CN103389411A - Multifunctional watt-hour meter and electric energy data recovery method thereof - Google Patents

Abstract

The invention discloses a multifunctional watt-hour meter and an electric energy data recovery method thereof. The multifunctional watt-hour meter comprises a CPU (central processing unit), a three-phase voltage and current analog input circuit, a ferroelectric memory and an EPPROM (electrically erasable programmable read-only memory), wherein the CPU is connected with the ferroelectric memory; the EPPROM and the three-phase voltage and current analog input circuit respectively; the three-phase voltage and current analog input circuit collects voltage and a current in a circuit and transmits the voltage and the current to the CPU; the CUP calculates accumulative power and electric energy and stores electric energy data to the ferroelectric memory; and the EPPROM backups the electric energy data. The multifunctional watt-hour meter can perform redundancy storage on the electric energy data; and the electric energy data recorded at fixed time are stored as required, and the reliability and the restorability for the electric energy data storage are improved.

Description

Multifunctional electric energy meter and energy data restoration methods thereof

Technical field

The invention belongs to the electronic instrument technical field, relate to a kind of multifunctional electric energy meter and energy data restoration methods thereof 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 is as the terminal of strong intelligent grid, and the construction of intelligent sturdy power grid is had vital role.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 the energy data storage and read more at present.In case at multifunctional electric energy meter, write ferroelectric sequential mistake because interference causes during in the storage of electrical energy data, 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 to the user, cause trouble.

Summary of the invention

for solving the problems of the technologies described above, the object of the present invention is to provide a kind of multifunctional electric energy meter with redundancy electric energy data storage technology, comprise: CPU, the three-phase voltage current analog input circuit, ferroelectric memory, the EPPROM storer, CPU respectively with ferroelectric memory, the EPPROM storer, the three-phase voltage current simulated measurement input circuit connects, the three-phase voltage current simulated measurement input circuit is to the voltage in circuit, electric current is sampled, and be transferred to CPU, the CPU measuring voltage, current value, calculate integral power and electric energy, when the 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 the 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 the SOC chip.

Also have, described ferroelectric memory adopts the 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 the SPI interface sequence to store and read energy data.

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

The present invention also provides a kind of data reconstruction method with electric energy meter of ferroelectric memory and EPPROM storer, when electric energy meter need to carry out the data recovery, reads energy data from ferroelectric memory and EPPROM storer, when electric energy meter storage data:

The first step, sample to the voltage in circuit, electric current, and measuring voltage, current value calculate integral power P and electric energy E,

Second step, judge that the electric energy increment, whether over presetting threshold value, surpasses setting threshold if electric energy increases, and the new energy data of storage in ferroelectric memory, be no more than setting threshold as electric energy, do not store new energy data in ferroelectric memory,

The 3rd step, whether judging distance last time reached predetermined value to the time of EPPROM memory stores data,, if reach predetermined value, new energy data and temporal information was stored in the EPPROM storer,, if do not reach predetermined value, proceed sampling monitoring.

In addition, when electric energy meter need to carry out the data recovery: read the energy data of storing in ferroelectric memory, judge whether the check code in data streams read is correct, if correct, these data are returned in electric energy meter,, if check code is incorrect, reads and be stored in recent energy data on the EPPROM storer.

In addition, read energy data from the EPPROM storer after, judge whether the check code in data streams read is correct,, if correct, these data are returned in electric energy meter, if check code is incorrect, the energy data of once storing before reading in the EPPROM storer, judge, repeat this process, until read correct energy data.If can not obtain correct energy data, electric energy meter is abnormal.

Also have, electric energy meter shows the information and the duty of electric energy meter storage time that reads energy data from the EPPROM storer.

Have, integral power P and electric energy E calculate by following formula again:

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

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

Description of drawings

Fig. 1 is multifunctional electric energy meter module map of the present invention;

Fig. 2 is the ferroelectric memory wiring diagram of multifunctional electric energy meter of the present invention;

Fig. 3 is multifunctional electric energy meter EPPROM storer circuit figure of the present invention;

Fig. 4 is multifunctional electric energy meter energy data Stored Procedure figure of the present invention;

Fig. 5 is that multifunctional electric energy meter energy data of the present invention reads process flow diagram;

Embodiment

Below in conjunction with accompanying drawing, the multifunctional electric energy meter that the present invention has redundancy electric energy data storage technology is described in further detail.

As shown in Figure 1, the present invention has the multifunctional electric energy meter of 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 the SOC chip.

Fig. 2 shows the wiring diagram of the ferroelectric memory in above-mentioned electric energy meter, described ferroelectric memory adopts the 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 the 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 the 24C02 chip, its the 6th pin WP and the 5th pin SDA are connected with the IO interface of CPU respectively, as the energy data supplementary storage, carry out the backup of energy data, the backup of adopting the 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 the 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 the electric energy increment carries out the storage of energy data over presetting threshold value, for example, the setting threshold of increment can be set as 1Wh/1varh, if increasing, electric energy surpasses 1Wh/1varh, the new energy data of storage in ferroelectric memory, be not increased to 1Wh/1varh as electric energy, 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, was for example 1 hour, if reach predetermined value, new energy data and temporal information are stored in the 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 the 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 whether check code is correct, if correctly instrument is normal on the LCD display module shows energy value and normal operation; If check code is incorrect, read and be stored in recent energy data on the EPPROM storer, judge whether check code is correct, if correctly instrument normally shows energy value, and show the time of recording electric energy on the LCD display module.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, Displaying Meter is abnormal on the LCD display module.

The multifunctional electric energy meter that the present invention has a redundancy electric energy data storage technology can recover fast and accurately because power source aging, the recovery of energy data when single-chip microcomputer causes the electric instrument cisco unity malfunction extremely, can compatible IIC interface, the ferroelectric memory of SPI interface or the middle data of EPPROM storer recover, simultaneously compatible 3.3 volts and 5 couchers are made ferroelectric memory and the EPPROM storer of power supply.

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 that is equal to or replacement under the prerequisite without prejudice to the invention spirit, the modification that these are equal to or replacement all are included in the application's claim limited range.

Claims (10)

1. a multifunctional electric energy meter, is characterized in that, comprising: CPU, three-phase voltage current analog input circuit, ferroelectric memory, EPPROM storer, CPU are connected with ferroelectric memory, EPPROM storer, three-phase voltage current simulated measurement input circuit respectively,

The 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 the 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 the EPPROM storer.

2. multifunctional electric energy meter 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, and above-mentioned each module is connected with CPU.

3. multifunctional electric energy meter according to claim 1, it is characterized in that: CPU selects the SOC chip.

4. one of according to claim 1-3 described multifunctional electric energy meters, it is characterized in that: described ferroelectric memory adopts FM25CL64 chip, its first pin

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 the SPI interface sequence to store and read energy data.

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

6. the data reconstruction method of a multifunctional electric energy meter, when electric energy meter need to carry out the data recovery, read energy data from ferroelectric memory and EPPROM storer, it is characterized in that, when electric energy meter storage data:

The first step, sample to the voltage in circuit, electric current, and measuring voltage, current value calculate integral power P and electric energy E,

Second step, judge that the electric energy increment, whether over presetting threshold value, surpasses setting threshold if electric energy increases, and the new energy data of storage in ferroelectric memory, be no more than setting threshold as electric energy, do not store new energy data in ferroelectric memory,

The 3rd step, whether judging distance last time reached predetermined value to the time of EPPROM memory stores data,, if reach predetermined value, new energy data and temporal information was stored in the EPPROM storer,, if do not reach predetermined value, proceed sampling monitoring.

7. the data reconstruction method of multifunctional electric energy meter as claimed in claim 6 is characterized in that: when electric energy meter need to carry out data while recovering:

The 4th step, read the energy data of storing in ferroelectric memory,

In the 5th step, judge whether the check code in data streams read is correct,, if correct, these data returned in electric energy meter,, if check code is incorrect, reads and be stored in recent energy data on the EPPROM storer.

8. the data reconstruction method of multifunctional electric energy meter as claimed in claim 7, it is characterized in that: in the 5th step, read energy data from the EPPROM storer after, judge whether the check code in data streams read is correct, if correct, these data are returned in electric energy meter, if check code is incorrect, read in the EPPROM storer before once the storage energy data, judge, repeat this process, until read correct energy data.If can not obtain correct energy data, electric energy meter is abnormal.

9. the data reconstruction method of multifunctional electric energy meter as claimed in claim 8 is characterized in that: electric energy meter shows the information and the duty of electric energy meter storage time that reads energy data from the EPPROM storer.

10., as the data reconstruction method of one of claim 6-9 described multifunctional electric energy meter, it is characterized in that: integral power P and electric energy E calculate by following formula:

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

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