CN107610439A - A kind of split type 4G communicators for power information acquisition system - Google Patents
A kind of split type 4G communicators for power information acquisition system Download PDFInfo
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- CN107610439A CN107610439A CN201710897943.2A CN201710897943A CN107610439A CN 107610439 A CN107610439 A CN 107610439A CN 201710897943 A CN201710897943 A CN 201710897943A CN 107610439 A CN107610439 A CN 107610439A
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Abstract
The present invention is a kind of split type 4G communicators for power information acquisition system, its structure includes communication signal relay unit, signal transmission medium, distal end 4G data processing communication units, and wherein signal output/input of communication signal relay unit connects by the way that signal transmission medium is corresponding with the signal input/output terminal of distal end 4G data processing communication units.Advantages of the present invention:Compared with the 4G communication modules of common power information acquisition terminal, split type 4G communicators can spin off 4G communication units from terminal body, applied to basement, underground garage, electric well etc. because wireless mobile signal does not cover or the area of weak output signal, distal end 4G data processing communication units are placed in the good region of signal, the distance of extension is up to 300 meters.
Description
Technical field
The present invention is the split type 4G communicators for power information acquisition system, belongs to power information acquisition technique neck
Domain.
Background technology
The acquisition terminal of electric power power information acquisition system at indivedual scenes such as：Basement, underground garage, electric well etc. due to
Wireless mobile signal does not cover or weak output signal, causes to communicate between terminal and main website not smooth, largely drags down
Local electric company integrally gathers success rate, have impact on system normal operation.To solve this problem, by 4G communication modules and terminal
Separation.Distal end 4G data processing communications unit is arranged on signal and receives preferable position, then the communication signal relay for passing through terminal
Unit, the communication to distal end 4G data processing communication units is realized, to solve the problems, such as long-distance radio communication.
The content of the invention
Proposed by the present invention is a kind of split type 4G communicators for power information acquisition system, and its purpose is intended to solve
The certainly telecommunication problem of the acquisition terminal of movable signal blind area.
The technical solution of the present invention：For the split type 4G communicators of power information acquisition system, its structure bag
Include communication signal relay unit, signal transmission medium, distal end 4G data processing communication units, wherein communication signal relay unit
Signal output/input is corresponding with the signal input/output terminal of distal end 4G data processing communication units by signal transmission medium
Connect.
Advantages of the present invention:Compared with the 4G communication modules of common power information acquisition terminal, split type 4G communications dress
4G communication units can be spun off from terminal body by putting, and be moved applied to basement, underground garage, electric well etc. due to wireless
Dynamic signal does not cover or the area of weak output signal, and distal end 4G data processing communication units are placed in the good region of signal, prolonged
The distance stretched is up to 300 meters.
Brief description of the drawings
Accompanying drawing 1 is the theory diagram of the split type 4G communicators for power information acquisition system.
Accompanying drawing 2 is the theory diagram of communication signal relay unit.
Accompanying drawing 3 is the theory diagram of distal end 4G data processing communication units.
Embodiment
Accompanying drawing 1 is compareed, for the split type 4G communicators of power information acquisition system, its structure is included in signal of communication
After unit, signal transmission medium, distal end 4G data processing communication units, the wherein signal output of communication signal relay unit/defeated
Enter end by the way that signal transmission medium is corresponding with the signal input/output terminal of distal end 4G data processing communication units to connect.
During work, split type 4G communicators separate 4G communication modules from body, move and believe in terminal location
4G communication modules are placed in the good region of signal in the case of number bad.This needs the long-range conveying of signal and power supply, wherein
Include boosting, the decompression conversion of power supply；The isolation conversion of signal of communication；Level conversion of signal of communication etc..It is first guarantee
The long-distance transmissions of power supply, the power voltage-drop loss of conveying circuit is reduced, supply voltage is brought up to 24V, and voltage from 5V
Accomplish to isolate, the pressure-resistant reachable 3000V between input/output terminal, distal end 4G data processing communication units can be prevented in adverse circumstances
（Such as thunderbolt）Cause the damage to terminal body.Secondly, signal of communication does isolation conversion process, and the serial ports to be communicated with 4G modules connects
Receive RXD, send TXD, reset signal RST to realize 300 meters of long-distance transmissions, and the stabilization that communicates is not disturbed, serial ports connects
Receipts RXD, transmission TXD, reset signal RST carry out Phototube Coupling by photoelectric coupled circuit, then change into energy at a distance by RS485 circuits
The RS485 level signals of transmission.24V power supply and serial ports receives RXD, sends TXD, reset signal RST RS485 level signals
By 300 meters of transmission medium（Such as cable, netting twine）It is transferred to distal end 4G data processing communication units.Distal end 4G data processings
24V voltage isolated bucks are produced 5V voltages to photoelectric coupled circuit, RS485 circuits, the power supply of 4G DCOM units by communication unit,
Receive serial ports reception RXD, transmission TXD, reset signal RST RS485 level signals and pass through RS485 circuit units and flashlight
Coupling isolated location changes into the serial ports to be communicated with 4G DCOM units and receives RXD, sends TXD, reset signal RST Transistor-Transistor Logic level
Signal, so as to realize the data interaction of communication.
Accompanying drawing 2, communication signal relay unit are compareed, its structure includes isolated from power boosting unit, signal light-coupled isolation list
Member, RS485 communication units, the first letter that the signal input port of optocoupler passes through RST access terminal interfaces wherein in isolated location
Number output port, the signal output port of optocoupler passes through G-RST and accesses RS485 communication units first in signal optocoupler isolated location
Signal input port；
The signal output port of RS485 communication units accesses the signal of signal optocoupler isolated location high speed optocoupler by G-RXD
Input port, the signal output port of signal optocoupler isolated location high speed optocoupler are defeated by the signal of RXD access terminal interfaces
Inbound port;
The signal that the secondary signal output port of terminal interface accesses signal optocoupler isolated location high speed optocoupler by TXD inputs
Port, the secondary signal that the signal output port of signal optocoupler isolated location high speed optocoupler passes through G-TXD access terminal interfaces
Input port;
The secondary signal output port of terminal interface passes through 5V plant-grid connection isolated from power boosting unit control sources port, electricity
Source isolation boosting cell voltage output port connects with the power input port of output interface;
The second output port that isolated from power boosting unit control source port passes through 5V plant-grid connection terminal interfaces;
The power input port that isolated from power boosting unit control source port passes through 24V power output interfaces;
Signal output/input port of RS485 communication units is corresponding with the signal input/output end port of output interface to connect.
The isolated from power boosting unit, 5V direct current signals are inputted, export the 24V direct current signals of isolation, isolation voltage is
3000V, 24V voltage are conveyed to long-range 4G data processing units by long medium and powered, while in the signal after passing through on unit
LDO exports 5V and powered to signal optocoupler isolated location and RS485 communication units；
The signal optocoupler isolated location, signal optocoupler isolated location receives the serial ports of isolation, sends and reset signal：RXD、
TXD, RST Transistor-Transistor Logic level signal change into G-RXD, G-TXD, G-RST of isolation Transistor-Transistor Logic level signal；
The RS485 communication units, G-RXD, G-TXD, G-RST Transistor-Transistor Logic level signal are changed into G-RXD, G-TXD, G-RST
RS485 signals.
During work, the serial ports of the complete paired terminal of communication signal relay unit receives RXD, sends TXD, reset signal isolation
Conversion, the boosting isolation work of 5V power supplys.Supply voltage is brought up to 24V from 5V by booster circuit, and voltage accomplish every
From the pressure-resistant reachable 3000V between input/output terminal.The serial ports of terminal body output receives RXD, sends TXD, reset signal
RST carries out Phototube Coupling by photoelectric coupled circuit, wherein reception RXD, transmission TXD pass through high speed photo coupling, reset signal RST is through too low
Fast optocoupler.The signal of optocoupler output changes into the RS485 level signals of energy long-distance transmissions, RS485 level by RS485 circuits again
Signal is together with 24V power supplys from some transmission medium to distal end 4G data processing communication units.
Accompanying drawing 3, distal end 4G data processing communication units are compareed, its structure includes insulating power supply unit, signal light-coupled isolation
Unit, RS485 communication units, 4G DCOM units, wherein
First signal output part of RS485 communication units is connected by G-RXD with the signal input part of input interface;
The secondary signal input of RS485 communication units is connected by G-RST with the secondary signal input of input interface,
The signal that the secondary signal output end of RS485 communication units accesses optocoupler in signal optocoupler isolated location by RST inputs
Port, the first signal input part phase of the signal output port and 4G DCOM units of optocoupler in signal optocoupler isolated location
Connect,
3rd signal input part of RS485 communication units accesses the signal of signal optocoupler isolated location high speed optocoupler by RXD
Output end, the 3rd signal output part of RS485 communication units access signal optocoupler isolated location high speed optocoupler by TXD
First signal input part,
The signal input/output terminal and the first signal of 4G DCOM units of signal optocoupler isolated location high speed optocoupler are defeated
Go out/input correspondingly connects;
Insulating power supply cell signal input connects the power output end of input interface, insulating power supply cell signal by 24V power supplys
Output connects LDO signal input part, and LDO the first signal output terminates the second of flashlight coupling isolated location high speed optocoupler
Signal input part, LDO secondary signal output end connect the secondary signal input of 4G DCOM units by 5V power supplys;
The secondary signal input/output end of 4G DCOM units is corresponding with the signal input/output terminal of Sim cards to connect.
The insulating power supply unit, input direct-current 24V, export 5V all the way by LDO and supplied to RS485 circuits
Electric exports by isolation DC/DC again isolates 5V to photoelectric coupled circuit part and the power supply of 4G module communication units circuit all the way.Every
From serial ports receive, send and reset signal：G-RXD, G-TXD, G-RST RS485 signals change into by RS485 communication units
G-RXD, G-TXD, G-RST Transistor-Transistor Logic level signal；
The signal optocoupler isolated location receives the serial ports of isolation, sends and reset signal：G-RXD, G-TXD, G-RST's
Transistor-Transistor Logic level signal changes into RXD, TXD, RST Transistor-Transistor Logic level signal, is finally output to 4G module communication units；4G module communication units
Member realizes the data exchange with mobile communications network.
Realize the data exchange with mobile communications network.
During work, distal end 4G data processing communications unit by 24V voltage isolated bucks, produce 5V voltages to photoelectric coupled circuit,
RS485 circuits, the power supply of 4G DCOM units, receive serial ports from transmission medium and receive RXD, transmission TXD, reset signal RST
RS485 level signals change into Transistor-Transistor Logic level signal by RS485 circuit units, then by light-coupled isolation unit carry out signal every
From, change into the serial ports to be communicated with 4G DCOM units and receive RXD, send TXD, reset signal RST Transistor-Transistor Logic level signal, from
And realize the data interaction of communication.
In power information acquisition system, many terminals are arranged in the blind area of movable signal, such as metallic shield case, larger
Factory building, basement, electric well etc., these places have a strong impact on collection success rate.Split type 4G communicators can communicate 4G
Unit is spun off from terminal body, and distal end 4G data processing communication units are placed in the good region of signal, extension away from
From up to 300 meters.Efficiently solve the problems, such as the terminal called in movable signal blind area.
Claims (10)
1. for the split type 4G communicators of power information acquisition system, it is characterized in that including communication signal relay unit, letter
Number transmission medium, distal end 4G data processing communication units, signal output/input of wherein communication signal relay unit pass through letter
Number transmission medium is corresponding with the signal input/output terminal of distal end 4G data processing communication units connects.
2. it is used for the split type 4G communicators of power information acquisition system as claimed in claim 1, it is characterized in that split type
When 4G communicators work, 4G communication modules are separated from body, in the case where terminal location movable signal is bad
4G communication modules are placed in the good region of signal;This needs the long-range conveying of signal and power supply, and which includes the liter of power supply
Pressure, decompression conversion；The isolation conversion of signal of communication；The level conversion of signal of communication;First to ensure the long-distance transmissions of power supply,
The power voltage-drop loss of conveying circuit is reduced, supply voltage is brought up to 24V from 5V, and voltage is accomplished to isolate, input and output
Pressure-resistant between end reaches 3000V, prevents distal end 4G data processing communications unit in adverse circumstances as thunderbolt is caused to terminal body
Damage;Secondly, signal of communication does isolation conversion process, the serial ports reception signal RXD that communicate with 4G modules, transmission signal TXD,
Reset signal RST, to realize 300 meters of long-distance transmissions, and the stabilization that communicates is not disturbed, and serial ports reception signal RXD, sends letter
Number TXD, reset signal RST carry out Phototube Coupling by photoelectric coupled circuit, then changed into by RS485 communication units can long-distance transmissions
RS485 level signals;24V power supply and serial ports receives RXD, sends TXD, reset signal RST RS485 level signals process
300 meters of transmission medium such as cable, netting twine, it is transferred to distal end 4G data processing communication units；Distal end 4G data processing communication lists
24V voltage isolated bucks are produced 5V voltages to signal optocoupler isolated location, RS485 communication units, 4G DCOM units by member
Power supply, receive serial ports reception signal RXD, transmission signal TXD, reset signal RST RS485 level signals and lead to by RS485
Letter unit and signal optocoupler isolated location change into the serial ports reception signal RXD to be communicated with 4G DCOM units, send signal
TXD, reset signal RST Transistor-Transistor Logic level signal, so as to realize the data interaction of communication.
3. the split type 4G communicators according to claim 1 for power information acquisition system, it is characterized in that communication
The single structure of signal relaying includes isolated from power boosting unit, signal optocoupler isolated location, RS485 communication units, wherein isolating
The signal input port of optocoupler passes through the first signal output port of RST access terminal interfaces, signal light-coupled isolation list in unit
The signal output port of optocoupler accesses RS485 the first signal input ports of communication unit by G-RST in member；
The signal output port of RS485 communication units accesses the signal of signal optocoupler isolated location high speed optocoupler by G-RXD
Input port, the signal output port of signal optocoupler isolated location high speed optocoupler are defeated by the signal of RXD access terminal interfaces
Inbound port;
The signal that the secondary signal output port of terminal interface accesses signal optocoupler isolated location high speed optocoupler by TXD inputs
Port, the secondary signal that the signal output port of signal optocoupler isolated location high speed optocoupler passes through G-TXD access terminal interfaces
Input port;
The secondary signal output port of terminal interface passes through 5V plant-grid connection isolated from power boosting unit control sources port, electricity
Source isolation boosting cell voltage output port connects with the power input port of output interface;
The second output port that isolated from power boosting unit control source port passes through 5V plant-grid connection terminal interfaces;
The power input port that isolated from power boosting unit control source port passes through 24V power output interfaces;
Signal output/input port of RS485 communication units is corresponding with the signal input/output end port of output interface to connect；
During work, the serial ports reception signal RXD of the complete paired terminal of communication signal relay unit, signal TXD, reset signal are sent
Isolation conversion, the boosting isolation work of 5V power supplys；Supply voltage is brought up to 24V from 5V by booster circuit, and voltage is done
To isolation, pressure-resistant between input/output terminal reaches 3000V；The serial ports reception signal RXD of terminal body output, send signal TXD,
Reset signal RST carries out Phototube Coupling by signal optocoupler isolated location, wherein reception signal RXD, sends signal TXD through too high
Fast optocoupler, reset signal RST pass through low speed optocoupler；The signal of optocoupler output changes into by RS485 communication units again can be remote
The RS485 level signals of transmission, RS485 level signals are together with 24V power supplys from some transmission medium to distal end 4G data processings
Communication unit.
4. the split type 4G communicators according to claim 3 for power information acquisition system, it is characterized in that described
Isolated from power boosting unit, 5V direct current signals are inputted, export the 24V direct current signals of isolation, isolation voltage 3000V, 24V voltage
Long-range 4G data processing units are conveyed to by long medium to power, while exports 5V to believing after passing through LDO on unit in the signal
Number light-coupled isolation unit and the power supply of RS485 communication units.
5. the split type 4G communicators according to claim 3 for power information acquisition system, it is characterized in that signal
Light-coupled isolation unit receives the serial ports of terminal, sends and reset signal：RXD, TXD, RST Transistor-Transistor Logic level signal change into isolation
G-RXD, G-TXD, G-RST Transistor-Transistor Logic level signal.
6. the split type 4G communicators according to claim 3 for power information acquisition system, it is characterized in that described
RS485 communication units, by serial ports reception, transmission and the reset signal of isolation：G-RXD, G-TXD, G-RST Transistor-Transistor Logic level signal
Change into G-RXD, G-TXD, G-RST RS485 signals.
7. the split type 4G communicators according to claim 1 for power information acquisition system, it is characterized in that described
Distal end 4G data processing communication units, its structure include insulating power supply unit, signal optocoupler isolated location, RS485 communication units,
4G DCOM units, wherein
First signal output part of RS485 communication units is connected by G-RXD with the signal input part of input interface;
The secondary signal input of RS485 communication units is connected by G-RST with the secondary signal input of input interface,
The signal that the secondary signal output end of RS485 communication units accesses optocoupler in signal optocoupler isolated location by RST inputs
Port, the first signal input part phase of the signal output port and 4G DCOM units of optocoupler in signal optocoupler isolated location
Connect,
3rd signal input part of RS485 communication units accesses the signal of signal optocoupler isolated location high speed optocoupler by RXD
Output end, the 3rd signal output part of RS485 communication units access signal optocoupler isolated location high speed optocoupler by TXD
First signal input part,
The signal input/output terminal and the first signal of 4G DCOM units of signal optocoupler isolated location high speed optocoupler are defeated
Go out/input correspondingly connects;
Insulating power supply cell signal input connects the power output end of input interface, insulating power supply cell signal by 24V power supplys
Output connects LDO signal input part, and LDO the first signal output terminates the second of flashlight coupling isolated location high speed optocoupler
Signal input part, LDO secondary signal output end connect the secondary signal input of 4G DCOM units by 5V power supplys;
The secondary signal input/output end of 4G DCOM units is corresponding with the signal input/output terminal of Sim cards to connect.
8. it is used for the split type 4G communicators of power information acquisition system as claimed in claim 7, it is characterized in that distal end 4G
During data processing communication cell operation, by 24V voltage isolated bucks, produce 5V voltages and lead to signal optocoupler isolated location, RS485
Believe unit, the power supply of 4G DCOM units, receive serial ports reception signal RXD from transmission medium, send signal TXD, reset letter
Number RST RS485 level signals change into Transistor-Transistor Logic level signal by RS485 communication units, then enter by signal optocoupler isolated location
Row signal isolation, change into the serial ports reception signal RXD to be communicated with 4G DCOM units, send signal TXD, reset signal RST
Transistor-Transistor Logic level signal, so as to realize the data interaction of communication.
9. the split type 4G communicators according to claim 7 for power information acquisition system, it is characterized in that described
Insulating power supply unit, input direct-current 24V, it is defeated by isolation DC/DC again to RS485 circuits power supply to export 5V all the way by LDO
Go out to isolate 5V all the way and powered to photoelectric coupled circuit part and 4G module communication units circuit.
10. the split type 4G communicators according to claim 7 for power information acquisition system, it is characterized in that described
Signal optocoupler isolated location receives the serial ports of isolation, sends and reset signal：G-RXD, G-TXD, G-RST Transistor-Transistor Logic level letter
RXD, TXD, RST Transistor-Transistor Logic level signal number are changed into, is finally output to 4G module communication units；4G modules communication unit realize with
The data exchange of mobile communications network.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1428943A (en) * | 2001-12-28 | 2003-07-09 | 株式会社日立制作所 | Multi-point radio transmission relay system and wirless device |
| EP1507372A1 (en) * | 2003-08-15 | 2005-02-16 | Sony Ericsson Mobile Communications Japan, Inc. | Forwarding of acknowledged traffic volume in HSDPA UMTS |
| CN101915737A (en) * | 2010-08-03 | 2010-12-15 | 武汉科技大学 | Detection instrument for detecting concentration of CO gas |
| CN203535780U (en) * | 2013-05-31 | 2014-04-09 | 江苏林洋电子股份有限公司 | Communication system capable of improving the signal intensity of AMR (Automatic Message Recording) terminal |
| CN203596099U (en) * | 2013-12-18 | 2014-05-14 | 国家电网公司 | Electricity utilization information collection system |
| CN104378137A (en) * | 2014-12-11 | 2015-02-25 | 长沙威胜信息技术有限公司 | Repeater and information transmission method thereof |
| CN104467907A (en) * | 2014-12-11 | 2015-03-25 | 长沙威胜信息技术有限公司 | Repeater and information transmission method and communication module hardware ID identification method of repeater |
| CN104504876A (en) * | 2014-11-18 | 2015-04-08 | 国网上海市电力公司 | Split-type power utility information collector |
| CN105024747A (en) * | 2015-08-19 | 2015-11-04 | 长沙威胜信息技术有限公司 | Signal relay equipment of power utilization information acquisition terminal |
| CN205566663U (en) * | 2016-01-18 | 2016-09-07 | 国网山东省电力公司烟台供电公司 | A 4G communication module for power consumption information acquisition terminal |
| CN106504500A (en) * | 2016-11-28 | 2017-03-15 | 国网安徽省电力公司阜阳供电公司 | Multifunctional remote wireless communication relay set based on remote radio communication relaying technique |
| CN107026678A (en) * | 2017-05-26 | 2017-08-08 | 青岛东软载波科技股份有限公司 | A kind of broadband power line carrier communication circuit based on OFDM mode modulations |
-
2017
- 2017-09-28 CN CN201710897943.2A patent/CN107610439A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1428943A (en) * | 2001-12-28 | 2003-07-09 | 株式会社日立制作所 | Multi-point radio transmission relay system and wirless device |
| EP1507372A1 (en) * | 2003-08-15 | 2005-02-16 | Sony Ericsson Mobile Communications Japan, Inc. | Forwarding of acknowledged traffic volume in HSDPA UMTS |
| CN101915737A (en) * | 2010-08-03 | 2010-12-15 | 武汉科技大学 | Detection instrument for detecting concentration of CO gas |
| CN203535780U (en) * | 2013-05-31 | 2014-04-09 | 江苏林洋电子股份有限公司 | Communication system capable of improving the signal intensity of AMR (Automatic Message Recording) terminal |
| CN203596099U (en) * | 2013-12-18 | 2014-05-14 | 国家电网公司 | Electricity utilization information collection system |
| CN104504876A (en) * | 2014-11-18 | 2015-04-08 | 国网上海市电力公司 | Split-type power utility information collector |
| CN104378137A (en) * | 2014-12-11 | 2015-02-25 | 长沙威胜信息技术有限公司 | Repeater and information transmission method thereof |
| CN104467907A (en) * | 2014-12-11 | 2015-03-25 | 长沙威胜信息技术有限公司 | Repeater and information transmission method and communication module hardware ID identification method of repeater |
| CN105024747A (en) * | 2015-08-19 | 2015-11-04 | 长沙威胜信息技术有限公司 | Signal relay equipment of power utilization information acquisition terminal |
| CN205566663U (en) * | 2016-01-18 | 2016-09-07 | 国网山东省电力公司烟台供电公司 | A 4G communication module for power consumption information acquisition terminal |
| CN106504500A (en) * | 2016-11-28 | 2017-03-15 | 国网安徽省电力公司阜阳供电公司 | Multifunctional remote wireless communication relay set based on remote radio communication relaying technique |
| CN107026678A (en) * | 2017-05-26 | 2017-08-08 | 青岛东软载波科技股份有限公司 | A kind of broadband power line carrier communication circuit based on OFDM mode modulations |
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