Double-layer magnetic protection device for fiber-optic gyroscope

Abstract

The application discloses a double-layer magnetic protection device for an optical fiber gyroscope, which comprises an optical fiber gyroscope body, an isolation shell, a fixing plate and a clamping mechanism, the optical fiber gyroscope body is installed in the isolation shell, and a protection mechanism for containing the isolation shell is arranged outside the isolation shell, and the device is suitable for the technical field of optical fiber gyroscopes. When the device is used, compared with the prior art, current can be conducted to the optical fiber gyroscope through a conductor, so that an electromagnetic field is generated on the surface of the optical fiber gyroscope, the electromagnetic field can affect the working state of the optical fiber gyroscope during detection, measurement errors of the optical fiber gyroscope can be caused, and normal working conditions can be affected. When the device is used, the current conducted to the optical fiber gyroscope body can be rapidly introduced into the ground, the formation of an electromagnetic field on the optical fiber gyroscope due to the current is avoided, the measurement accuracy of the optical fiber gyroscope is not affected, meanwhile, the isolation lead layer on the isolation shell can better isolate the influence of the external natural environment magnetic field on the optical fiber gyroscope, and the device is simple in use and high in practicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fiber-optic gyroscope, in particular to a double-layer magnetic protection device for fiber-optic gyroscope. BACKGROUND

[0002] The basic principle of fiber-optic gyroscope is to generate a non-reciprocal phase difference based on Sagnac effect, theoretically, the magnetic field environment should not affect the normal work of fiber-optic gyroscope, but only in the ideal case of fiber coil, that is, the polarization state of light in the fiber coil does not change, in actual application, due to the non-ideal fiber coil, such as insufficient uniformity of fiber coil, too large spiral angle in winding, etc., the output of fiber-optic gyroscope will change obviously in the presence of magnetic field, fiber-optic gyroscope is usually used together with high-precision live instrument which needs to measure the level, and the fiber-optic gyroscope is usually installed on the high-precision live instrument or installed on the same working plane with the high-precision live instrument, when the high-precision live instrument works, the current will be conducted to the fiber-optic gyroscope through the conductor, resulting in electromagnetic field on the surface of the fiber-optic gyroscope, the electromagnetic field will affect the working state of the fiber-optic gyroscope when detecting the level, causing errors in the measurement of the fiber-optic gyroscope and affecting the normal working condition, aiming at this problem, the present application designs a double-layer magnetic protection device for fiber-optic gyroscope. SUMMARY

[0003] (I) Technical problems solved

[0004] In view of the deficiencies in the prior art, the present application provides a double-layer magnetic protection device for fiber-optic gyroscope to solve the problems of the prior art proposed in the background.

[0005] (II) Technical solutions

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions: a double-layer magnetic protection device for fiber-optic gyroscope, comprising a fiber-optic gyroscope body, an isolation shell, a fixing plate and a clamping mechanism, the fiber-optic gyroscope body is installed in the isolation shell, the outside of the isolation shell is provided with a protection mechanism for containing the isolation shell, a plurality of damping mechanisms for damping the isolation shell are arranged between the isolation shell and the protection mechanism, the fixing plate is provided with four, four fixing plates are fixedly connected to the protection mechanism, the fixing plate is threadedly connected with a mounting bolt, the right end of the protection mechanism is provided with a grounding mechanism for leading out the current on the isolation shell and the protection mechanism, avoiding the generation of magnetic field by the flow of current to protect, and the protection mechanism is provided with a clamping mechanism for connecting the protection mechanism and the grounding mechanism.

[0007] In order to improve the electromagnetic protection effect of the fiber optic gyroscope body, preferably, the protection mechanism comprises a base, the base is slidably connected with a connecting shell, the connecting shell is slidably connected with a top seat, four trapezoidal sliding blocks are fixedly connected on the base and the top seat, four trapezoidal sliding grooves are formed in the connecting shell, and two trapezoidal sliding blocks on the same side are slidably connected in the trapezoidal sliding groove.

[0008] In order to reduce the vibration of the isolation shell in the protection mechanism, further, the damping mechanism comprises a first rotating seat, the first rotating seat is provided with two, the first rotating seat is fixedly connected on the isolation shell, a push rod is rotatably connected in the first rotating seat, the other end of the push rod is rotatably connected with a second rotating seat, a plurality of damping sliding grooves are formed in the base and the top seat, a damping sliding block is slidably connected in the damping sliding groove, the second rotating seat is fixedly connected with the damping sliding block, and a damper is arranged between the damping sliding block and the damping sliding groove.

[0009] In order to conduct the current on the isolation shell and the protection mechanism to the ground, further, the grounding mechanism comprises a connecting rod, the connecting rod is fixedly connected with a erecting arm, the erecting arm is slidably connected with a lifting rod, the bottom end of the lifting rod is fixedly connected with a grounding spike, the top end of the lifting rod is fixedly connected with a limiting disc, and the top end of the grounding spike is elastically connected with the inner top wall of the erecting arm.

[0010] In order to install and connect the grounding mechanism, the isolation shell and the protection mechanism, as a further scheme of the present scheme, the clamping mechanism comprises a mounting plate, the mounting plate is fixedly connected on the connecting shell, the mounting plate is fixedly connected with a containing bin, the containing bin is installed with a motor, the output end of the motor is fixedly connected with a bidirectional threaded rod through the mounting plate, the bidirectional threaded rod is threadedly connected with two moving plates, and the two moving plates are fixedly connected with two clamping tooth plates.

[0011] In order to leave a wire hole when the fiber optic gyroscope body is normally used, as a further scheme of the present scheme, the rear end of the isolation shell and the rear end of the connecting shell are both provided with a wire reservation hole.

[0012] In order to improve the contact surface of the grounding mechanism, on the basis of the foregoing scheme, the right end of the isolation shell and the right end of the connecting shell are respectively provided with a contact groove and a contact hole.

[0013] In order to observe the working state of the internal fiber optic gyroscope at any time, on the basis of the foregoing scheme, the front end and the left end of the isolation shell and the connecting shell are both provided with an observation hole, and the observation hole is fixedly connected with a transparent observation window.

[0014] In order to further improve the electromagnetic protection effect of the isolation shell, on the basis of the foregoing scheme, the inner wall and the outer wall of the isolation shell are both provided with an isolation lead layer.

[0015] In order to improve the connection strength of the connecting rod and the erecting arm, the connecting rod is welded on the erecting arm on the basis of the foregoing scheme.

[0016] (III) Beneficial Effects

[0017] Compared with the known prior art, the application provides a double-layer magnetic protection device for an optical fiber gyroscope, which has the following beneficial effects:

[0018] In the application, the optical fiber gyroscope body is conveniently installed through the isolation shell, the isolation shell is conveniently held and the vibration of the isolation shell is reduced through the cooperation of the protection mechanism and the damping mechanism, the device is conveniently installed and fixed at a suitable use position through the cooperation of the fixing plate and the mounting bolt, and the current is conducted into the ground after the grounding mechanism is connected and installed with the isolation shell and the protection mechanism, compared with the prior art, the current is conducted to the optical fiber gyroscope through the conductor, an electromagnetic field is generated on the surface of the optical fiber gyroscope, the electromagnetic field affects the working state of the optical fiber gyroscope during detection, measurement errors of the optical fiber gyroscope occur, and normal working conditions are affected, the current conducted to the optical fiber gyroscope body can be rapidly conducted into the ground during use of the device, the formation of the electromagnetic field on the optical fiber gyroscope by the current is avoided, the measurement accuracy of the optical fiber gyroscope is not affected, the isolation lead layer on the isolation shell can also better isolate the influence of the external natural environment magnetic field on the optical fiber gyroscope, and the device is relatively simple during use and has relatively high practicability. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0020] Figure 1 It is a schematic diagram of the partial cross-section structure of the application;

[0021] Figure 2 It is a schematic diagram of the overall structure of the application;

[0022] Figure 3 It is a schematic diagram of the partial cross-section structure of the protection mechanism in the application;

[0023] Figure 4 It is a schematic diagram of the structure of the damping mechanism in the application;

[0024] Figure 5 It is a schematic diagram of the partial cross-section structure of the grounding mechanism in the application;

[0025] Figure 6 It is a partial cross-sectional perspective view of the clamping mechanism in the application.

[0026] The reference signs in the figure respectively represent: 1, fiber optic gyroscope body; 2, isolation shell; 3, protection mechanism; 4, damping mechanism; 5, fixed plate; 6, mounting bolt; 7, grounding mechanism; 8, clamping mechanism; 9, transparent observation window; 301, base; 302, connecting shell; 303, top seat; 304, trapezoidal sliding block; 401, first rotating seat; 402, push rod; 403, second rotating seat; 404, damping sliding block; 405, damper; 701, connecting rod; 702, erecting arm; 703, lifting rod; 704, grounding spike; 705, limiting disc; 801, mounting plate; 802, containing bin; 803, motor; 804, bidirectional threaded rod; 805, moving plate; 806, clamping tooth plate. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0028] Embodiment 1

[0029] Please refer to Figure 1 Figure 2 A double-layer magnetic protection device for a fiber optic gyroscope includes a fiber optic gyroscope body 1, an isolation shell 2, a fixed plate 5 and a clamping mechanism 8, the fiber optic gyroscope body 1 is installed in the isolation shell 2, the outside of the isolation shell 2 is provided with a protection mechanism 3 for containing the isolation shell 2, a plurality of damping mechanisms 4 for damping the isolation shell 2 are arranged between the isolation shell 2 and the protection mechanism 3, four fixed plates 5 are arranged, the four fixed plates 5 are fixedly connected to the protection mechanism 3, mounting bolts 6 are threadedly connected to the fixed plates 5, a grounding mechanism 7 for leading out current on the isolation shell 2 and the protection mechanism 3 to avoid the generation of a magnetic field by the flow of current and thus to protect is arranged at the right end of the protection mechanism 3, and the clamping mechanism 8 for connecting the protection mechanism 3 and the grounding mechanism 7 is arranged in the protection mechanism 3.

[0030] Please refer to Figure 3 The protection mechanism 3 includes a base 301, the connecting shell 302 is slidably connected to the base 301, the top seat 303 is slidably connected to the connecting shell 302, four trapezoidal sliding blocks 304 are fixedly connected to the base 301 and the top seat 303, four trapezoidal sliding grooves are formed in the connecting shell 302, and two trapezoidal sliding blocks 304 located on the same side are slidably connected in the trapezoidal sliding grooves, so as to improve the electromagnetic protection effect on the fiber optic gyroscope body 1.

[0031] Please refer to Figure 4 , the damping mechanism 4 includes the first rotating seat 401, the first rotating seat 401 is provided with two, two first rotating seats 401 are fixedly connected on the isolation shell 2, the push rod 402 is rotatably connected in the first rotating seat 401, the other end of the push rod 402 is rotatably connected with the second rotating seat 403, a plurality of damping sliding grooves are formed on the base 301 and the top seat 303, the damping sliding block 404 is slidably connected in the damping sliding groove, the second rotating seat 403 is fixedly connected with the damping sliding block 404, the damping sliding block 404 and the damping sliding groove are provided with the shock absorber 405, so as to facilitate reducing the vibration of the isolation shell 2 in the protection mechanism 3.

[0032] Please refer to Figure 5 , the grounding mechanism 7 includes the connecting rod 701, the connecting rod 701 is fixedly connected with the erecting arm 702, the erecting arm 702 is slidably connected with the lifting rod 703, the bottom end of the lifting rod 703 is fixedly connected with the grounding thorn 704, the top end of the lifting rod 703 is fixedly connected with the limiting disc 705, the top end of the grounding thorn 704 and the inner top wall of the erecting arm 702 are elastically connected, so as to facilitate the conduction of the current on the isolation shell 2 and the protection mechanism 3 to the ground.

[0033] Please refer to Figure 6 , the clamping mechanism 8 includes the mounting plate 801, the mounting plate 801 is fixedly connected on the connecting shell 302, the mounting plate 801 is fixedly connected with the containing bin 802, the motor 803 is installed in the containing bin 802, the output end of the motor 803 is fixedly connected with the bidirectional threaded rod 804 through the mounting plate 801, two moving plates 805 are threadedly connected on the bidirectional threaded rod 804, two clamping toothed plates 806 are fixedly connected on the moving plates 805, so as to facilitate the installation and connection of the grounding mechanism 7, the isolation shell 2 and the protection mechanism 3.

[0034] It should be further explained that the rear end of the isolation shell 2 and the rear end of the connecting shell 302 are both provided with wire reservation holes, so as to leave a line hole for the normal working use of the fiber-optic gyroscope body 1, the right end of the isolation shell 2 and the right end of the connecting shell 302 are respectively provided with a contact groove and a contact port, so as to improve the contact surface of the grounding mechanism 7, the front end and the left end of the isolation shell 2 and the connecting shell 302 are both provided with observation ports, the transparent observation window 9 is fixedly connected in the observation port, so as to observe the working state of the internal fiber-optic gyroscope at any time, the inner wall and the outer wall of the isolation shell 2 are both provided with isolation lead layers, so as to further improve the electromagnetic protection effect of the isolation shell 2, the connecting rod 701 is welded on the erecting arm 702, so as to improve the connection strength of the connecting rod 701 and the erecting arm 702.

[0035] The motor 803 in the embodiment is a conventional device known to those skilled in the art and can be selected according to actual needs or customized, and the present application only uses the motor 803 without improving the structure and function thereof. The setting mode, installation mode and electrical connection mode of the motor 803 can be debugged according to the requirements of the instruction manual, and details are not described herein again. Meanwhile, the motor 803 is provided with a control switch, and the installation position of the control switch can be selected according to actual use requirements and is convenient for operators to operate and control. Meanwhile, the motor 803 needs to be connected with a forward and reverse rotation circuit before use for forward and reverse rotation operation. According to the patent with the patent number CN109889124A, the forward and reverse rotation operation of the motor 803 is a known technology to those skilled in the art, and the technology is very mature and can be realized.

[0036] Embodiment 2

[0037] The embodiment 2 of the present application is further described based on the embodiment 1.

[0038] First, the motor 803 is installed according to the instruction manual and is appropriately debugged according to actual needs. When the double-layer magnetic protection device for the optical fiber gyroscope is used, the optical fiber gyroscope body 1 is installed in the isolation shell 2, the circuit line of the optical fiber gyroscope is extended to the outside through the wire reserved holes on the isolation shell 2 and the connecting shell 302 for connection, the connecting rod 701 is inserted into the contact groove through the contact port, the motor 803 is started, the motor 803 drives the bidirectional threaded rod 804 to rotate, the moving plate 805 threaded on the bidirectional threaded rod 804 moves to the center, the moving plate 805 drives the clamping jaw plate 806 to move to the center, the connecting rod 701 is clamped tightly, four threaded holes are drilled at the appropriate installation position, the holes on the fixed plate 5 are aligned with the threaded holes and screwed into the fixed bolts, the device is fixed at the appropriate use position, the limiting disc 705 is sent away, and the grounding spike 704 is in a compressed state with the spring at the elastic connection part of the erecting arm 702. When the limiting disc 705 is sent away, the spring loses the limitation and rebounds downward to push the grounding spike 704, the grounding spike 704 moves downward to penetrate into the ground, the grounding spike 704 drives the lifting rod 703 to slide downward on the erecting arm 702, the grounding spike 704 penetrates into the ground to complete grounding. The base 301, the connecting shell 302 and the top seat 303 in the device are made of special rubber material and have good insulation and protection effects. When the isolation shell 2 inside is electrified, the current is conducted through the isolation shell 2 and the connecting rod 701, conducted into the connecting rod 701, conducted through the connecting rod 701, the erecting arm 702 and the lifting rod 703, and finally conducted into the grounding spike 704 to the ground to complete discharge and avoid the current flowing on the isolation shell 2 to form an electromagnetic field to affect the normal work of the optical fiber gyroscope body 1.

[0039] When the vibration occurs, the fiber-optic gyroscope body 1 is installed in the isolation shell 2, the isolation shell 2 is a closed environment, and the fiber-optic gyroscope body 1 is fully filled in the isolation shell 2 without a gap to shake, and the only opening on the isolation shell 2 is only for the wire of the fiber-optic gyroscope body 1 to pass through, so when the vibration occurs, the fiber-optic gyroscope body 1 shakes up and down with the isolation shell 2 in the connecting shell 302, when the isolation shell 2 moves up and down, the first rotating seat 401 is pushed to move up and down, the first rotating seat 401 pushes the push rod 402 to rotate, the push rod 402 pushes the second rotating seat 403, and the second rotating seat 403 pushes the shock-absorbing sliding block 404 to slide in the shock-absorbing sliding groove, the shock absorber 405 used in the present application is a common oil pump type shock absorber 405 purchased on the market, and its working principle is to absorb kinetic energy when the internal oil passes through a space of a certain size, thereby achieving the effect of reducing vibration, the shock-absorbing sliding block 404 pushes the shock absorber 405 to contract and release, absorbs kinetic energy and thereby absorbs and offsets the kinetic energy generated by the vibration, the isolation shell 2 is specially set to be made of metal, on the one hand, considering that metal has strong rigidity and can provide better protection for the fiber-optic gyroscope body 1, on the other hand, considering that the heat generated by the fiber-optic gyroscope during work can be quickly dissipated through the thermal conductivity of metal, so that the fiber-optic gyroscope can work better, the isolation lead layer is set on the inner wall and the outer wall of the isolation shell 2, considering that in addition to the current generating electromagnetic field, the magnetic field of the natural environment also has a certain influence on the work of the fiber-optic gyroscope body 1, the isolation lead layer can better isolate the external magnetic field, and further improve the reliability of the work of the fiber-optic gyroscope.

[0040] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A double-layer magnetic protection device for fiber-optic gyroscope, comprising a fiber-optic gyroscope body (1), characterized in that, Also include: The optical fiber gyroscope body (1) is installed in the isolation shell (2), the outside of the isolation shell (2) is provided with a protection mechanism (3) for containing the isolation shell (2), a plurality of damping mechanisms (4) for damping the isolation shell (2) are arranged between the isolation shell (2) and the protection mechanism (3); The fixed plate (5) is provided with four, four fixed plates (5) are fixedly connected on the protection mechanism (3), the mounting bolt (6) is threadedly connected on the fixed plate (5), the grounding mechanism (7) for leading out the current on the isolation shell (2) and the protection mechanism (3) is arranged at the right end of the protection mechanism (3), which avoids the generation of magnetic field by current flow and thus protects; The clamping mechanism (8) is arranged in the protection mechanism (3) for connecting the protection mechanism (3) and the grounding mechanism (7); The damping mechanism (4) comprises a first rotating seat (401), the first rotating seat (401) is provided with two, the first rotating seat (401) is fixedly connected on the isolation shell (2), the push rod (402) is rotatably connected in the first rotating seat (401), the second rotating seat (403) is rotatably connected at the other end of the push rod (402), a plurality of damping sliding grooves are formed on the base (301) and the top seat (303), the damping sliding block (404) is slidably connected in the damping sliding groove, the second rotating seat (403) is fixedly connected with the damping sliding block (404), and the damper (405) is arranged between the damping sliding block (404) and the damping sliding groove; The grounding mechanism (7) comprises a connecting rod (701), the connecting rod (701) is fixedly connected with a spanning arm (702), the spanning arm (702) is slidably connected with a lifting rod (703), the grounding spike (704) is fixedly connected at the bottom end of the lifting rod (703), the limiting disc (705) is fixedly connected at the top end of the lifting rod (703), and the top end of the grounding spike (704) is elastically connected with the inner top wall of the spanning arm (702).

2. The double-layer magnetic shielding device for a fiber-optic gyroscope according to claim 1, characterized in that, The protection mechanism (3) comprises a base (301), the connecting shell (302) is slidably connected on the base (301), the top seat (303) is slidably connected on the connecting shell (302), four trapezoidal sliding blocks (304) are fixedly connected on the base (301) and the top seat (303), four trapezoidal sliding grooves are formed on the connecting shell (302), and two trapezoidal sliding blocks (304) on the same side are slidably connected in the trapezoidal sliding groove.

3. The double-layer magnetic shielding device for fiber optic gyroscope according to claim 2, characterized in that, The clamping mechanism (8) comprises a mounting plate (801), the mounting plate (801) is fixedly connected on the connecting shell (302), the mounting plate (801) is fixedly connected with a containing bin (802), the motor (803) is installed in the containing bin (802), the output end of the motor (803) is fixedly connected with a bidirectional threaded rod (804) penetrating through the mounting plate (801), two moving plates (805) are threadedly connected on the bidirectional threaded rod (804), and two clamping tooth plates (806) are fixedly connected on the moving plates (805).

4. The double-layer magnetic shielding device for fiber optic gyroscope according to claim 3, characterized in that, The rear end of the isolation shell (2) and the rear end of the connecting shell (302) are both provided with a wire reservation hole.

5. The double-layer magnetic shielding device for fiber-optic gyroscope according to claim 4, characterized in that, The right end of the isolation shell (2) and the right end of the connecting shell (302) are respectively provided with a contact groove and a contact port.

6. The double-layer magnetic shielding device for fiber optic gyroscope according to claim 5, wherein, The front end and the left end of the isolation shell (2) and the connecting shell (302) are both provided with an observation port, and the observation port is fixedly connected with a transparent observation window (9).

7. The double-layer magnetic shielding device for fiber-optic gyroscope according to claim 6, characterized in that, The inner wall and the outer wall of the isolation shell (2) are both provided with an isolation lead layer.

8. The double-layer magnetic shielding device for a fiber-optic gyroscope according to claim 7, characterized in that, The connecting rod (701) is welded on the erecting arm (702).

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