CN203366003U - Atomic clock with optimized drifting - Google Patents
Atomic clock with optimized drifting Download PDFInfo
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- CN203366003U CN203366003U CN 201320313546 CN201320313546U CN203366003U CN 203366003 U CN203366003 U CN 203366003U CN 201320313546 CN201320313546 CN 201320313546 CN 201320313546 U CN201320313546 U CN 201320313546U CN 203366003 U CN203366003 U CN 203366003U
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- atomic clock
- correction voltage
- voltage
- compensation
- vcxo
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Abstract
The utility model discloses an atomic clock with optimized drifting and belongs to the field of atomic clocks. The atomic clock comprises a voltage-controlled crystal oscillator, a quantum system used for providing quantum frequency discrimination signals, and a synchronous phase discrimination module for performing synchronous phase discrimination on the quantum frequency discrimination signals provided by the quantum system and reference signals and obtaining a phase discrimination result. The atomic clock further comprises an execution module used for obtaining deviation rectification voltage according to the phase discrimination result of the synchronous phase discrimination module, compensating for the deviation rectification voltage with compensation deviation rectification voltage and outputting the compensated deviation rectification voltage to the voltage-controlled crystal oscillator. The compensation deviation rectification voltage is equal to a result obtained by multiplying the day burn-in drift rate of the voltage-controlled crystal oscillator by the voltage-controlled slope of the voltage-controlled crystal oscillator. The execution module is respectively connected with the synchronous phase discrimination module and the voltage-controlled crystal oscillator. The atomic clock with optimized drifting can improve the stability in outputting signals of the whole atomic clock.
Description
Technical field
The utility model relates to the atomic clock field, particularly a kind of atomic clock that drifts about and optimize.
Background technology
Atomic clock, as high stable, high-precision clock source, just is being widely used in the various fields such as space flight, navigation and communication.
Existing atomic clock mainly comprises VCXO(Voltage Controlled X'tal Oscillator, VCXO), microwave interrogation signals generation module, quantized system and synchronous phase demodulation module.Wherein, the signal of VCXO output is processed and is produced the microwave interrogation signals through comprehensive, the SHG and THG of microwave interrogation signals generation module, after this microwave interrogation signals acts on quantized system, produces quantum frequency discrimination signal; Synchronous phase demodulation module provides this quantum frequency discrimination signal reference signal with microwave interrogation signals generation module is synchronizeed phase demodulation, produce correction voltage and act on VCXO, thereby change the output of VCXO, and then VCXO output is locked on the hyperfine 0-0 centre frequency of atomic ground state.
In realizing process of the present utility model, the inventor finds that at least there is following problem in prior art: in actual atomic clock application, due to factors such as temperature change and longevity of services, the frequency of VCXO output signal will produce skew, thereby affect the degree of stability of atomic clock complete machine output.
The utility model content
In order to solve due to factors such as temperature change and longevity of services, the frequency of VCXO output signal will produce the problem of skew, and the utility model embodiment provides a kind of atomic clock that drifts about and optimize.Described technical scheme is as follows:
The utility model embodiment provides a kind of atomic clock that drifts about and optimize, described atomic clock comprises VCXO, for quantized system that quantum frequency discrimination signal is provided and for the quantum frequency discrimination signal that described quantized system is provided, is synchronizeed phase demodulation with reference signal, obtain the synchronous phase demodulation module of identified result, described atomic clock also comprises:
For according to the identified result of described synchronous phase demodulation module, obtaining the voltage of rectifying a deviation, and adopt compensation correction voltage to compensate the described correction voltage obtained, the correction voltage after the output compensation is to the execution module of described VCXO;
The day aging drift rate that described compensation correction voltage equals described VCXO is multiplied by the voltage-controlled slope of described VCXO, and described execution module is connected with described VCXO with the described phase demodulation module of synchronizeing respectively.
Preferably, described execution module comprises:
For the corresponding relation with correction voltage in preset identified result, obtain the acquiring unit of correction voltage corresponding to the identified result of described synchronous phase demodulation module; And
Compensate the compensating unit of the correction voltage after the output compensation for the described correction voltage that adopts described compensation correction voltage to obtain described acquiring unit;
Described compensating unit is connected with described acquiring unit.
Alternatively, described execution module also comprises:
For the correction voltage after the compensation that judges the output of described compensating unit whether in preset range; Correction voltage after described compensation is in described preset range the time, exports the correction voltage after described compensation; Correction voltage after described compensation not in described preset range the time, is exported the performance element of preset correction voltage;
Described compensating unit is connected with described performance element.
Alternatively, described atomic clock also comprises:
For under the effect of reference voltage, the described correction voltage after the compensation of described execution module output is carried out to digital-to-analog conversion, and the digital to analog converter of described VCXO extremely of the correction Voltage-output after change,
Described execution module is connected with described VCXO by described digital to analog converter.
Alternatively, described atomic clock also comprises:
The temperature control modules that is predetermined temperature for the temperature of working environment of controlling described atomic clock.
Preferably, described temperature control modules comprises:
Detecting unit for detection of the actual temperature of described working environment;
Actual temperature and the described predetermined temperature of the described working environment detected for more described detecting unit, obtain the comparing unit of comparative result; And
For the comparative result obtained according to described comparing unit, the regulon that is predetermined temperature by the adjustment of described working environment;
Described comparing unit is connected with described regulon with described detecting unit respectively.
Preferably, described detecting unit comprises thermistor.
Preferably, described regulon comprises Temperature Controlling Chip.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is: by execution module, according to the identified result of synchronous phase demodulation module, obtain the voltage of rectifying a deviation, and adopting compensation correction voltage to compensate the correction voltage obtained, the correction voltage after the output compensation is to VCXO; Because compensation correction voltage will cause the frequency change of VCXO output signal, and this compensation correction voltage day aging drift rate of equaling VCXO is multiplied by the voltage-controlled slope of VCXO; Therefore, this frequency change can compensate the frequency shift (FS) that VCXO causes because of aging drift factors such as temperature change and longevity of services, and then improves the degree of stability of atomic clock complete machine output signal.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the atomic clock of a kind of optimization of drifting about that the utility model embodiment provides;
Fig. 2 is the structural representation of the atomic clock optimized of another drift that the utility model embodiment provides.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
Embodiment
The utility model embodiment provides a kind of atomic clock that drifts about and optimize, referring to Fig. 1, this atomic clock comprises VCXO10, for quantized system 11 that quantum frequency discrimination signal is provided and for the quantum frequency discrimination signal that quantized system 11 is provided, is synchronizeed phase demodulation with reference signal, obtains the synchronous phase demodulation module 12 of identified result.This atomic clock also comprises:
Obtain for the identified result according to synchronous phase demodulation module 12 voltage of rectifying a deviation, and adopt compensation correction voltage to compensate the correction voltage obtained, the correction voltage after the output compensation is to the execution module 13 of VCXO10.Wherein, the day aging drift rate that this compensation correction voltage equals VCXO10 is multiplied by the voltage-controlled slope of VCXO10.This execution module 13 respectively with synchronize phase demodulation module 12 and be connected with VCXO10.
Particularly, the day aging drift rate of VCXO10 is, the aging drift rate of VCXO10 every day.Day, aging drift rate can be calculated (the annual aging drift rate is divided by 365) according to the annual aging drift rate of VCXO10.The annual aging drift rate can be provided by the production firm of VCXO10.
What deserves to be explained is, compensation correction voltage will cause that the frequency of VCXO10 output signal changes, and this frequency change can compensate VCXO10 because the frequency change that aging drift causes affects, and then improves the degree of stability of atomic clock complete machine output signal.
Preferably, referring to Fig. 2, execution module 13 comprises:
For at the corresponding relation of preset identified result-correction voltage, obtain the acquiring unit 131 of correction voltage corresponding to the identified result of synchronous phase demodulation module 12; Compensate the compensating unit 132 of the correction voltage after the output compensation for the correction voltage that adopts compensation correction voltage to obtain acquiring unit 131; Compensating unit 132 is connected with acquiring unit 131.
Particularly, the identified result of synchronous phase demodulation module 12 can be the frequency of quantum frequency discrimination signal.The corresponding relation of identified result-correction voltage can comprise: the mapping relations between the correction magnitude of voltage of the frequency of quantum frequency discrimination signal and input VCXO10, this correction magnitude of voltage has determined the frequency that the frequency of VCXO10 output signal is quantum frequency discrimination signal.The corresponding relation of identified result-correction voltage can set in advance in acquiring unit 131.
Alternatively, execution module 13 also comprises: for the correction voltage after the compensation that judges compensating unit 132 output whether in preset range; Correction voltage after compensation is in preset range the time, exports the correction voltage after this compensation; Correction voltage after compensation not in preset range the time, is exported the performance element 133 of preset correction voltage.Compensating unit 132 is connected with performance element 133.
Particularly, stored the preset range of correction voltage in performance element 133, this preset range has determined the scope of VCXO10 output signal frequency.Suppose that this preset range is for [V1, V2], V1 > V2.After correction magnitude of voltage V after compensating unit 132 output compensation, performance element 133 judges whether V is positioned at [V1, V2], if V is not positioned at [V1, V2] (V > V2 or V<V1), correction voltage the output after by way of compensation by preset correction magnitude of voltage V0, otherwise, if V is positioned at [V1, V2] (V1<V<V2), export V.Like this, in being controlled among a small circle by atomic clock complete machine output frequency, make the atomic clock output frequency be linear change, be convenient to adopt existing measurement scheme (first by least square method deduction drift recycling Allan variance computational stability) to be assessed the frequency stability of atomic clock complete machine output signal.
Alternatively, referring to Fig. 2, this atomic clock also comprises: the temperature control modules 14 that is predetermined temperature for the temperature of the working environment of controlling atomic clock.
Preferably, temperature control modules 14 comprises:
Detecting unit 141 for detection of the actual temperature of working environment; For actual temperature and the predetermined temperature of the working environment that relatively detecting unit 141 detects, obtain the comparing unit 142 of comparative result; For the comparative result obtained according to comparing unit 142, the regulon 143 that is predetermined temperature by the adjustment of working environment.Comparing unit 142 is connected with regulon 143 with detecting unit 141 respectively.Preferably, detecting unit 141 can comprise thermistor.Regulon 143 can comprise Temperature Controlling Chip.
Preferably, referring to Fig. 2, this atomic clock also comprises: under the effect of reference voltage, the correction voltage after the compensation of execution module 13 outputs is carried out to digital-to-analog conversion, and the correction Voltage-output after changing is to the digital to analog converter 15 of VCXO10.Execution module 13 is connected with VCXO10 by digital to analog converter 15.
Particularly, the structure of digital to analog converter 15, with the structure of existing digital to analog converter, is not described in detail in this.
The beneficial effect that the above-mentioned atomic clock that the utility model embodiment provides brings is: by execution module, according to the identified result of synchronous phase demodulation module, obtain the voltage of rectifying a deviation, and adopting compensation correction voltage to compensate the correction voltage obtained, the correction voltage after the output compensation is to VCXO; Because compensation correction voltage will cause the frequency change of VCXO output signal, and this compensation correction voltage day aging drift rate of equaling VCXO is multiplied by the voltage-controlled slope of VCXO; Therefore, this frequency change can compensate the frequency shift (FS) that VCXO causes because of aging drift factors such as temperature change and longevity of services, and then improves the degree of stability of atomic clock complete machine output signal.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. an atomic clock that drifts about and optimize, described atomic clock comprises VCXO, for quantized system that quantum frequency discrimination signal is provided and for the quantum frequency discrimination signal that described quantized system is provided, is synchronizeed phase demodulation with reference signal, obtain the synchronous phase demodulation module of identified result, it is characterized in that, described atomic clock also comprises:
For according to the identified result of described synchronous phase demodulation module, obtaining the voltage of rectifying a deviation, and adopt compensation correction voltage to compensate the described correction voltage obtained, the correction voltage after the output compensation is to the execution module of described VCXO;
The day aging drift rate that described compensation correction voltage equals described VCXO is multiplied by the voltage-controlled slope of described VCXO, and described execution module is connected with described VCXO with the described phase demodulation module of synchronizeing respectively.
2. atomic clock according to claim 1, is characterized in that, described execution module comprises:
For the corresponding relation with correction voltage in preset identified result, obtain the acquiring unit of correction voltage corresponding to the identified result of described synchronous phase demodulation module; And
Compensate the compensating unit of the correction voltage after the output compensation for the described correction voltage that adopts described compensation correction voltage to obtain described acquiring unit;
Described compensating unit is connected with described acquiring unit.
3. atomic clock according to claim 2, is characterized in that, described execution module also comprises:
For the correction voltage after the compensation that judges the output of described compensating unit whether in preset range; Correction voltage after described compensation is in described preset range the time, exports the correction voltage after described compensation; Correction voltage after described compensation not in described preset range the time, is exported the performance element of preset correction voltage;
Described compensating unit is connected with described performance element.
4. atomic clock according to claim 3, is characterized in that, described atomic clock also comprises:
For under the effect of reference voltage, the described correction voltage after the compensation of described execution module output is carried out to digital-to-analog conversion, and the digital to analog converter of described VCXO extremely of the correction Voltage-output after change,
Described execution module is connected with described VCXO by described digital to analog converter.
5. according to the described atomic clock of claim 1-4 any one, it is characterized in that, described atomic clock also comprises:
The temperature control modules that is predetermined temperature for the temperature of working environment of controlling described atomic clock.
6. atomic clock according to claim 5, is characterized in that, described temperature control modules comprises:
Detecting unit for detection of the actual temperature of described working environment;
Actual temperature and the described predetermined temperature of the described working environment detected for more described detecting unit, obtain the comparing unit of comparative result; And
For the comparative result obtained according to described comparing unit, the regulon that is predetermined temperature by the adjustment of described working environment;
Described comparing unit is connected with described regulon with described detecting unit respectively.
7. atomic clock according to claim 6, is characterized in that, described detecting unit comprises thermistor.
8. atomic clock according to claim 6, is characterized in that, described regulon comprises Temperature Controlling Chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320313546 CN203366003U (en) | 2013-05-31 | 2013-05-31 | Atomic clock with optimized drifting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320313546 CN203366003U (en) | 2013-05-31 | 2013-05-31 | Atomic clock with optimized drifting |
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| CN203366003U true CN203366003U (en) | 2013-12-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104199274A (en) * | 2014-09-24 | 2014-12-10 | 北京市计量检测科学研究院 | Pre-estimating method for frequency modification value of rubidium clock |
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2013
- 2013-05-31 CN CN 201320313546 patent/CN203366003U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104199274A (en) * | 2014-09-24 | 2014-12-10 | 北京市计量检测科学研究院 | Pre-estimating method for frequency modification value of rubidium clock |
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Granted publication date: 20131225 Termination date: 20140531 |