CN207731092U - A kind of Big Dipper timing type terminal - Google Patents
A kind of Big Dipper timing type terminal Download PDFInfo
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- CN207731092U CN207731092U CN201721581799.3U CN201721581799U CN207731092U CN 207731092 U CN207731092 U CN 207731092U CN 201721581799 U CN201721581799 U CN 201721581799U CN 207731092 U CN207731092 U CN 207731092U
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Abstract
The utility model discloses a kind of Big Dipper timing type terminal, include for receiving the processing wideband navigational route type antenna of BD2 B1 and BD2 B3 frequency point weak signals, the radiofrequency signal for receiving antenna be transformed into the radio frequency down-conversion module of intermediate-freuqncy signal, the timing type receiver module for handling intermediate-freuqncy signal, the time difference for correcting the machine in real time and frequency difference when frequency module, power module of the display with the display control module of control and for providing power supply for above-mentioned modules for realizing system information states；The power input of the output end connection modules of the power module, the output end of the input terminal connection wideband navigational route type antenna of radio frequency down-conversion module, the input terminal of the output end connection timing type receiver module of radio frequency down-conversion module, the input terminal of frequency module when the output end of timing type receiver module connects.The utility model can realize positioning, timing function under complex environment, and positioning accuracy is high, ensure that demand of the user to split-second precision information.
Description
Technical field
The utility model is related to satellite navigation and positioning and temporal frequency technical field, especially a kind of Big Dipper timing terminal.
Background technology
It is higher and higher to the accuracy requirement of chronometer time and time with the fast development of science and technology.In recent years, northern
Bucket satellite navigation system emerges rapidly, as Beidou satellite navigation technology has obtained more and more extensive answer in every field
With Big Dipper time service terminal is also come into being.The split-second precision information that Big Dipper time service terminal is resolved using received navigation signal
The comprehensive high-precision time service service for realizing NTP, B code, PTP and serial ports etc..
Currently, it is domestic based on the Big Dipper when frequency terminal also in the elementary step, industrialization level is also relatively low, there are no than
More ripe time service terminal.External time service terminal be mainly using crystal oscillator as when frequency module GPS time service terminals, cost
Height, stability is low, and it is incompatible with domestic Beidou satellite navigation system, it cannot be satisfied domestic fortune control system high stability
It is required that there is greatly security risks.For domestic correspondent to the overall background of split-second precision server demands, need to study
New time service terminal replaces GPS time service terminals, realizes production domesticization and the high stability of time server.
Utility model content
The utility model technical issues that need to address are to provide a kind of with high-precision, the Big Dipper timing type of high stability
Terminal improves time service precision, meets market using merging for Technique of Satellite Navigation and Positioning and time and frequency measurement and taming technology
Demand.
In order to solve the above technical problems, technical solution adopted in the utility model is as follows.
A kind of Big Dipper timing type terminal, including be used to receive processing BD2-B1 and BD2-B3 frequency points weak signal and BD2- is provided
The wideband navigational route type antenna of B1, BD2-B3 frequency point satellite navigation radio-frequency signal, the radiofrequency signal for receiving antenna are transformed to
The radio frequency down-conversion module of intermediate-freuqncy signal, the timing type receiver module for being handled intermediate-freuqncy signal, for repairing in real time
The time difference of positive the machine and frequency difference and outputting standard temporal frequency information when frequency module, the display for realizing system information states
Power module with the display control module of control and for providing power supply for above-mentioned modules；The output end of the power module connects
The power input of modules is connect, the output end of frequency module, the radio frequency down-conversion mould when input terminal of display control module connects
The output end of the input terminal connection wideband navigational route type antenna of block, the output end of radio frequency down-conversion module connect timing type receiver mould
The input terminal of block, the input terminal of frequency module when the output end of timing type receiver module connects.
A kind of above-mentioned Big Dipper timing type terminal, frequency module includes for the navigation signal received to be transformed into when described
The PPS generation modules of PPS signal, the temporal information for sending timing type receiver module are converted to time reference signal
Time generation module, the time interval measurement module for detecting the PPS signal time difference and frequency difference, for according to the time difference of detection and
Frequency difference provides the height for taming time and frequency that PPS signal is corrected with punctual module and according to correction value order of correction value order
Precision Rb atom frequency marking；The output end of input terminal connection the timing type receiver module and PPS generation modules of time generation module,
The input terminal of the output end Connection Time interval measurement module of time generation module, the output end connection of time interval measurement module
The input terminal with punctual module is tamed, the input terminal for connecting high-precision Rb atom frequency marking with the output end of punctual module is tamed, it is high
The input terminal of the output end connection PPS generation modules of precision Rb atom frequency marking.
A kind of above-mentioned Big Dipper timing type terminal, frequency module further includes the B codes for exporting IRIG-B difference DC codes when described
Generation module and NTP modules for exporting NTP codes, the output end of the input terminal Connection Time generation module of NTP modules, B codes
The input terminal of generation module connects with the output end of time generation module, PPS generation modules and high-precision Rb atom frequency marking respectively
It connects.
As a result of above technical scheme, technological progress acquired by the utility model is as follows.
The utility model based on the temporal information of Big Dipper timing receipt, calculated by taming with punctual forecast by machine output
Method forecasts the drift of local clock the high-precision rubidium frequency standard using time-frequency inside modules and taming and punctual module make
When 10MHz, PPS, B code of the frequency module output and standard time frequency information precision higher such as NTP, more stable, meet currently
The demand of mainstream market.The utility model can realize positioning, timing function under complex environment, and positioning accuracy is high, ensure
Demand of the user to split-second precision information.
Description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is utility model works flow diagram；
Fig. 3 is radio frequency down-conversion module circuit diagram described in the utility model；
Fig. 4 is timing type receiver module circuit diagram described in the utility model；
Fig. 5 is time-frequency module circuit diagram described in the utility model；
Fig. 6 is display control module circuit diagram described in the utility model；
Fig. 7 is power module circuitry figure described in the utility model.
Specific implementation mode
Below in conjunction with specific embodiment, the present invention will be further described in detail.
A kind of Big Dipper timing type terminal, structure as shown in Figure 1, including wideband navigational route type antenna, radio frequency down-conversion module,
Timing type receiver module, when frequency module, display control module and power module.Wideband navigational route type antenna is used for receiving processing BD2-B1
With BD2-B3 frequency points weak signal and provide BD2-B1 and BD2-B3 frequency point satellite navigation radio-frequency signals；Radio frequency down-conversion module is used for
The radiofrequency signal that antenna receives is transformed to intermediate-freuqncy signal respectively；Timing type receiver module is used for carrying out two-way intermediate-freuqncy signal
Processing；When frequency module be used for correcting in real time the machine the time difference and frequency difference and outputting standard temporal frequency information；Display control module is used
To realize the display and control of system information and state；Power module is used for providing power supply for above-mentioned modules.
Radio frequency down-conversion module in the utility model, timing type receiver module, when frequency module, display control module and power supply mould
Block circuit diagram is as shown in Fig. 3 to Fig. 7.
The input terminal of the output end connection radio frequency down-conversion module of wideband navigational route type antenna, the output of radio frequency down-conversion module
The input terminal of end connection timing type receiver module, the input terminal of frequency module when the output end of timing type receiver module connects,
The output end of frequency module when the input terminal connection of display control module, the power input of the output end connection modules of power module
End.
When frequency module include PPS generation modules, time generation module, time interval measurement module, tame with punctual module,
High-precision Rb atom frequency marking, B codes generation module, NTP modules.PPS generation modules are used for the navigation signal received being transformed into
PPS signal；Time generation module is used for the temporal information that timing type receiver module is sent being converted into time reference signal；When
Interval measurement module is used for detecting the time difference and the frequency difference of PPS signal；It tames and the time difference and frequency difference of the punctual module according to detection
Provide correction value；High-precision Rb atom frequency marking is used for correcting time and the frequency of PPS signal according to correction value order；B codes generate
Module is used for exporting IRIG-B difference DC codes；NTP modules are used for exporting NTP codes.The input terminal connection timing of time generation module
The output end of type receiving module and PPS generation modules, the output end Connection Time interval measurement module of time generation module it is defeated
Enter end, the output end connection of time interval measurement module tames the input terminal with punctual module, tames the output with punctual module
The input terminal of end connection high-precision Rb atom frequency marking, the input of the output end connection PPS generation modules of high-precision Rb atom frequency marking
The input terminal at end, the output end of the input terminal Connection Time generation module of NTP modules, B code generation modules is separately connected time life
At module, the output end of PPS generation modules and high-precision Rb atom frequency marking.
The workflow of the utility model is as shown in Fig. 2, unlatching power module, makes each module normal work of terminal, wideband
Navigational route type antenna receives the weak signal of BD2-B1, BD2-B3 frequency point, provides BD2-B1, BD2-B3 frequency point satellite navigation radio-frequency signal
Radio frequency down-conversion module is given, the B3 frequency points signal in the radiofrequency signal that radio frequency down-conversion module inputs antenna and B1 frequency point signals
Intermediate frequency is transformed to respectively, and for timing type receiver module after obtaining 2 road analog if signals, internal baseband processing module is complete
At the ADC processing of 2 road analog intermediate frequencies, the capturing of navigation signal, related, demodulation, positioning calculation, and it will be positioned by serial ports, is fixed
When, status information result export frequency module to when, the PPS generation modules and time generation module of time-frequency inside modules, simultaneously will
PPS signal gives time interval measurement module, time interval measurement module and tames and provides the time difference and frequency difference with punctual module
Correction value, corrects the frequency of the PPS and Rb atom frequency marking of the machine in real time, and passes through two-way standard 10M sines leading-out terminal, two-way
PPS leading-out terminals, two-way IRIG-B difference DC codes leading-out terminal, two-way 10/100M network interface NTP service terminals, serial ports is real all the way
Now positioning, timing, the output of status information, display control module show the information of output.
Big Dipper timing type terminal can real-time be selected according to the result of its autonomous integrity monitoring in the utility model
Select operating mode, operating mode of the information process unit residing for timing type receiver select optimal satellite-signal combine and
Optimal time service mode carry out respective handling obtain clock correction so that drive PPS signal generation make local zone time keep with satellite when
Between precise synchronization；When timing type receiver module and outer frequency marking input signal are abnormal or interrupt, then punctual mould is worked in
The clock correction information of formula, information process unit output is invalid；Mainly by taming with punctual prediction algorithm, the drift to local clock
It is forecast, using the high-precision rubidium frequency standard of time-frequency inside modules, taming and punctual module, temporal information generation module, is carried out
Algorithm process and filtering reduce the shake of 1PPS signals, improve time service precision.
Claims (3)
1. a kind of Big Dipper timing type terminal, it is characterised in that：Including being used to receive processing BD2-B1 and BD2-B3 frequency point weak signals
And provide wideband navigational route type antenna, the radio frequency for receiving antenna of BD2-B1, BD2-B3 frequency point satellite navigation radio-frequency signal
Signal be transformed to the radio frequency down-conversion module of intermediate-freuqncy signal, the timing type receiver module for being handled intermediate-freuqncy signal,
The time difference and frequency difference for correcting the machine in real time and outputting standard temporal frequency information when frequency module, for realizing system information
Power module of the display of state with the display control module of control and for providing power supply for above-mentioned modules；The power module
Output end connection modules power input, display control module input terminal connection when frequency module output end, it is described to penetrate
The output end of the input terminal connection wideband navigational route type antenna of frequency down conversion module, the output end connection timing of radio frequency down-conversion module
The input terminal of type receiver module, the input terminal of frequency module when the output end of timing type receiver module connects.
2. a kind of Big Dipper timing type terminal according to claim 1, it is characterised in that：Frequency module includes for that will connect when described
The navigation signal received is transformed into the PPS generation modules of PPS signal, the temporal information for sending timing type receiver module
Be converted to the time generation module of time reference signal, the time interval measurement module for detecting the PPS signal time difference and frequency difference,
For providing the taming with punctual module and according to correction value order amendment PPS of correction value order according to the time difference and frequency difference of detection
The time of signal and the high-precision Rb atom frequency marking of frequency；Time generation module input terminal connection timing type receiver module and
The output end of PPS generation modules, the input terminal of the output end Connection Time interval measurement module of time generation module, time interval
The input terminal with punctual module is tamed in the output end connection of measurement module, is tamed and is connect high-precision rubidium with the output end of punctual module
The input terminal of atomic frequency standard, the input terminal of the output end connection PPS generation modules of high-precision Rb atom frequency marking.
3. a kind of Big Dipper timing type terminal according to claim 1, it is characterised in that：Frequency module further includes for defeated when described
Go out the B codes generation module of IRIG-B difference DC codes and the NTP modules for exporting NTP codes, the input terminal Connection Time of NTP modules
The output end of generation module, the input terminals of B code generation modules respectively with time generation module, PPS generation modules and high-precision
The output end of Rb atom frequency marking connects.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721581799.3U CN207731092U (en) | 2017-11-23 | 2017-11-23 | A kind of Big Dipper timing type terminal |
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| CN201721581799.3U CN207731092U (en) | 2017-11-23 | 2017-11-23 | A kind of Big Dipper timing type terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541931A (en) * | 2018-12-11 | 2019-03-29 | 广东电网有限责任公司 | A kind of nanosecond time dissemination system |
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- 2017-11-23 CN CN201721581799.3U patent/CN207731092U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541931A (en) * | 2018-12-11 | 2019-03-29 | 广东电网有限责任公司 | A kind of nanosecond time dissemination system |
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