CN108880575A - A kind of charging pile net covering communication system and method based on NB-IOT - Google Patents
A kind of charging pile net covering communication system and method based on NB-IOT Download PDFInfo
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- CN108880575A CN108880575A CN201810784231.4A CN201810784231A CN108880575A CN 108880575 A CN108880575 A CN 108880575A CN 201810784231 A CN201810784231 A CN 201810784231A CN 108880575 A CN108880575 A CN 108880575A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of charging pile net covering communication system and method based on NB-IOT, communication module, central controller, NB-IOT, which are received, including charging pile sender unit, NB-IOT sends communication module and electric quantity signal reception terminal, the quantity of the charging pile sender unit is at least one, and the quantity of the electric quantity signal reception terminal is identical as the quantity of charging pile sender unit and corresponds；The charging pile sender unit and NB-IOT receive communication module and pass through wireless connection, the NB-IOT receives communication module, central controller, NB-IOT and sends communication module and be sequentially connected, and the NB-IOT sends communication module and electric quantity signal receives terminal and passes through wireless connection.The present invention knows charge capacity situation convenient for user at any time, the time of using cars is arranged convenient for user, and improves the service efficiency of charging pile, the resource of charging pile is avoided to be occupied for a long time, the service efficiency of communal facility resource is improved, the time for waiting in line charging of other users is also reduced.
Description
Technical field
The present invention relates to meanss of communication, and in particular to a kind of charging pile net covering communication system and side based on NB-IOT
Method.
Background technique
Electric vehicle alternating-current charging pile refers to and is installed in public place and residential area parking lot or charging station and hands over
The connection of galvanic electricity net, provides the power supply unit of AC power source for electric automobile and vehicle-mounted charger, uses conduction pattern for vehicle-mounted
The electric car of charger provides man-machine interactive interface and alternating-current charging interface, and has the special of corresponding monitoring and protection function
Use device.Have monitoring running state, fault state monitoring, charging time-sharing measurement, historical data metering and store function.And it is electric
Electrical automobile charging is similar to mobile phone and charges, and needs the time that electricity could be substituted the bad for the good, the electric car charging time is by the specified function of charging pile
Rate, battery management system and battery capacity codetermine, and in general, direct-current charging post needs to charge for 30 minutes 80%,
After 80%, to protect cell safety, charging current gradually become smaller, and is flushed to 100% time and is slightly extended, exchanging trickle charge electricity
Stake then needs 6-8 hours, and the electric car universal time is not grown, and the charging technique of charging pile is not unified at home, and electric
The electrical automobile charging time is codetermined by charging pile rated power, battery management system and battery capacity, and therefore, electric car fills
Electricity time be specifically how long, can not determine at all, and automobile charging with mobile phone charging be it is different, mobile phone charge
Process is nearby to do other things in side waiting or during mobile phone charging by user, can check that mobile phone charges at any time
Reach how many, and electric car charging belongs in parking lot charging, user can not fill electricity in parking lot waiting electric car
It is full, and user does other things after leaving, can not determine that electric car is charged on earth at all does not have, and leads to the opportunity driven very
Hardly possible determines, delays user time；The quantity of charging pile is seldom simultaneously, after the electric car of user is charged and without coming in time
It picks up the car, causes charging pile occupied for a long time, cause the wasting of resources of charging pile.
Summary of the invention
The present invention is in order to solve the above-mentioned technical problem, and it is an object of the present invention to provide a kind of charging pile net covering based on NB-IOT is logical
Believe system and method, know charge capacity situation at any time convenient for charge user, arranges the time of using cars convenient for user, and improve and fill
The service efficiency of electric stake avoids the resource of charging pile from being occupied for a long time.
The present invention is achieved through the following technical solutions：
A kind of charging pile net covering communication system based on NB-IOT, including charging pile sender unit, NB-IOT connect
It receives communication module, central controller, NB-IOT and sends communication module and electric quantity signal reception terminal, the charging pile signal is sent
The quantity of device is at least one, and the quantity that the electric quantity signal receives terminal is identical as the quantity of charging pile sender unit
And it corresponds；The charging pile sender unit and NB-IOT receive communication module and pass through wireless connection, the NB-IOT
It receives communication module, central controller, NB-IOT to send communication module and be sequentially connected, the NB-IOT sends communication module and electricity
Amount reception signal terminal passes through wireless connection；
It includes first antenna, the first limiter, the first RF switch, first band choosing that the NB-IOT, which receives communication module,
Select filter, the first low-noise amplifier, the second limiter and the first NB-IOT module, the first antenna, the first limiter,
First RF switch, first band selection filter, the first low-noise amplifier, the second limiter and the first NB-IOT module according to
Secondary connection；
It includes the 2nd NB-IOT module, the second gain module, second band selection filter that the NB-IOT, which sends communication device,
Wave device, the second RF switch and the second antenna, the 2nd NB-IOT module, the second gain module, second band selection filtering
Device, the second RF switch and the second antenna are sequentially connected；
The first NB-IOT module is connect with central controller respectively with the 2nd NB-IOT module.
Electric automobile charging pile belongs to large-scale charging equipment, and charging pile belongs to communal facility more, and electric car charging needs
Time could be full of, and the time of electric car charging is determined jointly by charging pile rated power, battery management system and battery capacity
It is fixed, and electric car popularizes the time soon, and the specification disunity of the charging pile of electric car, it is specified which results in charging piles
The difference of power, battery management system and battery capacity is all larger, and which results in the charging time of electric car greatly
It is uncertain.Automobile user can not aside wait during for electric car charging as mobile phone charging,
When the charge condition that electric car charging can not be checked after automobile user leaves charging pile, lead to electric car
Full of be for automobile user it is unknown, leverage the trip arrangement of user；Simultaneously as electric car is universal
Time, the Quantity of charging pile was limited soon, when user cannot hold electric car when can be fully charged when, meeting
The time for habitually extending pick-up causes the other users for needing to charge which results in the service efficiency of charging pile is low
It can only wait in line or find other charging stations, cause charge efficiency low.Charging pile sender unit is arranged in the present invention, fills
The connection of the charging system of electric stake sender unit and charging pile, charging pile sender unit are used to detect the charging of charging pile
Signal, charging signals include electricity, charged state and the time full of needs of charging, and charging pile sender unit will fill
Electric signal receives communication module by being wirelessly transmitted to NB-IOT, and NB-IOT receives communication module, central controller and NB-IOT
It sends communication module and is all disposed within charging station supervision interior, NB-IOT receives communication module and receives charging pile sender unit
Charging signals after be sent to central controller, central controller analyzes charging signals, if charge information is abnormal, fills
The staff in power station can act in time, prevent from causing any property loss and security risk；Central controller believes charging simultaneously
It number is transmitted to NB-IOT and sends communication module, NB-IOT, which sends communication module charge information is sent to electric quantity signal, to be received eventually
End, it is the portable device of Rechargeable vehicle user that electric quantity signal, which receives terminal, receives charging when electric quantity signal receives terminal
Charge capacity, charged state and the time full of needs are displayed for a user after signal.The present invention sends dress using charging pile signal
It sets, NB-IOT receives communication module, central controller, NB-IOT send communication module and electric quantity signal receives terminal for charging
Stake, charging station monitoring room and charge user link together, and the staff of charging station monitoring room is not only made to understand charging pile
Charged state, also allow charge user to understand the charge condition of electric car at any time, know charge capacity shape at any time convenient for user
Condition arranges the time of using cars convenient for user, and improves the service efficiency of charging pile, and the resource of charging pile is avoided to be accounted for for a long time
With the service efficiency of raising communal facility resource also reduces the time for waiting in line charging of other users.
Further, it includes third antenna, third limiter, third RF switch, that the electric quantity signal, which receives terminal,
Three band selecting filters, third low-noise amplifier, the 4th limiter, third microcontroller, display, the third day
Line, third limiter, third RF switch, third band selecting filter, third low-noise amplifier, the 4th limiter,
Three microcontrollers, display are sequentially connected.
Further, the charging pile sender unit includes the 4th NB-IOT module, the 4th gain module, the 4th frequency
Band selection filter, the 4th RF switch and the 4th antenna, the 4th NB-IOT module, the 4th gain module, the 4th frequency band
Selection filter, the 4th RF switch and the 4th antenna are sequentially connected.
Further, the first NB-IOT module and the 2nd NB-IOT module are all made of MDM9206.
The characteristics of NB-IOT module is, using wireless telecommunications, support the poor throughput terminal of magnanimity, low power consumption and low cost,
Outdoor big covering, indoor penetration capacity are promoted, this has been just met for the demand of existing large-scale charging station.Based on NB-IOT module
Information powerful transmission, the information that multiple information transmitting apparatus are sent can be docked.The charging pile quantity of charging station is more, makes
Data transmission is realized with NB-IOT module, can reduce power consumption and cost.
Further, first band selection filter and second band selection filter include level-one filter,
Two-stage filter and three-level filtering device.The frequency range of level-one filter is 108MHZ-180MHZ, and the frequency range of two-stage filter is
400MHZ-470MHZ, the frequency range of three-level filtering device are 750MHZ-820MHZ.
A kind of charging pile net covering communication means based on NB-IOT, including：
Step 1, the charging signals of charging pile are received communication module to NB-IOT and sent by charging pile sender unit；
Step 2, setting signal amplitude threshold X in communication module is received in NB-IOT；When the charging signals received are more than
When signal amplitude thresholding X, NB-IOT receives communication module and stores the frequency of the charging signals into local storage, works as reception
To signal be less than signal amplitude thresholding X when, NB-IOT receives communication module and the charging signals is transmitted to central controller；
Step 3, central controller carries out signal modulate to the charging signals received, and analyzes and obtain charging letter
Number charging pile sender unit identification code；
Step 4, central controller obtains phase therewith according to the identification code of the charging pile sender unit of the charging signals
Corresponding electric quantity signal receives the identification code of terminal, and central controller controls NB-IOT sends communication module to be believed to corresponding electricity
It number receives terminal and sends a positioning signal, electric quantity signal, which receives terminal and receives, sends communication mould to NB-IOT after the positioning signal
Block feeds back a notification signal；
Step 5, the difference in voltage amplitude, phase and frequency that central controller is generated according to the notification signal received
Not Pan Ding signal the direction transmitted and the source of signal is positioned using time-of-arrival loaction；
Step 6, NB-IOT sends communication module and the charging signals received is transmitted to electric quantity signal reception terminal.
This method is applied to the charging pile more than quantity, and the quantity of charging pile is more, and the information content that single charging pile generates is less,
But a fairly large number of charging pile will generate many information content, although the total amount of these information content is few, use biography
The GPRS transmission of system, the bandwidth occupied is more, and transmission speed is slow, also takes up normal communication channel, and NB-IOT communication module
It just just can solve the above problem, the bandwidth occupied is few, and transmission speed is fast, is also not take up normal communication channel, just suitable
It is low for this informational capacity, but the situation more than information source.
This method can be in complicated electromagnetic environment, and the signal and electricity that charging pile sender unit is sent are believed
Number receiving the search of terminal received signal, intercepting and capturing or analysis processing becomes simple, can be supervised in real time to echo signal
Control and automatic search, can be according to the recognition result of signal, and the real-time or offline demodulation for completing signal obtains Information intension only
It is.
Further, in step 2, signal amplitude thresholding X includes two kinds of situations, and a kind of situation is signal amplitude thresholding X people
For setting, belong to definite value；Another situation is that signal amplitude thresholding X is that NB-IOT reception communication module is obtained using related algorithm
Self adaptive detection threshold belongs to underrange.
For signal amplitude thresholding using being manually set, flexibility is lower, but the letter that charging pile sender unit is sent
Number frequency be usually change it is little, using the resource that can be saved NB-IOT and receive communication device is manually set；This A Yong is certainly
Adapting to detection threshold can flexibly cope at the time of abnormal signal occurs in charging pile sender unit and other interference signals
When appearance, but a disadvantage is that occupying the resource that more NB-IOT receives communication device.
Further, NB-IOT communication module show that the related algorithm of self adaptive detection threshold is：
Wherein, C indicates that self adaptive detection threshold, P indicate false-alarm probability value, and L indicates random sequence
Length, l indicate the road l correlator, f indicate correlator total number.
Further, in step 3, the step of signal modulate：
Step 21, modulation type Resource selection；
Step 22, Signal Pretreatment and parameter extraction；
Step 23, the selection and extraction of characteristic of division；
Step 24, the selection and training of classifying rules.
According to the signal characteristic that charging pile sender unit is sent, modulation sample to be sorted is given in the central controller
Formula set is initially selected for the characteristic parameter of classification and the classifying rules of classifier, then from the communication of known modulation type
Characteristic ginseng value is extracted in sample of signal (training sample).Characteristic parameter training classifier of modulation type, knows known to these
Road classification output meets given error requirements, or is directly arranged by the statistical analysis (mean value, variance) to characteristic parameter and is divided
The decision threshold of class device or the parameter of classification function, complete the training stage of classifier.It can be improved after signal modulate pair
The accuracy of the source judgement of received signal, avoids the automobile user that the charge information of electric car is sent to mistake
In hand.
Compared with prior art, the present invention having the following advantages and benefits：The present invention is sent out using charging pile signal
Sending device, NB-IOT to receive, communication module, central controller, NB-IOT send communication module and electric quantity signal reception terminal will
Charging pile, charging station monitoring room and charge user link together, and not only understand the staff of charging station monitoring room and fill
The charged state of electric stake also allows charge user to understand the charge condition of electric car at any time, knows charging electricity at any time convenient for user
Amount situation arranges the time of using cars convenient for user, and improves the service efficiency of charging pile, avoids the resource of charging pile by for a long time
It occupies, improves the service efficiency of communal facility resource, also reduce the time for waiting in line charging of other users.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention；
Fig. 2 is that NB-IOT module of the present invention receives communication module structural schematic diagram；
Fig. 3 is that NB-IOT module of the present invention sends communication module structural schematic diagram；
Fig. 4 is that electric quantity signal of the present invention receives terminal structure schematic diagram；
Fig. 5 is charging pile sender unit structural schematic diagram of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment
As shown in Figure 1, a kind of charging pile net based on NB-IOT covers communication system, including charging pile signal sends dress
It sets, NB-IOT receives communication module, central controller, NB-IOT send communication module and electric quantity signal and receive terminal, described to fill
The quantity of electric stake sender unit is at least one, and the electric quantity signal receives the quantity of terminal and charging pile signal sends and fills
The quantity set is identical and corresponds；The charging pile sender unit receives communication module by wirelessly connecting with NB-IOT
It connects, the NB-IOT receives communication module, central controller, NB-IOT and sends communication module and be sequentially connected, the NB-IOT hair
It send communication module and electric quantity signal to receive terminal and passes through wireless connection；
As shown in Fig. 2, the NB-IOT receive communication module include first antenna, the first limiter, the first RF switch,
First band selection filter, the first low-noise amplifier, the second limiter and the first NB-IOT module, the first antenna,
First limiter, the first RF switch, first band select filter, the first low-noise amplifier, the second limiter and first
NB-IOT module is sequentially connected；
As shown in figure 3, it includes the 2nd NB-IOT module, the second gain module, second that the NB-IOT, which sends communication device,
Band selecting filter, the second RF switch and the second antenna, the 2nd NB-IOT module, the second gain module, the second frequency
Band selection filter, the second RF switch and the second antenna are sequentially connected；
The first NB-IOT module is connect with central controller respectively with the 2nd NB-IOT module.
As shown in figure 4, it includes third antenna, third limiter, third RF switch, third frequency that electric quantity signal, which receives terminal,
Band selection filter, third low-noise amplifier, the 4th limiter, third microcontroller, display, the third antenna, the
Three limiters, third RF switch, third band selecting filter, third low-noise amplifier, the 4th limiter, third micro-control
Device processed, display are sequentially connected.
As shown in figure 5, charging pile sender unit includes the 4th NB-IOT module, the 4th gain module, the 4th frequency band
Select filter, the 4th RF switch, the 4th antenna, the 4th NB-IOT module, the 4th gain module, the 4th frequency band selection
Filter, the 4th RF switch and the 4th antenna are sequentially connected.
First NB-IOT module and the 2nd NB-IOT module are all made of MDM9206.
It includes level-one filter, two-stage filter and three that first band, which selects filter and second band selection filter,
Grade filter.
Limiter uses RLM-63-2W+ chip in the present embodiment, and RF switch uses HMC7992 chip, low noise amplification
Device uses TQP3M9305, and gain module uses MGA30689.
A kind of charging pile net covering communication means based on NB-IOT, including：
Step 1, the charging signals of charging pile are received communication module to NB-IOT and sent by charging pile sender unit；
Step 2, setting signal amplitude threshold X in communication module is received in NB-IOT；When the charging signals received are more than
When signal amplitude thresholding X, NB-IOT receives communication module and stores the frequency of the charging signals into local storage, works as reception
To signal be less than signal amplitude thresholding X when, NB-IOT receives communication module and the charging signals is transmitted to central controller；
Step 3, central controller carries out signal modulate to the charging signals received, and analyzes and obtain charging letter
Number charging pile sender unit identification code；
Step 4, central controller obtains phase therewith according to the identification code of the charging pile sender unit of the charging signals
Corresponding electric quantity signal receives the identification code of terminal, and central controller controls NB-IOT sends communication module to be believed to corresponding electricity
It number receives terminal and sends a positioning signal, electric quantity signal, which receives terminal and receives, sends communication mould to NB-IOT after the positioning signal
Block feeds back a notification signal；
Step 5, the difference in voltage amplitude, phase and frequency that central controller is generated according to the notification signal received
Not Pan Ding signal the direction transmitted and the source of signal is positioned using time-of-arrival loaction；
Step 6, NB-IOT sends communication module and the charging signals received is transmitted to electric quantity signal reception terminal.
This method is applied to the charging pile more than quantity, and the quantity of charging pile is more, and the information content that single charging pile generates is less,
But a fairly large number of charging pile will generate many information content, although the total amount of these information content is few, use biography
The GPRS transmission of system, the bandwidth occupied is more, and transmission speed is slow, also takes up normal communication channel, and NB-IOT communication module
It just just can solve the above problem, the bandwidth occupied is few, and transmission speed is fast, is also not take up normal communication channel, just suitable
It is low for this informational capacity, but the situation more than information source.
Further, in step 2, signal amplitude thresholding X includes two kinds of situations, and a kind of situation is signal amplitude thresholding X people
For setting, belong to definite value；Another situation is that signal amplitude thresholding X is that NB-IOT reception communication module is obtained using related algorithm
Self adaptive detection threshold belongs to underrange.
For signal amplitude thresholding using being manually set, flexibility is lower, but the letter that charging pile sender unit is sent
Number frequency be usually change it is little, using the resource that can be saved NB-IOT and receive communication device is manually set；This A Yong is certainly
Adapting to detection threshold can flexibly cope at the time of abnormal signal occurs in charging pile sender unit and other interference signals
When appearance, but a disadvantage is that occupying the resource that more NB-IOT receives communication device.
Further, NB-IOT communication module show that the related algorithm of self adaptive detection threshold is：
Wherein, C indicates that self adaptive detection threshold, P indicate false-alarm probability value, and L indicates random sequence
Length, l indicate the road l correlator, f indicate correlator total number.
Further, in step 3, the step of signal modulate：
Step 21, modulation type Resource selection；
Step 22, Signal Pretreatment and parameter extraction；
Step 23, the selection and extraction of characteristic of division；
Step 24, the selection and training of classifying rules.
According to the signal characteristic that charging pile sender unit is sent, modulation sample to be sorted is given in the central controller
Formula set is initially selected for the characteristic parameter of classification and the classifying rules of classifier, then from the communication of known modulation type
Characteristic ginseng value is extracted in sample of signal (training sample).Characteristic parameter training classifier of modulation type, knows known to these
Road classification output meets given error requirements, or is directly arranged by the statistical analysis (mean value, variance) to characteristic parameter and is divided
The decision threshold of class device or the parameter of classification function, complete the training stage of classifier.It can be improved after signal modulate pair
The accuracy of the source judgement of received signal, avoids the automobile user that the charge information of electric car is sent to mistake
In hand.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of charging pile net based on NB-IOT covers communication system, which is characterized in that including charging pile sender unit,
NB-IOT receives communication module, central controller, NB-IOT and sends communication module and electric quantity signal reception terminal, the charging pile
The quantity of sender unit is at least one, and the electric quantity signal receives the quantity and charging pile sender unit of terminal
Quantity is identical and corresponds；The charging pile sender unit and NB-IOT receive communication module and pass through wireless connection, institute
It states NB-IOT reception communication module, central controller, NB-IOT to send communication module and be sequentially connected, the NB-IOT sends communication
Module and electric quantity signal receive terminal and pass through wireless connection；
It includes first antenna, the first limiter, the first RF switch, first band selection filter that the NB-IOT, which receives communication module,
Wave device, the first low-noise amplifier, the second limiter and the first NB-IOT module, the first antenna, the first limiter, first
RF switch, first band selection filter, the first low-noise amplifier, the second limiter and the first NB-IOT module successively connect
It connects；
The NB-IOT send communication device include the 2nd NB-IOT module, the second gain module, second band selection filter,
Second RF switch and the second antenna, the 2nd NB-IOT module, the second gain module, second band selection filter, the
Two RF switches and the second antenna are sequentially connected；
The first NB-IOT module is connect with central controller respectively with the 2nd NB-IOT module.
2. a kind of charging pile net based on NB-IOT according to claim 1 covers communication system, which is characterized in that described
It includes third antenna, third limiter, third RF switch, third band selecting filter, third that electric quantity signal, which receives terminal,
Low-noise amplifier, the 4th limiter, third microcontroller, display, the third antenna, third limiter, third radio frequency
Switch, third band selecting filter, third low-noise amplifier, the 4th limiter, third microcontroller, display successively connect
It connects.
3. a kind of charging pile net based on NB-IOT according to claim 1 covers communication system, which is characterized in that described
Charging pile sender unit includes the 4th NB-IOT module, the 4th gain module, the 4th band selecting filter, the 4th radio frequency
Switch, the 4th antenna, the 4th NB-IOT module, the 4th gain module, the 4th band selecting filter, the 4th RF switch
It is sequentially connected with the 4th antenna.
4. a kind of charging pile net based on NB-IOT according to claim 1 covers communication system, which is characterized in that described
First NB-IOT module and the 2nd NB-IOT module are all made of MDM9206.
5. a kind of charging pile net based on NB-IOT according to claim 1 covers communication system, which is characterized in that described
It includes level-one filter, two-stage filter and three-level filtering that first band, which selects filter and second band selection filter,
Device.
6. a kind of charging pile net based on NB-IOT covers communication means, which is characterized in that including：
Step 1, the charging signals of charging pile are received communication module to NB-IOT and sent by charging pile sender unit；
Step 2, setting signal amplitude threshold X in communication module is received in NB-IOT；When the charging signals received are more than signal
When amplitude threshold X, NB-IOT receives communication module and stores the frequency of the charging signals into local storage, when what is received
When signal is less than signal amplitude thresholding X, NB-IOT receives communication module and the charging signals is transmitted to central controller；
Step 3, central controller carries out signal modulate to the charging signals received, and analyzes and obtain the charging signals
The identification code of charging pile sender unit；
Step 4, central controller is corresponded according to the identification code of the charging pile sender unit of the charging signals
Electric quantity signal receive terminal identification code, central controller controls NB-IOT send communication module connect to corresponding electric quantity signal
It receives terminal and sends a positioning signal, electric quantity signal receives terminal and receives after the positioning signal that send communication module to NB-IOT anti-
Present a notification signal；
Step 5, the difference in voltage amplitude, phase and frequency that central controller is generated according to the notification signal received is sentenced
Determine the direction of signal transmitted and the source of signal is positioned using time-of-arrival loaction；
Step 6, NB-IOT sends communication module and the charging signals received is transmitted to electric quantity signal reception terminal.
7. a kind of charging pile net based on NB-IOT according to claim 6 covers communication means, which is characterized in that step
In 2, signal amplitude thresholding X includes two kinds of situations, and a kind of situation is that signal amplitude thresholding X is manually set, and belongs to definite value；It is another
Situation is that signal amplitude thresholding X is that NB-IOT reception communication module uses related algorithm to obtain self adaptive detection threshold, is belonged to not
Definite value.
8. a kind of charging pile net based on NB-IOT according to claim 7 covers communication means, which is characterized in that NB-
IOT communication module show that the related algorithm of self adaptive detection threshold is：
Wherein, C indicates that self adaptive detection threshold, P indicate false-alarm probability value, and L indicates the length of random sequence
Degree, l indicate that the road l correlator, f indicate total number of correlator.
9. a kind of charging pile net based on NB-IOT according to claim 6 covers communication means, which is characterized in that step
In 3, the step of signal modulate：
Step 21, modulation type Resource selection；
Step 22, Signal Pretreatment and parameter extraction；
Step 23, the selection and extraction of characteristic of division；
Step 24, the selection and training of classifying rules.
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