CN202197253U - Frequency control device reducing acceleration effect by voltage control end real time compensation - Google Patents
Frequency control device reducing acceleration effect by voltage control end real time compensation Download PDFInfo
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- CN202197253U CN202197253U CN2011202063613U CN201120206361U CN202197253U CN 202197253 U CN202197253 U CN 202197253U CN 2011202063613 U CN2011202063613 U CN 2011202063613U CN 201120206361 U CN201120206361 U CN 201120206361U CN 202197253 U CN202197253 U CN 202197253U
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Abstract
The present utility model provides a frequency control device reducing acceleration effect by voltage control end real time compensation. In the device, an acceleration compensation unit is added on the basis of a frequency reference source, the acceleration compensation unit mainly comprises a compensation voltage generating module, a compensation controller and a three dimensional acceleration sensor, wherein the three dimensional acceleration sensor is arranged together with the frequency reference source and used for detecting acceleration endured by a universal frequency reference source in real time, a detected acceleration value is sent to the compensation controller and the compensation voltage generating module, then a compensation voltage is obtained, and the compensation voltage is applied on a voltage control end of the frequency reference source to compensate frequency fluctuation caused by acceleration. In the device, the real time compensation technology is adopted, the compensation is carried out according to the acceleration value detected in real time, the shortage of huge volume which is brought by the mechanical buffering mode and is not favorable for miniaturization is overcome, and the application prospect is wide.
Description
Technical field
The present invention carries out acceleration compensation to the frequency reference source, is applied to high-precision FREQUENCY CONTROL occasion.The sophisticated electronics that carries like Aeronautics and Astronautics and various motion carrier.
Background technology
Frequency reference source such as constant-temperature crystal oscillator, atomic frequency standard etc. all comprise quartz oscillator.Because quartz oscillator is to acceleration sensitive, quartz oscillator mis-behave under vibration environment causes output frequency to change, and phase noise increases, and has reduced the performance of electronic equipment.
People have done research on mechanical structure at present, mechanically take various buffer technologys, reduce the influence of impacting crystal oscillator.Yet buffering mechanically can only reduce the impact of short-term, can't solve for the acceleration of low frequency.And impact mitigation measure mechanically increases equipment volume and weight, is unfavorable for miniaturization.
Summary of the invention
The present invention proposes a kind of frequency control apparatus that reduces acceleration effect based on voltage-controlled end real-Time Compensation.This device has increased the acceleration compensation unit on basis, frequency reference source; The acceleration compensation unit mainly comprises bucking voltage generation module, compensating controller and three dimension acceleration sensor; Wherein three dimension acceleration sensor and frequency reference source are installed together, and detect the acceleration that bear in the frequency reference source in real time, and detected accekeration is sent into compensating controller; Send into the bucking voltage generation module again, be compensated voltage; Bucking voltage is applied to the voltage-controlled end in frequency reference source, and compensation is because the frequency fluctuation that acceleration causes.
The frequency reference source has a voltage trim end, and the variation of this terminal voltage can cause the linearity of output frequency to change.Set up the relational model between crystal oscillator and the acceleration, the acceleration that adopts three dimension acceleration sensor measuring frequency a reference source to bear goes out bucking voltage according to Model Calculation.This bucking voltage is applied to the voltage-controlled end in frequency reference source, and the output frequency that brings with the real-Time Compensation acceleration effect fluctuates.
Real-Time Compensation technology is adopted in this invention, compensates according to the accekeration of real-time detection, has overcome the bulky shortcoming that is unfavorable for miniaturization that the mechanical damping mode is brought, and is with a wide range of applications.
Description of drawings
Fig. 1 is based on voltage-controlled end real-Time Compensation technical schematic diagram
Fig. 2 compensation effect figure
Fig. 3 compensating controller sketch map
Fig. 4 compensates the controlled quentity controlled variable sketch map
Segmentation of Fig. 5 voltage and filtering part sketch map
It is the enforcement circuit diagram of control chip that Fig. 6 adopts FPGA
The scheme of installation of Fig. 7 acceleration compensation circuit board
Embodiment
As shown in Figure 1 based on voltage-controlled end real-Time Compensation know-why.
Three dimension acceleration sensor and frequency reference source are installed together, and detect the acceleration that bear in the frequency reference source in real time, and detected accekeration is sent into compensating controller, send into the bucking voltage generation module again, are compensated voltage; Bucking voltage is applied to the voltage-controlled end in frequency reference source, and compensation is because the frequency fluctuation that acceleration causes.Its compensation effect is as shown in Figure 2, and fv1 is the frequency fluctuation that causes owing to acceleration merely, the frequency fluctuation of fv2 for causing owing to bucking voltage merely, and fvc1 is the frequency fluctuation after compensating.Because the influence of acceleration to frequency offset in compensation, therefore reduced the BURNING RATE ACCELERATION SENSITIVITY of universal frequency control appliance.
Compensating controller is as shown in Figure 3; Three dimension acceleration sensor detects the accekeration of x axle, y axle, three directions of z axle,
be the angle of three dimension acceleration sensor x axle, y axle, z axle and frequency reference source acceleration sensitive direction.k
aBe the acceleration sensitive coefficient in frequency reference source, k
vBe the voltage-controlled coefficient in frequency reference source, k
pBe scale factor.Be compensated controlled quentity controlled variable through block diagram shown in Figure 3.
Compensation controlled quentity controlled variable sketch map such as Fig. 4 after the compensation controlled quentity controlled variable is calculated by control chip, send into the bucking voltage generation module.The bucking voltage generation module comprises D/A converter and voltage segmentation and filter circuit.The compensation controlled quentity controlled variable obtains aanalogvoltage through D/A converter, obtains final bucking voltage through the voltage segmentation with filter circuit again.
The voltage segmentation is as shown in Figure 5 with the filtering part, comprises resistance R 1, R2, R3 and capacitor C.R1 one end links to each other with positive source, the other end and R2, and R3 links to each other, R2 other end ground connection, another termination input of R3.Capacitor C is parallelly connected with R2, and the main effect of capacitor C is to realize filtering.
Fig. 6 is a kind of enforcement circuit of acceleration compensation unit.It is control chip that this circuit adopts FPGA, comprises FPGA, D/A converter, power conversion and three dimension acceleration sensor.Three dimension acceleration sensor is connected with FPGA, and FPGA is connected with D/A converter, and D/A converter is connected with the frequency reference source, and power supply is connected with FPGA, frequency reference source.Being digital interface between three dimension acceleration sensor and the FPGA, is digital interface between FPGA and the D/A converter, and the voltage of D/A converter output is connected to the frequency reference source.Power conversion is the various voltages of FPGA need of work with the power conversion that provides.
Fig. 7 is the mounting means of constant-temperature crystal oscillator brief acceleration compensating circuit plate for working as the frequency reference source; The installation pad of acceleration compensation circuit board is corresponding with the output pin of constant-temperature crystal oscillator; The acceleration compensation circuit board can be directly installed on the constant-temperature crystal oscillator bottom, need not original constant-temperature crystal oscillator is done any change.
Claims (6)
1. reduce the frequency control apparatus of acceleration effect based on voltage-controlled end real-Time Compensation; Comprise frequency reference source, three dimension acceleration sensor, it is characterized in that, on basis, frequency reference source, increased the acceleration compensation unit; The acceleration compensation unit mainly comprises bucking voltage generation module, compensating controller and three dimension acceleration sensor; Wherein three dimension acceleration sensor and frequency reference source are installed together, and detect the acceleration that bear in the frequency reference source in real time, and detected accekeration is sent into compensating controller; Send into the bucking voltage generation module again, be compensated voltage; Bucking voltage is applied to the voltage-controlled end in frequency reference source, and compensation is because the frequency fluctuation that acceleration causes.
2. the frequency control apparatus based on voltage-controlled end real-Time Compensation reduction acceleration effect according to claim 1 is characterized in that three dimension acceleration sensor detects the accekeration of x axle, y axle, three directions of z axle,
Angle for three dimension acceleration sensor x axle, y axle, z axle and frequency reference source acceleration sensitive direction; k
aBe the acceleration sensitive coefficient in frequency reference source, k
vBe the voltage-controlled coefficient in frequency reference source, k
pBe scale factor.
3. the frequency control apparatus that reduces acceleration effect based on voltage-controlled end real-Time Compensation according to claim 1; It is characterized in that; The bucking voltage generation module comprises D/A converter and voltage segmentation and filter circuit; The compensation controlled quentity controlled variable obtains aanalogvoltage through D/A converter, obtains final bucking voltage through the voltage segmentation with filter circuit again; The voltage segmentation comprises resistance R 1, resistance R 2, resistance R 3 and capacitor C with filter circuit; Resistance R 1 one ends link to each other with positive source, and the other end links to each other with resistance R 2, resistance R 3, resistance R 2 other end ground connection; Another termination input of resistance R 3, capacitor C is parallelly connected with resistance R 2.
4. the frequency control apparatus that reduces acceleration effect based on voltage-controlled end real-Time Compensation according to claim 1; It is characterized in that employing FPGA is a control chip, comprises FPGA, D/A converter, power conversion and three dimension acceleration sensor; Three dimension acceleration sensor is connected with FPGA; FPGA is connected with D/A converter, and D/A converter is connected with the frequency reference source, and power supply is connected with FPGA, frequency reference source.
5. the frequency control apparatus that reduces acceleration effect based on voltage-controlled end real-Time Compensation according to claim 1; It is characterized in that; It between three dimension acceleration sensor and the FPGA digital interface; Be digital interface between FPGA and the D/A converter, the voltage of D/A converter output is connected to the frequency reference source, and power conversion is the various voltages of FPGA need of work with the power conversion that provides.
6. the frequency control apparatus based on voltage-controlled end real-Time Compensation reduction acceleration effect according to claim 1 is characterized in that the installation pad of acceleration compensation circuit board is corresponding with the output pin of constant-temperature crystal oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202063613U CN202197253U (en) | 2011-06-17 | 2011-06-17 | Frequency control device reducing acceleration effect by voltage control end real time compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202063613U CN202197253U (en) | 2011-06-17 | 2011-06-17 | Frequency control device reducing acceleration effect by voltage control end real time compensation |
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| CN202197253U true CN202197253U (en) | 2012-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202063613U Expired - Fee Related CN202197253U (en) | 2011-06-17 | 2011-06-17 | Frequency control device reducing acceleration effect by voltage control end real time compensation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291121A (en) * | 2011-06-17 | 2011-12-21 | 中国人民解放军国防科学技术大学 | Frequency control device for reducing acceleration effect based on voltage-controlled end real-time compensation |
| CN109889192A (en) * | 2019-03-25 | 2019-06-14 | 中国电子科技集团公司第二十六研究所 | A kind of crystal oscillator antivibration method, apparatus and hybrid compensation anti-shake system |
-
2011
- 2011-06-17 CN CN2011202063613U patent/CN202197253U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291121A (en) * | 2011-06-17 | 2011-12-21 | 中国人民解放军国防科学技术大学 | Frequency control device for reducing acceleration effect based on voltage-controlled end real-time compensation |
| CN109889192A (en) * | 2019-03-25 | 2019-06-14 | 中国电子科技集团公司第二十六研究所 | A kind of crystal oscillator antivibration method, apparatus and hybrid compensation anti-shake system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120418 Termination date: 20150617 |
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| EXPY | Termination of patent right or utility model |