CN203480244U - Time service correcting unit based on big dipper - Google Patents
Time service correcting unit based on big dipper Download PDFInfo
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- CN203480244U CN203480244U CN201320433585.7U CN201320433585U CN203480244U CN 203480244 U CN203480244 U CN 203480244U CN 201320433585 U CN201320433585 U CN 201320433585U CN 203480244 U CN203480244 U CN 203480244U
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- big dipper
- time service
- phase discriminator
- digital phase
- crystal oscillator
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Abstract
The utility model relates to a communication field especially relates to time service correcting unit based on big dipper. Contain handheld machine of big dipper, handheld machine connection digital phase discriminator of big dipper, local crystal oscillator time service device is still connected to the digital phase discriminator, local crystal oscillator time service device contains voltage-controlled crystal oscillator, voltage-controlled crystal oscillator is connecting frequency multiplier and shaping amplifier, digital phase discriminator is connected to the frequency multiplier, shaping amplifier connects digital phase discriminator after the frequency divider, digital phase discriminator connects the wave filter. The digital phase discriminator also comprises a GPS receiver which is connected with the digital phase discriminator. The novel satellite signal correction device can perform irregular correction by utilizing bidirectional time service, and is timed by depending on a system crystal oscillator when a satellite signal is lost; the positioning information of the GPS is used for calculating the one-way time delay, eliminating the relation between positioning and time, and improving the precision; and comparing the 1PPS signals of the GPS and the Beidou for monitoring and judging the validity of the signals.
Description
Technical field
The utility model relates to the communications field, relates in particular to the time service means for correcting based on the Big Dipper.
Background technology
Chronometer time is the basic physical parameter of scientific research, scientific experiment and engineering aspects, basis coordinates when it provides for dynamical system, time-ordered measurement and quantitative examination, and time service has extensive and important application at the industrial circles such as communication, electric power, control and national defence field.
Time reference is the key basis of country, is also to solve the interconnected importance prerequisite of network islands, and particularly for specialized function network, time reference is the correct Main Means transmitting of guarantee information.The world is used gps system time service at present, but its strategic poor reliability, along with the appearance of China's Beidou satellite navigation system, utilizes the application of Big Dipper time service more and more extensive.But there is limitation in the use of dipper system, be suitable for the time service of fixed position, when mobile there is coupling in time service and location, and base when the motor-driven time service of system is easily lost, can only be used the machine crystal oscillator.
Anxious scarce a kind of hardware combinations, can realize the time service of the Big Dipper and proofread and correct at present.
Utility model content
The object of utility model: in order to provide a kind of time service accurate, with the time service means for correcting based on the Big Dipper of self-correction function.
In order to reach as above object, the utility model is taked following technical scheme:
Time service means for correcting based on the Big Dipper, it is characterized in that, comprise Big Dipper hand-held set, described Big Dipper hand-held set linking number digit phase discriminator, described digital phase discriminator also connects the machine crystal oscillator time service device, and described the machine crystal oscillator time service device comprises VCXO, described VCXO is connecting frequency multiplier and shaping amplifier, described frequency multiplier linking number digit phase discriminator, linking number digit phase discriminator after described shaping amplifier connection frequency divider, described digital phase discriminator connects wave filter.
The further technical scheme of the utility model is, also comprises GPS receiver, described GPS receiver linking number digit phase discriminator.
The further technical scheme of the utility model is, described digital phase discriminator connection D/A converter, and described D/A converter connects VCXO.
The further technical scheme of the utility model is, also comprises output system, and described output system is voice system and display screen system, and described output system is connected with digital phase discriminator.
The further technical scheme of the utility model is, described GPS receiver is connected feed circuit jointly with Big Dipper hand-held set.
The further technical scheme of the utility model is, each own selector switch between described GPS receiver and Big Dipper hand-held set the two and feed circuit.
The further technical scheme of the utility model is, described output system also connects warning device, and described warning device is warning lamp.
Adopt as above the utility model of technical scheme, with respect to prior art, have following beneficial effect: this novel two-way timing that can utilize is irregularly revised, rely on system crystal oscillator to keep time when satellite-signal is lost; By the locating information of GPS, calculate one-way timing time delay, eliminate the contact between location and time service, promote precision; The 1PPS signal of contrast GPS and the Big Dipper, for monitoring and judge the validity of signal.The design fundamental purpose of this scheme is to guarantee the reliability of time dissemination system, seeking balance in making full use of resource and promoting time service precision as possible.Good reliability, precision stability are good, and take full advantage of GPS free resource, for solving the interconnected and formation time synchronous network system of network islands, provide powerful support.
Accompanying drawing explanation
In order to further illustrate the utility model, below in conjunction with accompanying drawing, further describe:
Fig. 1 is new structure connection diagram;
Fig. 2 is new-type circuit syndeton schematic diagram;
Fig. 3 revises and time service schematic diagram the time.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described, embodiment does not form restriction of the present utility model:
Time service means for correcting based on the Big Dipper, it is characterized in that, comprise Big Dipper hand-held set, described Big Dipper hand-held set linking number digit phase discriminator, described digital phase discriminator also connects the machine crystal oscillator time service device, and described the machine crystal oscillator time service device comprises VCXO, described VCXO is connecting frequency multiplier and shaping amplifier, described frequency multiplier linking number digit phase discriminator, linking number digit phase discriminator after described shaping amplifier connection frequency divider, described digital phase discriminator connects wave filter.
This place at least provides the hardware of Big Dipper time service to connect basis, has at least realized this technical functionality.
The time service of the Big Dipper hand-held set at this place can be detected by the machine crystal oscillator time service device, thereby its accuracy is calibrated.Can also revise time service.
Also comprise GPS receiver, described GPS receiver linking number digit phase discriminator.Two-way timing needs the time to grow but precision is good, be suitable for fixed position, but one-way timing speed is fast, and precision is slightly poor.These features for Two-way Time and unidirectional timing, can both work alone in actual use, also can work in combination, and to bring into play best performance.Also by the mode of unidirectional timing, keep regularly under normal conditions the time synchronized of subscriber computer and central station system, at a long cycle interval, carry out Two-way Time one time, to revise the deviation that may introduce in links.Namely with the least possible Two-way Time and unidirectional timing, be used in conjunction with, reach the precision that approaches Two-way Time.Described digital phase discriminator connects D/A converter, and described D/A converter connects VCXO.
Also comprise output system, described output system is voice system and display screen system, and described output system is connected with digital phase discriminator.Not only can realize inner correction, can also be by the result output that detects and revise.
Described GPS receiver is connected feed circuit jointly with Big Dipper hand-held set.Therefore can conveniently use, with a hand-held set, can realize two kinds of basic functions.
Each own selector switch between described GPS receiver and Big Dipper hand-held set the two and feed circuit.Therefore can carry out selectively unlocking, also can two all open.
Described output system also connects warning device, and described warning device is warning lamp.When time service is inaccurate, can also report to the police.
More than show and described ultimate principle of the present utility model, principal character and advantage of the present utility model.Those skilled in the art should understand the utility model and not be restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed scope.
Claims (7)
1. the time service means for correcting based on the Big Dipper, it is characterized in that, comprise Big Dipper hand-held set, described Big Dipper hand-held set linking number digit phase discriminator, described digital phase discriminator also connects the machine crystal oscillator time service device, and described the machine crystal oscillator time service device comprises VCXO, described VCXO is connecting frequency multiplier and shaping amplifier, described frequency multiplier linking number digit phase discriminator, linking number digit phase discriminator after described shaping amplifier connection frequency divider, described digital phase discriminator connects wave filter.
2. the time service means for correcting based on the Big Dipper as claimed in claim 1, is characterized in that, also comprises GPS receiver, described GPS receiver linking number digit phase discriminator.
3. the time service means for correcting based on the Big Dipper as claimed in claim 2, is characterized in that, described digital phase discriminator connects D/A converter, and described D/A converter connects VCXO.
4. the time service means for correcting based on the Big Dipper as claimed in claim 2, is characterized in that, also comprises output system, and described output system is voice system and display screen system, and described output system is connected with digital phase discriminator.
5. the time service means for correcting based on the Big Dipper as claimed in claim 2, is characterized in that, described GPS receiver is connected feed circuit jointly with Big Dipper hand-held set.
6. the time service means for correcting based on the Big Dipper as claimed in claim 2, is characterized in that, each own selector switch between described GPS receiver and Big Dipper hand-held set the two and feed circuit.
7. the time service means for correcting based on the Big Dipper as claimed in claim 4, is characterized in that, described output system also connects warning device, and described warning device is warning lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320433585.7U CN203480244U (en) | 2013-07-22 | 2013-07-22 | Time service correcting unit based on big dipper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320433585.7U CN203480244U (en) | 2013-07-22 | 2013-07-22 | Time service correcting unit based on big dipper |
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| Publication Number | Publication Date |
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| CN203480244U true CN203480244U (en) | 2014-03-12 |
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| CN201320433585.7U Expired - Fee Related CN203480244U (en) | 2013-07-22 | 2013-07-22 | Time service correcting unit based on big dipper |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104460310A (en) * | 2014-11-19 | 2015-03-25 | 广西大学 | Time service device based on Beidou 2nd generation satellite 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 |
| CN105867107A (en) * | 2016-04-08 | 2016-08-17 | 唐道勇 | Low-power high-precision time service system |
| CN106292267A (en) * | 2016-07-28 | 2017-01-04 | 武汉纳时科技有限公司 | A kind of GNSS high accuracy time service terminal system and time service method |
| CN106292268A (en) * | 2016-07-28 | 2017-01-04 | 武汉纳时科技有限公司 | Method is tamed in time service terminal unit based on GNSS receiver and pulse per second (PPS) |
| CN109343332A (en) * | 2018-12-04 | 2019-02-15 | 北京七维航测科技股份有限公司 | Time dissemination system based on Big Dipper satellite signal |
-
2013
- 2013-07-22 CN CN201320433585.7U patent/CN203480244U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104460310A (en) * | 2014-11-19 | 2015-03-25 | 广西大学 | Time service device based on Beidou 2nd generation satellite 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 |
| CN105867107A (en) * | 2016-04-08 | 2016-08-17 | 唐道勇 | Low-power high-precision time service system |
| CN105867107B (en) * | 2016-04-08 | 2019-06-21 | 广州北极瑞光电子科技有限公司 | A kind of low power consumption high-precision time dissemination system |
| CN106292267A (en) * | 2016-07-28 | 2017-01-04 | 武汉纳时科技有限公司 | A kind of GNSS high accuracy time service terminal system and time service method |
| CN106292268A (en) * | 2016-07-28 | 2017-01-04 | 武汉纳时科技有限公司 | Method is tamed in time service terminal unit based on GNSS receiver and pulse per second (PPS) |
| CN106292268B (en) * | 2016-07-28 | 2018-10-26 | 武汉纳时科技有限公司 | Time service terminal device and pulse per second (PPS) based on GNSS receiver tame method |
| CN106292267B (en) * | 2016-07-28 | 2019-08-02 | 武汉纳时科技有限公司 | A kind of GNSS high-precision time service terminal system and time service method |
| CN109343332A (en) * | 2018-12-04 | 2019-02-15 | 北京七维航测科技股份有限公司 | Time dissemination system based on Big Dipper satellite signal |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20150722 |
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| EXPY | Termination of patent right or utility model |