CN102620728B - 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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- CN102620728B CN102620728B CN201210077918.7A CN201210077918A CN102620728B CN 102620728 B CN102620728 B CN 102620728B CN 201210077918 A CN201210077918 A CN 201210077918A CN 102620728 B CN102620728 B CN 102620728B
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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 by adopting double-deck magnet shielding structure and support framework, the structure that the main Sensitive Apparatus fiber optic loop of optical fibre gyro is carried out to magnetic protection and carrying, belongs to inertial technology field.
Background technology
The ultimate principle of optical fibre gyro is to produce a nonreciprocal phase difference φ based on Sagnac effect
r, in theory, magnetic field environment should not exert an influence to the normal work of optical fibre gyro, but is under fiber optic loop ideal situation, when the polarization state of light in fiber optic loop do not change, just sets up.In practical application, undesirable due to fiber optic loop, in as not high enough in fiber optic loop uniformity coefficient, coiling, helix angle is excessive etc., can occur significantly to change the in the situation that the output of optical fibre gyro existing in magnetic field.Under at magnetic fields, the polarized light of propagating in optical fiber is because Faraday magneto-optic effect can produce a nonreciprocal circular birefringence, and the actings in conjunction such as the circular birefringence that the torsion of this circular birefringence and optical fiber produces, produce Faraday non-reciprocal phase poor.The phase place that the error phase that Faraday effect produces and Sagnac effect produce cannot 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.Terrestrial magnetic field belongs to natural disturbance source, and the magnetic field of terrestrial space, as the magnetic field of a uniform magnetization spheroid, is low frequency magnetic field; Artificial magnetic interference source is to be disturbed by dynamo-electric or other people the frock raw magnetic energy of buying property, and these magnetic fields all can produce a poor Δ φ of the non-reciprocal phase being caused by Magnet-Optic Faraday Effect in the optical fibre gyro course of work
m.Even if employing polarization maintaining optical fibre, changes because residual birefringence causes along the polarization state of optical fiber, each micro-section of corresponding coefficient relevant with polarization state is no longer a constant, therefore, total the phase differential between two beam reversal's wave travels can not be entirely zero, has Δ φ
m.Δ φ
mexistence meeting to optical fibre gyro, especially the output of high-precision optical fiber gyro impacts, particularly, in the time that the sensitive axes sensing of optical fibre gyro remains unchanged, the output measurement result of gyro produces larger deviation with the rotation of position, i.e. " six positions " error phenomenon etc.Therefore, in order to reduce, non-reciprocal phase that Faraday effect under magnetic fields produces is poor must take suitable magnetic safeguard procedures to its fiber optic loop part to the impact of gyro output accuracy.
The existing fiber optic loop encapsulating structure 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 environment, if be used under high-precision environment, more than needing that individual layer magnet shielding structure body thickness is brought up to 2mm.By calculating and simulation analysis, under the situation in the complicated magnetic field of reply, individual layer magnet shielding structure cannot meet request for utilization.
Summary of the invention
The object 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, by adopting double-deck magnet shielding structure and support framework, the main Sensitive Apparatus fiber optic loop of optical fibre gyro is carried out to magnetic protection and carrying.
For a double-deck magnetic protection carrier ring device for high-precision optical fiber gyro, 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 inner sleeve, magnetic shielding capping, fiber optic loop, Y waveguide and draws fine terminal, supporter adopts non-shielding material, for the integrative-structure that crossbeam, contiguous block A and contiguous block B form being installed by ring-type chassis A, sleeve A, Y waveguide, ring-type chassis A inner periphery is circumferentially connected with sleeve A bottom, and ring-type chassis A outer circumferential edges is downward flanging; Y waveguide is installed crossbeam and is arranged on sleeve A madial wall, and Y waveguide is installed crossbeam lower surface middle part indent, forms Y waveguide mounting groove, and Y waveguide is fixed in Y waveguide mounting groove; Sleeve A madial wall top is circumferentially evenly equipped with at least 2 contiguous block A, has capping fixing threaded hole and upper cover fixing threaded hole and slotted panel oncomelania hole on each contiguous block A; One end of slotted panel nail is fixed through slotted panel oncomelania hole and contiguous block B by contiguous block B below; Circumferentially be evenly equipped with at least 2 contiguous block B in sleeve A madial wall bottom, on contiguous block B, have base fixing threaded hole; 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.
Magnetic shielding inner sleeve is the integrative-structure being made up of ring-type chassis B, sleeve B; Wherein, B inner periphery in ring-type chassis is circumferentially connected with sleeve B bottom; Between sleeve B and sleeve A, interfix, sleeve B is socketed in sleeve A outside, makes ring-type chassis B lower surface and the laminating of ring-type chassis A upper surface; It is upper that fiber optic loop is enclosed within sleeve B, and the adhesive surface of fiber optic loop is bonded on annular disc B; Described magnetic shielding inner sleeve adopts band gum foil, 1J50 or 1J79, uses between glue and supporter bonding by aviation; Above-mentioned ring-type chassis B and the corresponding breach that has in A outer circumferential edges place, ring-type chassis.
The described magnetic shielding capping annular of serving as reasons is taken over a business the integrative-structure forming with ring-type outer wall and lug, and the excircle that annular is taken over a business is circumferentially connected with ring-type outer wall top, and annular is taken over a business circumferential uniform Design on inner periphery lug; Concrete connected mode between magnetic shielding capping and supporter is: in magnetic shielding capping ring-type outer wall bottom face, annular take over a business respectively with magnetic shielding inner sleeve in after annular chassis B upper surface, the laminating of sleeve B top end face, each lug is coordinated with each contiguous block A in supporter, by bolt, lug and contiguous block A are fixedly tightened.
In supporter, annular chassis A lower surface week upwards has four arc line shaped projections, and the arc core of four arc line shaped projections and annular chassis A center concurrent, by four arc line shaped projections, annular chassis A is divided into inside and outside two circles; Y waveguide is installed on crossbeam and is installed with and draws fine terminal, draws relative one end of single channel tail optical fiber external part that fine terminal is positioned at Y waveguide the Y waveguide on crossbeam is installed;
Outer field magnetic shielding outer cover comprises upper cover 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 through screws coordinates and tightens with the base fixing threaded hole on contiguous block B in supporter, realizes thus fixing between base and internal layer magnetic shielding encapsulating structure; On base, also have and draw fine terminal embedded hole, draw fine terminal and be embedded in lead terminal optical fiber hole, make the single channel tail optical fiber of Y waveguide be positioned at base exterior by drawing after fine terminal passes; Draw fine terminal and adopt 1J50 or 1J79; Meanwhile, after base is fixing, in supporter, needs to ensure 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 base inner bottom surface.
Described upper cover is the tubular structure of top seal, and the top of upper cover has circular platform type concave configuration, and the internal diameter of upper cover is identical with the internal diameter of base, and upper cover is installed crossbeam by the upper cover fixing threaded hole on contiguous block A in bolt and supporter 1 and Y waveguide and tightened fixing; After upper cover is fixing, the lower surface of upper cover engages with the upper surface of base; Internal layer magnetic shielding encapsulating structure and outer magnetic shielding cover on outward on comprehensive and do not contact; In upper cover top surface, have slotted panel nail and pass hole, slotted panel nail passes hole through one end of contiguous block B by slotted panel nail and passes upper cover top surface; In upper cover top surface, also have plug connector cable hole, the signal output part in Y waveguide can pass plug connector cable hole by electric wire and be connected with outside plug connector.
The invention has the advantages that:
1, the present invention, for the double-deck magnetic protection carrier ring device of high-precision optical fiber gyro, adopts inside and outside two-layer magnetic shielding, can compound bi-material, and good compared with individual layer stack pile homogenous material shield effectiveness, improve the application of optical fibre gyro at various magnetic field environments;
2, the present invention is 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, there is no flux path, improves Magnetic Shielding Effectiveness;
3, the present invention is 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, ensure that gyro has six higher positional precisions;
4, the present invention, for the double-deck magnetic protection carrier ring device of high-precision optical fiber gyro, can realize Y waveguide two-way tail optical fiber and coil with single channel tail optical fiber subregion, does not cause cross-laminatedly, is conducive to improve Gyro Precision;
5, the present invention is for the double-deck magnetic protection carrier ring device of high-precision optical fiber gyro, considers using the fiber optic loop in optical fibre gyro and Y waveguide as a modular unit in design.
Brief description of the 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.
In figure:
1-magnetic shielding encapsulating structure 2-magnetic shielding outer cover 101-supporter 102-magnetic shielding inner sleeve
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-upper cover fixing threaded hole 101k-slotted panel oncomelania hole 101l-slotted panel nail
101m-base fixing threaded hole 101n-breach 101p-arc line shaped projection
101q-draws fine terminal mounting hole 102a-ring-type chassis B 102b-sleeve B
103a-annular is taken over a business 103b-ring-type outer wall 103c-lug 201-upper cover
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
Below in conjunction with accompanying drawing, the present invention will be further described.
The present invention is 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 forms 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 by outer magnetic shielding outer cover 2, internal layer magnetic shielding encapsulating structure 1 is encapsulated, form thus double-deck magnetic protection, and isolation completely between two-layer magnetic protective device, magnetic medium conducting be there is no.
Wherein, the magnetic shielding encapsulating structure 1 of internal layer comprises supporter 101, magnetic shielding inner sleeve 102, magnetic shielding capping 103, fiber optic loop 104, Y waveguide 105 and draw fine terminal 106, as Fig. 2, Fig. 3, shown in Fig. 4, supporter 101 adopts aluminum alloy materials (non-magnetic shielding material), for by ring-type chassis A101a, sleeve A101b, Y waveguide is installed crossbeam 101c, the integrative-structure that contiguous block A101d and contiguous block B101e form, ring-type chassis A101a inner periphery is circumferentially connected with sleeve A101b bottom, ring-type chassis A101a outer circumferential edges is downward flanging 101f, ring-type chassis A101a, sleeve A101b is used for respectively supporting and orientation magnetic shielding inner sleeve 102, Y waveguide is installed crossbeam 101c and is arranged on sleeve A101b madial wall, Y waveguide is installed crossbeam 101c lower surface middle part indent, form Y waveguide mounting groove 101g, on Y waveguide mounting groove 101g, have tapped through hole 101h and be used for fixing Y waveguide 105, be also used for fixing the upper cover 201 of outer magnetic shielding outer cover 2 simultaneously, coordinate with tapped through hole 101h by screw, Y waveguide 105 is fixed in Y waveguide mounting groove 101g, as shown in Figure 4, by 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 is circumferentially evenly equipped with at least 2 contiguous block A101d, on each contiguous block A101d, have capping fixing threaded hole 101i and upper cover fixing threaded hole 101j and slotted panel oncomelania hole 101k, be used for fixing respectively the upper cover 201 of magnetic shielding capping 103, outer magnetic shielding outer cover 2 and slotted panel nail 101l is installed.Wherein, one end of slotted panel nail 101l is by contiguous block B101e below through slotted panel oncomelania hole 101k, and B101e fixes with contiguous block.Circumferentially be evenly equipped with at least 2 contiguous block B101e in sleeve A101b madial wall bottom, on contiguous block B101e, have base fixing threaded hole 101m, 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.
Magnetic shielding inner sleeve 102 integrative-structure for being made up of ring-type chassis B102a, sleeve B102b, is used for positioning optical waveguides ring 104.Wherein, B102a inner periphery in ring-type chassis is circumferentially connected with sleeve B102b bottom; The internal diameter of sleeve B102b equals the external diameter of sleeve A101b, sleeve B102b is socketed in sleeve A101b outside, make ring-type chassis B102a lower surface and the laminating of ring-type chassis A101a upper surface, and the width of ring-type chassis B102a equals the width of ring-type chassis A101a, between magnetic shielding inner sleeve and supporter, fix by gluing.It is upper that the fiber optic loop 104 of de-skeleton is enclosed within sleeve B102b, and the adhesive surface of fiber optic loop 104 (fiber optic loop 104 bottom surfaces) is bonded on annular disc B102a.Realize thus the ground floor magnetic shielding of fiber optic loop 104 madial walls and bottom surface by magnetic shielding inner sleeve 102.The thick 0.5mm of above-mentioned magnetic shielding inner sleeve 102, can directly adopt band gum foil, thus realize and supporter 101 between bonding.Magnetic shielding inner sleeve 102 also can add iron-nickel alloy material 1J50 or 1J79 by employing machine, uses between glue and supporter 101 bonding by aviation.
Above-mentioned ring-type chassis B102a have breach 101n corresponding to A101a outer circumferential edges place, ring-type chassis, as shown in Figure 1, as the cabling mouth of fiber optic loop 4.
Described 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 form, as shown in Figure 2, thickness is 0.5～1mm, the excircle that annular is taken over a business 103a is circumferentially connected with ring-type outer wall 103b top, and annular is taken over a business circumferential uniform Design on 103a inner periphery lug 103c.Concrete connected mode between magnetic shielding capping 103 and supporter 101 is: in magnetic shielding capping 103 ring-type outer wall 103b bottom face, annular take over a business 103a respectively with magnetic shielding inner sleeve 102 in after the laminating of annular chassis B102a upper surface, sleeve B102b top end face, each lug 103c is coordinated with each contiguous block A101d in supporter 101, by bolt, lug 103c and contiguous block A101d are fixedly tightened, realize thus relative fixing between supporter 101 and magnetic shielding capping 103.Be connected by magnetic shielding capping 103 and supporter 101, form and be used for the fiber optic loop placed cavity of packaged fiber ring, reach the object of packaged fiber ring 104.Can not produce relativity shift when making supporter 101 and magnetic shielding capping 103 fixing, therefore, as shown in Figure 3, the ring-type chassis A101a outer circumferential edges in supporter 101 is designed to step edge, is used for the bottom surface circumference of annular outer wall 103b in orientation magnetic shielding capping 103.
In supporter 101, upwards there are four arc line shaped projection 101p annular chassis A101a lower surface week, and the arc core of four arc line shaped projection 101p and annular chassis A101a center concurrent, by four arc line shaped projection 101p, annular chassis A is divided into inside and outside two circles thus, arc line shaped projection 101p and annular chassis A are so upper that to be outer ring between flanging, as the district of detouring of the two-way tail optical fiber of fiber optic loop and Y waveguide 105; In arc line shaped projection 101p and supporter 101, between contiguous block B101e, be inner ring, as the single channel tail optical fiber of Y waveguide 105 district of detouring.Y waveguide is installed on crossbeam 101c and is had and draw fine terminal mounting hole 101q, draw relative one end of single channel tail optical fiber external part that fine terminal mounting hole 101q is positioned at Y waveguide the Y waveguide 105 on crossbeam 101c is installed, draw fine terminal mounting hole 101q and be used for fixing the fine terminal 106 that draws of being made by magnetic shielding material, can will draw fine terminal 106 A101a bottom surfaces, stationary annular chassis by screw, the single channel tail optical fiber of Y waveguide 105 can pass through drawing fine terminal 106 after inner ring coiling.Can realize the two-way tail optical fiber of Y waveguide 105 and the coiling of single channel tail optical fiber subregion by said structure, not cause cross-laminatedly, be conducive to improve Gyro Precision.
Outer field magnetic shielding outer cover 2 comprises upper cover 201 and base 202, and upper cover 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, for the tubular structure of bottom sealing, is used for holding internal layer magnetic shielding encapsulating structure 1; Base 202 is coordinated and tightens with the base fixing threaded hole 101m on contiguous block B101e in supporter 1 by screw, realizes thus fixing between base 202 and internal layer magnetic shielding encapsulating structure 1.On base 202, also have and draw fine terminal embedded hole 202a, draw fine terminal 106 and be embedded in lead terminal optical fiber hole 202a, make can make thus the single channel tail optical fiber of Y waveguide 105 to be positioned at base 202 outsides by drawing after fine terminal passes; In the present invention, draw the high-permeability material of the same 1J50 of employing of fine terminal 106 or 1J79, embed drawing after fine terminal embedded hole 202a on base 202 drawing fine terminal 106 thus, make to 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 fixing, 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 in supporter 101, need to ensure ring-type chassis A101a, makes thus can form continuous magnetic loop between outer field magnetic shielding outer cover 2 and internal layer magnetic shielding encapsulating structure 1.
The tubular structure that described upper cover 201 is top seal, the top of upper cover 201 has circular platform type concave configuration 203, the internal diameter of upper cover 201 is identical with the internal diameter of base 202, upper cover 201 is coordinated and tightens with the tapped through hole 101h on upper cover fixing threaded hole 101j and Y waveguide mounting groove 101g on contiguous block A101d in supporter 1 by bolt, realizes thus fixing between upper cover 201 and internal layer magnetic shielding encapsulating structure 1.After upper cover 201 is fixing, the lower surface of upper cover 201 engages with the upper surface of base 202, realizes thus the second layer magnetic shielding of internal layer magnetic shielding encapsulating structure 1 by upper cover 201 and base 202.On upper cover 201 end faces, have slotted panel nail and pass hole 201a, slotted panel nail 101l can pass hole 201a by slotted panel nail through one end of contiguous block B101e and pass upper cover 201 end faces, follow closely 101l realize the double-deck magnetic of the present invention and protect carrier ring device entirety and be connected with external agency by slotted panel.On upper cover 201 end faces, also have plug connector cable hole 201b, signal output part in Y waveguide 105 can pass plug connector cable hole by electric wire and be connected with outside plug connector, realize the signal output of Y waveguide 105 by 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, need to ensure in the plane of upper cover 20 1 and the joint of base in outer magnetic shielding outer cover 2 and internal layer magnetic shielding encapsulating structure 1 supporter 101 with the plane of magnetic shielding capping 103 joints not in same level, can improve thus the protection effect of the double-deck magnetic shielding of the present invention, and to ensure that internal layer magnetic shielding encapsulating structure 1 does not contact on comprehensive with outer magnetic shielding outer cover 2, between base 202 inner bottom surfaces and annular disc 101a basal spacing in supporter 1, base 202 medial surfaces and magnetic shielding capping 103 lateral surface spacing, upper cover 201 inner top surfaces and magnetic shielding capping 103 upper surface spacing and upper cover 201 medial surfaces and magnetic shielding capping 103 lateral surfaces, do not contact.
Be formed for the double-deck magnetic protection carrier ring device of high-precision optical fiber gyro by said structure, in said structure, capping fixing threaded hole 101i and upper cover fixing threaded hole 101j and base fixing threaded hole 101m are blind hole, and capping fixing threaded hole 101i, upper cover fixing threaded hole 101j, base fixing threaded hole 101m and slotted panel screw 101k are positioned on same circumference, are convenient to process and assemble.In magnetic shielding capping 103, 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 upper cover 201 and end face and base 202 sidewalls and bottom surface, fillet r >=3mm, can improve the magnetic shield performance that whole double-deck magnetic protects carrier ring device thus.
By calculating and simulation analysis, the shield effectiveness of double-deck magnetic protective device of the present invention is obviously better than 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 the distribution of material of magnetic protective layer according to different magnetic field application environment.As, needing in the situation of the outside high-intensity magnetic field of shielding, outer field magnetic shielding outer cover 2 can be selected and be difficult for saturated material, as silicon steel; Internal layer magnetic shielding encapsulating structure 1 can be selected the high permeability material easily reaching capacity, as permalloy etc.
Claims (10)
1. for a double-deck magnetic protection carrier ring device for high-precision optical fiber gyro, comprise internal layer magnetic shielding encapsulating structure and outer magnetic shielding outer cover; It is characterized in that: the magnetic shielding encapsulating structure of internal layer comprises supporter, magnetic shielding inner sleeve, magnetic shielding capping, fiber optic loop, Y waveguide and draws fine terminal, supporter adopts non-shielding material, for the integrative-structure that crossbeam, contiguous block A and contiguous block B form being installed by ring-type chassis A, sleeve A, Y waveguide, ring-type chassis A inner periphery is circumferentially connected with sleeve A bottom, and ring-type chassis A outer circumferential edges is downward flanging; Y waveguide is installed crossbeam and is arranged on sleeve A madial wall, and Y waveguide is installed crossbeam lower surface middle part indent, forms Y waveguide mounting groove, and Y waveguide is fixed in Y waveguide mounting groove; Sleeve A madial wall top is circumferentially evenly equipped with at least 2 contiguous block A, has capping fixing threaded hole and upper cover fixing threaded hole and slotted panel oncomelania hole on each contiguous block A; One end of slotted panel nail is fixed through slotted panel oncomelania hole and contiguous block B by contiguous block B below; Circumferentially be evenly equipped with at least 2 contiguous block B in sleeve A madial wall bottom, on contiguous block B, have base fixing threaded hole; 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;
Magnetic shielding inner sleeve is the integrative-structure being made up of ring-type chassis B, sleeve B; Wherein, B inner periphery in ring-type chassis is circumferentially connected with sleeve B bottom; Between sleeve B and sleeve A, interfix, sleeve B is socketed in sleeve A outside, makes ring-type chassis B lower surface and the laminating of ring-type chassis A upper surface; It is upper that fiber optic loop is enclosed within sleeve B, and the adhesive surface of fiber optic loop is bonded on annular disc B; Described magnetic shielding inner sleeve adopts band gum foil, 1J50 or 1J79, uses between glue and supporter bonding by aviation; Above-mentioned ring-type chassis B and the corresponding breach that has in A outer circumferential edges place, ring-type chassis;
The described magnetic shielding capping annular of serving as reasons is taken over a business the integrative-structure forming with ring-type outer wall and lug, and the excircle that annular is taken over a business is circumferentially connected with ring-type outer wall top, and annular is taken over a business circumferential uniform Design on inner periphery lug; Concrete connected mode between magnetic shielding capping and supporter is: in magnetic shielding capping ring-type outer wall bottom face, annular take over a business respectively with magnetic shielding inner sleeve in after annular chassis B upper surface, the laminating of sleeve B top end face, each lug is coordinated with each contiguous block A in supporter, by bolt, lug and contiguous block A are fixedly tightened;
In supporter, annular chassis A lower surface week upwards has four arc line shaped projections, and the arc core of four arc line shaped projections and annular chassis A center concurrent, by four arc line shaped projections, annular chassis A is divided into inside and outside two circles; Y waveguide is installed on crossbeam and is installed with and draws fine terminal, draws relative one end of single channel tail optical fiber external part that fine terminal is positioned at Y waveguide the Y waveguide on crossbeam is installed;
Outer field magnetic shielding outer cover comprises upper cover 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 through screws coordinates and tightens with the base fixing threaded hole on contiguous block B in supporter, realizes thus fixing between base and internal layer magnetic shielding encapsulating structure; On base, also have and draw fine terminal embedded hole, draw fine terminal and be embedded in lead terminal optical fiber hole, make the single channel tail optical fiber of Y waveguide be positioned at base exterior by drawing after fine terminal passes; Draw fine terminal and adopt 1J50 or 1J79; Meanwhile, after base is fixing, in supporter, needs to ensure 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 base inner bottom surface; Described upper cover is the tubular structure of top seal, and the top of upper cover has circular platform type concave configuration, and the internal diameter of upper cover is identical with the internal diameter of base, and upper cover is installed crossbeam by the upper cover fixing threaded hole on contiguous block A in bolt and supporter 1 and Y waveguide and tightened fixing; After upper cover is fixing, the lower surface of upper cover engages with the upper surface of base; Internal layer magnetic shielding encapsulating structure and outer magnetic shielding cover on outward on comprehensive and do not contact; In upper cover top surface, have slotted panel nail and pass hole, slotted panel nail passes hole through one end of contiguous block B by slotted panel nail and passes upper cover top surface; In upper cover top surface, also have plug connector cable hole, the signal output part in Y waveguide can pass plug connector cable hole by electric wire and be connected with outside plug connector.
2. a kind of double-deck magnetic protection carrier ring device for high-precision optical fiber gyro as claimed in claim 1, is characterized in that: described supporter adopts aluminum alloy materials.
3. a kind of double-deck magnetic protection carrier ring device for high-precision optical fiber gyro as claimed in claim 1, is characterized in that: described outer field magnetic shielding outer cover is silicon steel, and internal layer magnetic shielding encapsulating structure is permalloy.
4. a kind of double-deck magnetic protection carrier ring device for high-precision optical fiber gyro as claimed in claim 1, is characterized in that: the central point that described 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 for high-precision optical fiber gyro as claimed in claim 1, is characterized in that: the width of described ring-type chassis B equals the width of ring-type chassis A.
6. a kind of double-deck magnetic protection carrier ring device for high-precision optical fiber gyro as claimed in claim 1, is characterized in that: described capping fixing threaded hole and upper cover fixing threaded hole and base fixing threaded hole are blind hole.
7. a kind of double-deck magnetic protection carrier ring device for high-precision optical fiber gyro as claimed in claim 1, is characterized in that: described capping fixing threaded hole, upper cover fixing threaded hole, base fixing threaded hole and slotted panel screw are positioned on same circumference.
8. a kind of double-deck magnetic protection carrier ring device for high-precision optical fiber gyro as claimed in claim 1, is characterized in that: the ring-type chassis A outer circumferential edges in described supporter is designed to step edge.
9. a kind of protection of the double-deck magnetic for high-precision optical fiber gyro carrier ring device as claimed in claim 1, is characterized in that: in described outer magnetic shielding outer cover, in the plane of the joint of upper cover and base and internal layer magnetic shielding encapsulating structure, the plane of supporter and magnetic shielding capping joint is not coplanar.
10. a kind of double-deck magnetic protection carrier ring device for high-precision optical fiber gyro as claimed in claim 1, it is characterized in that: in described magnetic shielding capping annular take over a business with ring-type outer wall between, between between the sidewall of upper cover and end face and base side wall and bottom surface, all adopt rounding off to be connected, fillet r >=3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210077918.7A CN102620728B (en) | 2012-03-22 | 2012-03-22 | Double-layer magnetic shielding and bearing ring device suitable for high-precision fiber-optic gyroscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210077918.7A CN102620728B (en) | 2012-03-22 | 2012-03-22 | Double-layer magnetic shielding and bearing ring device suitable for high-precision fiber-optic gyroscope |
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| Publication Number | Publication Date |
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| CN102620728A CN102620728A (en) | 2012-08-01 |
| CN102620728B true CN102620728B (en) | 2014-10-01 |
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| CN201210077918.7A Active CN102620728B (en) | 2012-03-22 | 2012-03-22 | Double-layer magnetic shielding and bearing ring device suitable for high-precision fiber-optic gyroscope |
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| CN103674005B (en) * | 2012-09-07 | 2016-09-14 | 中国航空工业第六一八研究所 | A kind of optical fibre gyro magnetic shielding cover |
| 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 |
| 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 |
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| 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 |
| 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 |
| CN105403213B (en) * | 2015-12-07 | 2017-12-22 | 北京航天时代光电科技有限公司 | A kind of temperature control method of photodetachment formula fibre optic gyroscope light 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 |
| CN105806328B (en) * | 2016-03-09 | 2018-12-25 | 浙江大学 | A kind of shielding construction improving optical fibre gyro optical fiber ring performance |
| 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 |
| 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 |
| CN116026312B (en) * | 2023-03-31 | 2023-05-30 | 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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