CN105743503A - Atomic clock servo system, atomic clock servo device as well as method and device used for synchronous phase discrimination - Google Patents
Atomic clock servo system, atomic clock servo device as well as method and device used for synchronous phase discrimination Download PDFInfo
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- CN105743503A CN105743503A CN201610071393.4A CN201610071393A CN105743503A CN 105743503 A CN105743503 A CN 105743503A CN 201610071393 A CN201610071393 A CN 201610071393A CN 105743503 A CN105743503 A CN 105743503A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/26—Automatic control of frequency or phase; Synchronisation using energy levels of molecules, atoms, or subatomic particles as a frequency reference
Abstract
The invention discloses an atomic clock servo system, an atomic clock servo device as well as a method and a device used for synchronous phase discrimination. The atomic clock servo system comprises a microprocessor for sending a frequency synthesis instruction, a 79Hz keying frequency modulation signal and a 79Hz phase discrimination signal; a frequency synthesizer connected with the microprocessor; a physical system for carrying out quantum frequency discrimination for a comprehensive modulation signal; a phase adjustment module for receiving the 79Hz phase discrimination signal and carrying out phase adjustment for the 79Hz phase discrimination signal; and a synchronous phase discrimination module for receiving a frequency discrimination signal of the physical system and the 79Hz phase discrimination signal after phase adjustment, wherein the synchronous phase discrimination module transmits a result of synchronous phase discrimination to the microprocessor to enable the microprocessor to generate a corresponding synchronous phase discrimination voltage-controlled signal and then transmit the signal to a crystal oscillator. According to the atomic clock servo system, the atomic clock servo device as well as the method and the device used for synchronous phase discrimination, the phase of the synchronous phase discrimination signal is modified precisely based on a practical atomic clock, and the beneficial effect of improving the precision of servo synchronous phase discrimination is achieved.
Description
Technical field
The invention belongs to Technology of Atomic Frequency Standards field, particularly to a kind of atomic clock servosystem, equipment, be used for synchronizing method and the device of phase demodulation.
Background technology
In inactive type rubidium atom frequency scale, physical system is the core component of whole atomic frequency standard, and it provides the atomic resonance Absorption Line that a frequency stable, live width are narrower.After comprehensive modulation, the microwave interrogation signals with modulation coming from quartz oscillator VCXO of electronic circuit generation acts on physical system, after quantum frequency discrimination, by the servo circuit process to quantum frequency discrimination information, the output frequency of quartz crystal local oscillator is locked in the hyperfine 0-0 transition center frequency of ground state of rubidium atom the most at last.Quantum frequency discrimination signal is carried out synchronizing phase demodulation by existing most of servo circuit according to the comprehensive synchronization phase discrimination signal provided, and adopt the mode of the independent voltage-controlled local oscillator of D/A to realize the closed loop locking of complete machine according to identified result information, eventually through the frequency signal that local oscillator output stability is higher.But, owing to complete machine exists phase noise, therefore traditional producing the phase locked comprehensive modulation signal of two-way in integration module and synchronize phase discrimination signal, after the frequency discrimination effect of physical system, there is certain phase contrast in servo module, carry out synchronization phase demodulation synchronization phase discrimination signal and quantum frequency discrimination signal, so the synchronization identified result of servo module can be produced impact, thus affecting the overall frequency degree of stability of atomic frequency standard further.
Can according to actual atomic clock in consideration of it, this patent proposition is a kind of, accurately amendment synchronizes the phase place of phase discrimination signal, thus the method improving the precision of servo synchronization phase demodulation.
Summary of the invention
The present invention provide a kind of atomic clock servosystem, equipment, for synchronizing method and the device of phase demodulation, solve or part solve above-mentioned technical problem in prior art.
Based on one aspect of the present invention, it is provided that a kind of atomic clock servosystem, including: microprocessor, transmission frequency synthetic instruction, 79Hz keying FM signal and 79Hz phase discrimination signal；Frequency synthesizer, is connected with described microprocessor, is used for receiving described frequency synthesis instruction and 79Hz keying FM signal, and signal is comprehensively modulated in generation；Physical system, carries out quantum frequency discrimination to described comprehensive modulation signal, produces physical system frequency discrimination signal；Phase adjusting module, receives described 79Hz phase discrimination signal and described 79Hz phase discrimination signal is entered horizontal phasing control；Synchronize phase demodulation module, the described 79Hz phase discrimination signal after receiving described physical system frequency discrimination signal and being phase adjusted, carry out synchronizing phase demodulation；Wherein, described synchronization phase demodulation module will synchronize the result transmission of phase demodulation to described microprocessor, make described microprocessor produce corresponding synchronization phase demodulation voltage control signal transmission to crystal oscillator.
Optionally, described microprocessor and described frequency synthesizer carry out signal transmission in the way of serial communication, and described microprocessor transmits described 79Hz keying FM signal by the keying frequency modulation pin of described frequency synthesizer.
Based on another aspect of the present invention, it is provided that a kind of atomic clock servosystem, including: phase adjusting module, receive 79Hz phase discrimination signal and described 79Hz phase discrimination signal is entered horizontal phasing control；Physical system, receives and comprehensively modulates signal after 79Hz keying FM signal is processed, carry out quantum frequency discrimination, produce physical system frequency discrimination signal；Synchronize phase demodulation module, receive described physical system frequency discrimination signal, and phase adjusted after described 79Hz phase discrimination signal, carry out synchronizing phase demodulation；Wherein, the result synchronizing phase demodulation is transmitted to microprocessor by described synchronization phase demodulation module, makes described microprocessor produce corresponding synchronization phase demodulation voltage control signal and transmits to crystal oscillator.
Based on another aspect of the invention, it is provided that a kind of method synchronizing phase discrimination signal, including: generate frequency synthesis instruction, 79Hz keying FM signal and 79Hz phase discrimination signal；Comprehensively modulate signal according to described frequency synthesis instruction synthesis, and make the dynamic scope of described comprehensive modulated signal wave between 5.3125MHz-f to 5.3125MHz+ Δ f by described 79Hz keying FM signal；Described comprehensive modulation signal is carried out quantum frequency discrimination, produces physical system frequency discrimination signal；Described 79Hz phase discrimination signal is entered horizontal phasing control；Described physical system frequency discrimination signal is carried out Tong Bu phase demodulation with described 79Hz phase discrimination signal, with produce accordingly synchronize phase demodulation voltage control signal act on crystal oscillator.
Optional: according to described frequency synthesis instruction, to produce the described comprehensive modulation signal of direct digital synthesis technique with external clock for reference source.
Optional: described Δ f is determined by the concrete live width of atomic frequency standard physical system.
Optional: described comprehensive modulation signal produces the microwave interrogation signals of 6834.6875MHz+ Δ f after microwave times, mixing and acts on physical system, after the quantum frequency discrimination effect of physical system, produce described physical system frequency discrimination signal deliver to synchronization phase demodulation module carry out synchronize phase demodulation.
Finally, present invention also offers a kind of device synchronizing phase discrimination signal, including: generation module, it is used for generating frequency synthesis instruction, 79Hz keying FM signal and 79Hz phase discrimination signal；Synthesis module, for comprehensively modulating signal according to described frequency synthesis instruction synthesis, and makes the dynamic scope of described comprehensive modulated signal wave between 5.3125MHz-Δ f to 5.3125MHz+ Δ f by described 79Hz keying FM signal；Quantum frequency discriminator block, carries out quantum frequency discrimination to described comprehensive modulation signal, produces physical system frequency discrimination signal；Phase adjusting module, enters horizontal phasing control to described 79Hz phase discrimination signal；Synchronize phase demodulation unit, described physical system frequency discrimination signal is carried out Tong Bu phase demodulation with described 79Hz phase discrimination signal, with produce accordingly synchronization phase demodulation voltage control signal act on crystal oscillator.
Optionally, described synthesis module particularly as follows: according to described frequency synthesis instruction, produce the described comprehensive modulation signal of direct digital synthesis technique with external clock for reference source.
Optionally, also include: pretreatment module, for described comprehensive modulation signal being produced 6834.6875MHz+ Δ f microwave interrogation signals after microwave times, mixing and acting on physical system.
Beneficial effect:
Atomic clock servosystem provided by the invention, equipment, for synchronizing method and the device of phase demodulation, by microprocessor transmission frequency synthetic instruction, 79Hz keying FM signal and 79Hz phase discrimination signal；Frequency synthesizer is connected with described microprocessor, is used for receiving described frequency synthesis instruction and 79Hz keying FM signal, and signal is comprehensively modulated in generation；Described comprehensive modulation signal is carried out quantum frequency discrimination by physical system, produces physical system frequency discrimination signal；Phase adjusting module receives described 79Hz phase discrimination signal and described 79Hz phase discrimination signal is entered horizontal phasing control；Synchronize the described 79Hz phase discrimination signal after phase demodulation module receives described physical system frequency discrimination signal and be phase adjusted, carry out synchronizing phase demodulation；Finally, described synchronization phase demodulation module will synchronize the result transmission of phase demodulation to described microprocessor, make described microprocessor produce corresponding synchronization phase demodulation voltage control signal transmission to crystal oscillator.Achieving the present invention according to actual atomic clock, accurately amendment synchronizes the phase place of phase discrimination signal, to reach to improve the beneficial effect of the precision of servo synchronization phase demodulation.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The theory structure block diagram of the atomic clock servosystem that Fig. 1 provides for the embodiment of the present invention；
The schematic flow sheet of the method for synchronizing phase demodulation that Fig. 2 provides for the embodiment of the present invention；
The structured flowchart of the device for synchronizing phase demodulation that Fig. 3 provides for the embodiment of the present invention；
The physical system frequency discrimination output locking signal waveform diagram that Fig. 4 provides for the embodiment of the present invention；
The synchronization phase-demodulating principle figure that Fig. 5 provides for the embodiment of the present invention；
The phase place that Fig. 6 provides for the embodiment of the present invention adjust after synchronization phase-demodulating principle figure.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain, broadly fall into the scope of protection of the invention；Wherein involved in this enforcement "and/or" key word, represent and or two kinds of situations, in other words, A and/or B mentioned by the embodiment of the present invention, illustrates A and B, two kinds of situations of A or B, describes three kinds of states existing for A and B, such as A and/or B, expression: only include A and do not include B；Only include B and do not include A；Including A and B.
Meanwhile, in the embodiment of the present invention, when assembly is referred to as " being fixed on " another assembly, it can directly on another assembly or can also there is assembly placed in the middle.When an assembly is considered as " connection " another assembly, it can be directly to another assembly or may be simultaneously present assembly placed in the middle.When an assembly is considered as " being arranged at " another assembly, it can be set directly on another assembly or may be simultaneously present assembly placed in the middle.The term " vertical ", " level ", "left", "right" and the similar statement that use in the embodiment of the present invention are merely for purposes of illustration, and are not intended to the restriction present invention.
Refer to Fig. 1, embodiments provide a kind of atomic clock servosystem, including: microprocessor 110, frequency synthesizer 120, synchronization phase demodulation module 130, phase adjusting module 140 and physical system 150.
Wherein, microprocessor 110 is by serial communication mode to frequency synthesizer 120 transmission frequency synthetic instruction, and microprocessor 110 directly send a road 79Hz keying FM signal to keying frequency modulation pin (i.e. FSK) of frequency synthesizer 120 simultaneously.Simultaneously, frequency synthesizer 120 1 aspect, receive the frequency synthesis instruction sent of microprocessor 110, with external clock be reference source produce the 5.3125MHz ± Δ f of direct digital synthesis technique comprehensively modulate signal, wherein the size of Δ f is determined by the concrete live width of atomic frequency standard physical system.Receive the 79Hz keying FM signal of microprocessor 110 on the other hand, comprehensively modulate signal with 79Hz for frequency cycle keying output 5.3125MHz+ Δ f and 5.3125MHz-Δ f in order to control frequency synthesizer 120.
Simultaneously, the comprehensive modulation signal of described 5.3125MHz ± Δ f produces the microwave interrogation signals of 6834.6875MHz ± Δ f after microwave times, mixing and acts on physical system 150, after the quantum frequency discrimination effect of physical system 150, producing physical system frequency discrimination signal and deliver to synchronization phase demodulation module 130, what simultaneously microprocessor 110 produced also delivers to Tong Bu phase demodulation module 130 with the 79Hz phase discrimination signal delivering to 79Hz keying FM signal in frequency synthesizer 120 and having same phase.The frequency discrimination signal of physical system 150 carries out in Tong Bu phase demodulation module 130 with 79Hz phase discrimination signal synchronizing phase demodulation, and result is delivered to microprocessor 110, acts on crystal oscillator in order to produce synchronization phase demodulation voltage control signal accordingly.
In embodiments of the present invention, it should be noted that, produce the identical 79Hz keying FM signal of two-way phase place by microprocessor 110 in theory and 79Hz synchronizes phase discrimination signal, but owing to whole atomic frequency standard system exists the phase noise on circuit, and in order to the convenient phase demodulation that synchronizes carries out voltage difference collection, need to carry out 79Hz keying FM signal and the phase place adjustment of 79Hz synchronization phase discrimination signal in different systems, therefore introduce phase adjusting module 140 in this application, the mechanism of its adjustment is as follows: from traditional atomic frequency standard circuit, loop each point signal is carried out detailed analysis.Assuming that comprehensively modulation signal is S=Asin (2 π ft)；Then physical system light cell light inspection first-harmonic is output as: S1=ABsin (2 π ft+ φ+φ1), wherein, φ is equal to 0 or 180 degree, φ1It is phase modulation and the phase shift of frequency multiplier circuit introducing.
After frequency-selecting is amplified, signal expression is S2=KaABsin (2 π ft+ φ+φ1+φ2), φ2It it is the phase shift of frequency-selective amplifier in atomic frequency standard circuit.
Because the mathematical expression of phase sensitive detection is multiplier, after phase-sensitive amplifier, signal is AC compounent in the filter action of integrator, phase-sensitive amplifier output will be filtered, and the voltage-controlled voltage finally exported is SV=(1/2) KaKpABcos (φ+φ1+φ2).Any reason causes (φ1+φ2) change, all will cause the change in gain of system, thus producing frequency drift.In order to make system worked well and there is maximum gain, it is necessary to add the phase shifter in systems to offset (φ1+φ2) phase shift.
It addition, digitized components and parts higher owing to have employed signal to noise ratio in conventional art, therefore (φ can be reduced to a certain extent1+φ2) phase shift, but still can exist, how its impact necessarily reflects in the final stage servo synchronization phase demodulation of whole atomic frequency standard system, and its core technology is the collection that the locking signal to physical system output carries out voltage difference.What kind of speed is the 79Hz square wave FM signal frequency being added on synthesizer in order to realize keying frequency modulation decide with to switch the frequency signal about amount of alignment subcenter frequency, existence due to the relaxation time of atomic spin, so the keying fm microwave signal being added in physical system is after the frequency discrimination effect of physical system, locking signal waveform as shown in Figure 4 can be produced further, in the locking signal waveform shown in accompanying drawing 4, except the relaxation time C district considering atomic spin, more emphasis point should be put A in the drawings during for circuit design, on B, because A, B district servo module just carries out synchronizing the region that phase discrimination signal voltage difference gathers.In DDS link, the 79Hz square-wave signal of keying frequency modulation is produced by microprocessor, then the 79Hz of servosystem collection synchronizes the sequential of phase demodulation and also produced by it, and two paths of signals phase place is identical.The high steady frequency source identical with DDS part is adopted owing to the external clock of microprocessor 110 remains, as long as therefore the difference of two paths of signals phase place sets at the beginning, it is considered herein that phase contrast is constant in allowed limits, this promise servosystem is when synchronizing the sampling of phase discrimination signal voltage difference, and position A, B of sampling is certain every time.
In embodiments of the present invention, for the lock-out state in Fig. 4, the synchronization phase demodulation process figure of servo module see shown in Fig. 5, although synchronizing two sampled points that phase discrimination signal determines in upper figure and improper, on a certain actual atomic clock, can pass through to observe the synchronization phase discrimination signal waveform that the output of corresponding physical system frequency discrimination signal produces with microprocessor, as shown in Figure 5, the phase place synchronizing phase discrimination signal in Fig. 5 is changed, please as shown in Figure 6 by phase adjusting module 140 enabled microprocessor 110 in Fig. 1.Synchronize the precision of phase demodulation, present invention A, B sample region in figure 6 to improve servo loop further, the method arranging n times sample mean, with the impact reducing locking signal A, synchronization phase demodulation is produced by the level shake in B district.Additionally, the present invention is by utilizing the mode of this digital modulation, it is beneficial to and changes phase contrast easily, because for each actual inactive type rubidium atom frequency scale, due to the discordance that physical piece is different and circuit is constituted, inevitable different in quantum frequency discrimination output element, then the sampling time sequence of servosystem and the phase contrast of modulation timing are also different.
Another embodiment of the present invention provides a kind of atomic clock servosystem, including: phase adjusting module, receive 79Hz phase discrimination signal and described 79Hz phase discrimination signal is entered horizontal phasing control；Physical system, receives and comprehensively modulates signal after 79Hz keying FM signal is processed, carry out quantum frequency discrimination, produce physical system frequency discrimination signal；Synchronize phase demodulation module, receive described physical system frequency discrimination signal, and phase adjusted after described 79Hz phase discrimination signal, carry out synchronizing phase demodulation；Wherein, the result synchronizing phase demodulation is transmitted to microprocessor by described synchronization phase demodulation module, makes described microprocessor produce corresponding synchronization phase demodulation voltage control signal and transmits to crystal oscillator.
It should be noted that, in another embodiment of the present invention atomic clock servosystem, phase adjusting module, physical system, synchronization phase demodulation module and each phase adjusting module in atomic clock servosystem, physical system, synchronization phase demodulation module are identical, repeating no more, not detailed part refers to the detailed description of each several part in atomic clock servosystem embodiment herein.
Referring to Fig. 2, one more embodiment of the present invention provides a kind of method synchronizing phase discrimination signal, and described method at least comprises the steps:
Step 201: generate frequency synthesis instruction, 79Hz keying FM signal and 79Hz phase discrimination signal；
Step 202: comprehensively modulate signal according to described frequency synthesis instruction synthesis, and make the dynamic scope of described comprehensive modulated signal wave between 5.3125MHz-Δ f to 5.3125MHz+ Δ f by described 79Hz keying FM signal；
Specifically, according to described frequency synthesis instruction, the described comprehensive modulation signal of direct digital synthesis technique is produced with external clock for reference source.And described Δ f is determined by the concrete live width of atomic frequency standard physical system.
Step 203: described comprehensive modulation signal carries out quantum frequency discrimination, produces physical system frequency discrimination signal；
Step 204: described 79Hz phase discrimination signal is entered horizontal phasing control；
Step 205: described physical system frequency discrimination signal is carried out Tong Bu phase demodulation with described 79Hz phase discrimination signal, with produce accordingly synchronize phase demodulation voltage control signal act on crystal oscillator.
Wherein, described comprehensive modulation signal produces the microwave interrogation signals of 6834.6875MHz+ Δ f after microwave times, mixing and acts on physical system, after the quantum frequency discrimination effect of physical system, produce described physical system frequency discrimination signal deliver to synchronization phase demodulation module carry out synchronize phase demodulation.
Based on a kind of method synchronizing phase discrimination signal that the embodiment of the present invention provides, refer to Fig. 3, the embodiment of the present invention additionally provides a kind of device synchronizing phase discrimination signal, including: generation module, it is used for generating frequency synthesis instruction, 79Hz keying FM signal and 79Hz phase discrimination signal；Synthesis module, for comprehensively modulating signal according to described frequency synthesis instruction synthesis, and makes the dynamic scope of described comprehensive modulated signal wave between 5.3125MHz-Δ f to 5.3125MHz+ Δ f by described 79Hz keying FM signal；Quantum frequency discriminator block, carries out quantum frequency discrimination to described comprehensive modulation signal, produces physical system frequency discrimination signal；Phase adjusting module, enters horizontal phasing control to described 79Hz phase discrimination signal；Synchronize phase demodulation unit, described physical system frequency discrimination signal is carried out Tong Bu phase demodulation with described 79Hz phase discrimination signal, with produce accordingly synchronization phase demodulation voltage control signal act on crystal oscillator.
As preferably, synthesis module described in the device synchronizing phase discrimination signal that the embodiment of the present invention provides particularly as follows: according to described frequency synthesis instruction, produce the described comprehensive modulation signal of direct digital synthesis technique with external clock for reference source.
As preferably, in the device synchronizing phase discrimination signal that the embodiment of the present invention provides, also including: pretreatment module, for described comprehensive modulation signal being produced 6834.6875MHz+ Δ f microwave interrogation signals after microwave times, mixing and acting on physical system.
It should be noted that device embodiment provided by the invention is corresponding with embodiment of the method, repeating no more, the non-detailed portion of device embodiment refers to embodiment of the method herein.
The beneficial effect of the embodiment of the present invention:
Atomic clock servosystem provided by the invention, equipment, for synchronizing method and the device of phase demodulation, by microprocessor transmission frequency synthetic instruction, 79Hz keying FM signal and 79Hz phase discrimination signal；Frequency synthesizer is connected with described microprocessor, is used for receiving described frequency synthesis instruction and 79Hz keying FM signal, and signal is comprehensively modulated in generation；Described comprehensive modulation signal is carried out quantum frequency discrimination by physical system, produces physical system frequency discrimination signal；Phase adjusting module receives described 79Hz phase discrimination signal and described 79Hz phase discrimination signal is entered horizontal phasing control；Synchronize the described 79Hz phase discrimination signal after phase demodulation module receives described physical system frequency discrimination signal and be phase adjusted, carry out synchronizing phase demodulation；Finally, described synchronization phase demodulation module will synchronize the result transmission of phase demodulation to described microprocessor, make described microprocessor produce corresponding synchronization phase demodulation voltage control signal transmission to crystal oscillator.Achieving the present invention according to actual atomic clock, accurately amendment synchronizes the phase place of phase discrimination signal, to reach to improve the beneficial effect of the precision of servo synchronization phase demodulation.
Although preferred embodiments of the present invention have been described, but those skilled in the art are once know basic creative concept, then these embodiments can be made other change and amendment.So, claims are intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, the present invention can be carried out various change and modification without deviating from the spirit and scope of the present invention by those skilled in the art.So, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
As seen through the above description of the embodiments, those skilled in the art is it can be understood that can add the mode of required general hardware platform by software to the present invention and realize.Based on such understanding, the part that prior art is contributed by technical scheme substantially in other words can embody with the form of software product, this computer software product can be stored in storage medium, such as ROM/RAM, magnetic disc, CD etc., including some instructions with so that a computer equipment (can be personal computer, server, or the network equipment etc.) perform the method described in some part of each embodiment of the present invention or embodiment.
Each embodiment in this specification all adopts the mode gone forward one by one to describe, between each embodiment identical similar part mutually referring to, what each embodiment stressed is the difference with other embodiments.Especially for device or system embodiment, owing to it is substantially similar to embodiment of the method, so describing fairly simple, relevant part illustrates referring to the part of embodiment of the method.Apparatus and system embodiment described above is merely schematic, the wherein said module illustrated as separating component can be or may not be physically separate, the parts shown as unit can be or may not be physical location, namely may be located at a place, or can also be distributed on multiple NE.Some or all of module therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
Above to atomic clock servosystem provided by the present invention, equipment, it is used for synchronizing method and the device of phase demodulation, it is described in detail, principles of the invention and embodiment are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention；Simultaneously for one of ordinary skill in the art, according to the thought of the present invention, all will change in specific embodiments and applications.In sum, this specification content should not be construed as limitation of the present invention.
Claims (10)
1. an atomic clock servosystem, it is characterised in that including:
Microprocessor, transmission frequency synthetic instruction, 79Hz keying FM signal and 79Hz phase discrimination signal；
Frequency synthesizer, is connected with described microprocessor, is used for receiving described frequency synthesis instruction and 79Hz keying FM signal, and signal is comprehensively modulated in generation；
Physical system, carries out quantum frequency discrimination to described comprehensive modulation signal, produces physical system frequency discrimination signal；
Phase adjusting module, receives described 79Hz phase discrimination signal and described 79Hz phase discrimination signal is entered horizontal phasing control；
Synchronize phase demodulation module, the described 79Hz phase discrimination signal after receiving described physical system frequency discrimination signal and being phase adjusted, carry out synchronizing phase demodulation；
Wherein, described synchronization phase demodulation module will synchronize the result transmission of phase demodulation to described microprocessor, make described microprocessor produce corresponding synchronization phase demodulation voltage control signal transmission to crystal oscillator.
2. atomic clock servosystem as claimed in claim 1, it is characterised in that
Described microprocessor and described frequency synthesizer carry out signal transmission in the way of serial communication, and described microprocessor transmits described 79Hz keying FM signal by the keying frequency modulation pin of described frequency synthesizer.
3. an atomic clock servosystem, it is characterised in that including:
Phase adjusting module, receives 79Hz phase discrimination signal and described 79Hz phase discrimination signal is entered horizontal phasing control；
Physical system, receives and comprehensively modulates signal after 79Hz keying FM signal is processed, carry out quantum frequency discrimination, produce physical system frequency discrimination signal；
Synchronize phase demodulation module, receive described physical system frequency discrimination signal, and phase adjusted after described 79Hz phase discrimination signal, carry out synchronizing phase demodulation；
Wherein, the result synchronizing phase demodulation is transmitted to microprocessor by described synchronization phase demodulation module, makes described microprocessor produce corresponding synchronization phase demodulation voltage control signal and transmits to crystal oscillator.
4. the method synchronizing phase discrimination signal, it is characterised in that including:
Generate frequency synthesis instruction, 79Hz keying FM signal and 79Hz phase discrimination signal；
Comprehensively modulate signal according to described frequency synthesis instruction synthesis, and make the dynamic scope of described comprehensive modulated signal wave between 5.3125MHz-Δ f to 5.3125MHz+ Δ f by described 79Hz keying FM signal；
Described comprehensive modulation signal is carried out quantum frequency discrimination, produces physical system frequency discrimination signal；
Described 79Hz phase discrimination signal is entered horizontal phasing control；
Described physical system frequency discrimination signal is carried out Tong Bu phase demodulation with described 79Hz phase discrimination signal, with produce accordingly synchronize phase demodulation voltage control signal act on crystal oscillator.
5. the method synchronizing phase discrimination signal as claimed in claim 4, it is characterised in that:
According to described frequency synthesis instruction, produce the described comprehensive modulation signal of direct digital synthesis technique with external clock for reference source.
6. the method synchronizing phase discrimination signal as described in claim 4 or 5, it is characterised in that:
Described Δ f is determined by the concrete live width of atomic frequency standard physical system.
7. the method synchronizing phase discrimination signal as claimed in claim 6, it is characterised in that:
Described comprehensive modulation signal produces the microwave interrogation signals of 6834.6875MHz+ Δ f after microwave times, mixing and acts on physical system, after the quantum frequency discrimination effect of physical system, produce described physical system frequency discrimination signal deliver to synchronization phase demodulation module carry out synchronize phase demodulation.
8. the device synchronizing phase discrimination signal, it is characterised in that including:
Generation module, is used for generating frequency synthesis instruction, 79Hz keying FM signal and 79Hz phase discrimination signal；
Synthesis module, for comprehensively modulating signal according to described frequency synthesis instruction synthesis, and makes the dynamic scope of described comprehensive modulated signal wave between 5.3125MHz-Δ f to 5.3125MHz+ Δ f by described 79Hz keying FM signal；
Quantum frequency discriminator block, carries out quantum frequency discrimination to described comprehensive modulation signal, produces physical system frequency discrimination signal；
Phase adjusting module, enters horizontal phasing control to described 79Hz phase discrimination signal；
Synchronize phase demodulation unit, described physical system frequency discrimination signal is carried out Tong Bu phase demodulation with described 79Hz phase discrimination signal, with produce accordingly synchronization phase demodulation voltage control signal act on crystal oscillator.
9. device as claimed in claim 8, it is characterised in that described synthesis module particularly as follows:
According to described frequency synthesis instruction, produce the described comprehensive modulation signal of direct digital synthesis technique with external clock for reference source.
10. device as claimed in claim 8 or 9, it is characterised in that also include:
Pretreatment module, for producing 6834.6875MHz+ Δ f microwave interrogation signals to described comprehensive modulation signal and acting on physical system after microwave times, mixing.
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Application publication date: 20160706 |