阅读说明：本技术 一种石英音叉陀螺减振装置 (Quartz tuning fork gyroscope vibration damper ) 是由 刘飞 刘晓智 王汝弢 张菁华 盛洁 苏翼 王登顺 王永胜 于 2020-06-03 设计创作，主要内容包括：本发明涉及一种石英音叉陀螺减振装置,石英音叉(103)、组合梁(301)、膜状结构(302)以及管壳(303)。组合梁(301)包含四个呈空间S形分布弹性梁(311),外侧与膜状结构(302)固定,内侧与石英音叉中心锚点(104)相连,膜状结构(302)的下部为用于提供稳定封闭环境的管壳(303)。膜状结构(302)整体呈长方形,在与驱动叉指(105)和所述检测叉指(106)对应处开有豁口(320)。在不增大体积的条件下,能够有效隔离和衰减外界振动、冲击等力学输入,抑制应力。(The invention relates to a vibration damper of a quartz tuning fork gyroscope, which comprises a quartz tuning fork (103), a combination beam (301), a membrane structure (302) and a tube shell (303). The composite beam (301) comprises four elastic beams (311) distributed in a space S shape, the outer side of each elastic beam is fixed with the membrane-shaped structure (302), the inner side of each elastic beam is connected with the central anchor point (104) of the quartz tuning fork, and the lower part of each membrane-shaped structure (302) is provided with a pipe shell (303) for providing a stable closed environment. The membrane-like structure (302) is rectangular overall and is provided with a notch (320) at a position corresponding to the drive finger (105) and the detection finger (106). Under the condition of not increasing the volume, the mechanical input such as external vibration, impact and the like can be effectively isolated and attenuated, and the stress is restrained.)

1. A quartz tuning fork gyroscope vibration damping device is characterized in that a quartz tuning fork (103) is arranged in a gauge outfit (102) of a quartz tuning fork gyroscope, the whole quartz tuning fork (103) is H-shaped, a central rectangular area is an anchor point (104), and a driving interdigital (105) and a detecting interdigital (106) are respectively arranged on two sides of the quartz tuning fork gyroscope vibration damping device, and an elastic supporting structure is arranged in the gauge outfit (102), achieves mechanical support on one hand for the quartz tuning fork (103), and isolates and attenuates external vibration and impact on the other hand.

2. The vibration damper of quartz tuning fork gyroscope of claim 1, wherein the elastic support structure comprises a composite beam (301), a membrane-like structure (302) and a tube shell (303);

the combined beam (301) comprises four elastic beams (311) distributed in an S shape, the outer side of each elastic beam is fixed with the membrane-shaped structure (302), the inner side of each elastic beam is connected with the central anchor point (104) of the quartz tuning fork, and the lower part of each membrane-shaped structure (302) is provided with a pipe shell (303) for providing a closed environment.

3. The vibration damper of quartz tuning fork gyroscope of claim 2, characterized in that the membrane-like structure (302) is rectangular in shape as a whole and has notches (320) at positions corresponding to the driving fingers (105) and the detecting fingers (106).

4. The vibration damper of quartz tuning fork gyroscope according to claim 2, characterized in that the materials of the composite beam (301) and the membrane-like structure (302) are metal or resin.

5. The vibration damper of quartz tuning fork gyroscope according to any of claims 1-4, wherein the support frequency is adjusted by adjusting parameters such as the section and length of the composite beam, and the support frequency is 2 kHz-3 kHz.

Technical Field

The invention belongs to the technical field of vibration reduction, and particularly relates to a vibration reduction device for a quartz tuning fork gyroscope sensitive structure.

Background

The quartz tuning fork gyroscope is based on the piezoelectric effect and the Coriolis vibration principle, and has the outstanding advantages of low cost, small volume, light weight, low power consumption and the like. In actual use, in order to attenuate external vibration and impact input and provide mechanical environment adaptability, the gyroscope is generally required to be subjected to vibration reduction protection. One common vibration damping is shown in fig. 1, four discrete cylindrical vibration dampers 101 are used for protecting a watch head 102 (containing a sensitive element, namely a quartz tuning fork) of the quartz tuning fork gyroscope, so as to suppress and filter external vibration and impact, and the other common vibration damping is shown in fig. 2, and an integrated vibration damper 201 formed by injection molding or metal mold pressing is used for protecting the watch head 102 of the gyroscope.

The vibration reduction modes are external vibration reduction modes, generally occupy larger additional space, and are not beneficial to exerting the advantages of small size, high integration level and the like of the quartz tuning fork gyroscope.

Disclosure of Invention

The invention solves the technical problem of providing the vibration damper used in the quartz tuning fork gyroscope, which can effectively isolate and attenuate external vibration, impact and other mechanical inputs and inhibit stress under the condition of not increasing the volume.

The technical scheme of the vibration damper of the quartz tuning fork gyroscope comprises the following steps: the quartz tuning fork gyroscope is characterized in that an elastic supporting structure is arranged in the gauge head 102, and mechanically supports the quartz tuning fork 103 on one hand, and isolates and attenuates external vibration and impact on the other hand.

Further, the elastic support structure comprises a composite beam 301, a membrane-like structure 302 and a tube shell 303;

the composite beam 301 comprises four elastic beams 311 distributed in an S shape, the outer side of each elastic beam 311 is fixed to the membrane-like structure 302, the inner side of each elastic beam is connected to the central anchor point 104 of the quartz tuning fork, and the lower part of the membrane-like structure 302 is provided with a tube shell 303 for providing a closed environment.

Further, the membrane-like structure 302 is rectangular as a whole, and a slit 320 is opened at a position corresponding to the driving finger 105 and the detecting finger 106.

Further, the material of the composite beam 301 and the membrane-like structure 302 is metal or resin.

Furthermore, the supporting frequency is adjusted by adjusting parameters such as the section, the length and the like of the combined beam, and the supporting frequency is 2 kHz-3 kHz.

The invention has the beneficial effects that: under the condition of not increasing the volume, the built-in elastic beam structure can effectively isolate and attenuate external vibration, impact and other mechanical inputs, inhibit stress and the like, and improve the mechanical environment adaptability of the gyroscope.

Drawings

FIG. 1 is a schematic diagram of a quartz tuning fork gyroscope with discrete vibration damping;

FIG. 2 is a schematic diagram of integrated vibration reduction of a quartz tuning fork gyroscope head;

FIG. 3 is a schematic view of the vibration damping device of the quartz tuning fork gyroscope of the present invention;

FIG. 4 is a front view of the inner damping;

FIG. 5 is a partial view of a composite beam;

FIG. 6 is a schematic view of the interconnection of a composite beam with a quartz tuning fork.

In the figure: 101. the vibration absorber comprises a discrete cylindrical vibration absorber, 102 parts of a gauge head, 103 parts of a quartz tuning fork, 104 parts of an anchor point, 105 parts of a driving interdigital, 106 parts of a detection interdigital, 201 parts of an integrated vibration absorber, 301 parts of a combined beam, 302 parts of a membrane structure, 303 parts of a tube shell, 311 parts of an elastic beam and 320 parts of a notch.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In order to overcome the defects of the prior art, the invention adopts a built-in vibration reduction mode.

The gauge head 102 of the quartz tuning fork gyroscope comprises a quartz tuning fork 103, the quartz tuning fork 103 is integrally H-shaped, the central rectangular area is an anchor point 104, and a driving interdigital 105 and a detection interdigital 106 are respectively arranged on two sides of the central rectangular area. According to the invention, the elastic support structure is arranged in the gauge outfit 102, so that on one hand, the mechanical support of the quartz tuning fork 103 is realized, and meanwhile, the elastic support structure can effectively isolate and attenuate external vibration, impact and other mechanical inputs, suppress stress and the like, and improve the mechanical environment adaptability of the gyroscope under the condition of not increasing the volume.

As shown in fig. 3 and 4, the internal damping for the MEMS inertial meter is composed of a quartz tuning fork 103 (object to be damped), a composite beam 301, a membrane-like structure 302, a tube shell 303, and the like.

The whole of the object quartz tuning fork 103 to be damped is H-shaped, and the central rectangular area is an anchor point 104. On either side are a drive finger 105 and a sense finger 106.

As shown in fig. 5 and 6, the composite beam 301 includes four S-shaped elastic beams 311, and the outer sides of the elastic beams 311 are fixedly connected to the membrane-like structure 302 by gluing or welding. The inner side of the elastic beam 311 is connected with the central anchor point 104 of the quartz tuning fork, and can be glued or welded. The supporting frequency can be adjusted by adjusting parameters such as the section, the length and the like of the combined beam, and a typical supporting frequency is 2 kHz-3 kHz.

The membrane-like structure 302 is rectangular as a whole, the driving finger 105 and the detecting finger 106 are provided with notches 320 at their corresponding positions, and the material of the combination beam 301 and the membrane-like structure 302 may be metal or resin.

The lower part of the membrane-like structure 302 is a tube shell 303, which is used for providing a stable closed environment for the quartz tuning fork, the composite beam and the membrane-like structure, and the corresponding positions of the membrane-like structure 302 and the tube shell 303 can be fixedly connected through gluing or welding.

The above embodiments are only for explaining and explaining the technical solution of the present invention, but should not be construed as limiting the scope of the claims. It should be clear to those skilled in the art that any simple modification or replacement based on the technical solution of the present invention may be adopted to obtain a new technical solution, which falls within the scope of the present invention.