CN113271171A - Time calibration method, device and computer readable medium - Google Patents
Time calibration method, device and computer readable medium Download PDFInfo
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Abstract
The invention provides a time calibration method, a time calibration device and a computer readable medium. When the equipment is offline, performing offline timing; when the equipment is connected with the Internet again to obtain standard time, determining an error value between the offline timing value and the standard time value; and correcting the accuracy of the off-line timing through the error value. The scheme of the invention can solve the time calibration problem of the equipment in the off-line environment.
Description
Technical Field
The present invention relates to the field of measurement calibration, and in particular, to a time calibration method, apparatus, and computer readable medium.
Background
The time calibration of the device is usually performed by connecting GPS or network signals, in such a way that accurate time can be obtained and time calibration can be performed on the basis of this. However, the intelligent device may not be able to connect with the GPS or the network signal at any time or in any scene, for example, the intelligent device is used in a state where the network is poor or even no network exists for a long time, so that the time of the offline device which cannot acquire accurate time information is easily inconsistent with the actual time after the offline device is offline for a period of time.
The patent application with the application number CN106249584A provides a time synchronization method, and proposes a scheme suitable for still performing time synchronization when time synchronization cannot be completed through a normal time service system, the solution of the scheme is to perform network communication with a platform a capable of normal time service to realize time synchronization, prior art CN107809295A provides a cross-platform time synchronization device and method, and proposes a scheme for solving high-precision time unification between different motion platforms under the condition of no satellite time service signal, the solution of the scheme is still to achieve time synchronization through a mode of mutual communication among a plurality of platforms, in both the two schemes, the platforms need to have network communication function, the application scenario thereof still needs to lay network equipment offline, and the problem of time calibration of equipment under the environment cannot be solved.
Disclosure of Invention
The embodiment of the invention provides a time calibration method, a time calibration device and a computer readable medium, which can solve the problem of time calibration of equipment in an offline environment.
In a first aspect, an embodiment of the present invention provides a time calibration method, applied to a time calibration apparatus, including:
when the equipment is offline, performing offline timing;
when the equipment is connected with the Internet again to obtain standard time, determining an error value between the offline timing value and the standard time value;
and correcting the accuracy of the off-line timing through the error value.
Preferably, the first and second electrodes are formed of a metal,
the correcting the accuracy of the off-line timing by the error value comprises:
determining an offline time value through the offline timing time and the offline timing value;
determining the positive and negative of the error value, wherein when the error value is a positive value, the off-line timing value is represented to be larger than the standard time value, and when the error value is a negative value, the off-line timing value is represented to be smaller than the standard time value;
subtracting the error value from the offline timer value when the error value is a positive value;
and when the error value is a negative value, adding the error value to the offline timing value.
Preferably, the first and second electrodes are formed of a metal,
the method further comprises the following steps:
after the equipment is offline, correcting and timing the duration of the offline timing value;
correcting the accuracy of the off-line timing through the error value every time the correction timing is reached;
and after the accuracy of the offline timing is corrected, correcting and timing the duration of the offline timing value again.
Preferably, the first and second electrodes are formed of a metal,
the method further comprises the following steps:
when the equipment cannot be connected with the Internet, reminding and timing the duration of the offline timing value;
generating reminding information when the reminding time reaches the reminding time, wherein the reminding information is used for reminding a user to obtain standard time by accessing the Internet and determining a manual error value between the standard time and the current off-line timing time;
receiving a manual error value input by a user;
and correcting the accuracy of the off-line timing through the manual error value.
Preferably, the first and second electrodes are formed of a metal,
determining a standard error value calibrated before the equipment leaves a factory, wherein the standard error value comprises an average value of at least one error value obtained by offline timing of a preset number of equipment within standard time;
and when the equipment cannot be connected with the Internet of things and cannot generate the reminding information, correcting the offline timing precision through the standard error value.
In a second aspect, an embodiment of the present invention provides a time calibration apparatus based on the time calibration method in any one of the first aspect, including:
the timing module is used for performing offline timing when the equipment is offline;
the determining module is used for determining an error value between the offline timing value and the standard time value after the equipment is connected with the Internet again to obtain the standard time;
and the correction module is used for correcting the accuracy of the off-line timing through the error value.
Preferably, the first and second electrodes are formed of a metal,
the correction module is configured to: determining an offline time value through the offline timing time and the offline timing value;
determining the positive and negative of the error value, wherein when the error value is a positive value, the off-line timing value is represented to be larger than the standard time value, and when the error value is a negative value, the off-line timing value is represented to be smaller than the standard time value;
subtracting the error value from the offline timer value when the error value is a positive value;
and when the error value is a negative value, adding the error value to the offline timing value.
Preferably, the first and second electrodes are formed of a metal,
the timing module is also used for correcting and timing the duration of the offline timing value after the equipment is offline; after the off-line timing precision is corrected, correcting and timing the duration of the off-line timing value again;
and the correction module is used for correcting the accuracy of the off-line timing through the error value when the correction timing is reached.
In a third aspect, an embodiment of the present invention provides a time calibration apparatus, including: at least one memory and at least one processor;
the at least one memory to store a machine readable program;
the at least one processor is configured to invoke the machine-readable program to perform the method of any of the above first aspects.
In a fourth aspect, the present invention provides a computer-readable medium, where computer instructions are stored on the computer-readable medium, and when executed by a processor, the computer instructions cause the processor to perform the method of any one of the above first aspects.
The embodiment of the invention provides a time calibration method, a time calibration device and a computer readable medium. When the device is offline, time counting can not be performed by connecting the internet, offline timing is performed at the moment, standard time is acquired after the device is connected with the internet, an offline timing error value is obtained by comparing the standard time with offline timing time, and the accuracy of offline timing is improved by using the acquired timing error value. The method has the advantages that the accuracy of the off-line timing is higher and higher after the equipment is connected to the Internet again to obtain the standard time each time and the accuracy of the off-line timing is corrected through the error value, and the time deviation is not larger and larger due to the error of the off-line equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method for time alignment according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a time calibration apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
As mentioned above, the time calibration of the device is usually performed by connecting GPS or network signals, and in this way, accurate time can be obtained and time calibration can be performed based on the accurate time. However, the intelligent device may not be able to connect with the GPS or the network signal at any time or in any scene, for example, the intelligent device is used in a state where the network is poor or even no network exists for a long time, so that the time of the offline device which cannot acquire accurate time information is easily inconsistent with the actual time after the offline device is offline for a period of time.
The time calibration method, apparatus and computer readable medium provided by various embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present invention provides a time calibration method applied to a time calibration apparatus, the method including the following steps:
step 101: when the equipment is offline, performing offline timing;
step 102: when the equipment is connected with the Internet again to obtain standard time, determining an error value between the offline timing value and the standard time value;
step 103: and correcting the accuracy of the off-line timing through the error value.
In the embodiment of the invention, when the equipment is offline, time counting can not be carried out by connecting the Internet, offline timing is carried out at the moment, standard time is obtained after the Internet is connected, an offline timing error value is obtained by comparing the standard time with the offline timing time, and the offline timing accuracy is improved by using the obtained timing error value. The method has the advantages that the accuracy of the off-line timing is higher and higher after the equipment is connected to the Internet again to obtain the standard time each time and the accuracy of the off-line timing is corrected through the error value, and the time deviation is not larger and larger due to the error of the off-line equipment.
In an embodiment of the present invention, the correcting the accuracy of the offline timing by the error value includes:
determining an offline time value through the offline timing time and the offline timing value;
determining the positive and negative of the error value, wherein when the error value is a positive value, the off-line timing value is represented to be larger than the standard time value, and when the error value is a negative value, the off-line timing value is represented to be smaller than the standard time value;
subtracting the error value from the offline timer value when the error value is a positive value;
and when the error value is a negative value, adding the error value to the offline timing value.
Specifically, most of the existing time calibration methods are time calibration through the internet, which can obtain very accurate time data to realize time calibration, but in an off-line state, when no GPS or network signal can be connected, time counting can only be performed by the crystal oscillator, a time timing error can be caused by an error of the crystal oscillator (a conventional value: ± 1%), the timing error becomes larger and larger along with the increase of time, when the device cannot acquire standard timing time through network connection or bluetooth and the like, off-line timing is performed by the crystal oscillator, standard time is acquired after the device is connected to the network or bluetooth, the error of off-line timing is obtained by comparing the standard time with the off-line timing time, and the accuracy of off-line timing is improved by using the acquired timing error.
In an embodiment of the present invention, the method further includes:
after the equipment is offline, correcting and timing the duration of the offline timing value;
correcting the accuracy of the off-line timing through the error value every time the correction timing is reached;
and after the accuracy of the offline timing is corrected, correcting and timing the duration of the offline timing value again.
Specifically, after the device is connected to the network once, the crystal oscillator is used for local timing in an offline state, after the device is connected to the network, a timing error y1 after timing time x1 is obtained by comparing device local time x1 with network time x2, wherein | x1-x2|, then the device enters the offline state, the timing error y1 can be corrected once according to the time length of every x1, and the timing correction precision is higher and higher as the times of connecting and disconnecting the device to the network are increased.
In an embodiment of the present invention, the method further includes: when the equipment cannot be connected with the Internet, reminding and timing the duration of the offline timing value;
generating reminding information when the reminding time reaches the reminding time, wherein the reminding information is used for reminding a user to obtain standard time by accessing the Internet and determining a manual error value between the standard time and the current off-line timing time;
receiving a manual error value input by a user;
and correcting the accuracy of the off-line timing through the manual error value.
Specifically, for the device with poor environment network connection signal, no network connection or no network connection function, it may be set to actively prompt the user to correct the calibration timing time after every x1 time duration is timed, so as to obtain error values of multiple time durations, and perform correction through these error values.
In an embodiment of the present invention, the method further includes: determining a standard error value calibrated before the equipment leaves a factory, wherein the standard error value comprises an average value of at least one error value obtained by offline timing of a preset number of equipment within standard time;
and when the equipment cannot be connected with the Internet of things and cannot generate the reminding information, correcting the offline timing precision through the standard error value.
Specifically, under the condition that none of the aforementioned methods can be implemented, a method for calibrating the timing error before factory shipment may be adopted to reduce the timing error during the operation of the device, the timing errors of the clock oscillators in the same batch are basically consistent, the timing errors of a plurality of time lengths of the clock oscillators may be obtained through testing before factory shipment, and the error correction value obtained through testing is preset in the timing system.
The scheme provided by the above embodiment is explained by taking a cosmetic refrigerator as an example. The cosmetics refrigerator needs to have more time control fan operation rotational speed, and low-speed operation reduces the running noise when the user sleeps evening, and it is timed through the crystal oscillator on the control panel, carries out time synchronization through the manual time of setting up of user or wiFi bluetooth connection cell-phone.
In the first situation, a user manually sets time for time synchronization, the user is prompted to set time when the user is started for the first time, the control panel starts timing after the time is set, the user is prompted to set time again after 10 days of operation, a timing error Y1 of 10 days of operation is recorded, the control panel timing automatically corrects time Y1 every 10 days, the user is prompted to set time again after 30 days of operation, a timing error Y2 of 30 days of operation is recorded, the control panel timing automatically corrects time Y2 every 30 days, the user is prompted to set time again after 300 days of operation, a timing error Y3 of 300 days of operation is recorded, the control panel timing automatically corrects time Y3 every 300 days of operation, the control panel performs corresponding time correction after 10 days of operation, 30 days of operation and 300 days of operation, and the synchronization time can be increased all the time if higher time precision is required.
In the second case, the device can be connected with WiFi/Bluetooth, after the user is connected with the device for the first time through the WiFi/Bluetooth network, the control panel starts to time, the device works by using the timing time of the control panel after being off-line, after the device is connected with the network for the second time, the timing error W1 of the networking interval L1 is calculated twice, after the control panel is off-line, the timing error W1 is automatically corrected after the control panel is timed to be full of L1, therefore, the timing error Wn of the networking interval Ln after each off-line is calculated, after the control panel is timed to be full of Ln, the timing accuracy is higher and higher as the number of networking-off-line times is increased along with the use of the user.
In summary, in the embodiment of the present invention, the error of the offline timing time within a period of time is obtained by a specific technical means, and the accuracy of offline timing is corrected by the obtained timing error. The technical means comprises the following steps: technical means 1: standard timing time is obtained by connecting wifi/Bluetooth/GPS and the like, and an offline timing error is obtained by comparing the standard timing time with the offline timing time; technical means 2: obtaining an offline timing error by manually calibrating timing time by a user; technical means 3: and calibrating off-line timing errors before the same batch of equipment leaves a factory.
After the standard timing time is obtained by electrifying the equipment, the equipment starts off-line timing with the standard timing time, after the standard timing time is obtained again, the average error of the off-line timing time is calculated through the interval time Xn, the off-line timing time and the error value Yn of the standard timing time which are connected twice, and the new off-line timing error is calculated according to the method when the equipment obtains the new standard timing time each time.
As shown in fig. 2, an embodiment of the present invention provides a time calibration apparatus, including:
the timing module 201 is configured to perform offline timing when the device is offline;
a determining module 202, configured to determine an error value between the offline timing value and the standard time value after the device connects to the internet again to obtain the standard time;
and the correcting module 203 is configured to correct the accuracy of the offline timing according to the error value.
In an embodiment of the present invention, the modification module is configured to: determining an offline time value through the offline timing time and the offline timing value;
determining the positive and negative of the error value, wherein when the error value is a positive value, the off-line timing value is represented to be larger than the standard time value, and when the error value is a negative value, the off-line timing value is represented to be smaller than the standard time value;
subtracting the error value from the offline timer value when the error value is a positive value;
and when the error value is a negative value, adding the error value to the offline timing value.
In an embodiment of the present invention, the timing module is further configured to correct and time the duration of the offline timing value after the device is offline; after the off-line timing precision is corrected, correcting and timing the duration of the off-line timing value again;
and the correction module is used for correcting the accuracy of the off-line timing through the error value when the correction timing is reached.
It is to be understood that the illustrated structure of the embodiment of the present invention does not constitute a specific limitation to the time alignment apparatus. In other embodiments of the invention, the time alignment means may comprise more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
Because the information interaction, execution process, and other contents between the units in the device are based on the same concept as the method embodiment of the present invention, specific contents may refer to the description in the method embodiment of the present invention, and are not described herein again.
The invention is explained by taking the technical scheme adopted by the time calibration applied to the semiconductor cosmetic box as an example: the off-line timing calibration method comprises the steps of obtaining a timing error y1 after timing time x1 through a technical means, correcting the timing error y1 after timing is x1, obtaining a timing error y2 after timing time x2, correcting the timing error y2 after timing is x2, obtaining a timing error yn after timing xn, correcting the error yn after timing is xn, and determining the length of the timing xn according to the accuracy of the timing time.
Further, the technical means for obtaining the timing error yn after the timing time xn includes, but is not limited to, the following technical means: the first method is that for a network/Bluetooth device, after the device is connected to a network once, the device performs local timing by using a crystal oscillator in an offline state, after the device is connected to the network, a timing error y1 after timing time x1 is obtained by comparing device local time x1 with network time x2, | x1-x2|, then the device enters an offline state, and the timing error y1 can be corrected once according to the time length of every x1, and the correction precision of timing is higher and higher as the times of connecting the device to the network and disconnecting the network are increased; in the second method, for a device which cannot be connected to a network after leaving a factory, the user can be actively prompted to correct the calibration timing time after every x1 time length is timed, so that timing errors of a plurality of time lengths are obtained; in the third method, under the condition that the former two methods cannot be realized, the timing error in the working of the equipment can be reduced by adopting a method for calibrating the timing error before delivery, the timing errors of the clock crystal oscillators in the same batch are basically consistent, the timing errors of a plurality of time lengths can be obtained through testing before delivery, and the error correction value obtained through testing is preset in a timing system.
The present invention also provides a computer readable medium storing instructions for causing a computer to perform a time alignment method as described herein. Specifically, a system or an apparatus equipped with a storage medium on which software program codes that realize the functions of any of the above-described embodiments are stored may be provided, and a computer (or a CPU or MPU) of the system or the apparatus is caused to read out and execute the program codes stored in the storage medium.
In this case, the program code itself read from the storage medium can realize the functions of any of the above-described embodiments, and thus the program code and the storage medium storing the program code constitute a part of the present invention.
Examples of the storage medium for supplying the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (e.g., CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW), a magnetic tape, a nonvolatile memory card, and a ROM. Alternatively, the program code may be downloaded from a server computer via a communications network.
Further, it should be clear that the functions of any one of the above-described embodiments may be implemented not only by executing the program code read out by the computer, but also by causing an operating system or the like operating on the computer to perform a part or all of the actual operations based on instructions of the program code.
Further, it is to be understood that the program code read out from the storage medium is written to a memory provided in an expansion board inserted into the computer or to a memory provided in an expansion unit connected to the computer, and then causes a CPU or the like mounted on the expansion board or the expansion unit to perform part or all of the actual operations based on instructions of the program code, thereby realizing the functions of any of the above-described embodiments.
It should be noted that not all steps and modules in the above flows and system structure diagrams are necessary, and some steps or modules may be omitted according to actual needs. The execution order of the steps is not fixed and can be adjusted as required. The system structure described in the above embodiments may be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by a plurality of physical entities, or some components in a plurality of independent devices may be implemented together.
In the above embodiments, the hardware unit may be implemented mechanically or electrically. For example, a hardware element may comprise permanently dedicated circuitry or logic (such as a dedicated processor, FPGA or ASIC) to perform the corresponding operations. The hardware elements may also comprise programmable logic or circuitry, such as a general purpose processor or other programmable processor, that may be temporarily configured by software to perform the corresponding operations. The specific implementation (mechanical, or dedicated permanent, or temporarily set) may be determined based on cost and time considerations.
While the invention has been shown and described in detail in the drawings and in the preferred embodiments, the invention is not limited to the embodiments disclosed, and those skilled in the art will appreciate that various combinations of code auditing means in the various embodiments described above may be employed to obtain further embodiments of the invention, which are also within the scope of the invention.
Claims (10)
1. The time calibration method is characterized by being applied to a time calibration device and comprising the following steps:
when the equipment is offline, performing offline timing;
when the equipment is connected with the Internet again to obtain standard time, determining an error value between the offline timing value and the standard time value;
and correcting the accuracy of the off-line timing through the error value.
2. The method of claim 1,
the correcting the accuracy of the off-line timing by the error value comprises:
determining an offline time value through the offline timing time and the offline timing value;
determining the positive and negative of the error value, wherein when the error value is a positive value, the off-line timing value is represented to be larger than the standard time value, and when the error value is a negative value, the off-line timing value is represented to be smaller than the standard time value;
subtracting the error value from the offline timer value when the error value is a positive value;
and when the error value is a negative value, adding the error value to the offline timing value.
3. The method of claim 1,
further comprising:
after the equipment is offline, correcting and timing the duration of the offline timing value;
correcting the accuracy of the off-line timing through the error value every time the correction timing is reached;
and after the accuracy of the offline timing is corrected, correcting and timing the duration of the offline timing value again.
4. The method of claim 1,
further comprising:
when the equipment cannot be connected with the Internet, reminding and timing the duration of the offline timing value;
generating reminding information when the reminding time reaches the reminding time, wherein the reminding information is used for reminding a user to obtain standard time by accessing the Internet and determining a manual error value between the standard time and the current off-line timing time;
receiving a manual error value input by a user;
and correcting the accuracy of the off-line timing through the manual error value.
5. The method of claim 3,
further comprising:
determining a standard error value calibrated before the equipment leaves a factory, wherein the standard error value comprises an average value of at least one error value obtained by offline timing of a preset number of equipment within standard time;
and when the equipment cannot be connected with the Internet of things and cannot generate the reminding information, correcting the offline timing precision through the standard error value.
6. The time calibration device according to the time calibration method according to any one of claims 1 to 5, comprising:
the timing module is used for performing offline timing when the equipment is offline;
the determining module is used for determining an error value between the offline timing value and the standard time value after the equipment is connected with the Internet again to obtain the standard time;
and the correction module is used for correcting the accuracy of the off-line timing through the error value.
7. The time alignment device of claim 6,
the correction module is configured to: determining an offline time value through the offline timing time and the offline timing value;
determining the positive and negative of the error value, wherein when the error value is a positive value, the off-line timing value is represented to be larger than the standard time value, and when the error value is a negative value, the off-line timing value is represented to be smaller than the standard time value;
subtracting the error value from the offline timer value when the error value is a positive value;
and when the error value is a negative value, adding the error value to the offline timing value.
8. The time alignment device of claim,
the timing module is also used for correcting and timing the duration of the offline timing value after the equipment is offline; after the off-line timing precision is corrected, correcting and timing the duration of the off-line timing value again;
and the correction module is used for correcting the accuracy of the off-line timing through the error value when the correction timing is reached.
9. Time alignment apparatus, comprising: at least one memory and at least one processor;
the at least one memory to store a machine readable program;
the at least one processor, configured to invoke the machine readable program, to perform the method of any of claims 1 to 5.
10. Computer readable medium, characterized in that it has stored thereon computer instructions which, when executed by a processor, cause the processor to carry out the method of any one of claims 1 to 5.
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| CN107450305A (en) * | 2017-08-14 | 2017-12-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Calibration method and correction device, the smart machine of clock chip |
| CN109239640A (en) * | 2018-07-04 | 2019-01-18 | 国网浙江宁波市奉化区供电有限公司 | Ammeter clock correction method based on mean difference |
| CN111865465A (en) * | 2020-07-03 | 2020-10-30 | 火星人厨具股份有限公司 | Accurate time calibration method for Internet of things equipment |
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| CN114011044A (en) * | 2021-10-21 | 2022-02-08 | 北京渤锐体育科技发展有限公司 | Method, system, electronic equipment and storage medium for wireless timing of swimming competition |
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