CN102620728A - Double-layer magnetic shielding and bearing ring device suitable for high-precision fiber-optic gyroscope - Google Patents
Double-layer magnetic shielding and bearing ring device suitable for high-precision fiber-optic gyroscope Download PDFInfo
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- CN102620728A CN102620728A CN2012100779187A CN201210077918A CN102620728A CN 102620728 A CN102620728 A CN 102620728A CN 2012100779187 A CN2012100779187 A CN 2012100779187A CN 201210077918 A CN201210077918 A CN 201210077918A CN 102620728 A CN102620728 A CN 102620728A
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Abstract
The invention discloses a double-layer magnetic shielding and bearing ring device suitable for a high-precision fiber-optic gyroscope, belonging to the technical field of inertance. The double-layer magnetic shielding and bearing ring device has a structure for performing magnetic shielding and bearing on a main sensitive device such as a fiber-optic ring of a fiber-optic gyroscope by means of double-layer magnetic shielding structure and a bearing framework. The double-layer magnetic shielding and bearing ring device comprises an inner-layer magnetic shielding encapsulation structure and an outer-layer magnetic shielding outer cover, wherein the outer magnetic shielding outer cover is fixedly arranged on the outer side of the inner-layer magnetic shielding encapsulation structure, and the inner-layer magnetic shielding encapsulation structure is encapsulated, so that double-layer magnetic shielding is formed. The inner-layer magnetic shielding encapsulation structure and the outer-layer magnetic shielding outer cover are fixedly arranged on a support body of a non-magnetic shielding material in different manners respectively, the inner-layer magnetic shielding encapsulation structure is completely insulated from the outer-layer magnetic shielding outer cover, and a magnetic medium is not used for conducting. The double-layer magnetic shielding and bearing ring device has the advantages of effectively improving application of the fiber-optic gyroscope in various kinds of magnetic field environment; improving a magnetic shielding effect; and improving the precision of the gyroscope at the same time.
Description
Technical field
The present invention relates to a kind of double-deck magnetic protection carrier ring device that is applicable to high-precision optical fiber gyro; Specifically; Be a kind of through adopting double-deck magnet shielding structure and support framework, the structure to the main Sensitive Apparatus fiber optic loop of optical fibre gyro is carried out the magnetic protection and carried belongs to the inertial technology field.
Background technology
The ultimate principle of optical fibre gyro is based on the Sagnac effect and produces a nonreciprocal phase difference φ
R, in theory, magnetic field environment should not exert an influence to the operate as normal of optical fibre gyro, but is under the desirable situation of fiber optic loop, does not just set up when promptly the polarization state of light in fiber optic loop do not change.In the practical application, because fiber optic loop undesirable, helix angle is excessive etc. in, the coiling not high enough like the fiber optic loop uniformity coefficient, under the situation that the output of optical fibre gyro exists in magnetic field obvious variation can take place.As under the action of a magnetic field, the polarized light of in optical fiber, propagating can produce a nonreciprocal circular birefringence owing to the Faraday magneto-optic effect, the actings in conjunction such as circular birefringence of reversing generation of this circular birefringence and optical fiber, and it is poor to produce the Faraday non-reciprocal phase.The phase place that error phase that the Faraday effect produces and Sagnac effect produce can't be distinguished, and causes the error of zero of optical fibre gyro.In actual application environment, inevitably there is magnetic interference, comprising natural magnetic interference source and artificial magnetic interference source.The terrestrial magnetic field belongs to the natural disturbance source, and the magnetic field of terrestrial space is low frequency magnetic field as the magnetic field of a uniform magnetization spheroid; Artificial magnetic interference source is to be disturbed by the magnetic energy that dynamo-electric or other people frock are buied property living, and these magnetic fields all can produce a non-reciprocal phase difference Δ φ who is caused by the magneto-optic Faraday effect in the optical fibre gyro course of work
mEven the employing polarization maintaining optical fibre changes because residual birefringence causes along the polarization state of optical fiber, the coefficient relevant with polarization state of each little section correspondence no longer is a constant, therefore, total the phase differential between two beam reversal's wave travels can not be entirely zero, promptly has Δ φ
mΔ φ
mThe existence meeting to optical fibre gyro; Especially the output of high-precision optical fiber gyro impacts; Particularly when the sensitive axes sensing of optical fibre gyro remained unchanged, the output measurement result of gyro produced bigger deviation with the rotation of position, i.e. " six positions " error phenomenon or the like.Therefore, must partly take suitable magnetic safeguard procedures in order to reduce the non-reciprocal phase difference that the Faraday effect produces under the action of a magnetic field to its fiber optic loop to the influence of gyro output accuracy.
The existing fiber optic loop encapsulating structure that is used for high-precision optical fiber gyro; Adopt the structure of individual layer magnetic protection; The middle high-precision optical fiber that is mainly used in impermeability requirement and magnetic shielding requirement is used to organize under the environment; If be used under the high-precision environment, then need individual layer magnet shielding structure body thickness be brought up to more than the 2mm.Through calculating and simulation analysis, under the situation in the complicated magnetic field of reply, the individual layer magnet shielding structure can't satisfy request for utilization.
Summary of the invention
The purpose of this invention is to provide a kind of double-deck magnetic protection carrier ring device that is applicable to high-precision optical fiber gyro,, the main Sensitive Apparatus fiber optic loop of optical fibre gyro is carried out magnetic protection and carrying through adopting double-deck magnet shielding structure and support framework.
A kind of double-deck magnetic protection carrier ring device that is used for high-precision optical fiber gyro comprises internal layer magnetic shielding encapsulating structure and outer magnetic shielding outer cover.
Wherein, The magnetic shielding encapsulating structure of internal layer comprises supporter, magnetic shielding interior cover, magnetic shielding capping, fiber optic loop, Y waveguide and draws fine terminal; Supporter adopts non-shielding material; For by ring-type chassis A, sleeve A, Y waveguide the integrative-structure that crossbeam, contiguous block A and contiguous block B constitute being installed, ring-type chassis A inner periphery circumferentially links to each other with sleeve A bottom, and ring-type chassis A outer circumferential edges is downward flanging; Y waveguide is installed crossbeam and is arranged on the sleeve A madial wall, and Y waveguide is installed crossbeam lower surface middle part indent, forms the Y waveguide mounting groove, and Y waveguide is fixed in the Y waveguide mounting groove; Sleeve A madial wall top circumferentially is evenly equipped with at least 2 contiguous block A, has capping fixing threaded hole and loam cake fixing threaded hole and slotted panel oncomelania hole on each contiguous block A; One end of slotted panel nail passes slotted panel oncomelania hole by contiguous block B below and contiguous block B fixes; Circumferentially be evenly equipped with at least 2 contiguous block B in sleeve A madial wall bottom, have the base fixing threaded hole on the contiguous block B; The bottom surface of contiguous block B is lower than the lower surface of circular disk A, and the bottom surface of contiguous block B equals the width of the flanging of circular disk A to the distance of circular disk A bottom surface.
The integrative-structure of cover for constituting in the magnetic shielding by ring-type chassis B, sleeve B; Wherein, B inner periphery in ring-type chassis circumferentially links to each other with sleeve B bottom; Interfix between sleeve B and sleeve A, sleeve B is socketed in the sleeve A outside, and ring-type chassis B lower surface and ring-type chassis A upper surface are fitted; Fiber optic loop is enclosed within on the sleeve B, and the adhesive surface of fiber optic loop is bonded on the annular disc B; Cover adopts band gum foil, 1J50 or 1J79 in the said magnetic shielding, through aviation with bonding between glue and supporter; Above-mentioned ring-type chassis B and the corresponding breach that has in ring-type chassis A outer circumferential edges place.
The said magnetic shielding capping annular of serving as reasons is taken over a business the integrative-structure that constitutes with ring-type outer wall and lug, and the excircle that annular is taken over a business circumferentially links to each other with ring-type outer wall top, and annular takes over a business that circumferential uniform Design has lug on the inner periphery; Concrete connected mode between magnetic shielding capping and supporter is: in the magnetic shielding capping ring-type outer wall bottom face, annular take over a business respectively with magnetic shielding in after annular chassis B upper surface, sleeve B top end face are fitted in the cover; Make that each contiguous block A cooperates in each lug and the supporter, lug and contiguous block A are fixedly tightened through bolt.
Upwards have four camber line shape projections in the supporter annular chassis A lower surface week, and the arc core of four camber line shape projections and annular chassis A center concurrent, through four camber line shape projections annular chassis A is divided into inside and outside two circles; Y waveguide is installed to be installed with on the crossbeam and is drawn fine terminal, draws fine terminal and is positioned at the relative end of single channel tail optical fiber external part that Y waveguide is installed the Y waveguide on the crossbeam;
Outer field magnetic shielding outer cover comprises loam cake and base, adopts 1J50 or 1J79 material; Wherein, base is the tubular structure of bottom sealing, is used for holding internal layer magnetic shielding encapsulating structure; Base fixing threaded hole in base through screws and the supporter on the contiguous block B cooperates to be tightened, and realizes fixing between base and internal layer magnetic shielding encapsulating structure thus; Also have on the base and draw fine terminal embedded hole, draw fine terminal and be embedded in the lead terminal optical fiber hole, make the single channel tail optical fiber of Y waveguide be positioned at base exterior after fine terminal passes by drawing; Draw fine terminal and adopt 1J50 or 1J79; Simultaneously, after base is fixing, need in the supporter to guarantee flanging lower surface, contiguous block B bottom surface, each camber line capable projection bottom surface of circular disk and draw fine terminal bottom surface and all fit with the base inner bottom surface.
Said loam cake is the tubular structure of top seal, and the top of loam cake has the circular platform type concave configuration, and the internal diameter of loam cake is identical with the internal diameter of base, and loam cake is installed crossbeam through loam cake fixing threaded hole on the contiguous block A in bolt and the supporter 1 and Y waveguide and tightened fixing; After loam cake was fixing, the lower surface of loam cake engaged with the upper surface of base; Internal layer magnetic shielding encapsulating structure and outer magnetic shielding cover on outward and do not contact on comprehensive; Have slotted panel nail on the upper cover top surface and pass the hole, the end that the slotted panel nail passes contiguous block B passes the hole by the slotted panel nail and passes upper cover top surface; Also have the plug connector cable hole on the upper cover top surface, the signal output part in the Y waveguide can pass the plug connector cable hole through electric wire and link to each other with outside plug connector.
The invention has the advantages that:
1, the present invention is used for the double-deck magnetic protection carrier ring device of high-precision optical fiber gyro, and two-layer magnetic shielding inside and outside the employing can compound two kinds of materials, and is good than individual layer stack pile homogenous material shield effectiveness, improves the application of optical fibre gyro at various magnetic field environments;
2, the present invention is used for the double-deck magnetic protection carrier ring device of high-precision optical fiber gyro, and double-deck magnet shielding structure is insulated from each other, does not have flux path, improves Magnetic Shielding Effectiveness;
3, the present invention is used for the double-deck magnetic protection carrier ring device of high-precision optical fiber gyro, and the joint of internal layer magnetic shielding content and the joint of outer magnetic shielding outer cover are wrong mutually, guarantee that gyro has six higher positional precisions;
4, the present invention is used for the double-deck magnetic protection carrier ring device of high-precision optical fiber gyro, can realize that Y waveguide two-way tail optical fiber and single channel tail optical fiber subregion coil, and does not cause cross-laminatedly, helps improving Gyro Precision;
5, the present invention is used for the double-deck magnetic protection carrier ring device of high-precision optical fiber gyro, considers in the design the fiber optic loop in the optical fibre gyro and Y waveguide as a modular unitization.
Description of drawings
Fig. 1 is the double-deck magnetic protection of the present invention carrier ring device one-piece construction figure explosive view;
Fig. 2 is the magnetic shielding encapsulating structure explosive view of internal layer in the double-deck magnetic protection of the present invention carrier ring device;
Fig. 3 is supporting body structure vertical view in the double-deck magnetic protection of the present invention carrier ring device;
Fig. 4 is supporting body structure upward view in the double-deck magnetic protection of the present invention carrier ring device;
Fig. 5 is one-piece construction upward view in the double-deck magnetic protection of the present invention carrier ring device;
Fig. 6 is the double-deck magnetic protection of the present invention carrier ring device one-piece construction stereographic map.
Among the figure:
Cover in the 1-magnetic shielding encapsulating structure 2-magnetic shielding outer cover 101-supporter 102-magnetic shielding
103-magnetic shielding capping 104-fiber optic loop 105-Y waveguide 106-lead terminal
Crossbeam 101d-contiguous block A is installed in the A 101b-sleeve A 101cY waveguide of 101a-ring-type chassis
101e-contiguous block B 101f-flanging 101g-Y waveguide mounting groove 101h-tapped through hole
101i-capping fixing threaded hole 101j-loam cake fixing threaded hole 101k-slotted panel oncomelania hole 101l-slotted panel nail
101m-base fixing threaded hole 101n-breach 101p-camber line shape projection
101q-draws fine terminal mounting hole 102a-ring-type chassis B 102b-sleeve B
The 103a-annular is taken over a business 103b-ring-type outer wall 103c-lug 201-loam cake
201a-slotted panel nail passes hole 201b-plug connector cable hole
202-base 202a-draws fine terminal embedded hole 203-circular platform type concave configuration
Embodiment
Come the present invention is further specified below in conjunction with accompanying drawing.
The present invention is used for the double-deck magnetic protection carrier ring device of high-precision optical fiber gyro; Comprise that internal layer is used for the magnetic shielding encapsulating structure 1 of packaged fiber ring and constitutes with outer field magnetic shielding outer cover 2, as shown in Figure 1, be fixedly mounted on internal layer magnetic shielding encapsulating structure 1 outside through outer magnetic shielding outer cover 2; With 1 encapsulation of internal layer magnetic shielding encapsulating structure; Form double-deck magnetic protection thus, and isolate fully between the two-layer magnetic protective device, do not have the magnetic medium conducting.
Wherein, The magnetic shielding encapsulating structure 1 of internal layer comprises in the supporter 101, magnetic shielding cover 102, magnetic shielding capping 103, fiber optic loop 104, Y waveguide 105 and draws fine terminal 106; Like Fig. 2, Fig. 3, shown in Figure 4; Supporter 101 adopts aluminum alloy materials (non-magnetic shielding material), and for by ring-type chassis A101a, sleeve A101b, Y waveguide the integrative-structure that crossbeam 101c, contiguous block A101d and contiguous block B101e constitute being installed, ring-type chassis A101a inner periphery circumferentially links to each other with sleeve A101b bottom; Ring-type chassis A101a outer circumferential edges is downward flanging 101f, and ring-type chassis A101a, sleeve A101b are used for respectively supporting and the interior cover 102 of location magnetic shielding; Y waveguide is installed crossbeam 101c and is arranged on the sleeve A101b madial wall; Y waveguide is installed crossbeam 101c lower surface middle part indent; Form Y waveguide mounting groove 101g; Have tapped through hole 101h on the Y waveguide mounting groove 101g and be used for fixing Y waveguide 105, also be used for fixing the loam cake 201 of outer magnetic shielding outer cover 2 simultaneously; Cooperate with tapped through hole 101h through screw, Y waveguide 105 is fixed in the Y waveguide mounting groove 101g, as shown in Figure 4, through Y waveguide crossbeam 101c is installed and also can strengthens the whole double-deck magnetic protective device of reinforcing the present invention; Sleeve A madial wall top circumferentially is evenly equipped with at least 2 contiguous block A101d; Have capping fixing threaded hole 101i and loam cake fixing threaded hole 101j and slotted panel oncomelania hole 101k on each contiguous block A101d, be used for fixing the loam cake 201 of magnetic shielding capping 103, outer magnetic shielding outer cover 2 respectively and slotted panel nail 101l is installed.Wherein, the end of slotted panel nail 101l passes slotted panel oncomelania hole 101k by contiguous block B101e below, and B101e fixes with contiguous block.Circumferentially be evenly equipped with at least 2 contiguous block B101e in sleeve A101b madial wall bottom, have base fixing threaded hole 101m on the contiguous block B101e, be used for fixing the base 202 of outer magnetic shielding outer cover 2; The bottom surface of contiguous block B is lower than the lower surface of circular disk A101a, and the bottom surface of contiguous block B101e equals the width of the flanging 101f (being above-mentioned ring-type chassis A101a outer circumferential edges) of circular disk A101a to the distance of circular disk A101a bottom surface.The central point that above-mentioned Y waveguide is installed crossbeam 101c overlaps with sleeve A101b circumferential cross-section central point.
The integrative-structure of cover 102 for being made up of ring-type chassis B102a, sleeve B102b in the magnetic shielding is used for positioning optical waveguides ring 104.Wherein, B102a inner periphery in ring-type chassis circumferentially links to each other with sleeve B102b bottom; The internal diameter of sleeve B102b equals the external diameter of sleeve A101b; Sleeve B102b is socketed in the sleeve A101b outside; Ring-type chassis B102a lower surface and ring-type chassis A101a upper surface are fitted; And the width of ring-type chassis B102a equals the width of ring-type chassis A101a, fixes through gluing between cover and the supporter in the magnetic shielding.The fiber optic loop 104 of taking off skeleton is enclosed within on the sleeve B102b, and the adhesive surface of fiber optic loop 104 (fiber optic loop 104 bottom surfaces) is bonded on the annular disc B102a.Realize the ground floor magnetic shielding of fiber optic loop 104 madial walls and bottom surface through cover in the magnetic shielding 102 thus.Cover 102 thick 0.5mm in the above-mentioned magnetic shielding can directly adopt band gum foil, thereby realize and 101 of supporters bonding.Cover 102 also can add iron-nickel alloy material 1J50 or 1J79 by the employing machine in the magnetic shielding, and is bonding with glue and 101 of supporters through aviation.
Above-mentioned ring-type chassis B102a and the corresponding breach 101n that has in ring-type chassis A101a outer circumferential edges place, as shown in Figure 1, as the cabling mouth of fiber optic loop 4.
Said magnetic shielding capping 103 annular of serving as reasons is taken over a business the integrative-structure that 103a and ring-type outer wall 103b and lug 103c constitute; As shown in Figure 2; Thickness is 0.5～1mm; The excircle that annular is taken over a business 103a circumferentially links to each other with ring-type outer wall 103b top, and annular takes over a business on the 103a inner periphery circumferentially that uniform Design has lug 103c.The concrete connected mode that magnetic shielding capping 103 and supporter are 101 is: in the magnetic shielding capping 103 ring-type outer wall 103b bottom face, annular take over a business 103a respectively with magnetic shielding in after annular chassis B102a upper surface, sleeve B102b top end face are fitted in the cover 102; Make that each contiguous block A101d cooperates in each lug 103c and the supporter 101; Through bolt lug 103c and contiguous block A101d are fixedly tightened, realize the relative fixed of 103 of supporter 101 and magnetic shielding cappings thus.Be connected through magnetic shielding capping 103 and supporter 101, form and be used for the fiber optic loop placed cavity of packaged fiber ring, reach the purpose of packaged fiber ring 104.In order to make supporter 101 can not produce relativity shift fixedly the time with magnetic shielding capping 103; Therefore; As shown in Figure 3, the ring-type chassis A101a outer circumferential edges in the supporter 101 is designed to step edge, be used for locating the bottom surface circumference of annular outer wall 103b in the magnetic shielding capping 103.
In supporter 101; Upwards have four camber line shape projection 101p annular chassis A101a lower surface week; And the arc core of four camber line shape projection 101p and annular chassis A101a center concurrent; Through four camber line shape projection 101p annular chassis A is divided into inside and outside two circles thus, camber line shape projection 101p and annular chassis A go up to such an extent that be the outer ring between the flanging, as the district of detouring of the two-way tail optical fiber of fiber optic loop and Y waveguide 105; Be inner ring between the contiguous block B101e in camber line shape projection 101p and the supporter 101, as the single channel tail optical fiber of Y waveguide 105 district of detouring.Y waveguide is installed to have on the crossbeam 101c and is drawn fine terminal mounting hole 101q; Draw fine terminal mounting hole 101q and be positioned at the relative end of single channel tail optical fiber external part that Y waveguide is installed the Y waveguide 105 on the crossbeam 101c; Drawing fine terminal mounting hole 101q is used for fixing by what magnetic shielding material was processed and draws fine terminal 106; Can be with drawing A101a bottom surface, fine terminal 106 stationary annular chassis through screw, the single channel tail optical fiber of Y waveguide 105 can pass after the inner ring coiling and draw fine terminal 106 and pass.Can realize two-way tail optical fiber and the single channel tail optical fiber subregion coiling of Y waveguide 105 through said structure, not cause cross-laminatedly, help improving Gyro Precision.
Outer field magnetic shielding outer cover 2 comprises loam cake 201 and base 202, and loam cake 201 and all thick 1mm of base 202 all adopt 1J50 or 1J79 material machine to add; As shown in Figure 1, wherein, base 202 is used for holding internal layer magnetic shielding encapsulating structure 1 for the tubular structure of bottom sealing; Base 202 cooperates through the base fixing threaded hole 101m on the contiguous block B101e in screw and the supporter 1 to be tightened, and realizes the fixing of 1 of base 202 and internal layer magnetic shielding encapsulating structure thus.Also have on the base 202 and draw fine terminal embedded hole 202a, draw fine terminal 106 and be embedded among the lead terminal optical fiber hole 202a, make the single channel tail optical fiber that can make Y waveguide 105 thus be positioned at base 202 outsides after fine terminal passes by drawing; The high-permeability material that draws fine terminal 106 same 1J50 of employing or 1J79 among the present invention; Thus draw fine terminal 106 embed on the bases 202 draw fine terminal embedded hole 202a after; Make and draw fine terminal 106 and form holistic magnetic cup lee-side with base 202 lower surfaces, as shown in Figure 5; Simultaneously; After base 202 is fixed; All fitting with base 202 inner bottom surfaces in the flanging 101f lower surface, contiguous block B101e bottom surface, the capable projection 101p of each camber line bottom surface that need to guarantee ring-type chassis A101a in the supporter 101, makes outer field magnetic shielding outer cover 2 and 1 of internal layer magnetic shielding encapsulating structure can form continuous magnetic loop thus.
Said loam cake 201 is the tubular structure of top seal; The top of loam cake 201 has circular platform type concave configuration 203; The internal diameter of loam cake 201 is identical with the internal diameter of base 202; Loam cake 201 cooperates through loam cake fixing threaded hole 101j on the contiguous block A101d in bolt and the supporter 1 and the tapped through hole 101h on the Y waveguide mounting groove 101g to be tightened, and realizes the fixing of 1 of loam cake 201 and internal layer magnetic shielding encapsulating structure thus.After loam cake 201 was fixed, the lower surface of loam cake 201 engaged with the upper surface of base 202, realized the second layer magnetic shielding of internal layer magnetic shielding encapsulating structures 1 thus through loam cake 201 and base 202.Have the slotted panel nail on loam cake 201 end faces and pass hole 201a; The end that slotted panel nail 101l passes contiguous block B101e can pass hole 201a by the slotted panel nail and pass loam cake 201 end faces, realizes that through slotted panel nail 101l the double-deck magnetic protection of the present invention carrier ring device integral body links to each other with external agency.Also have plug connector cable hole 201b on loam cake 201 end faces; Signal output part in the Y waveguide 105 can pass the plug connector cable hole through electric wire and link to each other with outside plug connector; Realize the signal output of Y waveguide 105 through plug connector; As shown in Figure 6; Simultaneously after outer magnetic shielding outer cover 2 and internal layer magnetic shielding encapsulating structure 1 are fixing, the protection effect of the double-deck magnetic shielding of the present invention can be improved thus in the plane that needs to guarantee supporter 101 and magnetic shielding capping 103 joints in plane and the internal layer magnetic shielding encapsulating structure 1 of loam cake 20 1 and the joint of base in the outer magnetic shielding outer cover 2 not on same surface level; And to guarantee that internal layer magnetic shielding encapsulating structure 1 does not contact on comprehensive with outer magnetic shielding outer cover 2, promptly do not contact between annular disc 101a basal spacing in base 202 inner bottom surfaces and the supporter 1, base 202 medial surfaces and magnetic shielding capping 103 lateral surface spacings, loam cake 201 inner top surfaces and magnetic shielding capping 103 upper surface spacings and loam cake 201 medial surfaces and magnetic shielding capping 103 lateral surfaces.
Be formed for the double-deck magnetic protection carrier ring device of high-precision optical fiber gyro through said structure; In said structure; Capping fixing threaded hole 101i and loam cake fixing threaded hole 101j and base fixing threaded hole 101m are blind hole; And capping fixing threaded hole 101i, loam cake fixing threaded hole 101j, base fixing threaded hole 101m and slotted panel screw 101k are positioned on the same circumference, are convenient to process and assemble.Annular is taken over a business between 103a and ring-type outer wall 103b, is all adopted rounding off to be connected between between the sidewall of loam cake 201 and end face and base 202 sidewalls and bottom surface in the magnetic shielding capping 103; Fillet r >=3mm can improve the magnetic shield performance that whole double-deck magnetic protects the carrier ring device thus.
Through calculating and simulation analysis; The shield effectiveness of double-deck magnetic protective device of the present invention obviously is superior to the shield effectiveness of stack pile individual layer magnetic protective device; In the design process of double-deck magnetic protective device, can also reasonably design according to the distribution of material of different magnetic field application environment to the magnetic protective layer.As, needing under the situation of the outside high-intensity magnetic field of shielding, outer field magnetic shielding outer cover 2 can be selected for use and be difficult for saturated material, like silicon steel; Internal layer magnetic shielding encapsulating structure 1 can be selected the high permeability material that reaches capacity easily for use, like permalloy etc.
Claims (10)
1. a double-deck magnetic protection carrier ring device that is used for high-precision optical fiber gyro is characterized in that: comprise internal layer magnetic shielding encapsulating structure and outer magnetic shielding outer cover;
Wherein, The magnetic shielding encapsulating structure of internal layer comprises supporter, magnetic shielding interior cover, magnetic shielding capping, fiber optic loop, Y waveguide and draws fine terminal; Supporter adopts non-shielding material; For by ring-type chassis A, sleeve A, Y waveguide the integrative-structure that crossbeam, contiguous block A and contiguous block B constitute being installed, ring-type chassis A inner periphery circumferentially links to each other with sleeve A bottom, and ring-type chassis A outer circumferential edges is downward flanging; Y waveguide is installed crossbeam and is arranged on the sleeve A madial wall, and Y waveguide is installed crossbeam lower surface middle part indent, forms the Y waveguide mounting groove, and Y waveguide is fixed in the Y waveguide mounting groove; Sleeve A madial wall top circumferentially is evenly equipped with at least 2 contiguous block A, has capping fixing threaded hole and loam cake fixing threaded hole and slotted panel oncomelania hole on each contiguous block A; One end of slotted panel nail passes slotted panel oncomelania hole by contiguous block B below and contiguous block B fixes; Circumferentially be evenly equipped with at least 2 contiguous block B in sleeve A madial wall bottom, have the base fixing threaded hole on the contiguous block B; The bottom surface of contiguous block B is lower than the lower surface of circular disk A, and the bottom surface of contiguous block B equals the width of the flanging of circular disk A to the distance of circular disk A bottom surface;
The integrative-structure of cover for constituting in the magnetic shielding by ring-type chassis B, sleeve B; Wherein, B inner periphery in ring-type chassis circumferentially links to each other with sleeve B bottom; Interfix between sleeve B and sleeve A, sleeve B is socketed in the sleeve A outside, and ring-type chassis B lower surface and ring-type chassis A upper surface are fitted; Fiber optic loop is enclosed within on the sleeve B, and the adhesive surface of fiber optic loop is bonded on the annular disc B; Cover adopts band gum foil, 1J50 or 1J79 in the said magnetic shielding, through aviation with bonding between glue and supporter; Above-mentioned ring-type chassis B and the corresponding breach that has in ring-type chassis A outer circumferential edges place;
The said magnetic shielding capping annular of serving as reasons is taken over a business the integrative-structure that constitutes with ring-type outer wall and lug, and the excircle that annular is taken over a business circumferentially links to each other with ring-type outer wall top, and annular takes over a business that circumferential uniform Design has lug on the inner periphery; Concrete connected mode between magnetic shielding capping and supporter is: in the magnetic shielding capping ring-type outer wall bottom face, annular take over a business respectively with magnetic shielding in after annular chassis B upper surface, sleeve B top end face are fitted in the cover; Make that each contiguous block A cooperates in each lug and the supporter, lug and contiguous block A are fixedly tightened through bolt;
Upwards have four camber line shape projections in the supporter annular chassis A lower surface week, and the arc core of four camber line shape projections and annular chassis A center concurrent, through four camber line shape projections annular chassis A is divided into inside and outside two circles; Y waveguide is installed to be installed with on the crossbeam and is drawn fine terminal, draws fine terminal and is positioned at the relative end of single channel tail optical fiber external part that Y waveguide is installed the Y waveguide on the crossbeam;
Outer field magnetic shielding outer cover comprises loam cake and base, adopts 1J50 or 1J79 material; Wherein, base is the tubular structure of bottom sealing, is used for holding internal layer magnetic shielding encapsulating structure; Base fixing threaded hole in base through screws and the supporter on the contiguous block B cooperates to be tightened, and realizes fixing between base and internal layer magnetic shielding encapsulating structure thus; Also have on the base and draw fine terminal embedded hole, draw fine terminal and be embedded in the lead terminal optical fiber hole, make the single channel tail optical fiber of Y waveguide be positioned at base exterior after fine terminal passes by drawing; Draw fine terminal and adopt 1J50 or 1J79; Simultaneously, after base is fixing, need in the supporter to guarantee flanging lower surface, contiguous block B bottom surface, each camber line capable projection bottom surface of circular disk and draw fine terminal bottom surface and all fit with the base inner bottom surface; Said loam cake is the tubular structure of top seal, and the top of loam cake has the circular platform type concave configuration, and the internal diameter of loam cake is identical with the internal diameter of base, and loam cake is installed crossbeam through loam cake fixing threaded hole on the contiguous block A in bolt and the supporter 1 and Y waveguide and tightened fixing; After loam cake was fixing, the lower surface of loam cake engaged with the upper surface of base; Internal layer magnetic shielding encapsulating structure and outer magnetic shielding cover on outward and do not contact on comprehensive; Have slotted panel nail on the upper cover top surface and pass the hole, the end that the slotted panel nail passes contiguous block B passes the hole by the slotted panel nail and passes upper cover top surface; Also have the plug connector cable hole on the upper cover top surface, the signal output part in the Y waveguide can pass the plug connector cable hole through electric wire and link to each other with outside plug connector.
2. a kind of double-deck magnetic protection carrier ring device that is used for high-precision optical fiber gyro as claimed in claim 1, it is characterized in that: said supporter adopts aluminum alloy materials.
3. a kind of double-deck magnetic protection carrier ring device that is used for high-precision optical fiber gyro as claimed in claim 1, it is characterized in that: said outer field magnetic shielding outer cover is a silicon steel, and internal layer magnetic shielding encapsulating structure is a permalloy.
4. a kind of double-deck magnetic protection carrier ring device that is used for high-precision optical fiber gyro as claimed in claim 1, it is characterized in that: the central point that said Y waveguide is installed crossbeam overlaps with sleeve A circumferential cross-section central point.
5. a kind of double-deck magnetic protection carrier ring device that is used for high-precision optical fiber gyro as claimed in claim 1, it is characterized in that: the width of said ring-type chassis B equals the width of ring-type chassis A.
6. a kind of double-deck magnetic protection carrier ring device that is used for high-precision optical fiber gyro as claimed in claim 1, it is characterized in that: said capping fixing threaded hole and loam cake fixing threaded hole and base fixing threaded hole are blind hole.
7. a kind of double-deck magnetic protection carrier ring device that is used for high-precision optical fiber gyro as claimed in claim 1, it is characterized in that: said capping fixing threaded hole, loam cake fixing threaded hole, base fixing threaded hole and slotted panel screw are positioned on the same circumference.
8. a kind of double-deck magnetic protection carrier ring device that is used for high-precision optical fiber gyro as claimed in claim 1, it is characterized in that: the ring-type chassis A outer circumferential edges in the said supporter is designed to step edge.
9. a kind of double-deck magnetic protection carrier ring device that is used for high-precision optical fiber gyro as claimed in claim 1 is characterized in that: the plane of supporter and magnetic shielding capping joint coplane not in the plane of the joint of loam cake and base and the internal layer magnetic shielding encapsulating structure in the said outer magnetic shielding outer cover.
10. a kind of double-deck magnetic protection carrier ring device that is used for high-precision optical fiber gyro as claimed in claim 1; It is characterized in that: in the said magnetic shielding capping annular take over a business with the ring-type outer wall between, all adopt rounding off to be connected between between the sidewall of loam cake and end face and base side wall and bottom surface, fillet r >=3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN102967300A (en) * | 2012-12-07 | 2013-03-13 | 河北汉光重工有限责任公司 | Framework of double-shielding fiber-optic gyroscope |
| CN102997906A (en) * | 2012-12-25 | 2013-03-27 | 北京航空航天大学 | Magnetic shielding sensitive ring module structure capable of being packaged independently for optical fiber gyro |
| CN103033179A (en) * | 2012-12-25 | 2013-04-10 | 北京航空航天大学 | Fiber-optic gyroscope sensitive ring skeleton with inner flange |
| CN103115621A (en) * | 2013-01-17 | 2013-05-22 | 北京航空航天大学 | Optical fiber gyroscope sensing ring device for petroleum gradiograph |
| CN103674005A (en) * | 2012-09-07 | 2014-03-26 | 中国航空工业第六一八研究所 | Magnetic shielding case of fiber-optic gyroscope |
| CN103697888A (en) * | 2013-12-16 | 2014-04-02 | 北京自动化控制设备研究所 | Magnetic shielding device for biaxial-rotation fibre-optic inertial navigation system |
| CN103994761A (en) * | 2014-05-15 | 2014-08-20 | 北京航空航天大学 | Fiber-optic gyroscope double-layer magnetic shielding sensitive ring assembly with airtight cavity, and assembling method of assembly |
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| CN106908051A (en) * | 2015-12-23 | 2017-06-30 | 北京自动化控制设备研究所 | A kind of high-precision optical fiber gyro bilayer magnetic shielding cover and its heat treatment method |
| CN111947639A (en) * | 2020-07-10 | 2020-11-17 | 中国航空工业集团公司西安飞行自动控制研究所 | High-environment-adaptability optical fiber gyroscope |
| CN113804177A (en) * | 2021-08-20 | 2021-12-17 | 北京航天时代光电科技有限公司 | Ultra-high precision optical fiber gyroscope structure |
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| CN103674005A (en) * | 2012-09-07 | 2014-03-26 | 中国航空工业第六一八研究所 | Magnetic shielding case of fiber-optic gyroscope |
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| CN102997906A (en) * | 2012-12-25 | 2013-03-27 | 北京航空航天大学 | Magnetic shielding sensitive ring module structure capable of being packaged independently for optical fiber gyro |
| CN103033179A (en) * | 2012-12-25 | 2013-04-10 | 北京航空航天大学 | Fiber-optic gyroscope sensitive ring skeleton with inner flange |
| CN102997906B (en) * | 2012-12-25 | 2015-05-06 | 北京航空航天大学 | Magnetic shielding sensitive ring module structure capable of being packaged independently for optical fiber gyro |
| CN103033179B (en) * | 2012-12-25 | 2015-06-17 | 北京航空航天大学 | Fiber-optic gyroscope sensitive ring skeleton with inner flange |
| CN103115621A (en) * | 2013-01-17 | 2013-05-22 | 北京航空航天大学 | Optical fiber gyroscope sensing ring device for petroleum gradiograph |
| CN103115621B (en) * | 2013-01-17 | 2015-08-26 | 北京航空航天大学 | A kind of optical fibre gyro sensing ring device for oil inclinometer |
| CN103697888A (en) * | 2013-12-16 | 2014-04-02 | 北京自动化控制设备研究所 | Magnetic shielding device for biaxial-rotation fibre-optic inertial navigation system |
| CN103994761A (en) * | 2014-05-15 | 2014-08-20 | 北京航空航天大学 | Fiber-optic gyroscope double-layer magnetic shielding sensitive ring assembly with airtight cavity, and assembling method of assembly |
| CN103994761B (en) * | 2014-05-15 | 2016-12-14 | 北京航空航天大学 | A kind of optical fibre gyro double-layer magnetic shielding sensing ring assembly with air-tight cavity and assemble method thereof |
| CN105403213A (en) * | 2015-12-07 | 2016-03-16 | 北京航天时代光电科技有限公司 | Method for controlling temperature of photoelectric separate fiber optic gyroscope optical path |
| CN106908051A (en) * | 2015-12-23 | 2017-06-30 | 北京自动化控制设备研究所 | A kind of high-precision optical fiber gyro bilayer magnetic shielding cover and its heat treatment method |
| CN105806328A (en) * | 2016-03-09 | 2016-07-27 | 浙江大学 | Shielding structure capable of improving properties of optical fiber loop of optical fiber gyroscope |
| CN111947639A (en) * | 2020-07-10 | 2020-11-17 | 中国航空工业集团公司西安飞行自动控制研究所 | High-environment-adaptability optical fiber gyroscope |
| CN113804177A (en) * | 2021-08-20 | 2021-12-17 | 北京航天时代光电科技有限公司 | Ultra-high precision optical fiber gyroscope structure |
| CN113804177B (en) * | 2021-08-20 | 2023-03-10 | 北京航天时代光电科技有限公司 | Ultra-high precision optical fiber gyroscope structure |
| CN116026312A (en) * | 2023-03-31 | 2023-04-28 | 中国船舶集团有限公司第七〇七研究所 | Optical fiber ring with soaking magnetic shielding function |
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