CN201476791U

CN201476791U - Miniature three-shaft non-framework optical fiber gyroscope

Info

Publication number: CN201476791U
Application number: CN2009202276769U
Authority: CN
Inventors: 彭志强
Original assignee: STATE HONGFENG MACHINERY FACTORY
Current assignee: Hubei Sanjiang Aerospace Hongfeng Control Co Ltd
Priority date: 2009-08-26
Filing date: 2009-08-26
Publication date: 2010-05-19
Anticipated expiration: 2019-08-26

Abstract

The utility model relates to a miniature three-shaft non-framework optical fiber gyroscope which comprises a main body and an optical fiber ring. The miniature three-shaft non-framework optical fiber gyroscope is characterized in that the optical fiber ring adopts a non-framework optical fiber ring; and the non-framework optical fiber ring is adhered on the main body. In the utility model, the zero position stability of the optical fiber gyroscope within the full temperature range (minus 40-70 DEG C) can be improved by adopting the non-framework optical fiber ring under the condition of same design accuracy of a three-shaft optical fiber gyroscope; and meanwhile, the production of three ring bodies is reduced by applying the utility model so as to facilitate the cost reduction of the three-shaft optical fiber gyroscope. In addition, the miniaturization design of products is facilitated by adopting an improved structure.

Description

The exoskeletal optical fibre gyro of small-sized triaxial

Technical field

The utility model belongs to a kind of optical fibre gyro, in particular, is to have three fiber optic loop of three axis optical fibre gyro now by there being framework ring to be designed to the exoskeletal optical fibre gyro of small-sized triaxial of exoskeletal fiber optic loop.

Background technology

Advantages such as optical fibre gyro has structure of whole solid state, toggle speed is fast, dynamic range is big, shock resistance is strong, production technology is good are widely used in military domain and numerous industrial circles such as automobile, geologic prospecting such as Aeronautics and Astronautics, navigation.

Fiber optic loop is as the main sensing unit of optical fibre gyro, and precision and the stability of optical fibre gyro is had a significant impact.External environment changes the stress that (for example temperature variation, mechanical stress etc.) produces fiber optic loop, can produce the nonreciprocity phase noise, directly affect precision and performance, the especially optical fibre gyro zero stability under total temperature scope (40 ℃～70 ℃) of optical fibre gyro.

At present, the general structure of the fiber optic loop of three axis optical fibre gyro is to be fixed on this body support frame by three identical fiber optic loop of physical dimension, and its employed fiber optic loop is the fiber optic loop that ring body is arranged; Its structural drawing as shown in Figure 1, optical fibre gyro adopts metal material (or other material) to make a ring body (as Fig. 1 sequence number 14) usually, optical fiber winding equipment by special use is wound on the optical fiber of specified length on the ring body, and adopt special process with optical fiber be cured, stabilized treatment etc., on the ring body of the intact optical fiber of coiling, install a ring body outer cover additional then, so just finished a complete fiber optic loop.Gyro is fixed on the body with screw by the screw mounting hole on the ring body during installation.

Because the ring body (skeleton) of fiber optic loop is generally made with metal material (or other materials).If optical fibre gyro is used the skeleton fiber optic loop is arranged, when ambient temperature changed, temperature variation can be delivered on the optical fiber very soon by ring body, because the thermal expansivity of optical fiber and ring body is inequality, also can cause mechanical stress to optical fiber simultaneously.The physical property of fiber optic loop and optical performance parameter can change like this, and then produce the reciprocity phase noise, thereby make the zero-bit output stability variation of gyro.

Summary of the invention

The purpose of this utility model provides a kind of by changing the traditional structure form of existing three axis optical fibre gyro, use exoskeletal fiber optic loop, be beneficial to the exoskeletal optical fibre gyro of small-sized triaxial of the miniaturization of gyro product, to overcome because of the metal material skeleton the variation in the distortion that sensitivity was produced of temperature and temperature field to the physical property of fiber optic loop and the defective of optical property influence.

To achieve these goals, the utility model comprises body and fiber optic loop, is characterized in: fiber optic loop adopts exoskeletal fiber optic loop, and exoskeletal fiber optic loop is bonded on the body.

Because the utility model adopts exoskeletal fiber optic loop, can under the condition of the same design accuracy of three axis optical fibre gyro, improve the zero stability of optical fibre gyro in total temperature scope (40 ℃～70 ℃); Use the utility model simultaneously and will reduce the production of three ring bodies, the cost that helps three axis optical fibre gyro reduces; In addition, improve the miniaturization Design that structure more helps product.

Description of drawings

Fig. 1 is for there being the structural representation of skeleton three axis optical fibre gyro.

Fig. 2 is a structural representation of the present utility model.

Fig. 3 is the scheme of installation of the exoskeletal fiber optic loop of the utility model.

Fig. 4 is the assembling synoptic diagram of exoskeletal fiber optic loop of the utility model and body.

Among the figure: 1-body, 2-optical fiber, 3-ring body, 4-ring body outer cover, 5-2 * 2 fiber couplers, 6-pressing plate, the exoskeletal fiber optic loop of 7-, 8-gyro mainboard, 9-SLD light source, 10-Y waveguide, 11-light source driving board.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

The utility model is to utilize exoskeletal fiber optic loop winding technology, complete fiber optic loop of frock ring body coiling, carry out releasing process, typing processing etc. then a complete fiber optic loop that only contains optical fiber is separated with the frock ring body, so just formed an exoskeletal fiber optic loop.Because the product of moulding has been cancelled ring body, when gyro assembles, only need reference field with exoskeletal fiber optic loop bond on the body and get final product, the surface of contact (surface of contact has A, B, C totally three faces among Fig. 1) that so just makes exoskeletal fiber optic loop and body base material from before three be reduced to present one (surface of contact has only face of B face Fig. 4).So just greatly reduced the contact area of optical fiber and body base material (metal or other materials), reduced the influence of ambient temperature variation, can greatly improve the zero partially stability of optical fibre gyro in total temperature scope (40 ℃～70 ℃) optical fiber; In addition, the structure behind the cancellation ring body makes existing exoskeletal three axis optical fibre gyro volume littler, more compact structure for the miniaturization Design of gyro provides possibility.

The content that is not described in detail in this instructions belongs to professional and technical personnel's known prior art in this area.

Claims

1. the exoskeletal optical fibre gyro of small-sized triaxial comprises body and fiber optic loop, and it is characterized in that: fiber optic loop adopts exoskeletal fiber optic loop, and exoskeletal fiber optic loop is bonded on the body.