CN203617994U - Orthogonal frequency division multiplexing (OFDM) multi-carrier modulation electric power data communication circuit - Google Patents
Orthogonal frequency division multiplexing (OFDM) multi-carrier modulation electric power data communication circuit Download PDFInfo
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- CN203617994U CN203617994U CN201320850062.2U CN201320850062U CN203617994U CN 203617994 U CN203617994 U CN 203617994U CN 201320850062 U CN201320850062 U CN 201320850062U CN 203617994 U CN203617994 U CN 203617994U
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Abstract
The utility model discloses an OFDM multi-carrier modulation electric power data communication circuit. The circuit comprises an electric energy meter, a power line, a carrier wave coupling circuit, a receiving circuit, a communication control circuit, a transmission circuit and a power circuit, wherein the carrier wave coupling circuit couples and transmits signals transmitted by the transmission circuit to the power line, simultaneously receives a carrier modulation signal transmitted from the power line, and transmits the carrier modulation signal to the receiving circuit; the receiving circuit performs signal processing on the received signal and then transmits the signal to the communication control circuit; the communication control circuit transmits the received signal to the electric energy meter, simultaneously processes a data signal sent from the electric energy meter to the carrier signal, and transmits the carrier signal to the transmission circuit; the transmission circuit performs power amplification on the carrier signal sent by the communication control circuit and then transmits the carrier signal to the carrier wave coupling circuit; and the power circuit supplies electricity to the above four functional circuits. The OFDM multi-carrier modulation electric power data communication circuit is long in broadband communication distance, excellent in transmission stability, non-unitary in network route mode, and low in working power dissipation.
Description
Technical field
The utility model relates to a kind of datel circuit, particularly a kind of OFDM multi-carrier modulation electric power data telecommunication circuit.
Background technology
Along with the construction of Smart Home, the interconnected mechanics of communication of family data is varied, and wherein PLC mechanics of communication still accounts for main body, and OFDM multi-carrier modulation technology, with its high message transmission rate, is widely used in the equipment such as cable TV, household network access.But the problem such as prior art scheme exists that broadband communications communication distance is short, transmission stability is poor and network route pattern is single.
Utility model content
The purpose of this utility model is to provide a kind of low-power consumption and OFDM multi-carrier modulation electric power data telecommunication circuit cheaply.
This OFDM multi-carrier modulation electric power data telecommunication circuit that the utility model provides, comprises electric energy meter, power line, carrier wave coupling circuit, receiving circuit, communication control circuit, transtation mission circuit and power circuit; The signal coupling that carrier wave coupling circuit transmits transtation mission circuit is sent on power line, receives the carrier (boc) modulated signals being transmitted by power line simultaneously, and this carrier (boc) modulated signals is reached to receiving circuit; Receiving circuit carries out the signal receiving to send to communication control circuit after signal processing; The signal receiving is reached electric energy meter by communication control circuit, and the data-signal simultaneously electric energy meter being sent is processed into carrier signal and reaches transtation mission circuit; The carrier signal that transtation mission circuit transmits communication control circuit carries out reaching carrier wave coupling circuit after power amplification; Power circuit is given above-mentioned four functional circuits power supply.
Described carrier wave coupling circuit and power line carry out impedance matching and Signal Matching.The carrier difference signal being transmitted by described carrier wave coupling circuit is carried out signal shaping, filtering and clamper processing by described receiving circuit.Described communication control circuit comprises microcontroller; The UART port of this communication control circuit by microcontroller or Ethernet port and electric energy meter carry out data transmit-receive; The data-signal that this communication control circuit spreads out of described electric energy meter is processed into simulation high frequency difference carrier signal, simultaneously by the carrier (boc) modulated signals demodulation of being transmitted by described receiving circuit.The data-signal that described transtation mission circuit transmits described communication control circuit carries out power amplification.Described microcontroller adopts the chip that model is AR7000.Described power circuit comprises that model is the DC/DC chip of MP2467DN.
The utility model is the multi-carrier modulation electric power data telecommunication circuit based on Homeplug standard, realizes power line communication speed up to 7 ~ 8Mbps, and this speed is far away the arrowband power line communication circuit of kbps level higher than communication speed; Broadband communications communication distance of the present utility model is long, and transmission stability is good, and network route pattern is not single, and work power consumption be less than 2W, for the primary demand and the following increment demand that meet Utilities Electric Co. provide safeguard.
Accompanying drawing explanation
Fig. 1 is functional block diagram of the present utility model.
Fig. 2 is carrier wave coupling circuit figure of the present utility model.
Fig. 3 is receiving circuit figure of the present utility model.
Fig. 4 is transtation mission circuit figure of the present utility model.
Fig. 5 is communication control circuit figure of the present utility model.
Fig. 6 is peripheral circuit diagram of the present utility model.
Fig. 7 is power circuit diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises electric energy meter, power line, carrier wave coupling circuit, receiving circuit, communication control circuit, transtation mission circuit, peripheral circuit and power circuit.
The power line of carrier wave coupling circuit and 220/230VAC@50Hz carries out impedance and Signal Matching, the modulation signal that transtation mission circuit is transmitted is coupled on power line, convert the carrier (boc) modulated signals being transmitted by power line receiving to carrier difference signal simultaneously, and this carrier difference signal is reached to receiving circuit; Receiving circuit carries out the carrier difference signal receiving after signal shaping, filtering and clamper are processed to send to communication control circuit, communication control circuit carries out the carrier signal from receiving circuit after demodulation, by the data transmit-receive of chip UART port or Ethernet port and intelligent electric energy meter, the data-signal being sent is processed into simulation high frequency difference carrier signal simultaneously reaches transtation mission circuit by this electric energy meter; The simulation high frequency difference carrier signal of communication control circuit output is carried out power amplification by transtation mission circuit, then by carrier wave coupling circuit, this signal coupling is sent on power line.Peripheral circuit is connected with communication control circuit, for data storage.Power circuit is given above-mentioned four functional circuits power supply.
As shown in Figure 2, carrier wave coupling circuit comprises coupling transformer T3, spark pipe V7, coupling capacitance C14, adjusting resistance R6 and adjusting resistance R14.5 pin of coupling transformer T3 are connected with the live wire L end of power line by adjusting resistance R6 series coupled capacitor C 14; Its 6 pin is connected with the zero line N end of power line by adjusting resistance R14; Its 4 pin is connected with the input of receiving circuit, for transmitting carrier difference negative signal RX-; Its 2 pin is connected with the input of receiving circuit, for transmitting carrier difference positive signal RX+; Its 3 pin is connected with the input of transtation mission circuit, for transmitting simulation high frequency difference frequency sub-carrier positive signal TX+; Its 1 pin is connected with the input of transtation mission circuit, for transmitting simulation high frequency difference frequency sub-carrier negative signal TX-.Spark pipe V7 is connected between 5 pin and 6 pin of coupling transformer T3.
Carrier wave coupling circuit of the present utility model is to design according to many modulated carriers of Homeplug Green PHY coupling circuit impedance model; wherein adjusting resistance R6, adjusting resistance R14 are the adjusting resistances of Homeplug Low ESR carrier communication signal; coupling capacitance C14 and spark pipe V7 had both protected whole circuit to avoid the impact of thunderbolt, adverse circumstances, and the many modulated carrier signals of high frequency OFDM can be coupled again.Coupling transformer T3 is that operating frequency range is 2M ~ 30MHz signal coupling transformer, and wherein inputting induction reactance is 18.5uH ± 20%, and output induction reactance is 28.5uH ± 20%, and signal attenuation is less than 1dB.
As shown in Figure 3, receiving circuit comprises first rank Chebyshev's high pass filter, the fertile hereby low pass filter of second-order Bart, the 3rd rank Bart fertile hereby low pass filter, high-frequency signal coupling capacitance C17, high-frequency signal coupling capacitance C21, common mode inhibition device V4 and common mode inhibition device V6.First rank Chebyshev's high pass filter comprises capacitor C 15, capacitor C 16, capacitor C 22, capacitor C 23, inductance L 7, inductance L 8; The fertile hereby low pass filter of second-order Bart comprises capacitor C 18, capacitor C 19, inductance L 5 and inductance L 10; The fertile hereby low pass filter of the 3rd rank Bart is inductance L 6, inductance L 9 and capacitor C 20.
The carrier difference negative signal RX-being transmitted by coupling carrier circuit is connected with the capacitor C 15 of first rank Chebyshev's high pass filter by resistance R 7; The carrier difference positive signal RX+ being transmitted by this coupling filter circuit is connected with the capacitor C 22 of first rank Chebyshev's high pass filter by resistance R 12 simultaneously.The capacitor C 16 of first rank Chebyshev's high pass filter is connected by fertile hereby 1 pin of the inductance L 5 of low pass filter of high-frequency signal coupling capacitance C17 and second-order Bart; The capacitor C 23 of this first rank high pass filter is connected by fertile hereby 1 pin of the inductance L 10 of low pass filter of high-frequency signal coupling capacitance C21 and second-order Bart.2 pin of the fertile hereby inductance L 5 of low pass filter of second-order Bart are connected with fertile hereby 1 pin of the inductance L 6 of low pass filter of the 3rd rank Bart, and 2 pin of the inductance L 10 of this second-order low pass filter are connected with fertile hereby 1 pin of the inductance L 9 of low pass filter of the 3rd rank Bart.Fertile hereby 2 pin of the inductance L 6 of low pass filter of the 3rd rank Bart are connected with 30 pin of the microcontroller in communication control circuit, for transmitting negative signal RXIN_N; Fertile hereby 2 pin of the inductance L 9 of low pass filter of the 3rd rank Bart are connected with 31 pin of the microcontroller in communication control circuit, for transmitting positive signal RXIN_P.
The 1 pin ground connection of common mode inhibition device V4, its 2 pin is connected with power supply V3P3A, and its 3 pin is connected with fertile hereby 2 pin of the inductance L 6 of low pass filter of the 3rd rank Bart, and this 3 pin is also connected with 3 pin of common mode inhibitor V6 by resistance R 49.The 1 pin ground connection of common mode inhibition device V6; Its 2 pin is connected with power supply V3P3A, and its 3 pin is connected with fertile hereby 2 pin of the inductance L 9 of low pass filter of the 3rd rank Bart.
Power supply V3P3A is connected with power supply V3P3 by inductance L 14, and capacitor C 59 is connected between power supply V3P3A and ground, after capacitor C 52 is in parallel with capacitor C 58, is connected between power supply V3P3 and ground.
Receiving circuit is one group of three rank band pass filter to many modulated carriers of OFDM differential signal, and circuit work frequency scope is 1MHz ~ 45MHz, the form of this filter can adopt Chebyshev and Bart fertile hereby two types be used in combination.
The effect of resistance R 7 and resistance R 49, resistance R 12 and resistance R 49 is dividing potential drops, adjusts inner differential signal input voltage value.Capacitor C 52, capacitor C 58, capacitor C 59 and inductance L 14 Main Functions are isolation power supplies, avoid power line outside and instrument and meter internal electric source noise jamming.The effect of common mode inhibition device V4 and common mode inhibition device V5 is the common-mode noise that suppresses differential signal, the input port of master chip in protection communication control circuit.
As shown in Figure 4, transtation mission circuit comprises rectifier diode V10, rectifier diode V11, rectifier diode V17, rectifier diode V18, capacitor C25, capacitor C26, capacitor C27 and capacitor C28.
32 pin by microcontroller in communication control circuit are connected with one end of capacitor C25, be used for receiving simulation high frequency difference frequency sub-carrier positive signal TXOUT_N, this pin is also connected with the negative electrode of rectifier diode V17, the plus earth of rectifier diode V17, simultaneously this pin also with the anodic bonding of rectifier diode V18, the negative electrode of rectifier diode V18 is connected with power supply V3P3B.Capacitor C26 and capacitor C25 are connected in parallel.The other end of capacitor C25 is connected with 3 pin of coupling transformer T3 in carrier wave coupling circuit, for transmitting simulation high frequency difference frequency sub-carrier positive signal TX+.34 pin by microcontroller in communication control circuit are connected with one end of capacitor C27, be used for receiving simulation high frequency difference frequency sub-carrier negative signal TXOUT_P, this pin is also connected with the negative electrode of rectifier diode V10, the plus earth of rectifier diode V10, simultaneously this pin also with the anodic bonding of rectifier diode V11, the negative electrode of rectifier diode V11 is connected with power supply V3P3B.Capacitor C28 and capacitor C27 are connected in parallel.The other end of capacitor C27 is connected with 1 pin of coupling transformer T3 in carrier wave coupling circuit, for transmitting simulation high frequency difference frequency sub-carrier negative signal TX-.Capacitor C 24 is connected between transtation mission circuit and carrier wave coupling circuit link, two groups of shunt capacitors.
Power supply V3P3B is connected with power supply V3P3 by inductance L 13; The negative electrode of voltage stabilizing didoe V12 is connected with power supply V3P3B, its plus earth; The positive pole of polar capacitor C45 is connected with power supply V3P3B, its minus earth.
The Main Function of transtation mission circuit is that the many modulated carrier signals of OFDM of communication control circuit output are carried out to rectification and power amplification.The effect of inductance L 13, polar capacitor C45 and voltage stabilizing didoe V12 is isolation power supply, and wherein, polar capacitor C45 big capacity electrolyte capacitor is to provide enough powers when sending to OFDM carrier signal.
The rectified current flow valuve of rectifier diode V10, rectifier diode V11, rectifier diode V17 and rectifier diode V18 is 1A, and the withstand voltage of each diode is 40V.Capacitor C25, capacitor C26, capacitor C27 and capacitor C28 are the film capacitors of high withstand voltage 1% precision, for the OFDM high-frequency signal that is coupled.Capacitor C 24 is for the correction of differential signal.
Communication control circuit comprises microcontroller and peripheral circuit.
As shown in Figure 5, microcontroller is as the master chip of communication control circuit, the chip that the model that can adopt QualCom company is AR7000.This chip adopts OFDM multi-carrier modulation technology, meets Homeplug technical standard, with 3.3V power supply, built-in RAM and ROM, inner integrated AFE(AFE (analog front end)) and PMU(Power Management Unit), the outside constant temperature crystal that uses 25MHz ± 10ppm precision.Power line carrier operating frequency is 2 ~ 30MHz, and in theory, UDP transmission rate is 8Mbps, and TCP transmission rate is 7Mbps; On-the-spot test carrier data speed is 7 ~ 8Mbps, and work power consumption is less than 2W.
Microcontroller is connected with receiving circuit with 31 pin by its 30 pin, is connected with 34 pin by its 32 pin with transtation mission circuit, carries out data communication by its 14 pin and 15 pin and electric energy meter.
As shown in Figure 6, peripheral circuit comprises memory and master chip power circuit.Memory adopts the large capacity flash memory of a 16Mbits, for data storage.Master chip power circuit is the microcontroller power supply in communication control circuit.
Master chip power circuit comprises capacitor C 65, inductance L 15, capacitor C 70, capacitor C 71.Master chip power supply Vcore_A is connected with power supply Vcore by inductance L 15; After capacitor C 70 and capacitor C 71 parallel connections, be connected between master chip power supply Vcore_A and ground; Capacitor C 65 is connected between master chip power supply Vcore and ground.
As shown in Figure 7, the efficient DC/DC chip that it is MP2467DN that power circuit mainly adopts the model of a Xin Yuan company of the U.S., its switching frequency is fixed as 500kHz, operating voltage is 6V to 36V, input withstand voltage is 40V, and cut-off current is less than 100uA, and conversion efficiency is greater than 95%, operating current 2.5A, can guarantee the operating current of microcontroller chip 3.3V working power and 500mA in communication control circuit.
Resistance R 51 and resistance R 52 are the output voltage adjusting resistance of this DC/DC chip; Resistance R 54 is that this DC/DC chip input enables pull-up resistor; Capacitor C 40, capacitor C 1 and resistance R 1 are for improving DC/DC chip switching frequency; Resistance R 4 is pull down resistors, and this DC/DC chip is not resetted; Diode D8 is Schottky diode; Inductance L 1 is energy storage inductor, for guaranteeing that DC/DC chip power output is in 1.5W left and right.
Claims (7)
1. an OFDM multi-carrier modulation electric power data telecommunication circuit, comprises electric energy meter and power line, it is characterized in that, this circuit also comprises carrier wave coupling circuit, receiving circuit, communication control circuit, transtation mission circuit and power circuit; The signal coupling that carrier wave coupling circuit transmits transtation mission circuit is sent on power line, receives the carrier (boc) modulated signals being transmitted by power line simultaneously, and this carrier (boc) modulated signals is reached to receiving circuit; Receiving circuit carries out the signal receiving to send to communication control circuit after signal processing; The signal receiving is reached electric energy meter by communication control circuit, and the data-signal simultaneously electric energy meter being sent is processed into carrier signal and reaches transtation mission circuit; The carrier signal that transtation mission circuit transmits communication control circuit carries out reaching carrier wave coupling circuit after power amplification; Power circuit is given above-mentioned four functional circuits power supply.
2. OFDM multi-carrier modulation electric power data telecommunication circuit according to claim 1, is characterized in that, described carrier wave coupling circuit and power line carry out impedance matching and Signal Matching.
3. OFDM multi-carrier modulation electric power data telecommunication circuit according to claim 1, is characterized in that, the carrier difference signal being transmitted by described carrier wave coupling circuit is carried out signal shaping, filtering and clamper processing by described receiving circuit.
4. OFDM multi-carrier modulation electric power data telecommunication circuit according to claim 1, is characterized in that, described communication control circuit comprises microcontroller; The UART port of this communication control circuit by microcontroller or Ethernet port and electric energy meter carry out data transmit-receive; The data-signal that this communication control circuit spreads out of described electric energy meter is processed into simulation high frequency difference carrier signal, simultaneously by the carrier (boc) modulated signals demodulation of being transmitted by described receiving circuit.
5. OFDM multi-carrier modulation electric power data telecommunication circuit according to claim 1, is characterized in that, the data-signal that described transtation mission circuit transmits described communication control circuit carries out power amplification.
6. OFDM multi-carrier modulation electric power data telecommunication circuit according to claim 4, is characterized in that, described microcontroller adopts the chip that model is AR7000.
7. OFDM multi-carrier modulation electric power data telecommunication circuit according to claim 1, is characterized in that, described power circuit comprises that model is the DC/DC chip of MP2467DN.
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| CN201320850062.2U CN203617994U (en) | 2013-12-20 | 2013-12-20 | Orthogonal frequency division multiplexing (OFDM) multi-carrier modulation electric power data communication circuit |
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| CN201320850062.2U CN203617994U (en) | 2013-12-20 | 2013-12-20 | Orthogonal frequency division multiplexing (OFDM) multi-carrier modulation electric power data communication circuit |
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Cited By (6)
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| CN107733469A (en) * | 2017-11-17 | 2018-02-23 | 联桥科技有限公司 | A kind of power wire broadband carrier communication anti-jamming circuit |
| CN108347802A (en) * | 2018-01-17 | 2018-07-31 | 昂宝电子（上海）有限公司 | Utilize the multiplex circuit system of signal wire time sharing transmissions signal and electric energy |
| CN108574514A (en) * | 2018-06-20 | 2018-09-25 | 广东华美骏达电器有限公司 | Based on power carrier constant temperature machine control system |
| CN111049594A (en) * | 2019-12-20 | 2020-04-21 | 成都长城开发科技有限公司 | Noise absorption circuit, test method and ammeter |
| CN113676222A (en) * | 2021-01-26 | 2021-11-19 | 青岛鼎信通讯股份有限公司 | Fusion scheme coupler for medium-voltage carrier communication |
| CN114094581A (en) * | 2022-01-19 | 2022-02-25 | 深圳市暗能量电源有限公司 | Power supply system based on power line carrier communication and communication method thereof |
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2013
- 2013-12-20 CN CN201320850062.2U patent/CN203617994U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107733469A (en) * | 2017-11-17 | 2018-02-23 | 联桥科技有限公司 | A kind of power wire broadband carrier communication anti-jamming circuit |
| CN107733469B (en) * | 2017-11-17 | 2023-10-20 | 联桥科技有限公司 | Anti-interference circuit for power line broadband carrier communication |
| CN108347802A (en) * | 2018-01-17 | 2018-07-31 | 昂宝电子（上海）有限公司 | Utilize the multiplex circuit system of signal wire time sharing transmissions signal and electric energy |
| CN108574514A (en) * | 2018-06-20 | 2018-09-25 | 广东华美骏达电器有限公司 | Based on power carrier constant temperature machine control system |
| CN108574514B (en) * | 2018-06-20 | 2023-08-29 | 广东华美骏达电器有限公司 | Constant temperature machine control system based on power carrier |
| CN111049594A (en) * | 2019-12-20 | 2020-04-21 | 成都长城开发科技有限公司 | Noise absorption circuit, test method and ammeter |
| CN111049594B (en) * | 2019-12-20 | 2021-09-24 | 成都长城开发科技有限公司 | Noise absorption circuit, test method and ammeter |
| CN113676222A (en) * | 2021-01-26 | 2021-11-19 | 青岛鼎信通讯股份有限公司 | Fusion scheme coupler for medium-voltage carrier communication |
| CN114094581A (en) * | 2022-01-19 | 2022-02-25 | 深圳市暗能量电源有限公司 | Power supply system based on power line carrier communication and communication method thereof |
| CN114094581B (en) * | 2022-01-19 | 2022-04-08 | 深圳市暗能量电源有限公司 | Power supply system based on power line carrier communication and communication method thereof |
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Address after: 410205 No. 468 west slope, Changsha hi tech Industrial Development Zone, Changsha, Hunan, Yuelu District, Tongzi Patentee after: WILLFAR INFORMATION TECHNOLOGY Co.,Ltd. Address before: 410205 No. 468 west slope, Changsha hi tech Industrial Development Zone, Changsha, Hunan, Yuelu District, Tongzi Patentee before: HUNAN WEISHENG INFORMATION TECHNOLOGY CO.,LTD. Address after: 410205 No. 468 west slope, Changsha hi tech Industrial Development Zone, Changsha, Hunan, Yuelu District, Tongzi Patentee after: HUNAN WEISHENG INFORMATION TECHNOLOGY CO.,LTD. Address before: 410205 No. 468 west slope, Changsha hi tech Industrial Development Zone, Changsha, Hunan, Yuelu District, Tongzi Patentee before: CHANGSHA WASION INFORMATION TECHNOLOGY Co.,Ltd. |
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