CN203812005U - Gps time service system - Google Patents
Gps time service system Download PDFInfo
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- CN203812005U CN203812005U CN201420207047.0U CN201420207047U CN203812005U CN 203812005 U CN203812005 U CN 203812005U CN 201420207047 U CN201420207047 U CN 201420207047U CN 203812005 U CN203812005 U CN 203812005U
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Abstract
A GPS time service system comprises a GPS antenna, a GPS receiver, a crystal oscillator, a counter, a 1PPS generator, a CPU controller and a time service output module. The GPS antenna is connected with an input end of the GPS receiver. An output end (I) of the GPS receiver is connected to an input end of the counter. An output end (I) of the counter is connected to an input end of the 1PPS generator. Accurate time output is completed by the 1PPS generator through the time service output module. The GPS time service system is not dependent on the time of a satellite signal but refers to the time of the satellite signal, relies on the crystal oscillator to generate a clock signal, compares an 1PPS signal and a reference signal through an edge comparator, continuously modifies and narrows the deviation between the output by the 1PPS and a standard time of a satellite signal, and finally obtains a precise time reference. Meanwhile, a temperature sensor disposed in the system can overcome the temperature's influence on the time reference.
Description
[technical field]
The utility model relates to computing machine in automated system, control device etc. field while carrying out school, relates in particular to GPS time dissemination system technical field.
[background technology]
?gPS time dissemination system is the high-tech product while carrying out school for the computing machine in automated system, control device etc.; GPS time service product obtains the time signal of standard from gps satellite; these information exchanges are crossed to various interface type and send automated system to and need the equipment of temporal information (computing machine, protective device, fault oscillograph, sequence of events recording device, automatic safety device), so just can reach the time synchronized of whole system.
Along with the develop rapidly of the cyber-net communication technology, the epoch of automated system digitizing, networking arrive.This is on the one hand for the exchanges data between each control and infosystem, analysis and application provide better platform, on the other hand various accuracys real-time and historical data time tag also had higher requirement.
A complete GPS time dissemination system comprises that gps antenna, gps receiver, crystal oscillator, counter, 1PPS generator (Pulse per second, 1pps=1Hz=1 time/second, GPS combination frequency standard), time service output etc. partly form.GPS time dissemination system common on market receives gps satellite signal by gps antenna, input signal is to the input end of gps receiver, and the output terminal of gps receiver is connected to the input end of counter, the output terminal of counter is connected to the input end of 1PPS generator, completes precise time export by 1PPS generator by time service output module.Wherein adopt crystal oscillator to guarantee the precision of system, crystal oscillator is connected respectively to counter and 1PPS generator.The 1PPS signal of general time service output often directly adopts the 1PPS signal output of GPS module, shortcoming: 1, the signal output of gps receiver is depended in the accuracy of system time service, when gps receiver declines when even not available because satellite-signal deteriorated (as weather reason etc.) causes 1PPS accuracy, the output accuracy of whole time dissemination system can not guarantee; 2, when satellite-signal is unavailable, time dissemination system General Requirements possesses punctual function, requires within the regular hour, to keep certain accuracy under the state of satellite-signal disappearance.Common time dissemination system adopts the precision that improves crystal oscillator to keep accuracy, the shortcoming of doing is like this that cost is high, adopt constant-temperature crystal oscillator or even atomic clock just can reach designing requirement, and along with the prolongation of time, the aging grade that crystal oscillator itself possesses can cause that frequency changes, drift etc., can cause accuracy to decline.
[summary of the invention]
The utility model has proposed a kind ofly not rely on satellite-signal, possessed the punctual function of ultra-long time and has kept the GPS time dissemination system of its system time precision for above situation
The GPS time dissemination system that the utility model is related, comprise gps antenna, gps receiver, crystal oscillator, counter, 1PPS generator, cpu controller, time service output module, gps antenna connects the input end of gps receiver, and the I output terminal of gps receiver is connected to the input end of counter, the I output terminal of counter is connected to the input end of 1PPS generator, by 1PPS generator, by time service output module, completing precise time exports, it is characterized in that, wherein the II output terminal of gps receiver is connected to the input end of edge comparer, the II output terminal of 1PPS generator is connected to edge comparer, and the output terminal of edge comparer is connected to the input end of adjuster, and the II output terminal of counter is connected to the input end of adjuster, the output terminal of adjuster is connected to the input end of cpu controller, and the III output terminal of counter is connected to the input end of cpu controller, and the I output terminal of cpu controller is connected to time service output module, and the II output terminal of cpu controller is connected to the input end of 1PPS generator,
This system also comprises a temperature sensor, and the output terminal of this temperature sensor is connected with the input end of cpu controller.
The GPS time dissemination system that the utility model is related, do not rely on the time of satellite-signal, it is the time of reference satellite signal, and rely on crystal oscillator clocking, by edge comparer comparison with by adjuster, constantly revise and dwindle and deviation between standard time of satellite-signal, finally obtain precise time benchmark, the temperature sensor of this system configuration can also overcome the impact of temperature on clock reference simultaneously.
[accompanying drawing explanation]
Fig. 1 is the related GPS time dissemination system prior art schematic diagram of the utility model;
Fig. 2 is the GPS time dissemination system schematic diagram after the related improvement of the utility model.
[embodiment]
Below in conjunction with the utility model the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 2, the time dissemination system of GPS shown in it, comprise gps antenna, gps receiver, crystal oscillator, counter, 1PPS generator, cpu controller, time service output module, gps antenna connects the input end of gps receiver, and the I output terminal of gps receiver is connected to the input end of counter, the I output terminal of counter is connected to the input end of 1PPS generator, by 1PPS generator, by time service output module, completing precise time exports, wherein the II output terminal of gps receiver is connected to the input end of edge comparer, the II output terminal of 1PPS generator is connected to edge comparer, and the output terminal of edge comparer is connected to the input end of adjuster, and the II output terminal of counter is connected to the input end of adjuster, the output terminal of adjuster is connected to the input end of cpu controller, and the III output terminal of counter is connected to the input end of cpu controller, and the I output terminal of cpu controller is connected to time service output module, and the II output terminal of cpu controller is connected to the input end of 1PPS generator,
This system also comprises a temperature sensor, and the output terminal of this temperature sensor is connected with the input end of cpu controller.
First, 1PPS generator produces 1PPS signal by the clock signal of crystal oscillator, be input to edge comparer with the reference signal of gps receiver simultaneously, carry out edge comparison, obtain time deviation, be input to adjuster, adjuster is adjusted parameter according to deviation data and is input to 1PPS generator, and the time deviation between the output of 1PPS generator and reference signal is diminished; Then, repeat process above, finally make the output of 1PPS generator and the deviation between gps reference signal keep in 200ns, realize with reference signal between " synchronizeing ".
Should obtain by GPS time dissemination system the method for precise time benchmark, also comprise temperature deviation calibration process, utilize correct time to pass through the frequency departure of counter measures crystal oscillator, measure the temperature of temperature sensor simultaneously, record the impact of temperature variation on crystal oscillator output, make temperature-frequency curve; Utilize this curve in conjunction with temperature sensor, precise time benchmark is calibrated.
The GPS time dissemination system that the utility model is related, do not rely on the time of satellite-signal, it is the time of reference satellite signal, rely on crystal oscillator clocking, by edge comparer comparison with by adjuster, constantly revise and dwindle and deviation between standard time of satellite-signal, finally obtain precise time benchmark, the temperature sensor of this system configuration can also overcome the impact of temperature on clock reference simultaneously.
The above, it is only the utility model preferred embodiment, not the utility model is done to any pro forma restriction, although the utility model discloses as above with preferred embodiment, yet not in order to limit the utility model, any those skilled in the art, do not departing within the scope of technical solutions of the utility model, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be not depart from technical solutions of the utility model content, according to the utility model technology, refer to any simple modification that above embodiment is done, equivalent variations and modification, all belong in the scope of technical solutions of the utility model.
Claims (2)
1. a GPS time dissemination system, comprise gps antenna, gps receiver, crystal oscillator, counter, 1PPS generator, cpu controller, time service output module, gps antenna connects the input end of gps receiver, and the I output terminal of gps receiver is connected to the input end of counter, the I output terminal of counter is connected to the input end of 1PPS generator, by 1PPS generator, by time service output module, completing precise time exports, it is characterized in that, wherein the II output terminal of gps receiver is connected to the input end of edge comparer, the II output terminal of 1PPS generator is connected to edge comparer, and the output terminal of edge comparer is connected to the input end of adjuster, and the II output terminal of counter is connected to the input end of adjuster, the output terminal of adjuster is connected to the input end of cpu controller, and the III output terminal of counter is connected to the input end of cpu controller, and the I output terminal of cpu controller is connected to time service output module, and the II output terminal of cpu controller is connected to the input end of 1PPS generator.
2. according to GPS time dissemination system described in claim 1, it is characterized in that, this system also comprises a temperature sensor, and the output terminal of this temperature sensor is connected with the input end of cpu controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420207047.0U CN203812005U (en) | 2014-04-26 | 2014-04-26 | Gps time service system |
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| CN201420207047.0U CN203812005U (en) | 2014-04-26 | 2014-04-26 | Gps time service system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913987A (en) * | 2014-04-26 | 2014-07-09 | 广西电网公司电力科学研究院 | GPS timing system and method for obtaining precise time reference through GPS timing system |
| CN105759600A (en) * | 2014-12-19 | 2016-07-13 | 云南电网公司电力科学研究院 | Beidou Satellite-based power grid system time-service system |
| CN107843773A (en) * | 2017-10-24 | 2018-03-27 | 中国电子科技集团公司第二十研究所 | The measurement method of pulse per second (PPS) precision |
| CN107945479A (en) * | 2017-11-23 | 2018-04-20 | 中国电子科技集团公司第四十研究所 | A kind of wireless synchronization analogue communication software program method |
| CN109976137A (en) * | 2019-04-23 | 2019-07-05 | 国网天津市电力公司 | A kind of system, method and substation for improving the punctual precision of satellite time transfer signal |
| CN114994727A (en) * | 2022-07-18 | 2022-09-02 | 成都迅翼卫通科技有限公司 | Equipment for realizing high-precision time calibration and satellite positioning |
-
2014
- 2014-04-26 CN CN201420207047.0U patent/CN203812005U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913987A (en) * | 2014-04-26 | 2014-07-09 | 广西电网公司电力科学研究院 | GPS timing system and method for obtaining precise time reference through GPS timing system |
| CN103913987B (en) * | 2014-04-26 | 2017-04-05 | 广西电网公司电力科学研究院 | GPS time dissemination systems and its method for obtaining accurate time reference |
| CN105759600A (en) * | 2014-12-19 | 2016-07-13 | 云南电网公司电力科学研究院 | Beidou Satellite-based power grid system time-service system |
| CN107843773A (en) * | 2017-10-24 | 2018-03-27 | 中国电子科技集团公司第二十研究所 | The measurement method of pulse per second (PPS) precision |
| CN107945479A (en) * | 2017-11-23 | 2018-04-20 | 中国电子科技集团公司第四十研究所 | A kind of wireless synchronization analogue communication software program method |
| CN109976137A (en) * | 2019-04-23 | 2019-07-05 | 国网天津市电力公司 | A kind of system, method and substation for improving the punctual precision of satellite time transfer signal |
| CN114994727A (en) * | 2022-07-18 | 2022-09-02 | 成都迅翼卫通科技有限公司 | Equipment for realizing high-precision time calibration and satellite positioning |
| CN114994727B (en) * | 2022-07-18 | 2022-12-02 | 成都迅翼卫通科技有限公司 | Equipment for realizing high-precision time calibration and satellite positioning |
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Granted publication date: 20140903 |