CN109959821A - A kind of high-precision intelligent ammeter based on current divider - Google Patents
A kind of high-precision intelligent ammeter based on current divider Download PDFInfo
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- CN109959821A CN109959821A CN201811183455.6A CN201811183455A CN109959821A CN 109959821 A CN109959821 A CN 109959821A CN 201811183455 A CN201811183455 A CN 201811183455A CN 109959821 A CN109959821 A CN 109959821A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
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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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Abstract
The present invention relates to a kind of high-precision intelligent ammeter based on current divider, the intelligent electric meter includes: an ic for energy metering, the ic for energy metering includes the double manganese copper diverters of a series connection, one microcomputer data processing circuit, wherein, double manganese copper diverters of connecting include a pair of copper-manganese shunting body, double copper-manganese shunting bodies are in series by one first copper-manganese shunting body and one second copper-manganese shunting body, circuit small current is realized by ic for energy metering, high current is segmented precise measurement, improve the measurement accuracy of intelligent electric meter, and it can be wirelessly communicated by NB-IoT and to form Internet of Things intelligent electric meter terminal.
Description
Technical field
The present invention relates to the intelligent electric meters of Internet of Things application, more particularly, to a kind of high-precision intelligent electricity based on current divider
Table.
Background technique
It is all to use a manganese copper diverter current loop sample resistance in domestic and international existing single-phase intelligent ammeter, as
Intelligent electric meter current sampling or the device of sampling；The copper-manganese of corresponding one different resistance values of the intelligent electric meter product of different current specifications
Current divider, as shown in Figure 1, Fig. 1 is the manganese copper diverter basic block diagram in existing intelligent electric meter；Copper-manganese in the prior art point
Stream device is by the first red copper shunting body, copper-manganese shunting body, and the second red copper shunting body composition, copper-manganese shunting body both ends are provided with sampling
Connecting terminal a, b, the first red copper shunting body are provided with connecting terminal e；The first red copper shunting body, copper-manganese shunting body,
Two red copper shunting bodies are integrally welded between each other, and composition one has the manganese copper diverter of low-resistance value.
Manganese copper diverter in the single-phase intelligent ammeter of existing different size, if specification is the intelligent electric meter of 5 (60) A,
That is rated current IbThe corresponding single-phase intelligent ammeter of=5A, maximum current Imax=60A, voltage U=220VAC is 250 μ Ω
Manganese copper diverter；But the manganese copper diverter of a 250 μ Ω is selected, in single-phase intelligent meter circuit, electric energy computation chip
Starting current wants >=0.004Ib, that is to say, that the starting current of electric energy computation chip is less than 0.004IbOr load consuming power
The intelligent electric meter can not be measured normally when less than 5W；In other words, since the analog input end of electric energy computation chip has imbalance electricity
Pressure, when the low current that manganese copper diverter passes through is formed by pressure drop < 5mV, electric energy computation chip can not reliably offer an explanation metering, lead
It is larger to send a telegraph table measurement error, in turn results in expense calculating and actual cost is not inconsistent.
It is that those skilled in the art need in view of this, designing a kind of technical solution for improving intelligent electric meter measurement accuracy
The technical issues of solution.
Summary of the invention
The not high technical problem of measuring accuracy in order to solve intelligent electric meter in the prior art, the present invention provide one kind and are based on
The high-precision intelligent ammeter of current divider, the intelligent electric meter include an ic for energy metering, and the ic for energy metering includes one
The double manganese copper diverters of series connection；One microcomputer data processing circuit；Wherein, double manganese copper diverters of connecting include a pair of copper-manganese
Shunting body, double copper-manganese shunting bodies are in series by one first copper-manganese shunting body and one second copper-manganese shunting body.
Further, double manganese copper diverters of connecting further include the first red copper shunting body, the second red copper shunting body,
In, double copper-manganese shunting bodies by welding manner be arranged the first red copper shunting body and the second red copper shunting body it
Between.
Further, double copper-manganese shunting bodies include three terminals a, b, c, the terminals a and the wiring
End c is located at the both ends of the copper-manganese shunting body.
Further, described three terminals a, b, c are located at the ipsilateral or two sides of double copper-manganese shunting bodies.
Further, the terminals b is located on the copper-manganese shunting body central axis, the terminals a and described
Solution line end c is located at the both ends of the copper-manganese shunting body, and first copper-manganese is formed between the terminals a and the terminals b
Shunting body forms the second copper-manganese shunting body between the terminals b and the terminals c.
Further, a through-hole is set on the first copper-manganese shunting body and the second copper-manganese shunting body, for changing
Power transformation flow distribution.
Further, the ic for energy metering includes: one first electric energy computation chip, have a first input end and
One first communication interface；One second electric energy computation chip has one second input terminal and one second communication interface；
Wherein, the first copper-manganese shunting body is coupled to the first input end of first electric energy computation chip, uses
In one first electric current of detection；The first copper-manganese shunting body and the second copper-manganese shunting body coupled in series are to second electric energy
Second input terminal of metering chip, for detecting one second electric current, second electric current is less than first electric current.
Further, a magnetic latching relay is coupled to the microcomputer data processing circuit, and the magnetic is kept
Relay is controlled by the microcomputer data processing circuit；One Current Mutual Inductance coil is coupled to the first electrical energy measurement core
Piece, for preventing stealing.
Further, the ic for energy metering may also be configured to only have a third electric energy computation chip, institute
The first electric energy computation chip is stated with the first analog input end and the second analog input end and communication interface；The magnetic keeps relay
Device is coupled to the microcomputer processing circuit, and the magnetic latching relay is by the microcomputer processing circuit controls；
Wherein, the first copper-manganese shunting body is coupled to second analog input end, for detecting a third electric current；Institute
The first copper-manganese shunting body and the second copper-manganese shunting body coupled in series are stated to second analog input end, for detecting one the
Four electric currents, the 4th electric current are less than the third electric current.
Further, the microcomputer processing circuit includes: a microprocessor, the double isolation communication electricity of an optical coupling
Road, an isolation regulated power supply, a NB-IOT radio communication circuit, one drive circuit；Wherein, one driving of microprocessor connection
Circuit；The double isolation telecommunication circuits of the optical coupling are coupled to the ic for energy metering；
The driving circuit is coupled to the magnetic latching relay.
Wherein isolation regulated power supply is used for as the electric current of load circuit with stable.
It should be understood that above-mentioned each technical characteristic of the invention and having in below (eg embodiment) within the scope of the present invention
It can be combined with each other between each technical characteristic of body description, to form a new or preferred technical solution.As space is limited, exist
This no longer tires out one by one states.
By the technical solution of the above-mentioned high-precision intelligent ammeter based on current divider, the present invention is by based on double copper-manganeses of connecting
Intelligent electric meter composed by the ic for energy metering of current divider, microcomputer data processing circuit, using connecting, double copper-manganeses are shunted
Device and ic for energy metering realize that circuit small current, high current are segmented precise measurement, and can be by microcomputer at
NB-IoT wirelessly communicates to form Internet of Things intelligent electric meter terminal in reason circuit, and user is facilitated to check the electricity of consumption at any time.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the manganese copper diverter basic block diagram in existing intelligent electric meter；
Fig. 2 is double manganese copper diverter structure charts provided by the present invention of connecting；
Fig. 3 is that embodiment one provided by the present invention double manganese copper diverter current loops sampling intelligent ammeter modules of connecting are former
Reason figure；
Fig. 4 is that embodiment two provided by the present invention double manganese copper diverter current loops sampling intelligent ammeter modules of connecting are former
Reason figure.
Specific embodiment
The specific embodiment that the invention will now be described in detail with reference to the accompanying drawings.However, the present invention should be understood as to not office
It is limited to this embodiment described below, and technical concept of the invention can be with other well-known techniques or function and those
The identical other technologies combination of well-known technique is implemented.
In the explanation of following specific embodiments, structure and working method of the invention in order to clearly demonstrate will be by all
Multidirectional word is described, but should by "front", "rear", "left", "right", "outside", "inner", " outside ", " inside ",
The Word Understandings such as " axial direction ", " radial direction " are not construed as word of limitation for convenience of term.
It is described further with reference to the accompanying drawing.
As shown in Fig. 2, double manganese copper diverter structure charts provided by the present invention of connecting, including the first red copper shunting body 10,
Double copper-manganese shunting bodies 20, the second red copper shunting body 30 are formed；Wherein be provided on double copper-manganese shunting bodies 20 connecting terminal a, b,
C, wherein connecting terminal a, b, c can be distributed in the same side or two sides of double copper-manganese shunting bodies 20, and preferably selection is wherein
One connecting terminal is located at longitudinal center's separator bar of double copper-manganese shunting bodies 20；Wherein formed between terminals a and terminals b
First copper-manganese shunting body 20-1 forms the second copper-manganese shunting body 20-2, the first copper-manganese shunting body between terminals b and terminals c
20-1 and the second copper-manganese shunting body 20-2 is composed in series double copper-manganese shunting bodies 20.
Wherein, double copper-manganese shunting bodies 20 have the through-hole d of 2 change current distributions, and through-hole d is in double 20 sizes of copper-manganese shunting body
One fixs the resistance value that can finely tune shunting body, and the diameter of through-hole d is bigger, and the resistance value of double copper-manganese shunting bodies 20 is bigger, Jin Erti
The consistency that high current is distributed in double copper-manganese shunting bodies 20, namely improve the first copper-manganese shunting body 20-1 and the shunting of the second copper-manganese
The equivalent resistance of body 20-2, while improving the resolution ratio and essence of the first copper-manganese shunting body 20-1 and the second copper-manganese shunting body 20-2
Degree.
Fig. 2 (b) is the cross-sectional view in the direction Fig. 2 (a) Section line A-A, shows that through-hole d is optimal in figure and is located at the shunting of the first copper-manganese
The center of body 20-1 and the second copper-manganese shunting body 20-2, but it is also not necessarily limited to this position.
As shown in figure 3, being that the embodiment of the present invention one is connected double manganese copper diverter current loops sampling intelligent electric meter circuits
Schematic diagram, the intelligent electric meter circuit diagram as composed by ic for energy metering 100, microcomputer data processing circuit 200.
The ic for energy metering 100, by the double manganese copper diverters, the first electric energy computation chip RN1, the second electric energy of connecting
Metering chip RN2, magnetic latching relay J50, Current Mutual Inductance coil CT composition, wherein the first electric energy computation chip RN1 has the
One input terminal and the first communication interface, herein first input end be the first electric energy computation chip RN1 analog input end V1N,
V1P, the first communication interface are communication interface UART (1), and the second electric energy computation chip RN2 is logical with the second input terminal and second
Believe that interface, the second input terminal are analog input end V1N, V1P of the second electric energy computation chip RN2, the second communication interface is second
The communication interface UART (2) of electric energy computation chip RN2；Magnetic latching relay (J50), it is coupled to microcomputer processing circuit 200,
And magnetic latching relay (J50) controlled by microcomputer processing circuit 200.
The equivalent copper-manganese resistance R of first copper-manganese shunting body 20-120-1Be coupled to the first electric energy computation chip RN1 first is defeated
Enter end, for detecting one first electric current；First copper-manganese shunting body 20-1 and the second copper-manganese shunting body 20-2 series equivalent are
Institute is coupled to after the series connection of copper-manganese resistance R20-1 and copper-manganese resistance R20-2, copper-manganese resistance R20-1 and copper-manganese resistance R20-2 series connection
The second input terminal of the second electric energy computation chip RN2 is stated, for detecting one second electric current, wherein the second electric current is less than described the
One electric current, intelligent electric energy meter realize the size of electric current in areal survey circuit.
Ic for energy metering further include: crystal oscillator Z1 and Z2, resistance R1-R14, resistance R1-8, copper-manganese resistance R20-1, copper-manganese electricity
Hinder R20-2, capacitor C1-C6, capacitor C16-C19；The copper-manganese resistance R20-1For the equivalent resistance of the first copper-manganese shunting body 20-1,
Copper-manganese resistance R20-2For the equivalent resistance of the second copper-manganese shunting body 20-2.
Terminals a, b, c of double copper-manganese shunting bodies 20 respectively correspond copper-manganese resistance R20-1The end a and the end b and copper-manganese electricity
Hinder the end b and the end c of R20-2.Wherein, a termination power phase line L input terminal of copper-manganese resistance R20-1；First electric energy computation chip
First input end V1N, V1P of RN1 is connected respectively to copper-manganese resistance R by resistance R2, R120-1The end a and the end b, detection first
Electric current namely rated current IbTo the current value between Imax, wherein capacitor C1, C2 is filter capacitor；Second electric energy computation chip
Second input terminal V1N, V1P of RN2 is connected respectively to copper-manganese resistance R by R12, R1120-1The end a and copper-manganese resistance R20-2C
End detects the second electric current namely minimum starting current 0.001IbTo specified IbBetween current value, wherein capacitor C16, C17 be
Filter capacitor；The second of the first communication interface UART (1) and the second electric energy computation chip RN2 of first electric energy computation chip RN1
Communication interface UART (2) is separately connected the double isolation telecommunication circuit IC2's of optical coupling in microcomputer data processing circuit 200
RXD1, TXD1 and RXD2, the end TXD2；The resistance coupled with the first electric energy computation chip RN1 and the second electric energy computation chip RN2
R1-8It is voltage acquisition divider resistance, is to be composed in series 1M-2M ohm of resistance by 6-8 resistance, and by R1-8With R7, R13
Be composed in series low-voltage output, by the first electric energy computation chip RN1 the end V3P and the second electric energy computation chip RN2 the end V2P into
Row voltage acquisition；The ground terminal of voltage acquisition is the end V3N and the second electric energy computation chip by the first electric energy computation chip RN1
The end V2N of RN2 is grounded by R8, R14, and wherein capacitor C5, C6, C18, C19 in voltage collection circuit are filter capacitors；It is described
Current Mutual Inductance coil CT be the electric current detected on power line zero curve N, and by resistance R3, R4, R5, R6, capacitor C3, C4 connect
The end V2P, V2N for being connected to the first electric energy computation chip RN1 forms thief-proof power detection circuit；The magnetic latching relay J50It is intelligence
That installs inside energy ammeter takes control power supply master control switch；Magnetic latching relay J50It is by the core microprocessors in intelligent electric meter
IC1 carries out driven management, solves the power supply state of remote control intelligent electric meter outlet user load.
The microcomputer data processing circuit 200 is by microprocessor IC1, the double isolation telecommunication circuits of optical coupling
IC2, isolation regulated power supply WA1, NB-IOT radio communication circuit, driving circuit composition；In addition microcomputer data processing circuit
200 can also include the peripheral circuit of microprocessor IC1, and peripheral circuit oneself is selected according to demand, be may include spare
Power Management Unit, isolation RS 485 unit, infrared communication circuit, time circuit, temperature sensor circuit, memory circuit, number
According to safe ESAM circuit, LCD are shown, keyboard is formed.
Wherein, the microprocessor IC1 connection driving circuit；The double isolation telecommunication circuit IC2 of optical coupling are coupled to electric energy meter
Measure circuit 100；Driving circuit is coupled to the magnetic latching relay J50。
The microprocessor IC1 is the low-power consumption microprocessor of 16 bit, and the SPI communication interface of microprocessor IC1 connects NB-
IOT radio communication circuit, it is by gating the first electrical energy measurement core that KZ mouthfuls of low and high levels in telecommunication circuit IC2, which are isolated, in optical coupling pair
The the second communication interface UART (2) and micro process of the first communication interface UART (1) and the second electric energy computation chip RN2 of piece RN1
The port UART2 of device IC1 carries out alternately switching communication, realizes the function of intelligent electric meter areal survey current；Microprocessor
The I/O mouth connection driving circuit of IC1 drives magnetic latching relay J50On and off.
Wherein, microprocessor IC1 is separately connected time circuit, temperature sensor circuit, memory electricity by interface peripherals
Road, infrared communication circuit, isolation RS 485, the connection backup power source management of ADC analog/digital conversion interface and data safety circuit.
As shown in figure 4, being that embodiment two provided by the invention is connected double manganese copper diverter current loops sampling intelligent electric meters
Circuit diagram, as composed by double manganese copper diverter ic for energy metering 100 of connecting, microcomputer data processing circuit 200
Intelligent electric meter circuit diagram.
The embodiment and embodiment one are the difference is that use an ic for energy metering, the first copper-manganese in this fact Example
Shunting body 20-1 and the second copper-manganese shunting body 20-2 are connect with the same ic for energy metering difference analog input end respectively.In order to
Clearer description embodiment, by the port of third electric energy computation chip RN3 in the ic for energy metering in the present embodiment
V1N, V1P and V2N, V2P are named as the first analog input end and the second analog input end, two segmented currents point of measurement
Not Wei third electric current and the 4th electric current, the first electric current and the second electric current being equivalent in embodiment one.
Ic for energy metering 100 is only by third electric energy computation chip RN3, crystal oscillator Z1, a resistance R1-R8, resistance
R1-8, copper-manganese resistance R20-1, copper-manganese resistance R20-2, capacitor C1-C15, magnetic latching relay J50It is formed；Third electrical energy measurement core
Piece RN3 has the first analog input end and the second analog input end and communication interface, wherein first analog input end V1N, V1P；
Second analog input end is V2P, V2N；Identical in the equivalent and embodiment one of double copper-manganese shunting bodies 20, details are not described herein again.
The copper-manganese resistance R20-1For the equivalent resistance of the first copper-manganese shunting body 20-1, copper-manganese resistance R20-2For copper-manganese point
The equivalent resistance of fluid 20-2, and copper-manganese resistance R20-1A termination power phase line L input terminal；First electrical energy measurement
First analog input end V1N, V1P of chip RN1 is connected respectively to copper-manganese resistance R by resistance R2, R120-1The end a and copper-manganese
Resistance R20-2The end c, detect the 4th electric current minimum starting current 0.001IbTo specified IbBetween current value, wherein capacitor C1,
C2 is filter capacitor；Second analog input end V2N, V2P of the first electric energy computation chip RN1 is connected respectively by R4, R3
It is connected to copper-manganese resistance R20-1The end a and the end b, detect the 4th electric current namely rated current IbTo the current value between Imax, wherein
Capacitor C3, C4 are filter capacitors；Using the current in segmentation detection circuit, accuracy when intelligent electric meter measurement is improved.
Telecommunication circuit IC2 connection microprocessor is isolated by optical coupling in third electric energy computation chip RN3 communication interface UART
The port UART2 of IC1；The resistance R coupled with the interface of third electric energy computation chip RN31-8It is voltage acquisition divider resistance, is
1M-2M ohm of resistance, and R are composed in series by 6-8 resistance1-8It is composed in series low-voltage output with R5, by the first electric energy meter
The port V3P for measuring chip RN1 carries out voltage acquisition；The ground terminal of voltage acquisition is by the port of third electric energy computation chip RN3
V3N is grounded by resistance R6, and wherein capacitor C5, C6 in voltage collection circuit are filter capacitors；The magnetic latching relay
J50It is the expense control power supply master control switch installed inside intelligent electric meter, magnetic latching relay J50It is by the core in intelligent electric meter
Microprocessor IC1 carries out driven management, solves the power supply state of remote control intelligent electric meter outlet user load.
Microcomputer data processing circuit 200 and embodiment one the difference is that, the double isolation telecommunication circuits of optical coupling
KZ mouthfuls of low and high levels are first analog input end V1N, V1P and the second mould by gating third electric energy computation chip RN3 in IC2
Quasi- input terminal V2N, V2P carry out replacing switching communication with the port UART2 of microprocessor IC1, realize intelligent electric meter areal survey
The function of current.
The present invention proposes ic for energy metering 100, microcomputer data processing circuit based on double manganese copper diverters of connecting
Intelligent electric meter composed by 200, using double manganese copper diverters and the ic for energy metering realization circuit small current, big electricity of connecting
Flow point section precise measurement, improves the measurement accuracy of intelligent electric meter, at the same can by NB-IoT in microcomputer processing circuit without
Line communicates to form Internet of Things intelligent electric meter terminal.
Unless otherwise instructed, the herein presented qualifier similar to " first ", " second " is not meant that suitable to the time
The restriction of sequence, quantity or importance, and be used for the purpose of the technical characteristic and another technology in the technical program
Feature is mutually distinguished.Similarly, the herein presented qualifier similar to " one " does not mean that the restriction to quantity, but describes
The technical characteristic not occurred above.Similarly, what is occurred before number herein is similar to " about ", " approximatively "
Modifier generally comprises this number, and its specific meaning should understand in conjunction with context meaning.Similarly, only have specific
Otherwise the noun of quantity quantifier modification should be regarded as again including plural form comprising singular, herein in the technology
It can include the odd number technical characteristic in scheme, also may include a plurality of technical characteristics.
It is preferred embodiment of the invention described in this specification, above embodiments are only to illustrate the present invention
Technical solution rather than limitation of the present invention.All those skilled in the art pass through logic analysis, reasoning under this invention's idea
Or the limited available technical solution of experiment, it all should be within the scope of the present invention.
Claims (10)
1. a kind of high-precision intelligent ammeter based on current divider, which is characterized in that the intelligent electric meter includes:
One ic for energy metering, the ic for energy metering include the double manganese copper diverters of a series connection；
One microcomputer data processing circuit, the microcomputer data processing circuit are coupled to the ic for energy metering, use
In the ic for energy metering that selection is in communication with；
Wherein, double manganese copper diverters of connecting include a pair of copper-manganese shunting body, and double copper-manganese shunting bodies are by one first copper-manganese
Shunting body and one second copper-manganese shunting body are in series.
2. intelligent electric meter according to claim 1, which is characterized in that double manganese copper diverters of connecting further include the first purple
Copper shunting body, the second red copper shunting body, wherein
Double copper-manganese shunting bodies are arranged by welding manner in the first red copper shunting body and the second red copper shunting body
Between.
3. intelligent electric meter according to claim 1, which is characterized in that double copper-manganese shunting bodies include three wiring
A, b, c are held, the terminals a and the terminals c are located at the both ends of double copper-manganese shunting bodies.
4. intelligent electric meter according to claim 3, which is characterized in that described three terminals a, b, c are located at double manganese
The ipsilateral or two sides of copper shunting body.
5. intelligent electric meter according to claim 3, which is characterized in that the terminals b is located at double copper-manganese shunting bodies
On central axis, the first copper-manganese shunting body, the terminals b and institute are formed between the terminals a and the terminals b
It states and forms the second copper-manganese shunting body between terminals c.
6. intelligent electric meter according to claim 1, which is characterized in that the first copper-manganese shunting body and second copper-manganese
One through-hole is set on shunting body, for changing current distribution.
7. intelligent electric meter according to claim 1, which is characterized in that the ic for energy metering includes:
One first electric energy computation chip has a first input end and one first communication interface；
One second electric energy computation chip has one second input terminal and one second communication interface；
Wherein, the first copper-manganese shunting body is coupled to the first input end of first electric energy computation chip, for examining
Survey one first electric current；
Second electric energy computation chip is coupled to after the first copper-manganese shunting body and the second copper-manganese shunting body series connection
Second input terminal, for detecting one second electric current, second electric current is less than first electric current.
8. intelligent electric meter according to claim 7, which is characterized in that the ic for energy metering further include:
One Current Mutual Inductance coil is coupled to first electric energy computation chip；
One magnetic latching relay is coupled to the microcomputer data processing circuit, and the magnetic latching relay is by described micro-
Computer digital animation circuit control.
9. intelligent electric meter according to claim 1, which is characterized in that the ic for energy metering may also be configured to only have
One third electric energy computation chip, the third electric energy computation chip have one first analog input end and one second simulation defeated
Enter end and a communication interface；
The magnetic latching relay is coupled to the microcomputer data processing circuit, and the magnetic latching relay is by described
The control of microcomputer data processing circuit；
Wherein, the first copper-manganese shunting body is coupled to second analog input end, for detecting a third electric current；Described
It is coupled to second analog input end after one copper-manganese shunting body and the second copper-manganese shunting body series connection, for detecting one the 4th
Electric current, the 4th electric current are less than the third electric current.
10. according to the described in any item intelligent electric meters of claim 8 or 9, which is characterized in that the microcomputer data processing electricity
Road includes:
One microprocessor, the double isolation telecommunication circuits of an optical coupling, a NB-IOT radio communication circuit, one drive circuit；
Wherein, the microprocessor connects one drive circuit；
The driving circuit is coupled to the magnetic latching relay J50；
The double isolation telecommunication circuit one end of the optical coupling are coupled to the ic for energy metering, and the other end is coupled to the micro process
Device.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201569701U (en) * | 2009-12-29 | 2010-09-01 | 中国电力科学研究院 | Single phase remote charge intelligent ammeter |
| CN202149917U (en) * | 2011-07-06 | 2012-02-22 | 武汉盛帆电子股份有限公司 | Ultra-wide range single-phase electric energy meter |
| CN202404153U (en) * | 2011-12-23 | 2012-08-29 | 内蒙古正安恒泰电力科技有限公司 | Single-phase sampling type prepayment wide-range energy meter with manganin shunt |
| CN202870138U (en) * | 2012-09-14 | 2013-04-10 | 深圳市金正方科技有限公司 | Manganin shunt and electronic Watt-hour meter |
| CN202903841U (en) * | 2012-11-26 | 2013-04-24 | 厦门宏发电力电器有限公司 | Electronic watt-hour meter capable of resisting alternating magnetic field interference |
| CN203084073U (en) * | 2012-06-14 | 2013-07-24 | 郭建国 | Isolation type SPI bus electric energy metering module and multifunctional ammeter |
| CN203456390U (en) * | 2013-07-29 | 2014-02-26 | 长沙中坤电气科技有限公司 | Relay with diverter |
| CN203587634U (en) * | 2013-11-04 | 2014-05-07 | 江苏林洋电子股份有限公司 | Wide-range metering electric energy meter sampling in compound manner |
| CN203858296U (en) * | 2014-04-30 | 2014-10-01 | 厦门宏发电力电器有限公司 | Electronic type electric energy meter, current diverter thereof and sampling resistor sheet |
| RU2015115545A (en) * | 2015-04-23 | 2015-10-10 | Олег Фёдорович Меньших | DEVICE FOR CHECKING INDUCTION ELECTRIC COUNTERS |
| CN205809164U (en) * | 2016-06-22 | 2016-12-14 | 国网黑龙江省电力有限公司绥化供电公司 | A kind of smart metering device |
| CN206193070U (en) * | 2016-11-18 | 2017-05-24 | 深圳市创仁科技有限公司 | Manganin splitter |
-
2018
- 2018-10-11 CN CN201811183455.6A patent/CN109959821A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201569701U (en) * | 2009-12-29 | 2010-09-01 | 中国电力科学研究院 | Single phase remote charge intelligent ammeter |
| CN202149917U (en) * | 2011-07-06 | 2012-02-22 | 武汉盛帆电子股份有限公司 | Ultra-wide range single-phase electric energy meter |
| CN202404153U (en) * | 2011-12-23 | 2012-08-29 | 内蒙古正安恒泰电力科技有限公司 | Single-phase sampling type prepayment wide-range energy meter with manganin shunt |
| CN203084073U (en) * | 2012-06-14 | 2013-07-24 | 郭建国 | Isolation type SPI bus electric energy metering module and multifunctional ammeter |
| CN202870138U (en) * | 2012-09-14 | 2013-04-10 | 深圳市金正方科技有限公司 | Manganin shunt and electronic Watt-hour meter |
| CN202903841U (en) * | 2012-11-26 | 2013-04-24 | 厦门宏发电力电器有限公司 | Electronic watt-hour meter capable of resisting alternating magnetic field interference |
| CN203456390U (en) * | 2013-07-29 | 2014-02-26 | 长沙中坤电气科技有限公司 | Relay with diverter |
| CN203587634U (en) * | 2013-11-04 | 2014-05-07 | 江苏林洋电子股份有限公司 | Wide-range metering electric energy meter sampling in compound manner |
| CN203858296U (en) * | 2014-04-30 | 2014-10-01 | 厦门宏发电力电器有限公司 | Electronic type electric energy meter, current diverter thereof and sampling resistor sheet |
| RU2015115545A (en) * | 2015-04-23 | 2015-10-10 | Олег Фёдорович Меньших | DEVICE FOR CHECKING INDUCTION ELECTRIC COUNTERS |
| CN205809164U (en) * | 2016-06-22 | 2016-12-14 | 国网黑龙江省电力有限公司绥化供电公司 | A kind of smart metering device |
| CN206193070U (en) * | 2016-11-18 | 2017-05-24 | 深圳市创仁科技有限公司 | Manganin splitter |
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