CN206132847U - 8 way electric energy metering device - Google Patents
8 way electric energy metering device Download PDFInfo
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- CN206132847U CN206132847U CN201620760033.0U CN201620760033U CN206132847U CN 206132847 U CN206132847 U CN 206132847U CN 201620760033 U CN201620760033 U CN 201620760033U CN 206132847 U CN206132847 U CN 206132847U
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Abstract
The utility model relates to an electric power measurement and communication technology field are 8 way electric energy metering device, include that signal conditioning module, ADC module, MCU manage unit module, communication module and power module, the electric connection between signal conditioning module and the ADC module, both -way communication connects between ADC module and the MCU management unit module, and MCU manages both -way communication connection between unit module and the communication module, and signal conditioning module includes 8 unit module 1 of group and 8 unit module 2 of group, the ADC module includes 8 current sampling circuit of group, 8 group voltage sampling circuit and AD converters, and MCU management unit module includes hard core control unit, LCD unit, memory cell, this 8 way electric energy metering device is effectual solved minimum with the electric unit many and concentrate with the problems of tradition measurement structures dispersion, the synchronous measurement of 8 way electric energy has improved the device utilization ratio, the cost is reduced, make simultaneously the management dimension nursing worker of ammeter do concentrate more convenient.
Description
Technical field
This utility model is related to power measurement and communication technical field, is a kind of 8 road electric power meter.
Background technology
In recent years, with the growth of China's economy, power consumption is increasing, and the metering to electric energy has been basically completed
By analog to digital transformation, but changed in electric energy metrical structure not yet, still adopt a family in structure
The conventional metered dose mode of one table.Additionally, the type of metering device does not change yet, single-phase meter, three-phase meter two parts are still.
This mode floor space is big, and hardware lap is more and utilization rate is low, high cost, particularly towards each college students place
House, army's barracks, during plant produced line, during the situation of and concentration many in this minimum electric unit, using traditional metering
Mode and metering device, the problems referred to above are especially prominent.
Utility model content
This utility model provides a kind of 8 road electric power meter, overcomes the deficiency of above-mentioned prior art, and which can be effective
Solve the problems, such as the dispersion of conventional metered dose device measurement structure and measure way to cause high cost less.
The technical solution of the utility model is realized by following measures：A kind of 8 road electric power meters, including letter
Number conditioning module, ADC, MCU administrative unit modules, communication module and power module, the ADC and MCU management it is single
Two-way communication link between element module, two-way communication link between MCU administrative units module and communication module, power module and letter
Electrically connect between number conditioning module, electrically connect between power module and ADC, power module and MCU administrative units module it
Between electrically connect, between power module and communication module electrically connect；Signal-regulated kinase include 8 groups of current regulating circuits and 8 groups it is electric
Pressure modulate circuit；ADC includes 8 groups of current sampling circuits, 8 groups of voltage sampling circuits and a/d converter, 8 groups of current regulating electricity
8 outfans on road are electrically connected with 8 inputs of 8 groups of current sampling circuits respectively, 8 outputs of 8 groups of voltage modulate circuits
End is electrically connected with 8 inputs of 8 groups of voltage sampling circuits respectively, and 8 outfans of 8 groups of current sampling circuits are turned with AD respectively
Parallel operation is electrically connected, and 8 outfans of 8 groups of voltage sampling circuits are electrically connected with a/d converter respectively.
The further optimization and/or improvements to above-mentioned utility model technical scheme are presented herein below：
Above-mentioned MCU administrative units module may include hard core control unit, LCD cell and memory element, LCD cell and core
Two-way communication link between administrative unit, two-way communication link between memory element and hard core control unit.
Above-mentioned communication module may include RS-485 communication units, wireless communication unit and the north assisted based on IEC62056 standards
Bucket satellite fix communication unit.
Above-mentioned a/d converter can be modulus conversion chip ADS7953, and hard core control unit is chip MSP430F149.
Above-mentioned LCD cell is serial ports touch screen.
This utility model reasonable and compact in structure, using Signal-regulated kinase, ADC, MCU administrative unit modules, logical
The framework of letter module and power module, can record the electricity consumption event of 8 tunnel energy values and generation simultaneously, can be by above- mentioned information and electricity
Can metric results stored and shown, and by based on the RS-485 communication modes of IEC62056 standards realize metering device with
Two-way communication between data collection station, and then realize and the two-way interaction metering between information main website, go out in wire link
During existing failure, moreover it is possible to which the data of ammeter are sent to main website by data through Beidou communication module in the way of radio communication, solve
Minimum electric unit is more and concentrates problem with conventional metered dose structure disperses, 8 road electric energy synchronous measurements to improve device utilization
Rate, reduces cost, while so that the management service work of ammeter more concentrates convenient.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is body hardware block diagram of the present utility model.
Fig. 3 is current regulating circuit figure of the present utility model.
Fig. 4 is voltage modulate circuit circuit diagram of the present utility model.
Fig. 5 turns 5V circuit figures for power module 12V of the present utility model.
Fig. 6 is power module RS-485 power communications circuit figure of the present utility model.
Fig. 7 turns 3.3V circuit figures for power module 5V of the present utility model.
Fig. 8 turns 2.5VADC reference voltage circuit circuit diagrams for power module 5V of the present utility model.
Fig. 9 turns 2.5V circuit figures for power module 5V of the present utility model.
Figure 10 is that power module 5V of the present utility model turns -5V circuit figures.
Figure 11 is RS-485 communication units circuit diagram of the present utility model.
Specific embodiment
This utility model is not limited by following embodiments, can according to the technical solution of the utility model and practical situation come
Determine specific embodiment.
This utility model is further described with reference to embodiment and accompanying drawing：
As shown in accompanying drawing 1,2,3,4,5,6,7,8,9,10, the 8 road electric power meter, including Signal-regulated kinase, ADC
Module, MCU administrative unit modules, communication module and power module, it is two-way between the ADC and MCU administrative unit modules
Communication connection, two-way communication link between MCU administrative units module and communication module, between power module and Signal-regulated kinase
Electrical connection, electrically connects between power module and ADC, electrically connects, power supply mould between power module and MCU administrative unit modules
Electrically connect between block and communication module；Signal-regulated kinase includes 8 groups of current regulating circuits and 8 groups of voltage modulate circuits；ADC moulds
Block includes 8 groups of current sampling circuits, 8 groups of voltage sampling circuits and a/d converter, 8 outfans of current regulating circuit respectively with
8 inputs electrical connection of current sampling circuit, 8 outfans of voltage modulate circuit respectively with voltage sampling circuit 8
Input is electrically connected, and 8 outfans of 8 outfans and voltage sampling circuit of current sampling circuit are electric with a/d converter respectively
Connection.
As shown in accompanying drawing 5,6,7,8,9,10, wherein power module is broadly divided into 6 parts, and respectively 12V turns 5V, 5V and turns
3.3V, 5V turn 2.5V, 5V and turn 5V, 5V turn of -5V, RS-485 communication power supplies, change through TPS62163 after the input of 12V linear power supplies
For 5V voltages, it is that the LDC units of the a/d converter and MCU administrative unit modules of ADC are powered；5V power supplys are through AMS117
After be converted to 3.3V, the hard core control unit for MCU administrative unit modules provides power supply；5V power supplys are changed after REF5025
For 2.5V voltages, the reference voltage for ADC is powered；It is simultaneously suffered before ADC is carried out in order to reduce signal as far as possible
The interference arrived, it is ensured that undistorted after the conditioned module of signal, when raising to signal, be used alone one piece it is high-precision
Reference power supply chip ADR03；For the reliability for ensureing to communicate, employ B0505-1W insulating power supplies module and carry out isolation and set
Put, be individually powered to communication module；As, in follow-up signal conditioning circuit, amplifier employs dual power supply mould
Formula, therefore the negative 5V voltages of special negative charge pump TPS60400 offers are provided.
As shown in accompanying drawing 3,4, there are 8 groups of voltage modulate circuits in Signal-regulated kinase, using the side of I-V change-over circuits
Formula, including current-limiting resistance, sampling resistor, high-accuracy voltage transformer, operational amplifier, limiter diode, low pass filter etc.
Part.In voltage modulate circuit, voltage signal is converted into current signal by R7 and R11；High-precision currents of the PT for 2mA/2mA
Type voltage transformer；PT secondary side currents signal becomes the voltage letter that can directly input ADC after I-V change-over circuits
Number；Wherein the input current signal of 1mA or so is converted to the sine voltage signal of 1.1V or so for R2, R3, and R2 plays fine setting and makees
With C1 plays High frequency filter effect, and R1 and C2 is primarily to compensate to its phase place for series connection；C8, C9, R10 constitute anti-mixed
Folded low pass filter device, can effectively filter out the HFS in sampled signal, reduce spectral aliasing；The effect of D1 and D2 be in order to
Big voltage is produced after preventing transformer secondary side some high-frequency signal coils, when voltage more than D1 with D2 conducting voltages when, D1
Or D2 conductings, play a part of protection.There are 8 groups of current regulating circuits in Signal-regulated kinase, using the side of I-V change-over circuits
Formula, including current-limiting resistance, sampling resistor, high precision current transformer, operational amplifier, limiter diode, low pass filter etc.
Part.In current regulating circuit, CT is high precision current transformer, and CT secondary side currents signal becomes after I-V change-over circuits
Into the current signal that can directly input ADC, input current signal is converted to wherein R8, R9 the sinusoidal current of 1.1V or so
Signal, R8 play fine setting effect, and C3 plays High frequency filter effect, and R4 and C5 is primarily to compensate to its phase place for series connection；
C11, C12, R13 constitute anti-aliasing low pass filter device, can effectively filter out the HFS in sampled signal, reduce frequency spectrum and mix
It is folded；The effect of D3 and D4 be in order to produce big voltage after preventing transformer secondary side some high-frequency signal coils, when voltage it is big
When D3 is with D4 conducting voltages, D3 or D4 conductings play a part of protection, the voltage modulate circuit on remaining each road, current regulating
Circuit is consistent with the circuit parameter.
According to actual needs above-mentioned 8 road electric power meter can be made further optimization and/or improvements：
As shown in accompanying drawing 1,2, MCU administrative unit modules include hard core control unit, LCD cell and memory element, and LCD is mono-
Two-way communication link between unit and hard core control unit, two-way communication link between memory element and hard core control unit.
As shown in accompanying drawing 1,2,11, communication module is included based on the RS-485 communication units of IEC62056 standards association, wirelessly
Communication unit and big-dipper satellite positioning and communicating unit.
As shown in Figure 11, in the circuit of the RS-485 communication units assisted based on IEC62056 standards, RS-485 communication electricity
Road adopts SPRS485EN chips, and PS2501L chips are used for isolated from power, for protecting former-section circuit；RT1 and RT2 is temperature-sensitive electricity
Resistance device, is played a protective role to rear end with TVS pipe instrument.Wherein the power supply of SPRS485EN chips is by special RS-485 power supplys
There is provided, the RS-485 power supplys carry out isolation using B0505-1W insulating power supplies module and arrange individually power supply.Marked based on IEC62056
32 nodes of the general maximum support of RS-485 buses in the RS-485 communication units of quasi- association, if using 485 special chips, can
To reach 128 or 256 nodes, maximum can support 400 nodes, that is, having ensured can be most using a terminal
Many satisfactions are transmitted to 400 road electric energy measurement datas, so as to realize between 8 road electric power meters and data collection station
Two-way communication, and the two-way interaction metering communication between electric power meter and information main website is realized with this；In basic communication mould
When block breaks down, data can be sent to main website by wireless link through big-dipper satellite positioning and communicating unit by the data of ammeter,
Big-dipper satellite positioning and communicating unit when fiber optic communication is broken down, can realize the overlength of data as subsidiary communications mode
The transmission of distance.
As shown in accompanying drawing 1,2, in the 8 road electric power meter, a/d converter be modulus conversion chip ADS7953, core
Administrative unit is chip MSP430F149.Modulus conversion chip ADS7953 has a sample rate of highest 1MHZ, 12 bit resolutions,
16 tunnel transmission channels, are provided simultaneously with low power consumption characteristic and serial transmission function, and two kinds of chips are simultaneous with multichannel
UART, the chip of multichannel SPI interface, therefore the two-way communication link between ADC and MCU administrative unit modules, MCU management is single
Two-way communication link between element module and communication module can be by controlling two-way of the CS and SCLK pins using SPI modes
Letter connection carries out data exchange, the two-way communication link in MCU administrative unit modules between core managing chip and display unit
Data exchange is carried out using the two-way communication link of UART modes, the two-way communication between hard core control chip and memory element connects
Connecing the two-way communication link by the way of GPIO mouth molds intend IIC carries out data exchange.
As shown in accompanying drawing 1,2, in the 8 road electric power meter, LCD cell is serial ports touch screen.
As shown in Figure 2, LCD cell be serial ports touch screen, by serial ports touch screen be used for data display and button it is defeated
Enter, replace conventional keys input, can be by writing MCU management programs, real-time response user key-press operation, by touch screen wiring
Circuit is simple, the advantages of strong interference immunity, ensures normal use of the device under industrial production environment；Memory element is 2
External memory storage（EEPROM）, a piece of configuration parameter for storage system, calibration parameter and electricity consumption data, another is used to deposit
Load curve parameter is put, during reading and writing data, has been used two GPIO mouth molds of hard core control chip to intend iic bus and has been entered
Row read operation, while two panels memorizer common clock line and data wire.
Above technical characteristic constitutes most preferred embodiment of the present utility model, and which has stronger adaptability and optimal enforcement
Effect, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.
Claims (12)
1. a kind of 8 road electric power meter, it is characterised in that：Including Signal-regulated kinase, ADC, MCU administrative unit moulds
Block, communication module and power module, two-way communication link between the ADC and MCU administrative unit modules, MCU management are single
Two-way communication link between element module and communication module, between power module and Signal-regulated kinase electrically connect, power module and
Electrically connect between ADC, electrically connect between power module and MCU administrative unit modules, between power module and communication module
Electrical connection；Signal-regulated kinase includes 8 groups of current regulating circuits and 8 groups of voltage modulate circuits；ADC includes that 8 groups of electric currents are adopted
Sample circuit, 8 groups of voltage sampling circuits and a/d converter, 8 outfans of 8 groups of current regulating circuits respectively with 8 groups of current samples
8 input electrical connections of circuit, 8 outfans of 8 groups of voltage modulate circuits are defeated with 8 of 8 groups of voltage sampling circuits respectively
Enter end electrical connection, 8 outfans of 8 groups of current sampling circuits are electrically connected with a/d converter respectively, the 8 of 8 groups of voltage sampling circuits
Individual outfan is electrically connected with a/d converter respectively.
2. 8 road according to claim 1 electric power meter, it is characterised in that：The MCU administrative units module includes core
Heart administrative unit, LCD cell and memory element, two-way communication link between LCD cell and hard core control unit, memory element with
Two-way communication link between hard core control unit.
3. 8 road according to claim 1 electric power meter, it is characterised in that：The communication module includes being based on
RS-485 communication units, wireless communication unit and big-dipper satellite positioning and communicating unit that IEC62056 standards are assisted.
4. 8 road according to claim 2 electric power meter, it is characterised in that：The communication module includes being based on
RS-485 communication units, wireless communication unit and big-dipper satellite positioning and communicating unit that IEC62056 standards are assisted.
5. 8 road according to claim 1 electric power meter, it is characterised in that：The a/d converter is analog digital conversion core
Piece ADS7953, hard core control unit are chip MSP430F149.
6. 8 road according to claim 2 electric power meter, it is characterised in that：The a/d converter is analog digital conversion core
Piece ADS7953, hard core control unit are chip MSP430F149.
7. 8 road according to claim 3 electric power meter, it is characterised in that：The a/d converter is analog digital conversion core
Piece ADS7953, hard core control unit are chip MSP430F149.
8. 8 road according to claim 4 electric power meter, it is characterised in that：The a/d converter is analog digital conversion core
Piece ADS7953, hard core control unit are chip MSP430F149.
9. 8 road according to claim 2 electric power meter, it is characterised in that：The LCD cell is serial ports touch screen.
10. 8 road according to claim 4 electric power meter, it is characterised in that：The LCD cell is serial ports touch screen.
11. 8 road according to claim 6 electric power meters, it is characterised in that：The LCD cell is serial ports touch screen.
12. 8 road according to claim 8 electric power meters, it is characterised in that：The LCD cell is serial ports touch screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620760033.0U CN206132847U (en) | 2016-07-19 | 2016-07-19 | 8 way electric energy metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620760033.0U CN206132847U (en) | 2016-07-19 | 2016-07-19 | 8 way electric energy metering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206132847U true CN206132847U (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620760033.0U Expired - Fee Related CN206132847U (en) | 2016-07-19 | 2016-07-19 | 8 way electric energy metering device |
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| Country | Link |
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| CN (1) | CN206132847U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111090003A (en) * | 2019-11-14 | 2020-05-01 | 国网江西省电力有限公司电力科学研究院 | Synchronous direct current electric energy metering system based on Beidou/GPS clock |
| CN112684405A (en) * | 2020-12-21 | 2021-04-20 | 国家电网有限公司 | Management core simulation system and method with switching value control function |
-
2016
- 2016-07-19 CN CN201620760033.0U patent/CN206132847U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111090003A (en) * | 2019-11-14 | 2020-05-01 | 国网江西省电力有限公司电力科学研究院 | Synchronous direct current electric energy metering system based on Beidou/GPS clock |
| CN111090003B (en) * | 2019-11-14 | 2022-04-12 | 国网江西省电力有限公司电力科学研究院 | Synchronous direct current electric energy metering system based on Beidou/GPS clock |
| CN112684405A (en) * | 2020-12-21 | 2021-04-20 | 国家电网有限公司 | Management core simulation system and method with switching value control function |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170426 Termination date: 20190719 |