Jitter wheel for miniaturized three-axis integrated laser gyroscope and laser gyroscope

Abstract

The utility model provides a dithering wheel for a miniaturized three-axis integrated laser gyroscope and the laser gyroscope. The dithering wheel comprises a plurality of driving arms and a plurality of adjusting arms which are arranged in a crossed manner, the number of the adjusting arms between the adjacent driving arms is equal; the fixing tables are arranged at one ends of the driving arms respectively; the plurality of adjusting plates are respectively arranged at one ends of the adjusting arms; the driving bodies are respectively arranged on the driving arms; the plurality of adjusting bodies are respectively arranged on the adjusting arms; the laser gyroscope comprises a cavity, a light path channel, a plurality of anodes, a plurality of cathodes, a plurality of spherical mirrors and a light combining mirror, and further comprises a shaking wheel for miniaturizing the three-axis integrated laser gyroscope, the plurality of driving arms and the plurality of adjusting arms are arranged in the cavity in a penetrating manner; according to the dithering wheel for the miniaturized three-axis integrated laser gyroscope and the laser gyroscope provided by the utility model, due to the arrangement of the dithering wheel, the precision of the laser gyroscope can be ensured, and meanwhile, the size of the laser gyroscope can be further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laser gyroscopes, and in particular to a dither wheel and a laser gyroscope for a miniaturized three-axis integrated laser gyroscope. Background Technique

[0002] A laser gyroscope is a sensing device based on the Sagnac effect for measuring the angular motion of a carrier, and 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, and is currently the most widely used gyroscope.

[0003] In the prior art, a single-axis laser gyroscope is adopted for a laser gyroscope, that is, a single-axis laser gyroscope can only measure the angular rate in one direction, and three single-axis laser gyroscopes need to be orthogonally installed to measure the angular rates in three directions to meet the requirements of an inertial navigation system. However, due to structural limitations, the single-axis laser gyroscope restricts the application of the laser gyroscope in the field of miniaturized applications.

[0004] In order to reduce the size of the laser gyroscope, in the prior art, the publication number is CN218097784U, and the name is a novel spatial three-axis laser gyro resonator cavity, including: a first sensitive optical loop, a second sensitive optical loop, and a third sensitive optical loop. The three sensitive optical loops intersect perpendicularly in pairs in a non-gain area pipeline. It ensures that the three optical paths will not interfere with each other, can be independently adjusted, and can effectively avoid technical difficulties such as the mutual correlation cavity and cross-frequency stabilization of the current spatial three-axis laser gyro. Further improve the accuracy of the spatial three-axis laser gyro and reduce the difficulty of cavity adjustment and frequency stabilization.

[0005] However, the overall size of the laser gyroscope in the prior art is still relatively large. Therefore, in order to reduce the size of the laser gyroscope while ensuring the accuracy of the laser gyroscope, a dither wheel for a miniaturized three-axis integrated laser gyroscope is urgently needed. Content of the Utility Model

[0006] The purpose of the utility model is to provide a dither wheel and a laser gyroscope for a miniaturized three-axis integrated laser gyroscope, and the dither wheel and the laser gyroscope for the miniaturized three-axis integrated laser gyroscope can solve the above technical problems;

[0007] The utility model provides a dither wheel for a miniaturized three-axis integrated laser gyroscope, including:

[0008] A plurality of driving arms and a plurality of adjusting arms, the plurality of driving arms and the plurality of adjusting arms are arranged crosswise; and the number of adjusting arms between adjacent driving arms is equal;

[0009] A number of fixed platforms are respectively arranged at one end of the driving arm; a number of adjusting plates are respectively arranged at one end of the adjusting arm.

[0010] A number of driving bodies are respectively arranged on the driving arm; a number of adjusting bodies are respectively arranged on the adjusting arm.

[0011] As a further technical solution, one end where a number of driving arms intersect is the first end, and the end far from the intersection is the second end; the fixed platform is arranged at the second end.

[0012] As a further technical solution, driving bodies are arranged oppositely on both sides of the adjusting arm.

[0013] As a further technical solution, there are three driving arms, and the angles between adjacent driving arms are equal.

[0014] As a further technical solution, one end of a number of adjusting arms is arranged at the first end of the driving arm, and a number of adjusting plates are respectively arranged at the other ends of a number of adjusting arms.

[0015] As a further technical solution, there are six adjusting arms, and the angles between adjacent adjusting arms are equal.

[0016] As a further technical solution, two adjusting arms are arranged between adjacent driving arms.

[0017] As a further technical solution, a number of adjusting bodies are respectively arranged on one side of a number of adjusting arms.

[0018] As a further technical solution, the diameter of the ring where the fixed platform is located is larger than the diameter of the ring where the adjusting plate is located.

[0019] The present utility model also provides a laser gyroscope, which includes a cavity, an optical path channel, a number of anodes, a number of cathodes, a number of spherical mirrors and a beam combining mirror, and also includes a dither wheel for miniaturizing a three-axis integrated laser gyroscope; a number of driving arms and a number of adjusting arms are both arranged in the cavity.

[0020] The technical solution of the present utility model forms a main body through a number of adjusting arms and a number of driving arms, and respectively arranges a number of fixed platforms on a number of driving arms and a number of adjusting plates on a number of adjusting arms; fixes a number of driving arms and a number of adjusting arms in the cavity through a number of fixed platforms, and realizes transmitting dithering to the cavity in cooperation with a number of driving bodies and a number of adjusting bodies during the use stage, and generates a feedback vibration force according to the obtained vibration frequency to keep the cavity at a set value; realizes canceling the lock-in area of the laser gyroscope; since the lock-in area of the laser gyroscope can be canceled by the dither wheel, the size of the cavity of the laser gyroscope can be further reduced; compared with the prior art, through the arrangement of the dither wheel, the accuracy of the laser gyroscope can be guaranteed, and at the same time, the size of the laser gyroscope can be further reduced. Description of the Drawings

[0021] In order to more clearly illustrate the specific embodiments of the present invention 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 drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Structural schematic diagram of a dither wheel for a miniaturized three-axis integrated laser gyroscope of the present invention;

[0023] Figure 2 Stereogram of a dither wheel for a miniaturized three-axis integrated laser gyroscope of the present invention at an angle;

[0024] Figure 3 Stereogram of a dither wheel for a miniaturized three-axis integrated laser gyroscope of the present invention at another angle;

[0025] Figure 4 Stereogram of a laser gyroscope of the present invention at an angle;

[0026] Figure 5 Stereogram of a laser gyroscope of the present invention at another angle.

[0027] Explanation of reference numerals:

[0028] 1 - driving arm; 2 - adjusting arm; 3 - fixed platform; 4 - adjusting plate; 5 - driving body; 6 - adjusting body; 7 - cavity; 8 - anode; 9 - cathode; 10 - spherical mirror; 11 - beam combining mirror. Specific embodiments

[0029] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] 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 therefore should not be construed as a limitation to the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined. In addition, the terms "mounted", "connected", and "connected" 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.

[0032] As Figures 1-3 shown, the present utility model provides a dither wheel for a miniaturized three-axis integrated laser gyroscope, comprising:

[0033] A plurality of drive arms 1 and a plurality of adjustment arms 2, the plurality of drive arms 1 and the plurality of adjustment arms 2 are arranged in a crosswise manner; and the number of adjustment arms 2 between adjacent drive arms 1 is equal; by arranging the plurality of drive arms 1 and the plurality of adjustment arms 2 in a crosswise manner, on the one hand, the stability of the overall structure can be ensured, and on the other hand, it can be ensured that when obtaining the vibration of the cavity 7 or controlling the vibration of the cavity 7, the cavity 7 can be more evenly stressed; a plurality of fixed platforms 3 are respectively arranged at one end of the drive arms 1; a plurality of adjustment plates 4 are respectively arranged at one end of the adjustment arms 2; when installed with the cavity 7, the plurality of fixed platforms 3 are fixed to the cavity 7; in the present utility model, mounting holes are provided on the fixed platforms 3, and the fixed platforms 3 and the cavity 7 can be connected by bolts or screws, etc., to achieve the fixation between the fixed platforms 3 and the cavity 7; after the plurality of adjustment plates 4 are installed with the cavity 7, they are in contact with the cavity 7, and can transmit the force to the cavity 7 under the control of the plurality of adjustment arms 2, so as to achieve the control of the vibration frequency of the cavity 7.

[0034] As Figures 1-3As shown, a number of driving bodies 5 are respectively arranged on the driving arm 1; a number of adjusting bodies 6 are respectively arranged on the adjusting arm 2; in the actual application stage, the driving body 5 drives the driving arm 1 to vibrate, and the vibration is transmitted to the cavity 7 through the fixed platform 3, so as to measure the vibration frequency through the laser gyroscope. Specifically, the laser gyroscope measures the vibration obtained by the cavity 7, and converts the measured vibration time-domain information into a frequency signal by Fourier transform, and then obtains the vibration frequency; the adjusting body 6 applies a feedback vibration force to the adjusting arm 2 by using the piezoelectric effect. Since a number of adjusting plates 4 are in contact with the cavity 7, the vibration frequency of the cavity 7 is maintained at a set value under the cooperation of the adjusting arm 2 and the adjusting plates 4; thereby improving the accuracy of the laser gyroscope; in the present utility model, the vibration frequency of the cavity 7 is 400 - 600 Hz; it should be noted that in the present utility model, driving bodies 5 are arranged oppositely on both sides of the adjusting arm 2 to ensure that the vibration transmitted from the adjusting arm 2 to the cavity 7 is more uniform;

[0035] In addition, to ensure the overall strength, preferably, the driving arm 1, the adjusting arm 2 and the adjusting plates 4 are integrally formed; and in the present utility model, preferably, both the driving body 5 and the adjusting body 6 are piezoelectric ceramics.

[0036] As Figure 1 shown, one end where a number of driving arms 1 intersect is the first end, and the end far from the intersection is the second end; the fixed platform 3 is arranged at the second end; there are three driving arms 1, and the angles between adjacent driving arms 1 are equal; in the present utility model, the angle between adjacent driving arms 1 is 120°; one end of a number of adjusting arms 2 is arranged at the first end of the driving arm 1, and a number of adjusting plates 4 are respectively arranged at the other ends of a number of adjusting arms 2; so that a number of adjusting plates 4 are placed outside a number of adjusting arms 2 and can be in contact with the cavity 7 when placed in the cavity 7; in the present utility model, preferably, there are six adjusting arms 2, and the angles between adjacent adjusting arms 2 are equal; in the present utility model, preferably, the angle between adjacent adjusting arms 2 is 60°;

[0037] It should be further noted that two adjusting arms 2 are arranged between adjacent driving arms 1; to ensure that the feedback vibration force can be evenly transmitted into the cavity 7 after being obtained; and in the present utility model, a number of adjusting bodies 6 are respectively arranged on one side of a number of adjusting arms 2, and a number of adjusting bodies 6 are all arranged on the same side of a number of adjusting arms 2; further ensuring the stability of the transmission of the feedback vibration force to the cavity 7;

[0038] In addition, the diameter of the ring where the fixed platform 3 is located is greater than the diameter of the ring where the adjusting plates 4 are located; so that after installation, the fixed platform 3 is placed outside the cavity 7, and the fixing effect is improved on the premise of not affecting the driving arm 1 and the adjusting arm 2 after being fixed to the cavity 7.

[0039] As Figures 4-5As shown in the figure, the present utility model also provides a laser gyroscope, which includes a cavity 7, an optical path channel, a plurality of anodes 8, a plurality of cathodes 9, a plurality of spherical mirrors 10 and a beam combining mirror 11, and further includes a dither wheel for miniaturizing a three-axis integrated laser gyroscope; a plurality of drive arms 1 and a plurality of adjustment arms 2 are both arranged in the cavity 7; in the present utility model, the cavity 7 is a four-sided structure, and a first mounting plane is formed between adjacent surfaces, and the plurality of anodes 8 and the plurality of cathodes 9 are respectively arranged on the first mounting plane; in addition, second mounting planes are respectively formed at the four corners of the cavity 7, and the plurality of spherical mirrors 10 are arranged on three of the second mounting planes, and the beam combining mirror 11 is arranged on the other second mounting plane; it should be noted that in the present utility model, the optical path channel is arranged in the cavity 7, and the plurality of anodes 8, the plurality of cathodes 9, the plurality of spherical mirrors 10 and the beam combining mirror 11 are respectively communicated with the optical path channel; an installation cavity is formed on one surface of the cavity 7, and the installation cavity is arranged opposite to the position where the beam combining mirror 11 is located, and the dither wheel is arranged in the installation cavity, and the fixing platform 3 is fixed to one surface of the cavity 7 by bolts or screws passing through the plurality of fixing platforms 3; after installation, the plurality of adjustment plates 4 are in contact with the inner wall of the installation cavity; it should be further noted that the cross-section of the installation cavity is circular, and the adjustment plate 4 is an arc-shaped adjustment plate 4, so that after the arc-shaped plate is placed in the installation cavity, it can ensure that the arc-shaped plate is in full contact with the inside of the installation cavity.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; 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 described 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 dither wheel for a miniaturized three-axis integrated laser gyroscope, characterized in that, Comprising: A plurality of drive arms (1) and a plurality of adjustment arms (2), the plurality of drive arms (1) and the plurality of adjustment arms (2) being arranged in a crosswise manner; and the number of adjustment arms (2) between adjacent drive arms (1) being equal; A plurality of fixed platforms (3), respectively arranged at one end of the drive arms (1); a plurality of adjustment plates (4), respectively arranged at one end of the adjustment arms (2); A plurality of drive bodies (5), respectively arranged on the drive arms (1); a plurality of adjustment bodies (6), respectively arranged on the adjustment arms (2).

2. The dither wheel for a miniaturized three-axis integrated laser gyroscope according to claim 1, wherein One end where a plurality of the drive arms (1) intersect is the first end, and the end far from the intersection is the second end; the fixed platform (3) is arranged at the second end.

3. The dither wheel for a miniaturized three-axis integrated laser gyroscope according to claim 2, characterized in that, Drive bodies (5) are arranged oppositely on both sides of the adjustment arm (2).

4. The dither wheel for a miniaturized three-axis integrated laser gyroscope according to claim 2, wherein There are three drive arms (1), and the angles between adjacent drive arms (1) are equal.

5. The dither wheel for a miniaturized three-axis integrated laser gyroscope according to claim 2, wherein One end of a plurality of the adjustment arms (2) is arranged at the first end of the drive arms (1), and a plurality of adjustment plates (4) are respectively arranged at the other ends of the plurality of adjustment arms (2).

6. The dither wheel for a miniaturized three-axis integrated laser gyroscope according to claim 5, wherein, There are six adjustment arms (2), and the angles between adjacent adjustment arms (2) are equal.

7. The dither wheel for a miniaturized three-axis integrated laser gyroscope according to claim 6, wherein Two adjustment arms (2) are arranged between adjacent drive arms (1).

8. The dither wheel for a miniaturized three-axis integrated laser gyroscope according to claim 5, characterized in that, A plurality of the adjustment bodies (6) are respectively arranged on one side of the plurality of adjustment arms (2).

9. The dither wheel for a miniaturized three-axis integrated laser gyroscope according to claim 1, characterized in that, The diameter of the circle where the fixed platform (3) is located is larger than the diameter of the circle where the adjustment plate (4) is located.

10. A laser gyroscope, characterized in that, Comprising a cavity (7), an optical path channel, a plurality of anodes (8), a plurality of cathodes (9), a plurality of spherical mirrors (10) and a light combining mirror (11), and further comprising a dither wheel for a miniaturized three-axis integrated laser gyroscope according to any one of claims 1-9; a plurality of drive arms (1) and a plurality of adjustment arms (2) are both arranged in the cavity (7).

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