CN201387448Y - Multi-functional electric energy meter with high-reliability data storage function - Google Patents
Multi-functional electric energy meter with high-reliability data storage function Download PDFInfo
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- CN201387448Y CN201387448Y CN200920144641U CN200920144641U CN201387448Y CN 201387448 Y CN201387448 Y CN 201387448Y CN 200920144641 U CN200920144641 U CN 200920144641U CN 200920144641 U CN200920144641 U CN 200920144641U CN 201387448 Y CN201387448 Y CN 201387448Y
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Abstract
The utility model provides a multi-functional electric energy meter with high-reliability data storage function, and relates to electric energy meters. The multi-functional electric energy meter comprises a microcontroller, a metering unit, a storage unit and a man-machine interface, wherein, the metering unit comprises a metering chip ATT7022B; the microcontroller is connected with the metering chip ATT7022B and the man-machine interface through data cables; the microcontroller is classified as a microcontroller adopting a Cortex-M3 inner core; the storage unit comprises a ferroelectric memory (FRAM), two electrically erasable read-only memories (E<2>PROM 1 and E<2>PROM 2), and a flash memory (FLASH); the FRAM is connected with the microcontroller through an SPI bus 1; the E<2>PROM 1 is connected with the microcontroller through an I2C bus 1; the E<2>PROM 2 is connected with the microcontroller through an I2C bus 2; and the FLASH is connected with the microcontroller through an SPI bus 2. The utility model has the advantages of simple and reasonable structure, strong anti-interference ability, and high data storage reliability, and can solve problems of data error and data loss.
Description
Technical field
The utility model relates to electric energy meter, a kind of specifically high reliability data storage multifunctional electric energy meter.
Background technology
Electric energy meter is the core measurement instrument of charging in the electric energy process of exchange, and the reliability of its accuracy, data is most important.Along with development of electronic technology, electric energy meter also transforms to the full electronic electric energy meter from mechanical induction type electric energy meter.Electronic electric energy meter can be stored data, and said data comprise:
(1) ammeter parameter,
(2) user is provided with parameter,
(3) current and historical energy data,
(4) load curve formed of instantaneous electrical quantity, i.e. load record, electrical quantity comprises voltage, electric current, power, power factor etc.,
(5) moment logout, time of taking place as decompression, defluidization incident and the electric weight when the decompression defluidization takes place etc.,
(6) maximum demand and time of origin thereof,
(7) status indicator allows sign etc. as power down sign, programming.
Storage data mode commonly used at present has:
(1) above-mentioned partial data is stored in the electric erasable read only storer E of microcontroller expansion
2Among the PROM,
(2) above-mentioned partial data is stored among the flash memory FLASH of microcontroller expansion,
(3) above-mentioned total data is stored in the built-in electric erasable read only storer E of microcontroller
2Among the PROM,
(4) above three kinds combination in any,
(5) ammeter parameter, user setup data, current and historical energy data are stored in electric erasable read only storer E
2Among the PROM, the load curve that instantaneous electrical quantity is formed is stored among the flash memory FLASH,
(6) above-mentioned total data is stored among the ferroelectric memory FRAM,
The prior art scheme has following shortcoming:
(1) adopts electric erasable read only storer E
2During PROM storage data, though E
2PROM is often erasable, but cost performance is low, capacity is little, and the running time is long, also needs after the operation to wait for a period of time, and has reduced storage efficiency.
When (2) adopting flash memory FLASH storage data, though FLASH cost performance height, capacity are big, erasable number of times is few.And FLASH generally adopts page or leaf to handle an enterprise schema, and efficient is low when non-page operations, increases erasable number of times, and the running time is long, and efficient is low.
When (3) adopting ferroelectric memory FRAM storage data, access speed is fast though FRAM has, the advantage of non-volatile ram, but also can take place unusually when running into special circumstances, receive when for example reading and writing data when pulse train, static discharge, moment strong electromagnetic radiation etc. disturbs, clock wire size or data-signal might be interfered and change should state, the mistake that reads and writes data occurs.
Because the working environment of electric energy meter is extremely abominable, surge in the electrical network, pulse train, cycle falls, interference such as strong moment electromagnetic radiation may be disturbed the normal operation of electric energy meter at any time, cause the maloperation of electric energy meter, the moment level variation of electronic circuit etc., so, only adopt the electric energy meter of one of above 6 kinds of data storage methods separately, error in data appears easily, serious problems such as loss of data, this brings economic dispute for the electric energy both parties, electric energy large user particularly, power consumption is big, record data are many, occur will causing great economic loss after the problems referred to above.
The utility model content
At the defective that exists in the prior art, the purpose of this utility model is to provide a kind of high reliability data storage multifunctional electric energy meter, and simple and reasonable, antijamming capability is strong, and the data storing reliability height can effectively solve error in data, data loss problem.
For reaching above purpose, the technical scheme that the utility model is taked is:
A kind of high reliability data storage multifunctional electric energy meter, comprise microcontroller, metering units, storage unit and man-machine interface, it is characterized in that: said metering units comprises computation chip ATT7022B, and microcontroller is connected with computation chip ATT7022B, man-machine interface respectively by data line; Said microcontroller is for adopting the microcontroller of Cortex-M3 kernel, and said storage unit comprises a ferroelectric memory FRAM, two electric erasable read only storer E
2PROM1, E
22, one flash memory FLASH of PROM, ferroelectric memory FRAM is connected electric erasable read only storer E by spi bus 1 with microcontroller
2PROM 1 is connected electric erasable read only storer E by I2C bus 1 with microcontroller
2PROM 2 is connected with microcontroller by I2C bus 2, and flash memory FLASH is connected with microcontroller by spi bus 2.
On the basis of technique scheme, said metering units also comprises current transformer and the resistor voltage divider circuit that is connected with the input port of computation chip ATT7022B.
On the basis of technique scheme, the capacity that is used to deposit the ferroelectric memory FRAM of energy data, historical electric weight, maximum demand, maximum demand time of origin, moment logout, maximum demand, status indicator, ammeter parameter is 256Kb; Be used for E to FRAM data+6CH backup
2The capacity of PROM 1 is 128KB; Be used for E to FRAM data+93H backup
2The capacity of PROM2 is 128KB; The capacity that is used to deposit the flash memory FLASH of load curve data is 8MB.
On the basis of technique scheme, ferroelectric memory FRAM, two electric erasable read only storer E
2PROM 1, E
2All according to actual needs by data block store, each data block all is divided into data division and check part to data among 2, one flash memory FLASH of PROM, and check part adopts verification and carries out checking treatment.
High reliability data storage multifunctional electric energy meter described in the utility model, simple and reasonable, antijamming capability is strong, and the data storing reliability height can effectively solve error in data, data loss problem.
Description of drawings
The utility model has following accompanying drawing:
The structural representation of Fig. 1 high reliability data storage multifunctional electric energy meter
Fig. 2 backup data store structure
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is the structural representation of high reliability data storage multifunctional electric energy meter described in the utility model, comprise microcontroller, metering units, storage unit and man-machine interface, said metering units comprises computation chip ATT7022B, and microcontroller is connected with computation chip ATT7022B, man-machine interface respectively by data line; Said microcontroller is for adopting the microcontroller of Cortex-M3 kernel, and said storage unit comprises a ferroelectric memory FRAM, two electric erasable read only storer E
2PROM 1, E
22, one flash memory FLASH of PROM, ferroelectric memory FRAM is connected electric erasable read only storer E by spi bus 1 with microcontroller
2PROM 1 is connected electric erasable read only storer E by I2C bus 1 with microcontroller
2PROM2 is connected with microcontroller by I2C bus 2, and flash memory FLASH is connected with microcontroller by spi bus 2.The utility model uses FRAM, E simultaneously
2Three kinds of storage unit stores data of PROM, FLASH, the FRAM read or write speed is fast, reading-writing life-span is unlimited, but price is higher, can utilize it to store the most frequent data of erasable number of times, E
2PROM carries out data backup, FLASH stores a large amount of monoblock data of handling through FRAM.Said SPI is Serial Peripheral Interface (Serial Peripheral interface), said I2C is a kind of universal serial bus (Inter-Integrated Circuit) by the exploitation of Philips company, adopt the universal serial bus mode can reduce the connection of the circuit of hardware, simplify the design of whole electric energy circuit.
On the basis of technique scheme, said metering units also comprises current transformer and the resistor voltage divider circuit that is connected with the input port of computation chip ATT7022B.
On the basis of technique scheme, the capacity that is used to deposit the ferroelectric memory FRAM of energy data, historical electric weight, maximum demand, maximum demand time of origin, moment logout, maximum demand, status indicator, ammeter parameter is 256Kb; Be used for E to FRAM data+6CH backup
2The capacity of PROM 1 is 128KB; Be used for E to FRAM data+93H backup
2The capacity of PROM2 is 128KB; The capacity that is used to deposit the flash memory FLASH of load curve data is 8MB.
On the basis of technique scheme, ferroelectric memory FRAM, two electric erasable read only storer E
2PROM 1, E
2All according to actual needs by data block store, each data block all is divided into data division and check part to data among 2, one flash memory FLASH of PROM, and check part adopts verification and carries out checking treatment.
On the basis of technique scheme, microprocessor reads data among the FRAM by data block, and carries out and verification, if verification and correct, then decision data is errorless, if checksum error then read E
2PROM1 and E
2PROM2 deducts respectively+6CH and+93H, with corresponding data relatively, as long as when having two or three data identical, think that then identical data are valid data; To being stored in FRAM and E
2PROM1, E
2Data among the PROM2 also will be carried out the timing comparing verification, prevent the data entanglement; If the contrast verification is not judged correct data yet and then is as the criterion with verification and correct data.
The utility model adopts FRAM, E
2PROM, FLASH three layer data storage modes.The FRAM read or write speed is fast, reading-writing life-span is unlimited, but price is higher, can utilize it to store the most frequent data of erasable number of times, E
2PROM carries out data backup, FLASH stores a large amount of monoblock data of handling through FRAM.Utilize the advantage of these three kinds of storeies, data are backed up, every piece of data is all carried out checking treatment, when same data are inconsistent in data check mistake or the different memory, to carry out all Backup Datas judges relatively, remove misdata, analyze correct data, thereby solve the data exception phenomenon.Concrete data processing method is as follows:
(1) FRAM, E
2The connected mode of these three kinds of storeies of PROM, FLASH and MCU is as follows: FRAM and FLASH have adopted SPI (Serial Peripheral interface, Serial Peripheral Interface) bus mode, and E
2PROM adopts I2C (Inter-IntegratedCircuit) bus mode, as shown in Figure 1.Adopt the universal serial bus mode, the circuit that reduces hardware connects, and adopts this data storage mechanism, can not make the design of whole electric energy circuit become complicated.
(2) FLASH is mainly used to store the load curve record data.
(3) FRAM deposits the energy data that per second refreshes, historical electric weight, maximum demand, maximum demand time of origin, moment logout, maximum demand, status indicator, ammeter parameter etc.And in FRAM, carry out FLASH data page tissue.The microcontroller per second reads the electric weight of a computation chip ATT7022B, and the energy data that adds up a time.ATT7022B is in the SPI data read process, the data that will on a fixing unit backup, once read, therefore in order to improve the correctness of microcontroller reading of data, after reading electric weight at every turn, read the data of a backup units again, and the data of twice of front and back are compared, if these two data are identical, and satisfy the load range (be in ammeter a period of time electric weight aggregate-value should less than this ammeter maximal value of electric weight accumulative total during this period of time) of this table, think that then data are reasonable, microprocessor carries out electric weight accumulative total, and in time data is write among the FRAM, otherwise abandons this electric weight accumulative total.Moment, data such as logout, maximum demand, load curve record organized in FRAM through certain way, and after satisfying the FLASH page operations, data were write among the FLASH by page or leaf.And then read just write data and with FRAM in data compare, remove corresponding data among the FRAM again after correct.
(4) become load curves record such as a voltage that page or leaf handles, electric current, power, power factor and the whole page or leaf of checking data to write FLASH through FRAM, both improved operating efficiency, strengthen the unfailing performance of data, significantly reduce number of operations again, increased its service time FLASH.
(5) ammeter parameter, user be provided with data such as parameter, historical electric weight, maximum demand, requirement time of origin, status indicator in FRAM by after the storage of certain organizational form piecemeal, and at E
2PROM1 and E
2Carry out double copies among the PROM2.The data layout of data in FRAM as shown in Figure 2.Each data block, N data before this, be at last the earlier data cell data verification and; At E
2Data among the PROM1 are not that FRAM simply backs up, but corresponding data+6CH (16 system number) among the FRAM, at E
2Data among the PROM2 are corresponding data+93H among the FRAM (16 system numbers).When microcontroller reads above data at ordinary times, reading of data from FRAM, and verification earlier, if verification and correct, then decision data is errorless, if checksum error then read E
2PROM1 and E
2PROM2 deducts 6CH and 93H respectively, with corresponding data relatively, as long as when having two or three data identical, think that then identical data are valid data.To being stored in FRAM and E
2PROM1, E
2Data among the PROM2 also will be carried out the timing comparing verification, prevent the data entanglement.If the contrast verification is not judged correct data yet and then is as the criterion with verification and correct data.
Key point of the present utility model is that the data of electric energy meter are classified, be stored in the device based on different storage principles, increase data check and many backups, and be stored in the memory device of different performance, thereby greatly improved the reliability of data, avoided factor to cause economic loss, adopted the Cortex-M3 series A RM kernel microcontroller of high-performance, low-power consumption according to wrong, lose etc., improve data check speed, reduced cost simultaneously.
Claims (4)
1. a high reliability data is stored multifunctional electric energy meter, comprise microcontroller, metering units, storage unit and man-machine interface, it is characterized in that: said metering units comprises computation chip ATT7022B, and microcontroller is connected with computation chip ATT7022B, man-machine interface respectively by data line; Said microcontroller is for adopting the microcontroller of Cortex-M3 kernel, and said storage unit comprises a ferroelectric memory FRAM, two electric erasable read only storer E
2PROM 1, E
22, one flash memory FLASH of PROM, ferroelectric memory FRAM is connected electric erasable read only storer E by spi bus 1 with microcontroller
2PROM 1 is connected electric erasable read only storer E by I2C bus 1 with microcontroller
2PROM 2 is connected with microcontroller by I2C bus 2, and flash memory FLASH is connected with microcontroller by spi bus 2.
2. high reliability data storage multifunctional electric energy meter as claimed in claim 1, it is characterized in that: said metering units also comprises current transformer and the resistor voltage divider circuit that is connected with the input port of computation chip ATT7022B.
3. high reliability data as claimed in claim 1 or 2 storage multifunctional electric energy meter is characterized in that: the capacity that is used to deposit the ferroelectric memory FRAM of energy data, historical electric weight, maximum demand, maximum demand time of origin, moment logout, maximum demand, status indicator, ammeter parameter is 256Kb; Be used for E to FRAM data+6CH backup
2The capacity of PROM 1 is 128KB; Be used for E to FRAM data+93H backup
2The capacity of PROM 2 is 128KB; The capacity that is used to deposit the flash memory FLASH of load curve data is 8MB.
4. high reliability data storage multifunctional electric energy meter as claimed in claim 3 is characterized in that: ferroelectric memory FRAM, two electric erasable read only storer E
2PROM 1, E
2All according to actual needs by data block store, each data block all is divided into data division and check part to data among the PROM2, flash memory FLASH, and check part adopts verification and carries out checking treatment.
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| CN200920144641U CN201387448Y (en) | 2009-02-25 | 2009-02-25 | Multi-functional electric energy meter with high-reliability data storage function |
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| CN200920144641U CN201387448Y (en) | 2009-02-25 | 2009-02-25 | Multi-functional electric energy meter with high-reliability data storage function |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923112A (en) * | 2010-07-26 | 2010-12-22 | 珠海中慧微电子有限公司 | Method for managing high reliability of electric energy measurement data |
| CN102253279A (en) * | 2011-06-03 | 2011-11-23 | 青岛乾程电子科技有限公司 | Reliable data storage type multifunctional electric meter |
| CN102520242A (en) * | 2011-12-12 | 2012-06-27 | 宁夏隆基宁光仪表有限公司 | Recording method of load curves of electric energy meter |
| CN102520222A (en) * | 2011-10-28 | 2012-06-27 | 宁波三星电气股份有限公司 | Electric energy meter system anti-interference control method |
| CN102645581A (en) * | 2012-04-28 | 2012-08-22 | 江苏省电力公司南通供电公司 | Low-tension electricity metering device |
| CN104007411A (en) * | 2014-06-13 | 2014-08-27 | 遵义长征电器开关设备有限责任公司 | Detection and control device for multi-function watt-hour meter |
| CN104281536A (en) * | 2014-09-28 | 2015-01-14 | 株洲南车时代电气股份有限公司 | Device and method for separated storage of data |
| CN104571961A (en) * | 2014-12-31 | 2015-04-29 | 深圳市成为信息技术有限公司 | Data verification backup, writing and reading method for triangle type memory device |
| CN105739928A (en) * | 2016-01-29 | 2016-07-06 | 山东鲁能智能技术有限公司 | Multi-region storage based parameter storage method for distribution network terminal device |
| CN106708440A (en) * | 2016-12-26 | 2017-05-24 | 深圳市科陆电子科技股份有限公司 | Electric energy meter and data storage method for load curve of electric energy meter |
| CN108122594A (en) * | 2017-12-19 | 2018-06-05 | 宁波三星医疗电气股份有限公司 | A kind of efficient intelligent electric energy meter date storage method and its intelligent electric energy meter |
| CN108152780A (en) * | 2017-11-23 | 2018-06-12 | 广州市首试科技有限公司 | A kind of intelligent appliance electric energy metering device |
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- 2009-02-25 CN CN200920144641U patent/CN201387448Y/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923112A (en) * | 2010-07-26 | 2010-12-22 | 珠海中慧微电子有限公司 | Method for managing high reliability of electric energy measurement data |
| CN102253279A (en) * | 2011-06-03 | 2011-11-23 | 青岛乾程电子科技有限公司 | Reliable data storage type multifunctional electric meter |
| CN102520222A (en) * | 2011-10-28 | 2012-06-27 | 宁波三星电气股份有限公司 | Electric energy meter system anti-interference control method |
| CN102520242A (en) * | 2011-12-12 | 2012-06-27 | 宁夏隆基宁光仪表有限公司 | Recording method of load curves of electric energy meter |
| CN102645581A (en) * | 2012-04-28 | 2012-08-22 | 江苏省电力公司南通供电公司 | Low-tension electricity metering device |
| CN102645581B (en) * | 2012-04-28 | 2013-06-05 | 国家电网公司 | Low-tension electricity metering device |
| CN104007411A (en) * | 2014-06-13 | 2014-08-27 | 遵义长征电器开关设备有限责任公司 | Detection and control device for multi-function watt-hour meter |
| CN104281536A (en) * | 2014-09-28 | 2015-01-14 | 株洲南车时代电气股份有限公司 | Device and method for separated storage of data |
| CN104571961A (en) * | 2014-12-31 | 2015-04-29 | 深圳市成为信息技术有限公司 | Data verification backup, writing and reading method for triangle type memory device |
| CN104571961B (en) * | 2014-12-31 | 2018-01-09 | 深圳市成为信息技术有限公司 | Data check backup, write-in and the read method of a kind of trigonometric expression storage device |
| CN105739928A (en) * | 2016-01-29 | 2016-07-06 | 山东鲁能智能技术有限公司 | Multi-region storage based parameter storage method for distribution network terminal device |
| CN106708440A (en) * | 2016-12-26 | 2017-05-24 | 深圳市科陆电子科技股份有限公司 | Electric energy meter and data storage method for load curve of electric energy meter |
| CN108874298A (en) * | 2017-05-15 | 2018-11-23 | 深圳市奇辉电气有限公司 | A kind of method and device of data storage |
| CN108874298B (en) * | 2017-05-15 | 2021-08-03 | 深圳市奇辉电气有限公司 | Data storage method and device |
| CN108152780A (en) * | 2017-11-23 | 2018-06-12 | 广州市首试科技有限公司 | A kind of intelligent appliance electric energy metering device |
| CN108122594A (en) * | 2017-12-19 | 2018-06-05 | 宁波三星医疗电气股份有限公司 | A kind of efficient intelligent electric energy meter date storage method and its intelligent electric energy meter |
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Granted publication date: 20100120 Termination date: 20130225 |