CN102902288B - A kind of crystal oscillator with constant temperature control and calibration cell temperature-controlled process thereof - Google Patents
A kind of crystal oscillator with constant temperature control and calibration cell temperature-controlled process thereof Download PDFInfo
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- CN102902288B CN102902288B CN201210364573.3A CN201210364573A CN102902288B CN 102902288 B CN102902288 B CN 102902288B CN 201210364573 A CN201210364573 A CN 201210364573A CN 102902288 B CN102902288 B CN 102902288B
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Abstract
The invention discloses a kind of crystal oscillator with constant temperature control and calibration cell temperature-controlled process thereof, system comprises shell, constant-temperature circuit, also comprise pressure-temperature sensor, described pressure-temperature sensor is positioned at the enclosure of described crystal oscillator with constant temperature control, communicate to connect with described constant-temperature circuit, described housing interior volume is airtight volume, pressure data or the temperature data changed by described pressure data are converted to electric signal and are sent to described constant-temperature circuit by described pressure-temperature sensor in real time, described constant-temperature circuit adjusts the temperature of described calibration cell according to described electric signal.The present invention realizes temperature control by the mode detecting the change of crystal oscillator with constant temperature control air pressure inside, the temperature of calibration cell is controlled sensitiveer and accurate.
Description
Technical field
The present invention relates to telltale technical field, particularly relate to a kind of crystal oscillator with constant temperature control and calibration cell temperature-controlled process thereof.
Background technology
Early 1920s, since external First quartz oscillator comes out, more than 80 years so far, it obtains a wide range of applications as stable frequency source, as long-distance local telephone communication, and ground, navigation and the communication of aviation moving target, satellite communication, radar navigation observing and controlling, all needs to adopt all kinds of crystal oscillator as frequency control standard signal source; And for example radio astronomy, Experiments of Modern Physics, the electronic devices such as accurate time and frequency measurement, precise frequency synthesizer, all depend on highly stable crystal oscillator to provide accurate frequency marking and Shi Ji; For another example, as ground and the satellite atomic clock of accurate time-frequency primary standard, high performance servo crystal oscillator must also be adopted, otherwise, be just difficult to the one-level atomic frequency standard forming performance the best.In a word, in the field of contemporary electronic systems and the necessary frequency control such as equipment and accurate time-frequency metering and management, the various crystal oscillators of wide variety, had obtained widespread use already, and occupied the powerful and influential status being called " heart " usually.
Crystal oscillator with constant temperature control is the crystal oscillator that current frequency stability and degree of accuracy are the highest, is mainly used in equipment, the instrument such as mobile communication base station, national defence, navigation, frequency counter, frequency spectrum and network analyzer.
Crystal oscillator with constant temperature control is the temperature remained constant utilizing calibration cell to make crystal oscillator or quartz-crystal unit, minimum crystal oscillator is cut to by changing by environment temperature the oscillator output frequencies variable quantity caused, its inner structure as shown in figure, in crystal oscillator with constant temperature control, what have is only placed in calibration cell by quartz-crystal unit, have plenty of and quartz-crystal unit and relevant Important Components are placed in calibration cell, what also have is placed in inner calibration cell by quartz-crystal unit, and calibration cell oscillatory circuit being placed in outside carries out temperature compensation, carry out dual calibration cell control methods.
Along with improving constantly of the communication technology, constant-temperature crystal oscillator is had higher requirement, make it constantly towards the future development of high precision and high stable.
Figure 1 is a thermostatically controlled crystal oscillator in existing technology structure diagram, as shown in figure 1, constant temperature control of crystal oscillator is mainly made up of constant temperature circuit and oscillator circuit, the current thermistor is used to realize temperature control, it is well known that the basic heat transfer way for conduction, convection and radiation, heat will be some delay in the delivery process, and the constant temperature trough is a non-uniform temperature field, the internal temperature field distribution of the main reason is because the tub in all directions of adiabatic performance is different, the worse performance of adiabatic local cooling, tank temperature Zhi more, less good local cooling adiabatic performance, tank temperature is high, thus causing the groove of non-uniform temperature, the tank under the condition of uneven temperature distribution, temperature thermistor in the position of the groove, groove temperature stability and uniformity is different also.
So adopt detected temperatures mode to realize temperature control at present, temperature control lead-lag phenomenon is there will be in temperature control process, and temperature control equilibrium point is difficult to make an accurate selection of, so just there will be crystal oscillator with constant temperature control when extraneous temperature variation, its output frequency is corresponding to be changed to some extent, and crystal oscillator with constant temperature control is difficult to real not by the impact of ambient temperature.
Summary of the invention
The object of the invention is to propose a kind of crystal oscillator with constant temperature control and calibration cell temperature-controlled process thereof, the calibration cell temperature of crystal oscillator with constant temperature control can be made to control sensitiveer and accurate.
For reaching this object, the present invention by the following technical solutions:
The present invention proposes a kind of crystal oscillator with constant temperature control, comprise shell, constant-temperature circuit, also comprise pressure-temperature sensor, described pressure-temperature sensor is positioned at the enclosure of described crystal oscillator with constant temperature control, communicate to connect with described constant-temperature circuit, described housing interior volume is airtight volume, pressure data or the temperature data changed by described pressure data are converted to electric signal and are sent to described constant-temperature circuit by described pressure-temperature sensor in real time, and described constant-temperature circuit adjusts the temperature of described calibration cell according to described electric signal.
The invention allows for a kind of crystal oscillator with constant temperature control, comprise shell, constant-temperature circuit, also comprise pressure transducer, described pressure transducer is positioned at the enclosure of described crystal oscillator with constant temperature control, communicate to connect with described constant-temperature circuit, described housing interior volume is airtight volume, and pressure data is converted to electric signal and is sent to described constant-temperature circuit by described pressure transducer in real time, and described constant-temperature circuit adjusts the temperature of described calibration cell according to described electric signal.
The invention allows for a kind of crystal oscillator with constant temperature control, comprise shell, constant-temperature circuit, also comprise pressure-temperature sensor, it is inner that described pressure-temperature sensor is positioned at described calibration cell, communicate to connect with described constant-temperature circuit, described calibration cell inner space is airtight volume, and pressure data or temperature data are converted to electric signal and are sent to described constant-temperature circuit by described pressure-temperature sensor in real time, and described constant-temperature circuit adjusts the temperature of described calibration cell according to the change of described electric signal.
The invention allows for a kind of crystal oscillator with constant temperature control, comprise shell, constant-temperature circuit, also comprise pressure transducer, it is inner that described pressure transducer is positioned at described calibration cell, communicate to connect with described constant-temperature circuit, described calibration cell inner space is airtight volume, and pressure data is converted to electric signal and is sent to described constant-temperature circuit by described pressure transducer in real time, and described constant-temperature circuit adjusts the temperature of described calibration cell according to the change of described electric signal.
The present invention proposes a kind of calibration cell temperature-controlled process of crystal oscillator with constant temperature control, described method is based on described crystal oscillator with constant temperature control as above, adopt pressure-temperature sensor, the temperature data that described pressure-temperature sensor reads pressure data in real time or changed by described pressure data, described pressure data or the temperature data changed by described pressure data are converted to electric signal and are sent to described constant-temperature circuit, described constant-temperature circuit receives described telecommunications breath, according to the change of described electric signal, the temperature of the described calibration cell of real-time adjustment is to keep the temperature constant of described calibration cell.
The invention allows for a kind of calibration cell temperature-controlled process of crystal oscillator with constant temperature control, described method is based on described crystal oscillator with constant temperature control as above, adopt pressure transducer, described pressure transducer reads pressure data in real time, described pressure data is converted to electric signal and is sent to described constant-temperature circuit, described constant-temperature circuit receives described electric signal, according to the change of described electric signal, the temperature of the described calibration cell of real-time adjustment, to keep the temperature constant of described calibration cell.
Advantageous Effects of the present invention is: realize temperature control by the mode detecting the change of crystal oscillator with constant temperature control air pressure inside, the temperature of calibration cell is controlled sensitiveer and accurate, avoid in prior art and can postpone to make crystal oscillator be subject to the impact of ambient temperature because of heat trnasfer by the mode of direct-detection temperature variation, product can be realized real not by the object of extraneous thermal effect.
Accompanying drawing explanation
Fig. 1 is crystal oscillator with constant temperature control structured flowchart in prior art;
Fig. 2 is the crystal oscillator with constant temperature control structured flowchart described in the specific embodiment of the invention one;
Fig. 3 is the crystal oscillator with constant temperature control structured flowchart described in the specific embodiment of the invention two;
Fig. 4 is the calibration cell temperature-controlled process process flow diagram described in the specific embodiment of the invention three.
Embodiment
Technical scheme of the present invention utilizes the relation in confined space between temperature and air pressure to reach carries out sensitiveer and accurate control object to the temperature of calibration cell.
Temperature is high, and the energy that gas molecule has just becomes large, and gas molecule motion just accelerates, and also just increases the pressure of chamber wall.
In confined space, there is quantitative relation in temperature and pressure:
PV/T=constant
So for the gas sealed, V is constant, temperature raises, and pressure must raise.
Technical scheme of the present invention is further illustrated by embodiment below in conjunction with accompanying drawing.
Embodiment one
Fig. 2 is the crystal oscillator with constant temperature control structured flowchart described in the present embodiment, and as shown in Figure 2, the crystal oscillator with constant temperature control described in the present embodiment comprises shell 201, constant-temperature circuit 204, oscillatory circuit 203, calibration cell 202 and pressure-temperature sensor 205.
Wherein said oscillatory circuit 203 is arranged in described calibration cell 202; Described shell 201 is for encapsulating described crystal oscillator with constant temperature control, and described shell 201 inner space is airtight volume; Described constant-temperature circuit 204 comprises heating circuit, it is inner that described heating circuit is positioned at described calibration cell 202, this heating circuit is controlled by described constant-temperature circuit 204 thus heats described calibration cell 202, to realize the object of the temperature constant keeping described calibration cell 202; Described pressure-temperature sensor 205 communicates to connect with described constant-temperature circuit 204, pressure data or temperature data are converted to electric signal and are sent to described constant-temperature circuit 204 by described pressure-temperature sensor 205 in real time, and described constant-temperature circuit 204 adjusts the temperature of described calibration cell 202 according to the change of described electric signal.
Described pressure-temperature sensor 205 is placed in described shell 201 by the crystal oscillator with constant temperature control described in the present embodiment, and described shell 201 inside keeps airtight, according to the principle that gas expands with heat and contract with cold, by described pressure-temperature sensor 205, the change of calibration cell 202 air pressure inside is converted to the change of electric signal, the temperature of constant-temperature circuit 204 to described crystal oscillator with constant temperature control is coordinated to control, to reach the object of constant temperature by the change of electric signal.Cause is air pressure is balanced in crystal oscillator with constant temperature control shell 201, and change consistent, as long as so the air pressure of described crystal oscillator with constant temperature control shell 201 inside will be caused when the temperature in the external world changes to change, pressure-temperature sensor 205 will be corresponding the change of real-time pressure be converted to electric signal be provided to constant-temperature circuit 204, described constant-temperature circuit 204 adjusts described heating circuit to reach constant temperature target in real time according to the change in electric of described pressure-temperature sensor 205.
Pressure-temperature sensor 205 described in the present embodiment, also other devices can be replaced with, as long as described device directly or indirectly can reflect described calibration cell 202 internal temperature, and be suitable for described temperature data or temperature variation data being communicated to described constant-temperature circuit 204 and control to carry out temperature to described calibration cell 202, such as substitute described pressure-temperature sensor 205 with pressure transducer.
Embodiment two
Fig. 3 is the crystal oscillator with constant temperature control structured flowchart described in the present embodiment, and as shown in Figure 3, the crystal oscillator with constant temperature control described in the present embodiment comprises shell 301, constant-temperature circuit 304, oscillatory circuit 303, calibration cell 302 and pressure-temperature sensor 305.
Wherein said oscillatory circuit 303 and described pressure-temperature sensor 305 are arranged in described calibration cell 302; Described calibration cell 302 inner space is airtight volume; Described constant-temperature circuit 304 comprises heating circuit, described in add loop to be positioned at described calibration cell 302 inner, controlled to heat described calibration cell 302 by described constant-temperature circuit 304, to realize the object of the temperature constant keeping described calibration cell 302; Described pressure-temperature sensor 305 communicates to connect with described constant-temperature circuit 304, real-time pressure data or temperature data are converted to electric signal and are sent to described constant-temperature circuit 304 by described pressure-temperature sensor 305, and described constant-temperature circuit 304 adjusts the temperature of described calibration cell 302 according to the change of described electric signal.
Crystal oscillator with constant temperature control described in the present embodiment is placed in calibration cell 302 by pressure-temperature sensor 305, calibration cell 302 inside keeps airtight, according to the principle that gas expands with heat and contract with cold, the change of calibration cell 302 air pressure inside is converted to the change of electric signal by pressure-temperature sensor 305, the temperature of constant-temperature circuit 304 to described crystal oscillator with constant temperature control is coordinated to control, to reach the object of constant temperature by the change of electric signal.Cause is air pressure is balanced in described calibration cell, and change consistent, as long as so the air pressure of described calibration cell inside will be caused when the temperature in the external world changes to change, such pressure-temperature sensor 305 will be corresponding the change of real-time pressure be converted to electric signal be provided to described constant-temperature circuit, described constant-temperature circuit 304 adjusts described heating circuit to reach constant temperature target in real time according to the change in electric of pressure-temperature sensor.
Pressure-temperature sensor 305 described in the present embodiment, also other devices can be replaced with, as long as described device directly or indirectly can reflect described calibration cell 302 internal temperature, and be suitable for described temperature data or temperature variation data being communicated to described constant-temperature circuit 304 and control to carry out temperature to described calibration cell 202, such as substitute described pressure-temperature sensor 305 with pressure transducer.
Embodiment three
Calibration cell temperature-controlled process described in the present embodiment is based on the crystal oscillator with constant temperature control described in embodiment one or embodiment two, Fig. 4 is the calibration cell temperature-controlled process process flow diagram described in the specific embodiment of the invention three, as shown in Figure 4, its calibration cell temperature-controlled process comprises:
S401, pressure-temperature sensor read pressure data or temperature data;
S402, convert pressure data or temperature data to electric signal;
S403, data are sent to constant-temperature circuit;
S404, constant-temperature circuit are according to electric signal adjustment calibration cell temperature.
Wherein, pressure-temperature sensor described in the present embodiment, also other devices can be replaced with, as long as described device directly or indirectly can reflect described calibration cell internal temperature, and be suitable for the temperature data of described direct or indirect reflection or temperature variation data, be communicated to described constant-temperature circuit, control to carry out temperature to described calibration cell, such as, substitute described pressure-temperature sensor with pressure transducer.
The present invention realizes temperature control by the mode detecting the change of crystal oscillator with constant temperature control air pressure inside, the temperature of calibration cell is controlled sensitiveer and accurate, avoid in prior art and can postpone to make crystal oscillator be subject to the impact of ambient temperature because of heat trnasfer by the mode of direct-detection temperature variation, product can be realized real not by the object of extraneous thermal effect.
All or part of content in the technical scheme that above embodiment provides can be realized by software programming, and its software program is stored in the storage medium that can read, storage medium such as: the hard disk in computing machine, CD or floppy disk.
Above are only preferred embodiment of the present invention and institute's application technology principle, be anyly familiar with those skilled in the art in the technical scope that the present invention discloses, the change that can expect easily or replacement, all should be encompassed in protection scope of the present invention.
Claims (6)
1. a crystal oscillator with constant temperature control, comprise shell, constant-temperature circuit and calibration cell, it is characterized in that, also comprise pressure-temperature sensor, described pressure-temperature sensor is positioned at the enclosure of described crystal oscillator with constant temperature control, communicate to connect with described constant-temperature circuit, described housing interior volume is airtight volume, pressure data or the temperature data changed by described pressure data are converted to electric signal and are sent to described constant-temperature circuit by described pressure-temperature sensor in real time, and described constant-temperature circuit adjusts the temperature of described calibration cell according to described electric signal.
2. a crystal oscillator with constant temperature control, comprise shell, constant-temperature circuit and calibration cell, it is characterized in that, also comprise pressure transducer, described pressure transducer is positioned at the enclosure of described crystal oscillator with constant temperature control, communicates to connect with described constant-temperature circuit, and described housing interior volume is airtight volume, pressure data is converted to electric signal and is sent to described constant-temperature circuit by described pressure transducer in real time, and described constant-temperature circuit adjusts the temperature of described calibration cell according to described electric signal.
3. a crystal oscillator with constant temperature control, comprise shell, constant-temperature circuit and calibration cell, it is characterized in that, also comprise pressure-temperature sensor, it is inner that described pressure-temperature sensor is positioned at described calibration cell, communicate to connect with described constant-temperature circuit, described calibration cell inner space is airtight volume, the temperature data that pressure data or described pressure data are changed is converted to electric signal and is sent to described constant-temperature circuit by described pressure-temperature sensor in real time, and described constant-temperature circuit adjusts the temperature of described calibration cell according to the change of described electric signal.
4. a crystal oscillator with constant temperature control, comprise shell, constant-temperature circuit and calibration cell, it is characterized in that, also comprise pressure transducer, it is inner that described pressure transducer is positioned at described calibration cell, and communicate to connect with described constant-temperature circuit, described calibration cell inner space is airtight volume, pressure data is converted to electric signal and is sent to described constant-temperature circuit by described pressure transducer in real time, and described constant-temperature circuit adjusts the temperature of described calibration cell according to the change of described electric signal.
5. the calibration cell temperature-controlled process of a crystal oscillator with constant temperature control, it is characterized in that, described method is based on the crystal oscillator with constant temperature control as described in claim 1 or 3, the temperature data that described pressure-temperature sensor reads pressure data in real time or changed by described pressure data, described pressure data or the temperature data changed by described pressure data are converted to electric signal and are sent to described constant-temperature circuit, described constant-temperature circuit receives described electric signal, according to the change of described electric signal, the temperature of the described calibration cell of real-time adjustment is to keep the temperature constant of described calibration cell.
6. the calibration cell temperature-controlled process of a crystal oscillator with constant temperature control, it is characterized in that, described method is based on the crystal oscillator with constant temperature control as described in claim 2 or 4, described pressure transducer reads pressure data in real time, described pressure data is converted to electric signal and is sent to described constant-temperature circuit, described constant-temperature circuit receives described electric signal, according to the change of described electric signal, the temperature of the described calibration cell of real-time adjustment, to keep the temperature constant of described calibration cell.
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| CN201210364573.3A CN102902288B (en) | 2012-09-26 | 2012-09-26 | A kind of crystal oscillator with constant temperature control and calibration cell temperature-controlled process thereof |
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| CN107911095A (en) * | 2017-12-25 | 2018-04-13 | 广东大普通信技术有限公司 | Constant-temperature crystal oscillator |
| CN112737507B (en) * | 2021-02-01 | 2022-07-08 | 山东新港电子科技有限公司 | Method for realizing RTC high precision based on temperature sensor |
| CN113125023A (en) * | 2021-03-05 | 2021-07-16 | 深圳市福浪电子有限公司 | Detection device for detecting temperature of crystal oscillator |
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| CN1261994A (en) * | 1997-07-09 | 2000-08-02 | “黑晶”公开股份公司 | Thermostatically controlled quartz generator |
| CN1716656A (en) * | 2004-06-29 | 2006-01-04 | 日本电波工业株式会社 | Crystal oscillator |
| CN101783649A (en) * | 2008-12-25 | 2010-07-21 | 日本电波工业株式会社 | Oven controlled multistage crystal oscillator |
| CN102025321A (en) * | 2010-12-22 | 2011-04-20 | 广东大普通信技术有限公司 | Constant-temperature crystal oscillator |
| CN202014225U (en) * | 2009-10-23 | 2011-10-19 | Cts公司 | Incubator type crystal oscillator component |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4955042B2 (en) * | 2009-05-18 | 2012-06-20 | 日本電波工業株式会社 | Constant temperature crystal oscillator |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261994A (en) * | 1997-07-09 | 2000-08-02 | “黑晶”公开股份公司 | Thermostatically controlled quartz generator |
| CN1716656A (en) * | 2004-06-29 | 2006-01-04 | 日本电波工业株式会社 | Crystal oscillator |
| CN101783649A (en) * | 2008-12-25 | 2010-07-21 | 日本电波工业株式会社 | Oven controlled multistage crystal oscillator |
| CN202014225U (en) * | 2009-10-23 | 2011-10-19 | Cts公司 | Incubator type crystal oscillator component |
| CN102025321A (en) * | 2010-12-22 | 2011-04-20 | 广东大普通信技术有限公司 | Constant-temperature crystal oscillator |
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