CN103322997A - Multiloop encircled superfluid gyroscopic device - Google Patents
Multiloop encircled superfluid gyroscopic device Download PDFInfo
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- CN103322997A CN103322997A CN2013102157690A CN201310215769A CN103322997A CN 103322997 A CN103322997 A CN 103322997A CN 2013102157690 A CN2013102157690 A CN 2013102157690A CN 201310215769 A CN201310215769 A CN 201310215769A CN 103322997 A CN103322997 A CN 103322997A
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Abstract
The invention discloses a multiloop encircled superfluid gyroscopic device and belongs to the technical field of high-precision gyroscopes. The superfluid device comprises a multiloop encircled superfluid interferometer, a temperature control system, a chemical potential energy difference drive system, a displacement detection system and an amplitude locking system. By the adoption of a multiloop encircle technology in a superfluid pipeline, induction area of a superfluid gyro is enlarged, and overall output noise and thermal noise of the superfluid gyro are effectively inhibited. According to the invention, the superfluid gyro is endowed with lower resolution and limiting resolution, and measurement accuracy of the superfluid gyro is raised.
Description
Technical field
The invention discloses a kind of multi-turn around the superfluid gyroscope device, belong to the technical field of high accuracy gyroscope instrument.
Background technology
Inertial navigation system has and does not rely on external information, also not to the outstanding advantages of outside emittance, is one of gordian technique of all kinds of aircrafts of development, guided missile, naval vessel, robot, the contour performance equipment of weapons.Gyroscope is the core sensor of inertial navigation system, is used for the angular motion in responsive motion carrier relative inertness space, and its precision has conclusive effect to the precision of inertial navigation system.Use the advanced technology of the subjects such as physics, materialogy and electronic technology, improve gyrostatic precision, be the emphasis of inertial navigation system research always.
Based on Sagnac effect, matter wave interference has high sensitivity to rotation, utilizes the matter wave interference can Development of New Generation high accuracy gyroscope instrument.
Superfluid gyroscope is that the matter wave interference formula is gyrostatic a kind of.When the normal direction of the turning axle of angular velocity and the induction area of superfluid gyroscope was consistent, superfluid gyroscope can responsive this angular velocity.The induction area of superfluid gyroscope is that its pipeline encloses formed closed area around 1 at present, is approximately 10cm
2About.According to present induction area, total output noise of superfluid gyroscope is
The order of magnitude, thermonoise is
The order of magnitude.
Total output noise of superfluid gyroscope has determined its resolution, and thermonoise has determined its limiting resolution.Since the pipeline of superfluid gyroscope can multi-turn around, therefore its induction area can enlarge so, its total output noise and thermonoise can be suppressed, its precision can further improve.
Summary of the invention
The invention provides a kind of multi-turn around the superfluid gyroscope device, it is by adopting the multi-turn loop technique of superfluid pipeline, enlarged the induction area of superfluid gyroscope device, its total output noise and thermonoise have been carried out establishment, superfluid gyroscope device of the present invention has less resolution and limiting resolution simultaneously, has improved its measuring accuracy.
The present invention adopts following technical scheme: a kind of multi-turn around the superfluid gyroscope device, it includes following structure:
Multi-turn around the superfluid interferometer, described multi-turn around the superfluid interferometer be the core parts of sensitive angular, described interferometer comprise superfluid pipeline, film, rare earth metal and the connection of being connected, part without color filling in the described interferometer is full of superfluid, described superfluid is divided into inner chamber and exocoel, described inner chamber by film and a little less than connect and compose, in described exocoel superfluid pipeline multi-turn around, its induction area
Expand as
, wherein
Representative ring is around the number of turns of pipeline,
Expression superfluid pipeline around radius;
Temperature control system, described temperature control system is controlled to be 2.1616K to the superfluid temperature of exocoel to certain value between the 2.1716K, and keeps constant;
Chemical potential energy differential thermal drive system, the poor drive system of described chemical potential energy control multi-turn around the well heater of superfluid interferometer inner chamber,
The output of the poor drive system of expression chemical potential energy, then the chemical potential energy of superfluid gyroscope is poor is
, and
Scope should satisfy
, wherein
For
4The quality of He atom,
Be the viscosity of common fluid composition,
Become the maximal value of shunt volume for flowing through two weak junctions superfluidity,
Volume factor,
Entropy density,
Be the equivalent thermal resistance of conduction heat between the interior exocoel,
,
With
The density that represents respectively superfluid, common fluid composition and superfluidity composition,
,
Displacement detection system, the displacement to film of displacement detection system detects;
Amplitude locking system, described amplitude locking system control described amplitude locking system control multi-turn around the well heater of superfluid interferometer exocoel, in the superfluid interferometer, produce hot phase shift
, offset the Sagnac phase shift that angular velocity produces
, so that the superfluid phase shift
Keep constant,
The output of expression amplitude locking control system, then hot phase shift is
, wherein
Superfluid gyroscope length,
It is the cross-sectional area around pipeline.
Described multi-turn around total output noise of superfluid gyroscope device
Wherein,
Total output noise of superfluid gyroscope,
Planck's constant,
Film size,
Josephson's frequency,
Two weak asymmetric factors that connect,
Josephson's induction reactance,
To flow through the weak maximum flow that connects,
Total output noise of expression displacement detection system,
It is the survey frequency of superfluid gyroscope.
Described multi-turn around the resolution of superfluid gyroscope device equal described total output noise.
Described multi-turn around the thermonoise of superfluid gyroscope device
Wherein,
The thermonoise of superfluid gyroscope,
Boltzmann constant,
The quantity of weak junction micropore.
Described multi-turn around the limiting resolution of superfluid gyroscope device equal described thermonoise.
The present invention has following beneficial effect:
(1) can guarantee that the superfluid gyroscope device has stable duty, when superfluid gyroscope device pipeline be 100 around the number of turns time, its resolution is
, limiting resolution is
What (2) in contrast to pipeline is 1 o'clock around the number of turns, and its resolution improves 2 orders of magnitude, and limiting resolution improves 1 order of magnitude, and its precision is effectively improved;
(3) with respect to the optical gyroscope of equal induction area, its resolution exceeds approximately 10 orders of magnitude than optical gyroscope.
Description of drawings
Fig. 1 be multi-turn of the present invention around the structural representation of superfluid gyroscope device.
Fig. 2 be multi-turn of the present invention around the superfluid gyroscope device to the inhibition figure of total output noise.
Fig. 3 be multi-turn of the present invention around the superfluid gyroscope device to the inhibition figure of thermonoise.
Wherein:
1,2-is weak to be connected; 3,4-well heater; The 5-film; The hard interlayer of 6-; The 7-rare earth metal; The 8-pick-up loop; The 9-input coil; The 10-superconducting quantum interference device (SQUID).
Embodiment
Please refer to Fig. 1 and in conjunction with Fig. 2 to shown in Figure 3, multi-turn of the present invention around the superfluid gyroscope device comprise multi-turn around the poor drive system of superfluid interferometer, temperature control system, chemical potential energy, displacement detection system and amplitude locking system.
Multi-turn around the superfluid interferometer be the core parts of sensitive angular.The main composition element of interferometer has: superfluid pipeline, film 5, rare earth metal 7 and the connection 1,2 of being connected.Part without color filling in the interferometer is full of superfluid.Superfluid is divided into inner chamber and exocoel, inner chamber by film 5 and a little less than connect and compose, remainder has consisted of exocoel.
With
Represent respectively two weak superfluid phase differential that connect both sides, so angular velocity vector
With hot phase shift so that
With
Between produce phase shift
(1)
In the formula (1),
Expression
The Sagnac phase shift that produces,
The hot phase shift that the expression well heater produces,
Be the induction area vector,
,
With
The size of vector,
The angle between vector, wherein
Direction is that turning axle points to,
Direction is the induction area normal direction,
For
4The quality of He atom,
Be Planck's constant.
Under the poor effect of chemical potential energy, Josephson effect occurs in two weak junctions in the superfluidity composition, produces the two-way matter wave
With
, wherein, subscript 1 connects a little less than representing respectively two with being connected,
The maximal value of weak junction flow is flow through in expression,
Josephson's frequency,
It is the time.Total matter wave
, its amplitude
With
Between the pass be:
(3)
In the formula (3),
Representative ring is around the number of turns of pipeline,
Expression superfluid pipeline around radius.
Temperature control system is controlled to be 2.1616K to the superfluid temperature of exocoel to certain value between the 2.1716K, and keeps constant.
The poor drive system control heater 3 of chemical potential energy,
The output of the poor drive system of expression chemical potential energy, then the chemical potential energy of superfluid gyroscope is poor is
In the formula (4),
Be the viscosity of common fluid composition,
Volume factor,
Entropy density,
Be the equivalent thermal resistance of conduction heat between the interior exocoel,
,
With
The density that represents respectively superfluid, common fluid composition and superfluidity composition,
,
The effect of displacement detection system is that the displacement to film detects.In the superfluid interferometer, the surface of film is with a rare earth metal, and this metal can produce magnetic field.When the film change in displacement, the magnetic field between film and the pick-up loop changes.Because electromagnetic induction principle can produce faradic variation in the circuit of pick-up loop, so at this moment input coil can produce the variation of magnetic flux.Superconducting quantum interference device (SQUID) has the ability that detects minimum flux change, can be calculated the variation of film displacement by the output of superconducting quantum interference device (SQUID), can obtain thus film apart from the displacement of its initial position
Right
Carry out Fast Fourier Transform (FFT), calculate
Amplitude
,
With
The pass be:
(5)
Amplitude locking system control heater 4 produces hot phase shift in the superfluid interferometer
, offset the Sagnac phase shift that angular velocity produces
, so that the superfluid phase shift
Keep constant.
The output of expression amplitude locking control system, then hot phase shift is:
In the formula (6),
The inner length of superfluid interferometer,
It is the cross-sectional area of superfluid pipeline.
Getting signal to noise ratio (S/N ratio) is 1, total output noise of superfluid gyroscope
Determined its resolution
, namely
(7)
In the expression superfluid interferometer around the number of turns, total output noise of superfluid gyroscope is:
(9)
In the formula (9),
Total output noise of superfluid gyroscope,
Planck's constant,
Film size,
Josephson's frequency,
Two weak asymmetric factors that connect,
Josephson's induction reactance,
To flow through the weak maximum flow that connects,
Total output noise of expression displacement detection system,
It is the survey frequency of superfluid gyroscope.
The thermonoise of superfluid gyroscope is:
(10)
In the formula (10),
The thermonoise of superfluid gyroscope,
Boltzmann constant,
The quantity of weak junction micropore.
Film size is set
, the angle of angular velocity vector and area vector
, asymmetric factor
, the micropore quantity of weak junction
, the superfluid pipeline around radius
, flow through the weak maximum flow that connects
, the cross-sectional area of superfluid pipeline
, superfluid length
, the Measurement bandwidth of superfluid gyroscope
In addition, under the effect of temperature control system, outer cavity temperature
Under the effect of the poor drive system of chemical potential energy, chemical potential energy is poor
Under the effect of amplitude locking system, the superfluid phase shift
Arrange the superfluid pipeline around the scope of the number of turns between 1 to 100, multi-turn around superfluid gyroscope to the inhibition of total output noise and thermonoise as shown in Figures 2 and 3.
Among Fig. 2, along with the increase of superfluid pipeline around the number of turns, total output noise is the trend that reduces gradually.The number of turns is 1 o'clock, and total output noise is
The number of turns is 100 o'clock, and total output noise is
So total output noise has been reduced 2 orders of magnitude.
Among Fig. 3, along with the increase of superfluid pipeline around the number of turns, thermonoise is the trend that reduces gradually.The number of turns is 1 o'clock, and thermonoise is
The number of turns is 100 o'clock, and thermonoise is
So thermonoise has been reduced 1 order of magnitude.
In sum, the designed multi-turn of the present invention around the superfluid gyroscope device can carry out establishment to total output noise and thermonoise.When the superfluid gyroscope pipeline be 100 around the number of turns time, its resolution is
, limiting resolution is
What in contrast to pipeline is 1 o'clock around the number of turns, and its resolution improves 2 orders of magnitude, and limiting resolution improves 1 order of magnitude, and its precision is effectively improved.
The above only is preferred implementation of the present invention, should be pointed out that for those skilled in the art, can also make some improvement under the prerequisite that does not break away from the principle of the invention, and these improvement also should be considered as protection scope of the present invention.
Claims (5)
- A multi-turn around the superfluid gyroscope device, it is characterized in that: it includes following structure:Multi-turn around the superfluid interferometer, described multi-turn around the superfluid interferometer be the core parts of sensitive angular, described interferometer comprise superfluid pipeline, film, rare earth metal and the connection of being connected, part without color filling in the described interferometer is full of superfluid, described superfluid is divided into inner chamber and exocoel, described inner chamber by film and a little less than connect and compose, in described exocoel superfluid pipeline multi-turn around, its induction area Expand as , wherein Representative ring is around the number of turns of pipeline, Expression superfluid pipeline around radius;Temperature control system, described temperature control system is controlled to be 2.1616K to the superfluid temperature of exocoel to certain value between the 2.1716K, and keeps constant;Chemical potential energy differential thermal drive system, the poor drive system of described chemical potential energy control multi-turn around the well heater of superfluid interferometer inner chamber, The output of the poor drive system of expression chemical potential energy, then the chemical potential energy of superfluid gyroscope is poor is , and Scope should satisfy , wherein For 4The quality of He atom, Be the viscosity of common fluid composition, Become the maximal value of shunt volume for flowing through two weak junctions superfluidity, Volume factor, Entropy density, Be the equivalent thermal resistance of conduction heat between the interior exocoel, , With The density that represents respectively superfluid, common fluid composition and superfluidity composition, ,Displacement detection system, the displacement to film of displacement detection system detects;Amplitude locking system, described amplitude locking system control described amplitude locking system control multi-turn around the well heater of superfluid interferometer exocoel, in the superfluid interferometer, produce hot phase shift , offset the Sagnac phase shift that angular velocity produces , so that the superfluid phase shift Keep constant, The output of expression amplitude locking control system, then hot phase shift is , wherein Superfluid gyroscope length, It is the cross-sectional area around pipeline.
- Multi-turn as claimed in claim 1 around the superfluid gyroscope device, it is characterized in that: described multi-turn around total output noise of superfluid gyroscope deviceWherein, Total output noise of superfluid gyroscope, Planck's constant, Film size, Josephson's frequency, Two weak asymmetric factors that connect, Josephson's induction reactance, To flow through the weak maximum flow that connects, Total output noise of expression displacement detection system, It is the survey frequency of superfluid gyroscope.
- Multi-turn as claimed in claim 2 around the superfluid gyroscope device, it is characterized in that: described multi-turn around the resolution of superfluid gyroscope device equal described total output noise.
- Multi-turn as claimed in claim 4 around the superfluid gyroscope device, it is characterized in that: described multi-turn around the limiting resolution of superfluid gyroscope device equal described thermonoise.
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103954273A (en) * | 2014-03-25 | 2014-07-30 | 南京航空航天大学 | Superfluid gyroscope apparatus based on pressure phase shift assisting |
CN104535058A (en) * | 2014-11-25 | 2015-04-22 | 中国人民解放军装备学院 | Genetic optimization-based superfluid gyroscope control system design method |
CN104613953A (en) * | 2014-11-25 | 2015-05-13 | 中国人民解放军装备学院 | Method for improving superfluid gyroscope angular rate measurement accuracy |
CN105066982A (en) * | 2015-07-27 | 2015-11-18 | 中国人民解放军装备学院 | Superfluid gyroscope apparatus based on cold atom gas quantum vortex |
CN105066981A (en) * | 2015-07-27 | 2015-11-18 | 中国人民解放军装备学院 | Superfluid gyroscope apparatus based on light wave thermal compensation |
CN112462085A (en) * | 2020-11-17 | 2021-03-09 | 吉林大学 | Electrochemical fluid gyroscope |
CN112963495A (en) * | 2021-03-03 | 2021-06-15 | 哈尔滨工业大学 | Strain gauge and piezoelectric ceramic combined magnetic noise suppression active vibration isolation device |
-
2013
- 2013-06-03 CN CN2013102157690A patent/CN103322997A/en active Pending
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103954273A (en) * | 2014-03-25 | 2014-07-30 | 南京航空航天大学 | Superfluid gyroscope apparatus based on pressure phase shift assisting |
CN103954273B (en) * | 2014-03-25 | 2017-04-12 | 南京航空航天大学 | Superfluid gyroscope apparatus based on pressure phase shift assisting |
CN104535058A (en) * | 2014-11-25 | 2015-04-22 | 中国人民解放军装备学院 | Genetic optimization-based superfluid gyroscope control system design method |
CN104613953A (en) * | 2014-11-25 | 2015-05-13 | 中国人民解放军装备学院 | Method for improving superfluid gyroscope angular rate measurement accuracy |
CN105066982A (en) * | 2015-07-27 | 2015-11-18 | 中国人民解放军装备学院 | Superfluid gyroscope apparatus based on cold atom gas quantum vortex |
CN105066981A (en) * | 2015-07-27 | 2015-11-18 | 中国人民解放军装备学院 | Superfluid gyroscope apparatus based on light wave thermal compensation |
CN105066981B (en) * | 2015-07-27 | 2017-10-03 | 中国人民解放军装备学院 | A kind of superfluid gyroscope device based on light wave thermal compensation |
CN112462085A (en) * | 2020-11-17 | 2021-03-09 | 吉林大学 | Electrochemical fluid gyroscope |
CN112963495A (en) * | 2021-03-03 | 2021-06-15 | 哈尔滨工业大学 | Strain gauge and piezoelectric ceramic combined magnetic noise suppression active vibration isolation device |
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Application publication date: 20130925 |