CN109839816A - A kind of calibration method and device of local zone time - Google Patents
A kind of calibration method and device of local zone time Download PDFInfo
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- CN109839816A CN109839816A CN201711204142.XA CN201711204142A CN109839816A CN 109839816 A CN109839816 A CN 109839816A CN 201711204142 A CN201711204142 A CN 201711204142A CN 109839816 A CN109839816 A CN 109839816A
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Abstract
The present invention provides the calibration method and device of a kind of local zone time, and method includes: the crystal oscillator number that server obtains the time service time at two time points and the server at described two time points；According to the server crystal oscillator number of the time service time at described two time points and described two time points, it is determined whether the server local time is calibrated by the time service time.The present invention does not depend on the server local time, but according to the server crystal oscillator number of the time service time at described two time points and described two time points, determine whether that the server local time is calibrated by the time service time, rather than it is fixed using local clock or time service clock, to when the server local time is artificially changed and the time service time is effective, can by the external time service time to local zone time school when (change crystal oscillator count extremely difficult), to realize the two-way stable of server clock system.
Description
Technical field
The present invention relates to computer processing technical field, in particular to the calibration method and device of a kind of local zone time.
Background technique
The train automatic monitoring system (hereinafter referred to as: the system) of urban track traffic is that a kind of the degree of automation is very high
Distributed system transmits a large amount of information as distributed system, between all parts and component, and the logic between these information is closed
System is to be closely related with timing, therefore uniform system clock is the very important component part of the system.When generating system
Clock jump, will lead to the system and is transferred to manual operation, so that the efficiency of monitoring drastically reduces.
Server local clock is a kind of source of system clock, due to presence server Crystal Oscillator Errors it is accumulative with it is artificial more
The factor for changing server local clock causes server local clock to have certain probability to jump.
It is the source of another system clock, the time using GPS/ Beidou/GLONASS position location satellite time service clock
Precision is very high.But in practical applications, satellite-signal is passed to the system by network from receiving, and have passed through a series of number
According to transmitting and variation, in this process, time service clock has certain probability to jump, if hour, date change, and
And many radio signal sources can generate interference to positioning satellite signal now, also increase the possibility of time service clock jump
Property.
Existing others guard technology working principle is when time service clock and local clock gap are larger, and system clock is only
When by local clock school, when not using time service clock school, this method has correlation when considering system clock with last time school, therefore
With certain protective capacities, but under artificially change server local clock case, time service clock also can be ineffective simultaneously,
Eventually lead to system clock jump.
Summary of the invention
The present invention provides the calibration method and device of a kind of local zone time at least partly solving above-mentioned technical problem.
In a first aspect, the present invention provides a kind of calibration method of local zone time, comprising:
Server obtains the crystal oscillator number of the time service time at two time points and the server at described two time points；
According to the server crystal oscillator number of the time service time at described two time points and described two time points, it is determined whether
The server local time is calibrated by the time service time.
Preferably, according to the server crystal oscillator number of the time service time at described two time points and described two time points,
Determine whether that the server local time is calibrated by the time service time, comprising:
Judge whether the time service time at described two time points is equal, obtains judging result；
According to the server crystal oscillator number at described two time points, the crystal oscillator count value between described two time points is calculated；
According to the time service time at described two time points, calculate the latter time point in described two time points subtract it is previous
The time service time at a time point resulting time service time difference；
According to the judging result, the crystal oscillator count value and the time service time difference, it is determined whether pass through the time service time
The server local time is calibrated.
Preferably, according to the judging result, the crystal oscillator count value and the time service time difference, it is determined whether by awarding
When the time server local time is calibrated, comprising:
It is brilliant in the server at described two time points if judging result is that the time service time at described two time points is unequal
When the server crystal oscillator number of latter time point is greater than or equal to the server crystal oscillator number of previous time point in vibration number, if the crystal oscillator
Count value and the time service time difference meet formula (one), it is determined that local zone time is calibrated by the time service time
△ t1/nps- △ t2 < Tth (one)
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and nps is crystal oscillator number per second, and Tth is dual difference
Threshold value.
Preferably, according to the judging result, the crystal oscillator count value and the time service time difference, it is determined whether by awarding
When the time server local time is calibrated, comprising:
It is brilliant in the server at described two time points if judging result is that the time service time at described two time points is unequal
When the server crystal oscillator number of latter time point is less than the server crystal oscillator number of previous time point in vibration number, if the crystal oscillator count value
Meet formula (two) with the time service time difference, it is determined that local zone time is calibrated by the time service time
(△ t1+Tmax)/nps- △ t2 < Tth (two)
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and Tmax is programmed counting maximum value, and nps is per second
Crystal oscillator number, Tth are dual difference threshold.
Preferably, according to the judging result, the crystal oscillator count value and the time service time difference, it is determined whether by awarding
When the time server local time is calibrated, comprising:
If judging result is equal for the time service time at described two time points, or brilliant in the server at described two time points
When the server crystal oscillator number of latter time point is greater than or equal to the server crystal oscillator number of previous time point in vibration number, if the crystal oscillator
Count value and the time service time difference meet formula (three), it is determined that local zone time are not calibrated by the time service time
△ t1/nps- △ t2 >=Tth (three)
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and nps is crystal oscillator number per second, and Tth is dual difference
Threshold value.
Preferably, according to the judging result, the crystal oscillator count value and the time service time difference, it is determined whether by awarding
When the time server local time is calibrated, comprising:
If judging result is equal for the time service time at described two time points, or brilliant in the server at described two time points
When the server crystal oscillator number of latter time point is less than the server crystal oscillator number of previous time point in vibration number, if the crystal oscillator count value
Meet formula (four) with the time service time difference, it is determined that local zone time is not calibrated by the time service time
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and Tmax is programmed counting maximum value, and nps is per second
Crystal oscillator number, Tth are dual difference threshold.
Preferably, the gap between described two time points is less than or equal to 5 hours.
Second aspect, the present invention also provides a kind of correction devices of local zone time, comprising:
Acquiring unit obtains the time service time at two time points and the server at described two time points for server
Crystal oscillator number；
Determination unit, for brilliant according to the time service time at described two time points and the server at described two time points
Shake number, it is determined whether the server local time is calibrated by the time service time.
Preferably, the determination unit, is also used to:
Judge whether the time service time at described two time points is equal, obtains judging result；
According to the server crystal oscillator number at described two time points, the crystal oscillator count value between described two time points is calculated；
According to the time service time at described two time points, calculate the latter time point in described two time points subtract it is previous
The time service time at a time point resulting time service time difference；
According to the judging result, the crystal oscillator count value and the time service time difference, it is determined whether pass through the time service time
The server local time is calibrated.
Preferably, the determination unit, is also used to:
It is brilliant in the server at described two time points if judging result is that the time service time at described two time points is unequal
When the server crystal oscillator number of latter time point is greater than or equal to the server crystal oscillator number of previous time point in vibration number, if the crystal oscillator
Count value and the time service time difference meet formula (one), it is determined that local zone time is calibrated by the time service time
△ t1/nps- △ t2 < Tth (one)
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and nps is crystal oscillator number per second, and Tth is dual difference
Threshold value.
As shown from the above technical solution, the present invention does not depend on the server local time, but according to described two time points
The time service time and described two time points server crystal oscillator number, it is determined whether when by the time service time to server local
Between be calibrated, rather than it is fixed use local clock or time service clock, thus artificially changed when the server local time and
When the time service time is effective, can by the external time service time to local zone time school when (change crystal oscillator count extremely difficult), thus real
The two-way stable of server clock system is showed.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the calibration method for local zone time that one embodiment of the invention provides；
Fig. 2 is a kind of functional block diagram of the correction device for local zone time that another embodiment of the present invention provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is a kind of flow chart of the calibration method for local zone time that one embodiment of the invention provides.
A kind of calibration method of local zone time as shown in Figure 1, comprising:
S101, server obtain the crystal oscillator of the time service time at two time points and the server at described two time points
Number；
In a specific embodiment, the gap between described two time points is less than or equal to 5 hours.
It is worth noting that server periodically obtains the time service time of external time service clock, the time service time is got
Period do not influence the validity of judgement, the accumulative error of crystal oscillator does not exceed dual difference threshold Tth in 5 hours because
The deviation accumulation of server crystal oscillator is monthly even more up to 15 seconds, but in a relatively short period of time (generally within 5 hours), brilliant
Vibration, which counts, can regard stable timer as.
S102, according to the time service time at described two time points and the server crystal oscillator number at described two time points, really
It is fixed whether the server local time to be calibrated by the time service time.
It is understood that obtaining server crystal oscillator number primarily to statistical server local zone time.
The present embodiment does not depend on the server local time, but according to time service time at described two time points and described
The server crystal oscillator number at two time points, it is determined whether the server local time is calibrated by the time service time, rather than
It is fixed to use local clock or time service clock, thus when the server local time is artificially changed and the time service time is effective, it can
(it is extremely difficult to change crystal oscillator counting) when by the external time service time to local zone time school, to realize server clock system
Two-way stable.
This embodiment avoids only accept and believe system time mistake caused by the time service time；Compared with other guard technologies, keep away
Time service clock caused by having exempted from because of server local clock transition fails, and human intervention is decreased, to realize " when system
When a clock clock in office failure, use another clock " intelligent school when.
System time mistake caused by the present embodiment can prevent because of artificial carelessness or the failure of other guard technologies, to subtract
Few system is transferred to the probability of manual control, while reducing the labor intensity that system clock manually protects.
This technology further strengthens the automation and intelligentification degree of the system, and has been used to practical engineering project,
Achieve expected effect.
As a kind of preferred embodiment, the step S102, comprising:
Judge whether the time service time at described two time points is equal, obtains judging result；
According to the server crystal oscillator number at described two time points, the crystal oscillator count value between described two time points is calculated；
According to the time service time at described two time points, calculate the latter time point in described two time points subtract it is previous
The time service time at a time point resulting time service time difference；
According to the judging result, the crystal oscillator count value and the time service time difference, it is determined whether pass through the time service time
The server local time is calibrated.
As a kind of preferred embodiment, according to the judging result, the crystal oscillator count value and the time service time difference, really
It is fixed whether the server local time to be calibrated by the time service time, comprising:
It is brilliant in the server at described two time points if judging result is that the time service time at described two time points is unequal
When the server crystal oscillator number of latter time point is greater than or equal to the server crystal oscillator number of previous time point in vibration number, if the crystal oscillator
Count value and the time service time difference meet formula (one), it is determined that local zone time is calibrated by the time service time
△ t1/nps- △ t2 < Tth (one)
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and nps is crystal oscillator number per second, and Tth is dual difference
Threshold value.
And since the counting of server crystal oscillator has periodicity, if more than a period, i.e. arrival programmed counting maximum value Shi Weida
To a cycle, restart to count from this, this is based on, according to the judging result, the crystal oscillator count value and the time service
Time difference, it is determined whether the server local time is calibrated by the time service time, comprising:
It is brilliant in the server at described two time points if judging result is that the time service time at described two time points is unequal
When the server crystal oscillator number of latter time point is less than the server crystal oscillator number of previous time point in vibration number, if the crystal oscillator count value
Meet formula (two) with the time service time difference, it is determined that local zone time is calibrated by the time service time
(△ t1+Tmax)/nps- △ t2 < Tth (two)
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and Tmax is programmed counting maximum value, and nps is per second
Crystal oscillator number, Tth are dual difference threshold.
Above-mentioned two embodiment illustrates that time service clock does not jump.
As a kind of preferred embodiment, according to the judging result, the crystal oscillator count value and the time service time difference, really
It is fixed whether the server local time to be calibrated by the time service time, comprising:
If judging result is equal for the time service time at described two time points, or brilliant in the server at described two time points
When the server crystal oscillator number of latter time point is greater than or equal to the server crystal oscillator number of previous time point in vibration number, if the crystal oscillator
Count value and the time service time difference meet formula (three), it is determined that local zone time are not calibrated by the time service time
△ t1/nps- △ t2 >=Tth (three)
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and nps is crystal oscillator number per second, and Tth is dual difference
Threshold value.
Alternatively, according to the judging result, the crystal oscillator count value and the time service time difference, it is determined whether pass through time service
The server local time is calibrated in time, comprising:
If judging result is equal for the time service time at described two time points, or brilliant in the server at described two time points
When the server crystal oscillator number of latter time point is less than the server crystal oscillator number of previous time point in vibration number, if the crystal oscillator count value
Meet formula (four) with the time service time difference, it is determined that local zone time is not calibrated by the time service time
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and Tmax is programmed counting maximum value, and nps is per second
Crystal oscillator number, Tth are dual difference threshold.
It is worth noting that not being calibrated i.e. local zone time using local zone time as server by the time service time
System time.
Both the above embodiment illustrates that time service clock has jump.
Fig. 2 is a kind of functional block diagram of the correction device for local zone time that another embodiment of the present invention provides.
A kind of correction device of local zone time as shown in Figure 2, comprising:
Acquiring unit 201 obtains the time service time at two time points and the clothes at described two time points for server
The crystal oscillator number of business device；
Determination unit 202, for the service according to the time service time and described two time points at described two time points
Device crystal oscillator number, it is determined whether the server local time is calibrated by the time service time.
As a kind of preferred embodiment, the determination unit 202 is also used to:
Judge whether the time service time at described two time points is equal, obtains judging result；
According to the server crystal oscillator number at described two time points, the crystal oscillator count value between described two time points is calculated；
According to the time service time at described two time points, calculate the latter time point in described two time points subtract it is previous
The time service time at a time point resulting time service time difference；
According to the judging result, the crystal oscillator count value and the time service time difference, it is determined whether pass through the time service time
The server local time is calibrated.
As a kind of preferred embodiment, the determination unit 202 is also used to:
It is brilliant in the server at described two time points if judging result is that the time service time at described two time points is unequal
When the server crystal oscillator number of latter time point is greater than or equal to the server crystal oscillator number of previous time point in vibration number, if the crystal oscillator
Count value and the time service time difference meet formula (one), it is determined that local zone time is calibrated by the time service time
△ t1/nps- △ t2 < Tth (one)
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and nps is crystal oscillator number per second, and Tth is dual difference
Threshold value.
For device embodiment, since it is basically similar to the method embodiment, related so being described relatively simple
Place illustrates referring to the part of embodiment of the method.
It should be noted that in all parts of the device of the invention, according to the function that it to be realized to therein
Component has carried out logical partitioning, and still, the present invention is not only restricted to this, can according to need all parts are repartitioned or
Person's combination for example, can be single component by some component combinations, or some components can be further broken into more
Subassembly.
Various component embodiments of the invention can be implemented in hardware, or to run on one or more processors
Software module realize, or be implemented in a combination thereof.It will be understood by those of skill in the art that can be used in practice
Microprocessor or digital signal processor (DSP) realize some or all portions in device according to an embodiment of the present invention
The some or all functions of part.The present invention is also implemented as a part or complete for executing method as described herein
The device or device program (for example, computer program and computer program product) in portion.It is such to realize program of the invention
It can store on a computer-readable medium, or may be in the form of one or more signals.Such signal can be with
It downloads from internet website, is perhaps provided on the carrier signal or is provided in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and ability
Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of several different elements and being come by means of properly programmed computer real
It is existing.In the unit claims listing several devices, several in these devices can be through the same hardware branch
To embody.The use of word first, second, and third does not indicate any sequence.These words can be explained and be run after fame
Claim.
Embodiment of above is only suitable for illustrating the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (10)
1. a kind of calibration method of local zone time characterized by comprising
Server obtains the crystal oscillator number of the time service time at two time points and the server at described two time points；
According to the server crystal oscillator number of the time service time at described two time points and described two time points, it is determined whether pass through
The server local time is calibrated in the time service time.
2. the method according to claim 1, wherein according to time service time at described two time points and described
The server crystal oscillator number at two time points, it is determined whether the server local time is calibrated by the time service time, comprising:
Judge whether the time service time at described two time points is equal, obtains judging result；
According to the server crystal oscillator number at described two time points, the crystal oscillator count value between described two time points is calculated；
According to the time service time at described two time points, when calculating that the latter time point subtracts previous in described two time points
Between time service time resulting time service time difference for putting；
According to the judging result, the crystal oscillator count value and the time service time difference, it is determined whether by the time service time to clothes
Business device local zone time is calibrated.
3. according to the method described in claim 2, it is characterized in that, according to the judging result, the crystal oscillator count value and institute
State the time service time difference, it is determined whether the server local time is calibrated by the time service time, comprising:
If judging result is that the time service time at described two time points is unequal, in the server crystal oscillator number at described two time points
When the server crystal oscillator number of middle latter time point is greater than or equal to the server crystal oscillator number of previous time point, if the crystal oscillator counts
Value and the time service time difference meet formula (one), it is determined that local zone time is calibrated by the time service time
△ t1/nps- △ t2 < Tth (one)
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and nps is crystal oscillator number per second, and Tth is dual difference threshold.
4. according to the method described in claim 2, it is characterized in that, according to the judging result, the crystal oscillator count value and institute
State the time service time difference, it is determined whether the server local time is calibrated by the time service time, comprising:
If judging result is that the time service time at described two time points is unequal, in the server crystal oscillator number at described two time points
When the server crystal oscillator number of middle latter time point is less than the server crystal oscillator number of previous time point, if the crystal oscillator count value and institute
Stating the time service time difference meets formula (two), it is determined that local zone time is calibrated by the time service time
(△ t1+Tmax)/nps- △ t2 < Tth (two)
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and Tmax is programmed counting maximum value, and nps is crystal oscillator per second
Number, Tth are dual difference threshold.
5. according to the method described in claim 2, it is characterized in that, according to the judging result, the crystal oscillator count value and institute
State the time service time difference, it is determined whether the server local time is calibrated by the time service time, comprising:
If judging result is equal for the time service time at described two time points, or in the server crystal oscillator number at described two time points
When the server crystal oscillator number of middle latter time point is greater than or equal to the server crystal oscillator number of previous time point, if the crystal oscillator counts
Value and the time service time difference meet formula (three), it is determined that local zone time are not calibrated by the time service time
△ t1/nps- △ t2 >=Tth (three)
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and nps is crystal oscillator number per second, and Tth is dual difference threshold.
6. according to the method described in claim 2, it is characterized in that, according to the judging result, the crystal oscillator count value and institute
State the time service time difference, it is determined whether the server local time is calibrated by the time service time, comprising:
If judging result is equal for the time service time at described two time points, or in the server crystal oscillator number at described two time points
When the server crystal oscillator number of middle latter time point is less than the server crystal oscillator number of previous time point, if the crystal oscillator count value and institute
Stating the time service time difference meets formula (four), it is determined that local zone time is not calibrated by the time service time
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and Tmax is programmed counting maximum value, and nps is crystal oscillator per second
Number, Tth are dual difference threshold.
7. the method according to claim 1, wherein the gap between described two time points is small less than or equal to 5
When.
8. a kind of correction device of local zone time characterized by comprising
Acquiring unit obtains the crystalline substance of the time service time at two time points and the server at described two time points for server
Shake number；
Determination unit, for according to the time service time at described two time points and the server crystal oscillator at described two time points
Number, it is determined whether the server local time is calibrated by the time service time.
9. device according to claim 8, which is characterized in that the determination unit is also used to:
Judge whether the time service time at described two time points is equal, obtains judging result；
According to the server crystal oscillator number at described two time points, the crystal oscillator count value between described two time points is calculated；
According to the time service time at described two time points, when calculating that the latter time point subtracts previous in described two time points
Between time service time resulting time service time difference for putting；
According to the judging result, the crystal oscillator count value and the time service time difference, it is determined whether by the time service time to clothes
Business device local zone time is calibrated.
10. device according to claim 9, which is characterized in that the determination unit is also used to:
If judging result is that the time service time at described two time points is unequal, in the server crystal oscillator number at described two time points
When the server crystal oscillator number of middle latter time point is greater than or equal to the server crystal oscillator number of previous time point, if the crystal oscillator counts
Value and the time service time difference meet formula (one), it is determined that local zone time is calibrated by the time service time
△ t1/nps- △ t2 < Tth (one)
Wherein, △ t1 is crystal oscillator count value, and △ t2 is the time service time difference, and nps is crystal oscillator number per second, and Tth is dual difference threshold.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0996692A (en) * | 1995-09-29 | 1997-04-08 | Matsushita Electric Ind Co Ltd | Clock |
| CN1258868A (en) * | 1998-12-08 | 2000-07-05 | 赫德森索夫特株式会社 | Watch and clock with function of raising accuracy |
| CN1729432A (en) * | 2002-12-19 | 2006-02-01 | 卡西欧计算机株式会社 | Time-data transmitting apparatus and time-correcting system |
| CN1801008A (en) * | 2004-12-30 | 2006-07-12 | 昆达电脑科技(昆山)有限公司 | Automatic time correction method for electronic device |
| CN101976038A (en) * | 2010-09-14 | 2011-02-16 | 广东美的电器股份有限公司 | Time self-calibration air conditioner and time self-calibration control method thereof |
| CN105388751A (en) * | 2015-11-26 | 2016-03-09 | 株洲南车时代电气股份有限公司 | Method and system used for preventing clock jump in motor train unit |
| CN106802836A (en) * | 2017-01-17 | 2017-06-06 | 郑州云海信息技术有限公司 | A kind of method and device of detection BMC timing accuracies |
-
2017
- 2017-11-27 CN CN201711204142.XA patent/CN109839816B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0996692A (en) * | 1995-09-29 | 1997-04-08 | Matsushita Electric Ind Co Ltd | Clock |
| CN1258868A (en) * | 1998-12-08 | 2000-07-05 | 赫德森索夫特株式会社 | Watch and clock with function of raising accuracy |
| CN1729432A (en) * | 2002-12-19 | 2006-02-01 | 卡西欧计算机株式会社 | Time-data transmitting apparatus and time-correcting system |
| CN1801008A (en) * | 2004-12-30 | 2006-07-12 | 昆达电脑科技(昆山)有限公司 | Automatic time correction method for electronic device |
| CN101976038A (en) * | 2010-09-14 | 2011-02-16 | 广东美的电器股份有限公司 | Time self-calibration air conditioner and time self-calibration control method thereof |
| CN105388751A (en) * | 2015-11-26 | 2016-03-09 | 株洲南车时代电气股份有限公司 | Method and system used for preventing clock jump in motor train unit |
| CN106802836A (en) * | 2017-01-17 | 2017-06-06 | 郑州云海信息技术有限公司 | A kind of method and device of detection BMC timing accuracies |
Non-Patent Citations (1)
| Title |
|---|
| 王圣东,等: "基于NTP 协议的一种校时实现及相关算法", 《指挥控制与仿真》 * |
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