CN108957080A - A kind of single-phase pre-payment electric energy meter based on the LoRa communication technology - Google Patents
A kind of single-phase pre-payment electric energy meter based on the LoRa communication technology Download PDFInfo
- Publication number
- CN108957080A CN108957080A CN201810480433.XA CN201810480433A CN108957080A CN 108957080 A CN108957080 A CN 108957080A CN 201810480433 A CN201810480433 A CN 201810480433A CN 108957080 A CN108957080 A CN 108957080A
- Authority
- CN
- China
- Prior art keywords
- electric energy
- module
- energy meter
- electricity
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/56—Special tariff meters
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention relates to a kind of single-phase pre-payment electric energy meters based on the LoRa communication technology, belong to intelligent electric meter field.The electric energy meter includes microprocessor, electric energy metering module, relay control module, power module, general module, pre-payment module and LoRa communication module, and wherein LoRa communication module includes main control module, radio-frequency module, communication interface and power management module.It is optimized by impedance matching network to radio-frequency module and microstrip transmission line, to reduce radio frequency link path loss, improves energy transmission efficiency.The electric energy meter effective communication distance can reach 6000 meters, and communication distance is remote；The efficient communication across 7 walls and 5 floors may be implemented, communication penetration capacity is strong.The present invention can meet the communication requirement of smart meter reading well, have broad application prospects.
Description
Technical field
The invention belongs to intelligent electric meter fields, are related to a kind of single-phase pre-payment electric energy meter based on the LoRa communication technology.
Background technique
LoRa wireless communication technique is exactly wherein Typical Representative and low-power consumption wan communication skill most with prospects
One of art.LoRa be it is a kind of work global unlicensed band novel wireless communication technology, dispose it is low with operation maintenance cost,
Have many advantages, such as that data safety is controllable, strong antijamming capability and communication distance are remote.Currently, urgent in intelligent electric meter meter reading field
Need a kind of at low cost, communication communication technology that penetration capacity is strong and communication distance is remote.
Summary of the invention
In view of this, it is an object of the invention to mention a kind of single-phase pre-payment electric energy meter based on the LoRa communication technology, it will
LoRa wireless communication technique is applied to smart meter reading domain variability and is combined together it with single-phase pre-payment electric energy meter.Test result
Show that the electric energy meter effective communication distance can reach 6000 meters, communication distance is remote；Having across 7 walls and 5 floors may be implemented
Effect communication, communication penetration capacity is strong, can very well satisfy the communication requirement of smart meter reading, have broad application prospects.
In order to achieve the above objectives, the invention provides the following technical scheme:
A kind of single-phase pre-payment electric energy meter based on the LoRa communication technology, including microprocessor, electric energy metering module, relay
Device control module, power module, general module, pre-payment module and LoRa communication module；
The electric energy metering module includes current sampling, voltage sampling and electric energy computation chip, and electric energy computation chip uses
The anti-electricity-theft the special metering IC RN8209C of single-phase multifunctional, electric energy computation chip pass through collected voltage and current signals
Gain amplifier amplifies, and then converts analog signals into digital signal by analog-digital converter, after filtering, electric current
It is multiplied with voltage data and obtains active power, be finally sent to microprocessor in the form of high impulse and after treatment；
The relay control module includes relay and relay control, for the on-off of control circuit, works as micro process
It when device receives the subscriber arrearage signal that electricity sales management system transmits, issues and disconnects relay order, relay controls and receives life
Relay is controlled after order executes order, the supply of dissection user's power supply；
The power module include power line power supply and lithium battery power supply, under normal circumstances by power line to electric energy meter into
Row power supply is then powered electric energy meter by lithium battery when line failure has a power failure, and guarantees that electric energy meter communication is normal；
The general module includes that liquid crystal display, clock unit, storage unit, indicating unit and pulse output are single
Member, in which:
The liquid crystal display is used to show that each rate to add up electric flux indicating value and always accumulative electric flux indicating value, maximum need
Amount, active energy direction, date, time, this month and monthly accumulative electricity consumption last month, relay information, prepayment information and
Table address；
The clock unit mainly provides time reference in electric energy meter, using the built in hardware with temperature compensation function
Clock circuit has calendar, timing, leap year auto-conversion function；
The storage unit uses EEPROM, saves electricity, area code and number data and state, does not lose after power failure；
The indicating unit uses highlighted, long-life LED as indicator light；Wherein pulse indicator light is red, is usually gone out,
It is flashed when measuring active energy；Alarm lamp be also it is red, go out when normal, when alarm is always on；Tripping indicator light is yellow, is born
It is bright when lotus switch-segment, usually go out；
The management that the active pulse that the pulse output unit exports needs is exported.
Further, the microprocessor uses FM3308 electric energy meter special chip, and microprocessor is the core of electric energy meter, leads to
The function of crossing calculating and processing event connects other modules to form a unified entirety, completes the electric energy meter of electric energy meter
Amount, data are shown, after the function of electric control, pre-payment control and wireless communication.
Further, the pre paid functionality that the pre-payment module realizes electric energy meter by being inserted into IC card in electric energy meter, function
Can include:
1) data initialization function: electricity sales management system is by user's IC card to electricity forward purchasing, remaining alarm electricity thresholding, most
Electricity, load thresholding and agreement overdraw electrical parameter is hoarded greatly to be configured；
2) intelligent control function: electric energy meter uses impulse sampling mode automatic gauge user's electricity, when user's purchase of electricity is used
When complete or agreement overdraw electricity is used up, electric energy meter output tripping control signal cuts off user power utilization；
3) pre-alarm function: when the remaining capacity shown in user's electric energy meter is less than alarm electricity, user's alarm is given
Prompt, so as to user's power purchase as early as possible；
4) load controlling function: when power load continues to exceed the controlling value of electric energy meter setting, the load of electric energy meter is opened
Automatic disconnection is closed, protection electric line, equipment are not damaged, and when power load is reduced in control range, electric energy meter is automatic
It closes a floodgate, it is user-friendly；
5) safety protection function: having key safety certification in IC card and electric energy meter, guarantees Electrical Safety；
6) electricity freezing function: electricity sales management system can freeze to instruct to generated energy under electric energy meter, and will freeze electricity
Data are copied to be calculated back into line damage statistics and the electricity charge.
Further, the LoRa communication module is used to the data in electric energy meter being sent to electricity sales management system, connects simultaneously
Controlled signal by electricity sales management system transmission and realize long-range control to electric energy meter, LoRa communication module include main control module,
Radio-frequency module, communication interface and power management module, in which:
The main control module radio-frequency module, communication interface and power management module are connected to be formed one it is unified
It is whole, control and management role, including main control chip, clock circuit, reset circuit, filtered electrical are risen to entire LoRa communication module
Road, debugging interface and radio frequency interface；
The radio-frequency module includes radio frequency chip, clock circuit, electric source filter circuit, radio-frequency front-end, impedance matching and micro-
Band transmission line, wherein radio frequency chip uses the SX1276 chip with LoRa technology；
The communication interface includes UART and GPIO interface, for acquiring electric energy meter related data；
The power management module provides electric energy for the normal operation of LoRa communication module, carries out communication survey for electric energy meter
Examination.
Further, the impedance matching network of the radio-frequency module are as follows:
To reduce radio frequency link path loss, energy transmission efficiency is improved, Smith circle diagram is borrowed and carries out impedance matching network
Design；According to the impedance operator of radio frequency chip, the matching of 50 Ω normal impedances is carried out to prevention at radio-frequency port using L-type matching network；
In conjunction with Smith circle diagram impedance point matching grating, first series capacitance moves counterclockwise along equal resistance circle, then an inductance in parallel, edge
Etc. conductances circle it is mobile counterclockwise；By the adjustment to series capacitance and shunt inductance value, source impedance 13.7+j2.6 Ω is matched to
50 Ω of normal impedance, wherein capacitor value 12.8pF, inductance value 9.8nH；In conjunction with practical engineering application, capacitor and inductor difference
Value 13pF, 10nH.
Further, the microstrip transmission line of the radio-frequency module are as follows:
To reduce radio frequency link path loss, energy transmission efficiency is improved, 50 Ω impedance values are carried out by AppCAD tool
The calculating and design of microstrip line, by simulation software to dielectric constant, dielectric substrate thickness, dielectric surface copper is thick, cabling over the ground
The setting of width parameter and the adjustment of trace width finally obtain the microstrip line of 50.8 Ω, and dielectric constant is set as 4.4, medium base
Piece thickness is set as 1mm, and dielectric surface copper thickness is set as 0.03mm, and width is set as 0.5mm, trace width setting to cabling over the ground
For 1.4mm.
The beneficial effects of the present invention are:
(1) impedance matching network and microstrip transmission line of the invention by LoRa communication module radio circuit optimizes
Design, effectively reduces path loss, improves energy transmission efficiency.
(2) a kind of single-phase pre-payment electric energy meter effective communication distance based on the LoRa communication technology of the present invention is reachable
To 6000 meters, communication distance is remote.
(3) a kind of single-phase pre-payment electric energy meter based on the LoRa communication technology of the present invention may be implemented stifled across 7
The efficient communication of wall and 5 floors, communication penetration capacity are strong.
(4) a kind of single-phase pre-payment electric energy meter based on the LoRa communication technology of the present invention has pre paid functionality,
It can adapt to the development of WeiLai Technology.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing and carries out
Illustrate:
Fig. 1 is each module connection diagram of electric energy meter of the invention.
Fig. 2 is LoRa communication module connection schematic diagram.
Fig. 3 is radio-frequency module impedance matching network design diagram.
Fig. 4 is radio-frequency module microstrip transmission line design diagram.
Fig. 5 is 1 through-wall performance test schematic diagram of embodiment.
Fig. 6 is that embodiment 2 wears floor performance test schematic diagram.
Specific embodiment
Below in conjunction with attached drawing, a preferred embodiment of the present invention will be described in detail.
As shown in Figure 1, a kind of single-phase pre-payment electric energy meter based on the LoRa communication technology, including microprocessor, electric energy meter
Measure module 1, relay control module 2, power module 3, general module 4, pre-payment module 5 and LoRa communication module 6.
Microprocessor uses the FM3308 electric energy meter special chip of Co., Ltd of Shanghai Fudan Microelectronics, and microprocessor is electricity
The core of energy table, other modules are connected to form a unified entirety, pass through powerful computing capability and processing event
Ability, complete the electrical energy measurement of electric energy meter, data are shown, after electric control, pre-payment control and wireless communication function.
Electric energy metering module 1 includes current sampling, voltage sampling and electric energy computation chip, wherein electric energy computation chip is adopted
The anti-electricity-theft the special metering IC RN8209C of single-phase multifunctional produced with Rui Nengwei Science and Technology Ltd. of Shenzhen.Electrical energy measurement
Chip amplifies collected voltage and current signals by gain amplifier, is then believed simulation by analog-digital converter
Number it is converted into digital signal, after filtering, electric current is multiplied with voltage data obtains active power, finally in the form of high impulse
And it is sent to microprocessor after treatment.
Relay control module 2 includes that relay and relay control, and is mainly used for the on-off of control circuit, works as micro process
It when device receives the subscriber arrearage signal that electricity sales management system transmits, issues and disconnects relay order, relay controls and receives life
Relay is controlled after order executes order, the supply of dissection user's power supply.
Power module 3 includes power line power supply and lithium battery power supply, is carried out under normal circumstances by power line to electric energy meter
Power supply is then powered electric energy meter by lithium battery when line failure has a power failure, and guarantees that electric energy meter communication is normal.
General module 4 includes liquid crystal display, clock unit, storage unit, indicating unit and pulse output unit,
In: liquid crystal display is for showing that each rate adds up electric flux indicating value and always accumulative electric flux indicating value, maximum demand, active electricity
It can direction, date, time, this month and monthly accumulative electricity consumption last month, relay information, prepayment information and table address etc.；
Clock unit mainly provides time reference in electric energy meter, using the hardware clock circuit with temperature compensation function, tool
There are calendar, timing, leap year auto-conversion function；Storage unit uses EEPROM, saves data and the shapes such as electricity, area code and number
State is not lost after power failure；Indicating unit uses highlighted, long-life LED as indicator light.Wherein pulse indicator light is red, is put down
When go out, flashed when measuring active energy, alarm lamp be also it is red, go out when normal, when alarm is always on, and tripping indicator light is Huang
Color, on-load switch is bright when being segmented, and usually goes out；The management that the active pulse that pulse output unit exports needs is exported.
The pre paid functionality that pre-payment module 5 realizes electric energy meter by being inserted into IC card in electric energy meter, major function have:
1) data initialization function: electricity sales management system can by user's IC card to electricity forward purchasing, remaining alarm electricity thresholding,
Maximum is hoarded the parameters such as electricity, load thresholding and agreement overdraw electricity and is configured.
2) intelligent control function: electric energy meter uses impulse sampling mode automatic gauge user's electricity, when user's purchase of electricity is used
When complete or agreement overdraw electricity is used up, electric energy meter output tripping control signal cuts off user power utilization.
3) pre-alarm function: when the remaining capacity shown in user's electric energy meter is less than alarm electricity, user's alarm is given
Prompt, so as to user's power purchase as early as possible.
4) load controlling function: when power load continues to exceed the controlling value of electric energy meter setting, the load of electric energy meter is opened
Automatic disconnection is closed, protection electric line, equipment are not damaged, and when power load is reduced in control range, electric energy meter is automatic
It closes a floodgate, it is user-friendly.
5) safety protection function: having key safety certification in IC card and electric energy meter, guarantees Electrical Safety.
6) electricity freezing function: electricity sales management system can freeze to instruct to generated energy under electric energy meter, and will freeze electricity
Data are copied to be calculated back into line damage statistics and the electricity charge.
LoRa communication module 6 is used to the data in electric energy meter being sent to electricity sales management system, while receiving sale of electricity management
The control signal that system is sent realizes the long-range control to electric energy meter.
As shown in Fig. 2, LoRa communication module mainly includes main control module, radio-frequency module, communication interface and power management
Module, in which:
Main control module radio-frequency module, communication interface and power management module are connected to be formed one it is unified whole
Body plays control and management role to entire LoRa communication module, mainly includes main control chip, clock circuit, reset circuit, filtering
Circuit, debugging interface and radio frequency interface.
Radio-frequency module is transmitted by radio frequency chip, clock circuit, electric source filter circuit, radio-frequency front-end, impedance matching and micro-strip
Line composition.Wherein, radio frequency chip uses the SX1276 chip with LoRa technology, is the core of radio circuit.Radio-frequency module is
The key component of entire LoRa Communication Module Design, determines the performance of entire communication system.
Communication interface is made of UART and GPIO interface, convenient for acquisition electric energy meter related data.
Power management module provides electric energy for the normal operation of LoRa communication module, carries out communication test convenient for electric energy meter.
As shown in figure 3, the impedance matching network design method of radio-frequency module are as follows:
Borrow the design that Smith circle diagram carries out impedance matching network.According to the impedance operator of radio frequency chip, using L-type
Distribution network carries out the matching of 50 Ω normal impedances to prevention at radio-frequency port.In conjunction with Smith circle diagram impedance point matching grating, first series capacitance,
Along etc. resistance circle moves counterclockwise, a then inductance in parallel, along etc. conductances justify and move counterclockwise.By to series capacitance and parallel connection
Source impedance 13.7+j2.6 Ω is effectively matched to 50 Ω of normal impedance, wherein capacitor value 12.8pF by the adjustment of inductance value,
Inductance value 9.8nH.In conjunction with practical engineering application, which distinguishes value 13pF, 10nH.
The microstrip transmission line design method of radio-frequency module as shown in Figure 4 are as follows:
The calculating and design of 50 Ω impedance value microstrip lines are carried out by AppCAD tool, it is normal to dielectric by simulation software
Number, dielectric substrate thickness, dielectric surface copper is thick, the setting of the parameters such as width and the adjustment of trace width finally obtain cabling over the ground
The microstrip line of 50.8 Ω, the permittivity εr4.4 finally are set as, the dielectric substrate thickness 1 is finally set as 1mm, institute
It states dielectric surface copper thickness 2 and is finally set as 0.03mm, width 3 is finally set as 0.5mm, the trace width to the cabling over the ground
4 are finally set as 1.4mm.
Embodiment 1
As shown in figure 5, communicating through-wall performance test schematic diagram for electric energy meter, 8 rooms are chosen in through-wall performance test, in room
Between 1 place electric energy meter emit (Tx) signal, rooms 2~8 respectively places reception signal module (Rx1~Rx7).Transmitting ginseng
Number setting are as follows: launching centre frequency 433MHz, transmission power 20dBm, bandwidth BW 125kHz, test result are as shown in table 1.
1 embodiment of table, 1 test result
| Receiving module | Number through walls | Packet sending speed (bps) | Number of giving out a contract for a project (a)/data packet length (byte) | Packet loss |
| Rx1 | 1 | 3125 | 100/64 | 0% |
| Rx2 | 2 | 3125b | 100/64 | 0% |
| Rx3 | 3 | 3125 | 100/64 | 0% |
| Rx4 | 4 | 3125 | 100/64 | 2% |
| Rx5 | 5 | 3125 | 100/64 | 5% |
| Rx6 | 6 | 3125 | 100/64 | 7% |
| Rx7 | 7 | 3125 | 100/64 | 9% |
By test result it is found that 3 wall of rectilinear direction may be implemented in electric energy meter communicates without packet loss, when 4 wall, starts to occur
Packet loss, packet loss is less than 10% when 7 wall, and packet loss is in certain allowed band.
Embodiment 2
As shown in fig. 6, wearing floor performance test to wear floor performance test schematic diagram and choosing 9 floors, in the 5th floor
It places electric energy meter and emits (Tx) signal, receiving module (Rx4, Rx3, Rx2, Rx1) is placed respectively in 1-4 floors, in 6-9 floors
Place receiving module (Rx5~Rx8) respectively.Test result is as shown in table 2.
2 embodiment of table, 2 test result
By test result it is found that 3 floors substantially may be implemented without packet loss communication in the electric energy meter, 4 floors start to lose
It wraps, packet loss can be achieved in 5 floors less than 10%, packet loss is in certain allowed band.It may further find, when connecing
Communication performance is better than with the top receiving end for wearing number of floor levels when receiving end is located at the following floor of electric energy meter.
From embodiment 1 and embodiment 2 it is found that this single-phase pre-payment electric energy meter based on the LoRa communication technology can guarantee
Efficient communication within the scope of 6000 meters, communication distance are remote；It still maintains higher after passing through 7 walls or 5 floors to communicate successfully
Rate, communication penetration capacity are strong.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention and not to limit it, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (6)
1. a kind of single-phase pre-payment electric energy meter based on the LoRa communication technology, it is characterised in that: including microprocessor, electrical energy measurement
Module, relay control module, power module, general module, pre-payment module and LoRa communication module；
The electric energy metering module includes current sampling, voltage sampling and electric energy computation chip, and electric energy computation chip is using single-phase
Collected voltage and current signals are passed through gain by multi-function electricity fraudulent using-proof the special metering IC RN8209C, electric energy computation chip
Amplifier amplifies, and then converts analog signals into digital signal by analog-digital converter, after filtering, electric current and electricity
Pressure data multiplication obtains active power, is finally sent to microprocessor in the form of high impulse and after treatment；
The relay control module includes relay and relay control, for the on-off of control circuit, when microprocessor connects
When receiving the subscriber arrearage signal that electricity sales management system transmits, issues and disconnect relay order, after relay controls and receives order
Control relay executes order, the supply of dissection user's power supply；
The power module includes power line power supply and lithium battery power supply, is supplied under normal circumstances by power line electric energy meter
Electricity is then powered electric energy meter by lithium battery when line failure has a power failure, and guarantees that electric energy meter communication is normal；
The general module includes liquid crystal display, clock unit, storage unit, indicating unit and pulse output unit,
In:
The liquid crystal display for show each rate add up electric flux indicating value and always accumulative electric flux indicating value, maximum demand,
Active energy direction, date, time, this month and monthly accumulative electricity consumption last month, relay information, prepayment information and table
Location；
The clock unit mainly provides time reference in electric energy meter, using the hardware clock with temperature compensation function
Circuit has calendar, timing, leap year auto-conversion function；
The storage unit uses EEPROM, saves electricity, area code and number data and state, does not lose after power failure；
The indicating unit uses highlighted, long-life LED as indicator light；Wherein pulse indicator light is red, is usually gone out, and is measured
It is flashed when active energy；Alarm lamp be also it is red, go out when normal, when alarm is always on；Tripping indicator light is yellow, and load is opened
It is bright when the segmentation of pass, usually go out；
The management that the active pulse that the pulse output unit exports needs is exported.
2. a kind of single-phase pre-payment electric energy meter based on the LoRa communication technology according to claim 1, it is characterised in that: institute
Microprocessor is stated using FM3308 electric energy meter special chip, microprocessor is the core of electric energy meter, by calculating and handling event
Function other modules are connected to form a unified entirety, complete the electrical energy measurement of electric energy meter, data are shown, relay
The function of control, pre-payment control and wireless communication.
3. a kind of single-phase pre-payment electric energy meter based on the LoRa communication technology according to claim 1, it is characterised in that: institute
The pre paid functionality that pre-payment module realizes electric energy meter by being inserted into IC card in electric energy meter is stated, function includes:
1) data initialization function: electricity sales management system is by user's IC card to electricity forward purchasing, remaining alarm electricity thresholding, maximum grain bin
Product electricity, load thresholding and agreement overdraw electrical parameter are configured；
2) intelligent control function: electric energy meter uses impulse sampling mode automatic gauge user's electricity, be finished when user's purchase of electricity or
When agreement overdraw electricity is used up, electric energy meter output tripping control signal cuts off user power utilization；
3) pre-alarm function: when the remaining capacity shown in user's electric energy meter is less than alarm electricity, giving user's warning note,
So as to user's power purchase as early as possible；
4) load controlling function: when power load continues to exceed the controlling value of electric energy meter setting, the on-load switch of electric energy meter is certainly
Dynamic circuit breaker is opened, and protection electric line, equipment are not damaged, when power load is reduced in control range, electric energy meter automatic closing,
It is user-friendly；
5) safety protection function: having key safety certification in IC card and electric energy meter, guarantees Electrical Safety；
6) electricity freezing function: electricity sales management system can freeze to instruct to generated energy under electric energy meter, and will freeze electricity data
It copies and is calculated back into line damage statistics and the electricity charge.
4. a kind of single-phase pre-payment electric energy meter based on the LoRa communication technology according to claim 1, it is characterised in that: institute
LoRa communication module is stated for the data in electric energy meter to be sent to electricity sales management system, while receiving electricity sales management system transmission
Control signal realize long-range control to electric energy meter, LoRa communication module include main control module, radio-frequency module, communication interface with
And power management module, in which:
The main control module radio-frequency module, communication interface and power management module are connected to be formed one it is unified whole
Body plays control and management role, including main control chip, clock circuit, reset circuit, filtered electrical to entire LoRa communication module
Road, debugging interface and radio frequency interface；
The radio-frequency module includes that radio frequency chip, clock circuit, electric source filter circuit, radio-frequency front-end, impedance matching and micro-strip pass
Defeated line, wherein radio frequency chip uses the SX1276 chip with LoRa technology；
The communication interface includes UART and GPIO interface, for acquiring electric energy meter related data；
The power management module provides electric energy for the normal operation of LoRa communication module, carries out communication test for electric energy meter.
5. a kind of single-phase pre-payment electric energy meter based on the LoRa communication technology according to claim 4, it is characterised in that: institute
State the impedance matching network of radio-frequency module are as follows:
To reduce radio frequency link path loss, energy transmission efficiency is improved, Smith circle diagram is borrowed and carries out setting for impedance matching network
Meter；According to the impedance operator of radio frequency chip, the matching of 50 Ω normal impedances is carried out to prevention at radio-frequency port using L-type matching network；In conjunction with
Smith circle diagram impedance point matching grating, first series capacitance move counterclockwise along equal resistance circle, then one inductance of parallel connection, along equal electricity
Rounding moves counterclockwise；By the adjustment to series capacitance and shunt inductance value, source impedance 13.7+j2.6 Ω is matched to standard
50 Ω of impedance, wherein capacitor value 12.8pF, inductance value 9.8nH；In conjunction with practical engineering application, which distinguishes value
13pF、10nH。
6. a kind of single-phase pre-payment electric energy meter based on the LoRa communication technology according to claim 4, it is characterised in that: institute
State the microstrip transmission line of radio-frequency module are as follows:
To reduce radio frequency link path loss, energy transmission efficiency is improved, 50 Ω impedance value micro-strips are carried out by AppCAD tool
The calculating and design of line, by simulation software to dielectric constant, dielectric substrate thickness, dielectric surface copper is thick, cabling width over the ground
The setting of parameter and the adjustment of trace width finally obtain the microstrip line of 50.8 Ω, and dielectric constant is set as 4.4, and dielectric substrate is thick
Degree is set as 1mm, and dielectric surface copper thickness is set as 0.03mm, and width is set as 0.5mm to cabling over the ground, and trace width is set as
1.4mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810480433.XA CN108957080A (en) | 2018-05-18 | 2018-05-18 | A kind of single-phase pre-payment electric energy meter based on the LoRa communication technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810480433.XA CN108957080A (en) | 2018-05-18 | 2018-05-18 | A kind of single-phase pre-payment electric energy meter based on the LoRa communication technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108957080A true CN108957080A (en) | 2018-12-07 |
Family
ID=64499214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810480433.XA Pending CN108957080A (en) | 2018-05-18 | 2018-05-18 | A kind of single-phase pre-payment electric energy meter based on the LoRa communication technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108957080A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109344934A (en) * | 2018-12-12 | 2019-02-15 | 威胜集团有限公司 | Pre-payment radio-frequency card and electric energy meter data exchange process detection device and detection method |
| CN110187171A (en) * | 2019-06-25 | 2019-08-30 | 武汉阿迪克电子股份有限公司 | A kind of the LoRaWAN electric energy meter and method of network entry of quick networking mechanism |
| CN110716085A (en) * | 2019-11-11 | 2020-01-21 | 黑龙江省电工仪器仪表工程技术研究中心有限公司 | Single-phase electric energy meter with LoRa communication function |
| CN112068468A (en) * | 2020-08-27 | 2020-12-11 | 成都长城开发科技有限公司 | Closing control circuit and device of ammeter and ammeter |
| CN113365370A (en) * | 2021-05-24 | 2021-09-07 | 内蒙古工业大学 | Intelligent mobile system based on LoRa technique |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201429875Y (en) * | 2009-08-11 | 2010-03-24 | 惠州市龙鼎盛电力科技有限公司 | Triphase prepayment electric energy meter |
| CN201549018U (en) * | 2009-08-11 | 2010-08-11 | 惠州市龙鼎盛电力科技有限公司 | Single-phase electronic CPU card prepaid electric energy meter |
| CN201689494U (en) * | 2009-09-25 | 2010-12-29 | 河南新天科技股份有限公司 | Single phase carrier wave CPU card electric energy meter |
| CN201955840U (en) * | 2010-12-22 | 2011-08-31 | 哈尔滨电工仪表研究所 | Local single-phase prepaid intelligent electric energy meter |
| CN204129860U (en) * | 2014-09-09 | 2015-01-28 | 江苏海恩德电气有限公司 | Based on the pre-payment electric control system of non-contact IC card |
-
2018
- 2018-05-18 CN CN201810480433.XA patent/CN108957080A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201429875Y (en) * | 2009-08-11 | 2010-03-24 | 惠州市龙鼎盛电力科技有限公司 | Triphase prepayment electric energy meter |
| CN201549018U (en) * | 2009-08-11 | 2010-08-11 | 惠州市龙鼎盛电力科技有限公司 | Single-phase electronic CPU card prepaid electric energy meter |
| CN201689494U (en) * | 2009-09-25 | 2010-12-29 | 河南新天科技股份有限公司 | Single phase carrier wave CPU card electric energy meter |
| CN201955840U (en) * | 2010-12-22 | 2011-08-31 | 哈尔滨电工仪表研究所 | Local single-phase prepaid intelligent electric energy meter |
| CN204129860U (en) * | 2014-09-09 | 2015-01-28 | 江苏海恩德电气有限公司 | Based on the pre-payment electric control system of non-contact IC card |
Non-Patent Citations (4)
| Title |
|---|
| 徐文磊: "433MHz低噪声放大器的设计与功率放大器的实现", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 王于波 等: "基于LoRa技术的电力抄表模块研究", 《国外电子测量技术》 * |
| 王冬: "IC卡电表的应用及发展前景探讨", 《科技情报开发与经济》 * |
| 辛雄: "基于LoRa智能电能表的研究与设计", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109344934A (en) * | 2018-12-12 | 2019-02-15 | 威胜集团有限公司 | Pre-payment radio-frequency card and electric energy meter data exchange process detection device and detection method |
| CN110187171A (en) * | 2019-06-25 | 2019-08-30 | 武汉阿迪克电子股份有限公司 | A kind of the LoRaWAN electric energy meter and method of network entry of quick networking mechanism |
| CN110716085A (en) * | 2019-11-11 | 2020-01-21 | 黑龙江省电工仪器仪表工程技术研究中心有限公司 | Single-phase electric energy meter with LoRa communication function |
| CN112068468A (en) * | 2020-08-27 | 2020-12-11 | 成都长城开发科技有限公司 | Closing control circuit and device of ammeter and ammeter |
| CN112068468B (en) * | 2020-08-27 | 2022-02-08 | 成都长城开发科技有限公司 | Closing control circuit and closing controller of ammeter, ammeter |
| CN113365370A (en) * | 2021-05-24 | 2021-09-07 | 内蒙古工业大学 | Intelligent mobile system based on LoRa technique |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108957080A (en) | A kind of single-phase pre-payment electric energy meter based on the LoRa communication technology | |
| CN208401842U (en) | A kind of 230MHz LoRa built-in module meeting southern network mark standard | |
| CN204884143U (en) | Special change communication device that no public network signal covered | |
| CN205265682U (en) | Wireless communicator | |
| CN204795037U (en) | Big dipper portable terminal with wireless function of charging | |
| CN105914535A (en) | Intelligent socket and interactive terminal device | |
| CN203325173U (en) | Intelligent watt-hour meter wireless communication module | |
| CN205790754U (en) | Smart jack and interactive terminal facility | |
| CN204680190U (en) | A kind of Automatic meter reading system | |
| CN206226125U (en) | Transformer terminal unit with Quick Response Code inspection function | |
| CN203364899U (en) | Passive wireless concentrated data collection gas meter | |
| CN205826856U (en) | With intelligent electric meter during electric wave school | |
| CN209748599U (en) | Pre-payment wireless remote water meter based on NB-IOT technology | |
| CN207468739U (en) | A kind of solar energy radio cathodic protection stake | |
| CN209472618U (en) | The wireless communication module of ammeter | |
| CN204596132U (en) | A kind of repeater movement circuit being applicable to gas meter, flow meter remote meter reading | |
| CN204330170U (en) | High pressure passive and wireless temp measuring system | |
| CN208506928U (en) | A kind of cigarette induction device based on NB-IOT | |
| CN207283542U (en) | A kind of LoRa communication modules | |
| CN206849258U (en) | A kind of wireless kilowatt meter reading-out system based on Zigbee | |
| CN204596134U (en) | A kind of portable gas meter, flow meter kilowatt meter reading-out system | |
| CN101232403A (en) | Integrated machine monitor terminal based on GPRS | |
| CN205210639U (en) | A controlling means that is used for wisdom house to have distribution to protect and gateway wireless teletransmission in center | |
| CN212435702U (en) | Electric power acquisition terminal with bluetooth communication function | |
| CN104240483A (en) | Self-service meter reading and recharging repeater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |