Shielding device for an atomic gyroscope, gyroscope having a shielding device, and production method

Abstract

The invention relates to a shielding device (10) for positionally accurately receiving a gas cell of an atomic gyrometer, comprising a support frame (12) having a first support plate (14) and a second support plate (16), a shielding body (22) designed for receiving the gas cell and two compensating rings (24) designed for arranging the shielding body (22) on the support frame (12); wherein the shielding body (22) comprises a magnetically soft nickel–iron alloy for magnetically shielding the gas cell and is situated between the support plates (14, 16) of the support frame (12); wherein the compensating rings (24) each have a retaining collar (26) for arrangement on the shielding body (22) and a fastening collar (28) for fastening the retaining collar (26) in each case on one of the support plates (14, 16) of the support frame (12); wherein the compensating rings (24) are designed for reducing mechanical oscillation and thermal stresses on the shielding body (22). The invention also relates to an atomic gyroscope and to a production method (70).

Description

[0001] Shielding device for an atomic gyroscope, gyroscope with a shielding device and manufacturing method

[0002] Background of the invention

[0003] The invention relates to a shielding device for a gas cell of an atomic gyroscope. The invention also relates to an atomic gyroscope. The invention further relates to a manufacturing method for producing a shielding device.

[0004] Atomic gyroscopes are known from the state of the art, for example, from DE 10 2021 204 483 Al. In addition to their well-known applications in road traffic and shipping, they are also commonly used in aerospace due to their high accuracy. The latter applications place particularly high demands on weight and robust construction.

[0005] To meet these demanding requirements, typical gyroscopes incorporate a shielding system for the gas cell, designed to reduce or completely eliminate magnetic and mechanical interference. The gas cell is often shielded by a potting compound. However, such shielding systems are quite heavy, resulting in significant costs, especially for use in aerospace applications.

[0006] Furthermore, gyroscopes, especially those used in aerospace applications, are exposed to significant temperature changes. Such temperature changes cause significantly different thermal expansions of the components, which leads to thermally induced stresses and the associated inaccuracies of the gyroscope.

[0007] Furthermore, gyroscopes must be adjusted after being mounted on a carrier device, such as an aircraft and / or a satellite, because the installation process introduces mechanical stresses into the gyroscope, reducing its precision. This creates additional complexity.

[0008] Object of the invention

[0009] It is an object of the invention to increase the thermal and mechanical load capacity of an atomic gyroscope while reducing the weight and to simplify the arrangement on a carrier device.

[0010] Description of the invention

[0011] This object is achieved according to the invention by a shielding device having the features of patent claim 1. The object is also achieved by a gyroscope having the features of patent claim 11. The object is further achieved by a manufacturing method having the features of patent claim 12. The subclaims give preferred embodiments of the invention.

[0012] According to the invention, a shielding device is provided. The shielding device is suitable and designed for shielding against magnetic, thermal, and mechanical interference. The shielding device is designed for the positionally accurate reception and alignment of a gas cell of an atomic gyrometer.

[0013] The shielding device has a support frame. The support frame comprises a first support plate and a second support plate. The support plates are preferably arranged parallel to one another. More preferably, the support plates, in particular the entire support frame, are made of aluminum. This allows thermally induced stresses, which occur, for example, in the case of large temperature differences, to be reduced.

[0014] The shielding device further comprises a shielding body. The shielding body is designed to accommodate the gas cell. Typically, the shielding body at least partially encloses the gas cell. Preferably, the shielding body essentially completely encloses the gas cell. Complete enclosing increases the shielding efficiency of the shielding body or the shielding device.

[0015] The shielding body is typically arranged between the support plates of the support frame. The shielding device typically comprises two compensating rings designed for arranging, in particular fastening, the shielding body to the support frame. Preferably, the shielding body is arranged or fastened to each of the support plates with a respective compensating ring. The compensating rings preferably have a predetermined spring stiffness and damping, which enables low-vibration mounting of the shielding body.

[0016] The shielding body comprises a soft-magnetic nickel-iron alloy, in particular a mu-metal, for magnetic shielding of the gas cell. The shielding body is preferably formed or manufactured from the soft-magnetic nickel-iron alloy. Soft-magnetic nickel-iron alloys have proven particularly effective in terms of magnetic shielding.

[0017] According to the invention, the compensating rings each have a retaining ring for arrangement on the shielding body and a fastening ring for fastening the retaining ring to one of the support plates of the support frame. This allows mechanical stresses and / or vibrations and / or thermal stresses to be reliably reduced, in particular completely compensated. Preferably, the fastening ring of a compensating ring is made at least partially of aluminum. Particularly preferably, the retaining ring is made of aluminum. This allows the compensating ring to be particularly lightweight and thermal stresses to be reduced.

[0018] Preferably, the retaining ring of a compensating ring is made at least partially of stainless steel. Particularly preferably, the retaining ring is made of stainless steel. This allows for a particularly secure mechanical connection between the shielding body and the compensating ring.

[0019] In summary, the invention proposes a device for shielding a gas cell of an atomic gyroscope. A shielding body enclosing the gas cell is arranged on a robust support frame in a mechanically stress-free and thus positionally stable manner. By supporting the shielding body on the compensation rings, mechanical and thermal stresses can be reduced or completely compensated. The shielding device can thus be pre-adjusted and arranged in a support device. Subsequent adjustment due to external interference can be dispensed with.

[0020] In a preferred embodiment of the shielding device, the shielding body has a first shielding shell and a second shielding shell. The first and second shielding shells comprise a soft-magnetic nickel-iron alloy, in particular a mu-metal. Preferably, the first and / or second shielding shell is formed from the soft-magnetic nickel-iron alloy. The second shielding shell is arranged within the first shielding shell. In other words, the second shielding shell is at least partially, in particular completely, enclosed by the first shielding shell. Furthermore, the second shielding shell is arranged at a distance from the first shielding shell by two or more shell spacers. This allows a shielding cavity to be formed between the first shielding shell and the second shielding shell. A shielding cavity increases the shielding of the shielding body without an increase in weight due to an increase in the wall thickness of the shielding shells.

[0021] Typically, each shielding sleeve has a wall thickness of at least 0.5 millimeters, preferably at least 0.75 millimeters, particularly preferably at least 1.0 millimeters. Further typically, each shielding sleeve has a wall thickness of at most 2 millimeters, preferably at most 1.5 millimeters, particularly preferably at most 1.25 millimeters. This allows for particularly high shielding while simultaneously keeping the weight of the shielding body low.

[0022] A preferred development of the shielding device is one in which the shielding body has at least one further shielding shell. The further shielding shell comprises the nickel-iron alloy, in particular the Mu-metal, or is formed therefrom. The at least one further shielding shell is arranged within the second shielding shell. In other words, the second shielding shell encloses the further shielding shell at least partially, in particular completely. Furthermore, the further shielding shell is arranged at a distance from the second shielding shell by two or more shell spacers. This allows an additional shielding cavity to be formed between the second shielding shell and the further shielding shell, and the shielding can be further increased.

[0023] In a preferred development of the shielding device, the sheath spacers arranged between the first shielding sheath and the second shielding sheath extend through the first shielding sheath and / or the second shielding sheath. This allows the sheath spacers to be attached to the shielding sheaths and / or the shielding sheaths to be attached to one another using simple technical means and in particular without additional heat input, for example by thermal welding. This minimizes thermal distortion of the shielding body during production. In a particularly preferred development of the shielding device, the sheath spacers arranged between the second shielding sheath and the further shielding sheath are attached to the sheath spacers arranged between the first shielding sheath and the second shielding sheath.This allows the shielding sheaths to be secured by interlocking the sheath spacers.

[0024] In a preferred embodiment of the shielding device, the shielding body, in particular the shielding sleeves, are designed to be openable to accommodate the gas cell. In other words, the shielding body or the shielding sleeves are designed to be non-destructively opened and closed. Preferably, the shielding body and / or the shielding sleeves have a body section and a cover section, with the body section forming a plug-in connection with the cover section.

[0025] A preferred embodiment of the shielding device is one in which the shielding body or the first shielding shell is cylindrical. Preferably, the second, and in particular each additional, shielding shell is cylindrical. This allows a particularly large internal volume to be shielded by a small shielding surface, ensuring simple arrangement of the shielding body on the support frame.

[0026] A preferred embodiment of the shielding device is one in which the shielding body has at least one circumferential centering phase on an outer side. Typically, the centering phase is formed on the outer surface of the cylindrically shaped shielding body. As a result, the compensating ring for arranging the shielding body on the support frame can be arranged, in particular fastened, on the at least one centering phase. This enables the repeatable and precise arrangement of the shielding body on the support frame. A preferred embodiment of the shielding device is one in which the shielding body is cylindrical and has two opposite and parallel enveloping surfaces. The embodiment provides that at least one of the compensating rings is arranged, in particular immovably, on at least one of the enveloping surfaces.Typically, the retaining ring of the compensating ring is attached, particularly welded, to the envelope surface. This allows a functional unit, or rather a manufacturing assembly, consisting of the shielding body and retaining ring to be formed. This ensures tight manufacturing tolerances.

[0027] In a further development of the shielding device, the retaining ring is designed as a solid-state joint to compensate for mechanical and thermal stresses in the shielding body. In other words, the retaining ring is designed to accommodate length changes resulting from vibrations or temperature changes without changing the position of the fastening ring on the compensation ring. This allows mechanical stresses on the support frame to be reduced or compensated.

[0028] The underlying problem is also solved by an atomic gyroscope. The gyroscope has the shielding device described above and below and a gas cell arranged in the shielding device.

[0029] Furthermore, the underlying problem is solved by a manufacturing process.

[0030] The manufacturing method is designed to produce a shielding device as described above and below. The manufacturing method comprises at least the following process steps:

[0031] In one step of the manufacturing process, a first shielding cover and a second shielding cover are provided. Preferably, at least one further shielding cover can be provided.

[0032] A further step of the manufacturing process involves forming the shielding body by arranging sheath spacers between the shielding sheaths. The sheath spacers can be arranged on the shielding sheaths, for example, by welding and / or screwing.

[0033] One step of the manufacturing process involves arranging the shielding body on the support frame. Typically, at least one compensating ring is attached, in particular screwed, to one of the support plates of the support frame.

[0034] The manufacturing process may provide for at least one retaining ring of a compensating ring to be attached to the shielding body. Alternatively or additionally, the manufacturing process may provide for a fastening ring of the compensating ring to be attached to one of the support plates.

[0035] The manufacturing method preferably provides for the formation of a manufacturing arrangement as described above and below, wherein the retaining ring is arranged, preferably attached, to the shielding body, in particular the first shielding shell. Typically, the shielding body is then stress-relieved together with the retaining ring. This allows the shielding body to be manufactured with particularly low stress.

[0036] Particularly preferably, the retaining ring arranged on the shielding body is manufactured, in particular ground, to a final dimension after the shielding body has been annealed. This ensures a particularly low manufacturing tolerance.

[0037] Further advantages of the invention will become apparent from the description and the drawings. Likewise, the above-mentioned and further-described features can be used individually or in combination in any desired manner. The embodiments shown and described are not intended to be exhaustive, but rather are exemplary in nature for describing the invention.

[0038] Detailed description of the invention and drawing

[0039] Fig. 1 shows a first embodiment of a shielding device with a support frame and a shielding body arranged on the support frame via compensating rings in a perspective view.

[0040] Fig. 2 shows the shielding device from Fig. 1 in a sectional view.

[0041] Fig. 3 shows a retaining ring of a compensating ring according to the preceding Figs. 1 and 2 in a profile view.

[0042] Fig. 4 shows another embodiment of a shielding device in a sectional view.

[0043] Fig. 5 shows a manufacturing arrangement with a shielding body and a holding ring arranged on the shielding body in a sectional view.

[0044] Fig. 6 shows schematically a manufacturing method according to the invention for producing a shielding device.

[0045] Fig. 1 shows a shielding device 10. The shielding device 10 is particularly suitable for the positionally accurate reception of a gas cell (not shown) of an atomic gyroscope (not shown).

[0046] The shielding device 10 has a support frame 12 with a first support plate 14 and a second support plate 16. The support plates 14, 16 can, as shown, be rectangular, in particular square. Typically, the support plates 14, 16 are arranged parallel to one another. The support frame 12 can comprise one, here two, support plate spacers 18. The support plate spacers 18 are typically designed to form and / or adjust a predetermined distance 20 between the support plates 14, 16. The support plate spacers 18 can be fastened to the support plates 14, 16, for example, by screwing. Furthermore, the support plate spacers 18 can be welded to the support plates 14, 16. As shown, the support plate spacers 18 are frame-like and rectangular.In other words, the support frame 12 can be substantially cuboid-shaped, in particular cubic, by means of the support plates 14, 16 and the support plate spacers 18. This simplifies the arrangement of the shielding device 10 on a support device (not shown in detail).

[0047] The shielding device 10 also has a shielding body 22. Typically, the shielding body 22 is designed to internally accommodate the gas cell of the gyroscope. Typically, the shielding body 22 is suitable and designed for magnetic shielding of the gas cell accommodated in the shielding body 22. Magnetic shielding can be understood as the at least partial, in particular complete, penetration of magnetic field lines (not shown) into the shielding body 22. The shielding body is preferably designed to shield low-frequency magnetic fields (not shown).

[0048] According to the invention, the shielding body 22 comprises a soft-magnetic nickel-iron alloy for magnetically shielding the gas cell. Preferably, the shielding body 22 is formed partially or entirely from the soft-magnetic nickel-iron alloy.

[0049] As shown, the shielding device comprises two compensating rings 24 designed for arranging the shielding body 22 on the support frame 12, of which only one compensating ring 24 is visible due to the perspective view of the shielding body 10 in Fig. 1. The compensating rings 24 are designed to hold the shielding body 22 in its correct position on the support frame 12. The compensating rings are designed to shield the support frame 12 from thermal and / or mechanical stresses in the shielding body 22. In other words, mechanical changes in the length of the shielding body 22 can be compensated for by the compensating rings 24. Thermally induced stresses or mechanical distortion of the shielding body 22 and / or the entire shielding device can thereby be reliably reduced or completely prevented. The support frame 12 thus ensures the correct position of the shielding body 22 or the gas cell.This can improve the accuracy of the gyroscope.

[0050] Furthermore, the compensating rings 24 can be designed to absorb and / or compensate for mechanical vibrations. This can, for example, reduce and / or compensate for vibrations and impacts of the support frame 12, thereby preventing damage to the shielding body 22 and / or the gas cell.

[0051] Fig. 2 shows the shielding device 10 from Fig. 1 in a sectional view.

[0052] According to the invention, each of the compensating rings 24 has a retaining ring 26 for arrangement on the shielding body 22 and a fastening ring 28 for fastening the respective retaining ring 26 to one of the support plates 14, 16 of the support frame 12. In other words, each compensating ring 24 is formed in at least two parts. Preferably, when a compensating ring 24 is fastened, the respective support plate 14, 16 is arranged between the retaining ring 26 and the fastening ring 28. This can achieve high surface pressure and reduce mechanical stress peaks. For reasons of clarity, only one compensating ring 24, one retaining ring 26, and one fastening ring 28 are provided with a reference numeral. As shown, the fastening ring 28 can be fastened to the support frame 12 or to the respective support plate 14, 16 by means of several screws 30.Preferably, the retaining ring 26 is attached to the support plate 14, 16 by means of the same screws 30. This eliminates the need for additional screws or fastening devices.

[0053] Preferably, the fastening ring 28 is fastened to the support frame 12 or the support plates 14, 16 by means of several, in particular a plurality of, screws 30. The screws 30 are preferably arranged at equal spacing from one another around the circumference of the compensating ring 24. This allows the surface pressure to be further improved.

[0054] As shown, the shielding body 22 has a first shielding shell 32 and a second shielding shell 34. Furthermore, according to the illustrated embodiment, the shielding body 22 comprises a further shielding shell 36. The shielding shells 32, 34, 36 preferably comprise the soft-magnetic nickel-iron alloy or are formed from the soft-magnetic nickel-iron alloy. Particularly preferably, the shielding shells 32, 34, 36 are formed partially or entirely from Mu-metal.

[0055] The second shielding shell 34 can be arranged within the first shielding shell 32. In other words, the first shielding shell 32 can at least partially, in particular completely, surround the second shielding shell 34.

[0056] The additional shielding cover 36 can, as shown, be arranged within the second shielding cover 34. In other words, the additional shielding cover 36 can be at least partially, in particular completely, surrounded by the second shielding cover 34.

[0057] The shielding body 22 or the shielding sleeves 32, 34, 36 can be hollow-cylindrical and / or barrel-shaped. This allows for particularly efficient shielding of the volume containing the gas cell while using minimal material for the shielding.

[0058] The shielding covers 32, 34, 36 are arranged at a distance from one another. As shown, the first shielding cover 32 is spaced from the second shielding cover 34 by a plurality of cover spacers 38. Furthermore, the further shielding cover 36 is spaced from the second shielding cover 34 by a plurality of cover spacers 38. For reasons of clarity, only one cover spacer 38 is provided with a reference symbol.

[0059] The sheath spacers 38 can be distributed evenly over the circumference of the sheath surfaces 32, 34, 36, in particular over the sheath surfaces 40 of the shielding sheaths 32, 34, 36 facing the support plates 14, 16. In a particular embodiment, all sheath spacers 38 are arranged on the sheath surfaces 40. In other words, with a cylindrical design of the shielding sheaths 32, 34, 36, no sheath spacers 38 are arranged on the lateral surfaces of the shielding sheaths 32, 34, 36. This allows for the use of particularly simple fastening means.

[0060] The sheath spacers 38 form shielding cavities 42 between the shielding sheaths 32, 34, 36. The shielding cavities 40 are typically filled with a thermally and / or magnetically insulating medium, preferably gas, particularly preferably air. This can further improve the shielding effect of the shielding body 22.

[0061] The sheath spacers 38 can be configured to secure the shielding sheaths 32, 34, 36 to one another. As shown, the sheath spacers 38 can have internal threads 44 and / or external threads 46 for arranging additional sheath spacers 38, screws 48, and / or nuts 50. For clarity, only an internal thread 44, an external thread 46, a screw 48, and a nut 50 of a sheath spacer 38 are provided with a reference symbol. As shown, the sheath spacers 38 arranged between the first shielding sheath 32 and the second shielding sheath 34 penetrate the second shielding sheath 34 at least with the respective external thread 46. The sheath spacers 38 arranged between the second shielding sheath 34 and the further shielding sheath 36 are fastened by means of their internal thread 44 to the external thread 46 penetrating the second shielding sheath 34.The first shielding sheath 32 is fastened by means of screws 48 to the respective internal threads 44 of the sheath spacers 38 arranged between the first shielding sheath 32 and the second shielding sheath 34. The further shielding sheath 36 is fastened by means of nuts 50 to the external threads 46 extending through the further shielding sheath 36. This allows the shielding body 22 to be mounted serially and flexibly expanded with additional shielding sheaths 36.

[0062] The shielding body 22 or the shielding sleeves 32, 34, 36 can be designed to be openable. This allows the gas cell to be arranged inside the shielding body 22 and simplifies the assembly of the shielding body 22.

[0063] As shown, the shielding covers 32, 34, 36 can be constructed in multiple parts, with the shielding covers 32, 34, 36 preferably each having a cylindrical body section 52 and a cylindrical cover section 54. Typically, the body section 52 and the cover section 54 are designed to be arranged next to one another, in particular to be inserted into one another. For secure fixing of the respective body section 52 to the associated cover section 54, fixing screws 56 can be provided, as shown. This ensures damage-free opening of the shielding body 22. For reasons of clarity, only one body section 52, one cover section 54, and one fixing screw 56 are provided with a reference symbol.

[0064] The respective enveloping surfaces 40 of the shielding shells 32, 34, 36 are typically configured parallel to one another. As shown, the compensating rings 24, or the respective retaining ring 26 of a compensating ring 24, are arranged on one of the enveloping surfaces 40 of the first shielding shell 32. The retaining rings 26 can be movably arranged on the first shielding shell 32. Preferably, at least one retaining ring 26 is fastened, in particular welded, to the first shielding shell 32. This allows the shielding body 22 to be arranged even more precisely on the support frame 12.

[0065] According to the embodiment shown in Fig. 2, the retaining ring 26 is designed as a solid-state joint. This allows for particularly reliable compensation of mechanical and thermal stresses on the shielding body 22.

[0066] Fig. 3 shows a profile view of the retaining ring 26 from Fig. 2.

[0067] The retaining ring 26 has a hook-shaped profile with a fastening section 58 and a hook section 60. The fastening section 58 is designed to fasten the retaining ring 26 to the support frame 12 (see Figs. 1, 2) or the support plates 14, 16 (see Figs. 1, 2).

[0068] The hook portion 60 has a reduced material thickness 62 compared to the fastening portion 58. This enables a resilient relative movement of the hook portion 60 to the fastening portion 58 around the hinge point 64. This allows compensation for thermal and / or mechanical expansion of the shielding body 22 (see Figs. 1, 2).

[0069] Fig. 4 shows a further embodiment of a shielding device 10 with a support frame 12 and a shielding body 22.

[0070] The support frame 12 has support plates 14, 16 arranged parallel to one another on opposite sides of the shielding body 22. The shielding body 22 has several, here three, shielding sleeves 32, 34, 36, which are spaced apart from one another by sleeve spacers 38. The shielding body 22, or the additional shielding sleeve 36, is designed to accommodate a gas cell (not shown) of a gyroscope (not shown). As shown, the gas cell can be secured within the shielding body 22 by means of gas cell holders 65 projecting into the shielding body 22.

[0071] The embodiment of the shielding device 10 shown in Fig. 4 differs essentially from the shielding device 10 known from Figs. 1 and 2 in that the shielding body 22 has a centering phase 66 for applying the retaining ring 26. In other words, the shielding body 22 can be centered or centrally aligned within the compensating ring 24 when the round retaining ring 26 is applied to the conical centering phase 66. This enables a particularly accurate and repeatable arrangement of the shielding body 22.

[0072] The retaining ring 26 can be movably arranged on the centering phase 66. Preferably, the retaining ring 26 is attached to the shielding body 22, in particular welded.

[0073] Particularly preferably, the second shielding sheath 34 and the further shielding sheath 36 also have a phase 66 in addition to the first shielding sheath 32. This allows the distances formed by the sheath spacers 38 between the shielding sheaths 32, 34, 36, or the shielding cavities 42, to be maintained uniformly, thereby promoting shielding.

[0074] Fig. 5 shows a manufacturing arrangement 68 with a further embodiment of the shielding body 22 and a retaining ring 26 arranged on the shielding body 22 in a sectional partial view. The shielding body 22 has a first shielding shell 32, a second shielding shell 34 arranged within the first shielding shell 32, and a further shielding shell 36 arranged within the second shielding shell 34.

[0075] The embodiment of the shielding body 22 differs from the previous embodiments in that the sheath spacers 38 are permanently attached to the shielding sheaths 32, 34, 36. Preferably, the sheath spacers 38 are welded to the shielding sheaths 32, 34, 36. This allows the shielding body 22 to be constructed in a particularly cost-effective and robust manner.

[0076] Fig. 6 shows a manufacturing method 70 according to the invention for producing a shielding device 10 described above and below (see Figs. 1, 2, 4).

[0077] The manufacturing process 70 comprises at least the following process steps:

[0078] In a method step 72 of the manufacturing method 70, a first shielding cover 32 (see Figs. 1, 2, 4, 5) and a second shielding cover 34 (see Figs. 1, 2, 4, 5) are provided. Preferably, at least one further shielding cover 36 (see Figs. 1, 2, 4, 5) can be provided.

[0079] A further method step 74 of the manufacturing method 70 provides for the formation of the shielding body 22 (see Figs. 1, 2, 4, 5) by arranging sheath spacers 38 (see Figs. 2, 4, 5) between the shielding sheaths 32, 34, 36. The sheath spacers 38 can be arranged on the shielding sheaths 32, 34, 36, for example, by welding and / or screwing.

[0080] A method step 76 of the manufacturing method 70 provides for the arrangement of the shielding body 22 on the support frame 12 (see Figs. 1, 2, 4, 5). Typically, at least one compensating ring 24 is attached, in particular screwed, to one of the support plates 14, 16 (see Figs. 1, 2, 4, 5) of the support frame 12.

[0081] In the manufacturing process 70, it can be provided that at least one retaining ring 26 (see Figs. 2, 4) of a compensating ring 24 is fastened to the shielding body 22. Alternatively or additionally, the manufacturing process 70 can provide that a fastening ring 28 (see Figs. 2, 4) of the compensating ring 24 is fastened to one of the support plates 14, 16.

[0082] The manufacturing method 70 preferably provides for the formation of a manufacturing arrangement 68 (see Fig. 5), described above and below, wherein the retaining ring 26 is arranged, preferably attached, to the shielding body 22, in particular the first shielding shell 32. Typically, the shielding body 22 is then stress-relieved together with the retaining ring 26. This allows the shielding body 22 to be manufactured with particularly low stress.

[0083] Particularly preferably, the retaining ring 26 arranged on the shielding body 22 is manufactured, in particular ground, to a final dimension after the shielding body 22 has been annealed. This ensures a particularly low manufacturing tolerance.

[0084] List of reference symbols

[0085] 10 shielding device; 20 46 external thread;

[0086] 12 support frames; 48 screws;

[0087] 14 first support plate; 50 nut; 16 second support plate; 52 fuselage section;

[0088] 18 support plate spacers; 54 deck section;

[0089] 20 predetermined distance; 25 56 fixation screw;

[0090] 22 shielding body; 58 fastening section;

[0091] 24 compensation ring; 60 hook section; 26 retaining ring; 62 material thickness;

[0092] 28 fastening ring; 64 hinge point;

[0093] 30 screw; 30 65 gas cell holder;

[0094] 32 first shielding shell; 66 centering phase;

[0095] 34 second shielding cover; 68 manufacturing arrangement; 36 further shielding cover; 70 manufacturing process;

[0096] 38 shell spacers; 72 process steps;

[0097] 40 envelope area; 35 74 process step;

[0098] 42 shielding cavity; 76 process steps.

[0099] 44 internal threads;

Claims

Patent claims 1. A shielding device (10) for the positionally accurate reception of a gas cell of an atomic gyrometer, comprising a support frame (12) with a first support plate (14) and a second support plate (16), a shielding body (22) designed to receive the gas cell, and two compensating rings (24) designed to arrange the shielding body (22) on the support frame (12); wherein the shielding body (22) comprises a soft-magnetic nickel-iron alloy for magnetically shielding the gas cell and is arranged between the support plates (14, 16) of the support frame (12); wherein the compensating rings (24) each have a holding ring (26) for arrangement on the shielding body (22) and a fastening ring (28) for fastening the holding ring (26) to one of the support plates (14, 16) of the support frame (12); wherein the compensating rings (24) are designed to reduce mechanical vibrations and thermal stresses of the shielding body (22).

2. Shielding device (10) according to claim 1 or 2, wherein the shielding body (22) comprises a first shielding shell (32) and a second shielding shell (34) made of a soft-magnetic nickel-iron alloy, in particular of a mu-metal; wherein the second shielding shell (34) is arranged within the first shielding shell (32) at a distance from the first shielding shell (32) by two or more shell spacers (38).

3. Shielding device (10) according to claim 2, wherein the shielding body (22) has at least one further shielding cover (36), wherein the at least one further shielding cover (36) is arranged within the second shielding cover (34) is arranged at a distance from the second shielding sheath (34) by two or more sheath spacers (38).

4. Shielding device (10) according to claim 2 or 3, wherein the sheath spacers (38) arranged between the first shielding sheath (32) and the second shielding sheath (34) pass through the first shielding sheath (32) or the second shielding sheath (34).

5. Shielding device (10) according to claim 4, wherein the sheath spacers (38) arranged between the second shielding sheath (34) and the further shielding sheath (36) are fastened to the sheath spacers (38) arranged between the first shielding sheath (32) and the second shielding sheath (34).

6. Shielding device (10) according to one of the preceding claims, wherein the shielding body (22), in particular the shielding sleeves (32, 34, 36) are designed to be openable to accommodate the gas cell.

7. Shielding device (10) according to one of the preceding claims, wherein the shielding body (22) is cylindrical.

8. Shielding device (10) according to claim 7, wherein the shielding body (22) has at least one circumferential centering phase (66) on an outer side; wherein at least one of the compensating rings (24) is arranged, in particular fastened, on the at least one centering phase (66).

9. Shielding device (10) according to one of claims 1 to 7, wherein the shielding body (22) is cylindrical and has two opposing and parallel enveloping surfaces (40); wherein at least one of the compensating rings (24) is arranged, in particular immovably, on at least one of the enveloping surfaces (40).

10. Shielding device (10) according to claim 9, wherein at least one retaining ring (26) is designed as a solid-state joint for compensating mechanical and thermal stresses of the shielding body (22).

11. An atomic gyroscope comprising a shielding device (10) according to any one of the preceding claims and a gas cell arranged in the shielding device (10).

12. Manufacturing method (70) for producing a shielding device (10) according to one of claims 1 to 10, comprising the method steps: a) providing a first shielding shell (32) and a second shielding shell (34); b) forming the shielding body (22) by arranging shell spacers (38) between the shielding shells (32, 34, 36); c) arranging the shielding body (22) on the support frame (12), wherein at least one compensating ring (24) is fastened to a support plate (14, 16) of the support frame (12).

13. Manufacturing method (70) according to claim 12, wherein at least one holding ring (26) of a compensating ring (24) is fastened to the shielding body (22) and at least one fastening ring (28) of the compensating ring (24) is fastened to at least one of the support plates (14, 16).

14. Manufacturing method (70) according to claim 13, wherein the shielding body (22) is stress-relieved together with the retaining ring (26).

15. Manufacturing method (70) according to claim 14, wherein the retaining ring (26) is manufactured to a final dimension after annealing.

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