Clamping device for testing Q value of micro-hemispherical harmonic oscillator

Abstract

The utility model discloses a clamping device used for a micro-hemispherical harmonic oscillator Q value test, comprising a clamping assembly and a screw cap, the clamping assembly comprises a clamping part, a thread part and an installation part from top to bottom, the top surface of the clamping part is provided with a positioning hole matched with an anchor post of a micro-hemispherical harmonic oscillator, and the screw cap is arranged on the clamping part. The top end part of the side wall of the clamping part is a conical surface of which the outer diameter is gradually reduced from bottom to top, the upper part of the clamping part is provided with a plurality of clamping blocks, the top surface of the screw cover is provided with a through hole through which an anchor post of the micro-hemispherical harmonic oscillator passes, the screw cover sleeves the clamping assembly, the upper part of the screw cover is matched with the clamping part, and the lower part of the screw cover is in threaded connection with the threaded part; and in the process that the screw cap is screwed to the lower part to be in threaded connection with the threaded part, the upper part of the screw cap drives the clamping block to approach the adjacent clamping block along the rotation direction, so that the positioning hole is shrunk to lock the anchor post of the micro-hemispherical harmonic oscillator. According to the utility model, it can be ensured that the micro-hemisphere harmonic oscillator does not slip or shake in the Q value test process, so that the accuracy of the Q value test result of the harmonic oscillator is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of inertial navigation device preparation, in particular to a clamping device used for Q value testing of a micro-hemispherical resonator. Background Art

[0002] The hemispherical resonator gyroscope is a new type of solid-state navigation gyroscope for measuring precession angle, and its core component is a hemispherical resonator made of fused quartz. The micro-hemispherical quality factor is a common parameter for measuring its processing accuracy and performance. The hemispherical resonator with high symmetry has stable physical properties, that is, it has a high quality factor (Q value). However, due to the current technical processing conditions, the hemispherical resonator has different degrees of mass uniformity errors, which leads to a decrease in the quality factor of the hemispherical resonator, thereby affecting the real-time and long-term measurement accuracy of the hemispherical resonator. Therefore, the processed hemispherical resonator needs to be tested for Q value, usually by Doppler laser interferometer. Specifically, under high vacuum conditions, the hemispherical resonator is made to resonate by physical knocking, piezoelectric excitation, capacitive electrostatic excitation and other methods, and its natural frequency, amplitude and decay time are detected by Doppler laser interferometer, and its quality factor is calculated based on the natural frequency and amplitude.

[0003] Since the micro-hemispherical resonator is made of fused quartz material, it is brittle, thin-walled, and fragile. The size of the micro-hemispherical resonator is small, usually with a diameter of 5-10mm and a height of 3-5mm. In particular, the thickness of the micro-hemispherical shell is only a few dozen microns. The test requires the hemispherical resonator to be fixed on a turntable or other fixed position in the vacuum chamber, and the hemispherical resonator needs to be vibrated and rotated during the test. The hemispherical resonator is often broken and damaged due to improper human operation or poor clamping methods, resulting in a significant increase in material and processing costs. During the Q value test, when the clamping structure does not coincide with the central axis of the hemisphere or the clamping is not secure, according to vibration theory, the vibration energy of the vibrator can easily be lost to the base through the support point, which can easily lead to errors in the Q value test results.

[0004] In addition, in order to avoid the influence of water vapor or surface impurities on the Q value (which will greatly reduce the test results), the hemisphere usually needs to be clamped for professional cleaning and heat drying before testing. The transportation process between different processes will also increase the risk of micro-hemisphere breakage. And during the transportation or process of the micro-hemisphere between processes, it is also necessary to use clamping tools to firmly fix the anchor position of the hemisphere to avoid damage. Summary of the invention

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a clamping device for Q value testing of a micro-hemispherical resonator, which can improve the accuracy of the resonator Q value testing result.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A clamping device for testing the Q value of a micro-hemispherical resonator, comprising a clamping component and a screw cap.

[0008] The clamping assembly comprises a clamping portion, a threaded portion and a mounting portion from top to bottom, the mounting portion is used to be connected to a micro-hemispherical resonator Q value test device, a positioning hole matched with an anchor column of the micro-hemispherical resonator is provided on the top surface of the clamping portion, the top end of the side wall of the clamping portion is a conical surface with an outer diameter gradually decreasing from bottom to top, and a plurality of side grooves communicating with the positioning holes are provided at intervals in the circumferential direction on the upper side wall of the clamping portion, so as to divide the upper portion of the clamping portion into a plurality of clamping blocks,

[0009] A through hole is provided on the top surface of the screw cap for the anchor column of the micro-hemispherical resonator to pass through. The screw cap is sleeved on the clamping assembly, and its upper part cooperates with the clamping part, and its lower part is threadedly connected with the threaded part. When the screw cap is screwed until its lower part is threadedly connected with the threaded part, its upper part drives the clamping block to approach the adjacent clamping block along the rotation direction, so that the positioning hole is reduced to lock the anchor column of the micro-hemispherical resonator.

[0010] As a further improvement of the above technical solution:

[0011] The clamping portion is detachably connected to the threaded portion.

[0012] The top surface of the threaded portion is provided with a center hole matched with the lower portion of the clamping portion, and the lower portion of the clamping portion is inserted into the center hole so that the clamping portion and the threaded portion are detachably connected.

[0013] The center hole and the positioning hole are coaxially arranged.

[0014] A limiting portion is provided at the junction of the upper and lower portions of the clamping portion to limit the upper portion of the clamping portion from extending into the central hole.

[0015] The outer diameter of the upper portion of the clamping portion is greater than that of the lower portion thereof, and the limiting portion is a step formed between the upper portion and the lower portion of the clamping portion.

[0016] The outer diameter of the upper part of the clamping part is larger than that of the lower part thereof, and the limiting part is a chamfered surface formed at the lower end of the upper part of the clamping part.

[0017] The upper outer surface of the rotary cover is a hemispherical surface matched with the micro-hemispherical resonator.

[0018] The upper outer surface of the rotary cover is provided with an anti-slip portion for facilitating manual rotation of the rotary cover.

[0019] The threaded portion and the mounting portion are integrally formed.

[0020] The inner surface of the lower part of the screw cap has an internal thread, and the outer surface of the threaded part has an external thread matching the internal thread. The lower part of the screw cap is threadedly connected to the threaded part through the matching of the internal thread and the external thread.

[0021] Compared with the prior art, the advantages of the utility model are:

[0022] 1. The micro-hemispherical resonator clamping device of the utility model is cleverly designed and matched with the clamping assembly and the screw cover. Specifically, the upper part of the screw cover cooperates with the clamping part of the clamping assembly, and the lower part of the screw cover can be threadedly connected with the threaded part of the clamping assembly. When in use, the screw cover is covered on the clamping assembly, and then the anchor column of the micro-hemispherical resonator is passed through the through hole at the upper end of the screw cover and then extends into the positioning hole of the clamping part. Since the top end of the side wall of the clamping part is a conical surface with an outer diameter gradually decreasing from bottom to top, and the upper side wall of the clamping part is circumferentially spaced with a plurality of side grooves connected with the positioning hole, the upper part of the clamping part is divided into a plurality of clamping blocks, and the upper part of the screw cover is a conical surface matched with the clamping part, which has an inward tendency, so that by rotating the screw cover downward, when the screw cover is screwed to its lower part and threadedly connected with the threaded part, its upper part will drive the clamping block to approach the adjacent clamping block along the rotation direction, so that the positioning hole is reduced to lock the anchor column of the micro-hemispherical resonator. Therefore, during the test of the micro-hemispherical resonator, the anchor column is firmly clamped, and the micro-hemispherical resonator will not slip or shake, thereby ensuring the accuracy of the resonator Q value test result.

[0023] 2. The micro-hemispherical resonator clamping device of the utility model has a simple overall structure, few connections, and a high Young's modulus of the material. During the Q value test of the micro-hemispherical resonator, the energy loss transmitted by the piezoelectric ceramic is small, and the test result is more accurate.

[0024] 3. The micro-hemispherical resonator clamping device of the utility model does not need to use adhesive materials such as asphalt and beeswax that are easy to contaminate the hemisphere, and can keep the hemisphere resonator clean, reduce the cleaning process, and reduce the risk of loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a clamping device for testing the Q value of a micro-hemispherical resonator according to an embodiment of the utility model;

[0026] Figure 2 It is a schematic diagram of the exploded structure of the clamping device for Q value testing of a micro-hemispherical resonator according to an embodiment of the utility model;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the screw cap;

[0028] Figure 4 is a schematic diagram of the three-dimensional structure of the clamping part;

[0029] Figure 5It is a schematic diagram of the three-dimensional structure of the threaded part and the mounting part.

[0030] Legend: 1. Micro hemisphere; 2. Screw cap; 21. Anti-slip part; 22. Through hole; 23. Internal thread; 3. Clamping part; 31. Side groove; 32. Positioning hole; 33. Pillar; 34. Limiting part; 35. Clamping block; 4. Threaded part; 41. Center hole; 42. External thread. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0032] like Figure 1 and Figure 2 As shown, the clamping device for Q value testing of a micro-hemispherical resonator of this embodiment includes a clamping assembly and a screw cap 2.

[0033] The clamping assembly includes a clamping portion 3, a threaded portion 4 and a mounting portion 5 from top to bottom. The mounting portion is used to connect with the micro-hemispherical resonator Q value test device. A positioning hole 32 cooperating with the anchor column of the micro-hemispherical resonator is provided on the top surface of the clamping portion 3. The top end of the side wall of the clamping portion 3 is a conical surface with an outer diameter gradually decreasing from bottom to top. A plurality of side grooves 31 communicating with the positioning hole 32 are circumferentially spaced apart on the upper side wall of the clamping portion 3 to divide the upper portion of the clamping portion 3 into a plurality of clamping blocks 35.

[0034] A through hole is provided on the top surface of the screw cap 2 for the anchor column of the micro-hemispherical resonator to pass through. The screw cap 2 is sleeved on the clamping assembly, and its upper part cooperates with the clamping part 3, and its lower part is threadedly connected with the threaded part 4. When the screw cap 2 is screwed to the lower part to be threadedly connected with the threaded part 4, its upper part drives the clamping block 35 to move closer to the adjacent clamping block 35 along the rotation direction, so that the positioning hole 32 is reduced to lock the anchor column of the micro-hemispherical resonator.

[0035] Thus, through the ingenious design and cooperation of the clamping assembly and the screw cap 2, specifically, the upper part of the screw cap 2 cooperates with the clamping part 3 of the clamping assembly, and the lower part thereof can be threadedly connected with the threaded part 4 of the clamping assembly. When in use, the screw cap 2 is covered on the clamping assembly, and then the anchor column of the micro-hemispherical resonator is passed through the through hole at the upper end of the screw cap 2 and then extended into the positioning hole 32 of the clamping part 3. Since the top end of the side wall of the clamping part 3 is a tapered surface with a gradually decreasing outer diameter from bottom to top, and the upper side wall of the clamping part 3 is A plurality of side grooves 31 connected with the positioning holes 32 are arranged at intervals to divide the upper portion of the clamping portion 3 into a plurality of clamping blocks 35, and the upper portion of the screw cap 2 is a conical surface matched with the clamping portion 3, which has an inward tendency, so that by rotating the screw cap 2 downward, when the screw cap 2 is screwed to its lower portion and threadedly connected with the threaded portion 4, its upper portion will drive the clamping blocks 35 to approach the adjacent clamping blocks 35 along the rotation direction, so that the positioning holes 32 are reduced to the anchor column that locks the micro-hemispherical resonator. Therefore, during the micro-hemispherical resonator test, the anchor column is firmly clamped, and the micro-hemispherical resonator will not slip or shake, thereby ensuring the accuracy of the resonator Q value test results.

[0036] In addition, the overall structure of the micro-hemispherical resonator clamping device of the utility model is simple, with few connections and high Young's modulus of the material. The energy loss of the piezoelectric ceramics during the Q value test of the micro-hemispherical resonator is small, and the test result is more accurate. In addition, there is no need to use adhesive materials such as asphalt and beeswax that are easy to contaminate the hemisphere, which can keep the hemisphere resonator clean, reduce the cleaning process, and reduce the risk of loss.

[0037] In this embodiment, the clamping portion 3 and the threaded portion 4 are detachably connected.

[0038] In this embodiment, the top surface of the threaded portion 4 is provided with a center hole 41 that cooperates with the lower portion of the clamping portion 3. The lower portion of the clamping portion 3 is a support column 33. The support column 33 is inserted into the center hole 41 so that the clamping portion 3 and the threaded portion 4 are detachably connected.

[0039] In this embodiment, the center hole 41 of the threaded portion 4 and the positioning hole 32 of the clamping portion 3 are coaxially arranged, and the upper part of the screw cap 2 cooperates with the clamping portion 3, and the lower part thereof is threadedly connected to the threaded portion 4, thereby ensuring that the clamping device coincides with the central axis of the hemisphere, further ensuring the accuracy of the resonator Q value test result.

[0040] In this embodiment, a limiting portion 34 is provided at the junction of the upper and lower portions of the clamping portion 3 to limit the upper portion of the clamping portion 3 from extending into the central hole 41 .

[0041] In this embodiment, the outer diameter of the upper portion of the clamping portion 3 is larger than that of the lower portion thereof, and the limiting portion 34 is a chamfered surface formed at the lower end of the upper portion of the clamping portion 3. In other embodiments, the limiting portion 34 may also be a step formed between the upper portion and the lower portion of the clamping portion 3.

[0042] In this embodiment, the upper outer surface of the rotary cover 2 is a hemispherical surface that matches the micro-hemispherical resonator.

[0043] In this embodiment, the upper outer surface of the rotary cover 2 has an anti-slip portion 21 for facilitating manual rotation of the rotary cover 2 .

[0044] In this embodiment, the lower inner surface of the screw cap 2 has an internal thread 23, and the outer surface of the threaded portion 4 has an external thread 42 that matches the internal thread 23. The internal thread 23 and the external thread 42 match to make the lower part of the screw cap 2 threadably connected to the threaded portion 4.

[0045] In this embodiment, the threaded portion 4 and the mounting portion 5 are integrally formed.

[0046] The micro-hemispherical resonator clamping device of this embodiment fixes the micro-hemispherical resonator by aligning and clamping at the same time. First, gently put the screw cap 2 on the clamping part 3, and the anchor column of the micro-hemispherical resonator 1 first passes through the through hole 22 of the screw cap 2 and then extends into the positioning hole 32 of the clamping part 3. Then, the screw cap 2 is rotated. When the screw cap 2 is screwed to the lower part and threadedly connected with the threaded part 4, the upper part of the screw cap 2 will drive the clamping block 35 to move closer to the adjacent clamping block 35 along the rotation direction, so that the positioning hole 32 is reduced to the anchor column that locks the micro-hemispherical resonator. The specific process is as follows:

[0047] S1: Alignment, that is, the centers of the micro-hemispherical anchor column, the through hole 22 of the screw cap 2 and the clamping portion positioning hole 32 are on the same axis, and then Figure 2 They are placed in sequence, wherein the pillar 33 of the clamping part 3 is inserted into the central hole 41 of the threaded part 4. The upper part of the pillar 33 is designed with a chamfered surface that is transitionally connected to the clamping part. The chamfered surface has rigidity due to the material. Since the radius of the cross-sectional circle of the chamfered surface is larger than the aperture size of the central hole 41, it can limit the insertion depth of the clamping part 3 in the threaded part 4, so that it remains in a fixed position.

[0048] S2: The micro-hemisphere 1 is fixed by alignment and clamping at the same time. After the clamping part 3 is fixed, the screw cap 2 is placed on the clamping part 3, and the anchor column of the micro-hemisphere 1 is inserted into the positioning hole 32 of the clamping part 3 through the through hole 22. The outer side of the screw cap 2 is designed with an anti-slip part 21 (specifically, an anti-slip pattern) to increase friction. By rotating the screw cap 2, the internal thread 23 designed on the lower inner surface of the screw cap 2 engages with the external thread 42 of the threaded part 4, and the screw cap 2 gradually moves downward under the action of the thread engagement.

[0049] S3: After the screw cap 2 is placed on the clamping part 3, the outer contour of the four clamping blocks 35 on the top of the clamping part 3 will contact the inner surface of the arc surface on the upper part of the screw cap 2. When the screw cap 2 is screwed downward, since the inner surface of the screw cap 2 is an arc surface with an inward contraction tendency, the clamping blocks 35 are tightened toward the center positioning hole 32 under the action of force, so as to firmly clamp the anchor column part of the micro-hemispherical 1, thereby achieving the clamping of the micro-hemispherical 1.

[0050] In summary, the micro-hemispherical resonant gyroscope clamping device proposed in the utility model is a fixture that can conveniently, safely and accurately clamp and fix the micro-hemispherical, which can avoid damage to the micro-hemispherical during transportation, save material and labor costs, and is beneficial to the Q value test of the micro-hemispherical or other subsequent process processing.

[0051] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A clamping device for testing the Q value of a micro-hemispherical resonator, characterized in that: It comprises a clamping assembly and a screw cap (2), The clamping assembly comprises, from top to bottom, a clamping portion (3), a threaded portion (4) and a mounting portion (5); the mounting portion is used to be connected to a micro-hemispherical resonator Q value test device; a positioning hole (32) cooperating with an anchor column of the micro-hemispherical resonator is provided on the top surface of the clamping portion (3); the top end of the side wall of the clamping portion (3) is a conical surface with an outer diameter gradually decreasing from bottom to top; a plurality of side grooves (31) communicating with the positioning hole (32) are provided at intervals in the circumferential direction on the upper side wall of the clamping portion (3) so as to divide the upper portion of the clamping portion (3) into a plurality of clamping blocks (35); The top surface of the rotary cover (2) is provided with a through hole for the anchor column of the micro-hemispherical resonator to pass through. The rotary cover (2) is sleeved on the clamping assembly, and its upper part cooperates with the clamping part (3), and its lower part is threadedly connected with the threaded part (4). When the rotary cover (2) is screwed until its lower part is threadedly connected with the threaded part (4), its upper part drives the clamping block to approach the adjacent clamping block along the rotation direction, so that the positioning hole (32) is reduced to lock the anchor column of the micro-hemispherical resonator.

2. The clamping device for Q value testing of a micro-hemispherical resonator according to claim 1, characterized in that: The clamping portion (3) and the threaded portion (4) are detachably connected.

3. The clamping device for Q value testing of a micro-hemispherical resonator according to claim 2, characterized in that: The top surface of the threaded portion (4) is provided with a center hole (41) that matches the lower portion of the clamping portion (3), and the lower portion of the clamping portion (3) is inserted into the center hole (41) so that the clamping portion (3) and the threaded portion (4) are detachably connected.

4. The clamping device for Q value testing of a micro-hemispherical resonator according to claim 3, characterized in that: The center hole (41) and the positioning hole (32) are coaxially arranged.

5. The clamping device for Q value testing of a micro-hemispherical resonator according to claim 3, characterized in that: A limiting portion (34) is provided at the junction of the upper and lower portions of the clamping portion (3) to limit the upper portion of the clamping portion (3) from extending into the central hole (41).

6. The clamping device for Q value testing of a micro-hemispherical resonator according to claim 5, characterized in that: The outer diameter of the upper portion of the clamping portion (3) is greater than that of the lower portion thereof, and the limiting portion (34) is a step formed between the upper portion and the lower portion of the clamping portion (3).

7. The clamping device for Q value testing of a micro-hemispherical resonator according to claim 5, characterized in that: The outer diameter of the upper portion of the clamping portion (3) is greater than that of the lower portion thereof, and the limiting portion (34) is a chamfered surface formed at the lower end of the upper portion of the clamping portion (3).

8. The clamping device for Q value testing of a micro-hemispherical resonator according to any one of claims 1 to 7, characterized in that: The upper outer surface of the rotary cover (2) is a hemispherical surface that matches the micro-hemispherical resonator.

9. The clamping device for Q value testing of a micro-hemispherical resonator according to any one of claims 1 to 7, characterized in that: The upper outer surface of the rotary cover (2) has an anti-slip portion (21) for facilitating manual rotation of the rotary cover (2).

10. The clamping device for Q value testing of a micro-hemispherical resonator according to any one of claims 1 to 7, characterized in that: The threaded portion (4) and the mounting portion (5) are integrally formed.

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