CN107979368A - The temperature control system of atomic frequency standard - Google Patents
The temperature control system of atomic frequency standard Download PDFInfo
- Publication number
- CN107979368A CN107979368A CN201711383388.8A CN201711383388A CN107979368A CN 107979368 A CN107979368 A CN 107979368A CN 201711383388 A CN201711383388 A CN 201711383388A CN 107979368 A CN107979368 A CN 107979368A
- Authority
- CN
- China
- Prior art keywords
- temperature
- temperature control
- frequency standard
- voltage
- atomic frequency
- 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
- 239000013078 crystal Substances 0.000 claims abstract description 34
- 238000007689 inspection Methods 0.000 claims abstract description 10
- 230000003321 amplification Effects 0.000 claims abstract description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 7
- 238000007493 shaping process Methods 0.000 claims abstract description 5
- 230000001360 synchronised effect Effects 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 13
- 230000005669 field effect Effects 0.000 claims description 9
- 239000012774 insulation material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 230000005283 ground state Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- 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
- H03L1/04—Constructional details for maintaining temperature constant
-
- 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 discloses a kind of temperature control system of atomic frequency standard, belong to Technology of Atomic Frequency Standards field.The atomic frequency standard includes voltage controlled crystal oscillator, electronic circuit, physical system and servo module；The voltage controlled crystal oscillator is used to export original frequency signal；The electronic circuit is used to carry out frequency multiplication and mixing to the original frequency signal, produces microwave interrogation signals；The physical system is used to carry out frequency discrimination to the microwave interrogation signals, produces light inspection signal；The servo module is used to carry out the light inspection signal frequency-selecting amplification, square wave shaping and synchronous phase demodulation, produces correction voltage and acts on the voltage controlled crystal oscillator, to adjust the output frequency of the voltage controlled crystal oscillator；The temperature control system includes：Amplifying circuit, for being amplified to the correction voltage, produces temperature control voltage；Temperature-compensation circuit, under the driving of the temperature control voltage, adjusting the environment temperature of the atomic frequency standard.Environment temperature can be adjusted to the preference temperature of work by the present invention.
Description
Technical field
The present invention relates to Technology of Atomic Frequency Standards field, more particularly to a kind of temperature control system of atomic frequency standard.
Background technology
Atomic frequency standard is to provide standard frequency and the equipment of time.Rb atom frequency marking because of it with small, low-power consumption and
The ability of preferable anti-adverse environment, and become a kind of most widely used atomic frequency standard.It has preferable index, energy at the same time
Meet the needs of most dual-use engineerings, be particularly used in early warning plane, opportunity of combat, electronic countermeasure, the third generation and move and lead to
Believe the engineering field such as technical network and power monitoring.
Existing atomic frequency standard includes voltage controlled crystal oscillator, physical system, electronic circuit and servo module.Wherein, voltage-controlled crystalline substance
Shake for exporting original frequency signal；Electronic circuit is used to carry out frequency multiplication and mixing to original frequency signal, produces microwave and inquires after
Signal；Physical system is used to carry out frequency discrimination to microwave interrogation signals, produces light inspection signal；Servo module be used for light inspection signal into
Row frequency-selecting amplification, square wave shaping and synchronous phase demodulation, produce correction voltage and act on voltage controlled crystal oscillator, to adjust voltage controlled crystal oscillator
Output frequency；By said structure unit, most the output frequency of voltage controlled crystal oscillator is locked in atomic ground state hyperfine 0-0 centers at last
In frequency.
In the implementation of the present invention, inventor has found that the prior art has at least the following problems：
Since voltage controlled crystal oscillator is highly susceptible to the influence of temperature change, and microwave times frequency mixing module, integration module, servo
The performance indicator of module and voltage controlled crystal oscillator is to match, therefore, when the temperature varies, the output signal frequency of voltage controlled crystal oscillator
It can occur to change on a large scale, and then lead to not the output frequency of voltage controlled crystal oscillator being locked in atomic ground state hyperfine 0-0
On frequency of heart.
The content of the invention
In order to solve problem of the prior art, an embodiment of the present invention provides a kind of temperature control system of atomic frequency standard.It is described
Technical solution is as follows：
An embodiment of the present invention provides a kind of temperature control system of atomic frequency standard, the atomic frequency standard includes voltage controlled crystal oscillator, electricity
Sub-line road, physical system and servo module；The voltage controlled crystal oscillator is used to export original frequency signal；The electronic circuit is used
In carrying out frequency multiplication and mixing to the original frequency signal, microwave interrogation signals are produced；The physical system is used for described micro-
Ripple interrogation signals carry out frequency discrimination, produce light inspection signal；The servo module is used to carry out frequency-selecting amplification, side to the light inspection signal
Ripple shaping and synchronous phase demodulation, produce correction voltage and act on the voltage controlled crystal oscillator, to adjust the output of voltage controlled crystal oscillator frequency
Rate；
The temperature control system includes：
Amplifying circuit, for being amplified to the correction voltage, produces temperature control voltage；
Temperature-compensation circuit, under the driving of the temperature control voltage, adjusting the environment temperature of the atomic frequency standard.
Alternatively, the temperature-compensation circuit includes：
The first branch, for when the temperature control voltage is more than 0, raising the environment temperature of the atomic frequency standard；
The second branch, for when the temperature control voltage is less than 0, reducing the environment temperature of the atomic frequency standard.
Preferably, the first branch is equipped with the first diode and heating coil, and the second branch is equipped with second
The anode of diode and cooling fan, the cathode of first diode and second diode respectively with the amplifying circuit
Connection, the anode of first diode are connected with the heating coil, the cathode of second diode and the cooling wind
Fan connection.
Alternatively, the temperature-compensation circuit includes：
Bridge rectifier, for the temperature control voltage to be adjusted to forward voltage；
The first branch, under the driving of the forward voltage, raising the environment temperature of the atomic frequency standard；
The second branch, under the driving of the forward voltage, reducing the environment temperature of the atomic frequency standard；
Selector, for the atomic frequency standard environment temperature be less than the atomic frequency standard operating temperature when, by institute
Forward voltage is stated to act in the first branch；It is more than the work of the atomic frequency standard in the environment temperature of the atomic frequency standard
During temperature, the forward voltage is acted in the second branch.
Preferably, the selector includes：
Temperature sensor, for measuring the environment temperature of the atomic frequency standard；
Comparator, for the environment temperature of the atomic frequency standard and the operating temperature of the atomic frequency standard to be contrasted,
And according to comparing result output control signal；
Relay, for the forward voltage to be acted on the first branch and described according to control signal selection
On one in the second branch.
Preferably, the first branch is equipped with heating coil, and the second branch is equipped with cooling fan, the heating
Coil and the cooling fan are connected with the relay respectively.
Alternatively, the amplifying circuit includes triode, and the base stage of the triode is connected with the servo module, described
The collector of triode is connected with the temperature-compensation circuit.
Alternatively, the amplifying circuit includes field-effect tube, and the grid of the field-effect tube is connected with the servo module,
The drain electrode of the field-effect tube is connected with the temperature-compensation circuit.
Alternatively, the temperature control system further includes babinet, and the atomic frequency standard and the temperature control system are arranged on the case
In vivo.
Preferably, the babinet is made of thermal insulation material.
The beneficial effect that technical solution provided in an embodiment of the present invention is brought is：
Due to voltage controlled crystal oscillator variation of ambient temperature when, the output frequency of voltage controlled crystal oscillator may also change accordingly, and voltage-controlled crystalline substance
The correction voltage swing positive correlation that the change size of the output frequency to shake is produced with servo module, therefore when the environment of voltage controlled crystal oscillator
During temperature change, servo module can produce corresponding correction voltage.The embodiment of the present invention is by being amplified correction voltage
To temperature control voltage, and under the driving of temperature control voltage adjust atomic frequency standard environment temperature so that according to correction voltage size
The corresponding environment temperature for adjusting atomic frequency standard, makes the environment temperature of atomic frequency standard be adjusted to the preference temperature of atomic frequency standard work,
The output frequency of voltage controlled crystal oscillator can be locked in atomic ground state hyperfine 0-0 centre frequencies by atomic frequency standard.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of structure diagram of atomic frequency standard provided in an embodiment of the present invention；
Fig. 2 is a kind of structure diagram of the temperature control system of atomic frequency standard provided in an embodiment of the present invention；
Fig. 3 is a kind of structure diagram of implementation of temperature-compensation circuit provided in an embodiment of the present invention；
Fig. 4 is the structure diagram of another implementation of temperature-compensation circuit provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment
An embodiment of the present invention provides a kind of temperature control system of atomic frequency standard, Fig. 1 is the structure diagram of atomic frequency standard, is joined
See Fig. 1, atomic frequency standard includes voltage controlled crystal oscillator 11, electronic circuit 12, physical system 13 and servo module 14.
Wherein, voltage controlled crystal oscillator 11, for exporting original frequency signal；
Electronic circuit 12, for carrying out frequency multiplication and mixing to original frequency signal, produces microwave interrogation signals；
Physical system 13, for carrying out frequency discrimination to microwave interrogation signals, produces light inspection signal；
Servo module 14, for carrying out frequency-selecting amplification, square wave shaping and synchronous phase demodulation to light inspection signal, produces correction
Voltage acts on voltage controlled crystal oscillator, to adjust the output frequency of voltage controlled crystal oscillator.
Fig. 2 is the structure diagram of temperature control system, and referring to Fig. 2, temperature control system includes amplifying circuit 21 and temperature-compensating electricity
Road 22.
Wherein, amplifying circuit 21, for being amplified to correction voltage, produce temperature control voltage；
Temperature-compensation circuit 22, under the driving of temperature control voltage, adjusting the environment temperature of atomic frequency standard.
Due to voltage controlled crystal oscillator variation of ambient temperature when, the output frequency of voltage controlled crystal oscillator may also change accordingly, and voltage-controlled crystalline substance
The correction voltage swing positive correlation that the change size of the output frequency to shake is produced with servo module, therefore when the environment of voltage controlled crystal oscillator
During temperature change, servo module can produce corresponding correction voltage.The embodiment of the present invention is by being amplified correction voltage
To temperature control voltage, and under the driving of temperature control voltage adjust atomic frequency standard environment temperature so that according to correction voltage size
The corresponding environment temperature for adjusting atomic frequency standard, makes the environment temperature of atomic frequency standard be adjusted to the preference temperature of atomic frequency standard work,
The output frequency of voltage controlled crystal oscillator can be locked in atomic ground state hyperfine 0-0 centre frequencies by atomic frequency standard.
Fig. 3 is a kind of structure diagram of implementation of temperature-compensation circuit, referring to Fig. 3, in one kind of the present embodiment
In implementation, temperature-compensation circuit 22 can include：
The first branch 221, for when temperature control voltage is more than 0, raising the environment temperature of atomic frequency standard；
The second branch 222, for when temperature control voltage is less than 0, reducing the environment temperature of atomic frequency standard.
Specifically, as shown in Fig. 2, the first diode 221a and heating coil 221b can be equipped with the first branch 221, the
The second diode 222a and cooling fan 222b, the cathode and the two or two of the first diode 221a can be equipped with two branches 222
The anode of pole pipe 222a is connected with amplifying circuit 21 respectively, and the anode of the first diode 221a is connected with heating coil 221b, the
The cathode of two diode 222a is connected with cooling fan 222b.
Specific implementation when, if the environment temperature of atomic frequency standard be less than atomic frequency standard operating temperature (atomic frequency standard
Operating temperature refers to the preference temperature of atomic frequency standard work, such as 25 DEG C in the present embodiment), then the output frequency of voltage controlled crystal oscillator is less than
Atomic ground state hyperfine 0-0 centre frequencies, servo module produce the correction voltage more than 0.Due to the one-way conduction of diode,
The first diode 221a is turned at this time, and the second diode 222a cut-offs, i.e., the first branch 221 turns on, and the second branch 222 is ended,
The temperature control voltage that correction voltage amplification obtains is acted on heating coil 221b, raises the environment temperature of atomic frequency standard.
If the environment temperature of atomic frequency standard is more than the operating temperature of atomic frequency standard, the output frequency of voltage controlled crystal oscillator is higher than
Atomic ground state hyperfine 0-0 centre frequencies, servo module generate less than 0 correction voltage.Due to the one-way conduction of diode,
The first diode 221a ends at this time, and the second diode 222a conductings, i.e., the first branch 221 is ended, and the second branch 222 turns on,
The temperature control voltage that correction voltage amplification obtains is acted on cooling fan 222b, reduces the environment temperature of atomic frequency standard.
Fig. 4 is the structure diagram of another implementation of temperature-compensation circuit, referring to Fig. 4, in the another of the present embodiment
In a kind of implementation, temperature-compensation circuit 22 can include：
Bridge rectifier 223, for temperature control voltage to be adjusted to forward voltage；
The first branch 224, under the driving of forward voltage, raising the environment temperature of atomic frequency standard；
The second branch 225, under the driving of forward voltage, reducing the environment temperature of atomic frequency standard；
Selector 226, for atomic frequency standard environment temperature be less than atomic frequency standard operating temperature when, by forward voltage
Act in the first branch 224；When the environment temperature of atomic frequency standard is more than the operating temperature of atomic frequency standard, forward voltage is made
With in the second branch 225.
Wherein, the operating temperature of atomic frequency standard refers to the temperature of atomic frequency standard normal work, i.e., atomic frequency standard work is suitable
Suitable temperature, such as 25 DEG C.If the operating temperature of atomic frequency standard is a temperature range, the operating temperature less than atomic frequency standard is
Refer to, less than the minimum value in this temperature range；Operating temperature more than atomic frequency standard refers to, more than in this temperature range
Maximum.
Specifically, as shown in figure 3, selector 226 can include：
Temperature sensor 226a, for measuring the environment temperature of atomic frequency standard；
Comparator 226b, for the operating temperature of the environment temperature of atomic frequency standard and atomic frequency standard to be contrasted, and root
According to comparing result output control signal；
Relay 226c, for selecting to act on forward voltage in the first branch and the second branch according to control signal
On one.
Specifically, can be with as shown in figure 3, heating coil 224a can be equipped with the first branch 224, in the second branch 225
Equipped with cooling fan 225a, heating coil 224a and cooling fan 225a are connected with relay 226c respectively.
In specific implementation, no matter temperature control voltage is also less than 0 more than 0, and bridge rectifier 223 can ensure to export
Forward voltage more than 0.
If the environment temperature of the atomic frequency standard of temperature sensor 226a measurements is less than the operating temperature of atomic frequency standard, compare
Device 226b controls relay 226c connects bridge rectifier 223 with the first branch 224, and forward voltage acts on heating coil
On 224a, the environment temperature of atomic frequency standard is raised.
If the environment temperature of the atomic frequency standard of temperature sensor 226a measurements is more than the operating temperature of atomic frequency standard, compare
Device 226b controls relay 226c connects bridge rectifier 223 with the second branch 225, and forward voltage acts on cooling fan
On 225a, the environment temperature of atomic frequency standard is reduced.
Alternatively, amplifying circuit 21 can include triode, and the base stage of triode is connected with servo module, the collection of triode
Electrode is connected with temperature-compensation circuit.
Alternatively, amplifying circuit 21 can include field-effect tube, and the grid of field-effect tube is connected with servo module, field-effect
The drain electrode of pipe is connected with temperature-compensation circuit.
Alternatively, temperature control system can also include babinet, and atomic frequency standard and temperature control system are arranged in babinet, to improve temperature
Spend the regulating effect of compensation circuit.
Preferably, babinet can be made of thermal insulation material, such as foam.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of temperature control system of atomic frequency standard, the atomic frequency standard include voltage controlled crystal oscillator, electronic circuit, physical system and
Servo module；The voltage controlled crystal oscillator is used to export original frequency signal；The electronic circuit is used for the original frequency signal
Frequency multiplication and mixing are carried out, produces microwave interrogation signals；The physical system is used to carry out the microwave interrogation signals frequency discrimination, production
Raw light inspection signal；The servo module is used to carry out the light inspection signal frequency-selecting amplification, square wave shaping and synchronous phase demodulation,
Produce correction voltage and act on the voltage controlled crystal oscillator, to adjust the output frequency of the voltage controlled crystal oscillator；
It is characterized in that, the temperature control system includes：
Amplifying circuit, for being amplified to the correction voltage, produces temperature control voltage；
Temperature-compensation circuit, under the driving of the temperature control voltage, adjusting the environment temperature of the atomic frequency standard.
2. temperature control system according to claim 1, it is characterised in that the temperature-compensation circuit includes：
The first branch, for when the temperature control voltage is more than 0, raising the environment temperature of the atomic frequency standard；
The second branch, for when the temperature control voltage is less than 0, reducing the environment temperature of the atomic frequency standard.
3. temperature control system according to claim 2, it is characterised in that the first branch is equipped with the first diode and adds
Heat coil, the second branch are equipped with the second diode and cooling fan, the cathode of first diode and described second
The anode of diode is connected with the amplifying circuit respectively, and the anode of first diode is connected with the heating coil, institute
The cathode for stating the second diode is connected with the cooling fan.
4. temperature control system according to claim 1, it is characterised in that the temperature-compensation circuit includes：
Bridge rectifier, for the temperature control voltage to be adjusted to forward voltage；
The first branch, under the driving of the forward voltage, raising the environment temperature of the atomic frequency standard；
The second branch, under the driving of the forward voltage, reducing the environment temperature of the atomic frequency standard；
Selector, for the atomic frequency standard environment temperature be less than the atomic frequency standard operating temperature when, by it is described just
Acted on to voltage in the first branch；It is more than the operating temperature of the atomic frequency standard in the environment temperature of the atomic frequency standard
When, the forward voltage is acted in the second branch.
5. temperature control system according to claim 4, it is characterised in that the selector includes：
Temperature sensor, for measuring the environment temperature of the atomic frequency standard；
Comparator, for the environment temperature of the atomic frequency standard and the operating temperature of the atomic frequency standard to be contrasted, and root
According to comparing result output control signal；
Relay, for being selected the forward voltage acting on the first branch and described second according to the control signal
On one in branch.
6. temperature control system according to claim 4, it is characterised in that the first branch is equipped with heating coil, described
The second branch is equipped with cooling fan, and the heating coil and the cooling fan are connected with the relay respectively.
7. according to claim 1~6 any one of them temperature control system, it is characterised in that the amplifying circuit includes triode,
The base stage of the triode is connected with the servo module, and the collector of the triode is connected with the temperature-compensation circuit.
8. according to claim 1~6 any one of them temperature control system, it is characterised in that the amplifying circuit includes field-effect
Pipe, the grid of the field-effect tube are connected with the servo module, the drain electrode of the field-effect tube and the temperature-compensation circuit
Connection.
9. according to claim 1~6 any one of them temperature control system, it is characterised in that the temperature control system further includes babinet,
The atomic frequency standard and the temperature control system are arranged in the babinet.
10. temperature control system according to claim 9, it is characterised in that the babinet is made of thermal insulation material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711383388.8A CN107979368B (en) | 2017-12-20 | 2017-12-20 | Temperature control system of atomic frequency standard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711383388.8A CN107979368B (en) | 2017-12-20 | 2017-12-20 | Temperature control system of atomic frequency standard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107979368A true CN107979368A (en) | 2018-05-01 |
| CN107979368B CN107979368B (en) | 2021-08-31 |
Family
ID=62006893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711383388.8A Expired - Fee Related CN107979368B (en) | 2017-12-20 | 2017-12-20 | Temperature control system of atomic frequency standard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107979368B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4839613A (en) * | 1988-05-31 | 1989-06-13 | Austron, Inc. | Temperature compensation for a disciplined frequency standard |
| JP2013058898A (en) * | 2011-09-08 | 2013-03-28 | Kyocera Corp | Oscillation device |
| CN203166871U (en) * | 2013-01-24 | 2013-08-28 | 江汉大学 | Improved atomic frequency standard servo system |
| CN103297047A (en) * | 2013-05-29 | 2013-09-11 | 江汉大学 | Atomic frequency standard and servo locking method |
| CN104485948A (en) * | 2014-10-31 | 2015-04-01 | 江汉大学 | Control method for time standard equipment and time standard equipment |
| CN205755246U (en) * | 2016-06-29 | 2016-11-30 | 北京菱拓电源设备有限公司 | A kind of AC DC power module |
| CN107315338A (en) * | 2017-06-19 | 2017-11-03 | 江汉大学 | A kind of chronometer time correcting device |
| CN107479358A (en) * | 2017-09-25 | 2017-12-15 | 江汉大学 | A kind of signal generator unit |
-
2017
- 2017-12-20 CN CN201711383388.8A patent/CN107979368B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4839613A (en) * | 1988-05-31 | 1989-06-13 | Austron, Inc. | Temperature compensation for a disciplined frequency standard |
| JP2013058898A (en) * | 2011-09-08 | 2013-03-28 | Kyocera Corp | Oscillation device |
| CN203166871U (en) * | 2013-01-24 | 2013-08-28 | 江汉大学 | Improved atomic frequency standard servo system |
| CN103297047A (en) * | 2013-05-29 | 2013-09-11 | 江汉大学 | Atomic frequency standard and servo locking method |
| CN104485948A (en) * | 2014-10-31 | 2015-04-01 | 江汉大学 | Control method for time standard equipment and time standard equipment |
| CN205755246U (en) * | 2016-06-29 | 2016-11-30 | 北京菱拓电源设备有限公司 | A kind of AC DC power module |
| CN107315338A (en) * | 2017-06-19 | 2017-11-03 | 江汉大学 | A kind of chronometer time correcting device |
| CN107479358A (en) * | 2017-09-25 | 2017-12-15 | 江汉大学 | A kind of signal generator unit |
Non-Patent Citations (3)
| Title |
|---|
| YEQING LI: "Temperature Compensation via RF Power Adjusting in Chip Scale Atomic Clocks", 《2011 JOINT CONFERENCE OF THE IEEE INTERNATIONAL FREQUENCY CONTROL AND THE EUROPEAN FREQUENCY AND TIME FORUM (FCS) PROCEEDINGS》 * |
| 周渭: "《频率及时间计量》", 30 September 1986, 陕西科学技术出版社 * |
| 李小敏: "基于单片机的温度测试箱控制***", 《电脑知识与技术》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107979368B (en) | 2021-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103499803B (en) | A kind of method improving precision of built-in real-time clock of electric energy meter MCU | |
| CN103019294B (en) | Maximum power point tracking (MPPT) method of self-adaption disturbance frequency and step | |
| CN105606236A (en) | Passive wireless temperature measurement sensor, and temperature measurement method thereof | |
| CN101154115A (en) | Method for tracing maximum power point of solar photovoltaic battery | |
| CN203352842U (en) | Induction heating equipment with frequency tracking circuit | |
| US9661710B1 (en) | Dimmer holding current control circuit for phase cut dimming power supply | |
| CN104808736B (en) | A kind of compensation method of pwm voltage | |
| CN107979368A (en) | The temperature control system of atomic frequency standard | |
| Hou et al. | A novel MPPT method for autonomous wireless sensor networks node with thermal energy harvesting | |
| CN108123711A (en) | A kind of temperature control system of atomic frequency standard | |
| CN204187854U (en) | A kind of thermostatic control system | |
| CN104033411B (en) | A kind of fan work control gear, method and there is the photovoltaic DC-to-AC converter of this control gear | |
| CN203119873U (en) | Atomic frequency standard temperature compensating system and atomic frequency standard | |
| CN207475291U (en) | A kind of long distance laser wireless charging emitter | |
| CN202841053U (en) | Intelligent compensation crystal oscillator | |
| Hu et al. | Development of W-band CW TWT amplifier | |
| CN103389752B (en) | For the temperature-controlled process of semiconductor heat treatment equipment | |
| CN203166871U (en) | Improved atomic frequency standard servo system | |
| CN215494740U (en) | Constant temperature control device of weather radar receiver | |
| CN104156028B (en) | A kind of MPPT compensator of photovoltaic generating system | |
| CN109164508B (en) | Constant temperature control module and microwave scintillator | |
| CN204758520U (en) | New electric conductance survey control circuit of machine is filtered to blood | |
| CN108418259B (en) | Micro-vibration efficient energy collecting and converting device | |
| CN201522658U (en) | Temperature control device of laser | |
| CN201904536U (en) | Suspended semiconductor refrigerating laser temperature control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for 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 |
Granted publication date: 20210831 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |