CN106330375B - Electric power cyclic waves clock synchronization system and its method for synchronizing time - Google Patents
Electric power cyclic waves clock synchronization system and its method for synchronizing time Download PDFInfo
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Abstract
The present invention relates to a kind of electric power cyclic waves clock synchronization system and its method for synchronizing time, the system includes power module, time service source, data transmission module and time service end, time service source carries out cycle shaping to electric power cyclic waves, the frequency of electric power cyclic waves is measured using temporal information and demarcates timescale data corresponding to cycle, and electric power cyclic waves frequency and corresponding timescale data composition data message are sent to time service end by data transmission module；Time service end carries out cycle shaping to electric power cyclic waves, electric power cyclic waves frequency is measured using temporal information and demarcates timescale data corresponding to cycle, is received time service source data message and is parsed, obtains the electric power cyclic waves frequency in time service source and corresponding timescale data, both are compared data, realize clock correction.The present invention is by all wave measurements and demarcation, and deviation calculates and adjusting module, and the deadline is synchronous, in same electric power cyclic waves environment, without special Time Transmission passage, realizes the time synchronized between equipment, accuracy is high, stable performance.
Description
Technical field
The invention belongs to the Time synchronization technique field under electric power cyclic waves environment, more particularly to a kind of electric power cyclic waves time is same
Step system and its method for synchronizing time.
Background technology
Existing time synchronizing method mainly has：Lock-out pulse at hard pair, such as phase node PPS, PPM, PPH；At soft pair
Serial information, such as serial ports message；During coding pair, such as IRIG-B)；Time calibration in network.Pair when interface mainly have：RS-232 serial ports is defeated
Go out, R-485 outputs, IRIG-B outputs, sectors punching output, pulse per second (PPS) output etc..Respectively there is excellent lack during pulse pair and during serial port pair
Point, the former precision is high but can not directly provide temporal information：And ratio of precision is relatively low during the latter couple, especially multiple subsystems
When, time precision is influenceed especially prominent by serial communication time delay.The advantages of both have been taken into account during B codes pair, is a kind of precision
It is very high and the temporal information containing standard pair when mode, but need proprietary transmission channel to carry out signal biography during B codes pair
It is defeated.Time calibration in network, it is divided into two kinds of time service modes of NTP time services and PTP.The advantages of NTP time service formulas：Network characteristic, pass through what is enriched
Ethernet resource, time synchronizing signal can be sent to any one corner that network be present；Network extension is convenient, cheap；It is real
It is now simple, but realize that high-class is highly difficult.The clock that PTP protocol IEEE 1588 (PTP) agreement is used for the packet switching network is same
Step system, the clock synchronization accuracy of nanosecond can be provided, highest can reach the synchronization accuracy less than 10 nanoseconds, and at present
Full accuracy Time synchronization technique based on Ethernet；But transmission channel is needed to be required for supporting PTP protocol, it is necessary to special
Time tranfer passage.
Existing Time synchronization technique method, there is certain limitation；Utilize general data transfer passage, time synchronized essence
Spend low；Set up special time tranfer passage, it is possible to achieve high precision time synchronized, cost are high.
The content of the invention
To overcome deficiency of the prior art, the present invention provides a kind of electric power cyclic waves clock synchronization system and its time synchronized
Method, it is synchronous using the electric power cyclic waves deadline, in same electric power cyclic waves environment, without special Time Transmission passage, realize
Time synchronized between equipment, accuracy is high, stable performance.
According to design provided by the present invention, a kind of electric power cyclic waves clock synchronization system, comprising power module, award
Shi Yuan, data transmission module and time service end, time service source include cycle Shaping Module, clock module, all wave measurements and demarcating module,
Data transmission blocks,
Cycle Shaping Module, cycle shaping is carried out to electric power cyclic waves by all wave shaping circuits；Clock module, it is responsible for the time
Information is generated and forwarded；All wave measurement and demarcating module, using temporal information, measure the frequency of electric power cyclic waves and demarcate cycle pair
The timescale data answered；Data transmission blocks, electric power cyclic waves frequency and corresponding timescale data composition data message are passed through into data
Transport module is sent to time service end；
Time service end includes cycle shaping unit, all wave measurements and demarcation unit, data reception module, and deviation calculates and adjustment
Module, and clock modular unit,
Clock unit is responsible for temporal information generation and correction, cycle shaping unit, by all wave shaping circuits to electric power week
Ripple carries out cycle shaping；All wave measurements and demarcation unit, using temporal information, measure electric power cyclic waves frequency and demarcate cycle correspondingly
Timescale data；Data reception module, receive time service source data message and simultaneously parse, obtain the electric power cyclic waves frequency in time service source and right
The timescale data answered；Deviation calculates and adjusting module, the electric power cyclic waves frequency that cycle shaping unit measurement is obtained and markers number
According to the electric power cyclic waves frequency obtained with data reception module and corresponding timescale data, both are compared data, compare electric power
Timescale data corresponding to all wave frequency rates, clock jitter is obtained, and clock correction is carried out to time service end.
Above-mentioned, cycle Shaping Module and cycle shaping unit, it is that electric power cyclic waves are carried out by all wave shaping circuits
Shaping, form square wave.
Above-mentioned, all wave measurement and demarcating module, continuous electric power cyclic waves frequency is measured, and the deadline marks
It is fixed, the ordered series of numbers containing electric power cyclic waves frequency and corresponding time scale information is obtained, its framing is sent to by data transmission module and awarded
Shi Duan；All wave measurements and demarcation unit, frequency measurement and time calibrating are carried out to continuous power cycle, are obtained corresponding containing electricity
Power week wave frequency rate and corresponding time scale information ordered series of numbers.
Preferably, deviation calculating and adjusting module, the electric power cyclic waves frequency received according to data reception module, with cycle
The electric power cyclic waves frequency that measurement obtains with demarcation unit measurement, carries out matching comparison, obtains the equal match bit of frequency in ordered series of numbers
K is put, according to matched position k, the timescale data for the data message that data reception module is received is single with demarcation with all wave measurements
The timescale data of member carries out mathematic interpolation, obtains time deviation, adjusts clock unit according to time deviation, makes time deviation convergence
In 0.
A kind of method for synchronizing time based on above-mentioned electric power cyclic waves clock synchronization system, is specifically comprised the following steps：
Step 1, electric power cyclic waves form square wave, all wave measurements are believed with demarcating module using clock by cycle Shaping Module
Timescale data T demarcation corresponding to breath, the continuous frequency F for measuring electric power cyclic waves and completion, composition ordered series of numbers (F, T)；
Step 2, ordered series of numbers (F, T) framing, are sent to the data reception module at time service end by data transmission module；
Step 3, cycle shaping unit, and all wave measurements and demarcation unit, equally carry out phase to continuous power cycle respectively
The cycle shaping answered, and frequency F` measurements and corresponding timescale data T` demarcation, obtain ordered series of numbers (F`, T`)；Meanwhile data receiver
The data that module parsing receives, are obtained (F, T)；
The frequency F` that the frequency F that step 4, time service end obtain reception obtains with itself measurement carries out matching and compared, and finds out
Time service end matched position, obtain frequency location k equal with data message frequency in data sequence；
Step 5, according to frequency location k, corresponding timescale data T and the time scale information T` at time service end itself are subjected to difference
Calculate, obtain time deviation △ T；
Step 6, according to time deviation △ T, adjustment time service end clock, △ T is leveled off to 0, complete time service synchronizing process.
It is above-mentioned, the matching in step 4 compare, in particular to：Receive the frequency that obtained frequency F obtains with itself measurement
F` difference meets measurement error △ f set in advance.
Beneficial effects of the present invention：
1st, time service source and time service end of the present invention carry out Time Transmission by data transmission module, pass through all wave measurements and mark
It is fixed, and deviation calculates and adjusting module, the deadline is synchronous, in same electric power cyclic waves environment, leads to without special Time Transmission
Road, the time synchronized between equipment is realized, accuracy is high, stable performance.
2nd, time service end of the present invention is by the way that the frequency measurement received is compared with itself obtained frequency values of measurement,
Corresponding time scale information mathematic interpolation is carried out, according to time scale information difference, the time service end time is calibrated, completes time service synchronizing process,
Without special data transfer passage, clock synchronization is effectively ensured, improves clock synchronization accuracy, and strong applicability, cost
It is low, it is reliable and stable.
Brief description of the drawings：
Fig. 1 is the systematic schematic diagram of the present invention；
Fig. 2 is the time service source schematic diagram of the present invention；
Fig. 3 is the time service end schematic diagram of the present invention；
Fig. 4 is the method flow schematic diagram of the present invention；
The time service source time service that Fig. 5 is the present invention handles schematic diagram；
The time service end time service that Fig. 6 is the present invention handles schematic diagram；
Fig. 7 is time service source ordered series of numbers schematic diagram in embodiment three；
Fig. 8 is time service end ordered series of numbers schematic diagram in embodiment three；
Fig. 9 is that time service source compares schematic diagram with time service end ordered series of numbers in embodiment three.
Embodiment：
The present invention is further detailed explanation with technical scheme below in conjunction with the accompanying drawings, and detailed by preferred embodiment
Describe bright embodiments of the present invention in detail, but embodiments of the present invention are not limited to this.
Embodiment one, referring to shown in Fig. 1 ~ 3, a kind of electric power cyclic waves clock synchronization system, comprising power module, time service source,
Data transmission module and time service end, time service source include cycle Shaping Module, clock module, all wave measurements and demarcating module, data
Sending module,
Cycle Shaping Module, cycle shaping is carried out to electric power cyclic waves by all wave shaping circuits；Clock module, it is responsible for the time
Information is generated and forwarded；All wave measurement and demarcating module, using temporal information, measure the frequency of electric power cyclic waves and demarcate cycle pair
The timescale data answered；Data transmission blocks, electric power cyclic waves frequency and corresponding timescale data composition data message are passed through into data
Transport module is sent to time service end；
Time service end includes cycle shaping unit, all wave measurements and demarcation unit, data reception module, and deviation calculates and adjustment
Module, and clock modular unit,
Clock unit is responsible for temporal information generation and correction, cycle shaping unit, by all wave shaping circuits to electric power week
Ripple carries out cycle shaping；All wave measurements and demarcation unit, using temporal information, measure electric power cyclic waves frequency and demarcate cycle correspondingly
Timescale data；Data reception module, receive time service source data message and simultaneously parse, obtain the electric power cyclic waves frequency in time service source and right
The timescale data answered；Deviation calculates and adjusting module, the electric power cyclic waves frequency that cycle shaping unit measurement is obtained and markers number
According to the electric power cyclic waves frequency obtained with data reception module and corresponding timescale data, both are compared data, compare electric power
Timescale data corresponding to all wave frequency rates, clock jitter is obtained, and clock correction is carried out to time service end.
Time service source carries out Time Transmission with time service end by data transmission module, passes through all wave measurements and demarcation, and deviation
Calculating and adjusting module, the deadline is synchronous, and in same electric power cyclic waves environment, without special Time Transmission passage, realization is set
Time synchronized between standby, accuracy is high, stable performance.
Embodiment two, essentially identical with embodiment one, difference is：Cycle Shaping Module and cycle shaping unit,
It is that shaping is carried out to electric power cyclic waves by all wave shaping circuits, forms square wave.
Above-mentioned, all wave measurement and demarcating module, continuous electric power cyclic waves frequency is measured, and the deadline marks
It is fixed, the ordered series of numbers containing electric power cyclic waves frequency and corresponding time scale information is obtained, its framing is sent to by data transmission module and awarded
Shi Duan；All wave measurements and demarcation unit, frequency measurement and time calibrating are carried out to continuous power cycle, are obtained corresponding containing electricity
Power week wave frequency rate and corresponding time scale information ordered series of numbers.
Preferably, deviation calculating and adjusting module, the electric power cyclic waves frequency received according to data reception module, with cycle
The electric power cyclic waves frequency that measurement obtains with demarcation unit measurement, carries out matching comparison, obtains the equal match bit of frequency in ordered series of numbers
K is put, according to matched position k, the timescale data for the data message that data reception module is received is single with demarcation with all wave measurements
The timescale data of member carries out mathematic interpolation, obtains time deviation, adjusts clock unit according to time deviation, makes time deviation convergence
In 0, time service synchronizing process is completed.
Embodiment three, referring to shown in Fig. 4 ~ 6, a kind of electric power cyclic waves clock synchronization system based on described in embodiment one when
Between synchronous method, specifically comprise the following steps：
Step 1, electric power cyclic waves form square wave, all wave measurements are believed with demarcating module using clock by cycle Shaping Module
Timescale data T demarcation corresponding to breath, the continuous frequency F for measuring electric power cyclic waves and completion, composition ordered series of numbers (F, T)；
Step 2, ordered series of numbers (F, T) framing, are sent to the data reception module at time service end by data transmission module；
Step 3, cycle shaping unit, and all wave measurements and demarcation unit, equally carry out phase to continuous power cycle respectively
The cycle shaping answered, and frequency F` measurements and corresponding timescale data T` demarcation, obtain ordered series of numbers (F`, T`)；Meanwhile data receiver
The data that module parsing receives, are obtained (F, T)；
The frequency F` that the frequency F that step 4, time service end obtain reception obtains with itself measurement carries out matching and compared, and finds out
Time service end matched position, obtain frequency location k equal with data message frequency in data sequence；
Step 5, according to frequency location k, corresponding timescale data T and the time scale information T` at time service end itself are subjected to difference
Calculate, obtain time deviation △ T；
Step 6, according to time deviation △ T, adjustment time service end clock, △ T is leveled off to 0, complete time service synchronizing process.
Matching in step 4 compare, in particular to：Receive the difference for the frequency F` that obtained frequency F obtains with itself measurement
Value meets measurement error △ f set in advance.
Time service source idiographic flow is as follows：As shown in figure 5, complete the continuous cycle frequency measurements of n, and complete to demarcate n when
Between demarcate, obtain one, contain the ordered series of numbers of all wave frequency rates and corresponding time scale information, (F, T) { F0T0, F1T1, F2T2…Fn-1Tn-1}；
N all wave frequency rates and corresponding time scale information, framing are sent to time service end by data transmission link, as shown in Figure 7.
Time service end idiographic flow is as follows：As shown in fig. 6, carrying out frequency measurement and time calibrating to continuous cycle, one is obtained
The individual ordered series of numbers containing all wave frequency rates and corresponding time scale information, (F`, T`) { F`0T`0, F`1T`1, F`2T`2…F`m-1T`m-1, such as scheme
Shown in 8；
Frequency sequence matches：The cycle frequency measurement sequence that the frequency measurement received measures with itself is entered at time service end
Row matching compares, and finds out measurement time service end matched position k, that is, finds frequency position equal with time service message frequencies in frequency sequence
Put.Because real world devices have measurement error △ f, frequency matching only requires that 0, the △ f such as approximate value is equal to measurement error
Can, frequency sequence matching, it is desirable to which the frequency values in time service message are equal with the frequency in time service end, i.e.,：
(F`k0- F0)<= △f;
(F`k+1- F1) <=△f;
(F`k+2- F2) <=△f;
……;
(F`kn-1- Fn-1) <=△f.
Frequency location k equal with time service message frequencies in frequency sequence is can determine that, as shown in Figure 9.
Deviation calculates：Matched position k is obtained, the time scale information of time service message and the machine time scale information are subjected to mathematic interpolation
（T`k+x- Tx）, obtain time deviation △ T；Time service end equipment clock is adjusted according to obtained △ T, prover time, makes △ T convergences
In 0, time service synchronizing process is completed.
Time service end of the present invention is entered by the way that the frequency measurement received is compared with the frequency values that itself measurement obtains
The corresponding time scale information mathematic interpolation of row, according to time scale information difference, the time service end time is calibrated, completes time service synchronizing process, nothing
Special data transfer passage is needed, clock synchronization is effectively ensured, improves clock synchronization accuracy, and strong applicability, cost is low,
It is reliable and stable.
The present invention is not limited to above-mentioned embodiment, and those skilled in the art can also make a variety of changes accordingly, but
It is any all to cover within the scope of the claims with equivalent or similar change of the invention.
Claims (4)
1. a kind of electric power cyclic waves clock synchronization system, comprising power module, time service source, data transmission module and time service end, it is special
Sign is：Time service source includes cycle Shaping Module, clock module, all wave measurements and demarcating module, data transmission blocks, wherein,
Cycle Shaping Module, cycle shaping is carried out to electric power cyclic waves by all wave shaping circuits；Clock module, it is responsible for temporal information generation
And forward；All wave measurement and demarcating module, using temporal information, measure the frequency of electric power cyclic waves and demarcate markers corresponding to cycle
Data；Data transmission blocks, electric power cyclic waves frequency and corresponding timescale data composition data message are passed through into data transmission module
Send to time service end；
Time service end includes cycle shaping unit, all wave measurements and demarcation unit, data reception module, and deviation calculates and adjustment mould
Block, and clock unit, wherein, clock unit is responsible for temporal information generation and correction, cycle shaping unit, passes through cycle shaping electricity
Road carries out cycle shaping to electric power cyclic waves；All wave measurements and demarcation unit, using temporal information, measure electric power cyclic waves frequency and mark
Determine timescale data corresponding to cycle；Data reception module, receive time service source data message and parse, obtain the electric power week in time service source
Wave frequency rate and corresponding timescale data；Deviation calculates and adjusting module, the electric power cyclic waves frequency that cycle shaping unit measurement is obtained
Rate and timescale data, the electric power cyclic waves frequency obtained with data reception module and corresponding timescale data, both are compared data
It is right, compare electric power cyclic waves frequency corresponding to timescale data, obtain clock jitter, and clock correction is carried out to time service end；
All wave measurement and demarcating module, continuous electric power cyclic waves frequency is measured, and the deadline is demarcated, and obtains containing electricity
Power week wave frequency rate and corresponding time scale information ordered series of numbers, its framing is sent to time service end by data transmission module；All wave measurements
With demarcating unit, frequency measurement and time calibrating are carried out to continuous power cycle, obtain containing accordingly electric power cyclic waves frequency with
The ordered series of numbers of corresponding time scale information；
Deviation calculates and adjusting module, the electric power cyclic waves frequency received according to data reception module, with all wave measurements and demarcation
The electric power cyclic waves frequency that unit measurement obtains, carries out matching comparison, obtains the equal matched position k of frequency in ordered series of numbers, according to
With position k, the timescale data for the data message that data reception module is received, the markers number with all wave measurements and demarcation unit
According to mathematic interpolation is carried out, time deviation is obtained, clock unit is adjusted according to time deviation, time deviation is leveled off to 0, completes to award
When it is synchronous.
2. electric power cyclic waves clock synchronization system according to claim 1, it is characterised in that：Cycle Shaping Module and cycle are whole
Shape unit, it is that shaping is carried out to electric power cyclic waves by all wave shaping circuits, forms square wave.
A kind of 3. method for synchronizing time of the electric power cyclic waves clock synchronization system based on described in claim 1, specifically comprising as follows
Step：
Step 1, electric power cyclic waves form square wave, all wave measurements utilize clock information with demarcating module, even by cycle Shaping Module
Continue timescale data T demarcation, composition ordered series of numbers (F, T) corresponding to the frequency F of measurement electric power cyclic waves and completion；
Step 2, ordered series of numbers (F, T) framing, are sent to the data reception module at time service end by data transmission module；
Step 3, cycle shaping unit, and all wave measurements and demarcation unit, equally continuous power cycle is carried out respectively corresponding
Cycle shaping, and frequency F` measurements and corresponding timescale data T` demarcation, obtain ordered series of numbers (F`, T`)；Meanwhile data reception module
The data received are parsed, are obtained (F, T)；
The frequency F` that the frequency F that step 4, time service end obtain reception obtains with itself measurement carries out matching and compared, and finds out time service
Matched position is held, obtains frequency location k equal with data message frequency in data sequence；
Step 5, according to frequency location k, corresponding timescale data T and the time scale information T` at time service end itself are subjected to difference meter
Calculate, obtain time deviation Δ T；
Step 6, according to time deviation Δ T, adjustment time service end clock, Δ T is leveled off to 0, complete time service synchronizing process.
4. the method for synchronizing time according to claim 3 based on electric power cyclic waves, it is characterised in that：Matching in step 4
Compare, in particular to：The difference for receiving the frequency F` that obtained frequency F obtains with itself measurement meets that measurement set in advance misses
Poor Δ f.
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| CN201127028Y (en) * | 2007-12-19 | 2008-10-01 | 华东电网有限公司 | Time synchronization system transferring time through synchronous digital hierarchy optical communications network |
| CN102098121A (en) * | 2010-12-29 | 2011-06-15 | 华为技术有限公司 | Method and device for monitoring time synchronization |
| CN102412957A (en) * | 2011-12-05 | 2012-04-11 | 上海电器科学研究院 | High-precision synchronous clock adjusting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201127028Y (en) * | 2007-12-19 | 2008-10-01 | 华东电网有限公司 | Time synchronization system transferring time through synchronous digital hierarchy optical communications network |
| CN102098121A (en) * | 2010-12-29 | 2011-06-15 | 华为技术有限公司 | Method and device for monitoring time synchronization |
| CN102412957A (en) * | 2011-12-05 | 2012-04-11 | 上海电器科学研究院 | High-precision synchronous clock adjusting method |
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