CN112886993A - Platform district HPLC communication device - Google Patents
Platform district HPLC communication device Download PDFInfo
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- CN112886993A CN112886993A CN202110103524.3A CN202110103524A CN112886993A CN 112886993 A CN112886993 A CN 112886993A CN 202110103524 A CN202110103524 A CN 202110103524A CN 112886993 A CN112886993 A CN 112886993A
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- 238000004891 communication Methods 0.000 title claims abstract description 50
- 238000004128 high performance liquid chromatography Methods 0.000 title claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 54
- 230000008878 coupling Effects 0.000 claims abstract description 23
- 238000010168 coupling process Methods 0.000 claims abstract description 23
- 238000005859 coupling reaction Methods 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 230000003321 amplification Effects 0.000 claims abstract description 17
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 31
- 230000000630 rising effect Effects 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000002457 bidirectional effect Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/546—Combination of signalling, telemetering, protection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention discloses a platform area HPLC communication device, comprising: the device comprises a signal processing module, a modulation and demodulation module, a signal amplification module, a BPF module, a coupling circuit and an external interface; the signal processing module receives data information and/or instruction information through an external interface and processes the data information and/or the instruction information, and the modulation and demodulation module receives the data information and/or the instruction information after signal processing, modulates and demodulates the data information and/or the instruction information, and transmits the data information and/or the instruction information to a power line through the signal amplification module and the coupling circuit; the coupling circuit obtains data information and/or instruction information transmitted by the power line and transmits the data information and/or the instruction information to the modulation and demodulation module through the BPF module, and the signal processing module receives the data information and/or the instruction information after modulation and demodulation and sends the data information and/or the instruction information through the external interface. By adopting the broadband power carrier technology, the broadband power carrier communication system has the advantages of wide occupied frequency band, high data transmission rate, large data capacity, bidirectional transmission, convenience in installation and the like, can conveniently extend a power communication network to a low-voltage user side, and realizes data acquisition and control of a user electric meter.
Description
Technical Field
The invention relates to the technical field of power equipment communication, in particular to a platform area HPLC communication device.
Background
In recent years, with the advance of the construction of smart grids of national grid companies, power utilization information acquisition systems are gradually perfected. In an existing automatic meter reading system of an intelligent electric energy meter, 485 wiring, narrow-band low-frequency power line carrier or wireless communication modes are adopted from the electric energy meter, a collector and a concentrator. The greatest advantage of the above process involving PLC technology is that existing, sophisticated, and wide power lines can be utilized, which can greatly save communication engineering investment and construction time, and enable the access network to extend quickly to the place where the power lines are available. However, unlike the ordinary data communication line, the power line is originally intended for power transmission rather than data transmission, and for data communication, the channel is not ideal and is a very unstable transmission channel, which is characterized by serious noise interference, large time variation, serious signal attenuation, and the like.
Disclosure of Invention
The embodiment of the invention aims to provide a platform area HPLC communication device, which adopts a broadband power carrier technology, has the advantages of wide occupied frequency band, high data transmission rate, large data capacity, bidirectional transmission, no need of additionally laying a communication line, convenience in installation and the like, can conveniently extend a power communication network to a low-voltage user side, and realizes data acquisition and control of a user electric meter.
To solve the above technical problem, an embodiment of the present invention provides a station area HPLC communication apparatus, including: the device comprises a signal processing module, a modulation and demodulation module, a signal amplification module, a BPF module, a coupling circuit and an external interface;
the signal processing module receives data information and/or instruction information through the external interface and performs signal processing on the data information and/or instruction information, and the modulation and demodulation module receives the data information and/or instruction information after signal processing, performs modulation and demodulation on the data information and/or instruction information, and transmits the data information and/or instruction information to a power line through the signal amplification module and the coupling circuit;
the coupling circuit acquires the data information and/or the instruction information transmitted by the power line and transmits the data information and/or the instruction information to the modulation and demodulation module through the BPF module, and the signal processing module receives the data information and/or the instruction information after modulation and demodulation and transmits the data information and/or the instruction information through the external interface.
Further, the station HPLC communication apparatus further includes: a storage module;
the storage module is electrically connected with the signal processing module;
and the signal processing module sends the transmission signal data to the storage module for storage according to the type of the preset transmission signal data.
Further, the storage module is a Flash chip.
Further, the platform region HPLC communication device further comprises: a detection module;
the detection module is electrically connected with the signal processing module, monitors the running state of the signal processing module in real time, and sends an alarm signal and/or a control signal to the signal processing module when the signal processing module is abnormal.
Further, the detection module includes: a zero-crossing detection unit and an overcurrent detection unit;
the zero-crossing detection unit is used for detecting the falling edge time or the rising edge time of the power line sine wave;
the over-current detection unit is used for performing over-current detection on the power supply.
Further, the platform region HPLC communication device further comprises: a power supply module;
the power supply module is respectively electrically connected with the signal processing module, the modulation and demodulation module, the signal amplification module, the BPF module and the coupling circuit.
Further, the output voltage of the power supply module is 3.3V.
Further, the signal processing module and the modulation and demodulation module may be located in the same control chip.
Further, the model of the control chip is Hi 3911C.
The technical scheme of the embodiment of the invention has the following beneficial technical effects:
by adopting the broadband power carrier technology, the broadband power carrier technology has the advantages of wide occupied frequency band, high data transmission rate, large data capacity, bidirectional transmission, convenience in installation and the like, can conveniently extend a power communication network to a low-voltage user side, realizes data acquisition and control of a user electric meter, and further improves the efficiency and robustness of a power utilization information acquisition system.
Drawings
Fig. 1 is a schematic diagram of a station HPLC communication apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Fig. 1 is a schematic diagram of a station HPLC communication apparatus according to an embodiment of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a station area HPLC communication apparatus, including: the device comprises a signal processing module, a modulation and demodulation module, a signal amplification module, a BPF module, a coupling circuit and an external interface; the signal processing module receives data information and/or instruction information through an external interface and processes the data information and/or the instruction information, and the modulation and demodulation module receives the data information and/or the instruction information after signal processing, modulates and demodulates the data information and/or the instruction information, and transmits the data information and/or the instruction information to a power line through the signal amplification module and the coupling circuit; the coupling circuit obtains data information and/or instruction information transmitted by the power line and transmits the data information and/or the instruction information to the modulation and demodulation module through the BPF module, and the signal processing module receives the data information and/or the instruction information after modulation and demodulation and sends the data information and/or the instruction information through the external interface.
Specifically, the external interface is connected with the intelligent electric energy meter or the concentrator.
Further, the external interface is defined in a pin form according to the requirements of the customer form specification.
Further, the platform region HPLC communication device further comprises: and a storage module. The storage module is electrically connected with the signal processing module; and the signal processing module sends the transmission signal data to the storage module for storage according to the type of the preset transmission signal data.
Further, the storage module is a Flash chip.
And finishing the storage of data and parameters by a new flash product, and supporting the chip selection SFC _ CSN. The write protection pin SFC _ WPN is connected with a 10k omega resistor to be pulled down, and the content of Flash is guaranteed not to be rewritten in a non-operation state.
Specifically, the platform area HPLC communication apparatus further includes: and a detection module. The detection module is electrically connected with the signal processing module, monitors the running state of the signal processing module in real time, and sends an alarm signal and/or a control signal to the signal processing module when the signal processing module is abnormal.
Further, the detection module includes: a zero-crossing detection unit and an overcurrent detection unit. The zero-crossing detection unit is used for detecting the falling edge time or the rising edge time of the sine wave of the power line; the overcurrent detection unit is used for carrying out overcurrent detection on the power supply.
Specifically, the detection module includes zero cross detection unit and overflows the detection element, and zero cross detection module's effect does: in order to achieve better transmission effect, the chip sometimes needs to perform time-selective transmission, that is, a point with relatively small background noise on the power line sine wave is selected for carrier transmission. Therefore, the chip needs to pick up a power line sine wave, the optical coupler is conducted at the peak value of the sine wave, the amplified sine wave is input to a common GPIO pin of the chip, and the carrier wave is sent at the falling edge or the rising edge (the interference is minimum) by calculating the time delay. The overcurrent detection module has the functions of: in the process of sending data by the communication module, the power supply is subjected to overcurrent detection, so that overlarge current is prevented, the current limiting size can be adjusted according to the resistance value of the series resistor, and the CPU is informed of reducing the transmitting power through interruption.
Specifically, the platform area HPLC communication apparatus further includes: and a power supply module. The power supply module is respectively connected with the signal processing module, the modulation and demodulation module, the signal amplification module, the BPF module and the coupling circuit.
Optionally, the output voltage of the power supply module is 3.3V.
The DCDC circuit completes the conversion from 12V to 3.3V working voltage, the input withstand voltage is more than 30V, and the output capacity is more than 600 mA; a wire-wound power inductor is selected, the inductance value is 10 mu H, and the overcurrent capacity is more than 600 mA.
In a specific implementation manner of the embodiment of the present invention, the signal processing module and the modem module may be located in the same control chip.
Optionally, the model of the control chip is Hi 3911C.
Optionally, a variable high-pass filter is arranged inside the BPF module, so that a 100pF capacitor needs to be connected in series at the input end to form a high-pass with the inside of the chip. Meanwhile, the out-of-band inhibition is increased, and a circuit needs to be externally provided with 2M-9M of BPF (band pass Filter); wherein the 2M HPF (High Pass Filter) is of 5-order, and the 9M LPF (Low Pass Filter) is of 3-order.
Optionally, the signal amplification module receives the differential signal output by the modulation and demodulation module, and the differential signal is subjected to differential amplification and input to the coupling circuit for transmission. The LineDriver driving chip requires that the upper and lower limit cut-off frequency of the frequency response is larger than the output bandwidth of the differential pin, and the current output is larger than 450 mA. Pin protection: and a double-diode clamping protection circuit is added at the pin output end of the chip.
Specifically, the coupling circuit functions as: after the strong current part passes through the high-voltage connector to the module, a 4.7nF safety capacitor and a coupling coil are used for filtering 220V mains supply, and required 1 MHz-12 MHz signals are transmitted to the circuit board.
The working principle and the process of the platform area HPLC communication device are as follows:
when the device is operated, the whole unit, especially the signal processing module, is powered by the power supply module.
When in sending, the external intelligent electric energy meter or the concentrator transmits data information and/or instruction information to the signal processing module through the external interface part; the signal processing module carries out analysis processing on the received and/or analyzed data information and/or instruction information to be sent, carries out digital-to-analog conversion on the data information and/or instruction information to be sent to obtain an analog signal, and sends the analog signal to the modulation and demodulation module; the modulation and demodulation module is internally provided with an encapsulated OFDM modulation and coding algorithm, OFDM is modulated to 1536 carriers with the frequency bandwidth of 2-12MHz, and the signals are filtered and subjected to self-adaptive power amplification by the analog front end of the signal amplification module and then loaded to a power line by a coupling circuit for transmission.
Correspondingly, 1536 carrier signals which are modulated to 2-12MHz frequency bandwidth by OFDM on the power line are extracted from the power line communication interface during receiving, the signals are transmitted to the BPF module through the coupling circuit to be subjected to filtering processing, then are sent to the modulation and demodulation module to be subjected to demodulation processing, and are sent to the processing module to be analyzed and subjected to analog-to-digital conversion, and the signals are restored into original commands or data which are returned to an external intelligent electric energy meter or a concentrator through an external interface.
For more important parameters and data, the technical scheme in the embodiment of the invention can utilize a certain storage rule to load the parameters and the data into the storage module, and simultaneously, the operation process of the data processing module is monitored by the detection module, so that the normal operation of the system and the sending quality of signals are ensured.
Compared with low-voltage narrow-band carrier communication, the broadband carrier communication occupies a wide frequency band, less interference is caused on a power line, the communication reliability is higher, the stability and the safety are better, the data capacity is large, and bidirectional full-duplex rapid communication is realized. Through the test application of the scheme, the result shows that the communication distance can reach about 2km under the condition of good communication environment, the communication peak rate of a data physical layer can reach 14Mbit/s, the error rate reaches 10-9 levels, good anti-interference performance and anti-multipath attenuation performance are shown in power line carrier communication, the working frequency range is 2-12MHz, the static power consumption is less than or equal to 250mW, the dynamic power consumption is less than or equal to 1.35W, the average power consumption is less than or equal to 280mW, and the requirement of a modern power utilization information acquisition system can be completely met.
The invention can be applied to single-phase and three-phase intelligent electric energy meters and concentrators as a broadband carrier communication module and can also be used as independent acquisition equipment for data acquisition and communication through different external information switching interfaces and form specifications.
The embodiment of the invention aims to protect a platform area HPLC communication device, which comprises: the device comprises a signal processing module, a modulation and demodulation module, a signal amplification module, a BPF module, a coupling circuit and an external interface; the signal processing module receives data information and/or instruction information through an external interface and processes the data information and/or the instruction information, and the modulation and demodulation module receives the data information and/or the instruction information after signal processing, modulates and demodulates the data information and/or the instruction information, and transmits the data information and/or the instruction information to a power line through the signal amplification module and the coupling circuit; the coupling circuit obtains data information and/or instruction information transmitted by the power line and transmits the data information and/or the instruction information to the modulation and demodulation module through the BPF module, and the signal processing module receives the data information and/or the instruction information after modulation and demodulation and sends the data information and/or the instruction information through the external interface. The technical scheme has the following effects:
the broadband power carrier technology is adopted, the broadband power carrier technology has the advantages of wide occupied frequency band, high data transmission rate, large data capacity, bidirectional transmission, no need of laying a communication line additionally, convenience in installation and the like, and the power communication network can be conveniently extended to a low-voltage user side to realize data acquisition and control of a user electric meter.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. A bench top HPLC communication apparatus, comprising: the device comprises a signal processing module, a modulation and demodulation module, a signal amplification module, a BPF module, a coupling circuit and an external interface;
the signal processing module receives data information and/or instruction information through the external interface and performs signal processing on the data information and/or instruction information, and the modulation and demodulation module receives the data information and/or instruction information after signal processing, performs modulation and demodulation on the data information and/or instruction information, and transmits the data information and/or instruction information to a power line through the signal amplification module and the coupling circuit;
the coupling circuit acquires the data information and/or the instruction information transmitted by the power line and transmits the data information and/or the instruction information to the modulation and demodulation module through the BPF module, and the signal processing module receives the data information and/or the instruction information after modulation and demodulation and transmits the data information and/or the instruction information through the external interface.
2. The bench area HPLC communication apparatus of claim 1, further comprising: a storage module;
the storage module is electrically connected with the signal processing module;
and the signal processing module sends the transmission signal data to the storage module for storage according to the type of the preset transmission signal data.
3. The bench area HPLC communication apparatus of claim 2,
the storage module is a Flash chip.
4. The bench area HPLC communication apparatus of claim 1, further comprising: a detection module;
the detection module is electrically connected with the signal processing module, monitors the running state of the signal processing module in real time, and sends an alarm signal and/or a control signal to the signal processing module when the signal processing module is abnormal.
5. The bench area HPLC communication apparatus of claim 4,
the detection module comprises: a zero-crossing detection unit and an overcurrent detection unit;
the zero-crossing detection unit is used for detecting the falling edge time or the rising edge time of the power line sine wave;
the over-current detection unit is used for performing over-current detection on the power supply.
6. The bench area HPLC communication apparatus of claim 1, further comprising: a power supply module;
the power supply module is respectively electrically connected with the signal processing module, the modulation and demodulation module, the signal amplification module, the BPF module and the coupling circuit.
7. The bench area HPLC communication apparatus of claim 6,
the output voltage of the power supply module is 3.3V.
8. The bench area HPLC communication apparatus of claim 1,
the signal processing module and the modulation and demodulation module can be located in the same control chip.
9. The bench area HPLC communication apparatus of claim 8,
the model of the control chip is Hi 3911C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110103524.3A CN112886993A (en) | 2021-01-26 | 2021-01-26 | Platform district HPLC communication device |
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| CN202110103524.3A CN112886993A (en) | 2021-01-26 | 2021-01-26 | Platform district HPLC communication device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204965A (en) * | 2021-12-06 | 2022-03-18 | 深圳瑞祺科技有限公司 | Telecommunication control gateway and communication method |
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|---|---|---|---|---|
| KR20040047289A (en) * | 2002-11-29 | 2004-06-05 | 엘지전자 주식회사 | A Communication Modem for Power Line Carrier |
| CN204614199U (en) * | 2015-05-15 | 2015-09-02 | 国网冀北节能服务有限公司 | A kind of power line carrier data communication apparatus |
| CN105389968A (en) * | 2015-12-21 | 2016-03-09 | 南京新联电子股份有限公司 | Electric line broadband carrier communication module for low voltage centralization meter reading terminal |
| CN105703802A (en) * | 2016-02-29 | 2016-06-22 | 中电装备山东电子有限公司 | Power line broadband carrier communication device |
| CN112068068A (en) * | 2020-09-28 | 2020-12-11 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Error out-of-tolerance automatic detection system for electric energy meter in transformer area |
-
2021
- 2021-01-26 CN CN202110103524.3A patent/CN112886993A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040047289A (en) * | 2002-11-29 | 2004-06-05 | 엘지전자 주식회사 | A Communication Modem for Power Line Carrier |
| CN204614199U (en) * | 2015-05-15 | 2015-09-02 | 国网冀北节能服务有限公司 | A kind of power line carrier data communication apparatus |
| CN105389968A (en) * | 2015-12-21 | 2016-03-09 | 南京新联电子股份有限公司 | Electric line broadband carrier communication module for low voltage centralization meter reading terminal |
| CN105703802A (en) * | 2016-02-29 | 2016-06-22 | 中电装备山东电子有限公司 | Power line broadband carrier communication device |
| CN112068068A (en) * | 2020-09-28 | 2020-12-11 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Error out-of-tolerance automatic detection system for electric energy meter in transformer area |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204965A (en) * | 2021-12-06 | 2022-03-18 | 深圳瑞祺科技有限公司 | Telecommunication control gateway and communication method |
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Application publication date: 20210601 |