阅读说明：本技术 一种温控式光纤环模块 (Temperature control type optical fiber ring module ) 是由 洪伟 张培 江维 黄博 汪刚 李云娇 娄少锋 马彦武 赵永亮 于 2019-12-12 设计创作，主要内容包括：本发明涉及一种温控式光纤环模块,目的是为了解决现有技术中存在的到温时间过长、保温电流过大以及光纤环受热不均匀的问题。本发明包括第一导热层、第二导热层、加热片、隔热层；第一导热层设置于光纤环与磁屏蔽骨架的底部之间；第二导热层包括一体设置的内导热层、外导热层、和底导热层；内导热层设置于磁屏蔽骨架的内侧面；外导热层设置于磁屏蔽骨架的外侧面；底导热层设置于磁屏蔽骨架的底部与磁屏蔽外壳的底部之间；加热片位于外导热层外；隔热层包括一体设置的内隔热层、外隔热层和底隔热层；内隔热层设置于内导热层外；外隔热层设置于加热片外以及磁屏蔽骨架的顶面外；底隔热层设置于底导热层与磁屏蔽外壳的底部之间。(The invention relates to a temperature control type optical fiber ring module, and aims to solve the problems of overlong temperature reaching time, overlarge heat preservation current and nonuniform heating of an optical fiber ring in the prior art. The invention comprises a first heat conduction layer, a second heat conduction layer, a heating sheet and a heat insulation layer; the first heat conduction layer is arranged between the optical fiber ring and the bottom of the magnetic shielding framework; the second heat conduction layer comprises an inner heat conduction layer, an outer heat conduction layer and a bottom heat conduction layer which are integrally arranged; the inner heat conducting layer is arranged on the inner side surface of the magnetic shielding framework; the outer heat conducting layer is arranged on the outer side surface of the magnetic shielding framework; the bottom heat conduction layer is arranged between the bottom of the magnetic shielding framework and the bottom of the magnetic shielding shell; the heating sheet is positioned outside the outer heat conducting layer; the heat insulation layer comprises an inner heat insulation layer, an outer heat insulation layer and a bottom heat insulation layer which are integrally arranged; the inner heat insulation layer is arranged outside the inner heat conduction layer; the outer heat insulation layer is arranged outside the heating sheet and the top surface of the magnetic shielding framework; the bottom heat-insulating layer is arranged between the bottom heat-conducting layer and the bottom of the magnetic shielding shell.)

1. A temperature control type optical fiber ring module comprises a magnetic shielding shell (1), wherein a magnetic shielding framework (2) is installed in the magnetic shielding shell (1), an optical fiber ring (3) is embedded in the magnetic shielding framework (2), and an inner lining plate (4) is embedded in the middle of the magnetic shielding framework (2); the method is characterized in that: the heating device also comprises a first heat conduction layer (5), a second heat conduction layer (6), a heating sheet (7) and a heat insulation layer (8);

the first heat conduction layer (5) is arranged between the optical fiber ring (3) and the bottom of the magnetic shielding framework (2);

the second heat conduction layer (6) comprises an inner heat conduction layer (61), an outer heat conduction layer (62) and a bottom heat conduction layer (63) which are integrally arranged;

the inner heat conduction layer (61) is arranged on the inner side surface of the magnetic shielding framework (2);

the outer heat conduction layer (62) is arranged on the outer side surface of the magnetic shielding framework (2);

the bottom heat conduction layer (63) is arranged between the bottom (2) of the magnetic shielding framework and the bottom of the magnetic shielding shell (1);

the heating sheet (7) is positioned outside the outer heat conduction layer (62);

the heat insulation layer (8) comprises an inner heat insulation layer (81), an outer heat insulation layer (82) and a bottom heat insulation layer (83) which are integrally arranged;

the inner heat insulation layer (81) is arranged outside the inner heat conduction layer (61);

the outer heat insulation layer (82) is arranged outside the heating sheet (7) and the top surface of the magnetic shielding framework (2);

the bottom heat insulation layer (83) is arranged between the bottom heat conduction layer (63) and the bottom of the magnetic shielding shell (1).

2. The temperature controlled fiber optic ring module of claim 1, wherein: also comprises a heat insulation sheet (9);

the heat insulation sheet (9) is positioned between the bottom of the inner lining plate (4) and the bottom of the magnetic shielding shell (1).

3. A temperature controlled fiber optic ring module according to claim 1 or 2, wherein:

the titanium alloy screw structure also comprises a plurality of titanium alloy screws (101) which are uniformly distributed along the circumferential direction;

the head of the titanium alloy screw (101) is positioned outside the magnetic shielding framework (2);

the screw part of the titanium alloy screw (101) sequentially penetrates through the top surface of the magnetic shielding framework (2), the inner lining plate (4), the heat insulation sheet (9) and the magnetic shielding shell (1) and then is fixedly connected with the external platform body (11);

a heat-shrinkable sleeve (102) is coaxially sleeved outside the screw part of the titanium alloy screw (101);

an elastic cushion (103) and a heat insulation gasket (104) are arranged between the head of the titanium alloy screw (101) and the top surface of the magnetic shielding framework (2).

4. A temperature controlled fiber optic ring module according to claim 3, wherein:

the first heat conduction layer (5) and the second heat conduction layer (6) are made of graphite heat conduction sheets or copper foils.

5. The temperature controlled fiber optic ring module of claim 4, wherein:

the heat conductivity coefficient of the heat insulation layer (8) is less than 0.1W/m.K, and the thickness is more than 1 mm.

6. The temperature controlled fiber optic ring module of claim 5, wherein:

the heat insulation layer (8) is made of polyurethane foam.

7. The temperature controlled fiber optic ring module of claim 2, wherein:

the heat conductivity coefficient of the heat insulation sheet (9) is less than 1W/m.K.

8. The temperature controlled fiber optic ring module of claim 7, wherein:

the heat insulation sheet (9) is an epoxy glass cloth plate.

9. A temperature controlled fiber optic ring module according to claim 3, wherein:

the thermal conductivity of the heat insulating gasket (104) is less than 1W/m.K.

10. The temperature controlled fiber optic ring module of claim 9, wherein:

the heat insulating gasket (104) is an epoxy glass cloth plate.

Technical Field

The invention relates to a fiber optic gyroscope, in particular to a temperature control type fiber optic ring module.

Background

The fiber-optic gyroscope has the advantages of impact resistance, high sensitivity, long service life, large dynamic range, short starting time and the like, and is widely applied to an inertial navigation system.

The temperature problem is a key point in the development process of the high-precision fiber-optic gyroscope, the current system-level solving approaches mainly comprise temperature control and temperature compensation, the temperature control can furthest exert the precision advantage of the fiber-optic gyroscope under the condition of not requiring quick start and power consumption, and the temperature control type fiber-optic gyroscope is adopted in a general inertial navigation system to improve the temperature performance of the fiber-optic gyroscope.

The structure of the temperature control gyro needs to be carefully designed to ensure that the performance of the gyro is not affected by the addition of the temperature control device, and the existing temperature control gyro has the following problems:

1) the temperature is controlled for too long time;

2) the heat preservation current is too large after the temperature is reached;

3) the performance of the optical fiber ring is reduced after temperature control caused by nonuniform heating.

Disclosure of Invention

The invention aims to solve the problems of overlong temperature reaching time, overlarge heat preservation current and nonuniform heating of an optical fiber ring in the prior art, and provides a temperature control type optical fiber ring module.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the invention discloses a temperature control type optical fiber ring module, which is characterized in that: the magnetic shielding device comprises a magnetic shielding shell, wherein a magnetic shielding framework is arranged in the magnetic shielding shell, an optical fiber ring is embedded in the magnetic shielding framework, and an inner lining plate is embedded in the middle of the magnetic shielding framework; the method is characterized in that: the heating device also comprises a first heat conduction layer, a second heat conduction layer, a heating sheet and a heat insulation layer;

the first heat conduction layer is arranged between the optical fiber ring and the bottom of the magnetic shielding framework;

the second heat conduction layer comprises an inner heat conduction layer, an outer heat conduction layer and a bottom heat conduction layer which are integrally arranged;

the inner heat conduction layer is arranged on the inner side surface of the magnetic shielding framework;

the outer heat conduction layer is arranged on the outer side face of the magnetic shielding framework;

the bottom heat conduction layer is arranged between the bottom of the magnetic shielding framework and the bottom of the magnetic shielding shell;

the heating sheet is positioned outside the outer heat conducting layer; the heating sheet is bonded on the outer heat conduction layer through silicon rubber, and air bubbles cannot exist between the heating sheet and the outer heat conduction layer;

the heat insulation layer comprises an inner heat insulation layer, an outer heat insulation layer and a bottom heat insulation layer which are integrally arranged;

the inner heat insulation layer is arranged outside the inner heat conduction layer;

the outer heat insulation layer is arranged outside the heating sheet and the top surface of the magnetic shielding framework;

the bottom heat insulation layer is arranged between the bottom heat conduction layer and the bottom of the magnetic shielding shell.

Further, the heat insulation plate is also included;

the heat insulation sheet is positioned between the bottom of the inner lining plate and the bottom of the magnetic shielding shell.

Furthermore, the titanium alloy screw also comprises a plurality of titanium alloy screws which are uniformly distributed along the circumferential direction;

the head of the titanium alloy screw is positioned outside the magnetic shielding framework;

the screw part of the titanium alloy screw penetrates through the top surface of the magnetic shielding framework, the inner lining plate, the heat insulation sheet and the magnetic shielding shell in sequence and then is fixedly connected with the external table body;

a heat-shrinkable sleeve is coaxially sleeved outside the screw rod part of the titanium alloy screw;

and an elastic pad and a heat-insulating washer are arranged between the head of the titanium alloy screw and the top surface of the magnetic shielding framework.

Furthermore, the first heat conduction layer and the second heat conduction layer adopt graphite heat conduction sheets or copper foils.

Furthermore, the thermal conductivity of the thermal insulation layer is less than 0.1W/m.K, and the thickness is more than 1 mm.

Further, the heat insulation layer is polyurethane foam.

Further, the heat conductivity coefficient of the heat insulation sheet is less than 1W/m.K.

Further, the heat insulation sheet is a heat insulation material such as an epoxy glass cloth plate.

Further, the thermal conductivity of the heat insulating gasket is less than 1W/m.K.

Further, the heat insulation gasket is a heat insulation material such as an epoxy glass cloth plate.

The invention has the beneficial effects that:

1. the invention arranges a second heat conduction layer outside the optical fiber ring framework, namely an inner heat conduction layer, an outer heat conduction layer and a bottom heat conduction layer which are of an integrated structure are respectively arranged on the inner side surface, the outer side surface and the bottom surface of the optical fiber ring framework; the heating sheet is arranged outside the outer heat conducting layer, when the heating sheet is used for heating, the second heat conducting layer enables the heat of the heating sheet to be rapidly transferred to each part of the magnetic shielding framework, and then the heat is uniformly transferred to the bottom of the optical fiber ring through the first heat conducting layer arranged between the optical fiber ring and the bottom of the magnetic shielding framework; the time from temperature control to temperature is effectively reduced, the optical fiber ring is uniformly heated, and the temperature control performance is improved; then wrap up optic fibre ring, optic fibre ring skeleton, heat-conducting layer and heating plate through the insulating layer is whole, make magnetism shielding skeleton and external environment keep apart from this, make the temperature on the magnetism shielding skeleton more even to reduce system's consumption.

2. In the invention, the heat insulation sheet is arranged between the bottom surface of the inner lining plate and the magnetic shielding shell, thereby isolating the heat transfer between the optical fiber ring and the external environment. Still be fixed in outside stage body through titanium alloy screw with magnetism shielding skeleton, interior welt and heat insulating sheet, from this, when the heating plate heating, optic fibre ring module temperature risees, the temperature trend of optic fibre ring module will outwards transmit, and because the existence of insulating layer and heat insulating sheet this moment, the heat transfer between optic fibre ring module and the outside stage body can only pass through titanium alloy screw transmission, titanium alloy screw has reduced the area of contact of optic fibre ring module and stage body, because titanium alloy screw is low heat conduction material again, consequently further reduced the heat and dispel outward, the temperature control performance has been improved.

3. According to the invention, the heat insulation gasket is arranged between the head of the titanium alloy screw and the top surface of the magnetic shielding framework, so that the heat transfer from the top of the magnetic shielding framework to the head of the titanium alloy screw is reduced, and the temperature control performance is improved again.

Drawings

FIG. 1 is a schematic cross-sectional view of a temperature-controlled fiber optic ring module of the present invention taken along a diameter thereof;

fig. 2 is a partially enlarged schematic view of the bottom of the fiber optic ring to the bottom of the magnetic shield enclosure in the present invention.

In the figure, 1-magnetic shielding shell, 2-magnetic shielding framework, 3-optical fiber ring, 4-inner lining plate, 5-first heat conduction layer, 6-second heat conduction layer, 61-inner heat conduction layer, 62-outer heat conduction layer, 63-bottom heat conduction layer, 7-heating plate, 8-heat insulation layer, 81-inner heat insulation layer, 82-outer heat insulation layer, 83-bottom heat insulation layer, 9-heat insulation sheet, 101-titanium alloy screw, 102-heat shrinkage sleeve, 103-elastic pad and 104-heat insulation gasket.

Detailed Description

To make the objects, advantages and features of the present invention more apparent, a temperature-controlled optical fiber ring module according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following detailed description. It should be noted that: the drawings are in simplified form and are not to precise scale, the intention being solely for the convenience and clarity of illustrating embodiments of the invention; second, the structures shown in the drawings are often part of actual structures.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention discloses a temperature control type optical fiber ring module, which is shown by combining a graph 1 and a graph 2 and comprises a magnetic shielding shell 1, a magnetic shielding framework 2, an optical fiber ring 3, an inner lining plate 4, a first heat conduction layer 5, a second heat conduction layer 6, a heating sheet 7, a heat insulation layer 8, a heat insulation sheet 9 and a plurality of titanium alloy screws 101;

a magnetic shielding framework 2 is arranged in the magnetic shielding shell 1, the optical fiber ring 3 is bonded on the bottom surface of the magnetic shielding framework 2 through epoxy glue, and an inner lining plate 4 is embedded in the middle of the magnetic shielding framework 2; the inner lining plate is used for mounting the coupler and the Y waveguide;

the first heat conduction layer 5 is arranged between the optical fiber ring 3 and the bottom of the magnetic shielding framework 2; the second heat conducting layer 6 comprises an inner heat conducting layer 61, an outer heat conducting layer 62 and a bottom heat conducting layer 63 which are integrally arranged; the inner heat conduction layer 61 is arranged on the inner side surface of the magnetic shield framework 2; the outer heat conduction layer 62 is disposed on the outer side face of the magnetic shield skeleton 2; the bottom heat conduction layer 63 is arranged between the bottom 2 of the magnetic shielding framework and the bottom of the magnetic shielding shell 1;

the heating sheet 7 is adhered to the outside of the outer heat conducting layer 62 through silicon rubber; no air bubbles can exist between the heating fins and the outer heat conducting layer 62;

the heat insulation layer 8 comprises an inner heat insulation layer 81, an outer heat insulation layer 82 and a bottom heat insulation layer 83 which are integrally arranged; the heat insulation layer 8 is made of flexible heat insulation materials, the heat conductivity coefficient of the heat insulation layer 8 is less than 0.1W/m.K, the thickness of the heat insulation layer is more than 1mm, and polyurethane foam can be selected; the inner heat insulation layer 81 is arranged outside the inner heat conduction layer 61; the bottom heat insulating layer 83 is disposed between the bottom heat conducting layer 63 and the bottom of the magnetic shield case 1; the outer heat insulating layer 82 is provided outside the heater chip outer 7 and the top surface of the magnetic shield skeleton 2. The heat insulating sheet 9 is located between the bottom of the inner liner 4 and the bottom of the magnetic shield case 1.

A plurality of titanium alloy screws 101 are uniformly distributed along the circumferential direction of the lining plate; the head of the titanium alloy screw 101 is positioned outside the magnetic shield framework 2; the screw part of the titanium alloy screw 101 sequentially passes through the top surface of the magnetic shielding framework 2, the inner lining plate 4, the heat insulation sheet 9 and the magnetic shielding shell 1 and then is fixedly connected with the external platform body 11; a heat-shrinkable sleeve 102 is coaxially sleeved outside the screw rod part of the titanium alloy screw 101; an elastic washer 103 and a heat insulating washer 104 are arranged between the head of the titanium alloy screw 101 and the top surface of the magnetic shielding framework 2.

The first heat conduction layer 5 and the second heat conduction layer 6 are made of graphite heat conduction sheets or copper foils or other heat conduction materials, and the heat conduction layers are used for enabling heat of the heating sheets to be rapidly transmitted to all parts of the magnetic shielding framework. The thermal conductivity of the heat insulating sheet 9 and the heat insulating gasket 104 is less than 1W/m.K, and a heat insulating material such as an epoxy glass cloth plate can be selected.

The invention relates to a temperature control type optical fiber ring module, which has the following working principle:

the invention provides two heat conducting layers, namely a first heat conducting layer and a second heat conducting layer,

the two heat conduction layers are used for enabling heat generated by the heating sheet to be rapidly and uniformly transferred to the optical fiber ring; the heat insulation layer, the heat insulation sheet, the heat insulation gasket, the titanium alloy screw and the heat shrinkage bush are used for preventing heat of the heating sheet from diffusing outwards, so that the heat balance time of the gyroscope is shortened, and the temperature control power consumption of the system is reduced; the magnetic shielding shell and the magnetic shielding framework are used for isolating the influence of an external magnetic field on the optical fiber ring and improving the zero-position consistency of the gyroscope.