLC transmitting and receiving circuit and a BPLC coupling circuit, and the narrowband carrier wave acquisition channel comprises a narrowband carrier wave transmitting circuit, a narrowband carrier wave receiving circuit, a narrowband signal coupling circuit and a zero-crossing circuit; and the method can remarkably improve meter reading success rate and has high efficient on meter reading.
Description
Technical field
The present invention be more particularly directed to a kind of Whole frequency band power-line carrier communication method, for the data transcription of strapping table.
Background technology
Domestic from 1996, have part producer to start to study power line carrier communication to check meter for power line, to exploitation in 2006, the company paying close attention to power line carrier communication increases rapidly, but major part is for using general single chip, in the modulation and demodulation of micro-chip inside exploitation software simulating power line carrier, the carrier communication mode that this kind of mode is developed is referred to as narrowband carrier, because its communication bandwidth is from 3K-50KHz not etc., narrower bandwidth, and communication speed is from 50bps-5.4kbps not etc., but because it is bigger by the interference ratio of electrical network, point-to-point success ratio is not high, particularly in electrical network peak times of power consumption, substantially data cannot be copied and accepted, so beginning morning 0 in every day is all selected in the ammeter copy reading of resident.
Along with the call of the strong intelligent grid of nation-building, this kind of signalling methods due to communication speed low, bigger data transmit-receive cannot be carried, a kind of faster speed of market demand, the more communication technology of high success rate, international high pass, mstar, domestic Huawei Hai Si recommends the broadband power line carrier communication chip based on international standard Homeplug in succession, the range of frequency of its communication is 2MHz-30MHz, highest communication speed can reach 1Gbps, it is widely used on the electric power cat of family online, because bandwidth carrier communication frequency height, signal is decayed soon on power line, simultaneously power line be sunken cord time, communication distance is very short, the portion within the family that is only suitable for uses. in order to this technology being applied on power line carrier checks meter, by the communication rate reduction of bandwidth carrier to 10Mbps, in extreme environments, communication speed can be reduced to 3Mbps, point-to-point communication distance obtains certain lifting, but in the poor power distribution station of some environment, when particularly sunkening cord entirely, communication success ratio is very low, cannot meet the demand of checking meter of the top and bottom equally.
Therefore, it is necessary to design a kind of power-line carrier communication method for checking meter newly.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of Whole frequency band power-line carrier communication method, and this Whole frequency band power-line carrier communication method can significantly improve the success ratio checked meter.
The technical solution of invention is as follows:
A kind of Whole frequency band power-line carrier communication method, using BPLC treater as the principal controller for data gathering;There are two acquisition channels and perform the transfer based on bandwidth carrier and the transfer based on narrow band transmission respectively; Every bar acquisition channel can work independently with image data;
These two acquisition channels are bandwidth carrier acquisition channel and narrowband carrier acquisition channel respectively;
BPLC refers to broadband power line carrier communication;
Bandwidth carrier acquisition channel comprises BPLC and receives and dispatches circuit and BPLC matching circuit; The broadband transmitting-receiving port of side and BPLC treater that BPLC receives and dispatches circuit is connected, and another side that BPLC receives and dispatches circuit is connected with power line by BPLC matching circuit;
Narrowband carrier acquisition channel comprises narrowband carrier and sends circuit, narrowband carrier receiving circuit, narrow band signal matching circuit and zero crossing circuitry;
Narrowband carrier sends circuit and narrowband carrier receiving circuit is all arranged between narrow band signal matching circuit and BPLC treater; Narrow band signal matching circuit is connected with power line; Narrowband carrier sends circuit and is connected with the pin of narrowband carrier receiving circuit with BPLC treater; Here pin comprises common General Purpose I/O pins, and I/O pin can as enable signal output terminal, and pin can also be DAC pin (i.e. the output terminal of the DAC that BPLC treater is inner integrated), by the output of DAC pin energy analog sine; DAC pin refers to that numeral turns simulating signal pin;
The input termination power line of zero crossing circuitry, the I/O port of the output termination BPLC treater of zero crossing circuitry;
Produce narrow band carrier modulation signal by BPLC treater and it is sent to narrowband carrier transmission circuit, and the narrowband carrier signal received by narrowband carrier receiving circuit first carries out mirror frequently in the receiving circuit (MC3361) of narrowband carrier, it is input to BPLC treater again and carries out demodulation, thus realize narrowband carrier communication.
The transmission circuit that BPLC receives and dispatches in circuit adopts general PA chip (PA chip adopts ISL1571), and receiving circuit adopts the multi-stage filter circuit of resistance, electric capacity and inductance composition.
Narrowband carrier adopts BFSK modulation system, and communication speed 50bps-600bps, adopts spread spectrum communication mode, adopts the expansion factor frequently of 80.
The receiving circuit of narrowband carrier adopts MC3361 chip, and the mirror being responsible for receiving frequency modulation signal is frequently.
For narrowband carrier communication, the sinusoidal wave signal of two kinds of different frequencies is produced: M0 (such as 138kHz) and M1 (such as 126kHz) by bandwidth carrier treater, two signal frequency differences are for being no more than 15KHz, the time every time sending M0 or M1 is set to τ (this time refers to the time that M0 or M1 continues), (τ≤10 microsecond), the mistake zero point of 220V sinusoidal ac is got by zero crossing circuitry, crossing zero point surrounding time t (t≤4 millisecond) the inner transmitting-receiving carrying out data, each is crossed zero point and sends 1bit valid data (valid data refer to 0 or 1).
Bandwidth carrier mode is first adopted to carry out the ammeter ' s reading meter of power distribution station, one take turns and checked meter after, add up the unsuccessful ammeter checked meter, order of checking meter issue rear certain time non-return data or return data mistake be unsuccessful checking meter, adopt narrowband carrier signalling methods that the unsuccessful ammeter checked meter is carried out benefit again to copy, until success ratio is 100%.
BPLC treater adopts the QCA7000 type chip of broadband power line carrier chip high pass.
Matching transformer in BPLC matching circuit requires that dispatch coil is separately, the former limit number of turn: send coil turn: the ratio of the receiving coil number of turn is 4: 1: 5.
Based on this bandwidth carrier treater, by the reception of the external narrowband carrier communication of general purpose I/O pin and transmission data, sending circuit and adopt discrete components and parts to overlap, receiving circuit adopts general FSK mirror chip frequently, increases the signal coupling circuit of bandwidth carrier chip simultaneously;
Bandwidth carrier sends circuit and adopts external PA mode, PA chip adopts ISL1571, receiving circuit is the multi-stage filter circuit of resistance, electric capacity and inductance composition, and matching transformer requires that dispatch coil is separately, and turn ratio is 4: 1: 5 (the former limit numbers of turn: send the number of turn: receive the number of turn).
Narrowband carrier adopts BFSK modulation system, communication speed 50bps-600bps, adopt spread spectrum communication mode, adopt the expansion factor frequently of 80, this kind of technology can greatly improve its immunity from interference, promotes its point-to-point communication distance, especially under situation is sunken cord on ground simultaneously, relative bandwidth carrier signalling methods, its communication distance has very big lifting. The chip that receives and demodulates of narrowband carrier adopts MC3361, sends and adopts discrete device to build, can promote performance on the one hand, can reduce whole communication system cost on the other hand.
The modulation and demodulation of the narrowband carrier of this communication system adopt software simulating in the ARM9 of bandwidth carrier chip, the sinusoidal wave signal (adopting internal processes analog sine wave signal to be existing mature technology) of two kinds of different frequencies is produced by the mode of software (internal processes), the signal that its medium frequency is high is designated as M0 (such as 138kHz), the signal that frequency is low is designated as M1 (such as 126kHz), two signal frequency differences are for being no more than 15KHz, for this narrow band communication system bandwidth, the time every time sending M0 or M1 is set to τ, generally it is no more than 10 microseconds, the mistake zero point of 220V sinusoidal ac is got by zero crossing circuitry, crossing certain time t (being no more than 4 milliseconds) the inner transmitting-receiving carrying out data before and after zero point, each is crossed zero point and sends 1bit.
This communication system is when data reading system, bandwidth carrier mode is first adopted to carry out the ammeter ' s reading meter of power distribution station, one take turns and copied after, add up the unsuccessful ammeter checked meter, order of checking meter issue rear certain time non-return data or return data mistake be unsuccessful checking meter, adopt narrowband carrier signalling methods to carry out benefit again to copy, until success ratio is 100%.
Compared with prior art, it is an advantage of the current invention that:
The Whole frequency band power-line carrier communication method of the present invention, combine the advantage of narrowband carrier communication distance, the slow point-to-point communication distance of signal attenuation, also combine the advantages such as the speed of bandwidth carrier communication is fast simultaneously, the perfect demand of checking meter solving whole platform district of energy, significantly improve the success ratio checked meter, test shows to make whole platform district success ratio of checking meter half an hour to reach 100%, can meet the success ratio of power information acquisition system and high efficiency demand.
In addition, the implementation cost of this scheme is low, increases narrow band communication circuit on the basis of original bandwidth carrier chip, and the modulation and demodulation of narrowband carrier communication are simulated by original bandwidth carrier chip, it is easy to implement, conceives ingenious, and have special effect, it is the key point place of the present invention.
The modulation and demodulation device of broadband power line carrier treater is built-in bandwidth carrier, adopt ARM9 kernel, run linux embedded OS, adopt the modulation system of OFDM, communication frequency 2-12MHz, physical layer maximum communication rate reaches 10Mbps, and additional bandwidth carrier transmitting-receiving circuit, the signal coupling circuit of this bandwidth carrier communication chip remains unchanged, it is achieved broadband power line carrier communication. There is following advantage in the present invention:
1, achieve the complementation that bandwidth carrier communication communicates with narrowband carrier, compare narrowband carrier, greatly improve communication speed, meet intelligent grid demand, compare bandwidth carrier, greatly improve point-to-point communication distance, the communication distance under particularly sunkening cord.
2, achieve and use software mode to achieve the modulation and demodulation of narrowband carrier in bandwidth carrier chip, the situation flexible configuration that the communication index of narrowband carrier communication can be more on-the-spot.
Accompanying drawing explanation
Fig. 1 is the general frame figure of Whole frequency band power-line carrier communication method;
Fig. 2 is data reading system schema;
Fig. 3 is that narrowband carrier signal sends schematic circuit;
Fig. 4 is narrowband carrier receiving circuit figure;
Fig. 5 is narrowband carrier matching circuit figure;
Fig. 6 is narrowband carrier zero crossing circuitry figure;
Fig. 7 is broadband carrier signal transmitting-receiving and matching circuit.
Embodiment
For the ease of understanding the present invention, hereafter in conjunction with Figure of description and preferred embodiment, invention herein will be done more comprehensively, described meticulously, but protection scope of the present invention will be not limited to specific embodiment.
Unless otherwise defined, it is identical that all technical terms hereinafter used understand implication usually with those skilled in the art. Technical term used herein is the object in order to describe specific embodiment, is not be intended to limit the scope of the invention.
Embodiment:
Such as Fig. 1, a kind of Whole frequency band power-line carrier communication method, using BPLC treater as the principal controller for data gathering; There are two acquisition channels and perform the transfer based on bandwidth carrier and the transfer based on narrow band transmission respectively; Every bar acquisition channel can work independently with image data;
These two acquisition channels are bandwidth carrier acquisition channel and narrowband carrier acquisition channel respectively;
BPLC refers to broadband power line carrier communication;
Bandwidth carrier acquisition channel comprises BPLC and receives and dispatches circuit and BPLC matching circuit; The broadband transmitting-receiving port of side and BPLC treater that BPLC receives and dispatches circuit is connected, and another side that BPLC receives and dispatches circuit is connected with power line by BPLC matching circuit;
Narrowband carrier acquisition channel comprises narrowband carrier and sends circuit, narrowband carrier receiving circuit, narrow band signal matching circuit and zero crossing circuitry;
Narrowband carrier sends circuit and narrowband carrier receiving circuit is all arranged between narrow band signal matching circuit and BPLC treater; Narrow band signal matching circuit is connected with power line; Narrowband carrier sends circuit and is connected with the pin of narrowband carrier receiving circuit with BPLC treater; Here pin comprises common General Purpose I/O pins, and I/O pin can as enable signal output terminal, and pin can also be DAC pin (i.e. the output terminal of the DAC that BPLC treater is inner integrated), by the output of DAC pin energy analog sine;
The input termination power line of zero crossing circuitry, the I/O port of the output termination BPLC treater of zero crossing circuitry;
Produce narrow band carrier modulation signal by BPLC treater and it is sent to narrowband carrier transmission circuit, and the narrowband carrier signal received by narrowband carrier receiving circuit first carries out mirror frequently in the receiving circuit (MC3361) of narrowband carrier, it is input to BPLC treater again and carries out demodulation, thus realize narrowband carrier communication.
The transmission circuit that BPLC receives and dispatches in circuit adopts general PA chip (PA chip adopts ISL1571), and receiving circuit adopts the multi-stage filter circuit of resistance, electric capacity and inductance composition.
Narrowband carrier adopts BFSK modulation system, and communication speed 50bps-600bps, adopts spread spectrum communication mode, adopts the expansion factor frequently of 80.
The receiving circuit of narrowband carrier adopts MC3361 chip, and the mirror being responsible for receiving frequency modulation signal is frequently.
For narrowband carrier communication, the sinusoidal wave signal of two kinds of different frequencies is produced: M0 (such as 138kHz) and M1 (such as 126kHz) by bandwidth carrier treater, two signal frequency differences are for being no more than 15KHz, the time every time sending M0 or M1 is set to τ (this time refers to the time that M0 or M1 continues), (τ≤10 microsecond), the mistake zero point of 220V sinusoidal ac is got by zero crossing circuitry, crossing zero point surrounding time t (t≤4 millisecond) the inner transmitting-receiving carrying out data, each is crossed zero point and sends 1bit valid data (valid data refer to 0 or 1).
See Fig. 2, when checking meter, bandwidth carrier mode is first adopted to carry out the ammeter ' s reading meter of power distribution station, one take turns and checked meter after, add up the unsuccessful ammeter checked meter, order of checking meter issue rear certain time non-return data or return data mistake be unsuccessful checking meter, then adopt narrowband carrier signalling methods that the unsuccessful ammeter checked meter is carried out benefit to copy, until success ratio is 100%.
BPLC treater adopts the QCA7000 type chip of broadband power line carrier chip high pass.
Matching transformer in BPLC matching circuit requires that dispatch coil is separately, the former limit number of turn: send coil turn: the ratio of the receiving coil number of turn is 4: 1: 5.
In Fig. 3, TX_EN is for sending enable signal, and DAC_OUT is carrier wave output signal, and TX_OUT is the output signal of the carrier wave after amplifying, and wherein TX_OUT, DAC_OUT are bandwidth carrier output signal of processor, and TX_OUT is the carrier wave signal outputting to matching circuit. The narrowband carrier signal of Fig. 3 sends circuit and adopts discrete components and parts to build, circuit by treater be the signal exported after multistage amplification and filtering, then by matching transformer, signal is launched.
For Fig. 4, the carrier wave signal being coupled by matching transformer, after carrying out mirror frequency by MC3361, is carried out demodulation to RISE3902 chip, then sends into the process of bandwidth carrier chip.
In Fig. 5, narrowband carrier signal matching circuit is made up of safety electric capacity, matching transformer, and the alternating-current of 50Hz is isolated by safety electric capacity. The carrier wave signal received from electrical network, by safety electric capacity, is coupled to secondary from the former limit of matching transformer, then enters MC3361 and carries out demodulation.
Fig. 6 is narrowband carrier zero crossing circuitry figure, and zero crossing circuitry is made up of electronic pressure and optocoupler, utilizes the break-make of optocoupler to produce square wave signal, is input to bandwidth carrier chip I/O pin and detects. Wherein ZERO is the zero passage signal being input to bandwidth carrier treater, and bandwidth carrier chip carries out the transmitting-receiving of narrowband carrier signal according to the level of this signal.
Such as Fig. 7, broadband carrier signal transmitting-receiving and matching circuit are by safety electric capacity, matching transformer, multi-stage filter circuit forms, safety electric capacity filters out the alternating-current of 50Hz, the carrier wave signal sent out by BPLC treater is coupled on forceful electric power circuit by matching transformer, the bandwidth carrier chip received on power line, by after safety electric capacity, after matching transformer, is input to the inner demodulation of bandwidth carrier process chip after multiple-stage filtering.
Bandwidth carrier chip circuit, embedding ARM9 kernel in bandwidth carrier chip, outside needs to meet program FLASH, crystal and reset circuit etc.
Effect illustrates:
Success ratio of checking meter the day of pure narrowband carrier could reach more than 98% at present when platform district circuit is relatively good! Bandwidth carrier can accomplish success ratio 100% of checking meter for 3 hours, but to the platform district sunken cord with existing, success ratio of checking meter day may be low to 40%.
By implementing this scheme, carry out pilot in multiple power distribution station, all can accomplish that half hour checks meter success ratio 100%, meet 100% remote bill control simultaneously.
Claims (8)
1. a Whole frequency band power-line carrier communication method, it is characterised in that, using BPLC treater as the principal controller for data gathering; There are two acquisition channels and perform the transfer based on bandwidth carrier and the transfer based on narrow band transmission respectively;
Every bar acquisition channel can work independently with image data;
These two acquisition channels are bandwidth carrier acquisition channel and narrowband carrier acquisition channel respectively;
BPLC refers to broadband power line carrier communication;
Bandwidth carrier acquisition channel comprises BPLC and receives and dispatches circuit and BPLC matching circuit; The broadband transmitting-receiving port of side and BPLC treater that BPLC receives and dispatches circuit is connected, and another side that BPLC receives and dispatches circuit is connected with power line by BPLC matching circuit;
Narrowband carrier acquisition channel comprises narrowband carrier and sends circuit, narrowband carrier receiving circuit, narrow band signal matching circuit and zero crossing circuitry;
The input termination power line of zero crossing circuitry, the I/O port of the output termination BPLC treater of zero crossing circuitry;
Produce narrow band carrier modulation signal by BPLC treater to be sent to narrowband carrier and send circuit, and the narrowband carrier signal received by narrowband carrier receiving circuit first carries out mirror frequently in the receiving circuit of narrowband carrier, then it is input to BPLC treater and carries out demodulation.
2. Whole frequency band power-line carrier communication method according to claim 1, it is characterised in that, the transmission circuit that BPLC receives and dispatches in circuit adopts general PA chip, and receiving circuit adopts the multi-stage filter circuit of resistance, electric capacity and inductance composition.
3. Whole frequency band power-line carrier communication method according to claim 1, it is characterised in that, narrowband carrier adopts BFSK modulation system, and communication speed 50bps-600bps, adopts spread spectrum communication mode.
4. Whole frequency band power-line carrier communication method according to claim 3, it is characterised in that, the receiving circuit of narrowband carrier adopts MC3361 chip, and the mirror being responsible for receiving frequency modulation signal is frequently.
5. Whole frequency band power-line carrier communication method according to claim 3, it is characterized in that, for narrowband carrier communication, the sinusoidal wave signal of two kinds of different frequencies is produced: M0 and M1 by bandwidth carrier treater, two signal frequency differences are for being no more than 15KHz, and the time every time sending M0 or M1 is set to τ, is got the mistake zero point of 220V sinusoidal ac by zero crossing circuitry, crossing the transmitting-receiving carrying out data in zero point surrounding time t, each is crossed zero point and sends 1bit valid data.
6. Whole frequency band power-line carrier communication method according to claim 1, it is characterized in that, bandwidth carrier mode is first adopted to carry out the ammeter ' s reading meter of power distribution station, one take turns and checked meter after, add up the unsuccessful ammeter checked meter, then adopt narrowband carrier signalling methods that the unsuccessful ammeter checked meter is carried out benefit to copy.
7. Whole frequency band power-line carrier communication method according to claim 1, it is characterised in that, BPLC treater adopts the QCA7000 type chip of broadband power line carrier chip high pass.
8. Whole frequency band power-line carrier communication method according to the arbitrary item of claim 1-7, it is characterised in that, the matching transformer in BPLC matching circuit requires that dispatch coil is separately, the former limit number of turn: send coil turn: the ratio of the receiving coil number of turn is 4: 1: 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610152998.6A CN105680908B (en) | 2016-03-17 | 2016-03-17 | A kind of Whole frequency band power-line carrier communication method |
| PCT/CN2016/081138 WO2017156837A1 (en) | 2016-03-17 | 2016-05-05 | Full-band power line carrier communication method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610152998.6A CN105680908B (en) | 2016-03-17 | 2016-03-17 | A kind of Whole frequency band power-line carrier communication method |
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| CN105680908A true CN105680908A (en) | 2016-06-15 |
| CN105680908B CN105680908B (en) | 2018-08-07 |
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| WO (1) | WO2017156837A1 (en) |
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| CN106781410A (en) * | 2016-12-15 | 2017-05-31 | 高格（天津）信息科技发展有限公司 | Data mining system for electric meter |
| CN106935022A (en) * | 2017-03-21 | 2017-07-07 | 广西盛洲电力科技有限公司 | A kind of wideband power carrier communication kilowatt meter reading-out system |
| CN108711278A (en) * | 2018-07-27 | 2018-10-26 | 深圳芯珑电子技术有限公司 | A kind of energy information concentrator |
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| CN101882369A (en) * | 2010-07-01 | 2010-11-10 | 福州亿力电力通信信息有限公司 | Remote real-time monitoring system for electric power system client side meter |
| CN202663396U (en) * | 2012-07-12 | 2013-01-09 | 成都博高科技有限责任公司 | Carrier wireless dual-mode module based on electric carrier system |
| CN103457636A (en) * | 2013-08-09 | 2013-12-18 | 国家电网公司 | Method and system for cross-frequency band power line carrier communication based on frequency recognition technology |
| CN103607218A (en) * | 2013-10-28 | 2014-02-26 | 国家电网公司 | Cross-frequency-band power-line carrier communication system and communication method thereof |
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| CN203931164U (en) * | 2014-05-12 | 2014-11-05 | 国家电网公司 | Community water, electricity, gas data collector based on BPLC |
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| CN106781410A (en) * | 2016-12-15 | 2017-05-31 | 高格（天津）信息科技发展有限公司 | Data mining system for electric meter |
| CN106935022A (en) * | 2017-03-21 | 2017-07-07 | 广西盛洲电力科技有限公司 | A kind of wideband power carrier communication kilowatt meter reading-out system |
| CN108711278A (en) * | 2018-07-27 | 2018-10-26 | 深圳芯珑电子技术有限公司 | A kind of energy information concentrator |
| CN110784207A (en) * | 2018-07-30 | 2020-02-11 | 北京飞利信信息安全技术有限公司 | Carrier communication jam-proof backward flow circuit |
Also Published As
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| WO2017156837A1 (en) | 2017-09-21 |
| CN105680908B (en) | 2018-08-07 |
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