CN112665571A

CN112665571A - Embedded shaking system of laser gyroscope

Info

Publication number: CN112665571A
Application number: CN202011400464.3A
Authority: CN
Inventors: 王利伟; 杨志斌; 孙仁胜; 王强
Original assignee: 717th Research Institute of CSIC
Current assignee: 717th Research Institute of CSIC
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-04-16
Anticipated expiration: 2040-12-01
Also published as: CN112665571B

Abstract

The invention provides an embedded type jitter system of a laser gyroscope, which cancels a shell boss structure, integrates a support boss and a jitter wheel in the prior art, solves the problem of uneven heat transfer between a shell and a resonant cavity from the structural design, simultaneously improves the rigidity of the jitter system of the laser gyroscope to the maximum extent, and also effectively avoids the problem that the jitter performance of the laser gyroscope is influenced by the inconsistent mounting torque of screws on the shell support boss and the jitter wheel.

Description

Embedded shaking system of laser gyroscope

Technical Field

The invention relates to the technical field of laser gyroscope manufacturing, in particular to an embedded type dithering system of a laser gyroscope.

Background

In order to eliminate the influence of the locking effect that the laser gyroscope cannot measure a small angular rate, a dithering offset frequency technology is generally adopted at present, and the mechanical dithering offset frequency technology does not increase the complexity of an optical path and does not introduce accumulative errors, so the mechanical dithering offset frequency technology is most widely applied.

Because the application environments of the shaking mechanism and the shell are different, the shaking mechanism is usually made of super Invar (Invar) materials with low expansion coefficients, the shell is made of aviation hard aluminum (7075) materials with high strength and strong corrosion resistance, the shell of the mechanically-shaken laser gyroscope is usually processed into a structural form with a supporting boss in order to be separated from a resonant cavity by a certain distance, and the shaking mechanism and the shell are usually assembled in a mode that the shaking mechanism is rigidly connected with a shell mounting boss.

Disclosure of Invention

The invention provides an embedded type laser gyroscope dithering system, which cancels a boss structure of a shell, integrates a support boss and a dithering wheel in the prior art, solves the problem of uneven heat transfer between the shell and a resonant cavity from the structural design, simultaneously improves the rigidity of the dithering system of the laser gyroscope to the maximum extent, and also effectively avoids the problem that the dithering performance of the laser gyroscope is influenced due to inconsistent mounting torque of a screw on the support boss and the dithering wheel of a shell.

The technical scheme of the invention is as follows: including embedded dither wheel, piezoceramics piece, disc base and planar shell, embedded dither wheel spoke both sides face respectively is equipped with a piezoceramics piece, embedded dither wheel lower extreme and disc base fixed connection, the disc base is fixed in bottom in the planar shell.

Preferably, the lower end of the embedded shaking wheel and the disc base are of an integrated structure.

Preferably, the lower end of the embedded type shaking wheel is uniformly provided with a plurality of supporting steel columns which are of an integrated structure with the shaking wheel along the circumferential direction, and the lower ends of the steel columns are integrally connected with the disc base.

Preferably, the bottom of the planar shell is provided with a cylindrical groove, and the disc base is arranged in the cylindrical groove and fixedly connected with the planar shell through a bolt.

The invention has the beneficial effects that: 1) the invention can effectively avoid the influence on the jitter performance of the laser gyroscope due to the inconsistent installation moments of the jitter wheel and the boss of the shell.

2) The invention can effectively enhance the rigidity of the laser gyro dither system and reduce the response amplitude.

3) The invention optimizes the point contact of the traditional vibrating wheel and the shell into surface contact, and improves the heat transfer uniformity and the assembly stress of the laser gyroscope.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view of the planar housing according to the present invention.

Detailed Description

Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the structure of this embodiment includes an embedded type shaking wheel 1, a piezoelectric ceramic piece 2, a disc base 3 and a planar housing 5, two side faces of a spoke 6 of the embedded type shaking wheel 1 are respectively provided with a piezoelectric ceramic piece 2, the lower end of the embedded type shaking wheel 1 is fixedly connected with the disc base 3, and the disc base 3 is fixed at the bottom in the planar housing 5.

In this embodiment, the lower end of the embedded shaking wheel 1 and the disc base 3 are an integrated structure.

In this embodiment, a plurality of support steel columns 5 integrated with the shaking wheel 1 are uniformly arranged at the lower end of the embedded shaking wheel 1 along the circumferential direction, and the lower ends of the steel columns 5 are integrally connected with the disc base 3.

In this embodiment, a cylindrical groove 7 is formed in the bottom of the planar housing 5, and the disc base 3 is disposed in the cylindrical groove 7 and is fixedly connected to the planar housing 5 through a bolt.

The embedded type shaking system of the laser gyroscope in the embodiment is composed of an embedded type shaking wheel 1(1) and 16 bar-shaped piezoelectric ceramic pieces 2(2), wherein the lower end of the shaking wheel 1 is provided with an integrated disc base 3 which is connected through a support steel column 5, the two sides of each spoke 6 of the embedded type shaking wheel 1(1) are symmetrically adhered with the piezoelectric ceramic pieces 2(2) through structural glue, a metal wire is welded at each selected point on each piezoelectric ceramic piece 2(2) to form a shaking mechanism, the disc base 3 of the shaking mechanism is embedded into a groove of a plane type shell 5(3), and the disc base 3 and the plane type shell 5(3) are rigidly fixed through 8 screws to form the shaking system. The 16 pieces of piezoelectric ceramic pieces 2 and 2 are connected with the bonding surface of the embedded

type shaking wheel

1 and 1 by a ground wire, the leading-out wires of the piezoelectric ceramic pieces 2 and 2 are connected with an alternating current driving voltage, under the action of the driving voltage, the 16 pieces of piezoelectric ceramic pieces 2 and 2 generate piezoelectric effect to generate deformation, and the spokes 6 of the shaking wheel 1 are driven to generate torsion, so that the resonant cavity is driven to shake and over-lock.

The technical scheme of this embodiment is mainly that support boss and shake wheel 1 between laser gyro resonant cavity and shell among the prior art are as an organic whole for shake mechanism passes through face contact and shell rigid fixed connection, has solved the inhomogeneous problem of heat transfer of shell with the resonant cavity from structural design, furthest's promotion laser gyro shake system rigidity problem simultaneously, also effectively avoided casing support boss and shake mechanism because of the inconsistent problem that influences laser gyro's shake performance of screw installation moment.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The laser gyro embedded type shaking system is characterized in that: including embedded dither wheel, piezoceramics piece, disc base and planar shell, embedded dither wheel spoke both sides face respectively is equipped with a piezoceramics piece, embedded dither wheel lower extreme and disc base fixed connection, the disc base is fixed in bottom in the planar shell.

2. The laser gyro embedded dither system of claim 1, characterized in that: the lower end of the embedded type shaking wheel and the disc base are of an integrated structure.

3. The laser gyro embedded dither system of claim 2, characterized in that: the lower end of the embedded type shaking wheel is uniformly provided with a plurality of supporting steel columns which are of an integrated structure with the shaking wheel along the circumferential direction, and the lower end of each steel column is integrally connected with the disc base.

4. The laser gyro embedded dither system of claim 2, characterized in that: the disc base is arranged in the cylindrical groove and is fixedly connected with the plane type shell through a bolt.