CN110213677A - Intelligent low-power consumption multi-functional energy table design method based on LoRa - Google Patents
Intelligent low-power consumption multi-functional energy table design method based on LoRa Download PDFInfo
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- CN110213677A CN110213677A CN201910595629.8A CN201910595629A CN110213677A CN 110213677 A CN110213677 A CN 110213677A CN 201910595629 A CN201910595629 A CN 201910595629A CN 110213677 A CN110213677 A CN 110213677A
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a kind of intelligent low-power consumption multi-functional energy table design method based on LoRa, including intelligent ammeter module, intellectual water meter module, intelligent gas meter module, LoRa radio frequency transmission module, LoRa gateway module and remote server module.LoRa data acquisition controller controls acquisition node and sends specified order to the communication module of multi-functional energy table module, then receive the data that multi-functional energy table returns, it is parsed and is transmitted to relay node with corresponding agreement, relay node transmits data to aggregation node again, the received multi-functional energy is uploaded to remote server with table data by LoRa outer net by aggregation node, it is parsed into useful information and is stored in database, and the state of each multi-functional energy table of access of intellectual monitoring, user can access inquiry to corresponding information in terminal.Using LoRa technology spreadability is wide, communication cost is low, efficient, real-time long-range the characteristics of reading data, this system realizes low-power consumption effect well.
Description
Technical field
The invention belongs to Internet of Things and the communications field, are related to a kind of multi-functional energy table of the intelligent low-power consumption based on LoRa
Design method.Suitable for residential quarter, factory, school etc. largely using the place of electricity, water and combustion gas.
Background technique
With whole world modernization, informationization, further speeding up for fast development is automated, the following energy is excessively unrestrained
The problems such as expense, gradually highlights.At the same time, Internet of Things has welcome an initiative epoch, and technology of Internet of things is rapidly sent out
Exhibition.Internet of Things is the important component of generation information technology, and the important development stage in " informationization " epoch.Internet of Things
Epoch, more and more objects access network, gradually realize " all things on earth interconnection " this bright prospects.On the basis of technology of Internet of things
On, energy Internet of Things enters booming period, energy Internet of Things be all kinds of intellectual technologies electricity consumption, with water, with combustion gas etc.
The combination of link can effectively solve energy waste, the problems such as model of energy management is chaotic.
Also the problem of energy excess waste is brought while the arrival of the internet of things era, under this background, " low-power consumption "
As the target pursued at this stage, the combination of low-consumption wireless technology and Internet of Things is extremely urgent.Low-power consumption wide area network LPWAN skill
Art accelerates Internet of Things in low-power consumption, large capacity, wide covering, low cost aspect as effective additional project of M2M connection
Development.A kind of long haul communication technology of the LoRa as LPWAN, solve traditional wireless sensor networks long transmission distance with it is low
The problem of power consumption cannot get both.LoRa is the low-power consumption local area network wireless standard of semtech company creation, and the name of LoRa is exactly
Remote-wireless electricity (Long Range Radio), is a kind of novel wireless communication technology, advanced band spectrum modulation skill is utilized
Art and encoding scheme increase link budget and better jamming performance, have to deep fading and Doppler frequency shift better
Stability, its maximum feature are exactly that the distance under same consumption conditions than the propagation of other wireless modes is farther, are realized low
Power consumption and at a distance unification, it expands 3-5 times than traditional twireless radio-frequency communication distance under same power consumption.
Remote meter reading has become the important component in smart grid, and traditional manual metering mode has quantity greatly, accidentally
The disadvantages of difference is big, and some energy are remote with table infield, some then need livewire work, and it is dangerous big, it is time-consuming and laborious, in addition to
It causes outside the waste of resource, in real-time, accuracy and application etc. all Shortcomings.It is realized using LoRa technology long-range
Not only spreadability is wide, communication cost is low for kilowatt meter reading-out system, can efficiently, it is long-range in real time read data, but also can also improve electric power,
Waterpower and fuel gas supply unit solve electricity, water, the dispersion of gas meter, flow meter distributed point, it is difficult to manage to the management regulation of meter reading business
The problem of reason is the ideal meter reading scheme of energy resource supply relevant unit.Remote collection data are handled, intellectual analysis is each
The state of multi-functional energy table is accessed, and is parsed into useful information, accesses and uses for all users.So at this stage, if
Count it is a kind of improved based on the multi-functional energy of intelligent low-power consumption of LoRa with table system working efficiency, guarantee service quality, reduce
Energy consumption is particularly important.
Summary of the invention
Technical problem: technical problem to be solved by the invention is to provide a kind of more function of intelligent low-power consumption based on LoRa
Energy energy table design method, this method is using LoRa technology spreadability is wide, communication cost is low, can efficiently, in real time
Long-range the characteristics of reading data, is applied in remote meter reading field, based on the communication standard of LoRa protocol stack, LoRa core is arranged
The working time of piece reduces power consumption, realizes good effect.By LoRa radio frequency transmission module to intelligent ammeter module, intelligence
Energy water meter module and intelligent gas meter module send specified order, the data that then reception intelligent multifunctional is returned with table, with phase
The agreement answered is parsed and is transmitted to LoRa gateway module, and LoRa gateway module is passed through LoRa after receiving information
Outer net uploads onto the server to carry out data parsing, by useful data storage to database.By to intelligent electric meter, intellectual water meter
With the remote centralized management of intelligent gas meter, the state of the multi-functional energy table of each access of intellectual analysis, and it is parsed into useful
Information, can not only improve working efficiency and guarantee service quality, energy consumption can also be reduced.
To realize that above-mentioned target, the technical solution that the present invention realizes are as follows:
A kind of intelligent low-power consumption multi-functional energy table design method based on LoRa, which is characterized in that including intelligence
It can meter module, intellectual water meter module, intelligent gas meter module, LoRa radio frequency transmission module, LoRa gateway module and long-range clothes
Business device module；
The intelligent ammeter module for recording user power utilization state, including control module, communication module, metering module,
Clock module, memory module, display module and power module；
The intellectual water meter module for recording user's water state, including control module, electromagnetic water valve, communication module,
Metering module, clock module, memory module, display module and power module；
The intelligent gas meter module is for recording user's combustion gas state, including control module, gas valve, communication mould
Block, metering module, clock module, memory module, display module and power module；
The LoRa radio frequency transmission module is for connecting multi-functional table module and LoRa gateway module, including acquisition section
Point, LoRa data acquisition controller and transfer bus；
The LoRa gateway module for connecting LoRa radio frequency transmission module and server module, including aggregation node, in
After node and LoRa outer net；
The remote server module includes equipment control service, data acquisition service and other services.
Intelligent low-power consumption multi-functional energy table design method according to the present invention based on LoRa, feature
It is, the LoRa radio frequency transmission module is by sending intelligent ammeter module, intellectual water meter module and intelligent gas meter module
Specified order then receives the data that intelligent multifunctional is returned with table, parsed with corresponding agreement and transmit to
LoRa gateway module, LoRa gateway module are uploaded onto the server it to carry out data solution by LoRa outer net after receiving information
Analysis, by useful data storage to database.
Intelligent low-power consumption multi-functional energy table design method according to the present invention based on LoRa, feature
It is, the processor unit of the intelligent ammeter module, intellectual water meter module and the control module in intelligent gas meter module
Using STM32F103 chip, communication module uses SX1278 as radio frequency transmission chip.
Intelligent low-power consumption multi-functional energy table design method according to the present invention based on LoRa, feature
It is, clock circuit DS1302 structure is used in the clock module.
Intelligent low-power consumption multi-functional energy table design method according to the present invention based on LoRa, feature
Be, the LoRa data acquisition controller in the LoRa radio frequency transmission module by power module, LoRaSX1278 radio-frequency module,
Control circuit module, jtag interface module and bus interface module composition.
Intelligent low-power consumption multi-functional energy table design method according to the present invention based on LoRa, feature
It is, the aggregation node and relay node in the LoRa gateway module are by power module, LoRaSX1278 radio-frequency module, JTAG
Interface module and bus interface module composition.
Intelligent low-power consumption multi-functional energy table design method according to the present invention based on LoRa, feature
It is, the transfer bus is RS-485 universal serial bus.
Intelligent low-power consumption multi-functional energy table design method according to the present invention based on LoRa, feature
It is, is used between intelligence table module, LoRa radio frequency transmission module, LoRa gateway module and each module of remote server
LoRa protocol stack establishes connection.
Intelligent low-power consumption multi-functional energy table design method according to the present invention based on LoRa, feature
It is, the communication mode is realized by sending command frame and replying the method for command frame, and command frame is respectively sent are as follows:
0x0100 (reads the multi-functional essential information with table), and 0x0101 (reads the current multi-functional status information with table), 0x0200
(reading multi-functional table this month usage amount), 0x0201 (read multi-functional table history usage amount), respectively reply command frame are as follows:
0x0110,0x0111,0x0210,0x0211.
Intelligent low-power consumption multi-functional energy table design method according to the present invention based on LoRa, feature
It is, the LoRa protocol stack includes RF Layer (less radio-frequency layer), PHY Layer (physical layer), MAC Layer (media
Access control layer) and Application Layer (application layer), by the transmitting and receiving of LoRa protocol realization LoRa data frame.Its
In, RF Layer is used to modulate the PHY frame in required RF carrier wave, and is transferred in the air, and PHY Layer is used to construct PHY frame,
MAC Layer is for constructing mac frame.
According to the invention intelligent low-power consumption multi-functional energy table design method based on LoRa, feature exists
Contain a upstream message and a downstream message in, the LoRa data frame packet, upstream message by terminal device by one or
Multiple gateways are sent to network service end, upstream message by lead code Preamble, packet header PHAD, packet header crc value PHAD_CRC,
Data PHYpayload and cyclic redundancy check composition, downstream message are sent to terminal device by network service end, and downstream message is by preceding
Leading code Preamble, packet header PHAD, packet header crc value PHAD_CRC and data PHYpayload composition.
The format of data frame packet according to the present invention, it is characterised in that the message transmission rate of LoRa protocol modulation
Are as follows:The transmission rate of symbol are as follows:The transmission time of symbol are as follows:Wherein, sf is spread spectrum
The factor, BW are modulation bandwidth.
As further improving and supplementing, multi-functional energy table system of the present invention to above-mentioned technical proposal
It is as follows that LoRa signal transmits and receives the function that process and each equipment are realized: intelligence table module, LoRa radio frequency transmission module,
Communication is based on LoRa protocol realization, the transmitting and receiving process of LoRa data between LoRa gateway module and each module of remote server
Realize the requirement of low-power consumption.Under transmission state, radio-frequency module only just will start when needing to send data, send stream
Journey are as follows: LoRa chip is constantly in standby mode before sending, after initialization module, first writes data into chip memory,
Then it is switched to transmission state by standby mode to send the modulation of LoRa data, one can be generated by being sent rear radio-frequency module
Secondary interruption is changed into standby mode by transmission state；In receive state, LoRa equipment can interior search at a given time period
Lead code Preamble in LoRa data frame can generate primary interruption, by connecing if do not searched within this period
Receipts state is switched to standby mode, if data receiver finishes, cyclic redundancy check can fail, and can equally generate primary interruption at this time,
Standby mode is switched to by reception state.This work and standby mutual switching working mode, greatly reduce power consumption.Intelligence
Can meter module, intellectual water meter module and intelligent gas meter module be arranged in community resident building, including in each module can be with
The communication module of LoRa radio frequency transmission module transfer data, the control module of each energy table normal work of control, acquisition are simultaneously counted
It calculates electricity consumption, water, the metering module of tolerance, control clock module, each energy of display that each energy table works by clock circuit
The power module worked normally with the display module of table data, the memory module of each energy table data of storage and to maintain equipment；
LoRa radio frequency transmission module is connect with the energy in residential building with table module by bus, when system works, the acquisition of LoRa data
Controller controls acquisition node and sends specified order to the communication module of multi-functional energy table module, then receives multi-functional energy
The data that source is returned with table are parsed with corresponding agreement and are transmitted to relay node, and relay node again sends out data
It is sent to aggregation node, the received multi-functional energy is uploaded to remote server with table data by LoRa outer net by aggregation node,
It is parsed into useful information and is stored in database, and the state of each multi-functional energy table of access of intellectual monitoring, user can be with
It accesses inquiry in terminal to corresponding information.
The beneficial effects of the present invention are:
1. the multi-functional energy with table system by LoRa technology introduce kilowatt meter reading-out system, using its spreadability is wide, communication cost is low,
Efficiently, the characteristic for remotely reading data in real time, reduces energy consumption and ensure that service quality is reliable, while LoRa is wireless
Communication system does not need operator, and system architecture is simple, so that networking is convenient.
2. the multi-functional energy in table system in control module, communication module, LoRa radio frequency transmission module and LoRa gateway
Etc. modules all employ can switching working mode low-power consumption LoRa chip, improve the service life of hardware device, availability is big
Big enhancing.
3. intelligent electric meter, water meter, gas meter, flow meter are integrated in a system in table system by the multi-functional energy, one is shared
LoRa network system so that multilist management more specification, be easy, further reduce system power dissipation, reduce the expense of user
And operation difficulty.
Detailed description of the invention
Fig. 1 multi-functional energy table system construction drawing of the present invention；
Fig. 2 LoRa low power consuming devices work flow diagram of the present invention；
Fig. 3 intelligent electric meter structural schematic diagram of the present invention；
Fig. 4 intellectual water meter structural schematic diagram of the present invention；
Fig. 5 intelligent gas meter structural schematic diagram of the present invention；
Fig. 6 relay node structural schematic diagram of the present invention；
Fig. 7 aggregation node structural schematic diagram of the present invention.
Specific embodiment
It is below with reference to attached drawing and specifically real in order to keep effect and the advantage of technical solution of the present invention more clear
Example is applied the intelligent low-power consumption multi-functional energy of the invention based on LoRa is described in detail with table design method.
Referring to Fig. 1, a kind of intelligent low-power consumption multi-functional energy table system structure based on LoRa of the invention, including occupy
The multi-functional energy in the people building table module (intelligent electric meter, intellectual water meter and intelligent gas meter 1), (acquisition of LoRa radio frequency transmission module
Node 2, LoRa data acquisition controller 3), LoRa gateway module (relay node 4, aggregation node 5, LoRa outer net 6) is long-range to take
It is engaged in device module (remote server 7, remote terminal 8).
In this example, multi-functional energy table module includes intelligent electric meter, intellectual water meter and intelligent gas meter 1, the intelligence
Energy meter module includes control module, communication module, metering module, clock module, memory module, display module and power supply mould
Block；The intellectual water meter module include control module, electromagnetic water valve, communication module, metering module, clock module, memory module,
Display module and power module；The intelligent gas meter module include control module, gas valve, communication module, metering module, when
Clock module, memory module, display module and power module.LoRa radio frequency transmission module includes acquisition node 2, the acquisition of LoRa data
Controller 3 and bus, the LoRa data acquisition controller is by power module, LoRaSX1278 radio-frequency module, control circuit mould
Block, jtag interface module and bus interface module composition；The transfer bus is RS-485 universal serial bus.LoRa gateway module
Including relay node 4, aggregation node 5, LoRa outer net 6, the aggregation node and relay node are by power module, LoRaSX1278
Radio-frequency module, jtag interface module and bus interface module composition.Remote server module includes remote server 7 and long-range end
End 8.
Referring to fig. 2, LoRa low power consuming devices work flow diagram of the present invention is controlled using the MAC layer of sensor and is calculated
Method realizes that periodic work/standby mode is converted, using asynchronous wake-up mechanism, each equipment maintain oneself work and
Standby period, under transmission state, the equipment for needing to send data persistently sends one section of lead code Preamble wake-up signal, connects
Receiving unit is periodically detected whether receive wake-up signal, if receiving wake-up signal, then carries out Address Confirmation, confirms nothing
Carry out data transmission after accidentally with sending node.Transmission flow are as follows: LoRa chip is constantly in standby mode before sending, initial
After changing module, chip memory is first write data into, transmission state is then switched to by standby mode, LoRa data is modulated into hair
It sees off, primary interruption can be generated by being sent rear radio-frequency module, be changed into standby mode by transmission state；In reception state
Under, LoRa equipment can at a given time period in search LoRa data frame in lead code Preamble, if in this period
It does not search inside, then can generate primary interruption, standby mode is switched to by reception state, if data receiver finishes, the school CRC
Testing code can fail, and can equally generate primary interruption at this time, be switched to standby mode by reception state.Therefore, LoRa data packet
Transmission time is the sum of lead code Preamble transmission time and packet transmission time in wakeup process, Tdate=TPreamble+
Tpayload, wherein TPreambleFor lead code Preamble transmission time, TPreamble=(4.25+nPreamble)×Ts, nPreambleFor
Preamble length；TpayloadFor packet transmission time,
Sf is spreading factor, TsFor symbol transmission rate, PL is transmission byte number, and H takes " 1 " or " 0 " (no header and have header), and DE takes
" 1 " or " 0 ", CR are encoding rate (taking 1 to 4).
Intelligent ammeter module, intellectual water meter module and intelligent gas meter module 1 are for recording and controlling the use of user's energy
State, LoRa radio frequency transmission module are connect with the energy in residential building with table module by bus；LoRa data acquisition controller 3
Specified order is sent to the communication module of multi-functional energy table module for controlling acquisition node 2, then receives multi-functional energy
The data that source is returned with table are parsed with corresponding agreement and are transmitted to relay node 4；Relay node 4 will be for that will count
According to being sent to aggregation node 5；Aggregation node 5 is used to the received multi-functional energy being uploaded to remote server 7 with table data；
LoRa outer net 6 is for connecting aggregation node and remote server；Remote server 7 is useful for being parsed into received data
Information is stored in database, and the state of each multi-functional energy table of access of intellectual monitoring；Remote terminal 8 is for providing authorization
User accesses multi-functional energy table status information.
Referring to Fig. 3, Fig. 4, Fig. 5, intelligent electric meter of the present invention, water meter, gas meter, flow meter structural schematic diagram；It all include control
Module, communication module, metering module, clock module, memory module, display module and power module.Intelligence is all made with table module
STM32F103 chip is used with the processor unit of the chip of low-power consumption, control module, communication module uses SX1278 as nothing
Line communication chip, memory module are stored using SDRAM, and clock module uses DS1302 clock circuit structure；Multifunctional intellectual is used
Table module provides reliable security mechanism, and the control module of intelligent electric meter, which can be realized manually or automatically, opens or closes power supply,
There is electromagnetic water valve in intellectual water meter module, can manually or automatically be realized by electromagnetic water valve and open or close water valve function, intelligence
There is gas valve in gas meter, flow meter module, can manually or automatically be realized by gas valve and open or close gas valve function.Intelligent electric meter,
The meter reading operating mode of water meter, gas meter, flow meter are as follows: record electricity, water, combustion gas flow, store data in memory module, work as reception
Acquisition node is transferred data to after to the order of radio frequency transmission module.
Referring to Fig. 6, Fig. 7, relay node and aggregation node structural schematic diagram of the present invention, including at STM32F103
Manage device unit, SX1278 radio-frequency module, memory module, power module, jtag interface module, RS-485 bus module, outside LoRa
Net module.LoRa data acquisition controller control acquisition node in LoRa radio frequency transmission module is to multi-functional energy table module
Communication module send specified order (radio frequency transmission module and the energy with the communication mode between table module ordered by sending
Frame and the method for replying command frame are realized, command frame is respectively sent are as follows: 0x0100 (reads the multi-functional essential information with table),
0x0101 (reads the current multi-functional status information with table), and 0x0200 (reads multi-functional table this month usage amount), 0x0201
(read multi-functional use table history usage amount), respectively replies command frame are as follows: 0x0110,0x0111,0x0210,0x0211), with being followed by
The data that multi-functional energy table returns are received, is parsed and is transmitted to relay node, relay node with corresponding agreement
Aggregation node is transmitted data to again, and the received multi-functional energy is uploaded to far by aggregation node by LoRa outer net with table data
Journey server is parsed into useful information and is stored in database, and the state of each multi-functional energy table of access of intellectual monitoring,
User can access inquiry to corresponding information in terminal.
Remote server module include equipment control service, data acquisition service and other service, remote server with
Aggregation node establishes communication by LoRa outer net, it monitors the state of each multi-functional energy table of access, can control radio frequency
Module carries out data acquisition with table to the multi-functional energy, it completes the acquisition and arrangement of useful information, stores it in database,
Terminal inquiry access service is provided for energy resource supply unit and authorized user.
Claims (12)
1. the intelligent low-power consumption multi-functional energy table design method based on LoRa, which is characterized in that including intelligent electric meter
Module, intellectual water meter module, intelligent gas meter module, LoRa radio frequency transmission module, LoRa gateway module and remote server mould
Block；
The intelligent ammeter module is for recording user power utilization state, including control module, communication module, metering module, clock
Module, memory module, display module and power module；
The intellectual water meter module is for recording user's water state, including control module, electromagnetic water valve, communication module, metering
Module, clock module, memory module, display module and power module；
The intelligent gas meter module is for recording user's combustion gas state, including control module, gas valve, communication module, meter
Measure module, clock module, memory module, display module and power module；
The LoRa radio frequency transmission module for connect it is multi-functional use table module and LoRa gateway module, including acquisition node,
LoRa data acquisition controller and transfer bus；
The LoRa gateway module is for connecting LoRa radio frequency transmission module and server module, including aggregation node, relaying section
Point and LoRa outer net；
The remote server module includes equipment control service, data acquisition service and other services.
2. the intelligent low-power consumption multi-functional energy table design method according to claim 1 based on LoRa, special
Sign is that the LoRa radio frequency transmission module is by sending out intelligent ammeter module, intellectual water meter module and intelligent gas meter module
Send specified order, then receive the data that are returned with table of intelligent multifunctional, parsed with corresponding agreement and transmit to
LoRa gateway module, LoRa gateway module are uploaded onto the server it to carry out data solution by LoRa outer net after receiving information
Analysis, by useful data storage to database.
3. intelligent ammeter module according to claim 1, intellectual water meter module and intelligent gas meter module, feature exist
In the processor unit of the control module uses STM32F103 chip, and communication module uses SX1278 as radio frequency transmission core
Piece.
4. intelligent ammeter module according to claim 1, intellectual water meter module and intelligent gas meter module, feature exist
In, in the clock module use clock circuit DS1302 structure.
5. LoRa radio frequency transmission module according to claim 1, which is characterized in that the LoRa data acquisition controller by
Power module, LoRaSX1278 radio-frequency module, control circuit module, jtag interface module and bus interface module composition.
6. LoRa gateway module according to claim 1, which is characterized in that the aggregation node, relay node are by power supply
Module, LoRaSX1278 radio-frequency module, jtag interface module and bus interface module composition.
7. LoRa radio frequency transmission module according to claim 1, which is characterized in that the transfer bus is RS-485 string
Row bus.
8. the intelligent low-power consumption multi-functional energy table design method according to claim 2 based on LoRa, special
Sign is, makes between the intelligence table module, LoRa radio frequency transmission module, LoRa gateway module and each module of remote server
Connection is established with LoRa protocol stack.
9. the communication of LoRa radio-frequency module according to claim 2 and the multi-functional energy between table module, feature exist
In the communication mode is realized by sending command frame and replying the method for command frame, respectively sends command frame are as follows: 0x0100
(reading the multi-functional essential information with table), 0x0101 (read the current multi-functional status information with table), and 0x0200 (is read more
Function table this month usage amount), 0x0201 (reads multi-functional table history usage amount), respectively replies command frame are as follows: 0x0110,
0x0111,0x0210,0x0211.
10. LoRa protocol stack according to claim 8, which is characterized in that LoRa protocol stack includes that RF Layer (is wirelessly penetrated
Frequency layer), PHY Layer (physical layer), MAC Layer (media access control layer) and Application Layer (application layer),
By the transmitting and receiving of LoRa protocol realization LoRa data frame.Wherein, RF Layer is used to modulate the PHY frame in required RF carrier wave,
And be transferred in the air, PHY Layer is for constructing PHY frame, and MAC Layer is for constructing mac frame.
11. LoRa data frame according to claim 10, which is characterized in that the LoRa data frame packet disappears containing a uplink
Breath and a downstream message, upstream message are sent to network service end by one or more gateways by terminal device, and uplink disappears
Breath is made of lead code Preamble, packet header PHAD, packet header crc value PHAD_CRC, data PHYpayload and CRC check, under
Row message is sent to terminal device by network service end, and downstream message is by lead code Preamble, packet header PHAD, packet header crc value
PHAD_CRC and data PHYpayload composition.
12. the format of data frame packet according to claim 11, it is characterised in that the data of LoRa protocol modulation transmit speed
Rate are as follows:The transmission rate of symbol are as follows:The transmission time of symbol are as follows:Wherein, sf is to expand
The frequency factor, BW are modulation bandwidth.
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| CN111637942A (en) * | 2020-04-21 | 2020-09-08 | 武汉菲奥达物联科技有限公司 | Airport energy management device and system based on LoRaWAN agreement |
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| CN112367249A (en) * | 2020-09-30 | 2021-02-12 | 浙江三维万易联科技有限公司 | Communication method of LoRa device, LoRaWAN system, electronic apparatus, and storage medium |
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