CN1117590A - Method for data memory - Google Patents
Method for data memory Download PDFInfo
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- CN1117590A CN1117590A CN 95103682 CN95103682A CN1117590A CN 1117590 A CN1117590 A CN 1117590A CN 95103682 CN95103682 CN 95103682 CN 95103682 A CN95103682 A CN 95103682A CN 1117590 A CN1117590 A CN 1117590A
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- power supply
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- memory
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Abstract
The data memory stores data in RAM under normal power supply and uses stand by-power source and energy storing element to store data in case of power failure. It is guaranteed against loss of data in long term. It can be used in real time measuring system.
Description
A kind of method that is used for the measurement data memory especially for the memory of surveying instrument instrumented datas such as intelligent kilowatt-hour meter (electric energy meter), intellectual water meter, intelligent gas meter.
The method of known measuring memory data, the standby power supply of passing through is arranged, the real time data of measuring is stored in preservation in the random memory ram gets off, also have by measurement data is left in do not lose can long preservation reservoir EEPROM in preserve, but these two kinds of store methods close the problem that all exists separately at some, poor by standby power supply storage data cost high reliability, and be subjected to the restriction of battery life, though storing data by EEPROM is difficult for losing, but because its storage number of times is limited, to some data that often change, just can't use.
Task of the present invention is the simple and easy new method of preserving the memory real-time measuring data reliably of a kind of energy of invention.
Fig. 1 is a block diagram of the present invention.Unit among the figure [1] is a real-time measurement system, unit [2] is a random memory ram, [3] but be the reservoir (such as being EEPROM) of the long preservation data that can rewrite, [4] be an energy storage unit, [5] be external circuit normal power supply observation circuit, a, b two ends provide outside operate as normal power supply.
The present invention is achieved in that the data that at first will remember are divided into two classes, the first kind Effectively to write less than reservoir [3] at the total degree of whole system data variation in projected life Enter within the total degree, these class data deposit directly at any time that (this class data also in the reservoir [3] in Can regardless of, all as secondary sources): Equations of The Second Kind is in whole system in projected life, The data variation total degree is write (also can will all counting of indegree life-span more than or equal to reservoir [3] According to treating as these class data), when these class data work at a b two ends additional power source, be stored in In the RAM reservoir [2]. When the additional power source reduction, observation circuit [5] is measured power circuit will be not During the energy normal power supply, automatically notify real-time measurement system [1], it is low that measuring system is entered Power consumption running status, and the power supply that relies on remaining power supply and energy storage parts [4] to provide will need But the data of memory deposit in the reservoir [3] of long preservation data.
1 one kinds of methods that are used for the measurement data memory especially for the memory of monitoring instrument instrumented datas such as intelligent kilowatt-hour meter (electric energy meter), intellectual water meter, intelligent gas meter, have random memory [2] at least but the reservoir [3] of read-write long preservation data and deposit can parts [4], it is characterized in that
A is when the power supply normal power supply, and data are to leave in the random memory [2] (the data that often change can directly not deposit in the reservoir [3] yet) in,
B powers when undesired monitoring power supply, the power supply that relies on remaining power supply and energy storage parts [4] to provide, but the data that will remember again deposit in the reservoir [3] of long preservation data.
When the present invention passes through the power supply normal power supply, with deposit data in the RAM reservoir, and in power process, the data that will need again to remember by remaining power supply and energy storage unit [4] deposit in the reservoir with long preservation period [3], reduced the number of times that deposits in of reservoir [3], brought into play the speciality of [2] and [3] two kinds of different qualities reservoirs, finished the task that the present invention proposes, cost of the present invention is low, circuit is simple, can be widely used in particularly occasions such as intelligent kilowatt-hour meter, intellectual water meter, intelligent gas meter of real-time measurement system.
A kind of embodiment, energy storage parts [4] are the electric capacity that capacity is enough big, when outer power supply source voltage reduces, observation circuit [5] is notified real-time measurement system [1] immediately, but data instant is deposited in the memory [3] of long preservation data, energy storage parts [4] and remaining power supply provide enough power supplys, data are all deposited in reservoir [3].
A kind of embodiment, can rewrite can the long preservation data reservoir [3] be an EEPROM reservoir.
A kind of embodiment, after power supply voltage reduces, measuring system [1] deposits data in reservoir [3], but at this moment service restoration is normal, data might be in the process that is depositing in, for error does not take place the data that guarantee to deposit in, during the fixed response time of the present invention by hardware or software or locking, only guarantee to carry out other operation after depositing data in all finishing.
Claims (4)
1 one kinds of methods that are used for the measurement data memory especially for the memory of monitoring instrument instrumented datas such as intelligent kilowatt-hour meter (electric energy meter), intellectual water meter, intelligent gas meter, have random memory [2] at least but the reservoir [3] of read-write long preservation data and deposit can parts [4], it is characterized in that
A is when the power supply normal power supply, and data are to leave (the data that often change can directly not deposit in the reservoir [3] yet) in the random memory [2] in
B powers when undesired monitoring power supply, the power supply that relies on remaining power supply and energy storage parts [4] to provide, but the data that will remember again deposit in the reservoir [3] of long preservation data.
2 is the electric capacity that capacity is enough big according to the described storage component of claim 1 [4] Ji Tezheng.
But 3 according to the described long preservation reservoir [3] of rewriting of claim 1, it is characterized in that a kind of EEPROM reservoir.
4 power when undesired at power supply according to claim 1 is described, rely on remaining power supply and energy storage parts [4] that power supply is provided, will data memory depositing reservoir [3] in is characterized in that, before the process that is written into reservoir [3] does not finish, during fixed response time by hardware or software or locking, do not allow to interrupt this ablation process (comprise and at this moment recover normal power supply).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95103682 CN1117590A (en) | 1995-04-11 | 1995-04-11 | Method for data memory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95103682 CN1117590A (en) | 1995-04-11 | 1995-04-11 | Method for data memory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1117590A true CN1117590A (en) | 1996-02-28 |
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ID=5074794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95103682 Pending CN1117590A (en) | 1995-04-11 | 1995-04-11 | Method for data memory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1117590A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103137166A (en) * | 2013-01-04 | 2013-06-05 | 上海徽俊电子技术有限公司 | Car audio instant passive break-point memory device |
| CN111273853A (en) * | 2018-12-04 | 2020-06-12 | 宝沃汽车（中国）有限公司 | Vehicle EEPROM data storage method, device, equipment and medium |
-
1995
- 1995-04-11 CN CN 95103682 patent/CN1117590A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103137166A (en) * | 2013-01-04 | 2013-06-05 | 上海徽俊电子技术有限公司 | Car audio instant passive break-point memory device |
| CN103137166B (en) * | 2013-01-04 | 2015-11-18 | 上海徽俊电子技术有限公司 | A kind of car audio instant passive break-point memory device |
| CN111273853A (en) * | 2018-12-04 | 2020-06-12 | 宝沃汽车（中国）有限公司 | Vehicle EEPROM data storage method, device, equipment and medium |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |