Triangular cavity for miniaturized high-precision laser gyroscope and laser gyroscope

Abstract

The utility model provides a triangular cavity for a miniaturized high-precision laser gyroscope and the laser gyroscope. The triangular cavity comprises a shell, a wheel mounting hole, a first spherical mirror mounting hole, a second spherical mirror mounting hole, a first anode mounting hole, a second anode mounting hole, a light combination prism mounting hole, a cathode mounting hole and a hollow pipe group, the gyroscope comprises a first anode and a second anode which are respectively arranged in a first anode mounting hole and a second anode mounting hole; the first spherical mirror and the second spherical mirror are respectively arranged in the first spherical mirror mounting hole and the second spherical mirror mounting hole; the first frequency stabilizer and the second frequency stabilizer are arranged adjacent to the first spherical mirror and the second spherical mirror respectively; the cathode is arranged in the cathode mounting hole, and the shaking wheel is arranged in the wheel mounting hole; according to the triangular cavity for the miniaturized high-precision laser gyroscope and the laser gyroscope provided by the utility model, the precision is ensured not to be influenced under the condition that the size is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laser gyroscopes, in particular to a triangular cavity used for a miniaturized high-precision laser gyroscope and the laser gyroscope. Background Art

[0002] The laser gyroscope is a sensor device based on the Sagnac effect for measuring the angular motion of the carrier. It is one of the core components of the inertial navigation system. Compared with other types of gyroscopes such as mechanical gyroscopes, three-float gyroscopes, electrostatic gyroscopes or fiber optic gyroscopes, the laser gyroscope has the advantages of fast startup, high precision, large dynamic range, shock resistance, and high stability. It is currently the most widely used gyroscope.

[0003] The laser gyroscope in the prior art adopts a quadrilateral cavity, which can achieve sufficient gas in the capillary and ample space for component arrangement, thereby achieving higher precision; Publication No. CN215447951U, a four-frequency differential laser gyroscope, discloses a ring resonant cavity and a permanent magnet; the ring resonant cavity includes a cavity, a cathode, a first anode, a second anode, a gain gas chamber, a first reflector, a second reflector, a third reflector and an optical rotation element reflector. The optical rotation element reflector realizes the functions of Faraday rotation and reflection through internal reflection of the glass medium, replacing the two parts of the optical rotation element and the reflector in the traditional four-frequency differential laser gyroscope, and solving the backscattering problem caused by vertical incidence of laser on the optical rotation element.

[0004] However, as the needs of use increase, the laser gyroscope needs to be miniaturized. At the same time, the accuracy optimization of the jitter wheel and the frequency stabilizer needs to be considered during the miniaturization process to ensure that the accuracy during the use phase is not affected. Therefore, it is urgent to design a triangular cavity for miniaturized high-precision laser gyroscopes. Utility Model Content

[0005] The purpose of the utility model is to provide a triangular cavity and a laser gyroscope for miniaturized high-precision laser gyroscope, which can solve the above technical problems;

[0006] The utility model provides a triangular cavity for a miniaturized high-precision laser gyroscope, comprising:

[0007] A housing, wherein a wheel mounting hole for mounting a shaking wheel is provided on the housing;

[0008] The first spherical mirror mounting hole and the second spherical mirror mounting hole are arranged oppositely on two sides of the housing;

[0009] The first anode mounting hole and the second anode mounting hole are arranged oppositely on two sides of the shell;

[0010] The light - combining prism mounting hole and the cathode mounting hole are oppositely arranged on both sides of the housing;

[0011] The hollow tube group is arranged inside the housing, and the first spherical mirror mounting hole, the second spherical mirror mounting hole, the first anode mounting hole, the second anode mounting hole, the light - combining prism mounting hole and the cathode mounting hole are communicated through the hollow tube group.

[0012] Preferably, the housing is formed by chamfering the three corners of a triangular structure.

[0013] As a further technical solution, the first spherical mirror mounting hole, the second spherical mirror mounting hole and the light - combining prism mounting hole are respectively arranged at the chamfered corners of the housing.

[0014] As a further technical solution, the first spherical mirror mounting hole, the second spherical mirror mounting hole and the light - combining prism mounting hole all extend into the housing and are respectively communicated with the hollow tube group.

[0015] As a further technical solution, the first anode mounting hole, the second anode mounting hole and the cathode mounting hole are respectively communicated with the hollow tube group through connecting channels.

[0016] As a further technical solution, the hollow tube group includes:

[0017] The first capillary tube, which is arranged between the light - combining prism mounting hole and the first spherical mirror mounting hole;

[0018] The second capillary tube, which is arranged between the light - combining prism mounting hole and the second spherical mirror mounting hole;

[0019] The third capillary tube, which is arranged between the first spherical mirror mounting hole and the second spherical mirror mounting hole.

[0020] As a further technical solution, the first anode mounting hole, the second anode mounting hole and the cathode mounting hole are respectively communicated with the first capillary tube, the second capillary tube and the third capillary tube through connecting channels.

[0021] As a further technical solution, the wheel mounting hole includes:

[0022] The central hole, which penetrates through the housing;

[0023] A plurality of semi - circular openings, which penetrate through the housing and are equidistantly arranged around the central hole.

[0024] The present utility model also provides a laser gyroscope, which includes a beam combining prism, a first anode, a second anode, a first spherical mirror, a second spherical mirror, a first frequency stabilizer, a second frequency stabilizer, a cathode and a dither wheel; it also includes a triangular cavity for miniaturizing the high-precision laser gyroscope; the first anode and the second anode are respectively arranged in a first anode mounting hole and a second anode mounting hole; the first spherical mirror and the second spherical mirror are respectively arranged in a first spherical mirror mounting hole and a second spherical mirror mounting hole; the first frequency stabilizer and the second frequency stabilizer are respectively arranged adjacent to the first spherical mirror and the second spherical mirror; the cathode is arranged in a cathode mounting hole, and the dither wheel is arranged in a wheel mounting hole.

[0025] The technical solution of the present utility model further reduces the overall size by changing the structure of the housing to achieve overall miniaturization. At the same time, the internal structure of the housing is changed, and a hollow tube group is reasonably arranged in the housing, and the first spherical mirror mounting hole, the second spherical mirror mounting hole, the first anode mounting hole, the second anode mounting hole, the beam combining prism mounting hole and the cathode mounting hole are connected through the hollow tube group to ensure that the light is not affected during use; compared with the prior art, the structure of the internal hollow tube group is changed while the structure of the housing is changed, so that the overall size is reduced without affecting normal use, and at the same time, it is ensured that the gas in the hollow tube group is sufficient, thereby ensuring that the accuracy is not affected while the size is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic structural diagram of a triangular cavity for a miniaturized high-precision laser gyroscope of the present utility model;

[0028] Figure 2 For Figure 1 the bottom view;

[0029] Figure 3 For Figure 1 the side view;

[0030] Figure 4 For Figure 3 the cross-sectional view of the part A-A in

[0031] Figure 5 It is a perspective view of a triangular cavity for a miniaturized high-precision laser gyroscope of the present utility model from an angle;

[0032] Figure 6 This is a three-dimensional view of another angle of a triangular cavity for a miniaturized high-precision laser gyroscope of the present utility model;

[0033] Figure 7 This is a schematic structural diagram of the laser gyroscope in the present utility model.

[0034] Explanation of reference numerals in the drawings:

[0035] 1 - housing; 2 - first spherical mirror mounting hole; 3 - second spherical mirror mounting hole; 4 - first anode mounting hole; 5 - second anode mounting hole; 6 - beam combining prism mounting hole; 7 - cathode mounting hole; 81 - first capillary; 82 - second capillary; 83 - third capillary; 9 - connecting channel; 10 - wheel mounting hole; 101 - central hole; 102 - semi-circular opening; 111 - beam combining prism; 112 - first anode; 113 - second anode; 114 - first spherical mirror; 115 - second spherical mirror; 116 - first frequency stabilizer; 117 - second frequency stabilizer; 118 - cathode; 119 - dither wheel. Specific embodiments

[0036] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0038] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined. In addition, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] As Figure 1-6 shown, a triangular cavity for a miniaturized high-precision laser gyroscope proposed by the present utility model includes:

[0040] a housing 1, and a wheel mounting hole 10 for mounting a dither wheel is formed in the housing 1; it should be noted that, as Figure 1 shown, the housing 1 in the present utility model is formed by chamfering the three corners of a triangular structure; and the center of the wheel mounting hole 10 is located at the intersection of the three center lines of the triangular structure to ensure that the dither wheel is placed at the center of the housing 1 after installation; a first spherical mirror mounting hole 2 and a second spherical mirror mounting hole 3 are oppositely arranged on both sides of the housing 1; a first anode mounting hole 4 and a second anode mounting hole 5 are oppositely arranged on both sides of the housing 1; a beam combining prism mounting hole 6 and a cathode mounting hole 7 are oppositely arranged on both sides of the housing 1; wherein, the first spherical mirror mounting hole 2, the second spherical mirror mounting hole 3 and the beam combining prism mounting hole 6 are respectively arranged at the chamfered corners of the housing 1; specifically, after the housing 1 is chamfered, a plane is formed at the chamfered position; and openings are respectively formed at the three planes to form the first spherical mirror mounting hole 2, the second spherical mirror mounting hole 3 and the beam combining prism mounting hole 6; a hollow tube group is arranged in the housing 1, and the first spherical mirror mounting hole 2, the second spherical mirror mounting hole 3, the first anode mounting hole 4, the second anode mounting hole 5, the beam combining prism mounting hole 6 and the cathode mounting hole 7 are communicated through the hollow tube group;

[0041] As Figure 4As shown, the hollow tube group includes a first capillary tube 81, a second capillary tube 82, and a third capillary tube 83. The first capillary tube 81 is disposed between the combined light prism mounting hole 6 and the first spherical mirror mounting hole 2; the second capillary tube 82 is disposed between the combined light prism mounting hole 6 and the second spherical mirror mounting hole 3; the third capillary tube 83 is disposed between the first spherical mirror mounting hole 2 and the second spherical mirror mounting hole 3. Of course, to better cooperate with the installation of the first capillary tube 81, the second capillary tube 82, and the third capillary tube 83, the first spherical mirror mounting hole 2, the second spherical mirror mounting hole 3, and the combined light prism mounting hole 6 all extend into the housing 1 and are respectively communicated with the hollow tube group.

[0042] In addition, in the present utility model, the first anode mounting hole 4, the second anode mounting hole 5, and the cathode mounting hole 7 are respectively communicated with the hollow tube group through connection channels 9. Specifically, the first anode mounting hole 4, the second anode mounting hole 5, and the cathode mounting hole 7 are respectively communicated with the first capillary tube 81, the second capillary tube 82, and the third capillary tube 83 through the connection channels 9. As Figure 4 shown, the connection channels 9 include a first channel, a second channel, a third channel, and a fourth channel. The first anode mounting hole 4 is communicated with the first capillary tube 81 through the first channel; the second anode mounting hole 5 is communicated with the second capillary tube 82 through the second channel; the cathode mounting hole 7 is communicated with the third capillary tube 83 through the third channel and the fourth channel. Specifically, a section of the third capillary tube 83 connected to the first spherical mirror mounting hole 2 is a first tube section, and a section of the third capillary tube 83 connected to the second spherical mirror mounting hole 3 is a second tube section. The first tube section is communicated with the cathode mounting hole 7 through the third channel, and the second tube section is communicated with the cathode mounting hole 7 through the fourth channel.

[0043] As Figure 1 shown in FIG. 1 or FIG. 2, the wheel mounting hole 10 includes a central hole 101 and a plurality of semi-circular openings 102. The central hole 101 penetrates through the housing 1; the plurality of semi-circular openings 102 penetrate through the housing 1 and are equidistantly arranged around the central hole 101. Specifically, the center of the central hole 101 is located at the intersection of the three center lines of the triangular structure. Among them, the diameter of the central hole 101 needs to be adjusted according to the size of the jitter wheel, and the present utility model does not further limit this. In addition, the number of semi-circular openings 102 is determined according to the structure of the jitter wheel. In the present utility model, three are preferably selected and are equidistantly arranged around the central hole 101.

[0044] The technical solution of the present utility model further reduces the overall size by changing the structure of the housing 1 to achieve overall miniaturization. At the same time, the internal structure of the housing 1 is changed, and a hollow tube group is reasonably arranged in the housing 1, and the communication between the first spherical mirror mounting hole 2, the second spherical mirror mounting hole 3, the first anode mounting hole 4, the second anode mounting hole 5, the light combining prism mounting hole 6 and the cathode mounting hole 7 is realized through the hollow tube group, ensuring that the light is not affected during use; compared with the prior art, while changing the structure of the housing 1, the structure of the internal hollow tube group is also changed, so that the overall size is reduced without affecting normal use, and at the same time, it is ensured that there is sufficient gas in the hollow tube group, thereby ensuring that the accuracy is not affected while the size is reduced.

[0045] As Figure 7 shown, the present utility model also proposes a laser gyroscope, which includes a light combining prism 111, a first anode 112, a second anode 113, a first spherical mirror 114, a second spherical mirror 115, a first frequency stabilizer 116, a second frequency stabilizer 117, a cathode 118 and a dither wheel 119; it also includes a triangular cavity for miniaturizing and high-precision laser gyroscopes; the first anode 112 and the second anode 113 are respectively arranged in the first anode mounting hole 4 and the second anode mounting hole 5; the first spherical mirror 114 and the second spherical mirror 115 are respectively arranged in the first spherical mirror mounting hole 2 and the second spherical mirror mounting hole 3; the first frequency stabilizer 116 and the second frequency stabilizer 117 are respectively arranged adjacent to the first spherical mirror 114 and the second spherical mirror 115, specifically, the first frequency stabilizer 116 and the second frequency stabilizer 117 are respectively arranged on the first spherical mirror 114 and the second spherical mirror 115; the cathode 118 is arranged in the cathode mounting hole 7, and the dither wheel 119 is arranged in the wheel mounting hole 10;

[0046] In the actual use stage, it is necessary to fill the hollow tube group with He-Ne gas; the first anode 112 and the second anode 113 are connected with positive electricity, the cathode 118 is connected with negative electricity, a first light beam is formed between the first anode 112 and the cathode 118, a second light beam is formed between the second anode 113 and the cathode 118, and the first light beam and the second light beam respectively rotate in opposite directions through the first spherical mirror 114 and the second spherical mirror 115 in the hollow tube group, and are combined through the light combining prism 111 to obtain the rotation angular velocity of the carrier through the Sagnac effect.

[0047] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A triangular cavity for a miniaturized high-precision laser gyroscope, characterized in that, Comprising: A housing (1), on which a wheel mounting hole (10) for mounting a dithering wheel is provided; A first spherical mirror mounting hole (2) and a second spherical mirror mounting hole (3) are oppositely arranged on both sides of the housing (1); A first anode mounting hole (4) and a second anode mounting hole (5) are oppositely arranged on both sides of the housing (1); A combined light prism mounting hole (6) and a cathode mounting hole (7) are oppositely arranged on both sides of the housing (1); A hollow tube group is arranged inside the housing (1), and the first spherical mirror mounting hole (2), the second spherical mirror mounting hole (3), the first anode mounting hole (4), the second anode mounting hole (5), the combined light prism mounting hole (6) and the cathode mounting hole (7) are communicated through the hollow tube group.

2. The triangular cavity for a miniaturized high-precision laser gyroscope according to claim 1, characterized in that, The housing (1) is formed by chamfering the three corners of a triangular structure.

3. The triangular cavity for a miniaturized high-precision laser gyroscope according to claim 2, characterized in that, The first spherical mirror mounting hole (2), the second spherical mirror mounting hole (3) and the combined light prism mounting hole (6) are respectively arranged at the chamfered corners of the housing (1).

4. The triangular cavity for a miniaturized high-precision laser gyroscope according to claim 1, characterized in that, The first spherical mirror mounting hole (2), the second spherical mirror mounting hole (3) and the combined light prism mounting hole (6) all extend into the housing (1) and are respectively communicated with the hollow tube group.

5. The triangular cavity for a miniaturized high-precision laser gyroscope according to claim 1, characterized in that, The first anode mounting hole (4), the second anode mounting hole (5) and the cathode mounting hole (7) are respectively communicated with the hollow tube group through connecting channels (9).

6. The triangular cavity for a miniaturized high-precision laser gyroscope according to claim 5, wherein The hollow tube group includes: A first capillary tube (81) arranged between the combined light prism mounting hole (6) and the first spherical mirror mounting hole (2); A second capillary tube (82) arranged between the combined light prism mounting hole (6) and the second spherical mirror mounting hole (3); A third capillary tube (83) arranged between the first spherical mirror mounting hole (2) and the second spherical mirror mounting hole (3).

7. The triangular cavity for a miniaturized high-precision laser gyroscope according to claim 6, characterized in that, The first anode mounting hole (4), the second anode mounting hole (5) and the cathode mounting hole (7) are respectively communicated with the first capillary tube (81), the second capillary tube (82) and the third capillary tube (83) through connecting channels (9).

8. The triangular cavity for a miniaturized high-precision laser gyroscope according to claim 1, wherein The wheel mounting hole (10) includes: A central hole (101) penetrating through the housing (1); A plurality of semi-circular openings (102) penetrating through the housing (1) and equally spaced around the central hole (101).

9. A laser gyroscope, comprising a beam-combining prism (111), a first anode (112), a second anode (113), a first spherical mirror (114), a second spherical mirror (115), a first frequency stabilizer (116), a second frequency stabilizer (117), a cathode (118) and a dither wheel (119); characterized in that It also includes a triangular cavity for a miniaturized high-precision laser gyroscope as described in any one of claims 1-8; the first anode (112) and the second anode (113) are respectively arranged in the first anode mounting hole (4) and the second anode mounting hole (5); the first spherical mirror (114) and the second spherical mirror (115) are respectively arranged in the first spherical mirror mounting hole (2) and the second spherical mirror mounting hole (3); the first frequency stabilizer (116) and the second frequency stabilizer (117) are respectively arranged adjacent to the first spherical mirror (114) and the second spherical mirror (115); the cathode (118) is arranged in the cathode mounting hole (7), and the dithering wheel (119) is arranged in the wheel mounting hole (10).

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