CN213120579U

CN213120579U - Tool for winding optical fiber sensing coil of optical fiber gyroscope

Info

Publication number: CN213120579U
Application number: CN202022083791.2U
Authority: CN
Inventors: 王树宇; 庞璐; 吴博; 吴迪; 王东波; 刘笑东
Original assignee: CETC 46 Research Institute
Current assignee: CETC 46 Research Institute
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-05-04
Anticipated expiration: 2030-09-22

Abstract

The utility model discloses a frock is used in fiber-optic gyroscope's optic fibre sensing coil coiling, the clamping apparatus comprises a clamping base, the skeleton, the cassette is by the upper end plane, the lower extreme plane, the lateral surface is the cambered surface connection side plane, and side plane perpendicular to lower extreme plane, upper end plane is parallel with the lower extreme plane, constitute circular disk body, inboard center have with skeleton lateral wall movable fit's interior round groove, the upper end plane, the cambered surface, side plane surface has the coating, coating thickness is less than 0.1mm, the lateral wall tight fit of skeleton both sides is tight in the outer terminal surface center department of two cassettes in the epaxial locking nut tops of coiling machine both ends in the indent circular slot of two relative cassettes during the use, the optic fibre that keeps fiber sensing coil one end all the time draws forth the skeleton outside through the spherical area of cassette and fixes, can the wire winding. The effect is that the external force action of factors such as coil framework, tool and equipment on the optical fiber on the sensing coil can be effectively prevented, and the long-term working reliability of the sensing coil is improved.

Description

Tool for winding optical fiber sensing coil of optical fiber gyroscope

Technical Field

The utility model relates to an optic fibre top's optic fibre sensing coil coiling especially relates to a optic fibre top's frock for optic fibre sensing coil coiling.

Background

The interference type optical fiber gyroscope interferometer mainly comprises five parts, namely a light source, a light splitting waveguide, an optical fiber sensing coil, a polarizer, a detector and the like. The optical fiber sensing coil is formed by winding a polarization maintaining optical fiber or a low-birefringence optical fiber according to a certain mode (such as quadrupole symmetry). The fiber optic gyro system can measure the angular velocity of rotation of an object by measuring the phase difference between two beams of light in the fiber optic sensing coil.

The mechanical reliability of the fiber optic sensing coil directly determines the working life of the fiber optic gyroscope. The sensing coil body is a polarization maintaining optical fiber, the polarization maintaining optical fiber body is made of quartz materials, and the surface of the polarization maintaining optical fiber body is coated with polyurethane acrylate and other composite materials. The quartz material is a light transmission part, and the composite material provides a protection effect for the quartz material. After the optical fiber is drawn, a large number of micro cracks exist on the surface of the quartz, the micro cracks grow along with the increase of time, and meanwhile, the growth of the micro cracks can be accelerated by factors such as external force, microbending and the like. When the microcracks grow to a certain degree, the optical fibers can be broken, and at the moment, the optical fiber sensing coil and the optical fiber gyroscope can not work normally.

Factors affecting the mechanical reliability of the optical fiber sensing coil mainly include: mechanical reliability of the polarization maintaining optical fiber, coil winding tension, coil winding equipment, used tools and the like. The mechanical reliability of the polarization maintaining optical fiber can be ensured through tension screening; the stress received by the optical fiber can be reduced by properly reducing the winding tension of the coil, so that the mechanical reliability is improved; the large-diameter fiber supply wheel and the guide wheel are used on the coil winding equipment as much as possible, so that the bending stress on the optical fiber can be effectively reduced. And the proper fiber winding tool can avoid the optical fiber from being subjected to larger local stress in the winding process, thereby improving the mechanical reliability of the coil.

Disclosure of Invention

In view of the problems existing in the prior art, the utility model provides a frock is used in fiber optic gyroscope's optic fibre sensing coil coiling can improve the mechanical reliability performance of optic fibre sensing ring circle. The specific technical scheme is that a frock is used in optic fibre top's optic fibre sensing coil coiling, including the cassette, its characterized in that: the clamping seat is composed of an upper end plane, a lower end plane and an outer side surface which are parallel to each other. The inner side center is provided with a circular disc body which is movably matched with the side wall of the framework and consists of an inner circular groove, the outer side surface is an arc surface and is connected with a side plane, the side plane is perpendicular to a lower end plane, the upper end plane is parallel to the lower end plane, the thickness of the clamping seat is not less than 4mm, the width of the upper end plane of the clamping seat is not less than 1mm, the radius of the arc surface of the outer side surface of the clamping seat is 5-15mm, the length of the arc surface is 1/4 of the circumference, the two ends of the arc surface are respectively tangent to the upper end plane and the side plane, the depth of the inner circular groove is the same as the thickness of the side wall of the framework, the upper end plane.

The utility model discloses the beneficial effect of utensil is, simple structure, preparation are easy, and optical fiber sensing coil is at the coiling in-process, and the mechanical reliability of optic fibre has been improved to the extrusion of not receiving stress.

Drawings

FIG. 1 is a sectional view of the structure of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a schematic view of the present invention in use and installation;

fig. 4 is an exploded view of the embodiment of the present invention.

Detailed Description

The utility model provides a frock is used in optic fibre top's optic fibre sensing coil coiling, below combine the figure and the embodiment, it is right the utility model discloses further detailed description proceeds.

Example one

As shown in fig. 1, 2, 3, and 4, a tool for winding an optical fiber sensing coil of an optical fiber gyroscope is provided, in which the dimension of a bobbin 2 for winding an optical fiber sensing coil is: the sidewall thickness a is 2.0mm and the outer diameter b is 60.0 mm.

The material of the clamping seat 1 is aluminum, the thickness is 6mm,

the radius f of the cambered surface is 1-3 mm, the width e of the upper end plane is 1mm, the inner diameter c of the inner circular groove 1-5 is 60.0^+0.2mm, depth d is 2.0 mm; the surfaces of the upper end plane 1-1, the cambered surface 1-3 and the side plane 1-4 are provided with flexible material coating layers 1-6, and the coating thickness is equal to 0.05 mm.

When the optical fiber winding machine is used, two side walls of the framework 2 are movably matched in the inner circle grooves 1-5 of the two opposite clamping seats 1, the two locking nuts 3 on the main shafts 4 at the two ends of the winding machine are tightly propped against the centers of the lower end faces of the two clamping seats 1, the optical fiber at one end of the optical fiber sensing coil is always led out of the framework 2 through the arc surface 1-3 areas of the clamping seats 1 to be fixed, and then the coil is wound. The external force action of the tool on the optical fiber is effectively reduced, the mechanical reliability of the coil is improved, and the damage rate of the optical fiber is lower than one millionth and better than that of a conventional tool.

Although the present invention has been described with reference to the above examples, the present invention is not limited to the above examples, and any modifications of the present invention, including the difference of the diameters of the circular arcs, the difference of the thickness of the tool, the difference of the shape of the non-optical fiber contact surface on the tool, etc., which are conceivable by those skilled in the art after the description of the present invention, should be considered as within the scope of the present invention.

Claims

1. The utility model provides a frock is used in fiber optic gyroscope's optic fibre sensing coil coiling, includes cassette (1), its characterized in that: the clamping seat (1) is a circular disk body consisting of an upper end plane (1-1) and a lower end plane (1-2) which are parallel to each other, an inner circular groove (1-5) which is movably matched with the side wall of the framework (2) is arranged in the center of the inner side of the clamping seat (1), the outer side is an arc surface (1-3) which is connected with the side plane (1-4), the side plane (1-4) is vertical to the lower end plane (1-2), wherein the thickness of the clamping seat (1) is not less than 4mm, the width of the upper end plane (1-1) of the clamping seat (1) is not less than 1mm, the radius of the arc surface (1-3) of the outer side of the clamping seat (1) is 5-15mm, the length of 1/4 is the circumferential length of the arc surface, two ends of the arc surface (1-3) are respectively tangent to the upper end plane (1-1) and the side plane (1-4), the depth of the inner circular, the surfaces of the upper end plane (1-1), the cambered surface (1-3) and the side plane (1-4) are provided with flexible material coating layers (1-6), and the coating thickness is less than 0.1 mm.