CN105301951A - Multi-source decision realization method of time synchronization system based on analytic hierarchy method - Google Patents
Multi-source decision realization method of time synchronization system based on analytic hierarchy method Download PDFInfo
- Publication number
- CN105301951A CN105301951A CN201510631551.2A CN201510631551A CN105301951A CN 105301951 A CN105301951 A CN 105301951A CN 201510631551 A CN201510631551 A CN 201510631551A CN 105301951 A CN105301951 A CN 105301951A
- Authority
- CN
- China
- Prior art keywords
- source
- time source
- time
- big dipper
- gps
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The invention discloses a multi-source decision realization method of a time synchronization system based on an analytic hierarchy method. According to the multi-source decision realization method, validity, time quality and second pulse phases of all external Beidous, GPSs and ground time sources can be monitored in real time, two of various paths of time source information are then contrasted, in combination with initial weight, a determination matrix is established synchronously, normalization processing on the determination matrix is further carried out, actual dynamic weight of each external time source at each second is dynamically calculated, a final reference phase of a local second pulse can be further calculated, a synchronization source is determined, a participation degree of each path of time sources in a generation process of the synchronization source is reduced, selecting a present time source with time quality worse than time qualities of some or all external effective time sources can be effectively prevented, moreover, a problem of great jump of a local clock second pulse phase caused by hard time source switching can be solved.
Description
Technical field
The present invention relates to power automation technology, particularly relate to a kind of multi-source judgement implementation method of the clock synchronization system based on analytical hierarchy process.
Background technology
In electric power system dispatching end, the management of transformer substation end time synchronized all based on space-based time service, ground time service is auxiliary, define the clock synchronous system that the world is standby mutually, space-based time service adopt based on big-dipper satellite pair time, GPS (GPS) pair time be auxiliary one-way timing mode, ground time service adopt keep time based on local clock, communication system Synchronization Network resource mode when being auxiliary pair.The funtion part of the clock synchronization system of electric system is primarily of receiving element, clock unit and output unit three part composition, after receiving element receives external time reference signal, clock unit makes synchronisation source according to the external time reference signal that source state justify of many times is optimum with selecting mechanism selection, clock is drawn into tracking lock state, and compensate transmission delay, master/backup clock device is responsible for receiving multichannel time signal, coordinate punctual module, the selection realizing signal switches, and coding becomes multiple electric power synchronous coding, export eventually through various electric driving interface.The time synchronism apparatus of electric system has many time services source redundancy, high timekeeping performance, and the feature of power supply redundancy.
But, current great majority all adopt the many time sources system of selection based on pre-set priority to realize the time service of many time sources at the clock synchronization system of fortune electric system, clock synchronization system detects the validity of all external times source signal in real time, then select priority the highest effective external time source as the synchronisation source of local clock, when current sync source signal lost efficacy, then select from remaining effective external time source priority the highest as new synchronisation source; When a time source is effective from failure recovery, if during the priority of its priority higher than current sync source, be then set to current sync source.At this moment, clock by the control of external time reference signal, and exports the time synchronizing signal synchronous with it and temporal information.Many time sources changing method of this traditional pre-set priority belongs to rigidity and switches, the temporal quality in the current time source likely selected is poor or the poorest in source of all effective external times, and is difficult to the strategy of tracing to the source realizing " Big Dipper preferential, GPS be auxiliary ".
Therefore, need a kind of new technical scheme to solve the problems of the technologies described above.
Summary of the invention
The present invention seeks to for the deficiencies in the prior art, a kind of multi-source judgement implementation method of the clock synchronization system based on analytical hierarchy process is provided, solves the rigid switching of time source and cause local clock pulse per second (PPS) phase place to occur the problem of significantly saltus step; The temporal quality that effectively prevent the current time source of selection is the generation of situation poor or the poorest in source of all effective external times.
In order to realize object of the present invention, the present invention proposes a kind of multi-source judgement implementation method of the clock synchronization system based on analytical hierarchy process, the method comprises the following steps:
The first step, receive the Big Dipper, gps time source and ground elapsed time source;
Second step, carries out message reception to the Big Dipper, gps time source, resolves; The B code of ground time source is received, decoded;
3rd step, judges the Big Dipper, gps time source messages validity, judge heading whether correctly, whether have error code, whether meet message rule, as correctly, enter into next step, as exception, turn back to second step; Ground time source validity is judged, judges that check code is no correctly, whether meet a yard source rule, as correctly, enter into next step, as exception, turn back to second step;
4th step, to the Big Dipper, gps time source and ground elapsed time source time quality correctness judge, judge the Big Dipper, whether a satellite number in gps time source meet the requirement that a satellite number is more than or equal to 4, as met, entering into next step, as do not met, turning back to second step; Judge that whether the Big Dipper, gps time source and source ground elapsed time, Hour Minute Second date be continuous, as met, entering into next step, as do not met, turning back to second step;
5th step, to the Big Dipper, gps time source and ground elapsed time source the phase place validity of pulse per second (PPS) judge, the phase error of time source pulse per second (PPS) is calculated, when phase error is greater than prespecified threshold values N, think the Big Dipper, gps time source and ground elapsed time source pulse per second (PPS) phase place confidence level be 0, it is invalid to be judged as, turns back to second step, as effectively, enter into next step;
6th step, filtering process is carried out to pulse per second (PPS) phase place, according to the Big Dipper, gps time source and ground elapsed time source validity, the phase information of the Big Dipper, gps time source and ground elapsed time source pulse per second (PPS) is compared between two, in conjunction with initial weight, set up corresponding judgment matrix
wherein,
p
i, p
jfor initial weight,
for phase differential, preset when i=1 interval scale Big Dipper time source status information, when i=2 interval scale gps time source status information, when i=3 interval scale ground elapsed time source status information, preset initial weight P
1=5, P
2=3, P
3=1;
7th step, calculate the Big Dipper in judgment matrix, gps time source and ground elapsed time source geometric mean
recycling normalization formula
judgment matrix is normalized, dynamic calculation go out each second Big Dipper, gps time source and ground elapsed time source actual changeable weight;
8th step, according to the Big Dipper, gps time source and ground elapsed time source changeable weight carry out COMPREHENSIVE CALCULATING, draw the final synchronisation source fixed phase of local pulse per second (PPS).
Further, in the 5th step, described threshold values N=5us.
Further, the described reception Big Dipper, gps time source is wireless time signal adopts independently Big Dipper module, GPS module or adopt the tightly coupled Big Dipper module of bimodulus, GPS module; The wired time signal in described reception ground elapsed time source adopts multimode optical fiber to carry out the input of light B code.
Further, described clock synchronization system comprises receiving element, clock unit and output unit, described receiving element receives wireless time reference signal as external time reference by Big Dipper module, GPS module, receive wired time reference signal as external time reference by B code module, after resolving and decoding, obtain the input of external timing signal as clock unit; The external timing signal that described clock unit is responsible for receiving element receives carries out multi-source judgement, generate dynamic priority, again COMPREHENSIVE CALCULATING is carried out to outside time reference signal, determine synchronisation source phase place, carry out clock source and switch control, whether synchronously determine local clock to draw still to keep time into tracking lock state according to clock, if the Big Dipper of outside, gps time source and ground elapsed time source all lost efficacy, ensure that clock synchronization system enters punctual state by high-performance crystal oscillator; Described output unit is responsible for the time synchronized coding converted to by frequency information basic time of clock inside needed for engineering system.
The multi-source judgement implementation method of the clock synchronization system based on analytical hierarchy process of the present invention, the beneficial effect reached:
1, the strategy of tracing to the source of country's " space-based time service is main; ground time service is auxiliary; space-based time service is based on the Big Dipper; GPS is auxiliary " is strictly followed, specify that the weight of any moment Big Dipper time source time service must be greater than the weight of gps time source time service, the weight of space-based time service must be greater than the weight of ground time service, reduces the participation of each road time source in synchronisation source generative process.
2, solving the rigid switching of clock synchronization system time source causes local clock pulse per second (PPS) phase place to occur the problem of significantly saltus step, and the temporal quality avoiding the current time source that clock synchronization system is selected is the generation of situation poor or the poorest in source of all effective external times.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the multi-source judgement of the time synchronized management system based on analytical hierarchy process of the present invention;
Fig. 2 is the basic composition figure of clock synchronization system of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, following embodiment should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
Refer to shown in Fig. 1, the present invention proposes a kind of multi-source judgement implementation method of the clock synchronization system based on analytical hierarchy process, the method comprises the following steps:
The first step, receive the Big Dipper, gps time source and ground elapsed time source;
Second step, carries out message reception to the Big Dipper, gps time source, resolves; The B code of ground time source is received, decoded;
3rd step, judges the Big Dipper, gps time source messages validity, judge heading whether correctly, whether have error code, whether meet message rule, as correctly, enter into next step, as exception, turn back to second step; Ground time source validity is judged, judges that check code is no correctly, whether meet a yard source rule, as correctly, enter into next step, as exception, turn back to second step;
4th step, to the Big Dipper, gps time source and ground elapsed time source time quality correctness judge, judge the Big Dipper, whether a satellite number in gps time source meet the requirement that a satellite number is more than or equal to 4, as met, entering into next step, as do not met, turning back to second step; Judge that whether the Big Dipper, gps time source and source ground elapsed time, Hour Minute Second date be continuous, as met, entering into next step, as do not met, turning back to second step;
5th step, to the Big Dipper, gps time source and ground elapsed time source the phase place validity of pulse per second (PPS) judge, the phase error of time source pulse per second (PPS) is calculated, when phase error is greater than prespecified threshold values N, preferably, N=5us, think the Big Dipper, gps time source and ground elapsed time source pulse per second (PPS) phase place confidence level be 0, it is invalid to be judged as, turns back to second step, as effectively, enter into next step;
6th step, filtering process is carried out to pulse per second (PPS) phase place, according to the Big Dipper, gps time source and ground elapsed time source validity, the phase information of the Big Dipper, gps time source and ground elapsed time source pulse per second (PPS) is compared between two, in conjunction with initial weight, set up corresponding judgment matrix
wherein,
p
i, p
jfor initial weight,
for phase differential, preset when i=1 interval scale Big Dipper time source status information, when i=2 interval scale gps time source status information, when i=3 interval scale ground elapsed time source status information, preset initial weight P
1=5, P
2=3, P
3=1;
7th step, calculate the Big Dipper in judgment matrix, gps time source and ground elapsed time source geometric mean
recycling normalization formula
judgment matrix is normalized, dynamic calculation go out each second Big Dipper, gps time source and ground elapsed time source actual changeable weight;
8th step, according to the Big Dipper, gps time source and ground elapsed time source changeable weight carry out COMPREHENSIVE CALCULATING, draw the final synchronisation source fixed phase of local pulse per second (PPS).
Wherein, receive the Big Dipper, gps time source is wireless, and time signal adopts use independently Big Dipper module, GPS module or the tightly coupled Big Dipper module of employing bimodulus, GPS module; Receiving the wired time signal in ground elapsed time source adopts multimode optical fiber to carry out the input of light B code.
The multi-source judgement implementation method of the clock synchronization system based on analytical hierarchy process of the present invention, can the validity in Real-Time Monitoring source of all external times, temporal quality and pulse per second (PPS) phase place, subsequently each road time source information is compared between two, in conjunction with initial weight, synchronously set up judgment matrix, again judgment matrix is normalized, dynamic calculation goes out the actual changeable weight in each second each external time source, calculate the final reference phase place of local pulse per second (PPS) more further, determine synchronisation source, reduce the participation of each road time source in synchronisation source generative process, the temporal quality that effectively prevent the current time source of selection is the generation of situation poor or the poorest in source of all effective external times, solve the rigid switching of time source causes local clock pulse per second (PPS) phase place to occur the problem of significantly saltus step simultaneously.
Refer to shown in Fig. 2, accordingly, this multi-source based on the clock synchronization system of analytical hierarchy process is utilized to adjudicate the clock synchronization system of implementation method, this system comprises receiving element, clock unit and output unit, receiving element receives wireless time reference signal as external time reference by Big Dipper module, GPS module, receive wired time reference signal as external time reference by B code module, after resolving and decoding, obtain the input of external timing signal as clock unit; The external timing signal that clock unit is responsible for receiving element receives carries out multi-source judgement, generate dynamic priority, again COMPREHENSIVE CALCULATING is carried out to outside time reference signal, determine synchronisation source phase place, carry out clock source and switch control, whether synchronously determine local clock to draw still to keep time into tracking lock state according to clock, if the Big Dipper of outside, gps time source and ground elapsed time source all lost efficacy, ensure that clock synchronization system enters punctual state by high-performance crystal oscillator; Output unit is responsible for the time synchronized coding converted to by frequency information basic time of clock inside needed for engineering system.
Claims (4)
1., based on a multi-source judgement implementation method for the clock synchronization system of analytical hierarchy process, it is characterized in that: comprise the following steps:
The first step, receive the Big Dipper, gps time source and ground elapsed time source;
Second step, carries out message reception to the Big Dipper, gps time source, resolves; The B code of ground time source is received, decoded;
3rd step, judges the Big Dipper, gps time source messages validity, judge heading whether correctly, whether have error code, whether meet message rule, as correctly, enter into next step, as exception, turn back to second step; Ground time source validity is judged, judges that check code is no correctly, whether meet a yard source rule, as correctly, enter into next step, as exception, turn back to second step;
4th step, to the Big Dipper, gps time source and ground elapsed time source time quality correctness judge, judge the Big Dipper, whether a satellite number in gps time source meet the requirement that a satellite number is more than or equal to 4, as met, entering into next step, as do not met, turning back to second step; Judge that whether the Big Dipper, gps time source and source ground elapsed time, Hour Minute Second date be continuous, as met, entering into next step, as do not met, turning back to second step;
5th step, to the Big Dipper, gps time source and ground elapsed time source the phase place validity of pulse per second (PPS) judge, the phase error of time source pulse per second (PPS) is calculated, when phase error is greater than prespecified threshold values N, think the Big Dipper, gps time source and ground elapsed time source pulse per second (PPS) phase place confidence level be 0, it is invalid to be judged as, turns back to second step, as effectively, enter into next step;
6th step, filtering process is carried out to pulse per second (PPS) phase place, according to the Big Dipper, gps time source and ground elapsed time source validity, the phase information of the Big Dipper, gps time source and ground elapsed time source pulse per second (PPS) is compared between two, in conjunction with initial weight, set up corresponding judgment matrix
wherein,
p
i, p
jfor initial weight,
for phase differential, preset when i=1 interval scale Big Dipper time source status information, when i=2 interval scale gps time source status information, when i=3 interval scale ground elapsed time source status information, preset initial weight P
1=5, P
2=3, P
3=1;
7th step, calculate the Big Dipper in judgment matrix, gps time source and ground elapsed time source geometric mean
recycling normalization formula
judgment matrix is normalized, dynamic calculation go out each second Big Dipper, gps time source and ground elapsed time source actual changeable weight;
8th step, according to the Big Dipper, gps time source and ground elapsed time source changeable weight carry out COMPREHENSIVE CALCULATING, draw the final synchronisation source fixed phase of local pulse per second (PPS).
2., as claimed in claim 1 based on the multi-source judgement implementation method of the clock synchronization system of analytical hierarchy process, it is characterized in that: in the 5th step, described threshold values N=5us.
3. as claimed in claim 1 based on the multi-source judgement implementation method of the clock synchronization system of analytical hierarchy process, it is characterized in that: the described reception Big Dipper, gps time source is wireless time signal adopts independently Big Dipper module, GPS module or adopt the tightly coupled Big Dipper module of bimodulus, GPS module; The wired time signal in described reception ground elapsed time source adopts multimode optical fiber to carry out the input of light B code.
4., as claimed in claim 1 based on the multi-source judgement implementation method of the clock synchronization system of analytical hierarchy process, it is characterized in that: this clock synchronization system comprises receiving element, clock unit and output unit,
Described receiving element receives wireless time reference signal as external time reference by Big Dipper module, GPS module, receive wired time reference signal as external time reference by B code module, after resolving and decoding, obtain the input of external timing signal as clock unit;
The external timing signal that described clock unit is responsible for receiving element receives carries out multi-source judgement, generate dynamic priority, again COMPREHENSIVE CALCULATING is carried out to outside time reference signal, determine synchronisation source phase place, carry out clock source and switch control, whether synchronously determine local clock to draw still to keep time into tracking lock state according to clock, if the Big Dipper of outside, gps time source and ground elapsed time source all lost efficacy, ensure that clock synchronization system enters punctual state by high-performance crystal oscillator;
Described output unit is responsible for the time synchronized coding converted to by frequency information basic time of clock inside needed for engineering system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510631551.2A CN105301951B (en) | 2015-09-29 | 2015-09-29 | A kind of multi-source judgement implementation method of clock synchronization system based on analytic hierarchy process (AHP) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510631551.2A CN105301951B (en) | 2015-09-29 | 2015-09-29 | A kind of multi-source judgement implementation method of clock synchronization system based on analytic hierarchy process (AHP) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105301951A true CN105301951A (en) | 2016-02-03 |
| CN105301951B CN105301951B (en) | 2017-08-11 |
Family
ID=55199349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510631551.2A Active CN105301951B (en) | 2015-09-29 | 2015-09-29 | A kind of multi-source judgement implementation method of clock synchronization system based on analytic hierarchy process (AHP) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105301951B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106788846A (en) * | 2016-12-27 | 2017-05-31 | 天津七六四通信导航技术有限公司 | A kind of multi-source logic switch time service module and changing method based on ARM |
| CN106788838A (en) * | 2016-11-18 | 2017-05-31 | 中国电力科学研究院 | A kind of system and method for Power time synchronization system robust control |
| CN107947886A (en) * | 2017-11-24 | 2018-04-20 | 上海机电工程研究所 | System calibration method based on time-code and quasi- second |
| CN109983811A (en) * | 2016-11-30 | 2019-07-05 | 华为技术有限公司 | A kind of error correcting method synchronization time and equipment |
| CN110782709A (en) * | 2019-11-04 | 2020-02-11 | 四川九洲空管科技有限责任公司 | High-precision clock redundancy backup method for civil aviation ADS-B ground station system |
| CN110837221A (en) * | 2019-11-27 | 2020-02-25 | 深圳市力合微电子股份有限公司 | Method for effectively improving time service reliability and continuity |
| CN111045032A (en) * | 2019-12-28 | 2020-04-21 | 中国科学院国家授时中心 | Time synchronization motion delay correction method based on single-point pseudo-range reduction and application |
| CN111208726A (en) * | 2020-01-03 | 2020-05-29 | 中国船舶重工集团公司第七0七研究所 | Multi-source self-adaptive time service device and method |
| CN111313895A (en) * | 2020-03-30 | 2020-06-19 | 中国电子科技集团公司第五十四研究所 | System multi-reference-source multi-clock accurate time-frequency synthesis method |
| CN111983916A (en) * | 2019-05-21 | 2020-11-24 | 深圳市合讯电子有限公司 | Multimode satellite time service precision bad value eliminating system and method |
| WO2021081733A1 (en) * | 2019-10-29 | 2021-05-06 | 中国科学院微小卫星创新研究院 | Navigation satellite time system and autonomous recovery method therefor |
| CN113589679A (en) * | 2021-06-17 | 2021-11-02 | 中国科学院国家授时中心 | Satellite precision time transfer method based on interferometry |
| CN114727379A (en) * | 2021-01-04 | 2022-07-08 | 华为技术有限公司 | Synchronization method, synchronization device, storage medium and equipment |
| CN115499082A (en) * | 2022-11-08 | 2022-12-20 | 电信科学技术第五研究所有限公司 | Comprehensive source selection method based on multi-time source fusion |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009544A (en) * | 2006-01-27 | 2007-08-01 | 大唐移动通信设备有限公司 | System and method of automatic phase-locking tracking clock synchronization |
| CN102023567A (en) * | 2010-10-21 | 2011-04-20 | 国网电力科学研究院 | High-precision time service method for multi-time-source comprehensive calculation |
| CN103823361A (en) * | 2014-02-26 | 2014-05-28 | 中国能源建设集团广东省电力设计研究院 | Multi-source dynamic self-adaptation clock synchronization method and device |
| CN103906220A (en) * | 2012-12-24 | 2014-07-02 | 中国移动通信集团河北有限公司 | Server timing method and system, and GPS cloud management server |
| US20150022395A1 (en) * | 2013-07-16 | 2015-01-22 | O2Micro Inc. | Method and receiver for determining system time of a navigation system |
| CN104375414A (en) * | 2014-11-14 | 2015-02-25 | 国家电网公司 | Time consuming device time service method and device based on multiple time sources |
-
2015
- 2015-09-29 CN CN201510631551.2A patent/CN105301951B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009544A (en) * | 2006-01-27 | 2007-08-01 | 大唐移动通信设备有限公司 | System and method of automatic phase-locking tracking clock synchronization |
| CN102023567A (en) * | 2010-10-21 | 2011-04-20 | 国网电力科学研究院 | High-precision time service method for multi-time-source comprehensive calculation |
| CN103906220A (en) * | 2012-12-24 | 2014-07-02 | 中国移动通信集团河北有限公司 | Server timing method and system, and GPS cloud management server |
| US20150022395A1 (en) * | 2013-07-16 | 2015-01-22 | O2Micro Inc. | Method and receiver for determining system time of a navigation system |
| CN103823361A (en) * | 2014-02-26 | 2014-05-28 | 中国能源建设集团广东省电力设计研究院 | Multi-source dynamic self-adaptation clock synchronization method and device |
| CN104375414A (en) * | 2014-11-14 | 2015-02-25 | 国家电网公司 | Time consuming device time service method and device based on multiple time sources |
Non-Patent Citations (2)
| Title |
|---|
| 张柯等: "变电站自动化系统时钟同步方式", 《农村电气化》 * |
| 杜雪涛等: "北斗与GPS双授时在TD-SCDMA中的应用", 《电信工程技术与标准化》 * |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106788838B (en) * | 2016-11-18 | 2020-08-18 | 中国电力科学研究院 | System and method for robust control of power time synchronization system |
| CN106788838A (en) * | 2016-11-18 | 2017-05-31 | 中国电力科学研究院 | A kind of system and method for Power time synchronization system robust control |
| CN109983811A (en) * | 2016-11-30 | 2019-07-05 | 华为技术有限公司 | A kind of error correcting method synchronization time and equipment |
| CN109983811B (en) * | 2016-11-30 | 2021-01-29 | 华为技术有限公司 | Synchronous time error correction method and device |
| CN106788846B (en) * | 2016-12-27 | 2018-09-18 | 天津七六四通信导航技术有限公司 | A kind of multi-source logic switch time service module and switching method based on ARM |
| CN106788846A (en) * | 2016-12-27 | 2017-05-31 | 天津七六四通信导航技术有限公司 | A kind of multi-source logic switch time service module and changing method based on ARM |
| CN107947886A (en) * | 2017-11-24 | 2018-04-20 | 上海机电工程研究所 | System calibration method based on time-code and quasi- second |
| CN107947886B (en) * | 2017-11-24 | 2019-08-23 | 上海机电工程研究所 | System calibration method based on time-code and quasi- second |
| CN111983916A (en) * | 2019-05-21 | 2020-11-24 | 深圳市合讯电子有限公司 | Multimode satellite time service precision bad value eliminating system and method |
| WO2021081733A1 (en) * | 2019-10-29 | 2021-05-06 | 中国科学院微小卫星创新研究院 | Navigation satellite time system and autonomous recovery method therefor |
| CN110782709B (en) * | 2019-11-04 | 2020-11-03 | 四川九洲空管科技有限责任公司 | High-precision clock redundancy backup method for civil aviation ADS-B ground station system |
| CN110782709A (en) * | 2019-11-04 | 2020-02-11 | 四川九洲空管科技有限责任公司 | High-precision clock redundancy backup method for civil aviation ADS-B ground station system |
| CN110837221A (en) * | 2019-11-27 | 2020-02-25 | 深圳市力合微电子股份有限公司 | Method for effectively improving time service reliability and continuity |
| CN111045032A (en) * | 2019-12-28 | 2020-04-21 | 中国科学院国家授时中心 | Time synchronization motion delay correction method based on single-point pseudo-range reduction and application |
| CN111208726A (en) * | 2020-01-03 | 2020-05-29 | 中国船舶重工集团公司第七0七研究所 | Multi-source self-adaptive time service device and method |
| CN111208726B (en) * | 2020-01-03 | 2021-09-24 | 中国船舶重工集团公司第七0七研究所 | Multi-source self-adaptive time service device and method |
| CN111313895A (en) * | 2020-03-30 | 2020-06-19 | 中国电子科技集团公司第五十四研究所 | System multi-reference-source multi-clock accurate time-frequency synthesis method |
| CN111313895B (en) * | 2020-03-30 | 2023-03-28 | 中国电子科技集团公司第五十四研究所 | System multi-reference-source multi-clock accurate time-frequency synthesis method |
| CN114727379A (en) * | 2021-01-04 | 2022-07-08 | 华为技术有限公司 | Synchronization method, synchronization device, storage medium and equipment |
| CN113589679A (en) * | 2021-06-17 | 2021-11-02 | 中国科学院国家授时中心 | Satellite precision time transfer method based on interferometry |
| CN115499082A (en) * | 2022-11-08 | 2022-12-20 | 电信科学技术第五研究所有限公司 | Comprehensive source selection method based on multi-time source fusion |
| CN115499082B (en) * | 2022-11-08 | 2023-03-10 | 电信科学技术第五研究所有限公司 | Comprehensive source selection method based on multi-time source fusion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105301951B (en) | 2017-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105301951A (en) | Multi-source decision realization method of time synchronization system based on analytic hierarchy method | |
| CN103513569A (en) | Method for synchronizing redundant time of intelligent substation | |
| CN201812153U (en) | Precise time synchronizing device of digitalized transformer substation | |
| CN105527833A (en) | Beidou GPS dual-mode electric power time synchronizer | |
| CN203166515U (en) | Large-scale regional inter-power-grid splitting control system | |
| CN104579624A (en) | Clock synchronization method of network sampling intelligent substation | |
| CN103592842A (en) | Intelligent substation clock synchronization reliability method capable of improving network sampling | |
| CN105634641B (en) | Based on architecture for exchanging can cascade network communication accurate timing system and method | |
| CN111061147A (en) | Wireless network-based regional intelligent substation time service system and method | |
| CN104460312A (en) | GPS and Big Dipper double-mode timing method and system | |
| CN202475769U (en) | High-precision network clock server of LTE (Long Term Evolution) system | |
| CN103959688A (en) | Multiple clock domain clock synchronization method, wire card and Ethernet equipment | |
| CN103686982A (en) | Method for time synchronization based on clock information and node equipment | |
| CN112231267B (en) | B code timing method and device for domestic VPX architecture | |
| CN104079365A (en) | Control system and method for railway clock synchronization network | |
| CN105262565A (en) | Coding method and coding system capable of transmitting clock and data based on phase modulation | |
| CN103078401B (en) | The system and method for transformer station's time synchronized and sample-synchronous | |
| CN103369036A (en) | Point to point message synchrony-based sampling and controlling method | |
| CN103516423A (en) | Method and apparatus used for optical fiber clock remote transmission | |
| CN202818369U (en) | Clock server supporting IEC61850 clock information publishing | |
| CN102063055A (en) | Redundant UTC (universal coordinated time) time synchronization server | |
| CN103546269B (en) | A kind of lock in time message screening technique and device | |
| CN103412785B (en) | A kind of multi tate remote measurement method for synchronizing time | |
| CN102377502B (en) | Multilevel time synchronizing system and implementing method | |
| CN102186106B (en) | Clock synchronization device in single-frequency network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |