CN105811973A - Passive rubidium atom frequency standard - Google Patents
Passive rubidium atom frequency standard Download PDFInfo
- Publication number
- CN105811973A CN105811973A CN201610154203.5A CN201610154203A CN105811973A CN 105811973 A CN105811973 A CN 105811973A CN 201610154203 A CN201610154203 A CN 201610154203A CN 105811973 A CN105811973 A CN 105811973A
- Authority
- CN
- China
- Prior art keywords
- module
- frequency
- outfan
- circuit
- shaping circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052701 rubidium Inorganic materials 0.000 title claims abstract description 16
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical group [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 238000007493 shaping process Methods 0.000 claims abstract description 33
- 230000010354 integration Effects 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 7
- 239000013078 crystal Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 238000002955 isolation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The invention relates to the technical field of an atom frequency standard, and especially relates to a passive rubidium atom frequency standard. The passive rubidium atom frequency standard comprises a user terminal module, a comprehensive module, and a voltage controlled crystal oscillator, an isolation amplifier, a radio frequency doubling module, a microwave frequency doubling module, a physical unit and a servo circuit which are successively and electrically connected. The servo circuit comprises a shaping circuit module, a phase detection module, an integration circuit, an analog to digital converter and a data processing module which are successively and electrically connected. The physical unit is electrically connected with the alternating current output end of the comprehensive module and the input end of the shaping circuit module; the output end of the data processing module and the output end of the radio frequency doubling module are both electrically connected with the user terminal module. The servo circuit inputs the frequency stability of the frequency standard to the user terminal module, thus enabling the user to know the working state stability of the frequency standard conveniently. Moreover, according to the comprehensive module, a traditional capacitance-variable diode modulation circuit is replaced by a direct digital frequency synthesizer; and the atom frequency standard has relatively high stability without being influenced by the temperature.
Description
Technical field
The present invention relates to Technology of Atomic Frequency Standards field, particularly relate to a kind of inactive type rubidium atom frequency scale.
Background technology
Traditional inactive type rubidium atom frequency scale is made up of physical location and electronic circuit two large divisions, and wherein physical location includes the composition such as spectral lamp, integrated filtering resonance bubble, microwave cavity, photodetector, C field, magnetic cup；Electronic circuit includes integration module, VCXO, isolated amplifier, radio frequency times frequency module, microwave multiple-frequency module and servo circuit etc..Physical system provides quantum frequency discrimination benchmark, and electronic circuit provides microwave interrogation signals and frequency locking function, is locked on the Atomic Absorption peak of physical system by the output frequency of VCXO.
Atomic frequency standard be widely used in the location of satellite, navigation and communicate, the field such as instrument and meter and astronomy, this is accomplished by atomic frequency standard all higher precision and degree of stability, the degree of stability of its duty can not be monitored by traditional atomic frequency standard, is unfavorable for the maintenance of atomic frequency standard.Additionally, due to have employed capister modulation circuit in tradition rubidium frequency standard, capister is temperature sensing element, and when variation of ambient temperature, the amplitude inevitably resulting in square wave frequency modulation changes, thus affecting the degree of stability of rubidium frequency standard.
Summary of the invention
It is an object of the invention to provide a kind of inactive type rubidium atom frequency scale, it has a good degree of stability, and is easy to user's degree of stability to its duty and is monitored.
nullThe technical scheme is that a kind of inactive type rubidium atom frequency scale，Including integration module and the VCXO that is sequentially connected electrically、Isolated amplifier、Radio frequency times frequency module、Microwave multiple-frequency module、Physical location and servo circuit，Described servo circuit outfan is connected with VCXO，The input of described integration module is connected with isolated amplifier outfan，The outfan of integration module is connected with radio frequency times frequency module and servo circuit respectively，Also include the user terminal module for showing frequency marking relevant information、The first wireless communication module and the second wireless communication module for radio communication，Described servo circuit includes the shaping circuit module being sequentially connected electrically、Phase detecting module、Integrating circuit、Analog-digital converter and data processing module，The AC signal outfan of described physical location and integration module electrically connects with shaping circuit module input，The outfan of described isolated amplifier and the outfan of data processing module are connected with user terminal module respectively through the first wireless communication module and the second wireless communication module.
Further, described shaping circuit module includes the first shaping circuit and the second shaping circuit, the AC signal outfan of described integration module and the electrical connection of the first shaping circuit input, the AC signal outfan of described physical location and the electrical connection of the second shaping circuit input, described first shaping circuit and the second shaping circuit outfan all electrically connect with phase detecting module.
Further, described integration module includes the phase accumulator, Direct Digital Synthesizer and the low pass filter that are sequentially connected with, the input of described phase accumulator is connected with keying FM signal outfan and setpoint frequency signal output part, the clock signal input terminal of described Direct Digital Synthesizer is connected with VCXO clock signal output terminal, and described low pass filter outfan is connected with radio frequency times frequency module and servo circuit respectively.
Further, described physical location includes integrated filtering resonance bubble, is filled with buffer gas in described integrated filtering resonance bubble.
Further, described Direct Digital Synthesizer adopts AD9832 chip.
The invention has the beneficial effects as follows: the two-way AC signal that integration module and physical location light cell produce, respectively through shaping circuit shaping, obtain along reasonable burst pulse, it is then fed into phase detecting circuit and carries out phase demodulation, obtain the pulse signal of corresponding two signal phase differences, corresponding DC voltage is become through integration, a series of frequency difference Value Data can be obtained after analog digital conversion and data process, such that it is able to calculate frequency stability, the frequency stability of frequency marking is sent to user terminal module by wireless communication module, user can be facilitated to understand the stable working state degree of frequency marking, long-range monitoring can also be realized simultaneously, even if user is not at the scene, also will appreciate that the enforcement operating mode of frequency marking.It addition, integration module adopts Direct Digital Synthesizer to replace traditional capister modulation circuit, it is not influenced by temperature so that atomic frequency standard has higher degree of stability.
Accompanying drawing explanation
Fig. 1 is catenation principle block diagram of the present invention；
Fig. 2 is servo circuit internal module annexation figure；
Fig. 3 is the internal sequential chart of servo circuit；
Fig. 4 is the internal annexation figure of integration module；
In figure: 1 VCXO, 2 isolated amplifiers, 3 radio frequency times frequency modules, 4 microwave multiple-frequency modules, 5 physical locations, 6 servo circuits, 601a the first shaping circuit, 601b the second shaping circuit, 602 phase detecting module, 603 integrating circuit, 604 analog-digital converters, 605 data processing modules, 7 synthetic circuits, 701 phase accumulators, 702 memorizeies, 703 digital to analog converters, 704 low pass filters, 8 user terminal modules., 9 first wireless communication modules, 10 second wireless communication modules.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.As long as just can be mutually combined additionally, technical characteristic involved in each embodiment of invention described below does not constitute conflict each other.
As it is shown in figure 1, the inactive type rubidium atom frequency scale that the present invention adopts includes integration module 7, user terminal module the 8, first wireless communication module the 9, second wireless communication module 10 and the VCXO 1 being sequentially connected electrically, isolated amplifier 2, radio frequency times frequency module 3, microwave multiple-frequency module 4, physical location 5 and servo circuit 6.Spectral lamp, integrated filtering resonance bubble, microwave cavity, photodetector, C field, magnetic cup etc. is included again in physical location 5.Greatly reducing for making Doppler widen, be filled with buffer gas in integrated filtering resonance bubble, the buffer gas being filled with in the present embodiment is usually noble gas or makes the non-inert gas of elastic collision with 87Rb atom.
As in figure 2 it is shown, servo circuit 6 includes the shaping circuit module, phase detecting module 602, integrating circuit 603, analog-digital converter 604 and the data processing module 605 that are sequentially connected electrically.Shaping circuit module includes again the first shaping circuit 601a and the second shaping circuit 601b.Wherein, the AC signal outfan of integration module 7 and the electrical connection of the first shaping circuit 601a input, the photronic AC signal outfan of described physical location 5 and the electrical connection of the second shaping circuit 601b input, the first shaping circuit 601a and the second shaping circuit 601b outfan all electrically connect 602 with phase detecting module.
It is illustrated in figure 3 servo circuit 7 and processes the signal timing diagram of front and back.Integration module 7 and physical location 5 light cell output two-way AC signal process to shaping circuit module, obtain along reasonable burst pulse, it is then fed in phase detecting module 602 and carries out phase demodulation process, obtain the pulse signal of corresponding two signal phase differences, through a few divisional processing of integrating circuit, become corresponding DC voltage, this DC voltage is carried out analog digital conversion, finally carry out data process, it is possible to obtain the stability of correction voltage and frequency.Correction voltage is sent to VCXO 1, the frequency stability of frequency marking is sent to user terminal module 8 by the second wireless communication module 10, simultaneously, isolated amplifier 2 outputs it signal by the first wireless communication module 9 and is sent to user terminal module 8, and user can be allowed to understand the steadiness of current atom frequency marking complete machine.User terminal module 8 can be mobile phone, panel computer, laptop computer etc., and user can realize the long-range monitoring to frequency marking, even if user is not at the scene, also will appreciate that the enforcement operating mode of frequency marking.
Concrete integration details is as follows: the present embodiment is sampled as example with 8 analog-digital converters 604, the numerical range that it can represent on digital signal is 0-255, generally may require that user gives a calibration value (such as 122) before testing, it is used for defining analog digital conversion digital signal value corresponding during 0 degree of phase place, and the analog digital conversion digital signal value corresponding to phase value that can readily calculate out corresponding-1800 ,+1800 accordingly is 61 and 186.If so defining, then minimum resolution about about 30.With the calibration value 122 of this analog-digital converter, acquisition time is 10 seconds is example, calculates and once need 1000 data in actual samples process.We take collection data in the 1st, the 101st, the 201st ... voltage value Vi, it is translated into phase valueConcrete conversion formula is:
Wherein N is 3600 complete number of cycles, V in 1000 data of i-thiThe analog digital conversion numerical value (having positive and negative dividing) corresponding to the i-th-1 1000 data moment, φ is deducted for 1000 data moment of i-thiBe total phase value that 1000 data moment of required i-th experience, then 1000 data time difference frequencies of i-th are according to fiFor:
In the method, it is possible to obtain a series of frequency difference Value Data fi.There is corresponding fiValue, is substituted into below equation and is calculated frequency stability, and result is delivered to user terminal module 8, user can be allowed to understand current atom frequency marking complete machine stability situation:
Wherein τ is sample time, fiProcess the frequency-splitting obtained for above-mentioned data, m is pendulous frequency.
It is illustrated in figure 4 the inside annexation figure of integration module 7.Integration module 7 is mainly made up of the phase accumulator 701 being sequentially connected with, Direct Digital Synthesizer and low pass filter 704.Wherein the Direct Digital Synthesizer in the present embodiment adopts AD9832 chip, and it includes memorizer 702 and digital to analog converter 703.The reference source of Direct Digital Synthesizer is the frequency signal that isolated amplifier 2 inputs to integration module 7.The input input of phase accumulator 701 has keying FM signal (i.e. 79HZ modulated square wave signal) and frequency setting signal.Phase accumulator 701 exports two frequency value F 0, F1 is saved in memorizer 702, when the FSELECT port of AD9832 chip has square-wave signal to input (level rising edge or trailing edge conversion), the IOUT end of AD9832 chip will read the value of F1 or F0 therewith respectively as output from memorizer 702, and the phase place of signal can be kept unchanged.Owing to the digital to analog converter 703 of AD9832 chip is converted to several more, further increase the quality of output signal.And make an uproar mutually to improve, suppress the technical specification such as spuious, the present embodiment accesses low pass filter 704 and exports below.
The above, be only the specific embodiment of the present invention, it is noted that any those of ordinary skill in the art in the technical scope that disclosed herein, the change that can readily occur in or replacement, all should be encompassed within protection scope of the present invention.
Claims (5)
- null1. an inactive type rubidium atom frequency scale，Including integration module (7) and the VCXO (1) that is sequentially connected electrically、Isolated amplifier (2)、Radio frequency times frequency module (3)、Microwave multiple-frequency module (4)、Physical location (5) and servo circuit (6)，Described servo circuit (6) outfan is connected with VCXO (1)，The input of described integration module (7) is connected with isolated amplifier (2) outfan，The outfan of integration module (7) is connected with radio frequency times frequency module (3) and servo circuit (6) respectively，It is characterized in that: also include the user terminal module (8) for showing frequency marking relevant information、The first wireless communication module (9) and the second wireless communication module (10) for radio communication，Described servo circuit (6) includes the shaping circuit module being sequentially connected electrically、Phase detecting module (602)、Integrating circuit (603)、Analog-digital converter (604) and data processing module (605)，The AC signal outfan of described physical location (5) and integration module (7) electrically connects with shaping circuit module input，The outfan of described isolated amplifier (2) and the outfan of data processing module (605) are connected with user terminal module (8) respectively through the first wireless communication module (9) and the second wireless communication module (10).
- 2. a kind of inactive type rubidium atom frequency scale as claimed in claim 1, it is characterized in that: described shaping circuit module includes the first shaping circuit (601a) and the second shaping circuit (601b), the AC signal outfan of described integration module (7) and the electrical connection of the first shaping circuit (601a) input, the AC signal outfan of described physical location (5) and the electrical connection of the second shaping circuit (601b) input, described first shaping circuit (601a) and the second shaping circuit (601b) outfan all electrically connect with phase detecting module (602).
- 3. a kind of inactive type rubidium atom frequency scale as claimed in claim 1, it is characterized in that: described integration module (7) includes the phase accumulator (701) being sequentially connected with, Direct Digital Synthesizer and low pass filter (704), the input of described phase accumulator (701) is connected with keying FM signal outfan and setpoint frequency signal output part, the clock signal input terminal of described Direct Digital Synthesizer is connected with VCXO clock signal output terminal, described low pass filter (704) outfan is connected with radio frequency times frequency module (3) and servo circuit (6) respectively.
- 4. a kind of inactive type rubidium atom frequency scale as claimed in claim 1, it is characterised in that: described physical location (5) includes integrated filtering resonance bubble, is filled with buffer gas in described integrated filtering resonance bubble.
- 5. a kind of inactive type rubidium atom frequency scale as claimed in claim 3, it is characterised in that: described Direct Digital Synthesizer adopts AD9832 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610154203.5A CN105811973B (en) | 2016-03-17 | 2016-03-17 | A kind of inactive type rubidium atom frequency scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610154203.5A CN105811973B (en) | 2016-03-17 | 2016-03-17 | A kind of inactive type rubidium atom frequency scale |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105811973A true CN105811973A (en) | 2016-07-27 |
| CN105811973B CN105811973B (en) | 2018-10-16 |
Family
ID=56453273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610154203.5A Expired - Fee Related CN105811973B (en) | 2016-03-17 | 2016-03-17 | A kind of inactive type rubidium atom frequency scale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105811973B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115128936A (en) * | 2022-06-01 | 2022-09-30 | 西安空间无线电技术研究所 | Phase detection and integration device and method for digital servo of rubidium atomic clock |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619967A (en) * | 2004-11-30 | 2005-05-25 | 中国科学院武汉物理与数学研究所 | Method of dominant combination in passive atomic frequency scale system and its device |
| CN200993665Y (en) * | 2006-11-30 | 2007-12-19 | 江汉大学 | Small digitalized prase-comparing measuring device |
| CN102435842A (en) * | 2011-09-20 | 2012-05-02 | 武汉理工大学 | Device for comparing double-mode frequency scales and measuring frequency stability |
| CN103297047A (en) * | 2013-05-29 | 2013-09-11 | 江汉大学 | Atomic frequency standard and servo locking method |
| CN205490488U (en) * | 2016-03-17 | 2016-08-17 | 江汉大学 | By ejector half rubidium atomic frequency standard |
-
2016
- 2016-03-17 CN CN201610154203.5A patent/CN105811973B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619967A (en) * | 2004-11-30 | 2005-05-25 | 中国科学院武汉物理与数学研究所 | Method of dominant combination in passive atomic frequency scale system and its device |
| CN200993665Y (en) * | 2006-11-30 | 2007-12-19 | 江汉大学 | Small digitalized prase-comparing measuring device |
| CN102435842A (en) * | 2011-09-20 | 2012-05-02 | 武汉理工大学 | Device for comparing double-mode frequency scales and measuring frequency stability |
| CN103297047A (en) * | 2013-05-29 | 2013-09-11 | 江汉大学 | Atomic frequency standard and servo locking method |
| CN205490488U (en) * | 2016-03-17 | 2016-08-17 | 江汉大学 | By ejector half rubidium atomic frequency standard |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115128936A (en) * | 2022-06-01 | 2022-09-30 | 西安空间无线电技术研究所 | Phase detection and integration device and method for digital servo of rubidium atomic clock |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105811973B (en) | 2018-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103293376B (en) | A kind of measuring method of frequency stability and device | |
| CN101984559B (en) | Method for improving accuracy of standard frequency of rubidium atoms | |
| CN203377841U (en) | Satellite-based crystal oscillator taming apparatus for time service | |
| CN105049040B (en) | A kind of method that Atomic Clocks Based on Coherent Population Trapping output frequency is corrected using GNSS | |
| US10534321B2 (en) | CPT atomic clock servo control SoC | |
| CN102006068A (en) | Improved rubidium atom frequency scale | |
| CN104485954A (en) | Control method for time equipment and time equipment | |
| CN105629061A (en) | Precise frequency measurement device based on high-stability wide reference pulse | |
| CN107493102A (en) | A kind of new method to the processing of passive-type atomic clock digitalized locked phase | |
| CN203587688U (en) | A frequency stability measurement apparatus | |
| CN105182069A (en) | High resolution group quantization phase processing method under pilot frequency architecture | |
| CN105021904B (en) | A kind of fast phase noise measurement system and measuring method based on DDS phase shift technologies | |
| CN102201811B (en) | Method and device for reducing microwave power frequency shift of atomic frequency standard | |
| CN110716092B (en) | Phase noise measuring device and measuring method based on laser frequency discrimination and cross-correlation processing | |
| CN105892280A (en) | Satellite time service device | |
| Sandenbergh et al. | A common view GPSDO to synchronize netted radar | |
| CN205490488U (en) | By ejector half rubidium atomic frequency standard | |
| CN105811973A (en) | Passive rubidium atom frequency standard | |
| CN108398658A (en) | A kind of automatic frequency control apparatus and method | |
| CN107733369A (en) | Temperature compensating crystal oscillator | |
| CN104090163B (en) | A kind of high stability, high-precision phase amplitude detection device | |
| CN103326717B (en) | A kind of rubidium clock scan capture secondary locking method | |
| CN203166876U (en) | Miniaturized atomic frequency standard | |
| CN202758005U (en) | SNR measuring device used for atomic clock | |
| CN102147435B (en) | Method for measuring line width and frequency discrimination slope of physical system of Rubidium atom frequency scale |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181016 |