CN203445873U - Multiphase power line carrier communication apparatus - Google Patents
Multiphase power line carrier communication apparatus Download PDFInfo
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- CN203445873U CN203445873U CN201320425579.7U CN201320425579U CN203445873U CN 203445873 U CN203445873 U CN 203445873U CN 201320425579 U CN201320425579 U CN 201320425579U CN 203445873 U CN203445873 U CN 203445873U
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Abstract
The utility model provides a multiphase power line carrier communication apparatus. The apparatus is connected with at least two phases of power line coupling circuits with power lines connected correspondingly. The apparatus includes signal transmitting-receiving modules correspondingly connected with each of the power line coupling circuits, modems correspondingly connected with each of the signal transmitting-receiving modules, and a processor respectively connected with each of the modems and used for coordinating and controlling each of the modems according to channel work parameters. According to the multiphase power line carrier communication apparatus, multiphase power line carrier communication can be achieved by one processor, coordination of multiphase power line communication and real-time communication of any one phase or multiphase power lines are achieved, and more importantly, the integration level of the multiphase power line carrier communication apparatus is raised with saved chip cost.
Description
Technical field
The utility model relates to power-line carrier communication, relates in particular to a kind of polyphase electric power wire carrier wave communication device.
Background technology
Along with the extensive use of power-line carrier communication, power line channel decay is large, interference characteristic is complicated and reliability and the not high problem of validity of the impedance variation power line communication causing such as large just become the problem of needing solution badly.
A kind of device for power line carrier communications of the normal employing of prior art, this device comprises power line coupler, signal processing module and processor form, wherein, the power-on and power-off line of force that power couplers is signal of communication by each phase transformation of three-phase power line, and the signal of each phase power line of access to plant is carried out to the processing such as impedance matching, after processing, transmit the signal to signal processing module, processor control signal processing module by every phase power line is amplified the signal transmitting in this phase power line, sampling, separate mediation modulation and wait processing, thereby realize the reliable of power line communication and effectively transmission.
But, in prior art, in order to realize the real time communication of polyphase electric power line, need to all configure a processor for each phase power line in polyphase electric power line carrier communication, and need to outside this device, arrange one and focus on device, coordinate the control of each processor to each phase power line carrier communication, thereby cause device for power line carrier communications to have the problem that integrated level is low, complexity is high.
Utility model content
The utility model provides a kind of polyphase electric power wire carrier wave communication device, for solving the problem that existing device for power line carrier communications integrated level is low, complexity is high.
First aspect of the present utility model is to provide a kind of polyphase electric power wire carrier wave communication device, described device is with at least the corresponding connected power line coupling circuit of two-phase power line is connected, described device comprises: connected signal transmitting and receiving module corresponding to power line coupling circuit described in each, with the corresponding modulator-demodulator being connected of signal transmitting and receiving module described in each, and be connected respectively with modulator-demodulator described in each for coordinate to control a processor of each modulator-demodulator according to passage running parameter.
Device as above, described in each, signal transmitting and receiving module comprises signal receive path and signal sendaisle;
Described signal receive path comprises connected successively low noise amplifier, electric capacity, programmable amplifier and analog to digital converter, described low noise amplifier is connected with the described power line coupling circuit of corresponding phase, and described analog to digital converter is connected with corresponding described modulator-demodulator;
Described signal sendaisle comprises connected successively power amplifier, low pass filter and digital to analog converter, and described power amplifier is connected with the described power line coupling circuit of corresponding phase, and described digital to analog converter is connected with corresponding described modulator-demodulator.
Device as above, described low noise amplifier, described programmable amplifier and described power amplifier are the adjustable amplifier of gain.
Device as above, described signal receive path comprises at least one low noise amplifier, and described in each, low noise amplifier is connected in series.
Device as above, described signal receive path comprises at least one programmable amplifier, and described in each, programmable amplifier is connected in series.
Device as above, described in each, modulator-demodulator comprises: signal processing module, status control module and frequency synthesis module;
Status control module described in each, for the operating result of by bus, described status control module being read and write according to processor, configure the messaging parameter of described signal processing module, and the clock frequency multiple of described frequency synthesis module is set according to the operating result of described read-write; Wherein, described messaging parameter comprises that signal to noise ratio snr is estimated, received signal strength indicator RSSI estimates, automatic gain is controlled AGC adjustment and step response;
Frequency synthesis module described in each, raises or reduces clock frequency for the clock frequency multiple producing according to described status control module, and the clock of at least two kinds of frequencies is provided with the device in described signal processing module;
Signal processing module described in each, for the clock of described at least two kinds of frequencies of providing according to the described messaging parameter of described status control module configuration and described frequency synthesis module, modulates or demodulation process signal.
Device as above, connected signal transmitting and receiving module corresponding to power line coupling circuit described in each is at least two.
The utility model polyphase electric power wire carrier wave communication device, the carrier communication of polyphase electric power line is realized by a processor, not only completed the Coordination Treatment of polyphase electric power line communication, realized the real time communication of any phase or polyphase electric power line, the more important thing is the integrated level that has improved device for power line carrier communications, saved chip cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model polyphase electric power wire carrier wave communication device one embodiment;
Fig. 2 a and Fig. 2 b are the modem structure schematic diagram of the utility model polyphase electric power wire carrier wave communication device embodiment;
Fig. 3 is the structural representation of another embodiment of the utility model polyphase electric power wire carrier wave communication device.
Embodiment
Fig. 1 is the structural representation of the utility model polyphase electric power wire carrier wave communication device one embodiment, and this device can be applied to all kinds of low-voltage powerline carrier communication systems, as all kinds of automatic meter reading systems and power load control system etc.This is heterogeneous can be two-phase or three-phase, can be connected with outside power line coupling circuit according to actual needs.As shown in Figure 1, this device 101 can be connected with the power line coupling circuit of at least corresponding connection of two-phase low-voltage power line, wherein, this device 101 can comprise: connected signal transmitting and receiving module 102 corresponding to this power line coupling circuit, with this signal transmitting and receiving module 102 corresponding modulator-demodulator being connected 103 respectively, and be connected respectively with this modulator-demodulator 103 respectively for according to a passage running parameter coordination control processor 104 of this modulator-demodulator 103 respectively.
Particularly, in the present embodiment, with this device 101 and the first power line coupling circuit 1051, the second power line coupling circuit 1052 and the 3rd power line coupling circuit 1053, be all connected to that example describes, now above-mentioned heterogeneous be three-phase, wherein, each power line coupling circuit is corresponding with a phase low-voltage power line is connected.As shown in Figure 1, this device 101 comprises: three signal transmitting and receiving modules 102, three modulator-demodulators 103 and processors 104.Wherein, one end of this signal transmitting and receiving module 102 is connected with outside power line coupling circuit, and the input of the modulator-demodulator 103 that the other end is inner with device is connected, can be for receiving and transmitted signal; This modulator-demodulator 103 is connected with processor 104, for carrying out to the received signal demodulation process according to the configuration of this processor 104, and to wanting transmitted signal to carry out modulation treatment; This processor 104 is connected with three these modulator-demodulators 103 respectively, for the data of sending according to three these modulator-demodulators 103, process, and control mode of operation and the state of three modulator-demodulators 103, to coordinate the communication conditions of each signal transmitting and receiving module 102.Processor 104 can coordinate to control according to passage running parameters such as the signal strength signal intensity of each signal transmitting and receiving module 102, signal to noise ratios the real time communication of each signal transmitting and receiving module 102, the fluctuation of the line voltage causing to avoid the phase mutual interference of each low-voltage powerline carrier communication etc., thus make the problem of channel quality variation.For example, in figure, this first power line coupling circuit 1051, this second power line coupling circuit 1052 and the 3rd power line coupling circuit 1053 correspond respectively to three-phase power line A, B, C, the data judgement that processor 104 can send according to each modulator-demodulator 103 of last cycle, as it is poor to judge last cycle A line channel quality, current period can be by B line and the signal transmission channel of C line, thereby the coordination realizing between polyphase electric power line carrier communication is controlled, and guarantees communication quality.Wherein, this coordination control can comprise controls the conducting of each signal transmitting and receiving module and close, the operating frequency of each signal transmitting and receiving module etc., but not as limit.
Wherein, each modulator-demodulator 103 is connected by bus with processor 104, i.e. data/address bus, control bus and address bus; Modulator-demodulator 103 can be realized the modulation /demodulation of frequency shift keying below 500KHz (Frequency-shift keying is called for short FSK) or phase shift keying (Phase-shift keying is called for short PSK) signal etc., and processor 104 is determined its operating frequency.This processor 104 can be preferably microcontroller (Microcontroller Unit is called for short MCU), also can be chosen for the processor of other types, and the actual treatment that can install 101 pairs of signals according to this requires to choose, and does not limit herein.
Alternatively, each signal transmitting and receiving module 102 comprises signal receive path 106 and signal sendaisle 107; This signal receive path 106 comprises connected successively low noise amplifier (Low Noise Amplifier, be called for short LNA) 108, electric capacity 109, programmable amplifier (Program Gain Amplifier, be called for short PGA) 110 and analog to digital converter (Analog to Digital Converter, be called for short ADC) 111, wherein, this LNA108 is connected with this power line coupling circuit of corresponding phase, and this ADC111 is connected with corresponding modulator-demodulator 103; This signal sendaisle 107 can comprise connected successively power amplifier (Power Amplifier, be called for short PA) 112, low pass filter (Low Pass Filter, be called for short LPF) 113 and digital to analog converter (Digital to Analog Converter, be called for short DAC) 114, wherein, this PA112 is connected with the power line coupling circuit of corresponding phase, and this DAC114 is connected with corresponding modulator-demodulator 103.
This LNA108 and this PGA110 can be differential amplifier, can difference input and difference output; This ADC111 can be also difference input, but not as limit; This LPF113 can arrange filter bandwidht.
Preferably, this LNA108, this PGA110 and this PA112 can be all the adjustable amplifier that gains.Wherein, this gain is adjustable to be referred to signal amplification or decay, as gained, can be adjusted to 0.1 times of original signal, is equivalent to the decay of signal; And for example gain and can be adjusted to 10 times of original signal, be equivalent to the amplification of signal.This gain can regulate automatic gain control (Automatic Gain Control the is called for short AGC) unit in modulator-demodulator 103.
Preferably, in this signal receive path 106, can comprise at least one LNA108, and respectively this LNA108 is connected in series.
Preferably, in this signal receive path 106, can comprise at least one PGA110, and respectively this PGA110 is connected in series.
The operation principle of the present embodiment is: the signal of low-voltage power line carrying is after power line coupling circuit is processed, by installing 101 pin, be sent to the LNA108 place in signal receive path 106, after signal being amplified by LNA108, in the filtering through electric capacity 109, after impedance matchings etc. are processed, by PGA110, this signal is amplified to the input range of ADC111, by ADC111, this signal is converted to digital signal and sends modulator-demodulator 103 processing to, demodulator in modulator-demodulator 103 carries out demodulation process to the digital signal receiving, as FSK or PSK demodulation etc., data after processing are sent to processor 104 by data/address bus, for processor 104, carry out data processing, reception and processing with settling signal.Treated device 104 sends the data after processing to modulator in modulator-demodulator 103 by data/address bus after processing, this modulator carries out modulation treatment to the operating result of this modulator read-write to these data by bus according to processor 104, as FSK or PSK modulation etc., after being disposed, be sent to the analog-converted that DAC114 carries out digital signal, form analog signal, after LPF113 filtering, be sent to PA112, by PA, this signal is carried out to power amplification, pin by this device 101 sends to outside power line coupling circuit, the transmission of settling signal afterwards.
The present embodiment, in polyphase electric power wire carrier wave communication device, the carrier communication of polyphase electric power line is realized by a processor, not only completed the Coordination Treatment of polyphase electric power line communication, realized the real time communication of any phase or polyphase electric power line, the more important thing is the integrated level that has improved device for power line carrier communications, saved chip cost.
Fig. 2 a and Fig. 2 b are the modem structure schematic diagram of the utility model polyphase electric power wire carrier wave communication device embodiment, and each modulator-demodulator can comprise: signal processing module, status control module and frequency synthesis module; Each status control module, for the operating result of by bus, this status control module being read and write according to processor, configures the messaging parameter of this signal processing module, and the clock frequency multiple of this frequency synthesis module is set according to the operating result of this read-write; Wherein, described messaging parameter comprises that signal to noise ratio (Signal to Noise Ratio is called for short SNR) is estimated, received signal strength indicator (Receive Signal Strength Indicator is called for short RSSI) is estimated, AGC adjusts and step response; Each frequency synthesis module, raises or reduces clock frequency for the clock frequency multiple producing according to this status control module, and the clock of at least two kinds of frequencies is provided with the device in signal processing module; Each signal processing module, the clock of these at least two kinds of frequencies that provide for this messaging parameter and this frequency synthesis module configuring according to this status control module, modulates or demodulation process signal.
Wherein, frequency synthesis module can provide to the device in signal processing module multiple clock frequency, for example, frequency synthesis module receives after the double instruction of the clock frequency of status control module, for each unit in signal processing module and the double clock of each cell configuration frequency, can realize so the real-time change of each unit and each device operating frequency, the work that can guarantee again this device that each connects remains clock frequency coupling.This frequency synthesis module can be for being integrated in the clock generator in modulator-demodulator.
Fig. 2 a is the demodulator structure schematic diagram of this modulator-demodulator, and as shown in Figure 2 a, this demodulator 201 can comprise: first signal processing module 202, the first status control module 203 and first frequency synthesis module 204.First signal processing module 202, the first status control module 203 are connected mutually with first frequency synthesis module 204, and meanwhile, this first status control module 203 is connected with processor 104 by data/address bus, control bus and address bus.This first status control module 203 is for producing clock frequency multiple according to processor 104 to the operating result of its read-write, and for configure the messaging parameter of these first signal processing module 202 devices according to the operating result of these processor 104 read-writes, described messaging parameter can comprise the parameters such as frequency range, code speed, signal bandwidth, frequency deviation, SNR estimation, RSSI estimation, AGC adjustment and step response; Simultaneously this first status control module 203 also can control each unit and each device in this first signal processing module 202 modulation system, gain, receive, open and the operating state such as pass; The clock frequency multiple that this first frequency synthesis module 204 produces according to this first status control module 203 raises or reduces clock frequency, and the clock of different frequency is provided with the device in this first signal processing module 202.
Wherein, this first signal processing module 202 is carried out signal processing for the clock frequency providing based on first frequency synthesis module 204.Concrete signal processor and the course of work can have multiple, arrange according to actual needs, and the utility model does not limit this.First signal processing module 202 preferably can comprise: band pass filter (Band-Pass Filter, abbreviation BPF), numerically-controlled oscillator (Numerical Controlled Oscillator, abbreviation NCO), Digital Down Convert (Digital Down Converter is called for short DDC) unit, LPF, AGC unit, RSSI unit, SNR unit, FSK demodulating unit, PSK demodulating unit and loop filter.As shown in Figure 2 a, in figure, arrow representative data flows to the annexation of these first signal processing module 202 internal components.
The operation principle of the present embodiment demodulator 201 is: ADC111 exports digital signal to BPF, the sample frequencys such as the centre frequency that this BPF arranges according to first frequency synthesis module 204 and bandwidth are carried out filtering processing to digital signal, BPF output and NCO output are as the input of DDC unit, the output of DDC unit is connected with LPF, LPF exports base-band information, inputs respectively AGC unit, RSSI unit, FSK demodulating unit and PSK demodulating unit.RSSI unit carries out energy measuring to signal, for detection of signal energy size or evaluation of signal quality; AGC unit, to LNA108 and the PGA110 control that gains, makes signal receive path 106 be operated in optimum state; FSK demodulating unit carries out demodulation to fsk signal, and exports baseband signal; PSK demodulating unit carries out demodulation to psk signal, and exports baseband signal, and PSK demodulating unit is outgoing carrier information simultaneously, and for adjusting frequency and the phase place of NCO, this carrier information carries out filtering by loop filter, and the output of loop filter is connected with NCO.The circuit such as AGC unit, RSSI unit, FSK demodulating unit, PSK demodulating unit, NCO local frequency word are all connected with the first status control module 203 (in figure, simplified these annexations, representative is only connected with first signal processing module 202 with four-headed arrow).
Fig. 2 b is the modulator structure schematic diagram of this modulator-demodulator, and as shown in Figure 2 b, this modulator 205 can comprise: secondary signal processing module 206, the second status control module 207 and second frequency synthesis module 208.Secondary signal processing module 206, the second status control module 207 are connected mutually with second frequency synthesis module 208, and meanwhile, this second status control module 207 is connected with processor 104 by data/address bus, control bus, address bus.This second status control module 207 is for producing clock frequency multiple according to processor 104 to the operating result of its read-write, and for configure the messaging parameter of these secondary signal processing module 206 devices according to the operating result of these processor 104 read-writes, described messaging parameter can comprise the parameters such as frequency range, code speed, signal bandwidth, frequency deviation, SNR estimation, RSSI estimation, AGC adjustment and step response; Simultaneously this second status control module 207 also can control each unit and each device in this secondary signal processing module 206 modulation system, gain, send, open and the operating state such as pass; The clock frequency multiple that this second frequency synthesis module 208 produces according to this second status control module 207 raises or reduces clock frequency, and the clock of different frequency is provided with the device in this secondary signal processing module 206.
Wherein, this secondary signal processing module 206 is carried out signal processing for the clock frequency providing based on second frequency synthesis module 208.Concrete signal processor and the course of work can have multiple, arrange according to actual needs, and the utility model does not limit this.Secondary signal processing module 206 preferably can comprise: (Gain Control is called for short GC) unit is controlled in baseband processing unit, FSK modulating unit, PSK modulating unit, data decimation device (Multiplexer is called for short Mux) and gain.As shown in Figure 2 b, in figure, arrow representative data flows to the annexation of these secondary signal processing module 206 internal components.Meanwhile, baseband processing unit, FSK modulating unit, PSK modulating unit, Mux and GC unit are all connected with the second status control module 207 (in figure, simplified these annexations, representative is only connected with secondary signal processing module 206 with four-headed arrow).
The operation principle of the present embodiment modulator 205 is: processor is by data to be sent, move into baseband processing unit, baseband processing unit carries out Base-Band Processing to baseband signal, the output of Base-Band Processing is connected with FSK modulating unit, PSK modulating unit, FSK modulating unit is modulated into fsk signal by this baseband signal, and PSK modulating unit is modulated into psk modulation signal by this baseband signal.FSK and psk modulation signal input alternative Mux, choose a kind of signal and input to GC unit, and the output of GC unit is connected with DAC114, thus the output of settling signal.
The present embodiment, by increase frequency synthesis module in modulator-demodulator, down-sampled or rise the mode of sampling by numeral, realize the tdm communication of multiband, do not need the extra new device that increases, saved chip area and cost.
Fig. 3 is the structural representation of another embodiment of the utility model polyphase electric power wire carrier wave communication device, and the present embodiment is on the basis of above-described embodiment, and further, connected signal transmitting and receiving module corresponding to this power line coupling circuit is at least two.As shown in Figure 3, signal transmitting and receiving module corresponding to each power line coupling circuit of take illustrates (in figure in order to simplify for example as three, saved in this device and the second power line coupling circuit 1052 signal transmitting and receiving module and modulator-demodulator of being connected corresponding to the 3rd power coupling circuit 1053), first signal transceiver module 301, secondary signal transceiver module 302 is connected with the first power line coupling circuit 1051 respectively with the 3rd signal transmitting and receiving module 303, each signal transmitting and receiving module is the corresponding modulator-demodulator that is connected respectively, each modulator-demodulator is connected with a processor 104 equally.
Three signal transmitting and receiving modules are connected with same power line coupling circuit, by same processor, controlled, by modulator-demodulator separately, realizing the multiband of the single-phase electricity line of force communicates by letter, can realize at same power line the communication of three frequency ranges simultaneously, communication specific implementation and the above-mentioned implementation of each frequency range are similar, repeat no more herein.Under equal traffic rate prerequisite, three signal transmitting and receiving modules are received and dispatched three different frequency ranges simultaneously, and traffic rate improves three times in theory.And, because other phase power lines also can connect at least two signal transmitting and receiving modules, so can realize the power line carrier communication of multichannel multiband, when certain frequency range, certain modulation system are not suitable for communicating by letter, can easier detect channel and select suitable channel, modulation system to communicate by same processor.
Further, the signal transmitting and receiving module corresponding with the power line of each phase can be for individual arbitrarily, can arrange according to actual needs, for example two signal transmitting and receiving modules can be set on the A of three-phase power line line, or three signal transmitting and receiving modules are set on B line, or at C line, three signal transmitting and receiving modules are set, do not do any restriction herein.
The present embodiment, by being at least two in connected signal transmitting and receiving module corresponding to power line coupling circuit, realizes the multiband tdm communication of polyphase electric power line, has improved communication efficiency.
Finally it should be noted that: each embodiment, only in order to the technical solution of the utility model to be described, is not intended to limit above; Although the utility model is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (7)
1. a polyphase electric power wire carrier wave communication device, it is characterized in that, described device is with at least the corresponding connected power line coupling circuit of two-phase power line is connected, described device comprises: connected signal transmitting and receiving module corresponding to power line coupling circuit described in each, with the corresponding modulator-demodulator being connected of signal transmitting and receiving module described in each, and be connected respectively with modulator-demodulator described in each for coordinate to control a processor of each modulator-demodulator according to passage running parameter.
2. polyphase electric power wire carrier wave communication device according to claim 1, is characterized in that:
Described in each, signal transmitting and receiving module comprises signal receive path and signal sendaisle;
Described signal receive path comprises connected successively low noise amplifier, electric capacity, programmable amplifier and analog to digital converter, described low noise amplifier is connected with the described power line coupling circuit of corresponding phase, and described analog to digital converter is connected with corresponding described modulator-demodulator;
Described signal sendaisle comprises connected successively power amplifier, low pass filter and digital to analog converter, and described power amplifier is connected with the described power line coupling circuit of corresponding phase, and described digital to analog converter is connected with corresponding described modulator-demodulator.
3. polyphase electric power wire carrier wave communication device according to claim 2, is characterized in that, described low noise amplifier, described programmable amplifier and described power amplifier are the adjustable amplifier of gain.
4. polyphase electric power wire carrier wave communication device according to claim 2, is characterized in that, described signal receive path comprises at least one low noise amplifier, and described in each, low noise amplifier is connected in series.
5. polyphase electric power wire carrier wave communication device according to claim 2, is characterized in that, described signal receive path comprises at least one programmable amplifier, and described in each, programmable amplifier is connected in series.
6. according to the polyphase electric power wire carrier wave communication device described in claim 1～5 any one, it is characterized in that:
Described in each, modulator-demodulator comprises: signal processing module, status control module and frequency synthesis module;
Status control module described in each, for the operating result of by bus, described status control module being read and write according to processor, configure the messaging parameter of described signal processing module, and the clock frequency multiple of described frequency synthesis module is set according to the operating result of described read-write; Wherein, described messaging parameter comprises that signal to noise ratio snr is estimated, received signal strength indicator RSSI estimates, automatic gain is controlled AGC adjustment and step response;
Frequency synthesis module described in each, raises or reduces clock frequency for the clock frequency multiple producing according to described status control module, and the clock of at least two kinds of frequencies is provided with the device in described signal processing module;
Signal processing module described in each, for the clock of described at least two kinds of frequencies of providing according to the described messaging parameter of described status control module configuration and described frequency synthesis module, modulates or demodulation process signal.
7. polyphase electric power wire carrier wave communication device according to claim 1, is characterized in that, connected signal transmitting and receiving module corresponding to power line coupling circuit described in each is at least two.
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| CN201320425579.7U CN203445873U (en) | 2013-07-17 | 2013-07-17 | Multiphase power line carrier communication apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944610A (en) * | 2014-04-30 | 2014-07-23 | 杭州再灵电子科技有限公司 | Signal access device based on three-phase electric PLC (programmable logic controller) |
| CN104682557A (en) * | 2015-01-26 | 2015-06-03 | 天津金盾科技发展有限公司 | Intelligent SPD (Surge Protective Device) monitoring system |
| CN105915267A (en) * | 2016-04-15 | 2016-08-31 | 贵州大学 | Power line carrier device for measurement and control system and control method thereof |
| CN107104704A (en) * | 2017-06-12 | 2017-08-29 | 杭州快越科技有限公司 | A kind of electric power network element |
-
2013
- 2013-07-17 CN CN201320425579.7U patent/CN203445873U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944610A (en) * | 2014-04-30 | 2014-07-23 | 杭州再灵电子科技有限公司 | Signal access device based on three-phase electric PLC (programmable logic controller) |
| CN104682557A (en) * | 2015-01-26 | 2015-06-03 | 天津金盾科技发展有限公司 | Intelligent SPD (Surge Protective Device) monitoring system |
| CN105915267A (en) * | 2016-04-15 | 2016-08-31 | 贵州大学 | Power line carrier device for measurement and control system and control method thereof |
| CN107104704A (en) * | 2017-06-12 | 2017-08-29 | 杭州快越科技有限公司 | A kind of electric power network element |
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Address after: 200235 Shanghai city Xuhui District Longcao Road No. 299 Tianhua Information Technology Park Building 2 floor A block 5 Patentee after: SHANGHAI EASTSOFT MICROELECTRONICS Co.,Ltd. Address before: 200235 Shanghai city Xuhui District Longcao Road No. 299 Tianhua Information Technology Park Building 2 floor A block 5 Patentee before: SHANGHAI HAIER INTEGRATED CIRCUIT Co.,Ltd. |
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