CN110736873A - clock repairing method, power terminal and power system - Google Patents
clock repairing method, power terminal and power system Download PDFInfo
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- CN110736873A CN110736873A CN201911038826.6A CN201911038826A CN110736873A CN 110736873 A CN110736873 A CN 110736873A CN 201911038826 A CN201911038826 A CN 201911038826A CN 110736873 A CN110736873 A CN 110736873A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
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- G04G—ELECTRONIC TIME-PIECES
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Abstract
The invention provides clock repairing methods, an electric power terminal and an electric power system, and relates to the technical field of electric power terminals, wherein the clock repairing method is applied to the electric power terminal, the electric power terminal comprises a ferroelectric, a soft clock and a clock power supply, and the electric power terminal is also in communication connection with or a plurality of electric energy meters.
Description
Technical Field
The invention relates to the technical field of power terminals, in particular to clock repairing methods, a power terminal and a power system.
Background
At present, users pay more attention to the stability of the power terminal as of the power terminal is widely used.
In the use process of the power terminal, due to the fact that the terminal is placed for a long time or power supply manufacturers are different, the problem of undervoltage of a clock power supply is caused to occur continuously, when the clock power supply has a problem, the power terminal is powered off and can be restarted, and a hard clock cannot be synchronized to a soft clock.
After the problem of power source undervoltage occurs, the current commonly adopted measures are to acquire the time of an electric energy meter connected under the power terminal and then synchronize the time of the electric energy meter to a soft clock. However, in practical applications, the time of the power meter may also be in error, which results in a large discrepancy between the time recorded by the soft clock of the power terminal and the actual time.
In summary, after the power supply has an under-voltage problem, if the time of the electric energy meter is directly synchronized to the soft clock, a problem of a large difference with the actual time may occur.
Disclosure of Invention
The invention aims to provide clock repairing methods, a power terminal and a power system, which are used for solving the problem that in the prior art, when the time of an electric energy meter is directly synchronized to a soft clock after the power supply is under-voltage, the synchronized time and the actual time are in great difference.
In order to solve the problems, the invention provides the following technical scheme:
, the present application provides clock recovery methods for use with a power terminal that includes a ferroelectric, soft clock, clock power source, and that is also communicatively coupled to or more power meters, the method comprising:
when the clock power is down, the ferroelectric is written to th time;
when the clock power supply is powered on again and the second time of the electric energy meter is obtained;
judging whether the absolute value of the difference value of the second time and the th time is larger than a th threshold value;
if so, synchronizing the second time to a soft clock;
if not, the th time is synchronized to a soft clock to enable clock recovery.
, the power terminal is further communicatively connected to a master station, and after the step of synchronizing the second time to the soft clock or synchronizing the th time to the soft clock, the clock recovery method further comprises:
and when the clock is synchronized with the master station, synchronizing the clock provided by the master station to the soft clock.
, the step of writing the ferroelectric at th time when the clock power is turned off comprises:
periodically writing a current time in the ferroelectric;
when the clock power is turned off, the time closest to the time of the clock power being turned off in the ferroelectric is taken as the th time.
, the ferroelectric includes a plurality of memory spaces, and each of the memory spaces includes a plurality of memory subspaces, the step of periodically writing the current time in the ferroelectric includes:
periodically writing a current time within the storage subspace.
, when the power terminal is communicatively connected to a plurality of power meters, the step of obtaining the second time of the power meter comprises:
acquiring the time of each electric energy meter, and calculating the average time of the plurality of electric energy meters by using the time of each electric energy meter;
taking the average time as the second time.
, the power terminal further includes a hard clock, the clock power source is configured to provide power to the hard clock, and after the step of powering back on the clock power source, the method further comprises:
judging whether the voltage of the clock power supply is stable or not;
if not, executing the step of obtaining the second time of the electric energy meter;
if so, synchronizing the hard clock to the soft clock.
Further , the power terminal further includes a hard clock, and after the step of powering back on the clock power source, the method further comprises:
judging whether a second time of acquiring the electric energy meter is obtained;
if yes, executing the step of judging whether the absolute value of the difference value between the second time and the th time is larger than a th threshold value;
if not, judging whether the third time of the hard clock is abnormal or not;
if so, synchronizing the th time to the soft clock;
if not, synchronizing the third clock to the soft clock.
, the step of determining whether the third time of the hard clock is abnormal includes:
judging whether the absolute value of the difference value between the third clock and the th time is greater than a second threshold value;
if so, determining that a third time of the hard clock is abnormal;
if not, determining that the third time of the hard clock is normal.
In a second aspect, the present application also provides power terminals capable of performing the above-described method.
In a third aspect, the present application further provides power systems, where the power systems include a master station, or more power meters, and the power terminals are respectively connected to the master station and the power meters in communication.
Compared with the prior art, the method has the following beneficial effects:
the application provides clock recovery methods, a power terminal and a power system, the clock recovery methods are applied to the power terminal, the power terminal comprises a ferroelectric, a soft clock and a clock power source, and the power terminal is also in communication connection with or more power meters.
Drawings
Fig. 1 is an schematic flowchart of a clock recovery method according to an embodiment of the present application.
Fig. 2 is a flowchart of sub-steps of S102 in fig. 1 according to an embodiment of the present disclosure.
Fig. 3 is a second schematic flowchart of a clock recovery method according to an embodiment of the present application.
Fig. 4 is a third schematic flowchart of a clock recovery method according to an embodiment of the present application.
Fig. 5 is an interaction diagram of a power system according to an embodiment of the present disclosure.
Description of reference numerals:
200-a power system; 210-a power terminal; 220-a master station; 230-electric energy meter.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
th embodiment
As described in the background art, when the power source under-voltage problem occurs, directly uses the method of obtaining the time of the electric energy meter to directly synchronize the time of the electric energy meter to the soft clock, however, this implementation method may have a large error, that is, when the time of the electric energy meter is not accurate, the time of the synchronized soft clock is different from the actual time greatly.
In view of this, according to the application, after the time of the electric energy meter is obtained, the difference between the electric energy meter and the ferroelectric time is calculated, and then the difference is compared with the threshold value, so as to determine whether the time of the electric energy meter needs to be synchronized to the soft clock, so that the difference between the soft time and the actual time is smaller.
The following takes the power terminal as an execution subject to exemplarily explain the clock recovery method provided by the present application, and please refer to fig. 1, the method includes:
s102, when the clock power supply is powered down, the ferroelectric is written into th time.
S104, after the clock power supply is powered on again and the second time of the electric energy meter is acquired, judging whether the absolute value of the difference value between the second time and the th time is larger than a th threshold value, if so, executing S106, and if not, executing S108.
And S106, synchronizing the second time to the soft clock.
And S108, synchronizing the th time to a soft clock to realize clock repair.
Among them, ferroelectric is also called ferroelectric memory (FRAM), which is kinds of random access memory, and it has the capability of retaining data after power is turned off, i.e. when data is written in ferroelectric, data before ferroelectric power is turned off can still be read from ferroelectric after ferroelectric power is turned off and power is turned on.
When the clock power supply is powered down, the soft clock writes the current th time into the ferroelectric, so that the th time stored in the ferroelectric does not disappear even if the power terminal is under-voltage and powered down, after the clock power supply is powered up again, the power terminal can obtain the second time of the electric energy meter because the electric energy meter can also record the time by the clock, and after the second time is obtained, whether the second time meets the requirement needs to be judged, wherein the clock power supply can be a battery.
The judgment method comprises the steps of calculating the absolute value of the difference value of the th time of the second time, judging whether the absolute value of the difference value is larger than the th threshold value, synchronizing the second time to the soft clock if the absolute value of the difference value is larger than the th threshold value, and synchronizing the th time to the soft clock if the absolute value of the difference value is not larger than the th threshold value.
It will be appreciated that since the undervoltage is applied before and then applied again, a difference is determined between the th time written in the ferroelectric and the actual time after the application of power , for example, at 12:00:00, the undervoltage condition of the power terminal occurs, causing the power terminal to stop working, at which time the power terminal is written in the ferroelectric at 12:00: 00.
It was verified that the th time recorded in the ferroelectric was closer to the actual value since the absolute value of the difference between the second time and the th time was relatively small, and the th time recorded in the ferroelectric was synchronized to the soft clock, and the second time recorded by the power meter was closer to the actual time when the absolute value of the difference between the second time and the th time was relatively large, and the second time recorded by the power meter was synchronized to the soft clock.
, the threshold is set to 1min, however, in other implementations, the threshold may be set to other times, which is not limited in this respect.
Through the implementation mode, the synchronized soft clock can be more accurate.
Referring to fig. 2 as implementation manners of the present application, the step S102 actually includes:
s102-1, periodically writing the current time in the ferroelectric.
And S102-2, when the clock power supply is powered down, taking the time closest to the power down time of the clock power supply in the ferroelectric as th time.
Namely, when the power terminal normally works, the soft clock is the time after the time setting, namely, the time displayed by the soft clock is the standard time. And, in order to prevent that the corresponding time is not stored in the ferroelectric when the power down occurs to the power terminal, the soft clock periodically writes the current time in the ferroelectric when the power terminal is operating normally.
For example, every minutes, the soft clock writes the current time into the ferroelectric, so that the ferroelectric can store the time of continuous update, for example, the storage time is 12:00:00, 12:01:00 … 13:00:00 when under-voltage power-down occurs, the soft clock may write the current time into the ferroelectric at the time of power-down, or may not write due to under-voltage, for example, when under-voltage power-down occurs at 13:00:30, the soft clock may write the time point 13:00:30 into the ferroelectric at this time, or may not write, so that when the time is determined, the power terminal may use the time closest to the power-down time of the clock power supply in the ferroelectric as the th time, in other words, the power terminal may use the latest written time point in the ferroelectric as the th time.
For example, when under-voltage power-down occurs at 13:00:30, if the soft clock writes the time point into the ferroelectric at this time, 13:00:30 is regarded as th time, and if the soft clock does not write the time zone into the ferroelectric at this time, 13:00:00 is regarded as th time.
Further, since time is periodically written into the ferroelectric, the number of times of erasing and writing of the ferroelectric increases, and the service life of the ferroelectric decreases.
In view of this, as implementations of the present application, the ferroelectric memory includes a plurality of memory spaces, and each memory space includes a plurality of memory subspaces, S102-1 actually includes:
the current time is periodically written in the storage subspace.
It can be understood that, at the time of writing, time points occupy memory spaces of the ferroelectric, whereas in the present application, since the ferroelectric is provided with a plurality of memory sub-spaces, time points occupy only memory sub-spaces of the ferroelectric when storing.
For example, 10 storage spaces each including 20 storage subspaces are included in the ferroelectric, and in the prior art, since each time point occupies storage spaces, after 10 time points are written, if writing is performed again, the ferroelectric erases the previously written time points to write a new time point, and in the present application, since each storage subspace can store time points, it needs to write 20 time points to continue writing storage spaces.
The effect of changing time in space is achieved through the implementation mode, namely, the ferroelectric erasing times are greatly reduced by refreshing the ferroelectric times to 1/20 which is the original ferroelectric times, meanwhile, the refreshing frequency can be improved, the accuracy of clock data is improved, and the service life is also prolonged.
And the power terminal also comprises a hard clock, the clock power supply is used for supplying power to the hard clock, and when the power terminal normally works, the accuracy of the display time of the soft clock is realized by adopting a mode that the hard clock is synchronous to the soft clock.
As implementations of the present application, after the step of powering back on the clock power supply, referring to fig. 3, the method further includes:
s103-1, judging whether the voltage of the clock power supply is stable. If so, S103-2 is performed. And if not, executing the step of acquiring the second time of the electric energy meter.
S103-2, synchronizing the hard clock to the soft clock.
When the power terminal is powered on again after undervoltage power failure, two situations may exist, wherein the th situation is that the battery is replaced by the worker again, and the second situation is that the battery is not replaced by the worker, that is, the situation that the battery is still undervoltage may occur, or the battery can stably supply power.
The power terminal needs to judge whether the voltage of the clock power supply is stable after being powered on again, as implementation modes, the mode of judging whether the voltage is stable can be to judge whether the fluctuation of the voltage is too large, for example, the voltage detected in the upper time periods is 5V, and the voltage detected in the lower time periods is 3V, which indicates that the voltage fluctuation is large and the voltage of the clock power supply is not stable.
As implementation manners of the present application, after the step of powering on the clock power supply again, referring to fig. 4, the method further includes:
s103-3, judging whether the second time of the electric energy meter is acquired, if so, executing a step of judging whether the absolute value of the difference value between the second time and the th time is greater than a th threshold, otherwise, executing S103-4.
S103-4, judging whether the third time of the hard clock is abnormal or not. If so, S103-5 is performed, and if not, S103-6 is performed.
And S103-5, synchronizing the th time to a soft clock.
S103-6, the third clock is synchronized to the soft clock.
That is, when the voltage of the clock power source is unstable, the power terminal may obtain the second time of the power meter, but there may be a case where the power terminal cannot obtain the second time, for example, the power meter is not online at this time, which may result in that the power terminal cannot obtain the time of the power meter.
On the basis, when the clock power supply is unstable, the time of the hard clock is only the time error recorded with a certain probability of , but not the time is determined to have a fault, so if the second time cannot be acquired, the power terminal continues to acquire the third time of the hard clock at that time, and determines whether the third time is abnormal.
As implementation manners of the present application, the determining whether the third time is abnormal is performed by determining whether an absolute value of a difference between the third clock and the th time is greater than a second threshold, if so, determining that the third time of the hard clock is abnormal, and if not, determining that the third time of the hard clock is normal.
For example, when the second threshold is set to days, will generally be completed in a very short time for maintenance of the power terminal, and will generally not exceed days, so when power is turned on again after power-down under voltage occurs, if the third time of the hard clock is different from the th time of the ferroelectric by more than days, it indicates that the third time of the hard clock may cause timing error due to the under voltage, at this time, the th time of the ferroelectric is directly adopted to synchronize to the soft clock, and if the difference between the hard clock and the ferroelectric time is not large, it indicates that the third time of the hard clock is not abnormal, the third clock is directly synchronized to the soft clock.
As possible implementations of the present application, the obtaining the second time of the electric energy meter in S104 includes:
when the number of the electric energy meters connected with the power terminal is multiple, the time of each electric energy meter is obtained, the average time of the electric energy meters is calculated by utilizing the time of each electric energy meter, and the average time is taken as the second time, so that the second time is more suitable for the actual time.
Furthermore, as implementation manners of the present application, the power terminal is further communicatively connected to the master station, and after S106 or S108, the method further includes:
and S110, synchronizing the time with the master station and synchronizing the clock provided by the master station to a soft clock.
It can be understood that the time in the master station is a standard time, and as implementations of the present application, the manner of using the master station to pair the time is to periodically pair the power terminals by using the master station, and synchronize the clock provided by the master station to the soft clock.
For example, the master station 12:00:00, the time is sent to the power terminal, the power terminal synchronizes the time to the soft clock after receiving the time, and the soft clock writes the time into the iron for storage, so that the accuracy of the time is guaranteed.
It should be noted that the master station periodically sends time to the power terminals, and the power terminals synchronize the time sent by the master station to the soft clock in an overlay manner. That is, no matter the soft clock in the power terminal is synchronized by the hard clock, the ferroelectric or the electric energy meter before, when the clock provided by the master station is received, the clock provided by the master station is synchronized to the soft clock.
In other words, regardless of whether or not the time recorded by the soft clock in the power terminal is the standard time, the clocks are synchronized after the clock transmitted from the master station is received. The clock provided by the master station is a standard clock, so that the accuracy of the soft clock of the power terminal is ensured.
Second embodiment
kinds of power terminals are further provided in the embodiment of the present application, and it can be understood that the power terminals include a ferroelectric, a soft clock, a clock power source, and the like, where the power terminals can execute the clock recovery method described in .
Third embodiment
Referring to fig. 5, the present application further provides power systems 200, where the power system 200 includes a master station 220, or a plurality of power meters 230, and a power terminal 210 according to the second embodiment, where the power terminal 210 is communicatively connected to the master station 220 and the power meters 230, respectively.
In summary, the present application provides clock recovery methods, a power terminal and a power system, wherein the clock recovery methods are applied to the power terminal, the power terminal comprises a ferroelectric, a soft clock and a clock power source, and the power terminal is also in communication connection with or more power meters, when the clock power source is powered down, the ferroelectric is written into th time, when the clock power source is powered up again and the second time of the power meter is acquired, whether the absolute value of the difference between the second time and the th time is greater than a th threshold value is judged, if yes, the second time is synchronized to the soft clock, if not, the th time is synchronized to the soft clock to achieve clock recovery.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
- clock recovery method applied to a power terminal, wherein the power terminal comprises a ferroelectric and a clock power source and is also in communication connection with or more electric energy meters, the method comprises:when the clock power is down, the ferroelectric is written to th time;when the clock power supply is powered on again and the second time of the electric energy meter is obtained;judging whether the absolute value of the difference value of the second time and the th time is larger than a th threshold value;if so, synchronizing the second time to a soft clock to implement clock repairIf not, the th time is synchronized to a soft clock to enable clock recovery.
- 2. The clock recovery method of claim 1, wherein the power terminal is further communicatively coupled to a master station, and wherein after the step of synchronizing the second time to the soft clock or the th time to the soft clock, the clock recovery method further comprises:and when the clock is synchronized with the master station, synchronizing the clock provided by the master station to the soft clock.
- 3. The clock recovery method of claim 1, wherein said step of writing said ferroelectric at th time when said clock power supply is powered down comprises:periodically writing a current time in the ferroelectric;when the clock power is turned off, the time closest to the time of the clock power being turned off in the ferroelectric is taken as the th time.
- 4. The clock recovery method of claim 3, wherein the ferroelectric includes a plurality of memory spaces and each of the memory spaces includes a plurality of memory subspaces, the step of periodically writing a current time in the ferroelectric includes:periodically writing a current time within the storage subspace.
- 5. The clock recovery method of claim 1, wherein when the power terminal is communicatively connected to a plurality of power meters, the step of obtaining the second time of the power meter comprises:acquiring the time of each electric energy meter, and calculating the average time of the plurality of electric energy meters by using the time of each electric energy meter;taking the average time as the second time.
- 6. The clock recovery method of claim 1, wherein the power terminal further comprises a hard clock, the clock power supply being configured to power the hard clock; after the step when the clock power supply is powered back up, the method further comprises:judging whether the voltage of the clock power supply is stable or not;if not, executing the step of obtaining the second time of the electric energy meter;if so, synchronizing the hard clock to the soft clock.
- 7. The clock recovery method of claim 1, wherein the power terminal further comprises a hard clock, and after the step of powering back on the clock power supply, the method further comprises:judging whether a second time of acquiring the electric energy meter is obtained;if yes, executing the step of judging whether the absolute value of the difference value between the second time and the th time is larger than a th threshold value;if not, judging whether the third time of the hard clock is abnormal or not;if so, synchronizing the th time to the soft clock;if not, synchronizing the third clock to the soft clock.
- 8. The clock recovery method of claim 7, wherein the step of determining whether the third time of the hard clock is abnormal comprises:judging whether the absolute value of the difference value between the third clock and the th time is greater than a second threshold value;if so, determining that a third time of the hard clock is abnormal;if not, determining that the third time of the hard clock is normal.
- An electrical terminal of , wherein the electrical terminal is capable of performing the method of any of claims 1 to 8 to .
- 10, A power system comprising a master station, one or more power meters and a power terminal according to claim 9, the power terminal being communicatively connected to the master station and the power meters, respectively.
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| CN114815573B (en) * | 2022-05-11 | 2023-10-27 | 宁波三星医疗电气股份有限公司 | Ammeter time calibration method and device, electronic equipment and storage medium |
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