CN105511256B - The online high-precise synchronization measurement of insulation and time labeling method based on main website GPS - Google Patents
The online high-precise synchronization measurement of insulation and time labeling method based on main website GPS Download PDFInfo
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- CN105511256B CN105511256B CN201510924171.8A CN201510924171A CN105511256B CN 105511256 B CN105511256 B CN 105511256B CN 201510924171 A CN201510924171 A CN 201510924171A CN 105511256 B CN105511256 B CN 105511256B
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- 238000005259 measurement Methods 0.000 title claims abstract description 16
- 238000009413 insulation Methods 0.000 title claims abstract description 12
- 238000002372 labelling Methods 0.000 title claims abstract description 11
- 238000005070 sampling Methods 0.000 claims abstract description 56
- 230000001360 synchronised effect Effects 0.000 claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000001186 cumulative effect Effects 0.000 claims abstract description 9
- 238000012935 Averaging Methods 0.000 claims abstract description 8
- 238000012937 correction Methods 0.000 claims abstract description 7
- 230000000630 rising effect Effects 0.000 claims description 24
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 210000001367 artery Anatomy 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
Classifications
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/14—Setting the time according to the time information carried or implied by the radio signal the radio signal being a telecommunication standard signal, e.g. GSM
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- Engineering & Computer Science (AREA)
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- Synchronisation In Digital Transmission Systems (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Electric Clocks (AREA)
Abstract
The present invention relates to wireless synchronization measuring system, the online high-precise synchronization measurement of specifically a kind of insulation based on main website GPS and time labeling method.The present invention solves the problems, such as existing to realize that influence and conventional GPS synchronous method that the method for Site synch does not consider that caused cumulative errors bring subsequent synchronisation work between the local clock of each substation cause the too high cost of system, power consumption increase, complicated using radio communication.The online high-precise synchronization measurement of insulation based on main website GPS is realized with time labeling method, this method using following steps：1）The composition of wireless synchronization measuring system：Wireless synchronization measuring system forms wireless synchronization measuring system using 1 main website and the structure of n substation, main website and each substation by wireless channel；2）The synchronous averaging of sampling；3）The synchronization of sampling clock；4）The demarcation and correction of local clock.The present invention is applied to wireless synchronization measuring system.
Description
Technical field
The present invention relates to wireless synchronization measuring system, the online high-precise synchronization of specifically a kind of insulation based on main website GPS
Measurement and time labeling method.
Background technology
Wireless synchronization measuring system（WSN）It is widely used in the measurement of electric insulation performance, its measuring principle is as follows：It is logical
Leakage current and busbar voltage that each substation measures medium respectively are crossed, and measurement data is pooled to by main website by wireless channel,
Then by calculating the phase difference between leakage current and busbar voltage, to assess the insulating properties of medium.Wireless synchronization measurement system
System is in real work, it is necessary to its each website（Main website and each substation）Collaborative work could obtain useful information, therefore
It is required that there is strict synchronism between its each website.In order to ensure this synchronism, the synchronous method generally used at present
It is：Gps clock, and the pps pulse per second signal for passing through gps clock are respectively mounted in the main website of wireless synchronization measuring system and each substation
To start synchro measure and carry out time mark to measurement data.However, when such a synchronous method is due to being mounted with multiple GPS
Clock, on the one hand can cause the cost of system too high and power consumption increases, and system on the other hand can be caused each gps clock information occur
Problem of management when inconsistent, thus cause the complicated of system.Also there are some to realize that website is same using radio communication at present
The method of step, but these synchronous method mostly fail to consider it is just subsynchronous after, elapse over time, during the local of each substation
The influence that caused cumulative errors are brought to subsequent synchronisation work between clock.Based on this, it is necessary to which invention is a kind of to be applied to wirelessly
The brand-new synchronous method of synchronized measurement system, caused cumulative errors were to follow-up same between both having considered the local clock of each substation
The influence that brings of step work, solving conventional wireless synchronization measuring system GPS synchronous method again causes that the cost of system is too high, power consumption
The problem of increasing, be complicated.
The content of the invention
The present invention is in order to solve existing to realize that the method for Site synch does not consider the local of each substation using radio communication
The influence and conventional GPS synchronous method that caused cumulative errors are brought to subsequent synchronisation work between clock cause system
Cost is too high, power consumption increase, it is complicated the problem of, there is provided a kind of online high-precise synchronization of insulation based on main website GPS
Measurement and time labeling method.
The present invention adopts the following technical scheme that realization：The online high-precise synchronization measurement of insulation based on main website GPS with
Time labeling method, this method are realized using following steps：
1）The composition of wireless synchronization measuring system：
For wireless synchronization measuring system using 1 main website and the structure of n substation, main website and each substation pass through wireless channel
Form wireless synchronization measuring system；Main website and each substation are respectively connected with nRF905 wireless communication modules；Main website has GPS respectively
Clock and local clock；Each substation only has local clock；Wherein, the local clock of main website by plug-in calendar clock chip and
Microsecond grade timer is formed, and local clock calendar clock and Microsecond grade timer built in FPGA of substation is formed；Main website and son
The sampling clock and mark time stood provide by local clock；
2）The synchronous averaging of sampling：
2.1）Main website sends sampling to each substation and starts request, and completes the sampling preparation of our station after transmission；
After each substation receives sampling startup request, determine whether it is that sampling starts request by resolve command；If sampling is opened
The sampling preparation of dynamic request, then each substation completion our station；
2.2）Main website is submitted using the autonomous retransmission pattern of nRF905 wireless communication modules starts sample command, is opened in order
Originate at the time of send, skip signal occurs in the DR pins of the nRF905 modules of main website connection；Main website is same using DR signal as frame
Signal is walked, and starts sampling in the rising edge of DR signal, continuous acquisition is then carried out with the sample frequency of determination, as defined in completion
Sampling number；
At the time of there is skip signal in the DR pins of nRF905 modules of main website connection, discounting for radio wave with
Each substation that light velocity transmission belt is come receives difference at the time of starting sample command, then each substation can detect simultaneously comes
Skip signal can synchronously occur from the CD pins of the wireless carrier signal of main website, and the nRF905 modules of each substation connection；Respectively
Individual substation starts sampling using CD signals as frame synchronizing signal in the rising edge of CD signals, then with the sample frequency of determination
Carry out continuous acquisition, sampling number as defined in completion；
Because there is skip signal and CD pins and skip signal occur synchronously occurring in DR pins so that main website and each
The sampling of substation is synchronous averaging；
3）The synchronization of sampling clock：
Main website sends sample frame synch command using the autonomous retransmission pattern of nRF905 wireless communication modules, and when will retransmit
Between be set to 20ms so that nRF905 modules DR pins per 20ms occur a skip signal；NRF905 modules
DR pins often there is a skip signal, main website be DR signal rising edge the frequency divider of local clock is carried out it is once clear
Zero so that the sample clock pulse forward position of main website and the rising edge alignment of DR signal；
At the time of there is skip signal due to the DR pins of the nRF905 modules connected in main website, each substation connection
Skip signal can synchronously occur in the CD pins of nRF905 modules, therefore the CD pins of the nRF905 modules of each substation connection are every
A skip signal occurs in 20ms；Often there is a skip signal in the CD pins of nRF905 modules, and each substation is believed in CD
Number rising edge the frequency divider of local clock is once reset so that the sample clock pulse forward position of each substation believe with CD
Number rising edge alignment；
Now, each substation come discounting for radio wave with light velocity transmission belt receives sample frame synch command
The difference at moment, the then rising edge of DR signal, the rising edge of CD signals, the sample clock pulse forward position of main website, each substation
Sample clock pulse forward position is alignment, so that main website and the every 20ms of the sampling clock of each substation are synchronous once, from
And reduce and elapse over time, due to cumulative errors pair caused by factor such as crystal oscillator drifts between the local clock of each substation
The influence that subsequent synchronisation work is brought, and then improve synchronization accuracy；
4）The demarcation and correction of local clock：
4.1）The GPS second pulse that main website is sent using gps clock starts the Microsecond grade timer of local clock, and profit
The next GPS second pulse sent with gps clock stops the Microsecond grade timer；Then, main website measures phase using local clock
Sprocket pulse number between adjacent two GPS second pulses, and the Microsecond grade meter of the local clock according to sprocket pulse number demarcation main website
When device sprocket pulse width；Specific calibration formula is as follows：
t0=1/N0；
In above formula：t0For the width of the sprocket pulse of the Microsecond grade timer of the local clock of main website, N0To be two neighboring
Sprocket pulse number between GPS second pulse；
After the completion of demarcation, main website utilizes the absolute moment that each sampled point of local clock precise marking occurs；
4.2）Main website measures the time between two neighboring DR signal using the Microsecond grade timer of local clock, n-th
Substation measures the sprocket pulse number between two neighboring CD signals using the Microsecond grade timer of local clock；Then, according to master
Sprocket pulse between the two neighboring CD signals that time and n-th of substation between the two neighboring DR signal that station measures measure
Number, correct the width of the sprocket pulse of the Microsecond grade timer of the local clock of n-th of substation；Specific updating formula is as follows：
tn=T2/Nn；
In above formula：tnFor the width of the sprocket pulse of the Microsecond grade timer of the local clock of n-th of substation, T2For main website
Time between the two neighboring DR signal measured, NnTiming arteries and veins between the two neighboring CD signals measured for n-th of substation
Rush number；
After the completion of correction, n-th of substation utilizes the absolute moment that each sampled point of local clock precise marking occurs.
Compared with the synchronous method of existing wireless synchronization measuring system, the insulation of the present invention based on main website GPS exists
Line high-precise synchronization measures need not install multiple gps clocks with time labeling method, and only need to be when a GPS installs in main website
Clock, and by using the synchronous averaging technology of sampling, the simultaneous techniques of sampling clock, local clock demarcation alignment technique, i.e.,
The online high-precise synchronization measurement that wireless synchronization measuring system can be achieved marks with the time, and thus it not only allows for each substation
Local clock between caused cumulative errors to the influence that brings of subsequent synchronisation work, and significantly reduce system into
This, the power consumption of system is greatly reduced, while thoroughly avoid system occur multiple gps clock information it is inconsistent when management ask
Topic, thus significantly simplify the structure of system.
The present invention efficiently solves existing realizes that the method for Site synch does not consider the sheet of each substation using radio communication
The influence and conventional GPS synchronous method that caused cumulative errors are brought to subsequent synchronisation work between ground clock cause
The cost of system is too high, power consumption increase, it is complicated the problem of, suitable for wireless synchronization measuring system.
Brief description of the drawings
Fig. 1 is the step 2 of the present invention）Schematic diagram.
Fig. 2 is the step 3 of the present invention）Schematic diagram.
Fig. 3 is the step 4 of the present invention）Schematic diagram.
Fig. 4 is the structural representation of the main website of the present invention.
Fig. 5 is the structural representation of the wireless synchronization measuring system of the present invention.
Embodiment
The online high-precise synchronization measurement of insulation and time labeling method, this method based on main website GPS are using following step
Suddenly realize：
1）The composition of wireless synchronization measuring system：
For wireless synchronization measuring system using 1 main website and the structure of n substation, main website and each substation pass through wireless channel
Form wireless synchronization measuring system；Main website and each substation are respectively connected with nRF905 wireless communication modules；Main website has GPS respectively
Clock and local clock；Each substation only has local clock；Wherein, the local clock of main website by plug-in calendar clock chip and
Microsecond grade timer is formed, and local clock calendar clock and Microsecond grade timer built in FPGA of substation is formed；Main website and son
The sampling clock and mark time stood provide by local clock；
2）The synchronous averaging of sampling：
2.1）Main website sends sampling to each substation and starts request, and completes the sampling preparation of our station after transmission；
After each substation receives sampling startup request, determine whether it is that sampling starts request by resolve command；If sampling is opened
The sampling preparation of dynamic request, then each substation completion our station；
2.2）Main website is submitted using the autonomous retransmission pattern of nRF905 wireless communication modules starts sample command, is opened in order
Originate at the time of send, skip signal occurs in the DR pins of the nRF905 modules of main website connection；Main website is same using DR signal as frame
Signal is walked, and starts sampling in the rising edge of DR signal, continuous acquisition is then carried out with the sample frequency of determination, as defined in completion
Sampling number；
At the time of there is skip signal in the DR pins of nRF905 modules of main website connection, discounting for radio wave with
Each substation that light velocity transmission belt is come receives difference at the time of starting sample command, then each substation can detect simultaneously comes
Skip signal can synchronously occur from the CD pins of the wireless carrier signal of main website, and the nRF905 modules of each substation connection；Respectively
Individual substation starts sampling using CD signals as frame synchronizing signal in the rising edge of CD signals, then with the sample frequency of determination
Carry out continuous acquisition, sampling number as defined in completion；
Because there is skip signal and CD pins and skip signal occur synchronously occurring in DR pins so that main website and each
The sampling of substation is synchronous averaging；
3）The synchronization of sampling clock：
Main website sends sample frame synch command using the autonomous retransmission pattern of nRF905 wireless communication modules, and when will retransmit
Between be set to 20ms so that nRF905 modules DR pins per 20ms occur a skip signal；NRF905 modules
DR pins often there is a skip signal, main website be DR signal rising edge the frequency divider of local clock is carried out it is once clear
Zero so that the sample clock pulse forward position of main website and the rising edge alignment of DR signal；
At the time of there is skip signal due to the DR pins of the nRF905 modules connected in main website, each substation connection
Skip signal can synchronously occur in the CD pins of nRF905 modules, therefore the CD pins of the nRF905 modules of each substation connection are every
A skip signal occurs in 20ms；Often there is a skip signal in the CD pins of nRF905 modules, and each substation is believed in CD
Number rising edge the frequency divider of local clock is once reset so that the sample clock pulse forward position of each substation believe with CD
Number rising edge alignment；
Now, each substation come discounting for radio wave with light velocity transmission belt receives sample frame synch command
The difference at moment, the then rising edge of DR signal, the rising edge of CD signals, the sample clock pulse forward position of main website, each substation
Sample clock pulse forward position is alignment, so that main website and the every 20ms of the sampling clock of each substation are synchronous once, from
And reduce and elapse over time, due to cumulative errors pair caused by factor such as crystal oscillator drifts between the local clock of each substation
The influence that subsequent synchronisation work is brought, and then improve synchronization accuracy；
4）The demarcation and correction of local clock：
4.1）The GPS second pulse that main website is sent using gps clock starts the Microsecond grade timer of local clock, and profit
The next GPS second pulse sent with gps clock stops the Microsecond grade timer；Then, main website measures phase using local clock
Sprocket pulse number between adjacent two GPS second pulses, and the Microsecond grade meter of the local clock according to sprocket pulse number demarcation main website
When device sprocket pulse width；Specific calibration formula is as follows：
t0=1/N0；
In above formula：t0For the width of the sprocket pulse of the Microsecond grade timer of the local clock of main website, N0To be two neighboring
Sprocket pulse number between GPS second pulse；
After the completion of demarcation, main website utilizes the absolute moment that each sampled point of local clock precise marking occurs；
4.2）Main website measures the time between two neighboring DR signal using the Microsecond grade timer of local clock, n-th
Substation measures the sprocket pulse number between two neighboring CD signals using the Microsecond grade timer of local clock；Then, according to master
Sprocket pulse between the two neighboring CD signals that time and n-th of substation between the two neighboring DR signal that station measures measure
Number, correct the width of the sprocket pulse of the Microsecond grade timer of the local clock of n-th of substation；Specific updating formula is as follows：
tn=T2/Nn；
In above formula：tnFor the width of the sprocket pulse of the Microsecond grade timer of the local clock of n-th of substation, T2For main website
Time between the two neighboring DR signal measured, NnTiming arteries and veins between the two neighboring CD signals measured for n-th of substation
Rush number；
After the completion of correction, n-th of substation utilizes the absolute moment that each sampled point of local clock precise marking occurs.
When it is implemented, the step 1）-4）In, the hardware configuration of main website includes FPGA, gps clock, nRF905 is wireless
Communication module；Wherein, FPGA indoor designs have SPI IP kernels and external nRF905 wireless communication modules；Gps clock directly with
FPGA pins connect；FGPA parts pin reserves hardware interconnection；The hardware configuration of substation includes FPGA, nRF905 radio communication
Module；Wherein, FPGA indoor designs have calendar clock IP kernel；FGPA parts pin reserves hardware interconnection.
Below by taking Fig. 2 as an example, to the step 3）It is specifically described：In Fig. 2：When 1st waveform is the sampling of main website
Clock signal, the frequency of the signal is 10KHz.2nd waveform is the sampled clock signal of the 1st substation, and the signal is relative to master
The deviation for the sampled clock signal stood is+10ppm（Parts per million, every million counting errors）.3rd waveform
For the sampled clock signal of n-th of substation, the signal is -10ppm relative to the deviation of the sampled clock signal of main website.4th
Waveform is the synchronous frame signal that main website is sent, and the beat of the signal is 20ms.5th waveform is the CD that the 1st substation detects
Signal, the beat of the signal is 20ms.6th waveform is the CD signals that n-th of substation detects, and the beat of the signal is
20ms.Assuming that at the t0 moment, the forward position of the sampled clock signal of main website, the 1st substation sampled clock signal forward position, n-th
The forward position of the sampled clock signal of individual substation is alignment, then at the t1 moment, the forward position of the sampled clock signal of the 1st substation,
The forward position of the sampled clock signal of n-th of substation reaches ± 1ns relative to the deviation in the forward position of the sampled clock signal of main website.Arrive
The t2 moment, the forward position of the sampled clock signal of the 1st substation, n-th substation sampled clock signal forward position relative to master
The deviation in the forward position for the sampled clock signal stood reaches ± 200ns.The t3 moment is arrived, main website sends synchronous frame signal, the 1st son
Stand, n-th of substation detects CD signals, and the frequency divider of sampling clock is zeroed out.Therefore in t3 moment, the sampling of main website
The forward position of clock signal, the forward position of sampled clock signal of the 1st substation, n-th substation sampled clock signal forward position weight
New alignment, the forward position of the sampled clock signal of the 1st substation, n-th substation sampled clock signal forward position relative to main website
Sampled clock signal forward position offset null.The t4 moment is arrived, the forward position of the sampled clock signal of the 1st substation, n-th
The forward position of the sampled clock signal of substation reaches ± 1ns again relative to the deviation in the forward position of the sampled clock signal of main website.With
This analogizes, because each substation is once reset every 20ms to the frequency divider of sampling clock so that the sampling of each substation
Clock signal is limited in 200ns all the time relative to the maximum deviation of the sampled clock signal of main website, so that each height
The sampling clock stood is synchronous with the sampling clock of main website.
Claims (2)
1. a kind of online high-precise synchronization measurement of insulation based on main website GPS and time labeling method, it is characterised in that：This method
It is to be realized using following steps：
1）Establish wireless synchronization measuring system：
Using 1 main website and the structure of n substation, main website and each substation are made up of wireless synchronization measuring system wireless channel
Wireless synchronization measuring system；Main website and each substation are respectively connected with nRF905 wireless communication modules；Main website has gps clock respectively
And local clock；Each substation only has local clock；Wherein, the local clock of main website is by plug-in calendar clock chip and microsecond
Level timer is formed, and local clock calendar clock and Microsecond grade timer built in FPGA of substation is formed；Main website and substation
Sampling clock and mark time provide by local clock；
2）The synchronous averaging of sampling：
2.1）Main website sends sampling to each substation and starts request, and completes the sampling preparation of our station after transmission；It is each
After substation receives sampling startup request, determine whether it is that sampling starts request by resolve command；Asked if sampling starts
Ask, then the sampling preparation of our station is completed in each substation；
2.2）Main website is submitted using the autonomous retransmission pattern of nRF905 wireless communication modules starts sample command, starts to send out in order
At the time of sending, skip signal occurs in the DR pins of the nRF905 modules of main website connection；Main website believes DR signal as frame synchronization
Number, and start sampling in the rising edge of DR signal, continuous acquisition is then carried out with the sample frequency of determination, completes defined sample
Points；
At the time of skip signal occur in the DR pins of the nRF905 modules of main website connection, discounting for radio wave with the light velocity
Each substation that transmission belt is come receives difference at the time of starting sample command, then each substation can detect simultaneously comes independently
The wireless carrier signal stood, and skip signal can synchronously occur in the CD pins of the nRF905 modules of each substation connection；Each height
Stand using CD signals as frame synchronizing signal, and start sampling in the rising edge of CD signals, then carried out with the sample frequency of determination
Continuous acquisition, sampling number as defined in completion；
Because there is skip signal and CD pins and skip signal occur synchronously occurring in DR pins so that main website and each substation
Sampling be synchronous averaging；
3）The synchronization of sampling clock：
Main website sends sample frame synch command using the autonomous retransmission pattern of nRF905 wireless communication modules, and by between retransmission time
Every being arranged to 20ms, so that the DR pins of nRF905 modules occur a skip signal per 20ms；The DR of nRF905 modules
Often there is a skip signal in pin, and main website is once reset in the rising edge of DR signal to the frequency divider of local clock,
So that the sample clock pulse forward position of main website and the rising edge alignment of DR signal；
At the time of there is skip signal due to the DR pins of the nRF905 modules connected in main website, the nRF905 of each substation connection
Skip signal can synchronously occur in the CD pins of module, therefore the CD pins of the nRF905 modules of each substation connection can go out per 20ms
An existing skip signal；Often there is a skip signal in the CD pins of nRF905 modules, and each substation is the rising in CD signals
Once reset along the frequency divider to local clock so that the sample clock pulse forward position of each substation and the rising of CD signals
Along alignment；
Now, at the time of each substation come discounting for radio wave with light velocity transmission belt receives sample frame synch command
Difference, then the rising edge of DR signal, the rising edge of CD signals, main website sample clock pulse forward position, each substation sampling
Clock pulses forward position is alignment, so that main website and the every 20ms of the sampling clock of each substation are synchronous once, so as to subtract
Lack and elapsed over time, because cumulative errors caused by crystal oscillator transience are to follow-up same between the local clock of each substation
The influence that step work is brought, and then improve synchronization accuracy；
4）The demarcation and correction of local clock：
4.1）The GPS second pulse that main website is sent using gps clock starts the Microsecond grade timer of local clock, and utilizes
Next GPS second pulse that gps clock is sent stops the Microsecond grade timer；Then, main website is measured adjacent using local clock
Sprocket pulse number between two GPS second pulses, and the Microsecond grade timing of the local clock according to sprocket pulse number demarcation main website
The width of the sprocket pulse of device；Specific calibration formula is as follows：
t0=1/N0；
In above formula：t0For the width of the sprocket pulse of the Microsecond grade timer of the local clock of main website, N0For two neighboring GPS second
Sprocket pulse number between pulse；
After the completion of demarcation, main website utilizes the absolute moment that each sampled point of local clock precise marking occurs；
4.2）Main website measures the time between two neighboring DR signal, n-th of substation using the Microsecond grade timer of local clock
The sprocket pulse number between two neighboring CD signals is measured using the Microsecond grade timer of local clock；Then, surveyed according to main website
Sprocket pulse number between the two neighboring CD signals that time and n-th of substation between the two neighboring DR signal obtained measure,
Correct the width of the sprocket pulse of the Microsecond grade timer of the local clock of n-th of substation；Specific updating formula is as follows：
tn=T2/Nn；
In above formula：tnFor the width of the sprocket pulse of the Microsecond grade timer of the local clock of n-th of substation, T2Measured for main website
Two neighboring DR signal between time, NnSprocket pulse number between the two neighboring CD signals measured for n-th of substation；
After the completion of correction, n-th of substation utilizes the absolute moment that each sampled point of local clock precise marking occurs.
2. the online high-precise synchronization measurement of the insulation according to claim 1 based on main website GPS and time labeling method, its
It is characterised by：The step 1）-4）In, the hardware configuration of main website includes FPGA, gps clock, nRF905 wireless communication modules；Its
In, FPGA indoor designs have SPI IP kernels and external nRF905 wireless communication modules；Gps clock is directly connected with FPGA pins；
FGPA parts pin reserves hardware interconnection；The hardware configuration of substation includes FPGA, nRF905 wireless communication module；Wherein,
FPGA indoor designs have calendar clock IP kernel；FGPA parts pin reserves hardware interconnection.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106788957B (en) * | 2016-12-30 | 2022-02-11 | 广州华多网络科技有限公司 | Method and device for correcting time error of timer |
| CN109286459B (en) * | 2017-07-21 | 2020-09-15 | 北京智云芯科技有限公司 | Time synchronization method and system |
| CN109425844B (en) * | 2017-08-30 | 2022-01-18 | 北京智云芯科技有限公司 | Calibration method and system for data sampling |
| CN111008239B (en) * | 2018-10-07 | 2023-03-24 | 上海希路智能科技有限公司 | Data synchronization method and system of asynchronous system and terminal equipment |
| CN109884877B (en) * | 2019-01-15 | 2021-09-21 | 华南理工大学 | High-precision GPS synchronous time service system and method |
| CN109921826B (en) * | 2019-03-20 | 2021-05-11 | 湖南国科微电子股份有限公司 | Pulse interference suppression method and device |
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