CN203243325U - Carrier communication system based on dynamic characteristics of power line network impedance - Google Patents
Carrier communication system based on dynamic characteristics of power line network impedance Download PDFInfo
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- CN203243325U CN203243325U CN 201320156210 CN201320156210U CN203243325U CN 203243325 U CN203243325 U CN 203243325U CN 201320156210 CN201320156210 CN 201320156210 CN 201320156210 U CN201320156210 U CN 201320156210U CN 203243325 U CN203243325 U CN 203243325U
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Abstract
The utility model relates to a carrier communication system based on the dynamic characteristics of a power line network impedance. The carrier communication system comprises a concentrator and a plurality of carrier terminals, wherein the concentrator is connected with the plurality of carrier terminals via a primary route or a secondary route; each carrier terminal comprises a transmission circuit unit and a reception circuit unit; the transmission circuit unit comprises a power amplification and impedance adjustment circuit, a modulation digital-to-analogue conversion and pre-amplification circuit; the reception circuit unit comprises a pre-amplification and filter circuit, a demodulation and analogue-to-digital conversion circuit; and each carrier terminal further comprises a DSP (digital signal processor) and CPU (central processing unit) circuit unit, and an isolation coupling and protection unit. According to the carrier communication system disclosed by the utility model, the highest actual transmission energy of a transmission signal and the optimal communication route are guaranteed, and the fewest stages of direct sequence spread spectrum during actual communication are realized, thus greatly increasing the success rate of one-time carrier communication, and increasing the communication speed.
Description
Technical field
The utility model relates to the power line carrier communication field, specifically a kind of carrier communication system based on power line network impedance dynamic characteristic.
Background technology
In recent years intelligent grid fast development, more and more stronger to the requirement real-time, two-way communication between Utilities Electric Co. and each terminal use.Carrier communication based on low-voltage power line is elected as main communication mode by Utilities Electric Co. because design and running is with low cost.Yet present whole power-line carrier communication level there is no method reaches real-time, reliable, the two-way communication of supporting between Utilities Electric Co. and terminal use.This mainly is because the major function of electrical network is transmission power frequency electric flux, low-voltage power line network topology structure complex, the power line network impedance is very obvious with the variations such as switching of communication frequency, distance and user load, this affects actual emission power and the received signal strength of signal so that the carrier communication signal exists complicated reflection and transmission phenomenon in transmission course; Many power consumption equipments have in use produced various electromagnetic interference in addition, again so that further impact is received in effective reception of carrier signal.
All multi-experts and scholar have carried out a lot of researchs and improvement in this field, mainly comprise:
By the narrowband carrier communication mode being carried out direct sequence spread spectrum [such as CN102832963A], but effective attenuation receiver side non-correlation interference noise, but transmission speed is reduced greatly.And transmitting and receiving problem for the signal that impedance mismatch causes, spread spectrum can't solve.
Adopt multi-carrier communication technology [such as 102835181A], namely signal sends by multichannel carrier frequency separate modulation, and when the signal of certain channel can't be received, other channel can use.But it is not only high to transmitting and receiving circuit requirement, and is also large to the requirement of transmitting power, and the spectrum space utilance is also very low; Its electromagnetic interference capability such as antagonism white noise etc. is limited in addition.And as on this basis to each carrier frequency stack spread spectrum, then not only very large to occupying of frequency band, the scheme cost is also higher.Adopt orthogonal frequency division technology (OFDM), namely each carrier phase is mutually orthogonal on the basis of multicarrier, and frequency spectrum can overlap each other; Not only reduce each subcarrier phase mutual interference after the modulation like this, and improved the availability of frequency spectrum.But the challenge of finding in multicarrier also can't obtain fine solution here.
Patent CN102621386A discloses to utilize the impedance operator of electrical network has been carried out all kinds of measurements and analysis, and the assessment result of utilizing network impedance is optimized networking and the routing algorithm of carrier communication network; But owing to the switching of power line network impedance along with power consumption equipment changes, this type of static routing networking diagram can't the simulated field actual state, also can't guarantee on-the-spot real time communication success rate.
The utility model content
The purpose of this utility model is to provide a kind of carrier communication system and method based on power line network impedance dynamic characteristic, by detection of dynamic and the real-time matching to the impedance of power line carrier transmitting-receiving meshed network, and the intelligent optimization of network routing topology, improve carrier communication one-time success rate and communication speed, actual occupation rate to communication band is low simultaneously, transmit and receive circuit simpler, transmitting power is less.
The technical solution adopted in the utility model is:
A kind of carrier communication system based on power line network impedance dynamic characteristic; comprise concentrator and a plurality of carrier terminal; described concentrator is connected with a plurality of carrier terminals by low-voltage power line; described carrier terminal comprises transtation mission circuit unit and receiving circuit unit; described transtation mission circuit unit comprises power amplification and impedance adjustment circuit; modulation digital-to-analogue conversion and pre-amplifying circuit; described receiving circuit unit comprises pre-amplification and filter circuit; demodulation and analog to digital conversion circuit; described carrier terminal also comprises DSP and cpu circuit unit; isolation coupling and protected location, described DSP and cpu circuit unit are to transtation mission circuit unit and receiving circuit unit Synchronization Control.
The power amplification of described transtation mission circuit unit and impedance adjustment circuit comprise three identical control units, wherein first control unit comprises: resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, capacitor C 11, capacitor C 12, diode D11, diode D12, triode Q11, triode Q12, triode Q13 and triode Q14, the base stage of Vin-r connecting triode Q11, Vin-r and resistance R 11 are all by resistance R 12 ground connection, Vdr-r is by the base stage of resistance R 11 connecting triode Q11, Vdr-r is by the collector electrode of resistance R 13 difference connecting triode Q11 and the base stage of triode Q12, the emitter of triode Q11 connects capacitor C 11 by resistance R 14, capacitor C 11 ground connection, the emitter of triode Q11 is by the emitter of resistance R 15 connecting triode Q14, the emitter of triode Q14 and inter-collector are connected with diode D12, the grounded collector of triode Q14, the collector electrode of Vcc-p connecting triode Q13, the emitter of triode Q13 and inter-collector are connected with diode D11, the emitter of triode Q13 is connected with the emitter of resistance R 15 and triode Q14, the emitter of Vdr-r connecting triode Q12, the base stage of triode Q12 and inter-collector are connected with capacitor C 12, the base stage of the collector electrode connecting triode Q13 of triode Q12, the collector electrode of triode Q12 are successively by diode D13, resistance R 16 ground connection.
A kind of carrier communication method based on power line network impedance dynamic characteristic in a carrier communication local area network (LAN), is selected several carrier communication frequency channels, regularly sends route topological by concentrator and optimizes instruction; Each communication node carrier terminal adopts the direct sequence spread spectrum technology to send test massage by previously selected each carrier frequency successively, detect simultaneously the signal strength signal intensity that reflects at same transmit network Nodes, DSP and CPU element utilize sending and receiving to signal strength signal intensity and phase difference the network equivalent impedance under each frequency of this transmitting node is calculated; And be in the signal strength signal intensity that each tranmitting frequency of launch terminal was intercepted and recorded to other carrier terminal in the same LAN, and writing time simultaneously;
After each took turns the route test, each carrier terminal was by from big to small order arrangement of its launch point line impedance tranmitting frequency; According to frequency and the intensity of the return signal that listens to, select three communication objects and three optimum traffic frequencies simultaneously; Then each carrier terminal is used selected communication frequency successively, adjust equivalence emission impedance by Vin-r, Vin-l and Vin-c, to its communication object property verified two-way communication, maximum three the optimal communication objects of locking after the two-way communication success, reach corresponding tranmitting frequency, emission impedance and receive frequency, and the result is beamed back concentrator;
By counting the network routing study of wheel, a best route topological database just builds up, and it is containing markers, and three optimal communication objects of each communication node reach three selected optimum transmitting frequencies and launch output impedance, and three optimum reception frequencies; Each node is intercepted other nodal terminal in the not busy remaining time of communication and is signaled, basis signal intensity, and the decision network impedance variation, the real-time update communication object, thereby so that the optimal communication network topological diagram obtains dynamic optimization;
Concentrator and each node communication terminal are carried out intercommunication in real time according to best route topological figure; Each carrier terminal is switchover intercepting between specified receive frequency, after receiving signal and accepting, to specified route terminal, by best tranmitting frequency adjustment emission output impedance, and carries out the signal transmission.Reactionless such as communication object, then select the suboptimum frequency to carry out repetitive operation; So object is reactionless all the time, then selects the hypo-optimal route object to repeat said process.
The utility model carries out Synchronization Control to transtation mission circuit and receiving circuit in the power line carrier communication circuit, so that sending and receiving signal parallel bi-directional; When signal sends, by specific circuit the actual signal strength signal intensity that sends to electrical network is measured and analyzed, and then determine in real time to send the network impedance of point; Then according to the network impedance matching theory, dynamically adjust the output impedance of transtation mission circuit, maximum to guarantee the actual signal energy that sends.
Aspect carrier networking and route, use termly several selected carrier frequencies respectively network organizing route topological figure to be carried out dynamic optimization.By the mutual sending and receiving test signal of each nodal terminal communication module, according to the signal frequency and the intensity that receive, evade network standing wave point and strong jamming zone, confirm optimal communication object and uplink and downlink communication frequency.The information of uploading in concentrator is marked on when comprising according to each node carrier terminal of receiving, route optimization networking topological database, dynamically adjust the uplink and downlink communication frequency of routed path and every a pair of node, thereby so that intrasystem communication always undertaken by the network path of optimum.
Power amplification of the present utility model and impedance adjustment circuit are comprised of three identical control units.In first control unit, after amplifying through shaping and middle rank, carrier wave transmitted signal Vin-r by push-pull power amplifier triode Q13 and Q14 pipe and a series connection power resistor R0 are sent to Coupling point V-pl.Vcc-p provides direct current to power discharging transistor Q13 and Q14; Vdr-r is that front stage circuits supplies direct current, and Vdr-r just powers when only having use, is in high-impedance state to guarantee pliotron when not driving.Second same circuit of control unit utilization sends to same Coupling point V-pl with another carrier wave transmitted signal Vin-l by a series connection inductance L 0; The 3rd circuit that the control unit utilization is same sends to same Coupling point V-pl with Third Road carrier wave transmitted signal Vin-c by a series connection capacitor C 0.By signal amplitude and the phase place of control transmitted signal Vin-r, Vin-l and Vin-c, capable of dynamic is regulated signal strength signal intensity and the equivalent output impedance of Coupling point V-pl.
The beneficial effects of the utility model are by above-mentioned design optimization, each node communication terminal capable of dynamic in the power-line carrier communication system is determined its optimal communication object and corresponding sending and receiving communication frequency, and the output matching impedance of radiating circuit, guaranteed that transmitted signal actual transmissions energy is maximum, communication path is best, also so that the progression of the direct sequence spread spectrum during practical communication can be used minimum, thereby both improved widely the carrier wave success rate of once communicating by letter, improved again communication speed.
Another advantage of the present utility model is the actual occupation rate of frequency band low, transmits and receives circuit simpler, and transmitting power is less.
Description of drawings
Fig. 1. carrier communication termination function and circuit module block diagram.
Fig. 2. power amplification and impedance adjustment circuit figure.
Fig. 3. carrier communication terminal emission impedance detection functional flow diagram.
Fig. 4. the best route topological figure of low pressure local area network (LAN) carrier wave.
Fig. 5. according to the dynamic routing networking flow chart of power line network impedance operator.
Fig. 6. carrier communication and autonomous dynamic optimization route topological structure flow chart.
Wherein: 1, concentrator, 2, carrier terminal, 3, the transtation mission circuit unit; 4, receiving circuit unit; 5, power amplification and impedance adjustment circuit, 6, modulation digital-to-analogue conversion and pre-amplifying circuit, 7, amplify and filter circuit in advance; 8, demodulation and analog to digital conversion circuit; 9, DSP and cpu circuit unit, 10, isolation coupling and protected location, 11, control unit; 12, main road is by route, and 13, secondary route route.
Embodiment
Such as Fig. 1; shown in 2 and 4; carrier communication system based on power line network impedance dynamic characteristic of the present utility model; comprise concentrator 1 and a plurality of carrier terminal 2; concentrator 1 is connected with a plurality of carrier terminals 2 by low-voltage power line; low-voltage power line comprises that main road is by route 12 and/or secondary route route 13; carrier terminal 2 comprises transtation mission circuit unit 3 and receiving circuit unit 4; transtation mission circuit unit 3 comprises power amplification and impedance adjustment circuit 5; modulation digital-to-analogue conversion and pre-amplifying circuit 6; receiving circuit unit 4 comprises pre-amplification and filter circuit 7; demodulation and analog to digital conversion circuit 8; carrier terminal 2 also comprises DSP and cpu circuit unit 9; isolation coupling and protected location 10; the 9 pairs of transtation mission circuit unit 3 in DSP and cpu circuit unit and receiving circuit unit 4 Synchronization Control, but parallel processing sending and receiving signal.
The power amplification of the utility model transtation mission circuit unit 3 and impedance adjustment circuit 5 comprise three identical control units 11, wherein first control unit comprises: resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, capacitor C 11, capacitor C 12, diode D11, diode D12, triode Q11, triode Q12, triode Q13 and triode Q14, the base stage of Vin-r connecting triode Q11, Vin-r and resistance R 11 are all by resistance R 12 ground connection, Vdr-r is by the base stage of resistance R 11 connecting triode Q11, Vdr-r is by the collector electrode of resistance R 13 difference connecting triode Q11 and the base stage of triode Q12, the emitter of triode Q11 connects capacitor C 11 by resistance R 14, capacitor C 11 ground connection, the emitter of triode Q11 is by the emitter of resistance R 15 connecting triode Q14, the emitter of triode Q14 and inter-collector are connected with diode D12, the grounded collector of triode Q14, the collector electrode of Vcc-p connecting triode Q13, the emitter of triode Q13 and inter-collector are connected with diode D11, the emitter of triode Q13 is connected with the emitter of resistance R 15 and triode Q14, the emitter of Vdr-r connecting triode Q12, the base stage of triode Q12 and inter-collector are connected with capacitor C 12, the base stage of the collector electrode connecting triode Q13 of triode Q12, the collector electrode of triode Q12 are successively by diode D13, resistance R 16 ground connection.
Power amplification of the present utility model and impedance adjustment circuit 5 are comprised of three identical control units 11.In first control unit, after amplifying through shaping and middle rank, carrier wave transmitted signal Vin-r by push-pull power amplifier triode Q13 and Q14 pipe and a series connection power resistor R0 are sent to Coupling point V-pl.Vcc-p provides direct current to power discharging transistor Q13 and Q14; Vdr-r is that front stage circuits supplies direct current, and Vdr-r just powers when only having use, is in high-impedance state to guarantee pliotron when not driving.Second same circuit of control unit utilization sends to same Coupling point V-pl with another carrier wave transmitted signal Vin-l by a series connection inductance L 0; The 3rd circuit that the control unit utilization is same sends to same Coupling point V-pl with Third Road carrier wave transmitted signal Vin-c by a series connection capacitor C 0.By signal amplitude and the phase place of control transmitted signal Vin-r, Vin-l and Vin-c, capable of dynamic is regulated signal strength signal intensity and the equivalent output impedance of Coupling point V-pl.
Shown in Fig. 1 to 6, the carrier communication method based on power line network impedance dynamic characteristic of the present utility model is:
In a carrier communication local area network (LAN), select several carrier communication frequency channels, regularly send route topological by concentrator and optimize instruction; Each communication node carrier terminal adopts the direct sequence spread spectrum technology to send test massage by previously selected each carrier frequency successively, detect simultaneously the signal strength signal intensity that reflects at same transmit network Nodes, DSP and CPU element utilize sending and receiving to signal strength signal intensity and phase difference the network equivalent impedance under each frequency of this transmitting node is calculated; And be in the signal strength signal intensity that each tranmitting frequency of launch terminal was intercepted and recorded to other carrier terminal in the same LAN, and writing time simultaneously;
After each took turns the route test, each carrier terminal was by from big to small order arrangement of its launch point line impedance tranmitting frequency; According to frequency and the intensity of the return signal that listens to, select three communication objects and three optimum traffic frequencies simultaneously; Then each carrier terminal is used selected communication frequency successively, adjust equivalence emission impedance by Vin-r, Vin-l and Vin-c, to its communication object property verified two-way communication, maximum three the optimal communication objects of locking after the two-way communication success, reach corresponding tranmitting frequency, emission impedance and receive frequency, and the result is beamed back concentrator;
By counting the network routing study of wheel, a best route topological database just builds up, and it is containing markers, and three optimal communication objects of each communication node reach three selected optimum transmitting frequencies and launch output impedance, and three optimum reception frequencies; Each node is intercepted other nodal terminal in the not busy remaining time of communication and is signaled, basis signal intensity, and the decision network impedance variation, the real-time update communication object, thereby so that the optimal communication network topological diagram obtains dynamic optimization;
Concentrator and each node communication terminal are carried out intercommunication in real time according to best route topological figure; Each carrier terminal is switchover intercepting between specified receive frequency, after receiving signal and accepting, to specified route terminal, by best tranmitting frequency adjustment emission output impedance, and carries out the signal transmission.Reactionless such as communication object, then select the suboptimum frequency to carry out repetitive operation; So object is reactionless all the time, then selects the hypo-optimal route object to repeat said process.In above-mentioned communication, only have all the time a frequency in transmission, and according to the annoyance level of network node white noise signal is carried out the most low spread spectrum, thereby effectively utilized signal transmission power and frequency spectrum, also improved widely communication speed and success rate.
The utility model carries out Synchronization Control to transtation mission circuit and receiving circuit in the power line carrier communication circuit, so that sending and receiving signal parallel bi-directional; When signal sends, by specific circuit the actual signal strength signal intensity that sends to electrical network is measured and analyzed, and then determine in real time to send the network impedance of point; Then according to the network impedance matching theory, dynamically adjust the output impedance of transtation mission circuit, maximum to guarantee the actual signal energy that sends.
Aspect carrier networking and route, use termly several selected carrier frequencies respectively network organizing route topological figure to be carried out dynamic optimization.By the mutual sending and receiving test signal of each nodal terminal communication module, according to the signal frequency and the intensity that receive, evade network standing wave point and strong jamming zone, confirm optimal communication object and uplink and downlink communication frequency.The information of uploading in concentrator is marked on when comprising according to each node carrier terminal of receiving, route optimization networking topological database, dynamically adjust the uplink and downlink communication frequency of routed path and every a pair of node, thereby so that intrasystem communication always undertaken by the network path of optimum.
The beneficial effects of the utility model are by above-mentioned design optimization, each node communication terminal capable of dynamic in the power-line carrier communication system is determined its optimal communication object and corresponding sending and receiving communication frequency, and the output matching impedance of radiating circuit, guaranteed that transmitted signal actual transmissions energy is maximum, communication path is best, also so that the progression of the direct sequence spread spectrum during practical communication can be used minimum, thereby both improved widely the carrier wave success rate of once communicating by letter, improved again communication speed.
Another advantage of the present utility model is the actual occupation rate of frequency band low, transmits and receives circuit simpler, and transmitting power is less.
Claims (2)
1. carrier communication system based on power line network impedance dynamic characteristic; comprise concentrator and a plurality of carrier terminal; described concentrator is connected with a plurality of carrier terminals by low-voltage power line; described carrier terminal comprises transtation mission circuit unit and receiving circuit unit; it is characterized in that: described transtation mission circuit unit comprises power amplification and impedance adjustment circuit; modulation digital-to-analogue conversion and pre-amplifying circuit; described receiving circuit unit comprises pre-amplification and filter circuit; demodulation and analog to digital conversion circuit; described carrier terminal also comprises DSP and cpu circuit unit; isolation coupling and protected location, described DSP and cpu circuit unit are to transtation mission circuit unit and receiving circuit unit Synchronization Control.
2. a kind of carrier communication system based on power line network impedance dynamic characteristic according to claim 1, it is characterized in that: the power amplification of described transtation mission circuit unit and impedance adjustment circuit comprise three identical control units, wherein first control unit comprises: resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, capacitor C 11, capacitor C 12, diode D11, diode D12, triode Q11, triode Q12, triode Q13 and triode Q14, the base stage of Vin-r connecting triode Q11, Vin-r and resistance R 11 are all by resistance R 12 ground connection, Vdr-r is by the base stage of resistance R 11 connecting triode Q11, Vdr-r is by the collector electrode of resistance R 13 difference connecting triode Q11 and the base stage of triode Q12, the emitter of triode Q11 connects capacitor C 11 by resistance R 14, capacitor C 11 ground connection, the emitter of triode Q11 is by the emitter of resistance R 15 connecting triode Q14, the emitter of triode Q14 and inter-collector are connected with diode D12, the grounded collector of triode Q14, the collector electrode of Vcc-p connecting triode Q13, the emitter of triode Q13 and inter-collector are connected with diode D11, the emitter of triode Q13 is connected with the emitter of resistance R 15 and triode Q14, the emitter of Vdr-r connecting triode Q12, the base stage of triode Q12 and inter-collector are connected with capacitor C 12, the base stage of the collector electrode connecting triode Q13 of triode Q12, the collector electrode of triode Q12 are successively by diode D13, resistance R 16 ground connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320156210 CN203243325U (en) | 2013-04-01 | 2013-04-01 | Carrier communication system based on dynamic characteristics of power line network impedance |
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| CN 201320156210 CN203243325U (en) | 2013-04-01 | 2013-04-01 | Carrier communication system based on dynamic characteristics of power line network impedance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187990A (en) * | 2013-04-01 | 2013-07-03 | 江苏林洋电子股份有限公司 | Carrier communication system and method based on impedance dynamic characteristic of power line network |
| CN108075808A (en) * | 2017-12-06 | 2018-05-25 | 珠海格力电器股份有限公司 | Power carrier control method for frequency and device |
-
2013
- 2013-04-01 CN CN 201320156210 patent/CN203243325U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187990A (en) * | 2013-04-01 | 2013-07-03 | 江苏林洋电子股份有限公司 | Carrier communication system and method based on impedance dynamic characteristic of power line network |
| CN108075808A (en) * | 2017-12-06 | 2018-05-25 | 珠海格力电器股份有限公司 | Power carrier control method for frequency and device |
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Address after: 226200 Jiangsu city of Nantong province Qidong Economic Development Zone No. 666 Lin Yang Lu Patentee after: JIANGSU LINYANG ENERGY Co.,Ltd. Address before: Qidong City, Jiangsu province 226200 Nantong City Economic Development Zone No. 666 Lin Yang Lu Patentee before: JIANGSU LINYANG ELECTRONICS Co.,Ltd. |
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Effective date of registration: 20200113 Address after: No.188, Tianyuan East Road, Jiangning District, Nanjing, Jiangsu Province Patentee after: JIANGSU HUAYUAN APPARATUS AND INSTR Co.,Ltd. Address before: 226200 Jiangsu city of Nantong province Qidong Economic Development Zone No. 666 Lin Yang Lu Patentee before: JIANGSU LINYANG ENERGY Co.,Ltd. |
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