CN106093564A - A kind of intelligent electric energy meter based on cloud service - Google Patents
A kind of intelligent electric energy meter based on cloud service Download PDFInfo
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- CN106093564A CN106093564A CN201610597483.7A CN201610597483A CN106093564A CN 106093564 A CN106093564 A CN 106093564A CN 201610597483 A CN201610597483 A CN 201610597483A CN 106093564 A CN106093564 A CN 106093564A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
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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
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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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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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a kind of intelligent electric energy meter based on cloud service, including master controller and the keyboard input module, display module, LED light and the memory module that are connected with master controller, also include: be connected to the voltage sampling circuit between user load and described master controller, current sampling circuit and signal amplification circuit, frequency detection circuit, and be connected with described master controller and for carrying out the communication interface of data interaction with external communication module.The electric energy meter that the present invention provides can measure all parameters of electric power in real time, such as three-phase voltage, electric current, meritorious, reactive power, requirement, electric degree, harmonic wave;There is multi tariff, switching value monitoring, remote control output, logout, the out-of-limit function of definite value, by cloud service technology, intelligent electric meter can be allowed to realize installing, debugging and be connected to wide area network gateway, user can check the electricity consumption data of needs by browser WEB, microblogging, mobile phone A PP, and data formulate scientific and reasonable energy-saving and emission-reduction scheme after analysis.
Description
Technical field
The invention belongs to intelligent electric meter technical field, more particularly, to a kind of intelligent electric energy meter based on cloud service.
Background technology
Disposing of intelligent electric meter needs suitable communication infrastructure to realize the communication between equipment, including communication line concentration
Device, indoor display system and other equipment, and the deployment that these buildings are intelligent electric meter brings challenge.Under normal circumstances,
It is internal and be contained in space and in the public territory of limited, the most difficult contact of user, or may be distributed in that instrument does not all reside at apartment
Around apartment.
Summary of the invention
For the defect of prior art, it is an object of the invention to provide a kind of intelligent electric energy meter based on cloud service, purport
Wide area network is not can connect to, it is impossible to by mobile phone A PP, browser WEB, microblogging checks electric energy meter data solving tradition electric energy meter
Technology.
The invention provides a kind of intelligent electric energy meter based on cloud service, including master controller and with described master controller
Keyboard input module, display module, LED light and the memory module connected, also includes: be connected to user load and described master
Voltage sampling circuit, current sampling circuit and signal amplification circuit between controller, frequency detection circuit, and with described master
Controller connects and for carrying out the communication interface of data interaction with external communication module.Owing to voltage signal is sinusoidal wave, frequently
Rate testing circuit is used to the frequency of measurement voltage signal it is known that this frequency, by can be calculated the cycle of voltage signal, just
Can count voltage sample, counting of current sample controls accurately, and the sampled value obtained sends into the ADC of MCU,
Accurate magnitude of voltage, current value is obtained by Fourier transformation.
Owing to the data of tradition electric energy meter can only on-the-spot read, or consulted by the reading of background monitoring software, but pass through
The intelligent electric energy meter based on cloud service that the present invention provides, user can consult data whenever and wherever possible, obtains data path and becomes many.
Further, described voltage sampling circuit includes: voltage transformer T3, is sequentially connected in series in A phase voltage defeated
Enter to hold VA and described voltage transformer T3 armature winding Same Name of Ends between resistance R86, resistance R87, resistance R85, resistance
R84 and resistance R83, the different name end of the armature winding of described voltage transformer T3 connects neutral point VN, and one end is mutual with described voltage
The Same Name of Ends of the secondary windings of sensor T3 connects and the other end is connected with the different name end of the secondary windings of described voltage transformer T3
Resistance R82, the electric capacity C292 being connected in parallel with described resistance R82.
Further, described current sampling circuit includes: current transformer T6, resistance RV11, resistance RV12, resistance
R160 and electric capacity C295;The Same Name of Ends of armature winding of described current transformer T6 is connected with the Same Name of Ends of secondary windings, described
The different name end of the armature winding of current transformer T6 is connected with the different name end of secondary windings;One end of described resistance RV11 connects institute
State the Same Name of Ends of the secondary windings of current transformer T6, the other end of resistance RV11 connect the secondary of described current transformer T6 around
The different name end of group;Described resistance RV12 is connected in parallel with described resistance RV11;Described resistance R160 is in parallel with described resistance RV12
Connect;Described electric capacity C295 is connected in parallel with described resistance R160.
Further, described signal amplification circuit includes: operational amplifier U26, resistance R30, resistance R31, resistance
R32, resistance R33, resistance R34, resistance R35, resistance R36, electric capacity C237, electric capacity C238, electric capacity C239, electric capacity C240, electric capacity
C241, electric capacity C242, electric capacity C243, electric capacity C259, inductance H6;The normal phase input end of described operational amplifier U26 is by successively
On the resistance R35 being connected in series and resistance R30 connection sampling resistor, voltage signal is on the occasion of VA+, and described operational amplifier U26's is anti-
Phase input connects voltage signal negative value VA-on sampling resistor by the resistance R36 being sequentially connected in series and resistance R33;Described
Resistance R35 and described resistance R30 is connected in series end by electric capacity C240 ground connection, described resistance R35 and the string of described resistance R30
Connection connects end and is connected in series end also by what resistance R31 was connected to reference voltage VREF, described resistance R35 and described resistance R30
Also by electric capacity C238 ground connection;Described electric capacity C243 is connected in parallel with described resistance R31;Described resistance R36 and described resistance R33
Be connected in series end by electric capacity C241 ground connection, be connected to the outfan of described operational amplifier U26 also by resistance R32;Institute
State electric capacity C237 to be connected in parallel with described resistance R32;One end of described electric capacity C242 is connected to described resistance R35 and described electricity
Resistance R30 is connected in series end, and the other end of described electric capacity C242 is connected to the series connection of described resistance R36 and described resistance R33 even
Connect end;The power end of described operational amplifier U26 is connected to power supply VCC, the power supply of described operational amplifier U26 by inductance H6
End is also by electric capacity C259 ground connection;The outfan of described operational amplifier U26 is connected to VA by resistance R34;Electric capacity C239 mono-
End is connected to VA, other end ground connection.
Further, the times magnification of signal amplification circuit is adjusted by adjusting the ratio of resistance R32 and resistance R33
Number.
Further, described frequency detection circuit includes: comparator U23, resistance R166, resistance R167, resistance R168,
Resistance R169, resistance R170, electric capacity C299 and electric capacity C300;The reverse input end of described comparator U23 passes through the company of being sequentially connected in series
The resistance R167 connect and resistance R166 is connected to frequency signal sampled point MF (measure frequency), described comparator U23
Positive input by resistance R169 connect reference voltage VREF;Described resistance R167 and described resistance R166 is connected in series
End is by electric capacity C299 ground connection;One end of described resistance R168 is connected to the reverse input end of described comparator U23, described resistance
The other end of R168 is connected to the outfan of described comparator U23, and described electric capacity C300 is connected in parallel with described resistance R168;Institute
The outfan stating comparator U23 connects described resistance R170.
Further, the frequency range of described frequency detection circuit detection is 45Hz~55Hz.
Further, described communication interface is UART communication interface.
The electric energy meter that the present invention provides can measure all parameters of electric power in real time, such as three-phase voltage, electric current, meritorious, idle merit
Rate, requirement, electric degree, harmonic wave;There is multi tariff, switching value monitoring, remote control output, logout, the out-of-limit function of definite value, pass through cloud
Service technology, it is possible to allow intelligent electric meter realize install, debug and be connected to wide area network gateway, user can pass through browser WEB,
Microblogging, mobile phone A PP check the electricity consumption data of needs, and data formulate scientific and reasonable energy-saving and emission-reduction scheme after analysis.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the intelligent electric meter that the present invention provides;
Fig. 2 is the circuit theory diagrams of voltage sampling circuit in the intelligent electric meter that the present invention provides;
Fig. 3 is the circuit theory diagrams of current sampling circuit in the intelligent electric meter that the present invention provides;
Fig. 4 is the circuit theory diagrams of signal amplification circuit in the intelligent electric meter that the present invention provides;
Fig. 5 is the circuit theory diagrams of the intelligent electric meter medium frequency testing circuit that the present invention provides;
Fig. 6 is the circuit theory diagrams of communication interface circuit in the intelligent electric meter that the present invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
Under normal circumstances, instrument all do not reside at apartment internal and be contained in limited space, the most difficult contact of user public
In region, or being distributed in around apartment, user can not understand consumption information whenever and wherever possible, and effects of energy saving and emission reduction is inconspicuous.Logical
Cross cloud service technology, it is possible to allowing intelligent electric meter realize installing, debugging and be connected to wide area network gateway, user can pass through browser
WEB, microblogging, mobile phone A PP check the electricity consumption data of needs, and data formulate scientific and reasonable energy-saving and emission-reduction side after analysis
Case.By simple installation steps, the wisdom of building can be transferred and made it stand ready, as long as multitenant unit is mounted with
After this solution, other intelligent energy device can be installed at any time and use at any time, and can either install single intelligence
Energy energy source device, also can install in units of whole apartment simultaneously.Without this solution, energy supplier may
It is forced extra infrastructure is installed and carries out extra engineering construction, causes low return height to spend and make to client and house-owner
Become unnecessary puzzlement.
The electric energy meter that the embodiment of the present invention provides can measure all parameters of electric power in real time, such as three-phase voltage, electric current, gain merit,
Reactive power, requirement, electric degree, harmonic wave;There is multi tariff, switching value monitoring, remote control output, logout, the out-of-limit function of definite value,
By cloud service technology, it is possible to allowing intelligent electric meter realize installing, debugging and be connected to wide area network gateway, user can be by browsing
Device WEB, microblogging, mobile phone A PP check the electricity consumption data of needs, and data formulate scientific and reasonable energy-saving and emission-reduction side after analysis
Case.
The functional block diagram of the intelligent electric meter that the embodiment of the present invention provides is as it is shown in figure 1, intelligent electric energy meter based on cloud service
Keyboard input module, display module, LED light and the storage mould including master controller and being connected with described master controller
Block, it is characterised in that also include: be connected to the voltage sampling circuit between user load and described master controller, current sample
Circuit and signal amplification circuit, frequency detection circuit, and be connected with master controller and be used for and external communication module number
According to mutual communication interface.
Wherein, voltage sampling circuit is for being converted into small area analysis signal by ac phase voltage 220V.As the present invention one
Individual embodiment, voltage sampling circuit can use current type voltage transformer T3, and small area analysis signal is carried out Magnetic isolation, strengthens electricity
The safety of volt circuit, the current signal after isolation generates voltage signal after resistance R82, as operation amplifier circuit
Input is amplified.As in figure 2 it is shown, voltage sampling circuit includes: voltage transformer T3, it is sequentially connected in series at VA and described electricity
Resistance R86, resistance R87, resistance R85, resistance R84 and resistance R83 between the Same Name of Ends of the armature winding of pressure transformer T3, institute
The different name end of the armature winding stating voltage transformer T3 connects VN, and one end is of the same name with the secondary windings of described voltage transformer T3
The resistance R82 that end connects and the other end is connected with the different name end of the secondary windings of described voltage transformer T3, with described resistance R82
The electric capacity C292 being connected in parallel.
As one embodiment of the present of invention, current sampling circuit can use current transformer T6, by alternating current 5A
Becoming small area analysis signal through the current transformer T6 that no-load voltage ratio is 5A/5mA, small area analysis signal generates little electricity after resistance R160
Pressure signal, the input as operation amplifier circuit is amplified.As it is shown on figure 3, current sampling circuit includes: current transformer
T6, resistance RV11, resistance RV12, resistance R160 and electric capacity C295;The Same Name of Ends of the armature winding of current transformer T6 is with secondary
The Same Name of Ends of winding connects, and the different name end of the armature winding of current transformer T6 is connected with the different name end of secondary windings;Resistance
One end of RV11 connects the Same Name of Ends of the secondary windings of current transformer T6, and the other end of resistance RV11 connects current transformer T6
The different name end of secondary windings;Resistance RV12 is connected in parallel with resistance RV11;Resistance R160 is connected in parallel with resistance RV12;Electric capacity
C295 is connected in parallel with resistance R160.
As one embodiment of the present of invention, signal amplification circuit can pass through operation amplifier to use differential amplification mode
Device U26 is amplified voltage, current signal respectively, and as the input of A/D module, the amplification of signal is by adjusting R32/
The ratio of R33 realizes.
As shown in Figure 4, signal amplification circuit includes: operational amplifier U26, resistance R30, resistance R31, resistance R32, electricity
Resistance R33, resistance R34, resistance R35, resistance R36, electric capacity C237, electric capacity C238, electric capacity C239, electric capacity C240, electric capacity C241, electricity
Hold C242, electric capacity C243, electric capacity C259 and inductance H6;The normal phase input end of operational amplifier U26 is by being sequentially connected in series
Resistance R35 and resistance R30 connects VA+, and the inverting input of described operational amplifier U26 is by the resistance being sequentially connected in series
R36 and resistance R33 connects VA-;Resistance R35 and described resistance R30 is connected in series end by electric capacity C240 ground connection, described resistance
The end that is connected in series of R35 and described resistance R30 is connected to reference voltage VREF, described resistance R35 and described also by resistance R31
Resistance R30 is connected in series end also by electric capacity C238 ground connection;Described electric capacity C243 is connected in parallel with described resistance R31;Resistance
Being connected in series of R36 and described resistance R33 is held by electric capacity C241 ground connection, is connected to described operation amplifier also by resistance R32
The outfan of device U26;Described electric capacity C237 is connected in parallel with described resistance R32;One end of described electric capacity C242 is connected to described
Resistance R35 and described resistance R30 is connected in series end, and the other end of described electric capacity C242 is connected to described resistance R36 and described
Resistance R33 is connected in series end;The power end of operational amplifier U26 is connected to power supply VCC, described operation amplifier by inductance H6
The power end of device U26 is also by electric capacity C259 ground connection;The outfan of operational amplifier U26 is connected to VA by resistance R34;Electric capacity
C239 one end is connected to VA, other end ground connection.
As one embodiment of the present of invention, frequency detection circuit can use comparator U23.Owing to alternating voltage is just
String ripple, zero crossing fore-and-aft direction is contrary, therefore can carry out zero passage detection by comparator U23, it is achieved the inspection to electric voltage frequency
Surveying, detectable frequency range is: 45Hz~55Hz, and frequency detecting is to realize accurately measuring the basis of voltage, electric current.
In the principle design of this intelligent electric meter, frequency detection circuit is by detecting the moment of voltage over zero, it is thus achieved that detection
The frequency of voltage, communication interface circuit is by being connected with external communication module, it is achieved data interaction.
As it is shown in figure 5, frequency detection circuit includes: comparator U23, resistance R166, resistance R167, resistance R168, resistance
R169, resistance R170, electric capacity C299 and electric capacity C300;The reverse input end of comparator U23 is by the resistance being sequentially connected in series
R167 and resistance R166 is connected to MF, and the positive input of comparator U23 connects reference voltage VREF by resistance R169;Resistance
R167 and resistance R166 is connected in series end by electric capacity C299 ground connection;One end of resistance R168 is connected to the anti-of comparator U23
To input, the other end of resistance R168 is connected to the outfan of comparator U23, and electric capacity C300 is connected in parallel with resistance R168;
The outfan of comparator U23 connects resistance R170.
In embodiments of the present invention, communication interface can be UART communication interface, and concrete structure is as shown in Figure 6.Main control
Device carries out data interaction by UART communication interface and external communication module, and external communication module can be WiFi module, GPRS,
GSM, TDMA module, external module carries out data transmission with Cloud Server simultaneously, it is achieved it is clear that intelligence instrument data allow user pass through
Looking at device WEB, microblogging, mobile phone A PP to check the electricity consumption data of needs, data formulate scientific and reasonable energy-saving and emission-reduction after analysis
Scheme.
The cloud service intelligent electric meter that the present invention provides is a kind of innovation and application technology in intelligent grid, ideally by cloud service
Technology combines with intelligent power grid technology, brings cloud service industry into intelligent grid industry, and this project will be to intelligent grid
In industry, brand-new theory and Practical significance are brought in energy-saving and emission-reduction field, significantly drive innovation and development and the liter of intelligent electric meter industry
Level.
Cloud service intelligent electric meter makes people understand consumption information whenever and wherever possible, can pass through again web browser or microblogging simultaneously
Issuing green information Deng Mobile Transmission means, the social affiliated person of preliminary realization shares data, and can degree of depth development of latent energy-saving potential.Do
This project good will greatly improve energy-saving and emission-reduction operation level and society's people's livelihood harmonious development from user terminal, thus be that China is real
Existing energy-conserving and environment-protective cause and high-quality GDP make tremendous contribution.
This intelligent electric energy meter is opened for power system, industrial and mining establishment, communal facility, intelligent building, energy conservation, mesolow
Close the power monitoring demand of cabinet and design.
As it will be easily appreciated by one skilled in the art that and the foregoing is only presently preferred embodiments of the present invention, not in order to
Limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, all should comprise
Within protection scope of the present invention.
Claims (8)
1. an intelligent electric energy meter based on cloud service, including master controller and the key-press input that is connected with described master controller
Module, display module, LED light and memory module, it is characterised in that also include: be connected to user load and described master control
Voltage sampling circuit, current sampling circuit and signal amplification circuit between device processed, frequency detection circuit, and with described master control
Device processed connects and for carrying out the communication interface of data interaction with external communication module.
2. intelligent electric energy meter as claimed in claim 1, it is characterised in that described voltage sampling circuit includes: voltage transformer
T3, is sequentially connected in series the electricity between the Same Name of Ends of the armature winding of A phase voltage input VA and described voltage transformer T3
Resistance R86, resistance R87, resistance R85, resistance R84 and resistance R83, the different name end of the armature winding of described voltage transformer T3 connects
Neutral point VN, one end is connected with the Same Name of Ends of the secondary windings of described voltage transformer T3 and the other end and described voltage transformer
The resistance R82, the electric capacity C292 being connected in parallel with described resistance R82 that the different name end of the secondary windings of T3 connects.
3. intelligent electric energy meter as claimed in claim 1, it is characterised in that described current sampling circuit includes: current transformer
T6, resistance RV11, resistance RV12, resistance R160 and electric capacity C295;
The Same Name of Ends of armature winding of described current transformer T6 is connected with the Same Name of Ends of secondary windings, described current transformer T6
The different name end of armature winding be connected with the different name end of secondary windings;
One end of described resistance RV11 connects the Same Name of Ends of the secondary windings of described current transformer T6, the other end of resistance RV11
Connect the different name end of the secondary windings of described current transformer T6;
Described resistance RV12 is connected in parallel with described resistance RV11;
Described resistance R160 is connected in parallel with described resistance RV12;
Described electric capacity C295 is connected in parallel with described resistance R160.
4. the intelligent electric energy meter as described in any one of claim 1-3, it is characterised in that described signal amplification circuit includes: fortune
Calculate amplifier U26, resistance R30, resistance R31, resistance R32, resistance R33, resistance R34, resistance R35, resistance R36, electric capacity C237,
Electric capacity C238, electric capacity C239, electric capacity C240, electric capacity C241, electric capacity C242, electric capacity C243, electric capacity C259, inductance H6
The normal phase input end of described operational amplifier U26 connects sampling electricity by the resistance R35 being sequentially connected in series and resistance R30
In resistance, voltage signal is on the occasion of VA+, the inverting input of described operational amplifier U26 by the resistance R36 being sequentially connected in series and
Resistance R33 connects voltage signal negative value VA-on sampling resistor;
Described resistance R35 and described resistance R30 is connected in series end by electric capacity C240 ground connection, described resistance R35 and described electricity
The end that is connected in series of resistance R30 is connected to reference voltage VREF, described resistance R35 and the string of described resistance R30 also by resistance R31
Connection connects end also by electric capacity C238 ground connection;Described electric capacity C243 is connected in parallel with described resistance R31;
Being connected in series of described resistance R36 and described resistance R33 is held by electric capacity C241 ground connection, is connected to also by resistance R32
The outfan of described operational amplifier U26;Described electric capacity C237 is connected in parallel with described resistance R32;The one of described electric capacity C242
End is connected to the end that is connected in series of described resistance R35 and described resistance R30, and the other end of described electric capacity C242 is connected to described electricity
Resistance R36 and described resistance R33 is connected in series end;
The power end of described operational amplifier U26 is connected to power supply VCC, the power supply of described operational amplifier U26 by inductance H6
End is also by electric capacity C259 ground connection;
The outfan of described operational amplifier U26 is connected to VA by resistance R34;Electric capacity C239 one end is connected to VA, the other end
Ground connection.
5. intelligent electric energy meter as claimed in claim 4, it is characterised in that come by adjusting the ratio of resistance R32 and resistance R33
Adjust the amplification of signal amplification circuit.
6. the intelligent electric energy meter as described in any one of claim 1-3, it is characterised in that described frequency detection circuit includes: ratio
Relatively device U23, resistance R166, resistance R167, resistance R168, resistance R169, resistance R170, electric capacity C299 and electric capacity C300;
The reverse input end of described comparator U23 is connected to frequency by the resistance R167 being sequentially connected in series and resistance R166 to be believed
Number sampled point MF, the positive input of described comparator U23 connects reference voltage VREF by resistance R169;
Described resistance R167 and described resistance R166 is connected in series end by electric capacity C299 ground connection;
One end of described resistance R168 is connected to the reverse input end of described comparator U23, and the other end of described resistance R168 is even
Being connected to the outfan of described comparator U23, described electric capacity C300 is connected in parallel with described resistance R168;
The outfan of described comparator U23 connects described resistance R170.
7. intelligent electric energy meter as claimed in claim 6, it is characterised in that the frequency range of described frequency detection circuit detection is
45Hz~55Hz.
8. the intelligent electric energy meter as described in any one of claim 1-7, it is characterised in that described communication interface is that UART communication connects
Mouthful.
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CN204964613U (en) * | 2015-09-06 | 2016-01-13 | 艾德克斯电子(南京)有限公司 | Zero -cross detection circuit |
CN105548656A (en) * | 2015-12-04 | 2016-05-04 | 珠海万力达电气自动化有限公司 | Direct current high voltage isolation sampling circuit |
CN105513328A (en) * | 2016-01-28 | 2016-04-20 | 钦州学院 | Electric meter system based on Wifi cloud services |
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