CN104253631A - Double-channel power carrier communication system and communication method thereof - Google Patents
Double-channel power carrier communication system and communication method thereof Download PDFInfo
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Abstract
The invention discloses a double-channel power carrier communication system and a communication method thereof. The system comprises a microprocessing module, a transmission power amplifying circuit, a receiving and filtering circuit and a coupling circuit, wherein the output end of the microprocessing module is connected with the transmission power amplifying circuit, a signal is amplified and sent to a power line by the coupling circuit, the receiving and filtering circuit is connected with the coupling circuit to receive the signal from the power line, then the signal is filtered and sent to the microprocessing module, the receiving and filtering circuit comprises two paths of band pass filtering circuits, the microprocessing module is provided with two paths of signal receiving ends, and the signal receiving ends are correspondingly connected with the two paths of band pass filtering circuits to receive and process the signal. The communication system has the advantages that the burstiness on the pulse noise is realized, the channel with less noise influence can be automatically detected and selected for communication, and the influence by the pulse noise is effectively avoided.
Description
Technical field
The present invention relates to power carrier communication system, particularly a kind of binary channels power carrier communication system and the means of communication thereof.
Background technology
Electric line carrier communication (PLC) is distinctive, the basic communication modes of electric power system, and it refers to and utilizes existing power line, by carrier system, analog or digital signal is carried out the technology of transfer of data.Tap into scheme with power line as network, existing power distribution networks can be utilized to carry out communication, do not need rewiring, and power line network is widely distributed, tap into conveniently, therefore, PLC technology has advantageous windward, and it also becomes one of technology of most competitiveness in Smart Home.
But, low-voltage power line is not be used for transmission communication data specially, its topological structure and physical characteristic all with traditional communication transfer medium, as differences such as twisted-pair feeder, coaxial cable, optical fiber, its characteristic of channel when transmission communication signal is quite complicated, there is the problems such as load is many, noise jamming is strong, fading channel is large, channel time delay, communication environment is quite severe.Interference source on power circuit comprises impulsive noise and self-sustained oscillation wave interference noise, and both operating frequencies are between 50kHz ~ 300kHz, and these frequencies are just in time the frequency ranges of most of carrier signal, and the proportion thus shared by this interference is also higher.We have done great many of experiments to different geographical (city, Industrial Area, rural area) respectively, and conclusion is the noise that can overcome power line with Time-varying Linear Systems filter circuit during interference noise as the Basic Reference Model of low-voltage power line.
Other noise produced in low-voltage power line is more stable on carrier communication system impact, and impulsive noise can produce on communication system the high bit-error that sudden impact causes moment, even causes communicating interrupt.In these two kinds of noises, to carrier communication system generation major effect is impulsive noise, by finding out the analysis of LV-PLC channel transmission characteristic above, the objective environment of low voltage power line carrier communication is very severe, reach the effect of stable communication, advanced technological means must be adopted to overcome impulsive noise.
Summary of the invention
For solving the problem, the object of the present invention is to provide a kind of binary channels power carrier communication system, automatically can detect interchannel noise and Received signal strength amplitude in Received signal strength process, select more excellent channel to carry out communication, improve the quality and reliability of communication.
The present invention solves the technical scheme that its problem adopts:
A kind of binary channels power carrier communication system, comprise micro treatment module, transmitting power amplifying circuit, wave reception filtering circuit and coupling circuit, micro treatment module exports and connects transmitting power amplifying circuit, signal is sent on power circuit by coupling circuit after amplifying, wave reception filtering circuit receives the signal from power circuit by butt coupling circuit, micro treatment module is sent to after filtering, wave reception filtering circuit comprises two-way bandwidth-limited circuit, described micro treatment module is provided with two paths of signals receiving terminal, the corresponding two-way bandwidth-limited circuit Received signal strength that connects processes, for impulsive noise, there is paroxysmal feature, automatically can detect and select the less channel of noise effect to carry out communication, effectively avoid the impact of impulsive noise.
Preferably, the centre frequency that described two-way bandwidth-limited circuit is arranged is not identical, and be respectively 281KHz and 122KHz, frequency range is worth centered by centre frequency, and detection range can cover between 50kHz-300kHz substantially.
More preferably; described wave reception filtering circuit is also provided with the transient supression diode for lightning protection; when voltage high pressure is higher than 30V; it can make its impedance suddenly reduce with high speed; simultaneously stability big current; voltage clamp between its two ends is numerically predetermined at one, thus guarantee that circuit element below damages from the high-octane impact of transient state.
In technique scheme, described micro treatment module is power line carrier communication chip, its inside is integrated with single-chip microcomputer and Power Line Carrier Communication Module, and described single-chip microcomputer outputed signal and received two-way bandwidth-limited circuit signal by carrier communication module is sent to single-chip microcomputer process.
Improvement in technique scheme, has WatchDog Timer and low-voltage reset circuit in going back, can provide two kinds of low-power consumption battery saving modes, reach the performance of high reliability and low-power consumption in described micro treatment module.
A kind of means of communication of binary channels power carrier communication system:
Power carrier communication system initialization, sets the initial channel coefficient of two-way bandwidth-limited circuit respectively, enters work, comprises signal and sends and receive two processes,
Signal process of transmitting: by micro treatment module outgoing carrier signal, amplifies through transmitting power amplifying circuit, delivers on power circuit transmit finally by coupling circuit;
Signal reception process: coupling circuit receives the signal on power circuit, wave reception filtering circuit divides two paths to receive the Received signal strength of different frequency scope, micro treatment module divides two paths to receive the filtering signal of wave reception filtering circuit, interchannel noise on the passage of two-way bandwidth-limited circuit each Autonomous test place and Received signal strength amplitude, when place Air conduct measurement has Received signal strength, the Received signal strength amplitude reading this passage exports, otherwise the interchannel noise reading this passage exports;
Then micro treatment module calculates respective channel coefficients and initial channel index contrast according to the output of two passages, and the good a-road-through road of selective channel coefficient carries out communication.
In the above-mentioned means of communication, preferably, the initial channel coefficient of two-way bandwidth-limited circuit is all set as 100.
In the above-mentioned means of communication, when described micro treatment module sends signal, the step that settling signal modulation successively, digital signal revolving die analog signal, filtering and signal gain are amplified exports.
In the above-mentioned means of communication, during described micro treatment module Received signal strength, complete selector channel input successively, step that signal gain amplification, filtering, analog signal turn digital signal and signal receiving carries out input processing.
The invention has the beneficial effects as follows:
A kind of binary channels power carrier communication system that the present invention adopts and the means of communication thereof, micro treatment module sends signal and is sent on power circuit after transmitting power amplifying circuit and coupling circuit process and transmits, the signal that coupling circuit receives on power circuit simultaneously sends wave reception filtering circuit to, Received signal strength delivers to micro treatment module after binary channels filtering, automatically can detect and select the less channel of noise effect to carry out communication, effectively avoid the impact of impulsive noise, the quality and reliability of raising system, effectively can improve efficiency and the quality of communication simultaneously, reduce the error rate, avoid the appearance of communicating interrupt.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the invention will be further described.
Fig. 1 is the theory diagram of binary channels power carrier communication system of the present invention;
Fig. 2 is the circuit theory diagrams of micro treatment module in the present invention;
Fig. 3 is the circuit theory diagrams of transmitting power amplifying circuit in the present invention;
Fig. 4 is the circuit theory diagrams of coupling circuit in the present invention;
Fig. 5 is the circuit theory diagrams of wave reception filtering circuit in the present invention;
Fig. 6 is the logic diagram of Received signal strength process in the means of communication of the present invention.
Embodiment
With reference to Fig. 1, a kind of binary channels power carrier communication system provided by the invention, comprise micro treatment module 1, transmitting power amplifying circuit 2, wave reception filtering circuit 4 and coupling circuit 3, micro treatment module 1 exports connection transmitting power amplifying circuit 2 and coupling circuit 3 successively and is responsible for transmitting a signal on power circuit, coupling circuit 3 is connected with wave reception filtering circuit 4 to be responsible for receiving the signal come from power circuit and being sent to micro treatment module 1, wave reception filtering circuit 4 comprises two-way bandwidth-limited circuit, micro treatment module 1 is provided with two paths of signals receiving terminal, corresponding connection two-way bandwidth-limited circuit Received signal strength.
Preferably, the micro treatment module 1 adopted in the present embodiment is the power line carrier communication chip of a high integration, be preferably power carrier chip SH99F01, its inside is integrated with the compatible single-chip microcomputer of high speed enhancement mode 8051 and high-performance electric powerline carrier communication module (Powerline Transceiver is called for short PLT).SH99F01 built-in PLT modular design is fully integrated power line carrier communication engine, built-in analog front circuit and modulation-demodulation circuit, peripheral circuit is succinct, support high performance spread spectrum carrier communication technology and the narrowband modulation communication technology, support zero passage is transmitted, and has initiated carrier wave dual mode communication technology, in conjunction with advanced forward error correction code decode algorithm, at utmost can improve carrier wave physical layer communication ability, adapt to various low voltage power line communication channel environment.SH99F01 has most of characteristic of standard 8051 chip.In addition, SH99F01 is also integrated with 512 byte RAM and 10 ADC.In order to reach high reliability and low-power consumption, SH99F01 is built-in WatchDog Timer, low-voltage reset circuit, and provide 2 kinds of low-power consumption battery saving modes.
With reference to shown in Fig. 2 to Fig. 5, concrete load mode is, when the PLT of micro treatment module 1 will send data, data deliver to DSP by internal data bus, DSP modulates according to specific algorithm settling signal, and then digital signal converts analog signal to by DAC, then device filtering after filtering, variable gain amplifier amplifies, and is finally exported by 26 pin of micro treatment module 1.
26 pin of micro treatment module 1 are connected with the resistance R19 of transmitting power amplifying circuit 2, carrier signal inputs to triode Q2 by resistance R19, triode Q2 and peripheral circuit composition voltage amplifier, the signal after amplification delivers to the base stage of triode Q3 by the collector electrode of triode Q2.Triode Q1, triode Q3 and peripheral circuit composition power amplifier, the signal after amplification outputs to coupling circuit 3 through electric capacity C34.
Coupling circuit 3 connects electric capacity C34, and the carrier signal that send delivers to elementary 3 pin of T1,4 elementary pin ground connection, forms loop.T1 is a transformer, and complete electrical isolation function, carrier signal, from the secondary output of T1, is coupled on power line through electric capacity C1, realizes signal and sends.In said structure, piezo-resistance RAV1 plays the effects such as overvoltage protection, lightning protection, surge current suppression, absorbing peak pulse, amplitude limit, high pressure arc extinguishing, de-noising.
Preferably, wave reception filtering circuit 4 comprises transient supression diode D21 and two-way bandwidth-limited circuit, and in the present embodiment, two-way bandwidth-limited circuit is respectively filter circuit A and filter circuit B.Diode D21 is a transient supression diode, and when voltage high pressure is higher than 30V, it (can be up to 1*10 with high speed
-12second) its impedance is reduced suddenly, simultaneously stability big current, the voltage clamp between its two ends is numerically predetermined at one, thus guarantee that circuit element below damages from the high-octane impact of transient state.Filter circuit A comprises resistance R25, electric capacity C33 and C30, inductance L 2 and L1, diode D12 and D13.C33 and C30 adopts high Q electric capacity, L2 and L1 adopts high Q wire-wound inductance, improves the selectivity of filter circuit, diode D12 and D13 reverse parallel connection, plays double limiting function, protection micro treatment module 1.Filter circuit B is identical with the principle of filter circuit A, and only centre frequency is different.Filter circuit A centre frequency is arranged on 281KHz, and B centre frequency is arranged on 122KHz, and detection range can be made substantially to cover between 50kHz-300kHz.
Micro treatment module 1 is provided with two paths of signals receiving terminal, be respectively 20 pin and 24 pin, the filtering signal of two-way bandwidth-limited circuit is delivered to respectively on corresponding pin, select one of them passage as communication channel by chip internal, then amplify through low noise automatic gain amplifier, improve receiving signal sensitivity and dynamic range, then device filtering after filtering, improve signal-selectivity.Signal delivers to ADC conversion further, and be transformed to digital signal by analog signal, then DSP is according to the demodulation of specific algorithm settling signal, and DSP data give single-chip microcomputer process by internal data bus.
The binary channels communication mode that the present invention adopts, for impulsive noise, there is paroxysmal feature, automatically can detect and select the less channel of noise effect to carry out communication, effectively avoid the impact of impulsive noise, the quality and reliability of raising system, effectively can improve efficiency and the quality of communication simultaneously, reduce the error rate, avoid the appearance of communicating interrupt.These processing procedures complete at chip internal entirely, save peripheral circuit size and cost.
With reference to Fig. 6, a kind of means of communication designed based on above-mentioned binary channels power carrier communication system, this means of communication step is as follows: first, power carrier communication system initialization, set the initial channel coefficient of two-way bandwidth-limited circuit respectively, then enter work, this communication process comprises transmission signal and Received signal strength two parts.
Transmission signal process is: by micro treatment module 1 outgoing carrier signal, amplify through transmitting power amplifying circuit 2, delivers on power circuit transmit finally by coupling circuit 3;
Acknowledge(ment) signal process is: received the signal on power circuit by coupling circuit 3, wave reception filtering circuit 4 points of two paths receive the Received signal strength of different frequency scope, the present embodiment divides into filter circuit A and filter circuit B, interchannel noise on the passage of two-way bandwidth-limited circuit each Autonomous test place and Received signal strength amplitude, first filter circuit A enters work, when place Air conduct measurement has Received signal strength, the Received signal strength amplitude reading this passage exports, otherwise the interchannel noise reading this passage exports; Then detect place passage by filter circuit B, perform same step and export.
Micro treatment module 1 receives the filtering signal of two paths, and then micro treatment module 1 calculates respective channel coefficients and initial channel index contrast according to the output of two passages, judges the quality of channel, and the good a-road-through road of selective channel coefficient carries out communication.
In the above-mentioned means of communication, preferably, the initial channel coefficient of two-way bandwidth-limited circuit is all set as 100.When micro treatment module 1 sends signal, the step that settling signal modulation successively, digital signal revolving die analog signal, filtering and signal gain are amplified exports.During micro treatment module 1 Received signal strength, complete selector channel input successively, step that signal gain amplification, filtering, analog signal turn digital signal and signal receiving carries out input processing, these means of communication effectively improve efficiency and the quality of communication, reduce the error rate, avoid the appearance of communicating interrupt.
The above, just preferred embodiment of the present invention, the present invention is not limited to above-mentioned execution mode, as long as it reaches technique effect of the present invention with identical means, all should belong to protection scope of the present invention.
Claims (10)
1. a binary channels power carrier communication system, comprises micro treatment module, transmitting power amplifying circuit, wave reception filtering circuit and coupling circuit,
Micro treatment module exports and connects transmitting power amplifying circuit, signal is sent on power circuit by coupling circuit after amplifying, wave reception filtering circuit receives the signal from power circuit by butt coupling circuit, is sent to micro treatment module, it is characterized in that after filtering:
Wave reception filtering circuit comprises two-way bandwidth-limited circuit, and described micro treatment module is provided with two paths of signals receiving terminal, corresponding connection two-way bandwidth-limited circuit Received signal strength.
2. a kind of binary channels power carrier communication system according to claim 1, is characterized in that: the centre frequency that described two-way bandwidth-limited circuit is arranged is not identical.
3. a kind of binary channels power carrier communication system according to claim 2, is characterized in that: the centre frequency of described two-way bandwidth-limited circuit is respectively 281KHz and 122KHz.
4., according to the arbitrary described a kind of binary channels power carrier communication system of claims 1 to 3, it is characterized in that: described wave reception filtering circuit is also provided with the transient supression diode for lightning protection.
5. a kind of binary channels power carrier communication system according to claim 1, it is characterized in that: described micro treatment module is power line carrier communication chip, its inside is integrated with single-chip microcomputer and Power Line Carrier Communication Module, and described single-chip microcomputer is outputed signal by carrier communication module and receives the signal of two-way bandwidth-limited circuit.
6. a kind of binary channels power carrier communication system according to claim 5, is characterized in that: have WatchDog Timer and low-voltage reset circuit in going back in described micro treatment module.
7. the means of communication of a binary channels power carrier communication system as claimed in claim 1:
Power carrier communication system initialization, sets the initial channel coefficient of two-way bandwidth-limited circuit respectively, enters work, comprises signal and sends and receive two processes,
Signal process of transmitting: by micro treatment module outgoing carrier signal, amplifies through transmitting power amplifying circuit, delivers on power circuit transmit finally by coupling circuit;
Signal reception process: coupling circuit receives the signal on power circuit, wave reception filtering circuit divides two paths to receive the Received signal strength of different frequency scope, micro treatment module divides two paths to receive the filtering signal of wave reception filtering circuit, interchannel noise on the passage of two-way bandwidth-limited circuit each Autonomous test place and Received signal strength amplitude, when place Air conduct measurement has Received signal strength, the Received signal strength amplitude reading this passage exports, otherwise the interchannel noise reading this passage exports;
Then micro treatment module calculates respective channel coefficients and initial channel index contrast according to the output of two passages, and the good a-road-through road of selective channel coefficient carries out communication.
8. the means of communication according to claim 7, is characterized in that: the initial channel coefficient of two-way bandwidth-limited circuit is all set as 100.
9. the means of communication according to claim 7, is characterized in that: when described micro treatment module sends signal, and the step that settling signal modulation successively, digital signal revolving die analog signal, filtering and signal gain are amplified exports.
10. the means of communication according to claim 7, is characterized in that: during described micro treatment module Received signal strength, complete selector channel input successively, step that signal gain amplification, filtering, analog signal turn digital signal and signal receiving carries out input processing.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105141281A (en) * | 2015-08-05 | 2015-12-09 | 成都君禾天成科技有限公司 | Receiving filtering circuit employing power carrier communication |
| CN105933079A (en) * | 2016-06-01 | 2016-09-07 | 国网河北省电力公司电力科学研究院 | Detection system and detection method for communication performance of carrier signals with different frequencies |
| CN106325084A (en) * | 2015-06-25 | 2017-01-11 | 中兴通讯股份有限公司 | Intelligent home central controller, terminal, system and control method |
| CN108731193A (en) * | 2018-03-02 | 2018-11-02 | 珠海格力电器股份有限公司 | Communication implementation method and device of air conditioning unit, storage medium and processor |
| DE102017212594A1 (en) | 2017-07-21 | 2019-01-24 | Robert Bosch Gmbh | Method for noise suppression in a battery, noise suppression device and battery |
| CN109525202A (en) * | 2018-11-30 | 2019-03-26 | 国网河南省电力公司信息通信公司 | One kind being based on big data power grid security management information system |
| CN109677447A (en) * | 2018-12-24 | 2019-04-26 | 卡斯柯信号有限公司 | It is a kind of to multiply the two multi-standard track signal acquisition systems for taking two frameworks based on two |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1117591A (en) * | 1997-06-26 | 1999-01-22 | Nippon Denki Ido Tsushin Kk | Electric power-line carrier communication device |
| CN102118184A (en) * | 2009-12-30 | 2011-07-06 | 比亚迪股份有限公司 | Device and method for power line carrier communication |
| CN103023533A (en) * | 2012-11-27 | 2013-04-03 | 祝文闻 | Communication method and communication device for dual-frequency power line carrier |
| CN203135872U (en) * | 2013-02-05 | 2013-08-14 | 北京中宸泓昌科技有限公司 | Electric-power carrier-wave communication chip apparatus |
-
2014
- 2014-05-23 CN CN201410223235.7A patent/CN104253631B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1117591A (en) * | 1997-06-26 | 1999-01-22 | Nippon Denki Ido Tsushin Kk | Electric power-line carrier communication device |
| CN102118184A (en) * | 2009-12-30 | 2011-07-06 | 比亚迪股份有限公司 | Device and method for power line carrier communication |
| CN103023533A (en) * | 2012-11-27 | 2013-04-03 | 祝文闻 | Communication method and communication device for dual-frequency power line carrier |
| CN203135872U (en) * | 2013-02-05 | 2013-08-14 | 北京中宸泓昌科技有限公司 | Electric-power carrier-wave communication chip apparatus |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106325084A (en) * | 2015-06-25 | 2017-01-11 | 中兴通讯股份有限公司 | Intelligent home central controller, terminal, system and control method |
| CN105141281A (en) * | 2015-08-05 | 2015-12-09 | 成都君禾天成科技有限公司 | Receiving filtering circuit employing power carrier communication |
| CN105933079A (en) * | 2016-06-01 | 2016-09-07 | 国网河北省电力公司电力科学研究院 | Detection system and detection method for communication performance of carrier signals with different frequencies |
| DE102017212594A1 (en) | 2017-07-21 | 2019-01-24 | Robert Bosch Gmbh | Method for noise suppression in a battery, noise suppression device and battery |
| CN108731193A (en) * | 2018-03-02 | 2018-11-02 | 珠海格力电器股份有限公司 | Communication implementation method and device of air conditioning unit, storage medium and processor |
| EP3734174A4 (en) * | 2018-03-02 | 2021-03-24 | Gree Electric Appliances, Inc. of Zhuhai | Communication implementation method and device for air conditioning unit, storage medium and processor |
| US11609012B2 (en) | 2018-03-02 | 2023-03-21 | Gree Electric Appliances, Inc. Of Zhuhai | Communication implementation method and device for air conditioning units, non-transitory computer readable storage medium and processor |
| CN109525202A (en) * | 2018-11-30 | 2019-03-26 | 国网河南省电力公司信息通信公司 | One kind being based on big data power grid security management information system |
| CN109525202B (en) * | 2018-11-30 | 2022-09-23 | 国网河南省电力公司信息通信公司 | Big data-based power grid safety management information system |
| CN109677447A (en) * | 2018-12-24 | 2019-04-26 | 卡斯柯信号有限公司 | It is a kind of to multiply the two multi-standard track signal acquisition systems for taking two frameworks based on two |
| CN109677447B (en) * | 2018-12-24 | 2024-03-29 | 卡斯柯信号有限公司 | Multi-system track signal acquisition system based on two-by-two-out-of-two architecture |
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