Heat preservation device for optical fiber gyroscope

Abstract

The utility model provides a thermal insulation device for an optical fiber gyroscope, which comprises a mounting base, an optical fiber gyroscope arranged on the mounting base and a double-layer shell structure arranged on the mounting base on the outer side of the optical fiber gyroscope, and the double-layer shell structure comprises an outer shell and an inner shell arranged in the outer shell; wherein the inner shell comprises a fixed inner shell of which one end is provided with an opening, and a movable inner shell which is connected to the fixed inner shell in a sliding manner and is used for opening and closing the opening; a ventilation fan and a temperature sensor are installed in the fixed inner shell, at least one air circulation piece is installed on each of the fixed inner shell and the movable inner shell, and at least one pair of ventilation holes is formed in the side wall of the outer shell. According to the heat preservation device, on the inner shell structure, a selective air circulation structure is achieved through sliding connection of the fixed inner shell and the movable inner shell, so that the heat preservation device is suitable for temperature regulation and control within different temperature difference ranges, and the temperature regulation mode is more flexible.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical fiber gyroscopes, and in particular relates to a heat preservation device for optical fiber gyroscopes. Background Art

[0002] Fiber optic gyroscopes are widely used in important fields such as aviation, aerospace, navigation, and weapons because of their wide accuracy range, no moving parts, small size, light weight, and long life. Fiber optic gyroscopes are an optical gyroscope based on the Sagnac effect. It consists of a light source, a photodetector, a coupler, a Y waveguide, a fiber optic ring, and various electronic components. When the ambient temperature changes, the performance of the fiber optic gyroscope components changes, affecting the output accuracy of the fiber optic gyroscope.

[0003] The fiber optic gyroscope heat preservation device in the prior art is complex in structure, high in cost, and has a relatively simple temperature adjustment method. Therefore, it is necessary to design a heat preservation device for a fiber optic gyroscope that is more flexible in application and convenient in operation. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a heat preservation device for a fiber optic gyroscope to achieve more flexible temperature control.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a heat preservation device for a fiber optic gyroscope, comprising a mounting base, a fiber optic gyroscope arranged on the mounting base, and a double-layer shell structure arranged on the mounting base outside the fiber optic gyroscope, the double-layer shell structure comprising an outer shell and an inner shell arranged inside the outer shell; wherein the inner shell comprises a fixed inner shell with an opening at one end, and a movable inner shell slidably connected to the fixed inner shell for opening and closing the opening; a ventilation fan and a temperature sensor are installed inside the fixed inner shell, at least one openable and closable air circulation component is installed on both the fixed inner shell and the movable inner shell, and at least one pair of air vents is opened on the side wall of the outer shell.

[0006] The utility model is further configured such that the movable inner shell is slidably connected to the fixed inner shell through a pair of relatively arranged movable components, each of the movable components includes a rotating shaft whose two ends are respectively connected to the outer side walls on the same side of the fixed inner shell and the movable inner shell, a vertical rack arranged in the fixed inner shell, a gear meshing with the vertical rack, and an electric push rod for pushing the vertical rack to move up and down, and one end of the rotating shaft extends into the fixed inner shell and is connected to the gear.

[0007] The utility model is further configured such that the rotating shaft includes a straight rod portion and a first connecting column and a second connecting column vertically arranged at both ends of the straight rod portion, the side walls of the fixed inner shell and the movable inner shell are respectively provided with through holes matching the first connecting column and the second connecting column, and the gear sleeve is arranged on the outer side wall of the first connecting column extending into the interior of the fixed inner shell.

[0008] The utility model is further configured that a pair of rack limiting plates for limiting the up and down sliding of the vertical rack are also provided on the inner side wall of the fixed inner shell, and a vertical sliding groove matching the vertical rack is opened on one side of the rack limiting plate; the vertical side surface of the non-tooth side of the vertical rack is slidably connected to the vertical sliding groove.

[0009] The utility model is further configured such that the vertical rack is also provided with a rack fixing plate for connecting to the telescopic end of the electric push rod, and the rack fixing plate connects the telescopic end of the electric push rod to the vertical rack through a fixing piece or welding, so as to realize the telescopic movement of the electric push rod and push the vertical rack to move in the vertical direction.

[0010] The utility model is further configured such that the air holes arranged on the outer shell are located close to the air circulation parts on the fixed inner shell and the movable inner shell to accelerate the air circulation inside and outside the heat preservation device.

[0011] The utility model is further configured that a storage battery is also installed on the installation base, and the air circulation member, the ventilation fan, the temperature sensor and the electric push rod are electrically connected to the storage battery.

[0012] The utility model is further configured that the openable and closable air circulation member is used for air circulation on both sides of the inner shell, and the air circulation member is selected from an air valve or a breathable plate with through holes distributed thereon.

[0013] The utility model is further configured that the inner wall of the air vent on the shell is also equipped with a dustproof net.

[0014] The utility model is further configured that the inner side walls of the outer shell, the fixed inner shell and the movable inner shell are all provided with a heat insulation layer.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the heat preservation device designed in the utility model realizes the heat preservation effect of the fiber optic gyroscope through a double-layer shell structure with a heat insulation layer; at the same time, on the inner shell structure, a selective air circulation structure is realized through the sliding connection of the fixed inner shell and the movable inner shell, which is suitable for temperature control in different temperature difference ranges, and the temperature adjustment method is more flexible to realize the heat preservation function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a side view of the heat preservation device of the utility model;

[0017] Figure 2 It is an overall vertical cross-sectional view of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the fixed inner shell described in the utility model;

[0019] Figure 4 It is a schematic diagram of the structure inside the inner shell of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the initial positions of the fixed inner shell and the movable inner shell of the utility model.

[0021] Figure 6 A schematic structural diagram of the movable inner shell in the present invention moving to open the opening 310 .

[0022] Figure 7 It is a structural schematic diagram of the rotary shaft described in the utility model.

[0023] Figure 8 It is a structural schematic diagram of the rack described in the utility model.

[0024] Among them, 100, mounting base, 110, fiber optic gyroscope, 120, battery, 200, outer shell, 210, air vent; 300, fixed inner shell, 310, opening, 320, ventilation fan, 330, temperature sensor, 340, air circulation part, 350, thermoelectric cooler; 400, movable inner shell, 500, movable component, 510, rotating shaft, 511, straight rod part, 512, first connecting column, 513, second connecting column, 520, vertical rack, 530, gear, 540, electric push rod, 550, rack limit plate, 551, vertical slide groove, 560, rack fixing plate. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "axial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present invention.

[0027] See also Figures 1 to 6 The utility model provides a heat preservation device for a fiber optic gyroscope, comprising a mounting base 100, a fiber optic gyroscope 110 arranged on the mounting base 100, and a double-layer shell structure arranged on the mounting base 100 outside the fiber optic gyroscope 110, wherein the double-layer shell structure comprises an outer shell 200 and an inner shell arranged inside the outer shell 200; wherein the inner shell comprises a fixed inner shell 300 with an opening 310 at one end, and a movable inner shell 400 slidably connected to the fixed inner shell 300 for opening and closing the opening 310, a ventilation fan 320 and a temperature sensor 330 are installed inside the fixed inner shell 300, and at least one openable and closable air circulation member 340 is installed on each of the fixed inner shell 300 and the movable inner shell 400; and at least one pair of air holes 210 are opened on the side wall of the outer shell 200.

[0028] Specifically, in the present embodiment, the movable inner shell 400 slides through a pair of relatively arranged movable components 500, and each movable component 500 includes a rotating shaft 510 whose two ends are respectively connected to the outer side walls of the movable inner shell 400 and the fixed inner shell 300 on the same side, a vertical rack 520 arranged inside the fixed inner shell 300, and a gear 530 meshing with the vertical rack 520, and an electric push rod 540 for pushing the vertical rack 520 to move up and down in the vertical direction. One end of the rotating shaft 510 is connected to the fixed inner shell 300, extends into the interior of the fixed inner shell 300 and is connected to the gear 530.

[0029] A battery 120 is also installed on the mounting base 100 , and the air circulation member 340 , the temperature sensor 330 , the ventilation fan 320 and the electric push rod 540 are electrically connected to the battery 120 .

[0030] When the heat preservation device of the utility model is in use, the temperature sensor 330 monitors the ambient temperature of the fiber optic gyroscope 110 in real time, and flexibly performs different temperature adjustment modes according to the difference between the measured temperature and the target ambient temperature value and the difference between the threshold value set in advance:

[0031] (1) When the ambient temperature of the inner shell in which the fiber optic gyroscope is located is too high, that is, the temperature difference is greater than the threshold value, the electric push rod 540 is turned on to push the vertical rack 520 to move in the vertical direction, thereby driving the gear 530 to rotate, converting the linear motion into rotational motion, and further through the rotation of the gear 530, the movable inner shell 400 is driven to slide through the rotating shaft 510, opening the opening 310 of the fixed inner shell 300, and the heat in the inner shell cavity is quickly convected through the air holes 210 on the outer shell 200, and the ventilation fan 320 is used to make the temperature in the inner shell more uniform, thereby achieving rapid cooling.

[0032] (2) When the temperature difference is less than the set threshold, that is, the temperature is slightly higher; at this time, only by opening the air circulation member 340, the heat in the inner shell cavity is convected through the air vents 210, and the ventilation fan 320 is turned on at the same time to make the inner cavity temperature more consistent, accelerate air convection, and achieve cooling.

[0033] To further optimize the above technical solution, in a specific embodiment, the vent holes 210 provided on the outer shell 200 are located close to the air circulation members 340 on the fixed inner shell 300 and the movable inner shell 400. This arrangement accelerates the air circulation inside and outside the heat preservation device.

[0034] In one specific embodiment, the air circulation member 340 is an openable and closable air valve.

[0035] In one specific embodiment, the air circulation member 340 is a breathable plate with distributed through holes, which is used for gas circulation between the inner and outer sides of the inner shell.

[0036] To further optimize the above technical solution, in a specific embodiment, a pair of rack limit plates 550 for limiting the vertical rack 520 to slide up and down are further provided on the inner side wall of the fixed inner shell 300, and a vertical slide groove 551 matching the vertical rack 520 is provided on one side of the rack limit plate 550, and the non-tooth side vertical side of the vertical rack 520 is slidably connected to the vertical slide groove 551. This arrangement can make the vertical rack 520 slide more stably in the vertical direction.

[0037] To further optimize the above technical solution, in a specific implementation manner, Figure 7 As shown, the vertical rack 520 is also provided with a rack fixing plate 560 for connecting to the telescopic end of the electric push rod 540. The rack fixing plate 560 connects the telescopic end of the electric push rod 540 to the vertical rack 520 through fixing parts or welding, so as to realize the telescopic movement of the electric push rod 540 and push the vertical rack 520 to move in the vertical direction.

[0038] To further optimize the above technical solution, in a specific implementation manner, Figure 8 As shown, the rotating shaft 510 includes a straight rod portion 511 and a first connecting column 512 and a second connecting column 513 vertically arranged at both ends of the straight rod portion 511, and the side walls of the fixed inner shell 300 and the movable inner shell 400 are respectively provided with through holes matching the first connecting column 512 and the second connecting column 513, and the gear 530 is sleeved on the outer wall of the first connecting column 512 extending into the interior of the fixed inner shell 300.

[0039] To further optimize the above technical solution, in a specific embodiment, a dustproof net is also installed on the inner wall of the air vent 210 on the outer shell 200, and the inner walls of the outer shell 200, the fixed inner shell 300 and the movable inner shell 400 are all provided with a heat insulation layer; so as to better achieve the dustproof and heat-insulating effects.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat preservation device for a fiber optic gyroscope, characterized in that: It comprises a mounting base, a fiber optic gyroscope arranged on the mounting base, and a double-layer shell structure arranged on the mounting base outside the fiber optic gyroscope, wherein the double-layer shell structure comprises an outer shell and an inner shell arranged inside the outer shell; wherein the inner shell comprises a fixed inner shell with an opening at one end, and a movable inner shell slidably connected to the fixed inner shell for opening and closing the opening; a ventilation fan and a temperature sensor are installed inside the fixed inner shell, and at least one openable and closable air circulation component is installed on both the fixed inner shell and the movable inner shell, and at least one pair of air vents is opened on the side wall of the outer shell.

2. A heat preservation device for a fiber optic gyroscope according to claim 1, characterized in that: The movable inner shell is slidably connected to the fixed inner shell through a pair of relatively arranged movable components, each of the movable components includes a rotating shaft with two ends respectively connected to the outer side walls on the same side of the fixed inner shell and the movable inner shell, a vertical rack arranged in the fixed inner shell, a gear meshing with the vertical rack, and an electric push rod for pushing the vertical rack to move up and down, and one end of the rotating shaft extends into the fixed inner shell and is connected to the gear.

3. A heat preservation device for a fiber optic gyroscope according to claim 2, characterized in that: The rotating shaft includes a straight rod portion and a first connecting column and a second connecting column vertically arranged at both ends of the straight rod portion. The side walls of the fixed inner shell and the movable inner shell are respectively provided with through holes matching the first connecting column and the second connecting column. The gear sleeve is arranged on the outer side wall of the first connecting column extending into the interior of the fixed inner shell.

4. A heat preservation device for a fiber optic gyroscope according to claim 2, characterized in that: A pair of rack limiting plates for limiting the vertical rack to slide up and down are also provided on the inner side wall of the fixed inner shell, and a vertical sliding groove matching the vertical rack is opened on one side of the rack limiting plate.

5. A heat preservation device for a fiber optic gyroscope according to claim 2, characterized in that: The vertical rack is also provided with a rack fixing plate for connecting to the telescopic end of the electric push rod. The rack fixing plate connects the telescopic end of the electric push rod to the vertical rack through a fixing piece or welding.

6. A heat preservation device for a fiber optic gyroscope according to claim 2, characterized in that: A storage battery is also installed on the installation base, and the air circulation member, the ventilation fan, the temperature sensor and the electric push rod are electrically connected to the storage battery.

7. A heat preservation device for a fiber optic gyroscope according to claim 1, characterized in that: The vent holes arranged on the outer shell are located close to the air circulation parts on the fixed inner shell and the movable inner shell.

8. The heat preservation device for fiber optic gyroscope according to claim 1, characterized in that: The openable and closable air circulation member is used for air circulation between the inner and outer sides of the inner shell, and the air circulation member is selected from an air valve or a breathable plate with through holes distributed thereon.

9. A heat preservation device for a fiber optic gyroscope according to claim 1, characterized in that: A dustproof net is installed on the inner wall of the air vent on the outer shell, and a heat insulation layer is arranged on the inner side walls of the outer shell, the fixed inner shell and the movable inner shell.

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