CN206400004U - The single-phase 3 line intelligent electric meter of high current - Google Patents
The single-phase 3 line intelligent electric meter of high current Download PDFInfo
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- CN206400004U CN206400004U CN201720043341.6U CN201720043341U CN206400004U CN 206400004 U CN206400004 U CN 206400004U CN 201720043341 U CN201720043341 U CN 201720043341U CN 206400004 U CN206400004 U CN 206400004U
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Abstract
The utility model discloses a kind of single-phase 3 line intelligent electric meter of high current, including main control chip, the computation chip electrically connected with main control chip, voltage voltage signal sampling circuit, the first current transformer current signal sample circuit and the second current transformer current signal sample circuit electrically connected with computation chip, the display electrically connected with main control chip, memory, pulse outgoing management circuit and data-interface；Voltage voltage signal sampling circuit and the first current transformer current signal sample circuit are connected with the zero line of mains supply, and voltage voltage signal sampling circuit and the second current transformer current signal sample circuit are connected with the live wire of mains supply.The utility model has the construction cycle short, and production cost is low, and the degree of accuracy is high, and error consistency is good, strong antijamming capability, the less feature of error knots modification.
Description
Technical field
The utility model is related to electric energy meter technical field, and short more particularly, to a kind of construction cycle, production cost is low, accurately
The high single-phase 3 line intelligent electric meter of high current of degree.
Background technology
The integrated chip of electric energy meter only one of which of the prior art, during upgrading products, software and hardware needs to set again
Meter and exploitation, the construction cycle are long, and reliability and stability need to spend long time to verify.
The content of the invention
Goal of the invention of the present utility model is to overcome electric energy meter new product development cycle length of the prior art not
Foot is there is provided a kind of construction cycle is short, and production cost is low, the single-phase 3 line intelligent electric meter of the high high current of the degree of accuracy.
To achieve these goals, the utility model uses following technical scheme：
A kind of single-phase 3 line intelligent electric meter of high current, including main control chip, the computation chip electrically connected with main control chip,
Voltage voltage signal sampling circuit, the first current transformer current signal sample circuit and electrically connected with computation chip
Two current transformer current signal sample circuits, the display electrically connected with main control chip, memory, pulse outgoing management electricity
Road and data-interface；Voltage voltage signal sampling circuit and the first current transformer current signal sample circuit are and civil power
The zero line connection of power supply, voltage voltage signal sampling circuit and the second current transformer current signal sample circuit Jun Yu cities
The live wire connection of power supply.
Master control of the present utility model is single-phase and three-phase is unified, the meter function of needing to realize with ammeter, suitable for volume production,
Only need to delete after certain functional module, you can realize the output requirement of new product sample table and small quantities of table.
The degree of accuracy can reach 0.5S grades, and the degree of accuracy is higher；Error is the 50% of 1 grade of table, is had for sale of electricity enterprise more preferable
Fairness and input and output.Error consistency is more preferable, strong antijamming capability；Under environment temperature, voltage, frequency, magnetic field, by mistake
Poor knots modification is smaller.
Preferably, the first current transformer current signal sample circuit includes the first circuit for sampled current signals
Transformer Q1, resistance R43, resistance R45, resistance R46 and resistance R48, electric capacity C47 and electric capacity C49；First current transformer Q1's
1 signal output terminal is electrically connected with resistance R43 one end and resistance R45 one end respectively, the first current transformer Q1 another
Signal output terminal is electrically connected with resistance R46 one end and resistance R48 one end respectively, the resistance R45 other ends and the resistance R46 other ends
Be grounded, the resistance R43 other ends are electrically connected with electric capacity C47 one end and computation chip respectively, the resistance R48 other ends respectively with electric capacity
C49 one end and computation chip electrical connection, electric capacity C47 and the electric capacity C49 other ends are grounded.
Preferably, the second current transformer current signal sample circuit includes the second circuit for sampled current signals
Transformer Q2, resistance R37, resistance R39, resistance R40 and resistance R41, electric capacity C41 and electric capacity C44；Second circuit transformer Q2's
1 signal output terminal is electrically connected with resistance R39 one end and resistance R37 one end respectively, second circuit transformer Q2 another
Signal output terminal is electrically connected with resistance R40 one end and resistance R41 one end respectively, the resistance R39 other ends and the resistance R40 other ends
Be grounded, the resistance R37 other ends are electrically connected with electric capacity C41 one end and computation chip respectively, the resistance R41 other ends respectively with electric capacity
C44 one end and computation chip electrical connection, electric capacity C41 and the electric capacity C44 other ends are grounded.
Preferably, pulse outgoing management circuit includes resistance R11, electric capacity C24 and optocoupler E1；Resistance R11 one end and master
Chip electrical connection is controlled, the resistance R11 other ends are electrically connected with optocoupler F1, and electric capacity C24 two ends are electrically connected with optocoupler F1.
Preferably, the model ATM90E26 of computation chip.
Preferably, the model STM32L158VT6 of main control chip.
Therefore, the utility model has the advantages that：Construction cycle is short, and production cost is low, and the degree of accuracy is high, error one
Good, the strong antijamming capability of cause property, error knots modification is smaller.
Brief description of the drawings
Fig. 1 is a kind of theory diagram of the present utility model；
Fig. 2 is a kind of circuit diagram of the first current transformer current signal sample circuit of the present utility model；
Fig. 3 is a kind of circuit diagram of the second current transformer current signal sample circuit of the present utility model；
Fig. 4 is a kind of circuit diagram of pulse outgoing management circuit of the present utility model.
In figure：Main control chip 1, computation chip 2, voltage voltage signal sampling circuit 3, the first current transformer
Current signal sample circuit 4, the second current transformer current signal sample circuit 5, display 6, memory 7, pulse are defeated
Go out to manage circuit 8, data-interface 9.
Embodiment
The utility model is further described with reference to the accompanying drawings and detailed description.
Embodiment as shown in Figure 1 is a kind of single-phase 3 line intelligent electric meter of high current, including main control chip 1, with main control chip
The computation chip 2 of electrical connection, voltage voltage signal sampling circuit 3, the first Current Mutual Inductance electrically connected with computation chip
Device current signal sample circuit 4 and the second current transformer current signal sample circuit 5, the display electrically connected with main control chip
Device 6, memory 7, pulse outgoing management circuit 8 and data-interface 9；Voltage voltage signal sampling circuit and the first electric current are mutual
Sensor current signal sample circuit is connected with the zero line of mains supply, voltage voltage signal sampling circuit and the second electric current
Transformer current signal sample circuit is connected with the live wire of mains supply.
As shown in Fig. 2 the first current transformer current signal sample circuit includes the first electricity for sampled current signals
Road transformer Q1, resistance R43, resistance R45, resistance R46 and resistance R48, electric capacity C47 and electric capacity C49；First current transformer Q1
1 signal output terminal electrically connected respectively with resistance R43 one end and resistance R45 one end, the first current transformer Q1's is another
Individual signal output terminal is electrically connected with resistance R46 one end and resistance R48 one end respectively, and the resistance R45 other ends and resistance R46 are another
End be grounded, the resistance R43 other ends are electrically connected with electric capacity C47 one end and computation chip respectively, the resistance R48 other ends respectively with electricity
Hold C49 one end and computation chip electrical connection, electric capacity C47 and the electric capacity C49 other ends are grounded.
As shown in figure 3, the second current transformer current signal sample circuit includes the second electricity for sampled current signals
Road transformer Q2, resistance R37, resistance R39, resistance R40 and resistance R41, electric capacity C41 and electric capacity C44；Second circuit transformer Q2
1 signal output terminal electrically connected respectively with resistance R39 one end and resistance R37 one end, second circuit transformer Q2's is another
Individual signal output terminal is electrically connected with resistance R40 one end and resistance R41 one end respectively, and the resistance R39 other ends and resistance R40 are another
End be grounded, the resistance R37 other ends are electrically connected with electric capacity C41 one end and computation chip respectively, the resistance R41 other ends respectively with electricity
Hold C44 one end and computation chip electrical connection, electric capacity C41 and the electric capacity C44 other ends are grounded.
As shown in figure 4, pulse outgoing management circuit includes resistance R11, electric capacity C24 and optocoupler F1；Resistance R11 one end and master
Chip electrical connection is controlled, the resistance R11 other ends are electrically connected with optocoupler F1, and electric capacity C24 two ends are electrically connected with optocoupler F1.Computation chip
Model ATM90E26.The model STM32L158VT6 of main control chip.
The course of work of the present utility model is as follows：
The neutral voltage of mains supply is gathered by voltage voltage signal sampling circuit, obtains 1 differential voltage letter
Number；The electric current of live wire and zero line passes through the first current transformer current signal sample circuit and the second current transformer current signal
Sample circuit is gathered, and obtains 2 differential voltage signals；
Three differential signals are input to computation chip ATM90E26 AD mouths, realize the cumulative and function of measuring of electricity；
The electricity of metering was saved in holder once every 1 minute；
Main control chip realizes calibrating for error for ammeter by pulse outgoing management circuit output pulse；
Electricity after main control chip will add up is stored into memory, and controls display with the refreshing frequency of 0.5 second
Show current electric quantity；
If other information needs display, main control chip control display is shown；
Main control chip is connected by data-interface with host computer, it is necessary to when obtaining data in electric energy meter, by user computer with
Host computer is connected, the electricity of acquisition ammeter, power, voltage, the data such as electric current.
It should be understood that the present embodiment is merely to illustrate the utility model rather than limits scope of the present utility model.In addition
It should be understood that after the content of the utility model instruction has been read, those skilled in the art can make various to the utility model
Change or change, these equivalent form of values equally fall within the application appended claims limited range.
Claims (6)
1. a kind of single-phase 3 line intelligent electric meter of high current, it is characterized in that, including main control chip (1), the meter electrically connected with main control chip
Measure chip (2), the voltage voltage signal sampling circuit (3) electrically connected with computation chip, the first current transformer electric current
Signal sample circuit (4) and the second current transformer current signal sample circuit (5), the display electrically connected with main control chip
(6), memory (7), pulse outgoing management circuit (8) and data-interface (9)；Voltage voltage signal sampling circuit and first
Current transformer current signal sample circuit is connected with the zero line of mains supply, voltage voltage signal sampling circuit and
Two current transformer current signal sample circuits are connected with the live wire of mains supply.
2. the single-phase 3 line intelligent electric meter of high current according to claim 1, it is characterized in that, the first current transformer electric current letter
Number sample circuit includes the first current transformer Q1 for sampled current signals, resistance R43, resistance R45, resistance R46 and electricity
Hinder R48, electric capacity C47 and electric capacity C49；First current transformer Q1 1 signal output terminal respectively with resistance R43 one end and electricity
Hinder the electrical connection of R45 one end, the first current transformer Q1 another signal output terminal respectively with resistance R46 one end and resistance
R48 one end is electrically connected, and the resistance R45 other ends and the resistance R46 other ends be grounded, the resistance R43 other ends respectively with electric capacity C47 mono-
End and computation chip electrical connection, the resistance R48 other ends are electrically connected with electric capacity C49 one end and computation chip respectively, electric capacity C47 and electricity
Hold the C49 other ends to be grounded.
3. the single-phase 3 line intelligent electric meter of high current according to claim 1, it is characterized in that, the second current transformer electric current letter
Number sample circuit includes second circuit transformer Q2, resistance R37 for sampled current signals, resistance R39, resistance R40 and electricity
Hinder R41, electric capacity C41 and electric capacity C44；Second circuit transformer Q2 1 signal output terminal respectively with resistance R39 one end and electricity
Hinder the electrical connection of R37 one end, second circuit transformer Q2 another signal output terminal respectively with resistance R40 one end and resistance
R41 one end is electrically connected, and the resistance R39 other ends and the resistance R40 other ends be grounded, the resistance R37 other ends respectively with electric capacity C41 mono-
End and computation chip electrical connection, the resistance R41 other ends are electrically connected with electric capacity C44 one end and computation chip respectively, electric capacity C41 and electricity
Hold the C44 other ends to be grounded.
4. the single-phase 3 line intelligent electric meter of high current according to claim 1, it is characterized in that, pulse outgoing management circuit includes
Resistance R11, electric capacity C24 and optocoupler F1；Resistance R11 one end is electrically connected with main control chip, and the resistance R11 other ends are electrically connected with optocoupler F1
Connect, electric capacity C24 two ends are electrically connected with optocoupler E1.
5. the single-phase 3 line intelligent electric meter of high current according to claim 1, it is characterized in that, the model of computation chip
ATM90E26。
6. the single-phase 3 line intelligent electric meter of high current according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that, main control chip
Model STM32L158VT6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720043341.6U CN206400004U (en) | 2017-01-15 | 2017-01-15 | The single-phase 3 line intelligent electric meter of high current |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720043341.6U CN206400004U (en) | 2017-01-15 | 2017-01-15 | The single-phase 3 line intelligent electric meter of high current |
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| Publication Number | Publication Date |
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| CN206400004U true CN206400004U (en) | 2017-08-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020705A (en) * | 2017-12-27 | 2018-05-11 | 浙江恒业电子有限公司 | Current sampling circuit for three-phase electric energy meter |
| CN110244257A (en) * | 2019-07-26 | 2019-09-17 | 华立科技股份有限公司 | The earth detector and method of electric energy meter |
| CN111413541A (en) * | 2020-04-22 | 2020-07-14 | 上海国泉科技有限公司 | Metering circuit of ammeter and ammeter |
| CN114340092A (en) * | 2021-12-29 | 2022-04-12 | 上海晶丰明源半导体股份有限公司 | Full-voltage sampling circuit, driving chip, LED driving circuit and sampling method |
-
2017
- 2017-01-15 CN CN201720043341.6U patent/CN206400004U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020705A (en) * | 2017-12-27 | 2018-05-11 | 浙江恒业电子有限公司 | Current sampling circuit for three-phase electric energy meter |
| CN110244257A (en) * | 2019-07-26 | 2019-09-17 | 华立科技股份有限公司 | The earth detector and method of electric energy meter |
| CN111413541A (en) * | 2020-04-22 | 2020-07-14 | 上海国泉科技有限公司 | Metering circuit of ammeter and ammeter |
| CN114340092A (en) * | 2021-12-29 | 2022-04-12 | 上海晶丰明源半导体股份有限公司 | Full-voltage sampling circuit, driving chip, LED driving circuit and sampling method |
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