CN106330265A - Power line wideband carrier wave meter reading system - Google Patents
Power line wideband carrier wave meter reading system Download PDFInfo
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- CN106330265A CN106330265A CN201610841699.3A CN201610841699A CN106330265A CN 106330265 A CN106330265 A CN 106330265A CN 201610841699 A CN201610841699 A CN 201610841699A CN 106330265 A CN106330265 A CN 106330265A
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- bandwidth carrier
- electric energy
- energy meter
- carrier module
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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
- H04B3/544—Setting up communications; Call and signalling arrangements
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
Abstract
The invention discloses a power line wideband carrier wave meter reading system. A concentrator broadband carrier wave module is inserted into a concentrator; a first watt-hour meter wideband carrier wave module, a second watt-hour meter wideband carrier wave module and a third watt-hour meter wideband carrier wave module are inserted into an watt-hour meter; the A-phase of the concentrator broadband carrier wave module is connected with the first watt-hour meter wideband carrier wave module, the second watt-hour meter wideband carrier wave module and the third watt-hour meter wideband carrier wave module; the B-phase of the concentrator broadband carrier wave module is connected with a fourth watt-hour meter wideband carrier wave module, a fifth watt-hour meter wideband carrier wave module and a sixth watt-hour meter wideband carrier wave module; the C-phase of the concentrator broadband carrier wave module is connected with a seventh watt-hour meter wideband carrier wave module, an eighth watt-hour meter wideband carrier wave module and a ninth watt-hour meter wideband carrier wave module; and data are transmitted among the concentrator broadband carrier wave module and the watt-hour meter wideband carrier wave modules through power lines. The power line wideband carrier wave meter reading system has the advantages of high reliability, high real-time performance and high anti-interference ability; the maximum speed of the system can achieve 10Mbps. The high usability of the system can be realized at any time and in any environment.
Description
Technical field
The invention belongs to bandwidth carrier reading technique field, be more particularly to a kind of power wire broadband carrier kilowatt meter reading-out system.
This system copies and accepts user power utilization data for power department automatic remote, issues the electricity charge and step price, long-range to electric supply meter
The functions such as switching on.
Background technology
Traditional manual metering exists wastes time and energy, the shortcomings such as meter reading efficiency is low.And Automatic meter reading system is intelligent grid
Data on electric supply meter are acquired, and are uploaded to the system of power department.Expense control ammeter demand charge sending system is
The prepayment electric expense that user is paid by intelligent grid is issued to the system of user charge control ammeter.Can kilowatt meter reading-out system promptly and accurately
Data feedback on electric supply meter is related to the safety and economic operation problem of whole electrical network to power department.And take control ammeter and use
In the prepayment electric expense that electricity charge sending system in family more the to be paid user ammeter being issued to user promptly and accurately, otherwise can make
The serious consequence becoming user to hand over the electricity charge but to have no access to electricity, makes the image of power supply department be severely impacted.Therefore kilowatt meter reading-out system
And expense control ammeter electricity charge sending system is indispensable important component part during whole intelligent grid is built.Traditional checking meter is
System mostly is wireless kilowatt meter reading-out system and power line narrow band carrier kilowatt meter reading-out system.Due to the own characteristic of radio communication, radio meter register system
Unite by weather and make the topography and geomorphology of land used and shelter be affected.At bad weather, such as heavy rain, heavy snow etc. and shelter ratio
In the case of more, the signal attenuation of radio communication is very big, and transmitting distance significantly shortens, thus has a strong impact on radio meter register
The reliability of system.The unreliable problem of radio communication to be solved, can only by strengthen ammeter wireless module transmitting power and
Encryption lengthens the transmitting antenna of ammeter wireless module.And the transmitting power strengthening ammeter wireless module can exceed National Industrial and letter
The radio in breathization portion is about the management requirement launching power.The transmitting antenna of encryption and lengthening ammeter wireless module can make
Antenna is easily by artificial damage, if communication efficiency can be worse after antenna damages.In power line narrow band carrier kilowatt meter reading-out system, it is narrow
Frequency range with carrier signal is 3KHZ to 500KHZ, and the noise on current China distribution wire is substantially in the frequency of hundreds of K
Scope.Therefore, when the load on electric lines of force is the heaviest, narrowband carrier signal is that transmission range can contract significantly by the biggest interference
Short, have a strong impact on the real-time of data transmission.
Summary of the invention
In order to solve the problems referred to above that prior art exists, the invention provides a kind of power wire broadband carrier and check meter and be
System, the features such as reliability is high, real-time, and capacity of resisting disturbance is strong, these features are the transmission speed of electrically-based line bandwidth carrier
Degree is fast, and maximum speed is up to 10Mbps.Power wire broadband carrier bandwidth of operation is 2MHZ to 30MHZ.Away from domestic distribution noise
Scope, avoids main noise interference.Be capable of at any time with the high availability under any environment.
In order to realize above-mentioned purpose, the present invention uses techniques below measure:
A kind of power wire broadband carrier kilowatt meter reading-out system, it by concentrator bandwidth carrier module, the first electric energy meter bandwidth carrier module,
Second electric energy meter bandwidth carrier module, the 3rd electric energy meter bandwidth carrier module, the 4th electric energy meter bandwidth carrier module, the 5th electric energy
Table bandwidth carrier module, the 6th electric energy meter bandwidth carrier module, the 7th electric energy meter bandwidth carrier module, the 8th electric energy meter broadband carry
Mode block, the 9th electric energy meter bandwidth carrier module composition.It is characterized in that: on concentrator, insert concentrator bandwidth carrier mould
Block, inserts the first electric energy meter bandwidth carrier module, the second electric energy meter bandwidth carrier module, the 3rd electric energy meter broadband on electric energy meter
Carrier module, the A phase of concentrator bandwidth carrier module carries with the first electric energy meter bandwidth carrier module, the second electric energy meter broadband respectively
Mode block and the 3rd electric energy meter bandwidth carrier module are connected, by power line transmission data between them.Concentrator bandwidth carrier
The B phase of module respectively with the 4th electric energy meter bandwidth carrier module, the 5th electric energy meter bandwidth carrier module and the 6th electric energy meter broadband
Carrier module is connected, by power line transmission data between them.The C phase of concentrator bandwidth carrier module respectively with the 7th electric energy
Table bandwidth carrier module, the 8th electric energy meter bandwidth carrier module are connected with the 9th electric energy meter bandwidth carrier module, logical between them
Cross power line transmission data.One concentrator bandwidth carrier module needs by all of ammeter bandwidth carrier mould under electric power and its
Block communicates, and gathers the data in ammeter.Described concentrator bandwidth carrier module sets up power wire broadband carrier route network, concentrates
Device bandwidth carrier module is as the central node of power wire broadband carrier route network, and electric energy meter bandwidth carrier module is as network
In relay nodes and leafy node.
Described power wire broadband carrier route network indicates two by introducing received signal strength weight parameter size
The stability of transmission between electric energy meter bandwidth carrier module, selects the connection of received signal strength weight parameter maximum as every two
Connection between individual electric energy meter bandwidth carrier module, then makes concentrator bandwidth carrier module to each electric energy meter bandwidth carrier
The shortest path of module, the most again setting up power wire broadband carrier route network is all at the upper electricity once set up
Path is attempted on the basis of power line bandwidth carrier route network.
Described concentrator bandwidth carrier module includes power module, bandwidth carrier processing module, FLSAH memory module and coupling
Closing filtration module, power module, FLSAH memory module and coupling filtration module are all connected with bandwidth carrier processing module.Power supply
Module is for providing DC source to whole concentrator bandwidth carrier module, and FLSAH memory module is used for storing concentrator broadband
The Various types of data of carrier module, the modulation that coupling filtration module sends broadband carrier signal for bandwidth carrier processing module is conciliate
Adjust the broadband carrier signal received.Bandwidth carrier processing module is the core of whole concentrator bandwidth carrier module, is used for sending,
Resolve the data of all kinds of transmission.
Described electric energy meter bandwidth carrier module include power module, bandwidth carrier processing module, EEPROM memory module and
Coupling filtration module, power module, EEPROM memory module and coupling filtration module are all connected with bandwidth carrier processing module.Electricity
Source module is for providing DC source to whole electric energy meter bandwidth carrier module, and EEPROM memory module is used for storing electric energy meter width
With the Various types of data of carrier module, coupling filtration module for bandwidth carrier processing module send broadband carrier signal modulation and
The broadband carrier signal that demodulation receives.Bandwidth carrier processing module is the core of whole electric energy meter bandwidth carrier module, for sending out
Send, resolve the data of all kinds of transmission.
Power module in described concentrator bandwidth carrier module provides power supply, electric energy meter for concentrator bandwidth carrier module
Power module in bandwidth carrier module provides power supply for electric energy meter bandwidth carrier module, in described concentrator bandwidth carrier module
Power module and electric energy meter bandwidth carrier module in power module provide be all inverted after DC source.
The present invention compared with prior art, has the following advantages and effect:
1. introduce this concept of received signal strength weight parameter.For judging the quality of link, two electric energy meter bandwidth carriers
When carrying out data transmission between module, if received signal strength weight parameter is the biggest, show two electric energy meter bandwidth carrier moulds
Transmission between block is the most stable, and jamproof ability is the strongest.When setting up power wire broadband carrier route network, the most only
Ensure it is connection between each two bandwidth carrier ammeter module, also will be by comparing the size of received signal strength weight parameter
Making between each two electric energy meter bandwidth carrier module is strong ties, and anti-interference is best.
2. meeting between each two electric energy meter bandwidth carrier module under the precondition of strong ties, making concentrator broadband carry
Mode block is to the shortest path of each electric energy meter bandwidth carrier module, so from concentrator bandwidth carrier module to electric energy meter broadband
When transmitting data between carrier module, data volume is minimum, and the relays power table bandwidth carrier module of process is minimum, transmits more steady
Fixed.
3. the most again setting up power wire broadband carrier route network after is all at the upper electric lines of force once set up
Attempt path on the basis of bandwidth carrier route network, time so can be greatly shortened, improve establishment broadband over power line and carry
The efficiency of ripple route network, such that it is able to repeatedly safeguard power wire broadband carrier route network every day, makes network more stable.
Due to the fact that and have employed the scheme that above-mentioned three kinds of methods combine, make by concentrator bandwidth carrier module and electric energy
The power wire broadband carrier that table bandwidth carrier module is set up is checked meter network intelligence, strong, efficient.Greatly improve electric power live width
High reliability with carrier meter reading system and practicality.Thus ensure that power wire broadband carrier kilowatt meter reading-out system at any time and is appointed
High availability under what environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of power wire broadband carrier kilowatt meter reading-out system of the present invention.
Wherein: 1-concentrator bandwidth carrier module, 2-the first electric energy meter bandwidth carrier module, 3-the second electric energy meter
Bandwidth carrier module, 4-the 3rd electric energy meter bandwidth carrier module, 5-the 4th electric energy meter bandwidth carrier module, 6-the 5th electric energy
Table bandwidth carrier module, the 7, the 6th electric energy meter bandwidth carrier module, 8-the 7th electric energy meter bandwidth carrier module, the 9, the 8th electric energy
Table bandwidth carrier module, 10-the 9th electric energy meter bandwidth carrier module.
Fig. 2 is the structured flowchart of concentrator bandwidth carrier module.
Fig. 3 is the structured flowchart of electric energy meter bandwidth carrier module.
Fig. 4 is the workflow diagram of concentrator bandwidth carrier module.
Fig. 5 be electric energy meter bandwidth carrier module workflow diagram.
Detailed description of the invention
Embodiment 1:
According to Fig. 1, a kind of power wire broadband carrier kilowatt meter reading-out system, it is by concentrator bandwidth carrier module the 1, first electric energy meter
Bandwidth carrier module the 2, second electric energy meter bandwidth carrier module the 3, the 3rd electric energy meter bandwidth carrier module 4, the 4th electric energy meter broadband
Carrier module the 5, the 5th electric energy meter bandwidth carrier module the 6, the 6th electric energy meter bandwidth carrier module the 7, the 7th electric energy meter bandwidth carrier
Module the 8, the 8th electric energy meter bandwidth carrier module the 9, the 9th electric energy meter bandwidth carrier module 10 forms.It is characterized in that: concentrating
Insert concentrator bandwidth carrier module 1 on device, electric energy meter inserts first electric energy meter bandwidth carrier module the 2, second electric energy meter
Bandwidth carrier module the 3, the 3rd electric energy meter bandwidth carrier module 4, the A phase of concentrator bandwidth carrier module 1 respectively with the first electric energy
Table bandwidth carrier module the 2, second electric energy meter bandwidth carrier module 3 is connected, between them with the 3rd electric energy meter bandwidth carrier module 4
By power line transmission data.The B phase of concentrator bandwidth carrier module 1 respectively with the 4th electric energy meter bandwidth carrier module the 5, the 5th
Electric energy meter bandwidth carrier module 6 is connected with the 6th electric energy meter bandwidth carrier module 7, by power line transmission data between them.
The C phase of concentrator bandwidth carrier module 1 respectively with the 7th electric energy meter bandwidth carrier module the 8, the 8th electric energy meter bandwidth carrier module 9
It is connected with the 9th electric energy meter bandwidth carrier module 10, by power line transmission data between them.One concentrator bandwidth carrier
Module needs, by all of ammeter bandwidth carrier module communication under electric power and its, to gather the data in ammeter.Described concentrator
Bandwidth carrier module sets up power wire broadband carrier route network, and concentrator bandwidth carrier module is as power wire broadband carrier road
By the central node of network, electric energy meter bandwidth carrier module is as the relay nodes in network and leafy node.Concentrator is with slotting
The concentrator bandwidth carrier module entered on concentrator carries as an entirety, electric energy meter and the electric energy meter broadband inserted in electric energy meter
Mode block is as an entirety.One concentrator and the concentrator bandwidth carrier module management inserted on concentrator N number of electric energy
Table and the electric energy meter bandwidth carrier module inserted in electric energy meter, each electric energy meter and the electric energy meter bandwidth carrier inserted in electric energy meter
Module is all independent equality relative to the concentrator bandwidth carrier module on concentrator and insertion concentrator.They are the most independent
Power wire broadband carrier communication is passed through with concentrator bandwidth carrier module.
Described wherein concentrator is the concentrator meeting the arbitrary producer of national grid standard, such as Jiangsu Lin Yang electronics share
The DJGZ23-TLY2210 type concentrator of company limited.
Described wherein concentrator bandwidth carrier module is to meet the Wuhan Science and Technology Ltd. of RISESUN of national grid standard
Concentrator bandwidth carrier module, model is TXZX13-DCZM12-RS01 type.
Described wherein electric energy meter is the electric energy meter meeting the arbitrary producer of national grid standard, as the finite instrument that continues is permitted in Henan
Company DDZY566-Z type single-phase charge-controlled intelligent electric meter.
Described wherein electric energy meter bandwidth carrier module is to meet the Wuhan Science and Technology Ltd. of RISESUN of national grid standard
Electric energy meter bandwidth carrier module, model is TXZX13-DCZM12-RS02 type.
Such as Fig. 2, concentrator bandwidth carrier module includes power module, bandwidth carrier processing module, FLSAH memory module
With coupling filtration module.Power module, FLSAH memory module and coupling filtration module are all connected with bandwidth carrier processing module.
Power module is for providing DC source to whole concentrator bandwidth carrier module, and FLSAH memory module is used for storing concentrator
The Various types of data of bandwidth carrier module, coupling filtration module sends the modulation of broadband carrier signal for bandwidth carrier processing module
The broadband carrier signal received with demodulation.Bandwidth carrier processing module is the core of whole concentrator bandwidth carrier module, is used for
Send, resolve the data of all kinds of transmission.
Such as Fig. 3, electric energy meter bandwidth carrier module includes power module, bandwidth carrier processing module, EEPROM store mould
Block and coupling filtration module.Power module, EEPROM memory module and coupling filtration module are all with bandwidth carrier processing module even
Connect.Power module is for providing DC source to whole electric energy meter bandwidth carrier module, and EEPROM memory module is used for storing electricity
The Various types of data of energy table bandwidth carrier module, coupling filtration module sends broadband carrier signal for bandwidth carrier processing module
The broadband carrier signal that modulation and demodulation receive.Bandwidth carrier processing module is the core of whole electric energy meter bandwidth carrier module,
For sending, resolve the data of all kinds of transmission.
A kind of power wire broadband carrier kilowatt meter reading-out system includes electric energy meter, electric energy meter bandwidth carrier module, concentrator and concentration
Device bandwidth carrier module, described electric energy meter bandwidth carrier module is enclosed in electric energy meter, and described concentrator bandwidth carrier module fills
Enter in concentrator, on the electric lines of force of the distribution network that a concentrator and multiple ammeters are all connected to electric company.They it
Between by electric lines of force utilize bandwidth carrier transmit data.One concentrator bandwidth carrier module needs by electric power lower all with it
The communication of ammeter bandwidth carrier module, gather the data in ammeter.Described concentrator bandwidth carrier module sets up broadband over power line
Carrier wave route network, concentrator bandwidth carrier module is as the central node of power wire broadband carrier route network, electric energy meter width
With carrier module as the relay nodes in network and leafy node.
Described power wire broadband carrier route network indicates two by introducing received signal strength weight parameter size
The stability of transmission between electric energy meter bandwidth carrier module, selects the connection of received signal strength weight parameter maximum as every two
Connection between individual electric energy meter bandwidth carrier module, then makes concentrator bandwidth carrier module to each electric energy meter bandwidth carrier
The shortest path of module, the most again setting up power wire broadband carrier route network is all at the upper electricity once set up
Path is attempted on the basis of power line bandwidth carrier route network.
Described concentrator bandwidth carrier module includes power module, bandwidth carrier processing module, FLSAH memory module and coupling
Closing filtration module, power module, FLSAH memory module and coupling filtration module are all connected with bandwidth carrier processing module.
Described electric energy meter bandwidth carrier module include power module, bandwidth carrier processing module, EEPROM memory module and
Coupling filtration module, power module, EEPROM memory module and coupling filtration module are all connected with bandwidth carrier processing module.
Power module in described concentrator bandwidth carrier module provides power supply, electric energy meter for concentrator bandwidth carrier module
Power module in bandwidth carrier module provides power supply for electric energy meter bandwidth carrier module, in described concentrator bandwidth carrier module
Power module and electric energy meter bandwidth carrier module in power module provide be all inverted after DC source.
For convenience of description concentrator bandwidth carrier module and the workflow of electric energy meter bandwidth carrier module and their set up
Power wire broadband carrier is checked meter the process of route network, and concentrator bandwidth carrier module is referred to as central node, N number of electric energy meter width
Band carrier module is referred to as leafy node.As shown in Figure 4, Figure 5, after central node powers on, bandwidth carrier processing module is deposited from FLASH
Storage unit reads the information of all leafy nodes and sets up the received signal strength weight parameter threshold value of route network.When
After Centroid receives networking instruction, when carrying out brand-new networking, first the net state that enters of each child node can be set to false as, and
Each statistical value of current networking state is reset to zero.Each leaf node, as the module of an independent operating, powers on
After from EEPROM memory module, read relevant configuration parameter.Address parameter and networking received signal strength power including oneself
Weight parameter threshold level.Each leafy node can serve as via node and destination node.Networking commands is sent by Centroid,
Packet, after receiving data, is resolved by each leaf node, determines oneself by comparing the destination address in data
It is to carry out forward command as via node, or as destination node, Centroid is replied.The life that child node receives
Make destination address in frame with the address of oneself consistent time, at this moment also need to judge that whether received signal strength weight parameter is at door
In the range of limit.Because the size of received signal strength weight parameter value, signal during bandwidth carrier communication before reflecting at 2
Power, the network formed after the most just decide networking is the strongest reliably.The most just affect follow-up ammeter data to copy and accept, with
And paying electric charge issues success rate.After child node receives data when networking, real-time capture one can reflect contemporary broadband
The received signal strength weight parameter value that carrier signal is strong and weak, this real-time received signal strength weight parameter value meeting and networking
Threshold value compares, and when the most real-time received signal strength weight parameter value is more than networking threshold value, just thinks this group
Footpath, networking obtains to be passed through.
It is to travel through all of child node, when finding through said process that central node sets up the process of route network
During the path of a part of child node, can save it in routing table, and this routing table is carried out field intensity size sequence, field intensity
Before the routing iinformation of big child node comes, the basis that will preferentially route as other child node of lookup, and travel through and will continue
Continuous, from routing table, take out each path, the child node not yet networked in antithetical phrase node set travels through again, until will
All of child node joins in network.
The process of central node building network uses the networking mode of depth-first, joins in received signal strength weight
Under the constraint of number thresholding, the routed path that each child node finds is the shortest, i.e. the jumping figure through via node is most
May lack, make in whole network, the uploading of data assign can more fast and reliable, more safety and stability, thus form one
Brief effective, but do not lose the network of safety and stability.
The situation of quickly networking, is that the primary network carried out on the basis of upper once networking is safeguarded, first in routing table
All paths carry out the route of depth-first ordering, i.e. shortest path, come foremost, and the Liang Tiaolu that path width is identical
Footpath, then before the path that field intensity is big comes.Then from routing table, take out each paths verify, be verified then this
Path is still effective, and during authentication failed, then can begin attempt to seek from Centroid using this child node as the object not networked
Look for new path.Without finding, then based on the path in the routing table having arranged sequence, carry out route and attempt, directly
To being added in routing table.
Claims (3)
1. a power wire broadband carrier kilowatt meter reading-out system, it is by concentrator bandwidth carrier module (1), the first electric energy meter bandwidth carrier
Module (2), the second electric energy meter bandwidth carrier module (3), the 3rd electric energy meter bandwidth carrier module (4), the 4th electric energy meter broadband carry
Mode block (5), the 5th electric energy meter bandwidth carrier module (6), the 6th electric energy meter bandwidth carrier module (7), the 7th electric energy meter broadband
Carrier module (8), the 8th electric energy meter bandwidth carrier module (9), the 9th electric energy meter bandwidth carrier module (10) composition, its feature exists
In: on concentrator, insert concentrator bandwidth carrier module (1), electric energy meter inserts the first electric energy meter bandwidth carrier module
(2), the second electric energy meter bandwidth carrier module (3), the 3rd electric energy meter bandwidth carrier module (4), concentrator bandwidth carrier module (1)
A phase respectively with the first electric energy meter bandwidth carrier module (2), the second electric energy meter bandwidth carrier module (3) and the 3rd electric energy meter width
Band carrier module (4) be connected, the B phase of concentrator bandwidth carrier module (1) respectively with the 4th electric energy meter bandwidth carrier module (5),
5th electric energy meter bandwidth carrier module (6) is connected with the 6th electric energy meter bandwidth carrier module (7), concentrator bandwidth carrier module
(1) C phase respectively with the 7th electric energy meter bandwidth carrier module (8), the 8th electric energy meter bandwidth carrier module (9) and the 9th electric energy meter
Bandwidth carrier module (10) is connected.
A kind of power wire broadband carrier kilowatt meter reading-out system the most according to claim 1, it is characterised in that: described concentrator broadband
Carrier module (1) includes power module, bandwidth carrier processing module, FLSAH memory module and coupling filtration module, power supply mould
Block, FLSAH memory module and coupling filtration module are all connected with bandwidth carrier processing module.
A kind of power wire broadband carrier kilowatt meter reading-out system the most according to claim 1, it is characterised in that: the first described electric energy
Table bandwidth carrier module (2), the second electric energy meter bandwidth carrier module (3), the 3rd electric energy meter bandwidth carrier module (4) include power supply
Module, bandwidth carrier processing module, EEPROM memory module and coupling filtration module, power module, EEPROM memory module and
Coupling filtration module is all connected with bandwidth carrier processing module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610841699.3A CN106330265B (en) | 2016-09-22 | 2016-09-22 | A kind of power wire broadband carrier kilowatt meter reading-out system |
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| CN201610841699.3A CN106330265B (en) | 2016-09-22 | 2016-09-22 | A kind of power wire broadband carrier kilowatt meter reading-out system |
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| CN106330265B CN106330265B (en) | 2019-01-18 |
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| CN110943759A (en) * | 2019-11-12 | 2020-03-31 | 国家电网有限公司信息通信分公司 | Electric power communication link data checking method based on depth-first search algorithm |
| CN112748391A (en) * | 2020-12-25 | 2021-05-04 | 深圳市中创电测技术有限公司 | Electric energy meter online fault detection method and system based on electric power broadband carrier communication |
| CN112748391B (en) * | 2020-12-25 | 2024-02-09 | 深圳市中创电测技术有限公司 | Electric energy meter online fault detection method and system based on power broadband carrier communication |
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