CN203455376U - Multifunctional electric energy meter with redundancy electric energy data storing technology - Google Patents

Abstract

Provided is a multifunctional electric energy meter with the redundancy electric energy data storing technology. The multifunctional electric energy meter comprises a CPU, a three-phase voltage and current analog input circuit, a ferroelectric memory and an EPPROM memory. The CPU is connected with the ferroelectric memory, the EPPROM memory and the three-phase voltage and current analog input circuit; the three-phase voltage and current analog input circuit is used for sampling voltage and current in circuits and sending the voltage and the current to the CPU; the CPU is used for calculating accumulated power and electric energy and sorting electric energy data in the ferroelectric memory; and the EPPROM memory is used for back-upping the electric energy data. The multifunctional electric energy meter is capable of performing redundancy storing for the electric energy data, storing and timely recording the electric energy data on demands, and improving reliability and restorability of the storage of the electric energy data.

Description

The multifunctional electric energy meter with redundancy electric energy data storage technology

Technical field

The utility model belongs to electronic instrument technical field, relates to a kind of multifunctional electric energy meter with redundancy electric energy data storage technology.

Background technology

Along with proposition and the construction of national grid for strong intelligent grid, the strong property of electric instrument is had higher requirement.Multifunctional electric energy meter, as the terminal of strong intelligent grid, has vital role to the construction of intelligent sturdy power grid.Electric energy metrical is as grid company and user's charge foundation, as the foundation of electricity consumption enterprises examination, and its stability and restorability are significant.Multifunctional electric energy meter adopts a slice ferroelectric memory carry out energy data storage and read more at present.Once write ferroelectric sequential mistake because interference causes in storage of electrical energy data at multifunctional electric energy meter, cause writing the error in data of electric energy, so when again reading ferroelectric interior data, can be incorrect and can not obtain energy data due to check code, cause the energy data of this electric energy meter metering to be lost, thereby cause trouble to user.

Utility model content

For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of multifunctional electric energy meter with redundancy electric energy data storage technology, comprise: CPU, three-phase voltage current analog input circuit, ferroelectric memory, EPPROM storer, CPU respectively with ferroelectric memory, EPPROM storer, three-phase voltage current simulated measurement input circuit connects, three-phase voltage current simulated measurement input circuit is to the voltage in circuit, electric current is sampled, and be transferred to CPU, CPU measuring voltage, current value, calculate integral power and electric energy, when electric energy increment surpasses while presetting threshold value, CPU is to the storage of carrying out energy data in ferroelectric memory, when distance C PU last time reaches predetermined value to time of EPPROM memory stores data, new energy data and temporal information are stored in EPPROM storer.

In addition, described multifunctional electric energy meter also comprises communication module, relay output module, switching input module, analog quantity transformation output module, key-press module, clock chip, LCD display module and power module, and above-mentioned each module is connected with CPU.

In addition, CPU can select SOC chip.

Also have, described ferroelectric memory adopts FM25CL64 chip, its first pin

, the 6th pin SCK, the 5th pin DI and the second pin DO be connected with the IO interface of CPU respectively, carries out reading and storing of energy data, adopts SPI interface sequence to store and read energy data.

Have again, described EPPROM storer adopts 24C02 chip, and its 6th pin WP and the 5th pin SDA are connected with the IO interface of CPU respectively, as energy data supplementary storage, carry out the backup of energy data, the backup that adopts IIC Interface realization to carry out energy data is read and back-up storage.

The multifunctional electric energy meter that the utlity model has redundancy electric energy data storage technology can carry out the redundant storage of energy data, stored record energy data per hour, can inquire about the energy data of each hour in 1 year, improve reliability and the restorability of energy data storage.

Accompanying drawing explanation

Fig. 1 is the multifunctional electric energy meter module map that the utlity model has redundancy electric energy data storage technology;

Fig. 2 is the ferroelectric memory wiring diagram that the utlity model has the multifunctional electric energy meter of redundancy electric energy data storage technology;

Fig. 3 is the multifunctional electric energy meter EPPROM storer circuit figure that the utlity model has redundancy electric energy data storage technology;

Fig. 4 is the multifunctional electric energy meter energy data Stored Procedure figure that the utlity model has redundancy electric energy data storage technology;

Fig. 5 is that the multifunctional electric energy meter energy data that the utlity model has redundancy electric energy data storage technology reads process flow diagram;

Embodiment

Below in conjunction with accompanying drawing, to the utlity model has the multifunctional electric energy meter of redundancy electric energy data storage technology, be described in further detail.

As shown in Figure 1, the multifunctional electric energy meter that the utlity model has redundancy electric energy data storage technology, comprising: CPU, three-phase voltage current analog input circuit, communication module, relay output module, switching input module, analog quantity transformation output module, ferroelectric memory, EPPROM storer, key-press module, clock chip, LCD display module and power module, consist of.CPU is connected with ferroelectric memory, EPPROM storer, three-phase voltage current simulated measurement input circuit, communication module, relay output module, switching input module, analog quantity transformation output module, key-press module, clock chip, LCD display module respectively.CPU can select SOC chip.

Fig. 2 shows the wiring diagram of the ferroelectric memory in above-mentioned electric energy meter, and described ferroelectric memory adopts FM25CL64 chip, its first pin , the 6th pin SCK, the 5th pin DI and the second pin DO be connected with the IO interface of CPU respectively, carries out reading and storing of energy data, adopts SPI interface sequence to store and read energy data.

Fig. 3 shows the wiring diagram of the EPPROM storer in above-mentioned electric energy meter, described EPPROM storer adopts 24C02 chip, its the 6th pin WP and the 5th pin SDA are connected with the IO interface of CPU respectively, as energy data supplementary storage, carry out the backup of energy data, the backup that adopts IIC Interface realization to carry out energy data is read and back-up storage.

Fig. 4 shows above-mentioned electric energy meter electric energy data Stored Procedure figure.CPU samples to the voltage in circuit, electric current by three-phase voltage current simulated measurement input circuit, and measuring voltage, current value calculate integral power P and electric energy E, wherein:

$P=\underset{n=0}{\overset{N-1}{\mathrm{\Σ}}}\mathrm{Un}\×\mathrm{In},$ $E=\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}\mathrm{Pi}\×\mathrm{Ti}..$

By judging whether electric energy increment surpasses, preset the storage that threshold value is carried out energy data, for example, the setting threshold of increment can be set as 1Wh/1varh, if increasing, electric energy surpasses 1Wh/1varh, in ferroelectric memory, store new energy data, as electric energy is not increased to 1Wh/1varh, storage of electrical energy data in ferroelectric memory not.Subsequently, whether judging distance CPU last time reached predetermined value to the time of EPPROM memory stores data, for example, be 1 hour, if reach predetermined value, new energy data and temporal information are stored in EPPROM storer, if do not reach predetermined value, proceed sampling monitoring.According to the actual requirements, EPPROM storer and the ferroelectric memory that can choose different capabilities carry out energy data storage.

Fig. 5 shows above-mentioned electric energy meter electric energy data and reads process flow diagram.Electric energy meter powers on, and CPU first reads the energy data of storing in ferroelectric memory, judges that whether check code is correct, if correctly, instrument is normal on LCD display module shows energy value, and works; If check code is incorrect, read and be stored in recent energy data on EPPROM storer, judge that whether check code is correct, if correctly, instrument normally shows energy value, and on LCD display module, shows the time of recording electric energy.If incorrect, read the energy data of last storage, judge, repeat this process, until read correct energy data.If can not obtain correct energy data, on LCD display module, Displaying Meter is abnormal.

The multifunctional electric energy meter that the utlity model has redundancy electric energy data storage technology can recover fast and accurately because the recovery of power source aging, single-chip microcomputer energy data while extremely causing electric instrument cisco unity malfunction, can compatible IIC interface, the ferroelectric memory of SPI interface or the middle data of EPPROM storer recover, ferroelectric memory and the EPPROM storer of compatible 3.3 volts and 5 volts working powers simultaneously.

Below the preferred embodiment of the invention is illustrated, but the invention is not limited to embodiment, those of ordinary skill in the art also can make all modification being equal to or replacement under the prerequisite without prejudice to the invention spirit, and the modification that these are equal to or replacement are all included in the application's claim limited range.

Claims (5)

1. a multifunctional electric energy meter with redundancy electric energy data storage technology, it is characterized in that, comprise: CPU, three-phase voltage current analog input circuit, ferroelectric memory, EPPROM storer, CPU is connected with ferroelectric memory, EPPROM storer, three-phase voltage current simulated measurement input circuit respectively

Three-phase voltage current simulated measurement input circuit is sampled to the voltage in circuit, electric current, and is transferred to CPU,

CPU measuring voltage, current value, calculate integral power and electric energy, and when electric energy increment surpasses while presetting threshold value, CPU is to the storage of carrying out energy data in ferroelectric memory; When distance C PU last time reaches predetermined value to time of EPPROM memory stores data, new energy data and temporal information are stored in EPPROM storer.

2. the multifunctional electric energy meter with redundancy electric energy data storage technology according to claim 1, it is characterized in that: described multifunctional electric energy meter also comprises communication module, relay output module, switching input module, analog quantity transformation output module, key-press module, clock chip, LCD display module and power module, above-mentioned each module is connected with CPU.

3. the multifunctional electric energy meter with redundancy electric energy data storage technology according to claim 1, is characterized in that: CPU selects SOC chip.

4. according to the multifunctional electric energy meter with redundancy electric energy data storage technology one of claim 1-3 Suo Shu, it is characterized in that: described ferroelectric memory adopts FM25CL64 chip, its first pin CS, the 6th pin SCK, the 5th pin DI and the second pin DO are connected with the IO interface of CPU respectively, carry out reading and storing of energy data, adopt SPI interface sequence to store and read energy data.

5. according to the multifunctional electric energy meter with redundancy electric energy data storage technology one of claim 1-3 Suo Shu, it is characterized in that: described EPPROM storer adopts 24C02 chip, its the 6th pin WP and the 5th pin SDA are connected with the IO interface of CPU respectively, as energy data supplementary storage, carry out the backup of energy data, the backup that adopts IIC Interface realization to carry out energy data is read and back-up storage.

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