Constant-angle acceleration loading device for fiber-optic gyroscope detection

Abstract

The invention relates to the technical field of fiber-optic gyroscope detection, and discloses a fixed-angle acceleration loading device for fiber-optic gyroscope detection, the fixed-angle acceleration loading device comprises a simple pendulum mechanism, a pendulum stopping pad and a simple pendulum energy storage and release mechanism, the simple pendulum mechanism comprises a swing arm, the swing arm is provided with a mounting seat for mounting a to-be-detected fiber-optic gyroscope, and the mounting seat is provided with a mounting hole; the simple pendulum energy storage and release mechanism is used for keeping the swing arm at an energy storage position and can instantly release the swing arm to enable the swing arm to freely swing under the action of gravity, and the swing stopping pad is arranged on a free swing path of the swing arm. The fixed angular acceleration loading device for detecting the fiber-optic gyroscope has the advantages of simple structure, convenience in operation and capability of detecting the angular acceleration endurance capability and the angular acceleration measurement precision of the fiber-optic gyroscope.

Description

Technical Field

[0001] The invention relates to the technical field of fiber optic gyroscope detection, and in particular to a fixed-angle acceleration loading device for fiber optic gyroscope detection. Background Art

[0002] Fiber optic gyroscope is an angular velocity measurement sensor. As an angular velocity sensitive device, it outputs angular velocity by integrating angular acceleration. For high-precision fiber optic gyroscopes, the higher the accuracy, the smaller the measurement range. Taking a fiber optic gyroscope with a zero-bias stability accuracy of 0.01° / h as an example, the angular velocity range of a single-stage stripe is about 90° / s, and the angular velocity range in normal use is generally about ±500° / s. Therefore, the angular velocity measurement range can be increased by expanding the stripes. However, when the fiber optic gyroscope detects a large angular acceleration impact, it may exceed its monitoring capability in a short period of time, resulting in abnormal angular velocity data output by the fiber optic gyroscope. Therefore, it is necessary to quantify the ability of the fiber optic gyroscope to withstand large angular acceleration impacts and to test and evaluate the performance of the fiber optic gyroscope when it is subjected to large angular acceleration impacts.

[0003] For a fiber optic gyroscope with a zero bias stability accuracy of 0.01° / h, the magnitude of its angular acceleration shock is generally about 10^5° / s 2 The existing conventional detection equipment cannot provide such a large angular acceleration input to the fiber optic gyroscope, so it is necessary to design a fixed-angle acceleration loading device for fiber optic gyroscope detection. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide a fixed-angle acceleration loading device for fiber optic gyroscope detection which has a simple structure, is easy to operate, and can perform angular acceleration tolerance detection and angular acceleration measurement accuracy detection on the fiber optic gyroscope.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A fixed-angle acceleration loading device for fiber optic gyroscope detection comprises a simple pendulum mechanism, a swing-stop pad and a simple pendulum energy storage and release mechanism, wherein the simple pendulum mechanism comprises a swing arm, and the swing arm is provided with a mounting seat for mounting the fiber optic gyroscope to be tested, the simple pendulum energy storage and release mechanism is used to keep the swing arm in an energy storage position, and can instantly release the swing arm to make it swing freely under the action of gravity, and the swing-stop pad is arranged on the free swing path of the swing arm.

[0006] As a further improvement of the above technical solution: The single-oscillating mechanism further comprises a rotating shaft, the swing arm comprises a first swing arm and a second swing arm, the first swing arm and the second swing arm are vertically arranged, the first swing arm is hinged to the rotating shaft, and the mounting seat is mounted on the second swing arm.

[0007] The anti-sway pad is arranged on the free downward swing path of the second swing arm. When the second swing arm contacts the anti-sway pad, the first swing arm is perpendicular to the contact plane between the second swing arm and the anti-sway pad, and the contact plane is located on a horizontal plane.

[0008] The single-oscillating mechanism further comprises a rotating shaft and a rotating shaft frame, wherein the rotating shaft is mounted on the rotating shaft frame, the upper end of the swing arm is hinged to the rotating shaft frame, and the mounting seat is fixedly mounted on the lower end of the swing arm.

[0009] The anti-sway pad is arranged at the lower part of the rotating shaft frame, and when the swing arm contacts the anti-sway pad, the swing arm is perpendicular to the horizontal plane.

[0010] The single pendulum energy storage and release mechanism includes a slide rail, a slider, a main support rod and a support block. The slider is slidably arranged on the slide rail, the bottom end of the main support rod is fixed on the slider, and the support block is sleeved on the main support rod, and its height position on the main support rod is adjusted and fixed by a set screw.

[0011] The sliding block is provided with a locking piece for locking with the sliding rail.

[0012] The mounting seat is provided with a roller or a rolling ball for cooperating with the support block.

[0013] The main support rod is provided with a height scale for measuring the height position of the support block.

[0014] An inclinometer for measuring the angle of the swing arm is arranged on the swing arm.

[0015] The single pendulum energy storage and release mechanism includes a slide rail, a slider and an inclined support rod. The slider is slidably arranged on the slide rail. One end of the inclined support rod is hinged to the slider and the other end is hinged to the swing arm. The slider is provided with a locking piece for locking with the slide rail.

[0016] An inclinometer for measuring the angle of the swing arm is arranged on the swing arm.

[0017] Compared with the prior art, the advantages of the present invention are: The fixed-angle acceleration loading device for fiber optic gyroscope detection of the present invention adopts a single pendulum mechanism to carry the fiber optic gyroscope to be tested to collide with a swing-stop pad in a circular motion, and after a certain angular velocity is given to the fiber optic gyroscope to be tested, the angular velocity is instantly returned to zero when a collision occurs, thereby completing the loading of the angular acceleration of the fiber optic gyroscope to be tested. The device has a simple structure and is easy to operate, and can apply an angular acceleration of a sufficient magnitude to the fiber optic gyroscope to be tested, so as to complete the angular acceleration tolerance test of the fiber optic gyroscope to be tested. At the same time, by measuring the energy storage position and the energy storage size, a specific angular acceleration theoretical input value can be calculated according to an energy conversion formula, and by comparing the detection output value of the fiber optic gyroscope to be tested with the theoretical input value, the angular acceleration measurement accuracy of the fiber optic gyroscope to be tested can be evaluated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 The three-dimensional structure diagram of the embodiment 1 of the fixed angle acceleration loading device for fiber optic gyroscope detection of the present invention is shown in FIG. Figure 1 .

[0020] Figure 2 The three-dimensional structure diagram of the embodiment 1 of the fixed angle acceleration loading device for fiber optic gyroscope detection of the present invention is shown in FIG. Figure 2 .

[0021] Figure 3 Schematic diagram of the three-dimensional structure of the embodiment 2 of the fixed angle acceleration loading device for fiber optic gyroscope detection of the present invention Figure 1 .

[0022] Figure 4 Schematic diagram of the three-dimensional structure of the embodiment 2 of the fixed angle acceleration loading device for fiber optic gyroscope detection of the present invention Figure 2 .

[0023] Figure 5 The three-dimensional structure diagram of the embodiment 3 of the fixed angle acceleration loading device for fiber optic gyroscope detection of the present invention is shown in FIG. Figure 1 .

[0024] Figure 6 The three-dimensional structure diagram of the embodiment 3 of the fixed angle acceleration loading device for fiber optic gyroscope detection of the present invention is shown in FIG. Figure 2 .

[0025] Figure 7 The three-dimensional structure diagram of the embodiment 4 of the fixed angle acceleration loading device for fiber optic gyroscope detection of the present invention is shown in FIG. Figure 1 .

[0026] Figure 8 The three-dimensional structure diagram of the embodiment 4 of the fixed angle acceleration loading device for fiber optic gyroscope detection of the present invention is shown in FIG. Figure 2 .

[0027] The reference numerals in the accompanying drawings represent: 1. Simple pendulum mechanism; 100. Fiber optic gyroscope to be tested; 11. Swing arm; 111. First swing arm; 112. Second swing arm; 113. Angle meter; 12. Mounting seat; 121. Roller; 122. Roller ball; 13. Rotating shaft; 14. Rotating shaft frame; 2. Anti-swing pad; 3. Simple pendulum energy storage and release mechanism; 31. Slide rail; 32. Sliding block; 321. Locking piece; 33. Main support rod; 331. Height scale; 34. Support block; 35. Oblique support rod. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0029] Embodiment 1: like Figure 1 and Figure 2 As shown, the fixed-angle acceleration loading device for fiber optic gyroscope detection of this embodiment includes a simple pendulum mechanism 1, a swing-stop pad 2 and a simple pendulum energy storage and release mechanism 3. The simple pendulum mechanism 1 includes a swing arm 11, and the swing arm 11 is provided with a mounting seat 12 for mounting the fiber optic gyroscope 100 to be tested. The single pendulum energy storage and release mechanism 3 is used to keep the swing arm 11 in the energy storage position, and can instantly release the swing arm 11 to make it swing freely under the action of gravity. The swing-stop pad 2 is arranged on the free swing path of the swing arm 11. The fixed-angle acceleration loading device for fiber optic gyroscope detection of the present invention adopts a single pendulum mechanism 1 to carry a fiber optic gyroscope 100 to be tested to collide with a swing-stop pad 2 in a circular motion, and after a certain angular velocity is given to the fiber optic gyroscope 100 to be tested, the angular velocity is instantly returned to zero when the collision occurs, so as to complete the loading of the angular acceleration of the fiber optic gyroscope 100 to be tested. The device has a simple structure and is easy to operate, and can apply an angular acceleration of a sufficient magnitude to the fiber optic gyroscope 100 to complete the angular acceleration tolerance test of the fiber optic gyroscope 100 to be tested. At the same time, by measuring the energy storage position and the energy storage size, the specific angular acceleration theoretical input value can be calculated according to the energy conversion formula, and by comparing the detection output value of the fiber optic gyroscope 100 to be tested with the theoretical input value, the angular acceleration measurement accuracy of the fiber optic gyroscope 100 to be tested can be evaluated.

[0030] In this embodiment, the single-swing mechanism 1 also includes a rotating shaft 13, and the swing arm 11 includes a first swing arm 111 and a second swing arm 112. The first swing arm 111 and the second swing arm 112 are vertically arranged, and the first swing arm 111 is hinged to the rotating shaft 13. The mounting seat 12 is installed on the second swing arm 112, and the anti-swing pad 2 is arranged on the free swing path of the second swing arm 112. When the second swing arm 112 contacts the anti-swing pad 2, the first swing arm 111 is perpendicular to the contact plane between the second swing arm 112 and the anti-swing pad 2, and the contact plane is located on the horizontal plane. Through the above settings, the measurement and calculation of the theoretical input value of angular acceleration can be simplified, which provides convenience for the detection work. In this embodiment, two anti-swing pads 2 are arranged at intervals. This structure can reduce the deformation of the second swing arm 112 when it collides with the anti-swing pad 2, which is conducive to improving the detection accuracy.

[0031] In this embodiment, the simple pendulum energy storage and release mechanism 3 includes a slide rail 31, a slider 32, a main support rod 33 and a support block 34. The slider 32 is slidably arranged on the slide rail 31, the bottom end of the main support rod 33 is fixed on the slider 32, and the support block 34 is sleeved on the main support rod 33, and its height position on the main support rod 33 is adjusted and fixed by a set screw. By adjusting the height position of the support block 34, the energy storage position and energy storage size can be controlled, thereby achieving the purpose of accurately controlling the input angular acceleration size.

[0032] In this embodiment, the slider 32 is provided with a locking member 321 for locking with the slide rail 31. Before release, the slider 32 can be locked with the slide rail 31 by the locking member 321 to prevent the slider 32 from sliding under force, so as to facilitate the detection operation. In this embodiment, the mounting seat 12 is provided with a roller 121 for cooperating with the support block 34. When released, the roller 121 rolls on the support block 34 to reduce the influence of the friction between the two on the release accuracy control. In this embodiment, the main support rod 33 is provided with a height scale 331 for measuring the height position of the support block 34, so as to calculate the energy storage size through the height reading.

[0033] Embodiment 2: like Figure 3 and Figure 4 As shown, this embodiment is basically the same as embodiment 1, with the only difference being that, in this embodiment, no height scale 331 is provided on the main support rod 33, but an inclinometer 113 for measuring the angle of the swing arm 11 is installed on the second swing arm 112 in the swing arm 11, and its function is the same as that of the height scale 331, both of which are for the convenience of calculating the amount of stored energy.

[0034] Embodiment 3: like Figure 5 and Figure 6 As shown, this embodiment is basically the same as the embodiment 2, and the only difference is the single pendulum energy storage and release mechanism 3. In this embodiment, the single pendulum energy storage and release mechanism 3 includes a slide rail 31, a slider 32 and an inclined support rod 35. The slider 32 is slidably arranged on the slide rail 31. One end of the inclined support rod 35 is hinged to the slider 32, and the other end is hinged to the swing arm 11. The slider 32 is provided with a locking member 321 for locking with the slide rail 31. When the locking state of the slider 32 and the slide rail 31 by the locking member 321 is released, the release can be completed.

[0035] Embodiment 4: like Figure 7 and Figure 8As shown, this embodiment is basically the same as the embodiment 2, and the difference is only in the single pendulum mechanism 1. In this embodiment, the single pendulum mechanism 1 also includes a rotating shaft 13 and a rotating shaft frame 14, the rotating shaft 13 is mounted on the rotating shaft frame 14, the upper end of the swing arm 11 is hinged to the rotating shaft frame 14, the mounting seat 12 is fixedly mounted on the lower end of the swing arm 11, and the anti-swing pad 2 is arranged at the lower part of the rotating shaft frame 14. When the swing arm 11 contacts the anti-swing pad 2, the swing arm 11 is perpendicular to the horizontal plane. In this embodiment, a rolling ball 122 for cooperating with the support block 34 is provided on the mounting seat 12.

[0036] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A fixed-angle acceleration loading device for fiber optic gyroscope detection, characterized in that: The invention comprises a single pendulum mechanism (1), a swing-stop pad (2) and a single pendulum energy storage and release mechanism (3), wherein the single pendulum mechanism (1) comprises a swing arm (11), the swing arm (11) being provided with a mounting seat (12) for mounting a fiber optic gyroscope (100) to be tested, the single pendulum energy storage and release mechanism (3) being used to keep the swing arm (11) at an energy storage position and being able to instantly release the swing arm (11) so that it swings freely downward under the action of gravity, and the swing-stop pad (2) being arranged on the free swing path of the swing arm (11).

2. The fixed-angle acceleration loading device for fiber optic gyroscope detection according to claim 1, characterized in that: The single-oscillating mechanism (1) further comprises a rotating shaft (13); the swing arm (11) comprises a first swing arm (111) and a second swing arm (112); the first swing arm (111) and the second swing arm (112) are arranged vertically; the first swing arm (111) and the rotating shaft (13) are hingedly connected; and the mounting seat (12) is mounted on the second swing arm (112).

3. The fixed-angle acceleration loading device for fiber optic gyroscope detection according to claim 2, characterized in that: The anti-sway pad (2) is arranged on the free downward swing path of the second swing arm (112); when the second swing arm (112) contacts the anti-sway pad (2), the first swing arm (111) is perpendicular to a contact plane between the second swing arm (112) and the anti-sway pad (2), and the contact plane is located on a horizontal plane.

4. The fixed-angle acceleration loading device for fiber optic gyroscope detection according to claim 1, characterized in that: The single-oscillating mechanism (1) further comprises a rotating shaft (13) and a rotating shaft frame (14); the rotating shaft (13) is mounted on the rotating shaft frame (14); the upper end of the swing arm (11) is hinged to the rotating shaft frame (14); and the mounting seat (12) is fixedly mounted on the lower end of the swing arm (11).

5. The fixed-angle acceleration loading device for fiber optic gyroscope detection according to claim 4, characterized in that: The anti-sway pad (2) is arranged at the lower part of the rotating shaft frame (14); when the swing arm (11) is in contact with the anti-sway pad (2), the swing arm (11) is perpendicular to a horizontal plane.

6. The fixed-angle acceleration loading device for fiber optic gyroscope detection according to any one of claims 1 to 5, characterized in that: The simple pendulum energy storage and release mechanism (3) comprises a slide rail (31), a slider (32), a main support rod (33) and a support block (34); the slider (32) is slidably mounted on the slide rail (31); the bottom end of the main support rod (33) is fixed to the slider (32); the support block (34) is sleeved on the main support rod (33) and its height position on the main support rod (33) is adjusted and fixed by means of a set screw.

7. The fixed-angle acceleration loading device for fiber optic gyroscope detection according to claim 6, characterized in that: The sliding block (32) is provided with a locking piece (321) for locking with the sliding rail (31).

8. The fixed-angle acceleration loading device for fiber optic gyroscope detection according to claim 6, characterized in that: The mounting seat (12) is provided with a roller (121) or a rolling ball (122) for cooperating with the support block (34).

9. The fixed-angle acceleration loading device for fiber optic gyroscope detection according to claim 6, characterized in that: The main support rod (33) is provided with a height scale (331) for measuring the height position of the support block (34).

10. The fixed-angle acceleration loading device for fiber optic gyroscope detection according to claim 6, characterized in that: The swing arm (11) is provided with an inclinometer (113) for measuring the angle of the swing arm (11).

11. The fixed-angle acceleration loading device for fiber optic gyroscope detection according to any one of claims 1 to 5, characterized in that: The single pendulum energy storage and release mechanism (3) comprises a slide rail (31), a slider (32) and an oblique support rod (35); the slider (32) is slidably mounted on the slide rail (31); one end of the oblique support rod (35) is hinged to the slider (32) and the other end is hinged to the swing arm (11); the slider (32) is provided with a locking member (321) for locking with the slide rail (31).

12. The fixed-angle acceleration loading device for fiber optic gyroscope detection according to claim 11, characterized in that: The swing arm (11) is provided with an inclinometer (113) for measuring the angle of the swing arm (11).

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