CN206990673U - A kind of electronic single-phase anti-electricity-theft electric energy meter - Google Patents
A kind of electronic single-phase anti-electricity-theft electric energy meter Download PDFInfo
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- CN206990673U CN206990673U CN201720810815.5U CN201720810815U CN206990673U CN 206990673 U CN206990673 U CN 206990673U CN 201720810815 U CN201720810815 U CN 201720810815U CN 206990673 U CN206990673 U CN 206990673U
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- electric energy
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- energy meter
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Abstract
The utility model discloses a kind of electronic single-phase anti-electricity-theft electric energy meter, including measuring unit, processing unit, PMU and auxiliary unit, measuring unit includes resitstance voltage divider, current transformer and manganese copper diverter, measuring unit collection signal is sent into processing unit, processing unit includes AD7751 detection chips and controller chip, AD7751 detection chips are sampled to signal and are converted to data signal, pass through phasing again, data after correction send controller chip to, after AD7751 detection chip data being read by controller, the data of completion are handled by auxiliary unit, realize the accumulative of electric energy, storage and display.Utility model measures the electrical parameters such as the voltage in power network, electric current, power, frequency using AD7751 computation chips, and accuracy of measuring height, small power consumption, stability is strong, operation characteristic is excellent, reliability is high, small volume, in light weight, service life length；Examination of the power supply department to power network is facilitated, anti-stealing electricity function is realized using phase line and the size of zero line power.
Description
Technical field
A kind of anti-electricity-theft device is the utility model is related to, specifically a kind of electronic single-phase anti-electricity-theft electric energy meter, category
In technical field of electric equipment.
Background technology
As each electric appliances for entering family are more and more, civilian electricity increases severely, and is driven by economic interests, stealing electricity phenomenon
Also getting worse.No matter in developed country or in developing country, stealing is all a very stubborn problem, is all given every year
Power supply enterprise brings about great losses.Because stealing electricity method is ever-changing, electric meter capable of avoiding fraudulent use of electricity design is always that ammeter engineer faces
Severe challenge, developing into for digital electric meter solve the problems, such as that stealing provides new way.
Utility model content
Technical problem to be solved in the utility model is, the shortcomings that for above prior art, proposes a kind of single-phase electricity
Minor anti-electricity-theft electric energy meter, the collection and calculating of phase line, neutral line current and line voltage can be completed, solve data acquisition with
The real time problems of processing, single-chip microcomputer is monitored in real time according to phase line and the watt level of zero line to user power utilization situation, right
Various stealing modes are accurately screened.
In order to solve the above-mentioned technical problem, the utility model provides a kind of electronic single-phase anti-electricity-theft electric energy meter, including surveys
Unit, processing unit, PMU and auxiliary unit are measured, the measuring unit includes resitstance voltage divider, current transformer
And manganese copper diverter, the measuring unit collection signal are sent into processing unit, the processing unit includes AD7751 detection cores
Piece and controller chip, the AD7751 detection chips are sampled to signal and are converted to data signal, then by phase school
Just, the data after correction send controller to, after reading AD7751 detection chip data by the controller, the data of completion by
Auxiliary unit processing, realize the accumulative of electric energy, storage and display；The PMU two-way transformation power supply, wherein all the way
Power supply detection chip, another way power-supply controller chip.
It is of the present utility model further to limit technical scheme, foregoing electronic single-phase anti-electricity-theft electric energy meter, the auxiliary
Unit includes communicating circuit, display data memory cell and indicator lamp.
Foregoing electronic single-phase anti-electricity-theft electric energy meter, used between the AD7751 detection chips and controller chip
SPI interface communicates；The controller chip is 8 single chip computer89C51s, and the chip I/O mouth lines are more, it is convenient design display output and
Control circuit, peripheral interface circuit can be simplified, reduce the volume and weight of electric energy meter, reduce cost.
Further, foregoing electronic single-phase anti-electricity-theft electric energy meter, the PMU and detection chip circuit
Power supply use analog circuit, and another way is powered with controller chip and uses digital circuit, so as to ensure computation chip stability, two
Power supply is independent of each other, and effectively prevents two kinds of mutual crosstalks of unlike signal.
The beneficial effects of the utility model：The utility model using AD7751 computation chips come measure the voltage in power network,
The electrical parameters such as electric current, power, frequency, accuracy of measuring height, small power consumption, stability is strong, operation characteristic is excellent, reliability is high, body
Product is small, in light weight, service life length；Facilitate examination of the power supply department to power network, using the size of phase line and zero line power come
Anti-stealing electricity function is realized, avoids other from needing to increase additional devices and the trouble of circuit.Digital energy consumption measure is used simultaneously, greatly
Reduce electric energy metering error and the loss of itself greatly.
Brief description of the drawings
Fig. 1 is structured flowchart of the present utility model.
Fig. 2 is the utility model AD7751 detection chip circuit theory diagrams.
Fig. 3 is the utility model voltage sampling circuit figure.
Fig. 4 is the utility model current sampling circuit figure.
Embodiment
The utility model is described in further detail below：
Embodiment 1
A kind of electronic single-phase anti-electricity-theft electric energy meter that the present embodiment provides, structure as shown in Figures 1 to 4, including measure
Unit, processing unit, PMU and auxiliary unit, auxiliary unit include communicating circuit, display data memory cell
And indicator lamp；Measuring unit includes resitstance voltage divider, current transformer and manganese copper diverter, and measuring unit collection signal is sent
Enter processing unit, processing unit includes AD7751 detection chips and controller chip 89C51, AD7751 detection chip is entered to signal
Row samples and is converted to data signal, then by phasing, the data after correction send controller chip 89C51 to,
Communicated between AD7751 detection chips and controller chip 89C51 using SPI interface, AD7751 detection chips are read by controller
After data, the data of completion are handled by auxiliary unit, realize the accumulative of electric energy, storage and display；PMU two-way becomes
Pressure power supply, wherein detection chip of powering all the way, another way power-supply controller chip, PMU supply with detection chip circuit
Electricity uses analog circuit, and another way uses digital circuit with controller chip power supply.
The present embodiment measuring unit:Voltage and current is taken by resitstance voltage divider summation current transformer and manganese copper diverter respectively
Sample, sampled signal are sent into AD7751 detection chips, signal are sampled by AD7751 detection chips and is converted to data signal,
Pass through phasing again, calculate the data such as electric energy, electric current, voltage.These data send controller chip to by SPI interface
89C51.After reading computation chip data, the accumulative of electric energy, storage and display are completed, reads the umber of pulse of electricity chip, in real time
Ammeter working condition is detected, record stealing event occurred, provides stealing indication signal；Realized by RS485 communication modules
To ammeter data copy reading and setting, power module provides working power for whole system, and after power supply power-fail, single-chip microcomputer closes liquid crystal
It has been shown that, into complete power-down mode, power consumption is preferably minimized, and is only maintained to carry out related data inside single-chip microcomputer by backup battery
Processing.
The voltage sampling circuit of the present embodiment, using electric resistance partial pressure mode, as shown in Figure 3, it is contemplated that Chip-R it is resistance to
Limit is pressed with, divider is made from 4 300k Ω resistance.AD7751 detection chips are inputted using fully differential mode, electric current, voltage
Passage peak signal input range is peak value 700mV, and input signal can not be more than this maximum, peak clipping otherwise occurs.Mutually electricity
Flow sensor uses transformer, no-load voltage ratio 2000: 1.Neutral line current passage uses manganese copper diverter, and current divider resistance takes 290 μ
Ω, the channel gain are arranged to 16.Resistance can not obtain it is excessive or too small, if selecting too small, in low current sample letter
It is number too faint, cause error to increase, it is easily overproof.If selecting too much, current divider heating is excessive during high current, causes error
It is unstable.
Above example is only to illustrate technological thought of the present utility model, it is impossible to limits protection model of the present utility model with this
Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical scheme, each fall within this reality
Within the scope of novel protected.
Claims (5)
1. a kind of electronic single-phase anti-electricity-theft electric energy meter, including measuring unit, processing unit, PMU and auxiliary are single
Member, it is characterised in that：The measuring unit includes resitstance voltage divider, current transformer and manganese copper diverter, the measuring unit
Gather signal and be sent into processing unit, the processing unit includes AD7751 detection chips and controller chip, the AD7751
Detection chip is sampled to signal and is converted to data signal, then by phasing, the data after correction send control to
Device chip processed, after reading AD7751 detection chip data by the controller, the data of completion are handled by auxiliary unit, are realized
The accumulative of electric energy, storage and display；The PMU two-way transformation power supply, wherein detection chip of powering all the way, another
Road power-supply controller chip.
2. electronic single-phase anti-electricity-theft electric energy meter according to claim 1, it is characterised in that：The auxiliary unit includes logical
Interrogate circuit, display data memory cell and indicator lamp.
3. electronic single-phase anti-electricity-theft electric energy meter according to claim 1, it is characterised in that：The AD7751 detection chips
Communicated between controller chip using SPI interface.
4. electronic single-phase anti-electricity-theft electric energy meter according to claim 2, it is characterised in that：The controller chip is 8
Position single chip computer89C51.
5. electronic single-phase anti-electricity-theft electric energy meter according to claim 3, it is characterised in that：The PMU with
The power supply of detection chip circuit uses analog circuit, and another way uses digital circuit with controller chip power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720810815.5U CN206990673U (en) | 2017-07-06 | 2017-07-06 | A kind of electronic single-phase anti-electricity-theft electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720810815.5U CN206990673U (en) | 2017-07-06 | 2017-07-06 | A kind of electronic single-phase anti-electricity-theft electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206990673U true CN206990673U (en) | 2018-02-09 |
Family
ID=61399790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720810815.5U Expired - Fee Related CN206990673U (en) | 2017-07-06 | 2017-07-06 | A kind of electronic single-phase anti-electricity-theft electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206990673U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666390A (en) * | 2021-01-20 | 2021-04-16 | 淮北工科检测检验有限公司 | Electric energy detection metering system |
-
2017
- 2017-07-06 CN CN201720810815.5U patent/CN206990673U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666390A (en) * | 2021-01-20 | 2021-04-16 | 淮北工科检测检验有限公司 | Electric energy detection metering system |
| CN112666390B (en) * | 2021-01-20 | 2023-07-11 | 淮北工科检测检验有限公司 | Electric energy detection metering system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180209 Termination date: 20200706 |
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| CF01 | Termination of patent right due to non-payment of annual fee |