CN105589328B - Time synchronization test method, measuring accuracy determine method and device - Google Patents
Time synchronization test method, measuring accuracy determine method and device Download PDFInfo
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- CN105589328B CN105589328B CN201410569576.XA CN201410569576A CN105589328B CN 105589328 B CN105589328 B CN 105589328B CN 201410569576 A CN201410569576 A CN 201410569576A CN 105589328 B CN105589328 B CN 105589328B
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Abstract
The invention discloses a kind of time synchronization test methods, including：Before the unlocked satellite time transfer module of local clock, using satellite time transfer signal as reference signal；According to the satellite time transfer signal and measured signal, the time precision of presently described measured signal is determined.The present invention also discloses a kind of time synchronization test precision to determine method, time synchronization test device and time synchronization test precision determining device.
Description
Technical field
The present invention relates to measuring technologies more particularly to a kind of time synchronization test method, measuring accuracy to determine method and dress
It sets.
Background technology
There are demand and application in unified, the accurate time in fields such as mobile communication, electric power, finance, sensings.When ensureing
Between information accuracy, it is necessary to temporal information is tested by high-precision test system.
Traditional time synchronization test device category is more, and measuring accuracy and performance are also different.The generally use whole world
The positioning system satellite clock source (GPS, Global Positioning System) or Beidou satellite navigation system (BD) are synchronous originally
The technology of ground clock (such as crystal oscillator, rubidium clock etc.) is exported by receiving satellite-signal after taming local clock with satellite clock
Pulse signal obtains time test precision by measured signal and the comparison of output pulse signal.
But there are certain defects for this method：When measuring, satellite time transfer module completes startup and searches star and complete again first
Enter accurate time transmission pattern after itself 3D positioning, and the needs such as local clock such as rubidium clock complete preheating and wait for that own frequency reaches stable
Can just be locked to afterwards satellite time transfer module output 1PPS signals on, this locking process need about 40 minutes to 1 hour when
Between, locking time is too long.Cause instrument in use, engineering staff needs to wait until instrument always in testing location
Locking could start to measure.
Invention content
To solve existing technical problem, a kind of time synchronization test method of offer of the embodiment of the present invention, test essence
Degree determines method and device.
An embodiment of the present invention provides a kind of time synchronization test methods, including：
Before the unlocked satellite time transfer module of local clock, using satellite time transfer signal as reference signal；
According to the satellite time transfer signal and measured signal, the time precision of presently described measured signal is determined.
It is described according to the satellite time transfer signal and measured signal in said program, determine presently described measured signal
When time precision, the method further includes：
Local clock pulses and the satellite time transfer signal are subjected to phase bit comparison in real time, obtain phase deviation sequence；
According to the phase deviation sequence, the measuring accuracy of current system is determined.
It is described according to the phase deviation sequence in said program, it determines the measuring accuracy of current system, is：
Using statistical method, the frequency drift rate of the local clock is determined using the phase deviation sequence；
Using the phase deviation sequence and the frequency drift rate, determine the satellite time transfer signal and standard time it
Between the mean square deviation of error and the peak value of error peak.
In said program, the method further includes：
Preserve the frequency drift rate.
In said program, the method further includes：
Export determining measuring accuracy.
In said program, the method further includes：
After the local clock locks the satellite time transfer module, the local clock is locked and the letter after optimization processing
Number be used as reference signal；
Correspondingly, it according to the signal of the local clock locking after optimization and the measured signal, determines presently described
The time precision of measured signal.
The embodiment of the present invention additionally provides a kind of time synchronization test precision and determines method, including：
Local clock pulses and the satellite time transfer signal are subjected to phase bit comparison in real time, obtain phase deviation sequence；
According to the phase deviation sequence, the measuring accuracy of current system is determined.
It is described according to the phase deviation sequence in said program, it determines the measuring accuracy of current system, is：
Using statistical method, the frequency drift rate of the local clock is determined using the phase deviation sequence；
Using the phase deviation sequence and the frequency drift rate, determine the satellite time transfer signal and standard time it
Between the mean square deviation of error and the peak value of error peak.
In said program, the method further includes：
Preserve the frequency drift rate.
In said program, the method further includes：
Export determining measuring accuracy.
The embodiment of the present invention provides a kind of time synchronization test device again, including：Selecting unit and test cell；Its
In,
The selecting unit is used for before the unlocked satellite time transfer module of local clock, using satellite time transfer signal as base
Calibration signal；
The test cell, for according to the satellite time transfer signal and measured signal, determining presently described measured signal
Time precision.
In said program, described device further includes：Comparing unit and measuring accuracy determination unit；Wherein,
The comparing unit is obtained for local clock pulses and the satellite time transfer signal to be carried out phase bit comparison in real time
To phase deviation sequence；
The measuring accuracy determination unit, for according to the phase deviation sequence, determining the measuring accuracy of current system.
In said program, the measuring accuracy determination unit further includes：First determining module and the second determining module；Its
In,
First determining module, for using statistical method, when determining the local using the phase deviation sequence
The frequency drift rate of clock；
Second determining module is defended for utilization the phase deviation sequence and the frequency drift rate described in determination
Star time signal and the peak value of the mean square deviation of error and error peak between the standard time.
In said program, described device further includes：Storage unit, for storing the frequency drift rate.
In said program, described device further includes：Output unit, after the measuring accuracy for determining current system, output
Determining measuring accuracy.
In said program, the selecting unit, after being additionally operable to the local clock locking satellite time transfer module, by institute
The signal after local clock locking and optimization processing is stated as reference signal；
Correspondingly, the test cell is additionally operable to the signal according to the local clock locking after optimization and the quilt
Signal is surveyed, determines the time precision of presently described measured signal.
The embodiment of the present invention additionally provides a kind of time synchronization test precision determining device, including：Comparing unit and test
Precision determination unit；Wherein,
The comparing unit is obtained for local clock pulses and the satellite time transfer signal to be carried out phase bit comparison in real time
To phase deviation sequence；
The measuring accuracy determination unit, for according to the phase deviation sequence, determining the measuring accuracy of current system.
In said program, the measuring accuracy determination unit further includes：First determining module and the second determining module；Its
In,
First determining module, for using statistical method, when determining the local using the phase deviation sequence
The frequency drift rate of clock；
Second determining module is defended for utilization the phase deviation sequence and the frequency drift rate described in determination
Star time signal and the peak value of the mean square deviation of error and error peak between the standard time.
In said program, described device further includes：Storage unit, for storing the frequency drift rate.
In said program, described device further includes：Output unit, after the measuring accuracy for determining current system, output
Determining measuring accuracy.
Time synchronization test method provided in an embodiment of the present invention, measuring accuracy determine method and device, and local clock is not
Before locking satellite time service module, using satellite time transfer signal as reference signal；According to the satellite time transfer signal and tested letter
Number, the time precision of presently described measured signal is determined, in this way, test equipment can start without waiting for the locking of local clock
It is tested, substantially reduces the startup time of test, quickly can provide time precision test result for tester.
In addition, using the phase deviation sequence, after the frequency drift rate for determining the local clock, the frequency is preserved
Drift rate when test next time, can directly transfer the frequency drift rate of storage, directly determine the test essence of current system
Degree further reduced survey in this way, the quantity of the sampling phase deviation needed for estimation next time measuring accuracy can be significantly reduced
The time is tried, quickly can provide accuracy of instrument information for tester.
Description of the drawings
In attached drawing (it is not necessarily drawn to scale), similar reference numeral phase described in different views
As component.Similar reference numerals with different letter suffix can indicate the different examples of similar component.Attached drawing with example and
Unrestricted mode generally shows each embodiment discussed herein.
Fig. 1 is one time of embodiment of the present invention synchronous detecting method flow diagram；
Fig. 2 is two time synchronization test apparatus structure schematic diagram of the embodiment of the present invention；
Fig. 3 is three time synchronization test apparatus structure schematic diagram of the embodiment of the present invention；
Fig. 4 is that four time synchronization test precision of the embodiment of the present invention determines method flow schematic diagram；
Fig. 5 is five time synchronization test precision determining device structural schematic diagram of the embodiment of the present invention.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail the present invention again.
It can be seen that in existing time synchronization test system from the description of background technology, it is unlocked in local clock
Before satellite time transfer module, engineering staff needs to wait until that instrument locking could start to measure always in testing location.
In addition, traditional time synchronization test equipment cannot provide measuring accuracy range while test, tester is given
Member brings inconvenience；
In addition to this, the central processing unit (CPU, Central Processing Unit) of test equipment does not store respectively
Error amount will recalculate each error amount of adjustment, increase the testing time every time.
Based on this, in various embodiments of the present invention：Before the unlocked satellite time transfer module of local clock, by satellite
Time signal is as reference signal；According to the satellite time transfer signal and measured signal, determine presently described measured signal when
Between precision.
The present invention is described in further detail again with reference to the accompanying drawings and embodiments.
Embodiment one
The present embodiment time synchronization test method, as shown in Figure 1, including the following steps：
Step 101：Before the unlocked satellite time transfer module of local clock, using satellite time transfer signal as reference signal；
Here, the satellite time transfer signal refers to the signal of satellite time transfer module output, and the satellite time transfer signal includes：
1PPS signals and current time (TOD) signal.
When practical application, generally the satellite time transfer signal can be first filtered, by the satellite after being filtered
Time signal is as reference signal.
The local clock can be crystal oscillator or rubidium clock etc..
Step 102：According to the satellite time transfer signal and measured signal, the time essence of presently described measured signal is determined
Degree.
Here, described according to the satellite time transfer signal and measured signal, determine the time essence of presently described measured signal
When spending, this method can also include：Local clock pulses and the satellite time transfer signal are subjected to phase bit comparison in real time, obtain phase
Position biased sequence；According to the phase deviation sequence, the measuring accuracy of current system is determined.
Wherein, described according to the phase deviation sequence, determine the measuring accuracy of current system, specially：
Using statistical method, the frequency drift rate of the local clock is determined using the phase deviation sequence；
Using the phase deviation sequence and the frequency drift rate, determine the satellite time transfer signal and standard time it
Between the mean square deviation of error and the peak value of error peak.
Here, can also preserve the frequency drift rate can directly transfer the frequency drift of storage when next time tests
Rate directly determines the measuring accuracy of current system, in this way, reducing the sampling phase deviation needed for estimation next time measuring accuracy
Quantity.
After the measuring accuracy for determining current system, this method can also include：Export determining measuring accuracy；In this way, aobvious
The measuring accuracy shown is referred to for tester；Tester determines that measuring accuracy cannot be satisfied currently according to the measuring accuracy of display
It when test request, can select to wait for a period of time, after waiting measuring accuracies to meet current test request, then proceed by test.
This method can also include：
After the local clock locks the satellite time transfer module, the local clock is locked and the letter after optimization processing
Number be used as reference signal；
Correspondingly, it according to the signal of the local clock locking after optimization and the measured signal, determines presently described
The time precision of measured signal, in this way, measuring accuracy can be improved, and when losing satellite time transfer signal, can provide stability and
Timekeeping performance.
Here, when practical application, the optimization processing includes being carried out at frequency deviation correction to the local clock pulses
Reason etc..
Time synchronization test method provided in an embodiment of the present invention will before the unlocked satellite time transfer module of local clock
Satellite time transfer signal is as reference signal；According to the satellite time transfer signal and measured signal, presently described measured signal is determined
Time precision substantially reduce test in this way, test equipment can proceed by test without waiting for the locking of local clock
The startup time, quickly can provide time precision test result for tester.
According to the satellite time transfer signal and measured signal, when determining the time precision of presently described measured signal, in real time
Local clock pulses and the satellite time transfer signal are subjected to phase bit comparison, obtain phase deviation sequence；It is inclined according to the phase
Difference sequence, determines the measuring accuracy of current system, and exports determining measuring accuracy；In this way, when tester is according to display
It when measuring accuracy determines that measuring accuracy cannot be satisfied current test request, can select to wait for a period of time, wait measuring accuracies full
After the current test request of foot, then proceed by test.
Using the phase deviation sequence, after the frequency drift rate for determining the local clock, the frequency drift is preserved
Rate when test next time, can directly transfer the frequency drift rate of storage, directly determine the measuring accuracy of current system, and
Frequency drift rate is determined based on the sampled data in certain time, in this way, estimation next time measuring accuracy can be effectively reduced
The quantity of required sampling phase deviation, further reduced the testing time, quickly can provide accuracy of instrument letter for tester
Breath.
Embodiment two
Method to realize embodiment one, the present embodiment provides a kind of time synchronization test devices, as shown in Fig. 2, the dress
Set including：Selecting unit 21 and test cell 22；Wherein,
The selecting unit 21, for before the unlocked satellite time transfer module of local clock, using satellite time transfer signal as
Reference signal；
The test cell 22, for according to the satellite time transfer signal and measured signal, determining presently described tested letter
Number time precision.
Wherein, the satellite time transfer signal refers to the signal of satellite time transfer module output, and the satellite time transfer signal includes：
1PPS signals and TOD signals.
When practical application, generally the satellite time transfer signal can be first filtered, by the satellite after being filtered
Time signal is as reference signal.
The local clock can be crystal oscillator or rubidium clock etc..
The device can also include：Comparing unit and measuring accuracy determination unit；Wherein,
The comparing unit is obtained for local clock pulses and the satellite time transfer signal to be carried out phase bit comparison in real time
To phase deviation sequence；
The measuring accuracy determination unit, for according to the phase deviation sequence, determining the measuring accuracy of current system.
Here, the measuring accuracy determination unit can also include：First determining module and the second determining module；Wherein,
First determining module, for using statistical method, when determining the local using the phase deviation sequence
The frequency drift rate of clock；
Second determining module is defended for utilization the phase deviation sequence and the frequency drift rate described in determination
Star time signal and the peak value of the mean square deviation of error and error peak between the standard time.
Wherein, which can also include：Storage unit, can be straight when next time tests for storing the frequency drift rate
It connects the frequency drift rate for transferring storage, directly determines the measuring accuracy of current system, surveyed in this way, reducing estimation next time
Try the quantity of the sampling phase deviation needed for precision.
The device can also include：Output unit after the measuring accuracy for determining current system, exports determining test
Precision；In this way, the measuring accuracy of display is referred to for tester；Tester determines measuring accuracy according to the measuring accuracy of display
When cannot be satisfied current test request, it can select to wait for a period of time, after waiting measuring accuracies to meet current test request, then open
Beginning is tested.
The selecting unit 21 is additionally operable to after the local clock locks the satellite time transfer module, when will be described local
Clock locks and the signal after optimization processing is as reference signal；
Correspondingly, the test cell 22 is additionally operable to the signal and described according to the local clock locking after optimization
Measured signal determines the time precision of presently described measured signal, in this way, measuring accuracy can be improved, and is losing satellite time transfer
When signal, stability and timekeeping performance can be provided.
Here, when practical application, the optimization processing includes being carried out at frequency deviation correction to the local clock pulses
Reason etc..
When practical application, the selecting unit 21, the test cell 22, the comparing unit, the measuring accuracy are true
Order member, first determining module and second determining module can be by the central processings in time synchronization test device
Device (CPU, Central Processing Unit), digital signal processor (DSP, Digital Signal Processor)
Or programmable logic array (FPGA, Field-Programmable Gate Array) is realized；The storage unit can by when
Between memory in synchronous testing device realize；The output unit can be realized by the display in synchronous testing device.
Time synchronization test device provided in an embodiment of the present invention, before the unlocked satellite time transfer module of local clock, institute
Selecting unit 21 is stated using satellite time transfer signal as reference signal；The test cell 22 according to the satellite time transfer signal and by
Signal is surveyed, the time precision of presently described measured signal is determined, in this way, locking of the test equipment without waiting for local clock
Test is proceeded by, the startup time of test is substantially reduced, quickly can provide time precision test result for tester.
It is described when determining the time precision of presently described measured signal according to the satellite time transfer signal and measured signal
Local clock pulses and the satellite time transfer signal are carried out phase bit comparison by comparing unit in real time, obtain phase deviation sequence；Institute
Measuring accuracy determination unit is stated according to the phase deviation sequence, determines that the measuring accuracy of current system, the output unit are defeated
Go out determining measuring accuracy；In this way, when tester determines that measuring accuracy cannot be satisfied current survey according to the measuring accuracy of display
When examination requires, it can select to wait for a period of time, after waiting measuring accuracies to meet current test request, then proceed by test.
Using the phase deviation sequence, after the frequency drift rate for determining the local clock, described in storage unit preservation
Frequency drift rate when test next time, can directly transfer the frequency drift rate of storage, directly determine the test of current system
Precision, and frequency drift rate is determined based on the sampled data in certain time, is surveyed in this way, estimation next time can be effectively reduced
The quantity for trying the sampling phase deviation needed for precision, further reduced the testing time, quickly can provide instrument for tester
Precision information.
Embodiment three
When the present embodiment is practical application, time synchronization test device forms as shown in figure 3, including：Data processing unit,
Selecting unit, test cell, display unit, comparing unit, central processing unit, multiplier unit and counting unit.
With reference to Fig. 3, the processing procedure of time synchronization test device is described in detail.
When test, satellite time transfer module, which carries out starting first, searches star, and enters accurate time transmission after completing itself 3D positioning
Pattern (about 1min), the signal that data processing unit exports satellite time transfer module are filtered, output 1PPS signals and
TOD signals；At this point, the signal is divided into two-way output, signal enters test cell by selecting unit all the way, another way signal into
Enter comparison module；The signal of this two-way output is identical, and includes 1PPS signals and TOD signals；
Selecting unit is for selecting the reference signal that test system and test uses；Specifically, local clock it is unlocked it
Before, the 1PPS signals and TOD signals of the output of time service satellite modules are selected first, as the reference signal that test uses, that is, are selected
Unit is selected using satellite time transfer signal as reference signal, and is exported to test cell, test cell is by satellite time transfer signal and quilt
It surveys signal to be compared, determines the time precision of presently described measured signal, and (be equivalent in embodiment two in display unit
Output unit) provide the time precision of presently described measured signal；In this case, equipment without waiting for local clock locking and
The calculating of central processing unit can proceed by test, substantially reduce the startup time of test and can be quickly tester
The time precision information of measured signal and satellite time transfer signal is provided；
Preheating own frequency to be achieved is completed when local clock (such as crystal oscillator, rubidium clock etc.) to stablize, and is locked to satellite and is awarded
When module when, selecting unit is automatically switched to use the signal conduct after local clock locking and central processing unit optimization processing
Reference signal；When practical application, it can complete to preheat own frequency stabilization to be achieved when local clock with selecting unit, and lock
Automatically from reception under to the switching condition (for example the test instrumentation available machine time reaches preset value etc.) corresponding to satellite time transfer module
The satellite time transfer signal of processing unit output, which is switched to, receives the signal that central processing unit is exported；Correspondingly, test cell
Signal after central processing unit for processing is compared with measured signal, determines the time precision of presently described measured signal,
And provide the time precision of presently described measured signal in display unit (output unit being equivalent in embodiment two)；In this way,
Measuring accuracy can be improved, and when losing satellite time transfer signal, stability and timekeeping performance can be provided.
Wherein, the satellite time transfer signal is compared with measured signal, with the presently described measured signal of determination when
Between precision when, local clock pulses and the satellite time transfer signal are carried out phase bit comparison by comparing unit in real time, and it is inclined to obtain phase
Difference sequence；Central processing processing unit (being equivalent to the measuring accuracy determination unit in embodiment two) is according to the phase deviation sequence
Row, determine the measuring accuracy of current system.
Here, under normal running conditions, the error Normal Distribution of satellite time transfer module clock；And local clock due to
The effect of rate-adaptive pacemaker component itself and environmental factor can cause the drift of frequency, this by the old of frequency source internal components
The one direction variation of average frequency caused by changing effect, the characteristic with systematic error.Therefore, central processing unit can be estimated
The error for going out the two, to provide the peak value (peak value i.e. in following formula (3)) that reference signal waveform fluctuates peak, while basis
The accuracy for the reference signal that estimation error amendment or calibration local clock generate.
Central processing unit uses statistical method, determines that the frequency of the local clock is floated using the phase deviation sequence
Shifting rate；And utilize the phase deviation sequence and the frequency drift rate, determine the satellite time transfer signal and standard time it
Between the mean square deviation of error and the peak value of error peak.
Here, when determining the frequency drift rate to express using formula and determine the satellite time transfer signal with standard
Between between the mean square deviation of error and the peak value of error peak, then have：
Assuming that k is the frequency drift rate of local clock；piFor tiThe relative phase of frequency measured by moment；tiTo measure
At the time of relative phase, i.e. timing；Then have：
Then the frequency drift rate of local clock is obtained by formula (1) estimation：
After the frequency drift rate for estimating local clock, when estimating the satellite time transfer signal with standard using formula (2)
Between between error mean square deviation：
Wherein,X is the corresponding gate time of the sampling；
Correspondingly, using formula (3) estimate the satellite time transfer signal and between the standard time error peak peak value：
Vpp=max (pi-kx-b)-min(pi-kx-b) (3)
I=1,2 ..., n
Wherein, max () indicates that the maximum value in sampling sequence, min () indicate the minimum value in sampling sequence.
Central processing unit by the satellite time transfer signal estimated and between the standard time error mean square deviationAnd
The peak value V of error peakppIt is sent into display unit (output unit being equivalent in embodiment two) to be shown, so that tester joins
It examines.With the increase of sampling phase deviation at any time, mean square deviationAnd the peak value V of error peakppCan real-time update, if test essence
Spend estimated value (i.e.And Vpp) current test request is cannot be satisfied, tester can select to wait for a period of time, and wait test essence
After degree estimated value meets current test request, then proceed by test.
Meanwhile the frequency drift rate k of local clock that this measuring and calculation obtains can be stored in central processing unit, this
Sample when test next time, can directly transfer the frequency drift rate k of storage, directly calculateAnd Vpp, and frequency drift rate
It is to be determined based on the sampled data in certain time, in this way, the sampling phase reduced needed for estimation next time measuring accuracy is inclined
The quantity of difference, further shortens the testing time.
Wherein, multiplier unit is mainly used for determining whether the frequency that local clock and comparing unit need is different；Technology list
Member is mainly used for the frequency information based on local clock, counts to get temporal information, can be used for instrument when losing satellite source
Continue to obtain time service.
Example IV
The method that the present embodiment time synchronization test precision determines, as shown in figure 4, including the following steps：
Step 401：Local clock pulses and the satellite time transfer signal are subjected to phase bit comparison in real time, obtain phase deviation
Sequence；
Step 402：According to the phase deviation sequence, the measuring accuracy of current system is determined.
Specifically, using statistical method, the frequency drift rate of the local clock is determined using the phase deviation sequence；
Using the phase deviation sequence and the frequency drift rate, determine the satellite time transfer signal and standard time it
Between the mean square deviation of error and the peak value of error peak.
Here, can also preserve the frequency drift rate can directly transfer the frequency drift of storage when next time tests
Rate directly determines the measuring accuracy of current system, in this way, reducing the sampling phase deviation needed for estimation next time measuring accuracy
Quantity.
After the measuring accuracy for determining current system, this method can also include：Export determining measuring accuracy；In this way, aobvious
The measuring accuracy shown is referred to for tester；Tester determines that measuring accuracy cannot be satisfied currently according to the measuring accuracy of display
It when test request, can select to wait for a period of time, after waiting measuring accuracies to meet current test request, then proceed by test.
Time synchronization test precision provided in an embodiment of the present invention determines method, in real time defends local clock pulses with described
Star time signal carries out phase bit comparison, obtains phase deviation sequence；According to the phase deviation sequence, the survey of current system is determined
Precision is tried, in this way, when tester determines that measuring accuracy cannot be satisfied current test request according to the measuring accuracy of display, it can
It is waited for a period of time with selection, after waiting measuring accuracies to meet current test request, then proceeds by test.
In addition, using the phase deviation sequence, after the frequency drift rate for determining the local clock, the frequency is preserved
Drift rate when test next time, can directly transfer the frequency drift rate of storage, directly determine the test essence of current system
Degree, and frequency drift rate is determined based on the sampled data in certain time, in this way, estimation test next time can be effectively reduced
The quantity of sampling phase deviation needed for precision, further reduced the testing time, quickly can provide instrument essence for tester
Spend information.
Embodiment five
Method to realize example IV, the present embodiment provides a kind of time synchronization test precision determining devices, such as Fig. 5 institutes
Show, which includes：Comparing unit 51 and measuring accuracy determination unit 52；Wherein,
The comparing unit 51, for local clock pulses and the satellite time transfer signal to be carried out phase bit comparison in real time,
Obtain phase deviation sequence；
The measuring accuracy determination unit 52, for according to the phase deviation sequence, determining the test essence of current system
Degree.
Here, the measuring accuracy determination unit can also include：First determining module and the second determining module；Wherein,
First determining module, for using statistical method, when determining the local using the phase deviation sequence
The frequency drift rate of clock；
Second determining module is defended for utilization the phase deviation sequence and the frequency drift rate described in determination
Star time signal and the peak value of the mean square deviation of error and error peak between the standard time.
Wherein, which can also include：Storage unit, can be straight when next time tests for storing the frequency drift rate
It connects the frequency drift rate for transferring storage, directly determines the measuring accuracy of current system, surveyed in this way, reducing estimation next time
Try the quantity of the sampling phase deviation needed for precision.
The device can also include：Output unit after the measuring accuracy for determining current system, exports determining test
Precision；In this way, the measuring accuracy of display is referred to for tester；Tester determines measuring accuracy according to the measuring accuracy of display
When cannot be satisfied current test request, it can select to wait for a period of time, after waiting measuring accuracies to meet current test request, then open
Beginning is tested.
When practical application, the comparing unit, the measuring accuracy determination unit, first determining module, Yi Jisuo
Stating the second determining module can be realized by CPU, DSP or FPGA in time synchronization test precision determining device；The storage unit
It can be realized by the memory in time synchronization test precision determining device；The output unit can be determined dress by synchronism detection precision
Display in setting is realized.
Time synchronization test precision determining device provided in this embodiment, comparing unit 51 in real time by local clock pulses with
The satellite time transfer signal carries out phase bit comparison, obtains phase deviation sequence；Measuring accuracy determination unit 52 is according to the phase
Biased sequence determines the measuring accuracy of current system, in this way, when tester determines measuring accuracy according to the measuring accuracy of display
When cannot be satisfied current test request, it can select to wait for a period of time, after waiting measuring accuracies to meet current test request, then open
Beginning is tested.
In addition, using the phase deviation sequence, after the frequency drift rate for determining the local clock, storage unit preserves
The frequency drift rate when test next time, can directly transfer the frequency drift rate of storage, directly determine current system
Measuring accuracy, and frequency drift rate is determined based on the sampled data in certain time, is estimated next time in this way, can be effectively reduced
The quantity for counting the sampling phase deviation needed for measuring accuracy, further reduced the testing time, can quickly be provided for tester
Accuracy of instrument information.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the present invention
Formula.Moreover, the present invention can be used can use storage in the computer that one or more wherein includes computer usable program code
The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (12)
1. a kind of time synchronization test method, which is characterized in that the method includes：
Before the unlocked satellite time transfer module of local clock, using satellite time transfer signal as reference signal；
According to the satellite time transfer signal and measured signal, the time precision of presently described measured signal is determined；
Wherein, the method further includes：
Preheating own frequency to be achieved is completed when local clock to stablize, and is locked to the switching condition corresponding to satellite time transfer module
Under, it is switched to the signal that measuring accuracy determination unit is exported from satellite time transfer signal；
The signal exported according to measuring accuracy determination unit and measured signal determine the time essence of presently described measured signal
Degree.
2. according to the method described in claim 1, it is characterized in that, described according to the satellite time transfer signal and measured signal,
When determining the time precision of presently described measured signal, the method further includes：
Local clock pulses and the satellite time transfer signal are subjected to phase bit comparison in real time, obtain phase deviation sequence；
According to the phase deviation sequence, the measuring accuracy of current system is determined.
3. according to the method described in claim 2, it is characterized in that, described according to the phase deviation sequence, determining current system
The measuring accuracy of system is：
Using statistical method, the frequency drift rate of the local clock is determined using the phase deviation sequence；
Using the phase deviation sequence and the frequency drift rate, determines the satellite time transfer signal and missed between the standard time
The mean square deviation of difference and the peak value of error peak.
4. according to the method described in claim 3, it is characterized in that, the method further includes：
Preserve the frequency drift rate.
5. according to the method described in claim 2, it is characterized in that, the method further includes：
Export determining measuring accuracy.
6. according to the method described in claim 1, it is characterized in that, the method further includes：
After the local clock locks the satellite time transfer module, the local clock is locked and the signal after optimization processing is made
On the basis of signal；
Correspondingly, it according to the signal of the local clock locking after optimization and the measured signal, determines presently described tested
The time precision of signal.
7. a kind of time synchronization test device, which is characterized in that described device includes：Selecting unit and test cell；Wherein,
The selecting unit, for before the unlocked satellite time transfer module of local clock, believing satellite time transfer signal as benchmark
Number；It is additionally operable to complete to preheat own frequency stabilization to be achieved when local clock, and is locked to cutting corresponding to satellite time transfer module
Under the conditions of changing, the signal that measuring accuracy determination unit is exported is switched to from satellite time transfer signal；
The test cell, for according to the satellite time transfer signal and measured signal, determine presently described measured signal when
Between precision；It is additionally operable to the signal exported according to measuring accuracy determination unit and measured signal, determines presently described measured signal
Time precision.
8. device according to claim 7, which is characterized in that described device further includes：Comparing unit and measuring accuracy are true
Order member；Wherein,
The comparing unit obtains phase for local clock pulses and the satellite time transfer signal to be carried out phase bit comparison in real time
Position biased sequence；
The measuring accuracy determination unit, for according to the phase deviation sequence, determining the measuring accuracy of current system.
9. device according to claim 8, which is characterized in that the measuring accuracy determination unit further includes：First determines
Module and the second determining module；Wherein,
First determining module determines the local clock for using statistical method using the phase deviation sequence
Frequency drift rate；
Second determining module determines that the satellite is awarded for utilizing the phase deviation sequence and the frequency drift rate
When signal and standard time between the mean square deviation of error and the peak value of error peak.
10. device according to claim 9, which is characterized in that described device further includes：Storage unit, for storing
State frequency drift rate.
11. device according to claim 8, which is characterized in that described device further includes：Output unit is worked as determination
After the measuring accuracy of preceding system, determining measuring accuracy is exported.
12. device according to claim 7, which is characterized in that
The selecting unit locks the local clock after being additionally operable to the local clock locking satellite time transfer module
And the signal after optimization processing is as reference signal；
Correspondingly, the test cell is additionally operable to the signal according to the local clock locking after optimization and the tested letter
Number, determine the time precision of presently described measured signal.
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| JP2008032637A (en) * | 2006-07-31 | 2008-02-14 | Seiko Epson Corp | Time correction apparatus, timer device equipped with same, and time correction method |
| US8738312B2 (en) * | 2009-02-27 | 2014-05-27 | Furuno Electric Co., Ltd. | Phase measuring device and frequency measuring device |
| CN101834599B (en) * | 2009-03-13 | 2012-05-23 | 华东电网有限公司 | Synchronizing unit and method for synchronizing distributed wave recording devices |
| CN101692163B (en) * | 2009-09-24 | 2011-01-05 | 中国计量科学研究院 | Method and system for remotely calibrating frequency standards |
| CN201654495U (en) * | 2010-04-19 | 2010-11-24 | 普天信息技术研究院有限公司 | Satellite time transfer integrative machine |
| CN202533743U (en) * | 2012-02-16 | 2012-11-14 | 深圳市夏光通信测量技术有限公司 | Measuring basis system for time analyzer |
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