CN105066981A - Superfluid gyroscope apparatus based on light wave thermal compensation - Google Patents
Superfluid gyroscope apparatus based on light wave thermal compensation Download PDFInfo
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- CN105066981A CN105066981A CN201510445434.7A CN201510445434A CN105066981A CN 105066981 A CN105066981 A CN 105066981A CN 201510445434 A CN201510445434 A CN 201510445434A CN 105066981 A CN105066981 A CN 105066981A
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- superfluid
- thermal compensation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
Abstract
The present invention discloses a superfluid gyroscope apparatus based on light wave thermal compensation. The superfluid gyroscope apparatus comprises a thermal drive system, an annular cavity interference system, a displacement detection system, a control treatment system and a thermal compensation system. According to the present invention, according to the light wave thermal phase generating principle, the amplitude value locking type superfluid gyroscope apparatus based on the light wave thermal compensation is designed, such that the delaying time of the thermal phase injection is effectively reduced, and the measurement precision and the dynamic performance of the superfluid gyroscope are improved; and the present invention belongs to the technical field of the novel ultra-high-precision quantum gyroscope, and the superfluid gyroscope apparatus can be used for the superfluid gyroscope scheme design based on the Josephson effect.
Description
Technical field
The invention belongs to novel super-high precision quantum gyroscope technology field, can be applicable to the superfluid gyroscope conceptual design based on Josephson effect.
Technical background
Gyro, as main inertial navigation instrument, occurs so far from 19 end of the centurys, all plays an important role in military, civilian field.Classical spinning top principle of work rotates by mechanical rotor the angular motion producing the responsive gyro relative inertness space of the momentum moment.Along with the maturation of optical technology, use the Gyros of optical interference effects to arise at the historic moment, this typical gyro based on new mechanism has laser gyro and optical fibre gyro.Be subject to people at gyroscope to pay attention to and while being used widely, people start to attempt to find more high precision, more highly sensitive navigation instrument.In recent years along with the rise of cryogenic technique, the gyro based on low temperature physics quantum theory starts to enter people's sight line, and the superfluid gyroscope grown up on this basis starts the visual field entering people.
Proposed by California, USA university Berkeley
4two Weak link superfluid gyroscopes that He superfluid exchanges Joseph effect precision, volume, temperature requirement and affected by noise etc. in there is huge advantage.The sensitivity of this device can arrive in theory
highly sensitive 9 ~ 10 orders of magnitude about than optical fibre gyro under same sensitive area condition.The type gyro achieves no small progress in physical basis and experimental verification, but whole research work is still in initial stage.
4two Weak link superfluid gyroscope principles of He superfluid ac josephson effect also exist contradiction between high sensitivity and range ability.For this problem, existing method is by setting working point phase place in advance, injected by hot phase place and realize thermal compensation, but what hot phase place injected employing is copper nickel heating resistor, in fact its temperature-rise period can be approximately first order inertial loop, then the injection of hot phase place will exist inertial delay, and this can not be locked in target location by directly causing the amplitude of superfluid gyroscope, even there is the unstability of superfluid gyroscope system, directly affect accuracy of detection and the dynamic property of superfluid gyroscope.Although can intelligent control algorithm be passed through in theory, improve the dynamic property of system, reduce the delayed impact that gyrosystem is measured of temperature rise, fundamentally can not solve heating resistor temperature rise lag issues all the time.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome in superfluid amplitude locking means, adopt Heated Copper nickel resistance to carry out hot phase place and inject the stability of inertial delay on superfluid gyroscope and the impact of precision that exist, propose a kind of superfluid gyroscope device based on light wave thermal compensation, by expectation film amplitude and membrane displacement detected amplitude are compared process, the infrared light controlling to export certain power is used for realizing superfluid temperature rise, thus realize the injecting compensating of hot phase place, effectively reduce the time delay that hot phase place is injected, improve the measuring accuracy of superfluid gyroscope.
Technical solution of the present invention is: a kind of superfluid gyroscope device based on light wave thermal compensation, comprises thermal drivers system, ring cavity interference system, displacement detection system, control treatment system, thermal compensation system;
Ring cavity interference system comprises annular interference loop, is full of superfluid, it is characterized in that in described annular interference loop: be provided with ring cavity upper open end in upper end, annular interference loop, be connected with hot actuating device; Be provided with ring cavity lower open end in lower end, annular interference loop, be connected with fexible film; In annular interference loop, side is provided with ring cavity branch end, is connected with thermal compensation device; Left Weak link dividing plate and right Weak link dividing plate is provided with in annular interference loop symmetric position;
Displacement detection system comprises superconductive lead film metallic coating, battery lead plate and superconduction detection coil; Described superconductive lead film metallic coating, for characterizing the change in displacement of film, when film produces displacement, drives the motion of superconductive lead film; Battery lead plate is for generation of initial electric field, and membrane displacement change causes the magnetic field between plumbous film and battery lead plate to change; Superconduction detection coil for detecting flux change, and then obtains the displacement of film indirectly;
Control treatment system comprises controller, laser instrument and optical splitter composition, and described controller is used for the membrane displacement amplitude detected and expects amplitude com parison, generates controlled quentity controlled variable; Described laser instrument, for receiving steering order, launches the infrared waves with certain frequency; Described optical splitter is for generation of the switching signal adding thermo-optical and the corresponding trigger of generation of thermal compensation system.
Thermal drivers system, left side is provided with copper nickel heating resistor, and right side is provided with scale copper temperature adjustment groove, and downside is provided with atrium, under shed chamber with the upper open end of left Weak link dividing plate with the annular interference loop of right Weak link dividing plate be housed be connected.Thermal compensation system, left side is provided with scale copper temperature adjustment groove, and downside is provided with atrium and controlled valve, and described controlled valve is open state under the triggering of light wave.
Superfluid gyroscope device is being subject in loop checking installation, producing rotation phase difference under the impact of extraneous turning rate input
the loop checking installation of light wave thermal compensation system to superfluid gyroscope system injects hot phase place
wherein ω is extraneous input angular velocity, and h is Planck's constant, A superfluid gyroscope sensitive area, m
4for
4the atomic mass of He; η is the viscosity of permanent current body, ρ
nfor permanent current volume density, ρ is total fluid density, and Δ T is the temperature difference that light wave thermal effect causes in pipeline, and s is the entropy of unit mass, and l is length of pipe, and R is pipeline width.
Control treatment system is by controlling the hot phase delta phi of compensation of thermal compensation system
laser, offset the rotation phase Δ φ caused by extraneous input angular velocity
s, make the superfluid phase delta phi in loop checking installation
allkeep constant, then superfluid mass rate amplitude I=2NI
c0| cos (Δ φ
all) | constant, in formula, N is micropore number, I
c0for superfluid swallowing-capacity, then measured angular velocity amplitude is
The solution of the present invention is compared with existing scheme, and major advantage is:
Existing superfluid gyroscope amplitude locking scheme takes copper nickel resistance heated to inject to realize hot phase place, because resistance temperature rise postpones existence, not easily accurate temperature controlling, the present invention adopts infrared heating, temperature controls easily, do not need warming-up, and comparatively have a security and there is penetration power, heat inside and outside energy simultaneously, thermal inertia is little and intensification is rapid, be convenient to the change of the extraneous angular velocity of quick sensing, sensitivity is higher, effectively reduce the time delay that hot phase place is injected simultaneously, compare the superfluid gyroscope device compensated based on copper nickel heating resistor, its amplitude locking effect is better, improve measuring accuracy and the dynamic property of gyro.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention is based on light wave thermal compensation superfluid gyroscope device;
Fig. 2 is the schematic diagram of thermal compensation device.
Specific embodiments
As shown in Figure 1, this light wave thermal compensation superfluid gyroscope device, comprises thermal drivers system, ring cavity interference system, displacement detection system, control treatment system, thermal compensation system.It is characterized in that: thermal drivers system mainly comprises, copper nickel heating resistor 1 and scale copper temperature adjustment groove 2, ring cavity interference system comprises annular interference loop 3, ring cavity upper open end 4, ring cavity lower open end 5 and ring cavity branch end 6, left Weak link dividing plate 7 and right Weak link dividing plate 8, wherein ring cavity upper open end is connected with thermal drivers system, lower open end installs fexible film 9, ring cavity branch end and thermal compensation system form, Weak link two ends are made to produce temperature difference and pressure differential by heating resistor, if drive superfluid to flow through the junction of dividing plate, there is Josephson effect, now film vibrates with fixed amplitude, when extraneous input angular velocity exists, film amplitude will be changed by angular velocity information modulation.Displacement detection system is made up of the superconductive lead film metallic coating 10 of film surface, battery lead plate 11 and superconduction detection coil 12, when film produces displacement, drive the motion of superconductive lead film, the magnetic field between plumbous film and battery lead plate is caused to change, superconduction detection Coil Detector flux change, and then indirectly obtain the displacement of film.Control treatment system is made up of controller, laser instrument and optical splitter, and by expectation film amplitude and displacement detecting amplitude are compared process, controller controls the infrared light of Laser output certain frequency.This infrared light projects thermal compensation system through optical splitter rear portion, and this thermal compensation system is made up of scale copper temperature adjustment groove 13 and controlled valve 14; Another part control trigger opens controlled valve, when producing film amplitude deviation, makes thermal compensation system produce temperature difference by photo-thermal effect.Controlled valve is opened just to compensate in loop checking installation and is injected hot phase place, realizes the film amplitude locking of superfluid gyroscope.
Fig. 2 is thermal compensation systematic schematic diagram, is filled with the liquid state being in 2.172K temperature in thermal compensation system
4he, mineralization pressure difference Δ P=ρ s Δ T in tube chamber is caused after being subject to infrared heating, the existence of pressure differential makes will to form the reverse flow of superfluid and permanent current body in pipeline, wherein permanent current body shows as left-hand right side flow under differential pressure action, superfluid is reversed flow then, and the flow velocity of permanent current body is expressed as v
n=R
2Δ P/8 η l, in pipeline, permanent current body and superfluid flowing meet v
sρ
s=v
nρ
nin liquid He, superfluid matter wave phase place and flow velocity relation are: v
s=h Δ φ/2 π m
4.
The hot phase place that then infrared heating produces is:
Wherein ω is input angular velocity, and h is Planck's constant, A superfluid gyroscope sensitive area, m
4for
4the atomic mass of He; η is the viscosity of permanent current body, ρ
nfor permanent current volume density, ρ is total fluid density, and Δ T is the temperature difference at pipeline two ends, and s is the entropy of unit mass, and l is length of pipe, and R is pipeline width.Superfluid gyroscope device is being subject to producing rotation phase Δ φ under the impact of extraneous angular velocity
s=4 π m
4ω A/h, control treatment system is by controlling the hot phase delta phi of compensation of thermal compensation system
laser, offset the rotation phase Δ φ caused by extraneous input angular velocity
s, make the superfluid phase delta phi in loop checking installation
allkeep constant, then superfluid mass rate amplitude I=2NI
c0| cos (Δ φ
all) | constant, in formula, N is micropore number, I
c0for superfluid swallowing-capacity, then measured angular velocity amplitude is
Visible angular velocity resolve directly and temperature difference T-phase is closed, compared to the superfluid gyroscope device that copper nickel heating resistor compensates, the existence that its temperature rise postpones and not easily accurate temperature controlling, the infrared heating that the present invention adopts, temperature controls easily, not need warming-up thermal inertia little and heats up rapidly, and be convenient to the change of the extraneous angular velocity of quick sensing, sensitivity is higher, its amplitude locking effect is better, and the measuring accuracy of gyro is higher.
The content be not described in detail in present disclosure belongs to the known prior art of professional and technical personnel in the field.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1., based on a superfluid gyroscope device for light wave thermal compensation, comprise thermal drivers system, ring cavity interference system, displacement detection system, control treatment system, thermal compensation system;
Ring cavity interference system comprises annular interference loop, is full of superfluid, it is characterized in that in described annular interference loop: be provided with ring cavity upper open end in upper end, annular interference loop, be connected with hot actuating device; Be provided with ring cavity lower open end in lower end, annular interference loop, be connected with fexible film; In annular interference loop, side is provided with ring cavity branch end, is connected with thermal compensation device; Left Weak link dividing plate and right Weak link dividing plate is provided with in annular interference loop symmetric position;
Displacement detection system comprises superconductive lead film metallic coating, battery lead plate and superconduction detection coil; Described superconductive lead film metallic coating, for characterizing the change in displacement of film, when film produces displacement, drives the motion of superconductive lead film; Battery lead plate is for generation of initial electric field, and membrane displacement change causes the magnetic field between plumbous film and battery lead plate to change; Superconduction detection coil for detecting flux change, and then obtains the displacement of film indirectly;
Control treatment system comprises controller, laser instrument and optical splitter composition, and described controller is used for the membrane displacement amplitude detected and expects amplitude com parison, generates controlled quentity controlled variable; Described laser instrument, for receiving steering order, launches the infrared waves with certain frequency; Described optical splitter is for generation of the switching signal adding thermo-optical and the corresponding trigger of generation of thermal compensation system.
2. the superfluid gyroscope device based on light wave thermal compensation according to claim 1, it is characterized in that: described hot actuating device, left side is provided with copper nickel heating resistor, right side is provided with scale copper temperature adjustment groove, downside is provided with atrium, under shed chamber with the upper open end of left Weak link dividing plate with the annular interference loop of right Weak link dividing plate be housed be connected.
3. the superfluid gyroscope device based on light wave thermal compensation according to claim 1, it is characterized in that: described thermal compensation system, left side is provided with scale copper temperature adjustment groove, and downside is provided with atrium and controlled valve, and described controlled valve is open state under the triggering of light wave.
4. the method for the superfluid gyroscope measurement device angular velocity based on light wave thermal compensation according to claim 1, is characterized in that: described superfluid gyroscope device is being subject in loop checking installation, producing rotation phase difference under the impact of extraneous turning rate input
light wave thermal compensation system is to the hot phase place of loop checking installation injecting compensating of superfluid gyroscope system
wherein ω is extraneous input angular velocity, and h is Planck's constant, A superfluid gyroscope sensitive area, m
4for
4the atomic mass of He; η is the viscosity of permanent current body, ρ
nfor permanent current volume density, ρ is total fluid density, and Δ T is the temperature difference that light wave thermal effect causes in pipeline, and s is the entropy of unit mass, and l is length of pipe, and R is pipeline width.
5. the method for the superfluid gyroscope measurement device angular velocity based on light wave thermal compensation according to claim 1, is characterized in that: control treatment system is by controlling the hot phase delta phi of compensation of thermal compensation system
laser, offset the rotation phase Δ φ caused by extraneous input angular velocity
s, make the superfluid phase delta phi in loop checking installation
allkeep constant, then superfluid mass rate amplitude I=2NI
c0| cos (Δ φ
all) | constant, in formula, N is micropore number, I
c0for superfluid swallowing-capacity, then measured angular velocity amplitude is
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| CN105716598A (en) * | 2016-02-03 | 2016-06-29 | 中国人民解放军装备学院 | BEC quantum vortex gyro implementation method based on active control |
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| CN105716599B (en) * | 2016-02-03 | 2018-09-21 | 中国人民解放军装备学院 | A kind of quantum interference method based on room temperature BEC coherence vortex superposition states |
| CN109556591A (en) * | 2018-11-22 | 2019-04-02 | 华中科技大学 | A kind of passive type lasergyro based on super stabilized laser |
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| CN109556591A (en) * | 2018-11-22 | 2019-04-02 | 华中科技大学 | A kind of passive type lasergyro based on super stabilized laser |
| CN109556591B (en) * | 2018-11-22 | 2020-09-18 | 华中科技大学 | Passive laser gyroscope based on ultrastable laser |
| WO2020142140A1 (en) * | 2019-01-02 | 2020-07-09 | Kutztown University Of Pennsylvania | Rotation sensing and magnetometry using localization on a ring shaped lattice |
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