Optical fiber ring testing device
By using step-like foundation and support frame structure in the fiber ring test device to isolate ground vibration, combined with sealing parts and thermal insulation cotton, the problem of vibration impact in the zero-bias performance test of fiber ring is solved, the test accuracy is improved and the test is reduced. Heat loss.
Patent Information
- Application Number
- CN202411334043.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-01-03
AI Technical Summary
The zero-bias performance test of fiber rings is susceptible to ground vibration at room temperature or fixed-point temperature environments, resulting in poor accuracy of measured data.
A fiber-optic ring test device is designed to isolate ground vibration by forming a gap between the foundation and the ground and using a cement-shaped step-like foundation and support frame structure to isolate ground vibration, combining sealing and thermal insulation cotton for sealing and insulation.
It effectively avoids the impact of ground vibration on the optical fiber ring, improves the accuracy of zero-bias performance testing, and reduces heat loss inside the temperature control box through thermal insulation cotton.
Smart Images
Figure CN119245690A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of optical fiber ring testing, and in particular to an optical fiber ring testing device. Background Art
[0002] With the development of a large number of fiber optic gyroscope applications, the comprehensive performance improvement of fiber optic gyroscope has become an important hotspot in current fiber optic gyroscope research. Among them, the stability of fiber optic ring has become one of the important hotspots.
[0003] The stability of the fiber optic gyroscope, that is, the fiber optic gyroscope has good zero bias stability under normal temperature or certain fixed temperature environments. Studies have shown that the zero bias stability of the fiber optic gyroscope is most affected by the stability of optical components, especially the fiber optic ring. Therefore, it is necessary to test the zero bias stability performance of the fiber optic ring at different temperatures before packaging the fiber optic ring.
[0004] At present, when testing the zero bias performance of a fiber optic ring, the main method is to place the main body of the fiber optic ring in a temperature control box, then pull the pigtail of the fiber optic ring out of the temperature control box and connect it to the gyro system circuit board, and then send the collected zero bias data to the host computer, change the temperature in the temperature control box, and observe the zero bias data of the fiber optic ring at different temperatures through the host computer. However, the zero bias performance of the fiber optic ring is greatly affected by vibration, and the temperature control box placed on the ground is often affected by ground vibration sources, such as vibrations from people walking, vibrations from other equipment running in the laboratory, vibrations from compressors, etc., which will affect the zero bias performance test of the fiber optic ring, resulting in poor accuracy of the measured zero bias data. Summary of the invention
[0005] In view of the deficiencies in the prior art, the present invention provides a fiber optic ring testing device, which can avoid the impact of vibrations from the external environment and improve the accuracy of the fiber optic ring zero-bias performance test.
[0006] The present invention is achieved through the following technical solutions:
[0007] A fiber optic ring testing device comprises a temperature control box, a support frame, a foundation, a gyro system circuit board and a host computer, wherein the temperature control box is placed on the ground and has a cavity, one end of the support frame is located in the cavity of the temperature control box, and the other end passes through the temperature control box and is fixedly connected to the foundation, the foundation is arranged on the ground surface, and at least part of the foundation is located below the ground and there is a gap between the foundation and the ground, the fiber optic ring comprises a fiber optic ring body and a pigtail connected to the fiber optic ring body, the fiber optic ring body is placed on the support frame and located in the cavity, the pigtail is connected to the gyro system circuit board, and the gyro system circuit board is connected to the host computer.
[0008] Furthermore, the foundation is integrally formed using cement.
[0009] Furthermore, the foundation is composed of a plurality of square steps distributed in a stepped manner, and the lateral areas of the plurality of square steps gradually decrease from bottom to bottom along the axial direction of the foundation.
[0010] Furthermore, the multiple square steps include, from bottom to top, a first square step, a second square step, a third square step and a fourth square step, the first square step and the second square step are both located below the ground, the third square step passes through the ground, and there is a gap between the third square step and the ground, and the fourth square step is located above the ground and fixedly connected to the support frame.
[0011] Furthermore, the thicknesses of the first step, the second step and the third step gradually increase.
[0012] Furthermore, the distance between the foundation and the ground is 50 mm to 200 mm.
[0013] Furthermore, the distance between the foundation and the ground gradually decreases from bottom to top.
[0014] Furthermore, coarse sand is filled in the gap and close to the position below the ground.
[0015] Furthermore, an opening is provided at the bottom of the temperature control box for the support frame to pass through, and a blocking piece is provided at the opening, and the blocking piece is used to seal the opening.
[0016] Furthermore, the support frame includes a plurality of support rods passing through the openings and a support plate disposed in the temperature control box, and the support plate is fixed to the ends of the support rods for placing the optical fiber ring body.
[0017] Compared with the prior art, the advantages of the present invention are:
[0018] 1. By forming a gap between the foundation and the ground, the vibration generated by the vibration source on the ground is prevented from being transmitted to the optical fiber ring body on the support frame through the ground, thereby affecting the accuracy of the optical fiber ring zero bias performance test.
[0019] 2. An opening is provided at the bottom of the temperature control box for the support frame to pass through, and a sealing piece is provided at the opening to seal the opening, and heat insulation cotton is provided inside the sealing piece to prevent heat loss inside the temperature control box. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of a fiber optic ring testing device;
[0021] Figure 2 for Figure 1 Enlarged view of part A in the middle;
[0022] Figure 3 It is a structural schematic diagram of the temperature control box;
[0023] Figure 4 It is a front view of the optical fiber ring test device;
[0024] Figure 5 for Figure 4 Sectional view along AA;
[0025] Figure 6 for Figure 5 Enlarged view of part B;
[0026] Figure 7 This is an exploded view of the plugging part;
[0027] Figure 8 for Figure 5 Enlarged view of part C.
[0028] 1. Temperature control box; 10. Cavity; 100. Bottom wall; 11. Opening; 2. Support frame; 20. Support rod; 21. Support plate; 3. Foundation; 30. First step; 31. Second step; 32. Third step; 33. Fourth step; 4. Gyro system circuit board; 5. Host computer; 6. Ground; 60. Underground surface; 7. Fiber optic ring body; 70. Pigtail; 8. Sealing piece; 80. Insulation cotton; 81. Base; 810. Receiving groove; 811. Through hole; 812. Extended edge; 82. Cover; 83. Boss; 9. Gap; 90. Coarse sand. DETAILED DESCRIPTION
[0029] The following is a further non-restrictive detailed description of the technical solution of the invention in conjunction with the preferred embodiments and the accompanying drawings. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and cannot be understood as limitations on the present invention.
[0030] like Figure 1-Figure 7As shown, an optical fiber ring test device according to an embodiment of the present invention comprises a temperature control box 1, a support frame 2, a foundation 3, a gyro system circuit board 4 and a host computer 5. The temperature control box 1 is placed on the ground 6 and has a cavity 10. One end of the support frame 2 is located in the cavity 10 of the temperature control box 1, and the other end passes through the temperature control box 1 and is fixedly connected to the foundation 3. The foundation 3 is arranged on the ground surface 60. The foundation 3 is at least partially located below the ground 6 and there is a gap 9 between the foundation 3 and the ground 6. The optical fiber ring comprises an optical fiber ring body 7 and a pigtail 70 connected to the optical fiber ring body 7. The optical fiber ring body 7 is placed on the support frame 2 and is located in the cavity 10. The pigtail 70 is connected to the gyro system circuit board 4, and the gyro system circuit board 4 is connected to the host computer 5. By forming a gap 9 between the foundation 3 and the ground 6, it is prevented that the vibration generated by the vibration source on the ground 6 is transmitted to the optical fiber ring body 7 on the support frame 2 through the ground 6, thereby affecting the accuracy of the optical fiber ring zero bias performance test.
[0031] The foundation 3 is integrally formed of cement, and the foundation 3 is composed of a plurality of square steps distributed in a stepped manner, and the lateral areas of the plurality of square steps gradually decrease from bottom to bottom along the axial direction of the foundation 3. The stepped design of the foundation 3 can improve the seismic isolation effect and has good stability.
[0032] The bottom of the support frame 2 is built in a foundation 3 made of cement.
[0033] The plurality of square steps include a first square step 30, a second square step 31, a third square step 32 and a fourth square step 33 from bottom to top, the first square step 30 and the second square step 31 are both located below the ground 6, the third square step 32 passes through the ground 6, and there is a gap 9 between the third square step 32 and the ground 6, and the fourth square step 33 is located above the ground 6 and fixedly connected to the support frame 2. The number of square steps can be selected according to demand, and the specific number can be no less than three steps.
[0034] The thicknesses of the first square step 30 , the second square step 31 and the third square step 32 gradually increase.
[0035] The distance d between the foundation 3 and the ground 6 is 50 mm to 200 mm.
[0036] The distance d between the foundation 3 and the ground 6 gradually decreases from bottom to top.
[0037] Coarse sand 90 is filled in the gap 9 and near the position below the ground 6 to prevent moisture from the bottom from reaching the top of the ground 6 from the gap 9. The coarse sand 90 can effectively absorb moisture from the bottom and compared with fine sand, the coarse sand 90 has a poor vibration transmission effect, thereby preventing the vibration of the ground 6 from being transmitted to the foundation 3 through the coarse sand 90.
[0038] An opening 11 for the support frame 2 to pass through is provided at the bottom of the temperature control box 1 , and a blocking member 8 is provided at the opening 11 , and the blocking member 8 is used to seal the opening 11 .
[0039] like Figure 7 As shown, the sealing member 8 is provided with heat insulating cotton 80. Specifically, the sealing member 8 includes a base 81 and a cover 82. The base 81 is provided with a receiving groove 810, and the heat insulating cotton 80 is filled in the receiving groove 810. The cover 82 is used to block the opening of the receiving groove 810. It is worth noting that the receiving groove 810 can also be filled with other materials with heat insulating function.
[0040] A boss 83 is protruding from the inner peripheral wall forming the receiving groove 810 , and the cover 82 is detachably connected to the boss 83 , specifically, the cover 82 is fixed on the boss 83 by screws.
[0041] The support frame 2 includes a plurality of support rods 20 passing through the openings 11 and a support plate 21 arranged in the temperature control box 1. The support plate 21 is fixed to the end of the support rod 20 for placing the optical fiber ring body 7. The base 81 is provided with a plurality of through holes 811 for the support rods 20 to pass through.
[0042] like Figure 8 As shown, the base 81 is also formed with an extended edge 812, which is in contact with the bottom wall 100 forming the cavity 10, and the through hole 811 is formed on the extended edge 812. The base 81 is supported by the bottom wall 100, which facilitates the disassembly and installation of the blocking member 8.
[0043] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.
Claims
1. A fiber ring testing device, characterized in that: The invention comprises a temperature control box (1), a support frame (2), a foundation (3), a gyro system circuit board (4) and a host computer (5); the temperature control box (1) is placed on the ground (6) and has a cavity (10); one end of the support frame (2) is located in the cavity (10) of the temperature control box (1), and the other end passes through the temperature control box (1) and is fixedly connected to the foundation (3); the foundation (3) is arranged on the ground surface (60); at least part of the foundation (3) is located below the ground (6) and there is a gap (9) between the foundation (3) and the ground (6); the optical fiber ring comprises an optical fiber ring body (7) and a pigtail (70) connected to the optical fiber ring body (7); the optical fiber ring body (7) is placed on the support frame (2) and is located in the cavity (10); the pigtail (70) is connected to the gyro system circuit board (4); and the gyro system circuit board (4) is connected to the host computer (5).
2. The optical fiber ring testing device according to claim 1, characterized in that: The foundation (3) is integrally formed using cement.
3. The optical fiber ring testing device according to claim 1, characterized in that: The foundation (3) is composed of a plurality of square steps distributed in a stepped manner, and the transverse areas of the plurality of square steps gradually decrease from bottom to bottom along the axial direction of the foundation (3).
4. The optical fiber ring testing device according to claim 3, characterized in that: The plurality of square steps include, from bottom to top, a first square step (30), a second square step (31), a third square step (32) and a fourth square step (33); the first square step (30) and the second square step (31) are both located below the ground (6); the third square step (32) passes through the ground (6); and there is a gap (9) between the third square step (32) and the ground (6); and the fourth square step (33) is located above the ground (6) and is fixedly connected to the support frame (2).
5. The optical fiber ring testing device according to claim 1, characterized in that: The thicknesses of the first square step (30), the second square step (31) and the third square step (32) gradually increase.
6. The optical fiber ring testing device according to claim 1, characterized in that: The distance (d) between the foundation (3) and the ground (6) is 50 mm to 200 mm.
7. The optical fiber ring testing device according to claim 1, characterized in that: The distance (d) between the foundation (3) and the ground (6) gradually decreases from bottom to top.
8. The optical fiber ring testing device according to claim 1, characterized in that: Coarse sand (90) is filled in the gap (9) and at a position close to the ground (6).
9. The optical fiber ring testing device according to claim 1, characterized in that: The bottom of the temperature control box (1) is provided with an opening (11) for the support frame (2) to pass through, and a sealing member (8) is provided at the opening (11), and the sealing member (8) is used to seal the opening (11).
10. The optical fiber ring testing device according to claim 9, characterized in that: The support frame (2) comprises a plurality of support rods (20) passing through the opening (11) and a support plate (21) arranged in the temperature control box (1); the support plate (21) is fixed to the end of the support rod (20) and is used to place the optical fiber ring body (7).