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Mercury ring of magnetofluid angular velocity sensor and cementing method of mercury ring

An angular velocity sensor and magnetic fluid technology, applied to devices using electric/magnetic methods, steering sensing equipment, and devices for coating liquid on the surface, etc., can solve the problem of difficult control of the amount of adhesive, leaky mercury rings, Affect the measurement accuracy and other issues, to achieve the effect of increasing the area of ​​the bonding surface, ensuring the sealing of the bonding surface, and ensuring the measurement accuracy

Pending Publication Date: 2021-04-02
SHANGHAI AEROSPACE CONTROL TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (3) It is difficult to control the amount of adhesive
Too much glue will cause glue overflow, which will affect the measurement accuracy; too little glue will cause the mercury ring to leak, and the mercury will leak

Method used

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  • Mercury ring of magnetofluid angular velocity sensor and cementing method of mercury ring
  • Mercury ring of magnetofluid angular velocity sensor and cementing method of mercury ring
  • Mercury ring of magnetofluid angular velocity sensor and cementing method of mercury ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] (1) Gluing preparation stage

[0039] Step S1.1, cleaning the inner cylinder, outer cylinder and electrodes to make their surfaces smooth; since air bubbles may be generated on the bonding surface during the bonding process, put the cleaned inner cylinder, outer cylinder and electrodes into high temperature In the oven, set the temperature above 80°C and bake for more than half an hour to keep the surface of each part dry;

[0040] Step S1.2, since there are air bubbles in the cement itself when mixing, put the cement in a vacuum tank and evacuate until the air pressure is lower than 10 -2 Pa, to exhaust the air bubbles in the cement.

[0041] (2) Bonding stage

[0042] Step 1, after using the dispensing needle to apply the adhesive to the inner groove of the upper electrode or the lower electrode, insert the inner cylinder vertically into the inner groove of the lower electrode;

[0043] Step 2. Tilt the inserted assembly back and forth several times, each time the ...

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Abstract

The invention discloses a mercury ring of a magnetofluid angular velocity sensor and a cementing method of the mercury ring. The mercury ring comprises an electrode, an inner cylinder and an outer cylinder, wherein the electrode comprises an upper electrode and a lower electrode; the inner cylinder and the outer cylinder are hollow cylinders which are coaxially arranged and are fixed between the upper electrode and the lower electrode; annular grooves are formed in the portions, which make contact with the inner cylinder and the outer cylinder, of the electrode respectively, the annular grooves comprise an inner groove and an outer groove, the inner cylinder and the outer cylinder can be inserted into the inner groove and the outer groove respectively, a closed cavity is formed between theinner cylinder and the outer cylinder, the closed cavity is filled with mercury, and a convex structure is arranged between the two grooves on the same electrode. According to the invention, the grooves and glue storage grooves are designed, so that the area of a cementing surface is increased, and the cementing effectiveness is ensured; bubbles in the cementing process are controlled, the glue stacking height of the cementing surface is quantitatively controlled, the sealing of the cementing surface is ensured, and the measurement precision of the diagonal vibration of the mercury ring is also ensured.

Description

technical field [0001] The invention relates to the field of angular velocity sensors, in particular to a mercury ring of a magnetic fluid angular velocity sensor and a bonding method thereof. Background technique [0002] The magnetic fluid angular velocity sensor is based on magnetohydrodynamics (MHD), which can measure angular velocity and angular displacement with high precision. It has the characteristics of miniaturization, wide frequency, and high stability. It is mainly used in high-precision satellite platforms and deep space optical communications. , high-resolution astronomical observation, and has broad application prospects in the field of civil vehicles and industrial processing and manufacturing. [0003] The mercury ring is the core component of the magnetic fluid angular velocity sensor. Using the inertia of the mercury, when the external angular vibration occurs, the mercury cuts the magnetic force line to generate an induced electromotive force, and the an...

Claims

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Application Information

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IPC IPC(8): G01C19/56G01P3/44B05D1/26
CPCG01C19/56G01P3/44B05D1/26
Inventor 胡雄超吴建铭符德华沈杰徐亚娟忽伟武斌陆建
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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