CN107479358A - A kind of signal generator unit - Google Patents
A kind of signal generator unit Download PDFInfo
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- CN107479358A CN107479358A CN201710873767.9A CN201710873767A CN107479358A CN 107479358 A CN107479358 A CN 107479358A CN 201710873767 A CN201710873767 A CN 201710873767A CN 107479358 A CN107479358 A CN 107479358A
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- 238000001228 spectrum Methods 0.000 claims abstract description 15
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 5
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 235000018734 Sambucus australis Nutrition 0.000 abstract description 3
- 244000180577 Sambucus australis Species 0.000 abstract description 3
- OGFXBIXJCWAUCH-UHFFFAOYSA-N meso-secoisolariciresinol Natural products C1=2C=C(O)C(OC)=CC=2CC(CO)C(CO)C1C1=CC=C(O)C(OC)=C1 OGFXBIXJCWAUCH-UHFFFAOYSA-N 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 8
- 230000001360 synchronised effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000012937 correction Methods 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
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- 230000007704 transition Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
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- 238000010521 absorption reaction Methods 0.000 description 2
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- 230000001788 irregular Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 229910052701 rubidium Inorganic materials 0.000 description 2
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical group [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
- G04F5/14—Apparatus for producing preselected time intervals for use as timing standards using atomic clocks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
- H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
- H03L1/022—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The present invention relates to a kind of signal generator unit, including VCXO modules, radiofrequency signal generation module, quantized system and servo loop module, the frequency signal of the VCXO modules output produces microwave interrogation signals through the radiofrequency signal generation module and acts on quantized system, the quantized system produces quantum frequency discrimination signal and is delivered to servo loop module, the servo loop module produces direct current voltage control signal, and feedback effect in VCXO modules, makes its output frequency change again；The quantized system includes spectrum lamp and integrated filtering resonance bubble；Also include control sequential and module, gps signal receiver, logic gate array and high-speed shutter device occurs.Its internal module harmony of the signal generator unit of the present invention is high, and different situations are can adapt to by effective SECO.
Description
Technical field
The present invention relates to atomic clock technical field, and in particular to a kind of signal generator unit.
Background technology
In inactive type rubidium atom frequency scale, physical system is the core component of whole atomic frequency standard, and it is steady that it provides a frequency
Atomic resonance Absorption Line fixed, line width is narrower.After comprehensive modulate, the band of quartz oscillator is come from caused by electronic circuit
The microwave interrogation signals of modulation act on physical system, after quantum frequency discrimination, the place by servo circuit to quantum frequency discrimination information
Reason, most the output frequency of local oscillator is locked in the hyperfine 0-0 transition centers frequency of ground state of rubidium atom at last.It is existing most of
Servo circuit synchronizes phase demodulation according to the comprehensive synchronous phase discrimination signal provided to quantum frequency discrimination signal, and is believed according to identified result
Breath realizes that the closed loop of complete machine locks by the way of the independent voltage-controlled local oscillators of D/A, higher eventually through local oscillator output stability
Frequency signal.In today of digitlization popularization, the requirement minimized plus society to atomic clock, and GPS synchronous calibrations
Promote, harsher requirement is proposed to existing atomic clock, it is necessary to which servo-controlled links to be concentrated on to small place
Task is completed by rational SECO on reason device.But most of existing atomic clock servo circuit part is all or module
Change the situation of " individual soldier fights ".
The content of the invention
The technical problem to be solved in the present invention is：It is proposed a kind of improved signal generator unit.
The present invention is to solve the technical scheme that above-mentioned technical problem proposes to be：A kind of signal generator unit, including VCXO
Module, radiofrequency signal generation module, quantized system and servo loop module, described in the frequency signal warp of VCXO modules output
Radiofrequency signal generation module produces microwave interrogation signals and acts on quantized system, and it is defeated that the quantized system produces quantum frequency discrimination signal
Servo loop module is delivered to, the servo loop module produces direct current voltage control signal, and feedback effect in VCXO modules, makes its defeated again
Go out frequency to change；The quantized system includes spectrum lamp and integrated filtering resonance bubble；
Also include control sequential and module, gps signal receiver, logic gate array and high-speed shutter device, the gps signal occurs
To the control sequential module occurs for the signal output of receiver, and the control terminal that module occurs for the control sequential is connected respectively to
Logic gate array and the servo loop module, signal output to the control sequential of the servo loop module fill
Put, the input of the logic gate array is connected to the output end of the servo loop module, the output of the logic gate array
End occurs module feedback via the servo loop module and control sequential and controls the high-speed shutter device, the high-speed shutter
Device is suitable to by the on or off of shutter device to control the logical of light between being arranged at spectrum lamp and integrated filtering the resonance bubble
Cross or block.
Further, in addition to voltage-controlled correcting module and gain control module, the voltage-controlled correcting module and gain control
Module is successively set between the servo loop module and VCXO modules.
Further, in addition to be adapted for engagement with the temperature control modules of VCXO modules, the temperature control module contain Temperature Controlling Chip and
Thermistor, the temperature control module are placed in high stability crystal oscillator VCXO.
Further, the thermistor is located among electric bridge, and when operating ambient temperature is unchanged, electric bridge is in flat
Weighing apparatus, the temperature-compensated voltage value for being delivered to heating coil loop is 0, when operating ambient temperature changes, thermistor
Resistance will diminish or become big, then electric bridge both ends have voltage difference, are changed into temperature-compensated voltage after Temperature Controlling Chip differential amplification
Voltage source is delivered to, while exports and gives external heat wire coil loop.
The beneficial effects of the invention are as follows：
Its internal module harmony of the signal generator unit of the present invention is high, can adapt to not sympathize with by effective SECO
Condition.
Brief description of the drawings
The signal generator unit of the present invention is described further below in conjunction with the accompanying drawings.
Fig. 1 is the structured flowchart of signal generator unit in the present invention；
Fig. 2 is the signal transmission schematic diagram in logic gate array；
Fig. 3 is the signal period figure that frequency signal test side detects；
Fig. 4 is signal timing diagram caused by control sequential generation module；
Fig. 5 is GPS second pulse signal and the frequency signal timing diagram of VCXO modules output；
Fig. 6 is total timing diagram；
Fig. 7 is the electrical block diagram of temperature control modules；
Fig. 8 is the electrical block diagram of gain adjustment module.
Embodiment
Embodiment
According to Fig. 1, the signal generator unit in the present invention, including VCXO modules, radiofrequency signal generation module, amount
Subsystem and servo loop module, the frequency signal of the VCXO modules output produce microwave through the radiofrequency signal generation module
Interrogation signals act on quantized system, and the quantized system produces quantum frequency discrimination signal and is delivered to servo loop module, described to watch
Taking loop module generation direct current voltage control signal, feedback effect in VCXO modules, makes its output frequency change again；The quantum
System includes spectrum lamp and integrated filtering resonance bubble.
Also include control sequential and module, gps signal receiver, logic gate array and high-speed shutter device, the GPS occurs
To the control sequential module occurs for the signal output of signal receiver, and the control terminal that module occurs for the control sequential connects respectively
Logic gate array and the servo loop module is connected to, signal output to the control sequential of the servo loop module occurs
Device, the input of the logic gate array are connected to the output end of the servo loop module, the logic gate array it is defeated
Go out end and the module feedback control high-speed shutter device occurs via the servo loop module and control sequential, the high speed is fast
Door gear is suitable to by the on or off of shutter device to control light between being arranged at spectrum lamp and integrated filtering the resonance bubble
By or block.
Occurred on logic gate array by control sequential, produce the N number of NOT gate of odd level, its input, which receives, comes from servo
The signal of loop, the high speed Shutter that its output end is fed back in the spectrum lamp module of quantized system, to control its state
' opening ' or ' pass '.
When Fig. 1 schematic diagrams are started working, it is assumed that the high speed Shutter in this moment spectrum lamp module is ' opening ' state,
So, the light of spectrum lamp excitation is former in conventional atom frequency marking by being directly entered after high speed Shutter in integrated resonance optical filtering bubble
In the presence of reason, the quantum frequency discrimination of quantized system is completed.The signal that quantum frequency discrimination signal obtains through servo loop is sent into gate
Array, because spectrum lamp excitation light of upper moment can pass through integrated filtering resonance bubble, so the moment is through letter caused by servo loop
Number it is high level ' 1 ', becomes low level ' 0 ' after odd level logic inverter, the high speed Shutter acted in spectrum lamp module,
It is ' pass ' state.Circulate, ' 0 ' change that occurs ' 1 '-' 0 '-' 1 ' in the output end of logic gate array ..., lead to successively
Overfrequency signal detection, we can show that corresponding time parameter delivers to control sequential and module occurs.
Odd number NOT gate is produced by microprocessor to be serially connected, can produce self-oscillation, and the circuit forms a ring
Shape oscillator.It is t if the number N of NOT gate is odd number in circuit, between the mean transit delay of each gate circuit is slow, ring oscillator
Caused cycle of oscillation is T.It is assumed that the initial state of certain moment A1 point is 1, then after 1 transmission delay t, A2 points are changed into 0, then pass through
Cross 1 transmission delay t, A3 point and be changed into 1 ..., after the N number of transmission delay Nt of odd number, initial state ' 1 ' is changed into ' 0 '.Same reason：Just
State ' 0 ' is changed into ' 1 '.Signal transmission signal is as shown in Fig. 2 can obtain：
T0=2Nt（1）
After above-mentioned ring oscillator seals in atomic clock system, Fig. 3 can be obtained.
In the signal period that Fig. 3 frequency signal test side detects
T1=2(Nt+△t) （2）
Wherein, △ t are the atomic time parameter that we need to know.Pass through formula（1）With（2）, can be derived from：
△t=（T1-T0）/2 （3）
△ t in above formula are extremely important to our lower further work expansion：According to Fig. 1 it is recognised that △ t are by quantum system
System and the circuit of periphery determine, and the response time of electronic circuit is very fast, has generally also been reached more than 10nS magnitudes, institute
To determine that the key of △ t values should be the quantized system part in Fig. 1.Obtaining formula（3）In △ t after, it is delivered into control
Sequence generation module processed.
Detection produces control sequential generation module after above-mentioned time parameter △ t are obtained with each road sequential, produces three
Road clock signal：Detection, modulation, synchronous phase demodulation, as shown in Figure 4.Need to determine above-mentioned tune according to time parameter △ t herein
System, the frequency values of synchronous phase discrimination signal, and detection signal is then.Wherein：（1）, caused modulated signal
The radiofrequency signal generation module delivered in Fig. 1, for completing " comprehensive modulation " in conventional atom clock technology；（2）, it is caused with
The servo loop that the synchronous synchronous phase discrimination signal with phase of above-mentioned modulated signal is delivered in Fig. 1, for completing conventional atom clock technology
In " synchronous phase demodulation " function；（3）, the caused detection signal with above-mentioned modulation, the frequency multiplication relation of synchronous phase discrimination signal 4 deliver to figure
Servo loop in 1, the detection for aftermentioned each function sequential.
It is divided into four kinds of situations shown in Fig. 4：
1st, the frequency f of microwave interrogation signals is more than（It is less than）Atomic transition center frequency fo and within the scope of Atomic absorption line width
When, i.e. f>fo(f<Fo), unlocked frequency signal is consistent with the frequency of modulated signal in the Fig. 4 obtained through quantum frequency discrimination, simply
The difference in phase be present due to atom relaxation time and phase time delay.
2nd, when the frequency of microwave interrogation signals is equal to atomic transition center frequency, i.e. f=fo, obtained signal frequency is former
2 times of modulated signal, now atomic frequency standard is in the lock state, and the locking signal shown in Fig. 4 occurs；
3rd, when the frequency of microwave interrogation signals is significantly away from atomic transition center frequency, i.e. f is introduced into effective quantum frequency discrimination and inhaled
Within take-up wide scope, the signal obtained after processing will be a lasting level, and now atomic frequency standard is in delocking state；
4th, another special situation is exactly that spectrum lamp has the process of a relaxation oscillations, is now exported from quantized system frequency discrimination
End can detect the irregular signal waveform of high frequency, until spectrum lamp enters normal operating conditions, and entirely relaxation oscillation process
Duration is by specific complete machine cold conditions or hot determines.
For these four situations, using the detection sequential of 4 multiple-frequency modulation signalsContinuous 4 rising edges as triggering
Pulse, level sampling is carried out to the signal after quantum frequency discrimination respectively, and be recorded as D1, D2, D3, D4 respectively.
For the first situation, there are 3 low levels, 1 high level in 4 level of record.Servo loop is according to tradition
The voltage-controlled deviation correcting technology of atomic clock, the corresponding single-point direct current of voltage-controlled correcting module acquisition sent in correction voltage signal to Fig. 1 entangle
Bias-voltage acts on VCXO；
For second of situation, the level of record has relational expression：D1=D3 and D2=D4.Now servo loop will not act on
Voltage-controlled correcting module, i.e. VCXO will not be by direct current correction voltage effects；
For the third situation, the level of record has relational expression：D1=D2=D3=D4.Now servo loop will send correction electricity
The voltage-controlled correcting module in signal to Fig. 1 is pressed, voltage-controlled correcting module will obtain corresponding direct current according to preset stepped parameter and entangle
The lasting frequency sweep for acting on VCXO, realizing to VCXO of collecting voltage.
For the 4th kind of situation, because this moment spectrum lamp is in relaxation oscillation process, the signal high frequency at quantum frequency discrimination
It is irregular, in the data that multigroup continuous 4 sampling time sequence rising edges sample to obtain it is possible to that the first situation or second occurs
Kind situation or the third situation, therefore can not be judged by sampled level, the method for solution is：Due in this link, institute
What is judged is whether atomic frequency standard is in the lock state, and the 4th kind of situation substantially illustrates that atomic frequency standard is not in locking,
In the detection sequential of 4 multiple-frequency modulation signal frequencies of continuous 4 rising edges triggering, can set more than one group（On continuous 4
It is one group to rise along triggering）The judgment mode of sampling, atom frequency standard locking condition adjudgement is made respectively to multigroup obtained level that samples,
And multigroup judgement is done and computing, final lock-out state judged result is obtained, this makes it possible to solve the 4th kind of feelings well
The problem of condition is brought.Now servo loop will not act on voltage-controlled correcting module, i.e. VCXO will not be made by direct current correction voltage
With.
Corrected on GPS, according to Fig. 1, receiver obtains the signal that gps satellite is sent, and second arteries and veins is obtained after converted processing
Rush signal to deliver in control sequential generation module, the frequency signal of VCXO outputs is carried out in the range of a cycle of pulse per second (PPS)
The servo loop that corresponding correction value is delivered in Fig. 1 is counted and obtained, and corresponding direct current is exported by voltage-controlled correcting module and entangled
Collecting voltage acts on VCXO, and corresponding sequential is as shown in Figure 5.
GPS second pulse gate signal（Width is T）In high level, after the t1 times, first arteries and veins of VCXO frequency signals
The rising edge of punching, make counter Enable Pin effective, start VCXO frequency signals and count, after the T seconds, the low electricity of GPS second pulse gate
It is flat not stop counting when arriving, after the t2 times, when then and the rising edge of VCXO frequency signals that arrives arrive when count
Number device is closed.Here enable signal（Actual signal strobe）Time width, exactly equal to VCXO frequency signals complete cycle
Number.According to above-mentioned relevant parameter：T, t1, t2, N, corresponding VCXO frequencies letter can be obtained according to traditional GPS time differences comparison technology
Number correction value.Total sequential of above-mentioned 3 inventive points controls as shown in Figure 6.Enabled, low level representative is represented in figure with high level
Stop.
On temperature control modules：Contain Temperature Controlling Chip in the inside（Temperature control is used）And thermistor（Thermometric is used）.By center
Processor control can be with set temperature value T, because whole temperature control modules are placed in high stability crystal oscillator VCXO (temperature control module), institute
Corresponding operating ambient temperature can be set with central processing unit and obtain actual operating ambient temperature information.Its principle
As shown in Figure 7.Two of which R and R1 are the resistance with identical temperature coefficient, and its resistance should select suitable with Rk.Here
R1 value reflects actual working environment temperature T.Rk is a thermistor, and it is affixed on the surface of temperature control module, to perceive
Actual operating ambient temperature T.Therefore when operating ambient temperature T is unchanged, electric bridge is in balance in upper figure, is delivered to heater wire
The temperature-compensated voltage value on ring road is 0.Once operating ambient temperature T changes, then thermistor Rk resistance will diminish
（Temperature raises）Or become big（Temperature reduces）, then be present voltage difference in electric bridge both ends, be changed into after operational amplifier A differential amplification
Temperature-compensated voltage is delivered to voltage source, while exports and give traditional heating wire coil loop.The gain amplifier of whole circuit is by transporting
The negative feedback resistor Rw regulations of amplifier are calculated, Rw is a digital potentiometer, is mended by adjusting Rw resistance to reach foregoing circuit
Repay the factor and change function.
On gain adjustment module, the bridge temperature measurement module in Fig. 8 is consistent with above-mentioned described temperature control module principle.It is voltage-controlled
Bridge thermometric in module is mainly by two resistance identicals R, a preset temperature value thermistor (temperature) sensor Ro（It is determined
VCXO operating ambient temperature）And temperature-measuring thermistor Rk compositions.When VCXO operating ambient temperatures are constant, i.e. thermistor Rk
Measured value is equal with preset value Ro, and now resistance bridge A, B ends output voltage difference will be 0, whole voltage-controlled module output end Uout
Export as 0.When VCXO operating ambient temperatures change, then A, B end of bridge form certain voltage difference, by voltage with
A3, which to be delivered to, with device A1 and A2 transmission carries out differential amplification, it is contemplated that the voltage difference after amplification must effectively can gather, so
Differential amplification A3 output end adds a gain linearity regulation circuit A4.Obtained voltage difference U out and voltage-controlled correcting module
After caused voltage-controlled voltage summation, VCXO modules are delivered to.
The present invention's is not limited to above-described embodiment, and the technical scheme of above-mentioned each embodiment of the invention can be handed over each other
Fork combination forms new technical scheme, in addition all technical schemes formed using equivalent substitution, all falls within the guarantor of application claims
In the range of shield.
Claims (4)
1. a kind of signal generator unit, including VCXO modules, radiofrequency signal generation module, quantized system and servo loop mould
Block, the frequency signal of the VCXO modules output produce microwave interrogation signals through the radiofrequency signal generation module and act on quantum
System, the quantized system produce quantum frequency discrimination signal and are delivered to servo loop module, and the servo loop module produces direct current
Feedback effect in VCXO modules, makes its output frequency change to voltage control signal again；The quantized system includes spectrum lamp and collection
Into the resonance bubble that filters；
It is characterized in that：Also include control sequential and module, gps signal receiver, logic gate array and high-speed shutter device occur,
To the control sequential module occurs for the signal output of the gps signal receiver, and the control of module occurs for the control sequential
End is connected respectively to logic gate array and the servo loop module, the signal output of the servo loop module to the control
Sequential generating means, the input of the logic gate array are connected to the output end of the servo loop module, the gate
The output end of array occurs module feedback via the servo loop module and control sequential and controls the high-speed shutter device, institute
State high-speed shutter device be arranged between the spectrum lamp and integrated filtering resonance bubble be suitable to by the on or off of shutter device with
Control light by or block.
2. signal generator unit according to claim 1, it is characterised in that：Also include voltage-controlled correcting module and gain controls
Module, the voltage-controlled correcting module and gain control module are successively set between the servo loop module and VCXO modules.
3. signal generator unit according to claim 2, it is characterised in that：Also include the temperature control for being adapted for engagement with VCXO modules
Module, the temperature control module contain Temperature Controlling Chip and thermistor, and the temperature control module is placed in high stability crystal oscillator VCXO.
4. signal generator unit according to claim 3, it is characterised in that：The thermistor is located among electric bridge, when
When operating ambient temperature is unchanged, electric bridge is in balance, and the temperature-compensated voltage value for being delivered to heating coil loop is 0, works as work
When being changed as environment temperature, the resistance of thermistor will diminish or become big, then electric bridge both ends have voltage difference, through temperature control
It is changed into temperature-compensated voltage after chip differential amplification and is delivered to voltage source, while exports and give external heat wire coil loop.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710873767.9A CN107479358A (en) | 2017-09-25 | 2017-09-25 | A kind of signal generator unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710873767.9A CN107479358A (en) | 2017-09-25 | 2017-09-25 | A kind of signal generator unit |
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ID=60587015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979368A (en) * | 2017-12-20 | 2018-05-01 | 江汉大学 | The temperature control system of atomic frequency standard |
| CN109856472A (en) * | 2018-12-13 | 2019-06-07 | 江汉大学 | Catch calibrating installation in miniaturization fishpond based on multi-way detecting signal |
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| CN101055247A (en) * | 2007-05-17 | 2007-10-17 | 江汉大学 | Passive Rb atom frequency standard locking indication and fault diagnosis method |
| CN102006068A (en) * | 2010-11-30 | 2011-04-06 | 江汉大学 | Improved rubidium atom frequency scale |
| CN102291134A (en) * | 2011-06-02 | 2011-12-21 | 江汉大学 | Loop response time measuring device and method used for atomic frequency standard |
| CN104410413A (en) * | 2014-11-20 | 2015-03-11 | 江汉大学 | Atomic frequency standard frequency correction method and device and atomic frequency standard |
| CN104485948A (en) * | 2014-10-31 | 2015-04-01 | 江汉大学 | Control method for time standard equipment and time standard equipment |
| CN106849947A (en) * | 2017-01-18 | 2017-06-13 | 江汉大学 | A kind of frequency control generating means based on GPS |
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2017
- 2017-09-25 CN CN201710873767.9A patent/CN107479358A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101055247A (en) * | 2007-05-17 | 2007-10-17 | 江汉大学 | Passive Rb atom frequency standard locking indication and fault diagnosis method |
| CN102006068A (en) * | 2010-11-30 | 2011-04-06 | 江汉大学 | Improved rubidium atom frequency scale |
| CN102291134A (en) * | 2011-06-02 | 2011-12-21 | 江汉大学 | Loop response time measuring device and method used for atomic frequency standard |
| CN104485948A (en) * | 2014-10-31 | 2015-04-01 | 江汉大学 | Control method for time standard equipment and time standard equipment |
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| CN106849947A (en) * | 2017-01-18 | 2017-06-13 | 江汉大学 | A kind of frequency control generating means based on GPS |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979368A (en) * | 2017-12-20 | 2018-05-01 | 江汉大学 | The temperature control system of atomic frequency standard |
| CN107979368B (en) * | 2017-12-20 | 2021-08-31 | 江汉大学 | Temperature control system of atomic frequency standard |
| CN109856472A (en) * | 2018-12-13 | 2019-06-07 | 江汉大学 | Catch calibrating installation in miniaturization fishpond based on multi-way detecting signal |
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Application publication date: 20171215 |