CN104270094A - Device and method for reducing oscillator accelerated speed effect through mixed compensation - Google Patents
Device and method for reducing oscillator accelerated speed effect through mixed compensation Download PDFInfo
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- CN104270094A CN104270094A CN201410496965.4A CN201410496965A CN104270094A CN 104270094 A CN104270094 A CN 104270094A CN 201410496965 A CN201410496965 A CN 201410496965A CN 104270094 A CN104270094 A CN 104270094A
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Abstract
The invention discloses a device and method capable of reducing the oscillator accelerated speed effect, and aims at providing a device and method for reducing the accelerated speed effect through the cooperation of mechanical compensation and real-time compensation. The device is composed of an oscillator, an accelerated speed sensor, an accelerated speed compensation circuit, an elastic support and a metal shell. The elastic support is a supporting piece which has the elasticity, can generate deformation under the 0-100 g accelerated speed condition, and can achieve self recovery. The method is characterized in that high-frequency vibration is reduced through the elastic support, the offset voltage is generated in real time through the accelerated speed compensation circuit to be applied to the oscillator, and frequency changes caused by low-frequency vibration are offset. By means of the device and method, influences of 2-2 KHz vibration on the output performance of the oscillator can be effectively reduced, and the oscillator accelerated speed effect can be better reduced.
Description
Technical field
The present invention relates to the apparatus and method of oscillator being carried out to vibration compensation, be applied to high-precision FREQUENCY CONTROL occasion, as the sophisticated electronics of Aeronautics and Astronautics and various vibration occasion.。
Background technology
Oscillator such as constant-temperature crystal oscillator, atomic frequency standard etc. all comprise quartz crystal.Because quartz crystal is to acceleration sensitive, quartz crystal parameter change under vibration, causes output frequency to change, and phase noise increases, and reduces the performance of electronic equipment.
Current people have done research in mechanical structure, mechanically take various buffer technology, reduce the impact of vibration on oscillator.But buffering is mechanically only effective to dither (referring generally to the vibration of more than 100HZ), for the vibration of low frequency, then effect is poor.In addition oscillator bears constant acceleration and then adopts mechanical damping to solve, as when oscillator spins upside down due to the frequency change that acceleration of gravity causes, this frequency change cannot adopt mechanical damping mode to compensate.And impact mitigation measure increasing device volume and weight mechanically, is unfavorable for miniaturization.Document [1] (comment on by scientific instrument, 83rd volume the 6th phase, the paper in June, 2012 adopts real-time digital to compensate the acceleration effect reducing quartz resonator) describe the method utilizing real-time digital to compensate reduction quartz oscillator acceleration effect, because real-Time Compensation needs to detect that acceleration produces voltage again and goes to compensate, time delay is inevitable, and therefore real-Time Compensation is mainly effective to the vibration lower than 300HZ.Because the vibration frequency range of airborne, missile-borne environment is generally at 2 ~ 2KHz, mechanical damping is mainly effective to the vibration in 100Hz-2KHz frequency range, and the compensation method that document [1] is announced is mainly effective to the vibration of below 300Hz, does not therefore have a kind of method to cover at present and all vibrate frequency range.How both having reduced the impact of vibration for oscillator of 2-100Hz, and reduced again the impact of vibration for oscillator of 100-2KHz, is the important topic that those skilled in the art study for a long time.
Summary of the invention
The technical problem to be solved in the present invention is the apparatus and method proposing a kind of reduction acceleration effect adopting mechanical compensation to be combined with real-Time Compensation, the impact of 2 ~ 2KHz vibration for oscillator output performance can be effectively reduced, make to adopt oscillator not reduce its service behaviour because of vibration as the electronic equipment of local frequency standard.
Technical solution of the present invention is:
The device that the present invention can reduce oscillator acceleration effect is made up of oscillator, acceleration transducer, acceleration compensation circuit, resiliency supported and metal shell.Acceleration transducer and oscillator are rigidly connected and form oscillator firmware, and acceleration transducer detects the acceleration that oscillator bears in real time; Acceleration transducer is electrically connected with acceleration compensation circuit, will speed up angle value and gives acceleration compensation circuit; Acceleration compensation circuit is electrically connected with the voltage-controlled input of oscillator, and the bucking voltage that acceleration compensation circuit produces in real time is applied to the voltage-controlled input of oscillator.The oscillator firmware that oscillator becomes with groups of acceleration sensors by resiliency supported is fixed on metal shell, resiliency supported be a kind of there is elasticity and can produce in 0-100g acceleration situation distortion and the strutting piece of self recovery (as steel wire rope, rubber blanket, spring, sponge), can the mechanical oscillation of bearing of isolated part metal shell, g is acceleration of gravity.
Adopt the present invention can reach following technique effect:
Apparatus of the present invention both can isolate dither, can carry out real-Time Compensation again to low-frequency vibration, reduced the dither effect of oscillator in 2-2KHz frequency range.Because resiliency supported designs mainly for dither, therefore volume size is less.Acceleration transducer can adopt micro electronmechanical MEMS sensor, and acceleration compensation control circuit can adopt the device that integrated level is high, and therefore whole device can be encapsulated in a metal shell.When vibrated, device can reduce acceleration effect voluntarily, intervenes without the need to the external world.
Adopt the method for the invention, acceleration transducer detects oscillator in real time and bears acceleration, and acceleration compensation circuit produces the voltage-controlled end that bucking voltage is applied to oscillator in real time, offsets owing to vibrating the frequency change caused.Resiliency supported then reduces dither, and when low-frequency vibration, real-Time Compensation has good compensation effect.Therefore comprehensive, the combination of two kinds of methods obtains making oscillator the effect better reducing acceleration effect.
Accompanying drawing explanation
Fig. 1 is the overall construction drawing of apparatus of the present invention;
Fig. 2 is the building-block of logic of acceleration compensation circuit in Fig. 1;
Fig. 3 is the analog compensation circuit of employing three single-axis acceleration sensors;
Fig. 4 is the analog compensation circuit of an employing single-axis acceleration sensors;
Fig. 5 is the analog compensation circuit of an employing 3-axis acceleration sensor;
Embodiment
As shown in Figure 1, device is made up of oscillator, acceleration transducer, acceleration compensation control circuit, resiliency supported and metal shell apparatus structure.Oscillator is the module that can produce stable output frequency in the quiescent state, can be the oscillating circuit that quartz crystal is formed, may also be the atomic clock of grade step that uses atomic energy, have x, y, z tri-axles; Acceleration transducer detects the acceleration that oscillator bears in real time; Acceleration compensation circuit produces bucking voltage in real time; Resiliency supported reduces the vibration that metal shell brings.
Acceleration transducer is selected according to the vibration operating mode of device reality, can adopt the micro electronmechanical acceleration transducer of MEMS.The actual peak acceleration of bearing of device is known according to the actual vibration operating mode of device.The range of acceleration transducer should higher than the actual peak acceleration of bearing of device.The resolution of acceleration transducer should lower than the one thousandth of acceleration transducer range.As when certain aircraft works, peak acceleration is 30g, then acceleration transducer range should be greater than 30g, and resolution should be less than 0.03g.According to actual conditions, as compensated three direction of principal axis acceleration compensations of oscillator, then need to adopt 3-axis acceleration sensor, three single-axis acceleration sensors also can be adopted to be arranged on three mutually perpendicular directions; As only needed to compensate a direction, then adopt single-axis acceleration sensors.Acceleration transducer can adopt micro electronmechanical MEMS sensor, is rigidly connected between acceleration transducer and oscillator, forms oscillator firmware.
The output of acceleration transducer has with acceleration real-Time Compensation circuit and is electrically connected, this connection be a kind of signal connecting interface (as wire, cable, pcb board electrical connection all can).Acceleration transducer detects the acceleration that oscillator bears in real time, will speed up angle value and gives acceleration compensation circuit by data communication interface.Acceleration compensation circuit has with the voltage-controlled input of oscillator and is electrically connected, this connection be a kind of signal of telecommunication connecting interface (as wire, cable, pcb board electrical connection all can), acceleration compensation circuit produce bucking voltage be applied on the voltage-controlled input of oscillator.
Metal shell is made up of main body and lid.Main body is hatch frame, has bottom surface and multiple side.Lid is identical with bottom shape, can embed body seal.Metal shell is hermetically-sealed construction, prevents extraneous electromagnetic interference.Oscillator firmware, resiliency supported are placed in metal shell, and resiliency supported contacts with shell, oscillator and spring-loaded contact, and oscillator firmware does not directly contact with shell.
Resiliency supported be a kind of there is elasticity and can produce in 0-100g acceleration situation distortion and the strutting piece of self recovery (as steel wire rope, rubber blanket, spring, sponge, foam), can the mechanical oscillation of bearing of isolated part metal shell, g is acceleration of gravity, is 9.8N/kg.If resiliency supported is have the fixing structure in two ends, as steel wire rope rubber blanket spring, then one end is fixed on metal shell, and the other end is fixed on oscillator firmware.If resiliency supported is filler, be then filled in the space between metal shell and oscillator firmware.
Fig. 2 is the digital control implementation of one of acceleration compensation circuit.The acceleration compensation circuit adopting digital control approach to realize is made up of 1 data stream module, 3 exceptional value screening modules, 3 positive and negative determination modules, 3 negative value processing modules, 3 multipliers, 1 register, 2 adders, 1 D/A converter module.Data stream module is connected with acceleration transducer by data communication interface, obtains from acceleration transducer the acceleration that current oscillation bears.Data stream module carries out synchronous interpretation to the acceleration obtained, acceleration transducer has established data agreement, x is obtained according to this data protocol, y, z-axis acceleration information, by x, y, z-axis acceleration information carries out positive and negative judgement, if negative value is then converted to negative integer form by negative value process, is transferred to the first exceptional value screening module, the second exceptional value screening module, the 3rd exceptional value screening module respectively.
3 exceptional value screening modular structures are the same.The rate of change of the first exceptional value screening module to X-axis acceleration detects, and when detecting that x-axis rate of acceleration change exceedes 1.4 times of actual condition peak acceleration rate of change, then rejects the x-axis accekeration this time detected, still keeps original x-axis accekeration.Second exceptional value screening module sequential according to a preconcerted arrangement, the rate of change of y-axis acceleration is detected, when detecting that y-axis rate of acceleration change exceedes 1.4 times of actual condition peak acceleration rate of change, then reject the y-axis accekeration this time detected, still keep original y-axis accekeration.3rd exceptional value screening module sequential according to a preconcerted arrangement, the rate of change of z-axis acceleration is detected, when detecting that z-axis rate of acceleration change exceedes 1.4 times of actual condition peak acceleration rate of change, then reject the z-axis accekeration this time detected, still keep original z-axis accekeration.
Register stores x, y, z 3 three weighted values of axle, and each weighted value is by the quotient representation of two integers, and two integers are respectively dividend and divisor, wherein dividend be greater than 0 positive integer, divisor is the positive integer power of 2.Therefore 6 integers and x-axis weighted value dividend, x-axis weighted value divisor, y-axis weighted value dividend, y-axis weighted value divisor, z-axis weighted value dividend, z-axis weighted value divisor is stored in register altogether.Register is connected with divider with 3 multipliers.The determination of weighted value is as follows: set oscillator in certain axle acceleration coefficient of sensitivity as ag, and the full scale of the voltage control coefficient of oscillator to be av, vmax be analog to digital converter, then weighted value equals ag*vmax/av.
3 multipliers are all connected with register, first multiplier is connected with the first exceptional value screening module, the first divider, second multiplier is connected with the second exceptional value screening module, the second divider, and the 3rd multiplier is connected with the 3rd exceptional value screening module, the 3rd divider.The output that multiplier realizes exceptional value screening module is multiplied with the dividend that register stores.The x-axis accekeration received from the first exceptional value screening module is multiplied with the x-axis weighted value dividend in register by the first multiplier, and what obtain long-pendingly gives the first divider; The y-axis accekeration received from the second exceptional value screening module is multiplied with the y-axis weighted value dividend in register by the second multiplier, and what obtain long-pendingly gives the second divider; 3rd multiplier by from the 3rd exceptional value screening module receive z-axis accekeration and register in; Z-axis weighted value dividend is multiplied, and what obtain long-pendingly gives the 3rd divider.
3 dividers are connected with multiplier with register respectively, export and are connected to first adder.Divider realizes the divisor that the output of multiplier and register store and is divided by.Long-pending and the register obtained from the first multiplier is stored x-axis weighted value divisor and is divided by by the first divider, and the business obtained gives first adder; The long-pending y-axis weighted value divisor stored with register obtained from the second multiplier is divided by by the second divider, and the business obtained gives first adder; The long-pending z-axis weighted value divisor stored with register obtained from the 3rd multiplier is divided by by the 3rd divider, and the business obtained gives first adder;
First adder is connected with second adder with three dividers, the business obtained is added, and gives second adder by result from three dividers.
Second adder realizes dc point settings and is added with first adder output valve.The settings of dc point are the direct voltage settings of finger pressing controlled end.The change of these settings can change the centre frequency of oscillator.User's centre frequency determination dc point settings as required.
D/A converter module is connected with the voltage-controlled end of oscillator with second adder, and the digital value transmitted from second adder is converted to analog voltage, analog voltage is given the voltage-controlled input of oscillator.The output of D/A converter module also can connect the voltage-controlled input that inductance transports to oscillator again, and inductance is single-input single-output device, can be band pin also can be paster, can logarithmic mode conversion output carry out filtering.
Acceleration compensation circuit can adopt FPGA to realize, and its benefit is that FPGA strictly works chronologically, and complicated calculation task can all complete a clock cycle, can guarantee to complete compensation task fast.
Fig. 3 is a kind of analog circuit implementation.The realizing circuit of analog circuit is adopted to be made up of three single-axis acceleration sensors, three scaling circuit, adders.Three single-axis acceleration sensors are respectively x-axis, y-axis, z-axis acceleration transducer, and they are mutually vertical, are connected with oscillator.Three scaling circuit are respectively first, second, third scaling circuit, be connected with x-axis, y-axis, z-axis acceleration transducer respectively, realize the scale amplifying of signal or reduce, its ratio value be actual measurement oscillator acceleration transducer detection side to acceleration sensitive coefficient divided by the voltage control coefficient of oscillator.The measurement of oscillator acceleration sensitive coefficient is a disclosed method.Oscillator is more responsive, then ratio value is larger.The output of three scaling circuit is connected to the input of adder, and adder also receives outside incoming level, and the output of adder is connected to the voltage-controlled input of oscillator.
Fig. 4 is a kind of analog circuit implementation.The realizing circuit of analog circuit is adopted to be made up of a single-axis acceleration sensors, scaling circuit, an adder.Single-axis acceleration sensors and oscillator are connected.Scaling circuit is connected with acceleration transducer, realizes the scale amplifying of signal or reduces, its ratio value be actual measurement oscillator acceleration transducer detection side to acceleration sensitive coefficient divided by the voltage control coefficient of oscillator.Oscillator is more responsive, then ratio value is larger.The output of scaling circuit is connected to the input of adder, and adder also receives outside incoming level, and the output of adder is connected to the voltage-controlled input of oscillator.
Fig. 5 is a kind of analog circuit implementation.The realizing circuit of analog circuit is adopted to be made up of a 3-axis acceleration sensor, scaling circuit, an adder.3-axis acceleration sensor and oscillator are connected.Scaling circuit and acceleration transducer electrically on be connected, realize the scale amplifying of signal or reduce, its ratio value is according to the acceleration sensitive coefficient sum of oscillator on acceleration transducer three direction of principal axis of actual measurement.The acceleration sensitive coefficient sum in three directions is larger, then ratio value is larger.The output of scaling circuit is connected to the input of adder, and adder also receives outside incoming level, and the output of adder is connected to the voltage-controlled input of oscillator.
Method of the present invention comprises the following steps when adopting digital compensation circuit:
The first step, determines three weighted values according to the acceleration sensitive coefficient in oscillator three directions.Acceleration sensitive coefficient is larger, then weighted value is larger.Weighted value represents with the business of two integers.Three weighted values are 6 integers, by the order of x-axis weighted value dividend, x-axis weighted value divisor, y-axis weighted value dividend, y-axis weighted value divisor, z-axis weighted value dividend, z-axis weighted value divisor stored in register.
Second step, in practical work process, the metal shell of device bears vibration, and resiliency supported self produces deformation, the acceleration making the actual acceleration born of oscillator firmware be less than metal shell to bear.
3rd step, acceleration transducer detects the acceleration of oscillator in real time, and will speed up angle value and give acceleration compensation circuit;
4th step, acceleration compensation circuit receives the x of acceleration transducer, y, the acceleration (3 values) of z-axis, and data stream module extracts x, y, z axle acceleration value, delivers to first, second, third positive and negative determination module respectively.
5th step, the first positive and negative determination module carries out positive and negative judgement to x-axis accekeration, if positive number, directly deliver to the first multiplier, if negative, deliver to the first negative value processing module, first negative value processing module carries out negative value process to data, output is given the first exceptional value screening module; Second positive and negative determination module carries out positive and negative judgement to y-axis accekeration, if positive number, directly delivers to the second multiplier, if negative, deliver to the second negative value processing module, the second negative value processing module carries out negative value process to data, output is given the second exceptional value screening module; 3rd positive and negative determination module carries out positive and negative judgement to z-axis accekeration, if positive number, directly delivers to the 3rd multiplier, if negative, deliver to the 3rd negative value processing module, the 3rd negative value processing module carries out negative value process to data, output is given the 3rd exceptional value screening module;
6th step, the first exceptional value screening module carries out exceptional value screening to input data, result is given the first multiplier; Second exceptional value screening module carries out exceptional value screening to input data, result is given the second multiplier; 3rd exceptional value screening module carries out exceptional value screening to input data, result is given the 3rd multiplier.
7th step, the data after exceptional value is screened by the first multiplier are multiplied with the dividend of the x-axis weighted value stored in register, result are given the first divider; Data after exceptional value is screened by the second multiplier are multiplied with the dividend of the y-axis weighted value stored in register, result are given the second divider; Data after exceptional value is screened by the 3rd multiplier are multiplied with the dividend of the z-axis weighted value stored in register, result are given the 3rd divider.
8th step, the divisor of the x-axis weighted value stored in the result that the first multiplier transmits by the first divider and register is divided by, and result is delivered to first adder; The divisor of the y-axis weighted value stored in the result that the second multiplier transmits by the second divider and register is divided by, and result is delivered to first adder; The divisor of the z-axis weighted value stored in the result that the 3rd multiplier transmits by the 3rd divider and register is divided by, and result is delivered to first adder.
9th step, the output of first adder to three dividers is added, and result is delivered to second adder.
Tenth step, the result that first adder transmits by second adder is added with dc point settings, and result is delivered to D/A converter module.
11 step, D/A converter module carries out digital-to-analogue conversion to the output of second adder, obtain corresponding analog voltage, and analog voltage is applied to the voltage-controlled input of oscillator, make oscillator output frequencies produce the change contrary with dither effect, thus reduce the impact of vibration on oscillator output frequencies.
Method of the present invention comprises the following steps when adopting analog compensation circuit:
The first step, according to the value of the acceleration sensitive coefficient determination scaling circuit of oscillator.Acceleration sensitive coefficient is larger, then ratio value is larger.
Second step, in practical work process, the metal shell of device bears vibration, and resiliency supported self produces deformation, the acceleration making the actual acceleration born of oscillator firmware be less than metal shell to bear.
3rd step, acceleration transducer detects the acceleration of oscillator in real time, and will speed up angle value and give scaling circuit.
4th step, scaling circuit output voltage is to adder, and the output voltage that adder produces is applied to the voltage-controlled input of oscillator, makes oscillator output frequencies produce the change contrary with dither effect, thus reduces the impact of vibration on oscillator output frequencies.
In sum, the present invention proposes a kind of method and apparatus reducing oscillator acceleration effect, effectively can reduce the acceleration effect of oscillator, under reduction oscillator vibration condition, the deterioration degree of phase noise, has very strong practicality and wide application prospect.
Although content of the present invention has done detailed introduction, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention with substitute will be all apparent.Therefore protection scope of the present invention should be limited to the appended claims.
Claims (11)
1. can reduce a device for oscillator acceleration effect, it is characterized in that the device that can reduce oscillator acceleration effect is made up of oscillator, acceleration transducer, acceleration compensation control circuit, resiliency supported and metal shell;
Oscillator is the module that can produce stable output frequency in the quiescent state, has x, y, z tri-axle;
According to actual conditions, as compensated three axles of oscillator, then acceleration transducer adopts three single-axis acceleration sensors or a 3-axis acceleration sensor, and during employing three single-axis acceleration sensors, three single-axis acceleration sensors are mutually vertical; If only need, a direction is compensated, then adopt a single-axis acceleration sensors; Acceleration transducer can adopt micro electronmechanical MEMS sensor; Be rigidly connected between acceleration transducer and oscillator, form oscillator firmware; The output of acceleration transducer is connected with acceleration real-Time Compensation circuit; Acceleration transducer detects the acceleration that oscillator bears in real time, will speed up angle value and gives acceleration compensation circuit;
Metal shell is hermetically-sealed construction, is made up of main body and lid; Main body is hatch frame, has bottom surface and side; Lid is identical with bottom shape, embeds body seal; Oscillator firmware, resiliency supported/be placed in metal shell, resiliency supported contacts with shell, oscillator and spring-loaded contact, and oscillator firmware does not directly contact with shell;
Resiliency supported be a kind of there is elasticity and can produce in 0-100g acceleration situation distortion and the strutting piece of self recovery, g is acceleration of gravity, is 9.8N/kg;
Acceleration compensation circuit and the voltage-controlled input of oscillator have electricity and are connected, and the bucking voltage that acceleration compensation circuit produces is applied on the voltage-controlled input of oscillator; Acceleration compensation circuit can adopt digital compensation circuit, also can adopt analog compensation circuit.
2. can reduce the device of oscillator acceleration effect as claimed in claim 1, it is characterized in that the digital compensation circuit described in it is made up of 1 data stream module, 3 exceptional value screening modules, 3 positive and negative determination modules, 3 negative value processing modules, 3 multipliers, 1 register, 2 adders, 1 D/A converter module;
Data stream module is connected with acceleration transducer by data communication interface, obtains from acceleration transducer the acceleration that current oscillation bears; Data stream module carries out synchronous interpretation to the acceleration obtained, x is obtained according to the data protocol that acceleration transducer carries, y, z-axis acceleration information, by x, y, z-axis acceleration information carries out positive and negative judgement, if negative value is then converted to negative integer form by negative value process, be transferred to the first exceptional value screening module, the second exceptional value screening module, the 3rd exceptional value screening module respectively;
3 exceptional value screening modular structures are the same; The rate of change of the first exceptional value screening module to X-axis acceleration detects, and when detecting that x-axis rate of acceleration change exceedes 1.4 times of actual condition peak acceleration rate of change, then rejects the x-axis accekeration this time detected, still keeps original X-axis accekeration; Second exceptional value screening module sequential according to a preconcerted arrangement, the rate of change of y-axis acceleration is detected, when detecting that y-axis rate of acceleration change exceedes 1.4 times of actual condition peak acceleration rate of change, then reject the y-axis accekeration this time detected, still keep original y-axis accekeration; 3rd exceptional value screening module sequential according to a preconcerted arrangement, the rate of change of z-axis acceleration is detected, when detecting that z-axis rate of acceleration change exceedes 1.4 times of actual condition peak acceleration rate of change, then reject the z-axis accekeration this time detected, still keep original z-axis accekeration;
Register stores x, y, z 3 three weighted values of axle, and each weighted value is by the quotient representation of two integers, and two integers are respectively dividend and divisor, dividend be greater than 0 positive integer, divisor is the integral number power of 2; 6 integers are stored altogether, i.e. x-axis weighted value dividend, x-axis weighted value divisor, y-axis weighted value dividend, y-axis weighted value divisor, z-axis weighted value dividend, z-axis weighted value divisor in register; Register is connected with divider with 3 multipliers;
3 multipliers are all connected with register, first multiplier is connected with the first exceptional value screening module, the first divider, second multiplier is connected with the second exceptional value screening module, the second divider, and the 3rd multiplier is connected with the 3rd exceptional value screening module, the 3rd divider; The x-axis accekeration received from the first exceptional value screening module is multiplied with the x-axis weighted value dividend in register by the first multiplier, and what obtain long-pendingly gives the first divider; The y-axis accekeration received from the second exceptional value screening module is multiplied with the y-axis weighted value dividend in register by the second multiplier, and what obtain long-pendingly gives the second divider; The z-axis accekeration received from the 3rd exceptional value screening module is multiplied with the z-axis weighted value dividend in register by the 3rd multiplier, and what obtain long-pendingly gives the 3rd divider;
3 dividers are connected with multiplier with register respectively, export and are connected to first adder; The long-pending x-axis weighted value divisor stored with register obtained from the first multiplier is divided by by the first divider, and the business obtained gives first adder; The long-pending y-axis weighted value divisor stored with register obtained from the second multiplier is divided by by the second divider, and the business obtained gives first adder; The long-pending x-axis weighted value divisor stored with register obtained from the 3rd multiplier is divided by by the 3rd divider, and the business obtained gives first adder;
First adder is connected with second adder with three dividers, the business obtained from three dividers is added, and gives second adder by result;
Second adder realizes dc point settings and is added with first adder output valve, and dc point settings are set by the user;
D/A converter module is connected with the voltage-controlled end of oscillator with second adder, and the digital value transmitted from second adder is converted to analog voltage, analog voltage is given the voltage-controlled input of oscillator.
3. can reduce the device of oscillator acceleration effect as claimed in claim 1, it is characterized in that the realization of described employing analog circuit is made up of three single-axis acceleration sensors, three scaling circuit, adders; They are mutually vertical for three single-axis acceleration sensors, are rigidly connected with oscillator; Three scaling circuit are connected with x-axis, y-axis, z-axis acceleration transducer respectively; The output of three scaling circuit is connected to the input of adder, and adder also receives outside incoming level, and the output of adder is connected to the voltage-controlled input of oscillator.
4. can reduce the device of oscillator acceleration effect as claimed in claim 1, it is characterized in that the realization of described employing analog circuit is made up of a single-axis acceleration sensors, scaling circuit, an adder; Single-axis acceleration sensors and oscillator rigidity are in succession; Scaling circuit is connected with single-axis acceleration sensors; The output of scaling circuit is connected to the input of adder, and adder also receives outside incoming level, and the output of adder is connected to the voltage-controlled input of oscillator.
5. can reduce the device of oscillator acceleration effect as claimed in claim 1, it is characterized in that the realization of described employing analog circuit is made up of a 3-axis acceleration sensor, scaling circuit, an adder; 3-axis acceleration sensor and oscillator are connected; Scaling circuit is connected with single-axis acceleration sensors; The output of scaling circuit is connected to the input of adder, and adder also receives outside incoming level, and the output of adder is connected to the voltage-controlled input of oscillator.
6. can reduce the device of oscillator acceleration effect as claimed in claim 1, it is characterized in that the range of described acceleration transducer should higher than the actual peak acceleration of bearing of device, the actual peak acceleration of bearing of device is known according to the actual vibration operating mode of device.
7. can reduce the device of oscillator acceleration effect as claimed in claim 1, it is characterized in that described acceleration transducer output and the signal connecting interface of acceleration real-Time Compensation circuit are that wire, cable or pcb board are electrically connected.
8. can reduce the device of oscillator acceleration effect as claimed in claim 1, it is characterized in that described acceleration real-Time Compensation circuit and the signal of telecommunication connecting interface of the voltage-controlled input of oscillator are that wire, cable or pcb board are electrically connected.
9. can reduce the device of oscillator acceleration effect as claimed in claim 1, it is characterized in that described resiliency supported is any one in steel wire rope, rubber blanket, spring, sponge, foam, if resiliency supported is steel wire rope or rubber blanket or spring, then resiliency supported has the fixing structure in two ends, one end is fixed on metal shell, and the other end is fixed on oscillator firmware; If resiliency supported is sponge or foam, be then filled in the space between metal shell and oscillator firmware.
10. the device that can reduce oscillator acceleration effect as claimed in claim 1, to reduce the method for oscillator acceleration effect, is characterized in that comprising the following steps when adopting digital compensation circuit to realize:
The first step, set three weighted values based on experience value, three weighted values are 6 integers, by the order of x-axis weighted value dividend, x-axis weighted value divisor, y-axis weighted value dividend, y-axis weighted value divisor, z-axis weighted value dividend, z-axis weighted value divisor stored in register;
Second step, the metal shell of device bears vibration, and resiliency supported self produces deformation, the acceleration making the actual acceleration born of oscillator firmware be less than metal shell to bear;
3rd step, acceleration transducer detects the acceleration of oscillator in real time, and will speed up angle value and give acceleration compensation circuit;
4th step, acceleration compensation circuit receives the x of acceleration transducer, y, the acceleration of z-axis, and data stream module extracts x, y, z axle acceleration value according to the data protocol that acceleration transducer exports, and delivers to first, second, third positive and negative determination module respectively;
5th step, the first positive and negative determination module carries out positive and negative judgement to x-axis accekeration, if positive number, directly deliver to the first multiplier, if negative, deliver to the first negative value processing module, first negative value processing module carries out negative value process to data, output is given the first exceptional value screening module; Second positive and negative determination module carries out positive and negative judgement to y-axis accekeration, if positive number, directly delivers to the second multiplier, if negative, deliver to the second negative value processing module, the second negative value processing module carries out negative value process to data, output is given the second exceptional value screening module; 3rd positive and negative determination module carries out positive and negative judgement to z-axis accekeration, if positive number, directly delivers to the 3rd multiplier, if negative, deliver to the 3rd negative value processing module, the 3rd negative value processing module carries out negative value process to data, output is given the 3rd exceptional value screening module;
6th step, the first exceptional value screening module carries out exceptional value screening to input data, result is given the first multiplier; Second exceptional value screening module carries out exceptional value screening to input data, result is given the second multiplier; 3rd exceptional value screening module carries out exceptional value screening to input data, result is given the 3rd multiplier;
7th step, the data after exceptional value is screened by the first multiplier are multiplied with the dividend of the x-axis weighted value stored in register, result are given the first divider; Data after exceptional value is screened by the second multiplier are multiplied with the dividend of the y-axis weighted value stored in register, result are given the second divider; Data after exceptional value is screened by the 3rd multiplier are multiplied with the dividend of the z-axis weighted value stored in register, result are given the 3rd divider;
8th step, the divisor of the x-axis weighted value stored in the result that the first multiplier transmits by the first divider and register is divided by, and result is delivered to first adder; The divisor of the y-axis weighted value stored in the result that the second multiplier transmits by the second divider and register is divided by, and result is delivered to first adder; The divisor of the z-axis weighted value stored in the result that the 3rd multiplier transmits by the 3rd divider and register is divided by, and result is delivered to first adder;
9th step, the output of first adder to three dividers is added, and result is delivered to second adder;
Tenth step, the result that first adder transmits by second adder is added with dc point settings, and result is delivered to D/A converter module;
11 step, D/A converter module carries out digital-to-analogue conversion to the output of second adder, obtains corresponding analog voltage, and analog voltage is applied to the voltage-controlled input of oscillator.
11. can reduce the device of oscillator acceleration effect as claimed in claim 1 to reduce the method for oscillator acceleration effect, it is characterized in that comprising the following steps when adopting analog compensation circuit to realize:
The first step, according to the value of the acceleration sensitive coefficient determination scaling circuit of oscillator; Acceleration sensitive coefficient is larger, then ratio value is larger;
Second step, in practical work process, the metal shell of device bears vibration, and resiliency supported self produces deformation, the acceleration making the actual acceleration born of oscillator firmware be less than metal shell to bear;
3rd step, acceleration transducer detects the acceleration of oscillator in real time, and will speed up angle value and give scaling circuit;
4th step, scaling circuit output voltage is to adder, and the output voltage that adder produces is applied to the voltage-controlled input of oscillator, makes oscillator output frequencies produce the change contrary with dither effect, thus reduces the impact of vibration on oscillator output frequencies.
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| CN110855242A (en) * | 2019-11-29 | 2020-02-28 | 电子科技大学 | Voltage variation-based crystal oscillator vibration-resistant compensation device and method |
| CN111082751A (en) * | 2019-12-17 | 2020-04-28 | 中国电子科技集团公司第十三研究所 | Frequency compensation system for crystal oscillator with amplitude phase compensation |
| CN111130458A (en) * | 2019-12-17 | 2020-05-08 | 中国电子科技集团公司第十三研究所 | Frequency compensation system of crystal oscillator based on acceleration compensation technology |
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| CN102075141A (en) * | 2010-12-28 | 2011-05-25 | 单庆晓 | Oven controlled crystal oscillator (OCXO) with acceleration compensation |
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| CN111130458B (en) * | 2019-12-17 | 2023-04-11 | 中国电子科技集团公司第十三研究所 | Frequency compensation system of crystal oscillator based on acceleration compensation technology |
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