CN201772882U - Thermal insulation device used in fiber optic gyroscope - Google Patents
Thermal insulation device used in fiber optic gyroscope Download PDFInfo
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- CN201772882U CN201772882U CN2010202492807U CN201020249280U CN201772882U CN 201772882 U CN201772882 U CN 201772882U CN 2010202492807 U CN2010202492807 U CN 2010202492807U CN 201020249280 U CN201020249280 U CN 201020249280U CN 201772882 U CN201772882 U CN 201772882U
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Abstract
The utility model belongs to a thermal insulation device, particularly relates to a thermal insulation device used in a fiber optic gyroscope, which comprises an upper thermal shield and a lower thermal shield, wherein the lower thermal shield is arranged on a base; and the upper thermal shield and the lower thermal shield are closely butted with each other to form a closed inner chamber. The thermal insulation device has the benefits that a thermal insulation layer is additionally arranged to create an environment with relatively constant temperature for the optic fiber gyroscope, so as to avoid temperature drifting of the optic fiber gyroscope.
Description
Technical field
The utility model belongs to heat-proof device, is specifically related to a kind of heat-proof device that is used for fibre optic gyroscope.
Background technology
Temperature drift is the most thorny issue in the optical fibre gyro.Because reciprocity, two backpropagation light paths are identical in the fibre ring interferometer, but only this just strict establishment when light path does not change in time.When one section optical fiber exists the time varying temperature disturbance in the fiber optic coils, unless this section optical fiber is positioned at the coil middle part, otherwise because two beam reversal's wave travels are at this section of different time process optical fiber, because of different phase shifts is experienced in thermal perturbation, thereby between the light path of two reverse transfer, introduced the nonreciprocity phase differential.The nonreciprocity phase differential that this temperature causes is called the Shupe error, is at first proposed by D.M.Shupe.The Shupe error is the principal element that causes optical fibre gyro temperature drift.Consider a Fibre Optical Sensor ring that length is L, the Shupe error can be expressed as:
Can see by (1), because Δ φ
E(z)=-Δ φ
E(L-z), if therefore relatively in the optical fiber thermal perturbation on point-symmetric two sections optical fiber identical, then the phase error that causes of temperature will be cancelled; Simultaneously, the phase error brought of temperature and the rate of temperature change on this section optical fiber
And the weight factor relevant with the position (L-2z) is relevant.
By adopting four extremely symmetrical windings, can make in the fiber optic loop about in point-symmetric optical fiber press close to mutually, can effectively reduce the influence of temperature transient effect, compare with common winding, its reduce factor approximate greatly the number of plies square.At Frigo, in the article of N.J. " Compensationof Linear Sources of Non-Reciprocity in SagnacInterferometers " (SPIE MS8 pp.302-305) four extremely symmetrical windings have been carried out detailed argumentation.
Although four extremely symmetrical windings can effectively reduce the temperature drift of optical fibre gyro, even if but the desirable fiber optic loop of coiling, because optical fiber itself can not be unlimited thin, two sections optical fiber pressing close to mutually still have remaining position asymmetry, and this asymmetry is limited by the length of single fiber optic loop.Especially the high-precision optical fiber gyro big for diameter, that coil is long, four extremely symmetrical windings still are not enough to provide the precision of system requirements.For this reason, can carry out particular design, with the temperature stability (with reference to U.S. Pat 005668908A) of improving optical fiber to the protective sleeve of optical fiber; Perhaps mix changing its thermal conductivity and glass temperature fiber optic loop being solidified glue, thereby improve the temperature performance (with reference to U.S. Pat 005546482) of fiber optic loop.
Above-mentioned innovative approach is all started with from improving the fiber optic loop thermal adaptability, does not have to consider to take measures to improve the local temperature environment of optical fibre gyro.From (1) formula as can be seen, if can take measures to reduce rate of temperature change on the fiber optic loop
Also be good for reducing the Shupe error.
Summary of the invention
The purpose of this utility model is at the prior art defective, transmits the heat-proof device that promotes the optical fibre gyro temperature drift characteristic thereby provide a kind of by isolating optical fibre gyro heat.
The utility model is achieved in that a kind of heat-proof device that is used for fibre optic gyroscope, comprises heat shield and following heat shield, and following heat shield is installed on the pedestal, upper and lower heat shield closed butt joint, the inner chamber of a sealing of formation.
Aforesaid a kind of heat-proof device that is used for fibre optic gyroscope, the described heat shield of going up is formed attached to covering in the gyroscope shielding by last thermofin, and following heat shield is gone up by cover under thermofin shields attached to gyroscope down and is formed.
Aforesaid a kind of heat-proof device that is used for fibre optic gyroscope is provided with heat insulating mattress between last heat shield and pedestal.
Aforesaid a kind of heat-proof device that is used for fibre optic gyroscope, last heat shield comprises the heat insulation cover of going up that separates with shell, following heat shield comprises the heat insulation cover down that separates with shell, and heat insulation upward cover and heat insulation cover down closely are connected to form cavity, and this cavity is used to lay optical fibre gyro.
Aforesaid a kind of heat-proof device that is used for fibre optic gyroscope, last heat shield comprise cover in the gyroscope external shield of arranging successively, go up in insulating sandwich and the gyroscope inner screening and cover, and the three closely is connected to form " interlayer " structure; Following heat shield comprises cover under the gyroscope external shield of arranging successively, following insulating sandwich and gyroscope inner screening cover down, and its building method and last heat shield are similar.
Aforesaid a kind of heat-proof device that is used for fibre optic gyroscope, the described material of going up insulating sandwich and following insulating sandwich can be the same or different.
Aforesaid a kind of heat-proof device that is used for fibre optic gyroscope, the temperature conductivity of the material of described upward insulating sandwich and following insulating sandwich is smaller or equal to 2W/mK.
Aforesaid a kind of heat-proof device that is used for fibre optic gyroscope, the described thickness of insulating sandwich and following insulating sandwich of going up is more than or equal to 1mm.
Effect of the present utility model is: by increasing thermofin optical fibre gyro is in the constant relatively environment of temperature, thereby has avoided the temperature drift of optical fibre gyro.
Description of drawings
Fig. 1 is the structural representation of the heat-proof device that is used for fibre optic gyroscope that provides of the utility model;
Fig. 2 is the structural representation that adopts the heat-proof device of one deck radome;
Fig. 3 is the structural representation that is directly installed on the heat-proof device on the pedestal;
Fig. 4 is the structural representation that forms the heat-proof device of cavity separately.
Among the figure: 1. fiber optic loop, the 2.Y waveguide is 3. covered in the gyroscope external shield, 4. cover in the gyroscope inner screening, 5. go up insulating sandwich, 6. descend insulating sandwich, 7. the gyroscope external shield is covered down, and 8. the gyroscope inner screening is covered down, 9. pedestal, 10. cover is gone up in gyroscope shielding, thermofin on 11., and the shielding of 12. gyroscopes is cover down, 13. following thermofin, 14. heat insulating mattress, the 15. heat insulation covers of going up, 16. the gyroscope radome, 17. fibre optic gyroscopes, 18. heat insulation covers down.
Embodiment
Below in conjunction with accompanying drawing the utility model is specified.
As shown in Figure 1, a kind of heat-proof device that is used for fibre optic gyroscope comprises heat shield and following heat shield.Wherein going up heat shield comprises: cover 3 in the gyroscope external shield, go up in insulating sandwich 5 and the gyroscope inner screening and cover 4, wherein in the gyroscope external shield in cover 3 and the gyroscope inner screening shape of cover 4 determine according to the specific requirement of fibre optic gyroscope.In the general gyroscope external shield in cover 3 and the gyroscope inner screening shape of cover 4 be rectangle.It is corresponding to cover 4 shapes in last insulating sandwich 5 and the gyroscope external shield in cover 3 and the gyroscope inner screening, its both sides respectively with the gyroscope external shield in cover 3 and the gyroscope inner screening cover 4 fit tightly formation " sandwich " type structure, laminating type can adopt method bonding or that other is suitable, must guarantee cracking or distortion not to take place in conjunction with closely reliable.Following heat shield has comprised cover 7 under the gyroscope external shield, following insulating sandwich 6 and gyroscope inner screening cover 8 down, and its building method is identical with last heat shield.The closed butt joint of upper and lower heat shield palpus, the inner chamber of a sealing of formation, thermally sensitive device in the optical fibre gyros such as general placement fiber optic loop 1, multi-functional integration Y wave guide 2 also may be placed parts such as other optical device or circuit as required in the chamber.Generally speaking, should keep wire hole, connector in the appropriate location of closed cavity, or lead terminal, with convenient gyrostatic use.
Except that above-described structure, the heat-proof device among the application also has other structure, such as:
Among Fig. 2, the gyroscope radome has only one deck, and last thermofin 11 is gone up on the cover 10 attached to gyroscope shielding, and following thermofin 13 is attached to the gyroscope shielding down on the cover 12, processes such as that adhering mode can adopt is bonding, spraying.Thermofin among Fig. 2 also may be positioned at the inboard of radome attached to the outside of radome in the reality.
Among Fig. 3, last radome is directly installed on the pedestal 9, and the installation foot place of radome needs independent additional insulation pad 14 on this moment, otherwise heat will enter the gyroscope radome by the pedestal conduction, make radome become infrared source.
Among Fig. 4, be not attached on the gyroscope radome 16 by heat insulation upward cover 15 and heat insulation 18 heat shields that constitute jointly of cover down, but formed a cavity separately, will comprise the fibre optic gyroscope 17 whole inside that are enclosed in of radome.
The material that last insulating sandwich 5 and following insulating sandwich 6 are adopted can be identical, also can be different, no matter adopt which kind of heat-barrier material, and its temperature conductivity generally is not more than 2W/mK, such as commercially available TR36-M50 vegetable cork, otherwise will not have effect of heat insulation preferably.The thickness of thermofin is big more, and its effect of heat insulation is good more, but fibre optic gyroscope generally all has the volume restrictions of comparison strictness, do not allow to use blocked up heat-barrier material, however, insulating sandwich 5 and 6 thickness generally should be less than 1mm, such as 2mm, otherwise will not have tangible heat-blocking action.The gyroscope radome is meant by cover 4 the last radomes that constitute in cover 3 and the gyroscope inner screening in the gyroscope external shield, and down the 8 following radomes that constitute are covered in cover 7 and gyroscope inner screening down by the gyroscope external shield.The gyroscope radome plays the effect of magnetic shielding or electromagnetic screen usually, and its material can be selected metal materials such as magnetically soft alloy, aluminium for use, also can select other material with corresponding function for use.
External temperature environment comprises three kinds of modes such as radiation, conduction, convection current to the approach that influences of fibre optic gyroscope.Heat-proof device among the application, constituted the cavity of a relative closure by last heat shield and cooperating of following heat shield, heat radiation to external world can be played shielding action preferably, especially very effective for the temperature jump of isolation environment, it is level and smooth more, mild that the gyroscope temperature inside is changed.Need for installing, always exist direct the contact between fiber optic loop and the pedestal, therefore heat is delivered to inside by pedestal, and then influence its performance, pedestal then becomes heat conducting predominating path, following heat shield among the application is kept apart gyroscope and pedestal, has cut off this conducting path, and conduction heat effect is obvious for reducing.After having completely cut off conducting path, eliminated the high temperature or the low temperature peak of fibre optic gyroscope inside, the distribution in temperature field is balanced more, thereby has reduced inner forced convertion, reduced convection coefficient, can play good effect for the uniform distribution of temperature field that strengthens on the fiber optic loop.Generally speaking, a kind of heat-proof device that is used for fibre optic gyroscope of the application, the radiation and the conducting path that influence fibre optic gyroscope internal temperature field have all been taked insulating measure, and reduced the convection coefficient in the inner space, therefore when extraneous temperature variable Rate is big, this device can effectively reduce the rate of temperature change that acts on fiber optic loop, reduces the temperature drift of fibre optic gyroscope.
Claims (7)
1. a heat-proof device that is used for fibre optic gyroscope comprises heat shield and following heat shield, and following heat shield is installed on the pedestal (9), it is characterized in that: upper and lower heat shield closed butt joint, the inner chamber of a sealing of formation.
2. a kind of heat-proof device that is used for fibre optic gyroscope as claimed in claim 1, it is characterized in that: described upward heat shield upward covers (10) by last thermofin (11) attached to the gyroscope shielding and upward forms, and following heat shield is upward formed attached to covering (12) under the gyroscope shielding by following thermofin (13).
3. a kind of heat-proof device that is used for fibre optic gyroscope as claimed in claim 1 is characterized in that: be provided with heat insulating mattress (14) between last heat shield and pedestal (9).
4. a kind of heat-proof device that is used for fibre optic gyroscope as claimed in claim 1, it is characterized in that: go up heat shield and comprise the heat insulation cover (15) of going up that separates with shell, following heat shield comprises the heat insulation cover (18) down that separates with shell, heat insulation upward cover (15) and heat insulation cover (18) down closely are connected to form cavity, and this cavity is used to lay optical fibre gyro.
5. a kind of heat-proof device that is used for fibre optic gyroscope as claimed in claim 1, it is characterized in that: go up heat shield and comprise cover (3) in the gyroscope external shield of arranging successively, go up cover (4) in insulating sandwich (5) and the gyroscope inner screening, the three closely is connected to form " interlayer " structure; Following heat shield comprises cover (7) under the gyroscope external shield of arranging successively, following insulating sandwich (6) and gyroscope inner screening cover (8) down, and its building method and last heat shield are similar.
6. a kind of heat-proof device that is used for fibre optic gyroscope as claimed in claim 5 is characterized in that: the temperature conductivity of the material of described upward insulating sandwich (5) and following insulating sandwich (6) is smaller or equal to 2W/mK.
7. a kind of heat-proof device that is used for fibre optic gyroscope as claimed in claim 6 is characterized in that: the described thickness of insulating sandwich (5) and following insulating sandwich (6) of going up is more than or equal to 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202492807U CN201772882U (en) | 2010-07-06 | 2010-07-06 | Thermal insulation device used in fiber optic gyroscope |
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| CN2010202492807U CN201772882U (en) | 2010-07-06 | 2010-07-06 | Thermal insulation device used in fiber optic gyroscope |
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| CN201772882U true CN201772882U (en) | 2011-03-23 |
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| CN2010202492807U Expired - Lifetime CN201772882U (en) | 2010-07-06 | 2010-07-06 | Thermal insulation device used in fiber optic gyroscope |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589541A (en) * | 2012-02-06 | 2012-07-18 | 苏州光环科技有限公司 | Optical fiber ring capable of eliminating influence of external environmental factors |
| CN102679972A (en) * | 2012-06-01 | 2012-09-19 | 北京航空航天大学 | Compound housing for fiber optic gyroscope |
| CN102967302A (en) * | 2012-11-16 | 2013-03-13 | 中国船舶重工集团公司第七一七研究所 | Framework for optical fiber gyroscope and manufacturing method thereof as well as method for packaging optical fiber ring |
| CN103279147A (en) * | 2013-05-15 | 2013-09-04 | 浙江大学 | Temperature control system for controlling optical fiber temperature excursion and application method of temperature control system |
| CN103344232A (en) * | 2013-06-29 | 2013-10-09 | 北京航空航天大学 | Multi-shaft split type optical fiber gyroscope |
| CN104157310A (en) * | 2014-07-15 | 2014-11-19 | 中国船舶重工集团公司第七0七研究所 | Thermal disturbance restraint device applied to liquid floated inertial instrument |
| CN107782301A (en) * | 2017-10-20 | 2018-03-09 | 上海新跃联汇电子科技有限公司 | A kind of fiber optic sensing coil component and the fibre optic gyroscope with the component |
| CN108291839A (en) * | 2015-11-30 | 2018-07-17 | 柯尼卡美能达株式会社 | Measurement Optical devices |
| CN109099914A (en) * | 2018-10-16 | 2018-12-28 | 中国船舶重工集团公司第七0七研究所 | A kind of inertia component heat structure using photodetachment formula optical fibre gyro |
| CN110553636A (en) * | 2019-08-14 | 2019-12-10 | 北京控制工程研究所 | Modular unipolar fiber optic gyro |
| CN110986908A (en) * | 2019-12-16 | 2020-04-10 | 武汉大学 | Elliptical resonant mode piezoelectric MEMS (micro-electromechanical systems) ring gyroscope |
| CN111780740A (en) * | 2020-06-23 | 2020-10-16 | 西安航天精密机电研究所 | Temperature screening system and method for optical fiber ring module |
-
2010
- 2010-07-06 CN CN2010202492807U patent/CN201772882U/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589541A (en) * | 2012-02-06 | 2012-07-18 | 苏州光环科技有限公司 | Optical fiber ring capable of eliminating influence of external environmental factors |
| CN102589541B (en) * | 2012-02-06 | 2016-06-08 | 苏州光环科技有限公司 | A kind of fiber optic loop eliminating outside environmental elements impact |
| CN102679972A (en) * | 2012-06-01 | 2012-09-19 | 北京航空航天大学 | Compound housing for fiber optic gyroscope |
| CN102679972B (en) * | 2012-06-01 | 2015-04-08 | 北京航空航天大学 | Compound housing for fiber optic gyroscope |
| CN102967302A (en) * | 2012-11-16 | 2013-03-13 | 中国船舶重工集团公司第七一七研究所 | Framework for optical fiber gyroscope and manufacturing method thereof as well as method for packaging optical fiber ring |
| CN102967302B (en) * | 2012-11-16 | 2015-04-29 | 中国船舶重工集团公司第七一七研究所 | Framework for optical fiber gyroscope and manufacturing method thereof as well as method for packaging optical fiber ring |
| CN103279147B (en) * | 2013-05-15 | 2015-05-06 | 浙江大学 | Temperature control system for controlling optical fiber temperature excursion and application method of temperature control system |
| CN103279147A (en) * | 2013-05-15 | 2013-09-04 | 浙江大学 | Temperature control system for controlling optical fiber temperature excursion and application method of temperature control system |
| CN103344232A (en) * | 2013-06-29 | 2013-10-09 | 北京航空航天大学 | Multi-shaft split type optical fiber gyroscope |
| CN104157310A (en) * | 2014-07-15 | 2014-11-19 | 中国船舶重工集团公司第七0七研究所 | Thermal disturbance restraint device applied to liquid floated inertial instrument |
| CN108291839A (en) * | 2015-11-30 | 2018-07-17 | 柯尼卡美能达株式会社 | Measurement Optical devices |
| CN107782301A (en) * | 2017-10-20 | 2018-03-09 | 上海新跃联汇电子科技有限公司 | A kind of fiber optic sensing coil component and the fibre optic gyroscope with the component |
| CN109099914A (en) * | 2018-10-16 | 2018-12-28 | 中国船舶重工集团公司第七0七研究所 | A kind of inertia component heat structure using photodetachment formula optical fibre gyro |
| CN109099914B (en) * | 2018-10-16 | 2021-11-09 | 中国船舶重工集团公司第七0七研究所 | Thermal structure of inertia assembly adopting photoelectric separation type optical fiber gyroscope |
| CN110553636A (en) * | 2019-08-14 | 2019-12-10 | 北京控制工程研究所 | Modular unipolar fiber optic gyro |
| CN110986908A (en) * | 2019-12-16 | 2020-04-10 | 武汉大学 | Elliptical resonant mode piezoelectric MEMS (micro-electromechanical systems) ring gyroscope |
| CN110986908B (en) * | 2019-12-16 | 2021-07-20 | 武汉大学 | Elliptical resonant mode piezoelectric MEMS (micro-electromechanical systems) ring gyroscope |
| CN111780740A (en) * | 2020-06-23 | 2020-10-16 | 西安航天精密机电研究所 | Temperature screening system and method for optical fiber ring module |
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Granted publication date: 20110323 |
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