Gyroscope calibration rotary table

Abstract

The utility model relates to the technical field of gyroscope calibration equipment, and particularly discloses a gyroscope calibration rotary table which comprises a rotary table driving mechanism, a flange connecting disc A is fixedly arranged at the driving end of the rotary table driving mechanism, the top of the flange connecting disc A is fixedly connected with a flange connecting disc B at the bottom of a circular ring seat A through a bolt, and a circular ring seat B is rotationally arranged in the circular ring seat A; a bolt A for limiting rotation of the circular ring seat B is arranged on the circular ring seat A in a threaded mode, the circular ring seat B is rotationally connected with the mounting seat through a rotating seat mechanism, a gyroscope is fixedly arranged in the middle of the mounting seat, and an industrial personal computer is fixedly arranged on the top surface of the counterweight seat. According to the technical scheme provided by the utility model, through the 90-degree rotating mounting seat or the 90-degree rotating circular ring seat B, scale factor calibration can be carried out on the gyroscope in the three-axis direction by utilizing the rotary table driving mechanism under the condition that the gyroscope is not disassembled and assembled, so that the scale factor calibration efficiency of the gyroscope in the three-axis direction can be greatly improved, and the condition that the gyroscope is damaged due to disassembly and assembly can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gyroscope calibration equipment, in particular to a gyroscope calibration turntable. Background Art

[0002] At present, MEMS gyroscope is a very important miniaturized sensor, which is widely used in navigation, aviation, aerospace, automatic control and other fields, and has important application value. However, the accuracy and stability of MEMS gyroscope are affected by many factors, among which the most critical problem is that its accuracy is not high enough, and calibration is required to improve the accuracy. Generally speaking, the calibration of MEMS gyroscope requires zero bias calibration, scale factor calibration and azimuth calibration. Zero bias refers to the output when there is no angular velocity input, which is the system zero bias error of the gyroscope; the scale factor refers to the ratio of the output signal to the input angular velocity, which is the sensitivity error of the gyroscope; the azimuth calibration is to determine the physical meaning of the gyroscope output signal, that is, to convert it into angle or angular velocity. At present, the steps of gyroscope scale factor calibration are: when performing scale factor calibration, the MEMS gyroscope needs to be placed on a rotating table to rotate it around a certain axis, and then an accurate angle measuring instrument is used to record the angle change. Then, the sensitivity error of the gyroscope is calculated and corrected through the output signal and angle change of the gyroscope. Since the gyroscope can realize angle sensing in three axes (X, Y, and Z axes), when calibrating the scale factor of the gyroscope, after measuring and calibrating the data in the X-axis direction, it is necessary to adjust the position of the gyroscope so that it can rotate around the Y-axis. Finally, it is necessary to adjust the position of the gyroscope so that it can rotate around the Z-axis. The position of the gyroscope needs to be adjusted continuously. This process not only takes a lot of time, but also easily damages the gyroscope. Therefore, it is necessary to design a gyroscope calibration turntable that avoids damage to the gyroscope caused by disassembly and assembly. Therefore, a gyroscope calibration turntable is proposed. Utility Model Content

[0003] The purpose of the utility model is to provide a gyro calibration turntable, which solves the problems raised in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gyro calibration turntable, including a turntable drive mechanism, a flange connection plate A is fixedly provided at the driving end of the turntable drive mechanism, the top of the flange connection plate A is fastened with the flange connection plate B at the bottom of the circular ring seat A by bolts, a circular ring seat B is rotatably provided inside the circular ring seat A, the circular ring seat A is threaded with bolts A for limiting the rotation of the circular ring seat B, the circular ring seat B is rotatably connected to the mounting seat through a rotating seat mechanism, a gyroscope is fixedly provided in the middle of the mounting seat, the rotating seat mechanism is provided with bolts B for limiting the rotation of the mounting seat, the turntable drive mechanism is fixed to the surface of the counterweight seat, and an industrial computer is fixedly provided on the top surface of the counterweight seat.

[0005] As a preferred implementation scheme of the technical solution of the present application, the rotating seat mechanism includes a disc seat fixed on both sides of the inner wall of the circular ring seat B, and a boss seat fixed on both sides of the outside of the mounting seat. The bolt B is threadedly connected to the boss seat, and four threaded holes A of the same size are opened around the surface of the disc seat.

[0006] As a preferred implementation of the technical solution of the present application, a boss is integrally formed on one end of the boss seat facing the disc seat, and a recessed hole for inlaying and cooperating with the boss is opened in the middle of the disc seat.

[0007] As a preferred implementation of the technical solution of the present application, four threaded holes B of the same size are arranged around the outer wall surface of the annular seat B, and the bolts A are threadedly connected to the threaded holes B.

[0008] As a preferred implementation of the technical solution of the present application, the turntable drive mechanism includes a drive motor and a truncated pedestal seat fixed to the top of the drive motor, and annular grooves for accommodating balls are provided on the bottom surface of the flange connection plate A and the top surface of the truncated pedestal seat.

[0009] As a preferred implementation of the technical solution of the present application, a concave square groove is provided at the center of the top surface of the mounting seat, and the gyroscope is fixed inside the concave square groove by bolts.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] 1. The technical solution of the present application can calibrate the proportional factors of the three-axis directions of the gyroscope using the turntable driving mechanism without disassembling the gyroscope by rotating the mounting seat 90° or rotating the annular seat B 90°, which can greatly improve the efficiency of the proportional factor calibration of the three-axis directions of the gyroscope and avoid the situation where the gyroscope is damaged due to disassembly and assembly.

[0012] 2. The technical solution of the present application is to set an annular groove between the flange connection plate A and the pedestal seat to accommodate the ball bearings. When the turntable driving mechanism drives the device above the flange connection plate A to rotate synchronously, the ball bearings can assist in supporting the flange connection plate A, which is beneficial to improving the smoothness of the rotation of the flange connection plate A, thereby improving the accuracy of the gyroscope calibration and verification data. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 It is a stereogram of a gyro calibration turntable of the utility model;

[0015] Figure 2 This is a front view of a gyro calibration turntable of the utility model;

[0016] Figure 3It is a structural schematic diagram of the rotating seat mechanism of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the circular ring seat B of the utility model.

[0018] In the figure: 1. counterweight seat; 2. turntable drive mechanism; 3. industrial computer; 4. round table seat; 401. flange connection plate A; 402. ring groove; 403. ball; 5. circular ring seat A; 501. flange connection plate B; 502. bolt A; 6. circular ring seat B; 601. threaded hole B; 7. rotating seat mechanism; 701. bolt B; 702. boss seat; 703. disc seat; 704. threaded hole A; 8. mounting seat; 801. concave square groove; 9. gyroscope. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Embodiment 1, as Figure 1-4 As shown, the utility model provides a technical solution: a gyro calibration turntable, including a turntable drive mechanism 2, a flange connection plate A401 is fixedly provided at the driving end of the turntable drive mechanism 2, the top of the flange connection plate A401 is fastened to the flange connection plate B501 at the bottom of the annular seat A5 by bolts, an annular seat B6 is rotatably provided inside the annular seat A5, the annular seat A5 is threadedly provided with bolts A502 for limiting the rotation of the annular seat B6, the annular seat B6 is rotatably connected to the mounting seat 8 through a rotating seat mechanism 7, a gyroscope 9 is fixedly provided in the middle of the mounting seat 8, the rotating seat mechanism 7 is provided with bolts B701 for limiting the rotation of the mounting seat 8, the turntable drive mechanism 2 is fixed to the surface of the counterweight seat 1, and an industrial computer 3 is fixedly provided on the top surface of the counterweight seat 1;

[0021] The rotating seat mechanism 7 includes a disc seat 703 fixed to both sides of the inner wall of the annular seat B6, and a boss seat 702 fixed to both sides of the outside of the mounting seat 8. Bolts B701 are threadedly connected to the boss seat 702. Four threaded holes A704 of the same size are opened around the surface of the disc seat 703. A boss is integrally formed at one end of the boss seat 702 facing the disc seat 703. A concave hole inlaid with the boss is opened in the middle of the disc seat 703.

[0022] Four threaded holes B601 of the same size are arranged around the outer wall surface of the annular seat B6, and the bolts A502 are threadedly connected with the threaded holes B601.

[0023] In a specific embodiment of the utility model, the gyroscope 9 is a MEMS gyroscope, and the concave square groove 801 of the mounting seat is used to stably fix the gyroscope 9 to prevent the gyroscope 9 from vibrating or falling off when the gyroscope 9 is in a rotating state. Bolts A502 are provided on both sides of the middle of the circular ring seat A5, and four threaded holes B601 arranged around the outer wall surface of the circular ring seat B6 are arranged with equal angles. The two bolts A502 can be threadedly matched with the two threaded holes B601 at the same time, and the rotation of the circular ring seat B6 can be stably restricted. The boss seats 702 at both ends of the mounting seat 8 are assembled with the mounting seat 8 by threaded fixing, and the convex strips of the boss seat 702 are embedded in the circular Inside the concave hole on the surface of the disc seat 703, the depth of the concave hole is set to 2mm, the length of the convex strip is 2mm, the four threaded holes A704 set on the surface of the disc seat 703 are arranged with equal angles, and the two bolts B701 can simultaneously cooperate with the two threaded holes A704 threads, which can stably limit the rotation of the mounting seat 8. The start and stop of the drive motor of the turntable drive mechanism 2 and the speed control are controlled by the industrial computer 3. A display screen is set on the surface of the industrial computer 3 for displaying the speed. The signal and angle change output by the gyroscope 9 during rotation can be transmitted to the industrial computer 3 through the data line for display, thereby facilitating the calibration of the proportional factor of the gyroscope 9.

[0024] In the preferred technical solution, the turntable driving mechanism 2 includes a driving motor and a truncated pedestal seat 4 fixed to the top of the driving motor. The bottom surface of the flange connection plate A401 and the top surface of the truncated pedestal seat 4 are both provided with annular grooves 402 for accommodating balls 403. When the turntable driving mechanism 2 drives the device above the flange connection plate A401 to rotate synchronously, the balls can assist in supporting the flange connection plate A401, thereby improving the smoothness of the rotation of the flange connection plate A401.

[0025] In the preferred technical solution, a concave square groove 801 is provided at the center of the top surface of the mounting seat 8, and the gyroscope 9 is fixed inside the concave square groove 801 by bolts. The concave square groove 801 of the mounting seat is used to stably fix the gyroscope 9 to prevent the gyroscope 9 from vibrating or falling off when it is rotating.

[0026] Working principle: The gyroscope 9 is fixed inside the mounting seat 8. When the mounting seat 8 is in a horizontal state and the mounting seat 8 and the annular seat B6 are both in a position-limited state, the turntable drive mechanism 2 indirectly drives the gyroscope 9 to rotate. At this time, the proportional factor of the gyroscope 9 in the X-axis direction can be calibrated. After the turntable drive mechanism 2 stops, loosen the bolt B701, and after the mounting seat 8 is rotated 90°, the bolt B701 is re-matched with the corresponding threaded hole A704. At this time, the gyroscope 9 switches to the direction of rotation around the Y-axis, and the annular seat B6 is still in a position-limited state. The turntable drive mechanism 2 again indirectly drives the gyroscope 9 to rotate. At this time, the proportional factor of the gyroscope 9 in the Y-axis direction can be calibrated. After the turntable drive mechanism 2 stops, loosen the bolt A 502, rotate the annular seat B6 90° and then screw the bolt A502 back into the corresponding threaded hole B601. At this time, the gyroscope 9 switches to the direction of rotation around the Z axis, and the turntable driving mechanism 2 indirectly drives the gyroscope 9 to rotate again. At this time, the proportional factor of the gyroscope 9 in the Z axis direction can be calibrated. An annular groove is set between the flange connection plate A401 and the round table seat 4 to accommodate the ball. When the turntable driving mechanism 2 drives the device above the flange connection plate A401 to rotate synchronously, the ball can assist in supporting the flange connection plate A401, which can improve the stability of the rotation of the flange connection plate A401. The signal and angle change output by the gyroscope 9 during rotation can be transmitted to the industrial computer 3 through the data line for display, and its sensitivity error is calculated and corrected.

Claims

1. A gyro calibration turntable, characterized in that: The invention comprises a turntable drive mechanism (2), wherein a flange connection plate A (401) is fixedly provided at a driving end of the turntable drive mechanism (2), the top of the flange connection plate A (401) is fastened to a flange connection plate B (501) at the bottom of a circular ring seat A (5) by means of bolts, a circular ring seat B (6) is rotatably provided inside the circular ring seat A (5), a bolt A (502) for limiting the rotation of the circular ring seat B (6) is threadedly provided on the circular ring seat A (5), the circular ring seat B (6) is rotatably connected to a mounting seat (8) by means of a rotating seat mechanism (7), a gyroscope (9) is fixedly provided at the middle of the mounting seat (8), the rotating seat mechanism (7) is provided with a bolt B (701) for limiting the rotation of the mounting seat (8), the turntable drive mechanism (2) is fixed to the surface of a counterweight seat (1), and an industrial control computer (3) is fixedly provided on the top surface of the counterweight seat (1).

2. The gyro calibration turntable according to claim 1, characterized in that: The rotating seat mechanism (7) comprises a disc seat (703) fixed to both sides of the inner wall of the annular seat B (6), and a boss seat (702) fixed to both sides of the outside of the mounting seat (8), the bolt B (701) being threadedly connected to the boss seat (702), and four threaded holes A (704) of the same size are formed around the surface of the disc seat (703).

3. The gyro calibration turntable according to claim 2, characterized in that: A boss is integrally formed on one end of the boss seat (702) facing the disc seat (703), and a concave hole for mating with the boss is provided in the middle of the disc seat (703).

4. The gyro calibration turntable according to claim 1, characterized in that: Four threaded holes B (601) of the same size are formed around the outer wall surface of the annular seat B (6), and the bolts A (502) are threadedly connected to the threaded holes B (601).

5. The gyro calibration turntable according to claim 1, characterized in that: The turntable drive mechanism (2) comprises a drive motor and a truncated pedestal seat (4) fixed to the top of the drive motor, and an annular groove (402) for accommodating a ball (403) is provided on the bottom surface of the flange connection plate A (401) and the top surface of the truncated pedestal seat (4).

6. The gyro calibration turntable according to claim 1, characterized in that: A concave square groove (801) is provided at the center of the top surface of the mounting seat (8), and the gyroscope (9) is fixed inside the concave square groove (801) by means of bolts.

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