Jitter wheel for miniaturized high-precision laser gyroscope and laser gyroscope

Abstract

The utility model provides a dithering wheel for a miniaturized high-precision laser gyroscope and the laser gyroscope. The shaking wheel comprises a first wheel body and a second wheel body, and the second wheel body is arranged on the first wheel body; the support is arranged on the second wheel body; the first feedback body is used for transmitting integrally generated shake to the support and is arranged on the second wheel body; the second feedback body is used for acquiring the jitter frequency of the cavity and is arranged on the first wheel body; the gyroscope comprises a cavity and an optical processing assembly, the dithering wheel is used for miniaturizing the high-precision laser gyroscope; the first wheel body is arranged on the cavity in a penetrating mode. The jittering wheel for the miniaturized high-precision laser gyroscope and the laser gyroscope provided by the utility model are simple and reasonable in structure, can accurately obtain and transmit jittering conditions, and can better control the cavity.

Description

Technical Field

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

[0002] The laser gyroscope is a sensing device based on the Sagnac effect used to measure the angular motion of a carrier. It is one of the core components of an inertial navigation system. Compared with other types of gyroscopes, such as mechanical gyroscopes, three-float gyroscopes, electrostatic gyroscopes, and fiber optic gyroscopes, it 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] Publication No. CN215447951U, titled "A Quad-Frequency Differential Laser Gyro," discloses a ring resonator and permanent magnets. The ring resonator comprises 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 rotator reflector. The optical rotator reflector simultaneously achieves Faraday rotation and reflection through internal reflection in a glass medium, replacing both the optical rotator and the reflector in conventional quad-frequency differential laser gyros and resolving the backscattering problem caused by vertical laser incidence on the optical rotator.

[0004] However, the laser gyroscopes disclosed in the prior art are relatively large in size. As the requirements increase, the laser gyroscopes need to be miniaturized as much as possible while ensuring accuracy. Although some laser gyroscopes in the prior art achieve overall miniaturization by changing the shape of the cavity, a dither wheel structure is adopted after the structural change, and the accuracy of the dither wheel directly affects the accuracy of the laser gyroscope. Due to structural limitations, the dither wheel in the prior art cannot accurately obtain the dithering conditions of the cavity during application, which affects the accuracy of the laser gyroscope. Therefore, there is an urgent need to design a dither wheel for miniaturized high-precision laser gyroscopes. Utility Model Content

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

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

[0007] A first wheel body and a second wheel body, wherein the second wheel body is arranged on the first wheel body;

[0008] A support, arranged on the second wheel body;

[0009] a first feedback body for transmitting the vibration generated by the whole to the support, and disposed on the second wheel body;

[0010] The second feedback body for obtaining the dithering frequency of the cavity is arranged on the first wheel body.

[0011] As a further technical solution, the first wheel body includes:

[0012] The wheel frame and the wheel plate are arranged on the periphery of the wheel frame.

[0013] As a further technical solution, the wheel frame includes three first plates, and the angles between adjacent first plates are the same; wheel plates are provided on each of the three first plates.

[0014] As a further technical solution, the second wheel body includes three second plates, and the three second plates are respectively arranged between adjacent first plates.

[0015] Preferably, there are three supports, which are respectively arranged on the three second plates.

[0016] As a further technical solution, the diameter of the circle around the peripheries of the three second plates is greater than the diameter of the circle around the peripheries of the three first plates.

[0017] As a further technical solution, the first feedback bodies are relatively arranged on both sides of the second plate body; and the first feedback bodies are all arranged on the three second plate bodies.

[0018] As a further technical solution, the second feedback body is arranged on one side of the first plate body; and the second feedback body is arranged on each of the three first plates.

[0019] As a further technical solution, the first wheel body, the second wheel body and the support are integrally formed.

[0020] The utility model also proposes a laser gyroscope, comprising a cavity and a light processing component; and also comprising a shaking wheel for a miniaturized high-precision laser gyroscope; wherein the first wheel body is arranged on the cavity.

[0021] The technical solution of the present invention is that the first wheel body, the second wheel body and the support are combined and placed in the cavity. During the use stage, the piezoelectric effect of the first feedback body is driven by the second wheel body, and the overall generated vibration is transmitted to the cavity through the support. The second feedback body on the first wheel body obtains the vibration frequency of the cavity and then provides feedback to maintain the vibration frequency of the cavity at a set value. Compared with the existing technology, the technical solution of the present invention has a simple and reasonable structure, can accurately obtain and transmit the vibration situation, and can better control the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of a dither wheel for a miniaturized high-precision laser gyroscope in the present invention;

[0024] Figure 2 This is a three-dimensional diagram of a dither wheel used in a miniaturized high-precision laser gyroscope in the present invention at one angle;

[0025] Figure 3 This is a three-dimensional diagram from another angle of a dither wheel used in a miniaturized high-precision laser gyroscope in the present invention;

[0026] Figure 4 Schematic diagram of the structure of the laser gyroscope.

[0027] Description of reference numerals:

[0028] 1-first wheel body; 11-first plate body; 12-wheel plate; 2-second wheel body; 21-second plate body; 3-support; 4-first feedback body; 5-second feedback body; 6-cavity; 61-center hole; 62-semicircular opening; 71-light-combining prism; 72-first anode; 73-second anode; 74-first spherical mirror; 75-second spherical mirror; 76-first frequency stabilizer; 77-second frequency stabilizer; 78-cathode. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the 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 the specific circumstances.

[0032] like Figure 1-3 As shown, the utility model proposes a dither wheel for a miniaturized high-precision laser gyroscope, comprising:

[0033] The first wheel body 1 and the second wheel body 2, the second wheel body 2 is arranged on the first wheel body 1; the support 3 is arranged on the second wheel body 2, and the support 3 is provided with a mounting hole, and the support 3 can be connected to the cavity 6 by screws and other components; the first feedback body 4 is arranged on the second wheel body 2, and the second feedback body 5 is arranged on the first wheel body 1; during the use stage, the second wheel body 2 is driven to vibrate by the first feedback body 4, and the vibration is transmitted to the cavity 6 through the support 3, so that the vibration frequency is measured by the laser gyroscope. Specifically, the laser gyroscope measures the vibration obtained by the cavity 6 The vibration time domain information is converted into a frequency signal by Fourier transform, thereby obtaining the vibration frequency; the second feedback body 5 applies a feedback vibration force to the first wheel body 1 by using the piezoelectric effect, so that the vibration frequency of the cavity 6 is maintained at a set value, thereby improving the accuracy of the laser gyroscope; in the present invention, the vibration frequency of the cavity 6 is 400-600Hz; in addition, in order to ensure the overall strength, preferably, the first wheel body 1, the second wheel body 2 and the support 3 are integrally formed; in the present invention, preferably, the first feedback body 4 and the second feedback body 5 are both piezoelectric ceramics;

[0034] like Figure 2 and 3 As shown, the first wheel body 1 includes a wheel frame and a wheel plate 12, with the wheel plate 12 disposed on the periphery of the wheel frame. The wheel frame includes three first plates 11, with adjacent first plates 11 having the same angle between them. Each of the three first plates 11 is provided with a wheel plate 12. Specifically, the angles between the three first plates 11 are all 120°. To align with the center hole 61 in the cavity 6, the wheel plate 12 is preferably an arc-shaped plate to ensure that it fits snugly within the center hole 61 after the first wheel body 1 is placed therein.

[0035] The second wheel body 2 includes three second plates 21, and the three second plates 21 are respectively arranged between adjacent first plates 11; Figure 1 As shown, the three second plates 21 are staggered between the three first plates 11, and in the present invention, the angles between the three second plates 21 are the same, which is 120°. Of course, in order to better connect with the cavity 6, preferably, there are three supports 3, which are respectively arranged on the three second plates 21. In this way, when connecting with the cavity 6, the three supports 3 can be used to connect with the cavity 6 at the same time.

[0036] like Figure 1 As shown, the diameter of the ring around the periphery of the three second plates 21 is greater than the diameter of the ring around the periphery of the three first plates 11; specifically, the ring around the ends of the three second plates 21 away from the center of the wheel frame is larger than the ring around the ends of the first plates 11 connected to the wheel plate 12; in addition, after installation, it is necessary to ensure that there is no contact between the second plates 21 and the cavity 6;

[0037] like Figure 1-3 As shown, the first feedback bodies 4 are relatively arranged on both sides of the second plate body 21; and the first feedback bodies 4 are all arranged on the three second plates 21; the second feedback bodies 5 are arranged on one side of the first plate body 11; and the second feedback bodies 5 are all arranged on the three first plates 11; the jitter of the second plate body 21 is obtained through the first feedback bodies 4 on both sides of the second plate body 21; the jitter frequency of the cavity 6 is obtained through the feedback body on one side of the first plate body 11;

[0038] like Figure 4 As shown, the present invention also proposes a laser gyroscope, including a cavity 6 and a light processing component; it also includes a dither wheel for a miniaturized high-precision laser gyroscope; the first wheel body 1 is arranged on the cavity 6; wherein the light processing component includes a light-combining prism 71, a first anode 72, a second anode 73, a first spherical mirror 74, a second spherical mirror 75, a first frequency stabilizer 76, a second frequency stabilizer 77 and a cathode 78; the light processing components are all arranged on the cavity 6; at the same time, the cavity 6 is provided with a central hole 61 and a semicircular opening 62. In order to cooperate with the dither wheel, there are three semicircular openings 62, which are evenly spaced and arranged around the central hole 61;

[0039] During the installation phase, the first wheel body 1 is placed in the center hole 61, and the second wheel body 2 is placed in the semicircular opening 62. At the same time, it is necessary to ensure that the second wheel body 2 has no contact with the semicircular opening 62, that is, the second wheel body 2 has no direct contact with the cavity 6; the support 3 and the cavity 6 are fixed by screws, etc.; during the use phase, the first feedback body 4 drives the vibration generated by the second wheel body 2, and the vibration is transmitted to the support 3, and then transmitted to the cavity 6 through the support 3; the vibration obtained by the cavity 6 is measured by the gyroscope, and the vibration frequency is obtained after being converted into a frequency signal; the feedback vibration force is applied to the first wheel body 1 by the second feedback body 5, so that the vibration frequency of the cavity 6 is maintained at the set value, thereby improving the overall accuracy.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vibration wheel for a miniaturized high-precision laser gyroscope, characterized in that: include: A first wheel body (1) and a second wheel body (2), wherein the second wheel body (2) is arranged on the first wheel body (1); A support (3) is provided on the second wheel body (2); A first feedback body (4) for transmitting the vibration generated by the second wheel body (2) to the support (3), and arranged on the second wheel body (2); A second feedback body (5) for obtaining the vibration frequency of the cavity (6), which is arranged on the first wheel body (1); Wherein, the first wheel body (1) comprises: a wheel frame and a wheel plate (12), wherein the wheel plate (12) is arranged on the periphery of the wheel frame; The wheel frame comprises three first plates (11), and the angles between adjacent first plates (11) are the same; wheel plates (12) are provided on the three first plates (11); the second wheel body (2) comprises three second plates (21), and the three second plates (21) are respectively provided between adjacent first plates (11); The first feedback body (4) is relatively arranged on both sides of the second plate body (21); and the first feedback body (4) is arranged on each of the three second plates (21); the second feedback body (5) is arranged on one side of the first plate body (11); and the second feedback body (5) is arranged on each of the three first plates (11).

2. The jitter wheel for a miniaturized high-precision laser gyroscope according to claim 1, characterized in that: There are three supports (3), which are respectively arranged on three second plates (21).

3. The jitter wheel for a miniaturized high-precision laser gyroscope according to claim 2, characterized in that: The diameter of the circular ring where the peripheries of the three second plates (21) are located is greater than the diameter of the circular ring where the peripheries of the three first plates (11) are located.

4. The jitter wheel for a miniaturized high-precision laser gyroscope according to claim 3, characterized in that: The first wheel body (1), the second wheel body (2) and the support (3) are integrally formed.

5. A laser gyroscope comprising a cavity (6) and a light processing component; characterized in that: It also includes a jitter wheel for a miniaturized high-precision laser gyroscope according to any one of claims 1 to 4; the first wheel body (1) is arranged on the cavity (6).

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