CN109186579B - Portable spin-exchange-relaxation-free atomic gyroscope structure - Google Patents
Portable spin-exchange-relaxation-free atomic gyroscope structure Download PDFInfo
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- CN109186579B CN109186579B CN201811299014.2A CN201811299014A CN109186579B CN 109186579 B CN109186579 B CN 109186579B CN 201811299014 A CN201811299014 A CN 201811299014A CN 109186579 B CN109186579 B CN 109186579B
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- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
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Abstract
The invention discloses a portable spin-exchange-free relaxation atomic gyroscope structure which comprises an alkali metal air chamber fixing seat, a non-magnetic electric heating base, a magnetic field compensation coil framework, a magnetic shielding cylinder, a detection laser base, a detection light beam splitting assembly, a pumping laser base, a pumping light beam expanding assembly, a pumping light stabilizing component, a main structure, a positioning tool and a supporting base. The alkali metal air chamber fixing seat is used for fixing the alkali metal air chamber, and the non-magnetic electric heating base is used for clamping the oven. The detection light beam splitting assembly adopts a BS and Glan prism integrated fixed structure. The pumping light beam expanding assembly is embedded in the reinforcing rib of the main structure. The pumping light intensity stabilizing component adopts a PBS and liquid crystal phase delayer connected fixed structure. The main structure adopts a sub-cavity design combining sinking type and suspension type. The supporting base is used for fixing the main structure and providing an installation reference for the gyroscope. The invention has compact and symmetrical structure, small volume and light weight, and adopts the optical component integrated fixed structure to enhance the stability of optical performance.
Description
Technical Field
The invention relates to a portable spin-exchange-relaxation-free atomic gyroscope structure, which adopts the design of combining sinking fixation and suspension fixation of components, has the characteristics of stability, compactness and symmetry, reduces the volume and weight of the gyroscope, and enhances the stability of optical performance by adopting an optical component integrated fixation structure.
Background
With the rapid development of quantum technology, the detection of the angle rate by using a quantum sensor and the like also become a new research direction for supporting the development of a long-endurance and high-precision inertial navigation system in the future. At present, an atomic gyroscope based on a Spin-Exchange-Relaxation (SERF) principle has theoretical accuracy far higher than that of the existing measurement means, can realize miniaturization and integration, and is concerned by relevant research institutions at home and abroad.
The currently researched spin-exchange-free relaxation atomic gyroscope has the advantages that one part of the currently researched spin-exchange-free relaxation atomic gyroscope is large in size, the design with small size only adopts a sinking type cavity-dividing structure, mutual interference among parts such as pumping light and detection light is isolated, the miniaturization is not facilitated, the structure is asymmetric, and an alkali metal gas chamber is located at the edge of the gyroscope and not beneficial to the practical application of angular rate measurement; in addition, the design of a wiring groove is not considered in the conventional SERF atomic gyroscope, so that a signal wire cannot be stably and tidily fixed, and electrical interference is introduced; all adopt the fixed each part of disconnect-type mirror holder among the current SERF atomic gyroscope, easily cause optical characteristic unstable to be unfavorable for the miniaturized design of gyroscope, increase the work load of dismouting.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the conventional SERF atomic gyroscope structure are overcome, the portable design with the symmetrical and compact structure is provided, the component mirror bracket is integrally fixed, the stability of the component is enhanced, the miniaturization assembly and debugging are facilitated, the internal wiring groove is reasonably designed, and the electrical interference is reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a portable no spin exchange relaxation atomic gyroscope structure, includes alkali metal air chamber fixing base, does not have magnetism electrical heating base, magnetic field compensation coil skeleton, a magnetism shielding section of thick bamboo, detects the laser instrument base, detects the optical beam splitting subassembly, pumps the laser instrument base, pumps the optical beam expanding subassembly, pumps the stable light intensity subassembly of light, location frock, main structure and support base. The alkali metal air chamber fixing seat is used for clamping a spherical glass air chamber filled with alkali metal, the non-magnetic electric heating base is used for clamping the alkali metal air chamber fixing seat and is used for adhering a heating film, the magnetic field compensation coil framework provides an installation reference for the non-magnetic electric heating base, the non-magnetic electric heating base is fastened through a non-magnetic material screw, and then coaxial positioning of a pumping light-passing light hole of the main structure is achieved through shaft hole matching. The magnetic shielding barrel assembly is of a four-layer shielding structure, the magnetic shielding effect of the gyroscope is effectively improved, positioning is achieved through the plastic support ring between each layer of shielding barrel, and finally, the overall position is fixed through the demagnetizing rod and the positioning tool. The detection laser base is used for fixing the detection laser tube, is hung and fastened on the main structure through screws, and provides a stable detection light source for the gyroscope. The detection light beam splitting assembly fixes the BS and the Glan prism in a connected mode through the connected mirror bracket, the detection light is fastened on the main structure through screws, the detection light is divided into two beams by the BS, one beam of detection light enters the magnetic shielding barrel assembly after being deflected through the Glan prism as a first path, the other beam of detection light is reflected to the bottom of the main structure as a second path of detection light, and the detection light enters the magnetic shielding barrel assembly again after passing through the reflector. The pumping laser base is used for fixing the pumping light laser tube, and the assembly is fixed in a hanging mode on the main structure through the positioning hole and the screw, so that a stable pumping light source is provided for the gyroscope. The pumping light beam expanding assembly is fixed with the through hole through the screw and is embedded in the main structure reinforcing rib, so that the space is saved, and the stability of the pumping light beam expanding assembly is improved. The pumping light stabilizing light intensity component is fixed by the conjoined mirror bracket, pumping light is divided into two beams by the PBS, one beam is used for stabilizing light intensity, and the other beam is folded into the bottom of the main structure and is used for saturating, absorbing and stabilizing frequency of the pumping light. The main structure provides the installation benchmark for each part of gyroscope, and each part passes through the locating hole location on the main structure to utilize the screw fastening, support the base and provide stable benchmark for whole device.
The main structure adopts the cavity-separating design of combining sinking type and suspension type, separates pumping light path components, detection light path components and electrical plugs, avoids mutual interference among the components, positions the components through positioning holes, and fastens the components on the main structure by screws.
The main structure is inserted into the clamping groove of the supporting base through the protruding part at the bottom and is fastened on the supporting base through the screw, so that the reference stability of the device is improved, the main structure is connected with the supporting base through the heat insulation pad with low heat conductivity, the temperature stability of the main structure is improved, and the influence of environmental temperature change on all parts in the gyroscope is reduced.
The detection light beam splitting assembly adopts the conjoined mirror bracket to fix the BS and the Glan prism in a conjoined mode, the BS is fastened on the main structure through screws, the BS divides the detection light into two beams, one beam of light is deflected through the Glan prism and then enters the magnetic shielding cylinder assembly as the first path of detection light, the other beam of light is reflected to enter the bottom of the main structure, the light enters the magnetic shielding cylinder assembly as the second path of detection light after being reflected by the reflector installed at the bottom, the second path of detection light is perpendicular to the first path of detection light, the measurement of biaxial inertial angular rate is realized, the installation stability of an optical device is improved, and the assembly steps are simplified.
The pumping light stabilizing light intensity assembly adopts the connected mirror bracket to fix the PBS and the liquid crystal phase delayer in a connected mode, the PBS is fastened on the main structure through screws and used for polarizing the pumping light and dividing the pumping light into two beams, one beam of the pumping light enters the magnetic shielding barrel assembly through the light stabilizing light intensity device in a reflected mode, the other beam of the pumping light enters the bottom of the main structure, and the pumping light stabilizing light intensity assembly is used for saturation absorption frequency stabilization after passing through the reflecting mirror installed at the bottom of the main structure.
Compared with the prior art, the invention has the advantages that:
(1) the main structure of the invention adopts a cavity-separating design combining sinking type and suspension type, and separates a pumping light path component, a detection light path component and an electrical plug, thereby reducing the volume and the weight of the gyroscope, playing an important role in the integrated development of the gyroscope, simultaneously avoiding the mutual interference among all the components, reasonably designing an internal wiring groove, and reducing the internal electrical noise interference of the gyroscope.
(2) The main structure is inserted into the clamping groove of the supporting base through the protruding part at the bottom and is fastened on the supporting base through the screw, so that a stable reference is provided for the whole gyroscope, the main structure is connected with the supporting base through the heat insulation pad with low heat conductivity, the temperature stability of the main structure is improved, and the influence of environmental temperature change on each part in the gyroscope is reduced.
(3) The detection light beam splitting assembly and the pumping light intensity stabilizing assembly are fixed by the integrated mirror bracket and are fastened on the main structure by screws, so that the mounting stability of an optical device is improved, and the optical device is convenient to disassemble, assemble and debug.
(4) The magnetic shielding cylinder assembly realizes the design of a four-layer shielding structure under a small volume, realizes positioning between each layer of shielding cylinder through the plastic support ring, and finally realizes the integral position fixation through the demagnetizing rod and the positioning tool.
(5) The invention has the advantages of small volume, symmetrical structure, high integration level, easy assembly and important engineering practical value.
Drawings
FIG. 1 is a simplified diagram of a portable spin-exchange relaxation-free atomic gyroscope according to the present invention;
FIG. 2 is an isometric, rear and right side view of the main structure and support base of the present invention, wherein FIG. 2(a) is an isometric view, FIG. 2(b) is a rear view and FIG. 2(c) is a right side view;
fig. 3 is an axial sectional view and an end view of a magnetic shield cylinder assembly of the present invention, wherein fig. 3(a) is an axial sectional view and fig. 3(b) is an end view;
FIG. 4 is a schematic diagram of a test beam splitting assembly according to the present invention;
the reference numbers in the figures mean: 1 is an alkali metal air chamber fixing seat, 2 is a non-magnetic electric heating base, 3 is a magnetic field compensation coil framework, 4 is a magnetic shielding cylinder component, 5 is a detection laser base, 6 is a detection light beam splitting component, 7 is a pumping laser base, 8 is a pumping light beam expanding component, 9 is a pumping light intensity stabilizing component, 10 is a positioning tool, 11 is a main structure, 12 is a supporting base, 101 is a first light through hole, 102 is a ceramic backing plate, 103 is a first threaded hole, 104 is a second light through hole, 105 is a second threaded hole, 106 is an SMA plug positioning hole, 107 is a first threaded clearance hole, 108 is a third light through hole, 109 is a wiring groove, 201 is a first positioning hole, 202 is a third threaded hole, 203 is a fourth light through hole, 204 is a second threaded clearance hole, 205 is a fourth threaded hole, 206 is a first reference surface, 301 is a supporting ring, 302 is a first spacer ring, 303 is a second spacer ring, and 304 is a third positioning hole, 305 is a fifth light through hole, 306 is a fourth positioning hole, 501 is a sixth light through hole, and 502 is a third thread clearance hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the invention provides a portable spin-exchange-free relaxation atomic gyroscope structure, which comprises an alkali metal gas chamber fixing seat 1, a nonmagnetic electric heating base 2, a magnetic field compensation coil framework 3, a magnetic shielding cylinder assembly 4, a detection laser base 5, a detection light beam splitting assembly 6, a pumping laser base 7, a pumping light beam expanding assembly 8, a pumping light stabilizing light intensity assembly 9, a positioning tool 10, a main structure 11 and a supporting base 12. The alkali metal air chamber fixing seat 1 is used for clamping a spherical glass air chamber filled with alkali metal, the non-magnetic electric heating base 2 is used for clamping the alkali metal air chamber fixing seat and is used for adhering a heating film, the magnetic field compensation coil framework 3 provides an installation reference for the non-magnetic electric heating base and is fastened through non-magnetic material screws, and coaxial positioning of pumping light-passing light holes of the main structure 11 is achieved through shaft hole matching. The magnetic shielding cylinder assembly 4 is of a four-layer shielding structure, and the magnetic shielding effect is effectively improved. The detection laser base 5 is used for fixing a detection laser tube, is hung and fastened on the main structure 11 through screws, and provides a stable detection light source for the gyroscope. Detect light beam splitting subassembly 6 and fix BS and glan prism disjunctor through disjunctor formula mirror holder to utilize the screw fastening on main structure 11, detect the light and be divided into two bundles by BS, a branch is as first detection light and gets into magnetic shield section of thick bamboo subassembly 4 through glan prism polarization back, another bundle is as second detection light reflection to main structure 11 bottom, gets into magnetic shield section of thick bamboo subassembly 4 again behind the speculum. The pumping light laser base 7 is used for fixing a pumping laser tube, and is fixed on the main structure 11 in a hanging mode through the positioning holes and the screws, so that a stable pumping light source is provided. Pumping light beam expanding assembly 8 passes through the fix with screw and inlays in 11 strengthening ribs of main structure, reduces the space and improves pumping light beam expanding assembly 8 stability. The pumping light stabilizing light intensity component 9 is fixed by adopting an integrated mirror bracket, pumping light is divided into two beams by PBS (Poly Butylene succinate), one beam is used for stabilizing light intensity, and the other beam is folded into the bottom of the main structure 11 and is used for saturating, absorbing and stabilizing the frequency of the pumping light. The main structure 11 provides the installation benchmark for each part, and each part passes through the locating hole location on the main structure 11 to utilize the screw fastening, support base 12 provides stable benchmark for whole top.
Fig. 2 is an axial side view, a rear view and a right side view of the main structure 11 and the support base 12 of the present invention, wherein fig. 2(a) is an axial side view, fig. 2(b) is a rear view and fig. 2(c) is a right side view. The main structure 11 provides a mounting reference for all the components of the top and is fastened to the support base 12 by screws with the first threaded clearance holes 107. A second threaded hole 105 in the main structure 11 is used to locate and secure the detection laser assembly 5. The ceramic backing plate 102 is fixed on the main structure 11 through a positioning hole, the detection light beam splitting assembly 6 is fixed in position through a first threaded hole 103 and a second light through hole 104, the second path of detection light enters the bottom of the main structure 11 through a third light through hole 108, enters the magnetic shielding barrel assembly 4 after being reflected by a reflector, and finally exits from the first light through hole 101 and is used for detection. A third threaded hole 202 in the main structure 11 is used to locate and secure the pumping laser mount 7. The pumping light beam expanding assembly 8 is positioned by the first positioning hole 201 and is fastened in 4 screw holes on the periphery by screws. The fourth through hole 203, the first light through hole 101 and the first reference surface 206 on the main structure 11 are used for positioning the magnetic shield cylinder assembly 4, and the two demagnetizing rods are positioned through the fourth threaded hole 205. The magnetic field compensation coil framework 3 is coaxially positioned through the fourth through hole 203 on the main structure 11 and is fixed through the second thread clearance hole 204 by using a screw.
Fig. 3 is an axial sectional view and an end view of the magnetic shield cylinder assembly 4 of the present invention, in which fig. 3(a) is an axial sectional view and fig. 3(b) is an end view. The magnetic shielding cylinder assembly 4 provides an installation reference for the alkali metal air chamber fixing seat 1, the non-magnetic electric heating base 2 and the magnetic field compensation coil framework 3, the magnetic field compensation coil framework 3 realizes coaxial positioning through the third positioning hole 304 and the fifth light through hole 305, and meanwhile, the fifth light through hole 305 also provides a positioning reference for the alkali metal air chamber fixing seat 1 and the non-magnetic electric heating base 2. The magnetic shield barrel assembly 4 is of a four-layer magnetic shield structure, and positioning is realized among layers through cooperation among the support ring 301, the first spacer ring 302 and the second spacer ring 303. The demagnetizing rod passes through the fourth positioning hole 306, and the overall positioning of the magnetic shield assembly 4 is realized.
Fig. 4 is a structural view of the detecting light beam splitting assembly of the present invention, which is fixed to the first screw hole 103 of the ceramic backing plate 108 by a screw and a third screw clearance hole 502. The detection light is split by the BS, one beam of the detection light as a first path enters the magnetic shielding cartridge assembly 4 after being polarized by the glan prism, and the other beam of the detection light as a second path is reflected and enters the bottom of the main structure 11 through the sixth light passing hole and the third light passing hole 108.
Details not described in the present specification belong to the prior art known to those skilled in the art: any substitutions and modifications may be made without departing from the spirit and scope of the invention and the appended claims.
Claims (3)
1. A portable spin exchange relaxation-free atomic gyroscope structure, characterized by: the device comprises an alkali metal air chamber fixing seat (1), a non-magnetic electric heating base (2), a magnetic field compensation coil framework (3), a magnetic shielding cylinder (4), a detection laser base (5), a detection light beam splitting assembly (6), a pumping laser base (7), a pumping light beam expanding assembly (8), a pumping light stabilizing assembly (9), a positioning tool (10), a main structure (11) and a supporting base (12); the alkali metal air chamber fixing seat (1) is used for clamping a spherical air chamber filled with alkali metal; the non-magnetic electric heating base (2) is used for clamping the alkali metal air chamber fixing seat (1) and sticking a heating film; the magnetic field compensation coil framework (3) provides an installation reference for the non-magnetic electric heating base (2), and realizes coaxial positioning of a pumping light-transmitting hole of the main structure (11) through shaft hole matching; the magnetic shielding cylinders (4) are of four-layer shielding structures, each layer of shielding cylinder is positioned through a plastic support ring, and finally the overall position fixation is realized through a demagnetizing rod and a positioning tool (10); the detection laser base (5) is suspended and fixed on the main structure (11) through a positioning hole and a screw; the detection light beam splitting assembly (6) fixes the BS and the Glan prism in a connecting mode through the connected mirror bracket and is fastened on the main structure (11) through screws, the detection light is split into two beams by the BS, one beam enters the magnetic shielding cylinder (4) after being deflected through the Glan prism, the other beam is reflected to the bottom of the main structure (11) and enters the magnetic shielding cylinder (4) again after passing through the reflector; the pumping laser base (7) is suspended and fixed on the main structure (11) through a positioning hole and a screw; the pumping light beam expanding assembly (8) is coaxially fixed with the through hole through a screw and is embedded in a reinforcing rib of the main structure (11); the pumping light intensity stabilizing component (9) is fixed by adopting a conjoined spectacle frame, pumping light is divided into two beams by PBS (Poly Butylene succinate), one beam is used for stabilizing light intensity, and the other beam is folded into the bottom of the main structure (11) and is used for stabilizing frequency of saturated absorption of the pumping light; the main structure (11) provides an installation reference for each component of the gyroscope, and each component is positioned through a positioning hole on the main structure (11) and fastened by using a screw; the supporting base (12) provides a stable reference for the whole device;
the main structure (11) adopts a cavity-dividing design combining sinking type and suspension type, separates a pumping light path component, a detection light path component and an electrical plug, positions all the components through positioning holes, fastens all the components on the main structure (11) by using screws, and suspends and fixes part of the components on the main structure (11), thereby effectively reducing the volume of the gyroscope;
the main structure (11) is inserted into a clamping groove of the support base (12) through a protruding part at the bottom and is fastened on the support base through screws, and the main structure (11) is connected with the support base (12) through a heat insulation pad with low heat conductivity.
2. A portable spin-exchange relaxor-free atomic gyroscope structure as claimed in claim 1, wherein: the detection light beam splitting assembly (6) adopts the connected mirror bracket to fix the BS and the Glan prism in a connected mode, the BS is fastened on the main structure (11) through screws, the detection light is split into two beams, one beam of light enters the magnetic shielding cylinder (4) as the first path of detection light after being deflected through the Glan prism, the other beam of light is reflected to enter the bottom of the main structure (11), the light enters the magnetic shielding cylinder (4) as the second path of detection light after being reflected by the reflector installed at the bottom, the second path of detection light is perpendicular to the first path of detection light, and double-axis inertia angular rate measurement is achieved.
3. A portable spin-exchange relaxor-free atomic gyroscope structure as claimed in claim 1, wherein: the pumping light stabilizing light intensity component (9) adopts a connected mirror bracket to integrally fix the PBS and the liquid crystal phase delayer, and is fastened on the main structure (11) by screws, the PBS is used for polarizing the pumping light and divides the pumping light into two beams, one beam of the pumping light enters the magnetic shielding cylinder (4) through the light stabilizing light intensity device and the other beam of the pumping light enters the bottom of the main structure (11), and the pumping light stabilizing light intensity component is used for saturation absorption frequency stabilization after passing through the reflector installed at the bottom.
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| CN201811299014.2A CN109186579B (en) | 2018-11-02 | 2018-11-02 | Portable spin-exchange-relaxation-free atomic gyroscope structure |
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| CN201811299014.2A CN109186579B (en) | 2018-11-02 | 2018-11-02 | Portable spin-exchange-relaxation-free atomic gyroscope structure |
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| CN109186579B true CN109186579B (en) | 2022-04-22 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110631571B (en) * | 2019-09-25 | 2021-05-14 | 北京航空航天大学 | Double-shaft spin-exchange-free relaxation gyroscope and signal detection closed-loop control method |
| CN110631955B (en) * | 2019-10-29 | 2022-01-25 | 之江实验室 | Integrated alkali metal gas density detection device based on Faraday effect |
| CN111609845B (en) * | 2020-05-07 | 2021-10-22 | 北京航空航天大学 | Integrated spin-exchange-free relaxation atomic gyroscope |
| CN111854743B (en) * | 2020-07-16 | 2022-11-25 | 北京航空航天大学 | High-shimming air chamber heating structure |
| CN111624537B (en) * | 2020-07-22 | 2022-11-04 | 北京航空航天大学杭州创新研究院 | Biological cell physical property testing device and testing method thereof |
| CN112414390A (en) * | 2020-11-18 | 2021-02-26 | 北京自动化控制设备研究所 | Micro atomic air chamber packaging device |
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