Novel quartz glass pendulous reed

Abstract

The invention relates to a novel quartz glass pendulous reed. The novel quartz glass pendulous reed comprises a round support ring, two flexible support beams and a pendulous tongue which swings freely, wherein the two flexible support beams are to an axis in parallel; the pendulous reed is connected with the round support ring through the flexible support beams; three mounting positioning bossesare arranged on the round support ring; the three mounting positioning bosses are symmetrically distributed along a vertical axis; a vent hole is coaxially formed in the center of the round support ring; an isolation groove is formed in the round support ring between the vent hole and the flexible support beams; the isolation groove is coaxial with the vent hole; an opening is formed in the isolation groove; the direction of the opening is far away from the two flexible support beams and is left-right symmetrical. The novel quartz glass pendulous reed is put forward at home for the first time.By adoption of the structure form, the pendulous reed has the advantages of remarkably reducing the temperature sensitivity, improving the survival rate of the assembling process and improving the long-term stability of accelerometers when being compared with the original traditional structure, and can be applied to NJS / A type quartz accelerometers.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a novel quartz glass pendulum for a flexible quartz accelerometer, which is a core component for realizing high-precision acceleration measurement. Background technique [0002] Quartz flexible accelerometer is a high-precision sensor for measuring acceleration and is an important part of the inertial system. The quartz glass pendulum is the core part of the accelerometer. The thickness of the flexible beam of the quartz pendulum is only 0.03mm, which is a key part for sensitive detection of quality and resulting in flexible displacement. The quartz flexible accelerometer was first successfully developed by the American Sentistein Company in the 1970s. The specific structure is described in detail in the US Patent (Patent No. 4250757). The structure is as follows figure 1 as shown, figure 1 is a 3D exploded view of a quartz flexible accelerometer. [0003] The working principl...

AI Technical Summary

Problems solved by technology

[0005] At present, due to the limitation of cost and processing difficulty, the material of the coil frame is generally aluminum alloy, and its expansion coefficient is quite different from that of quartz glass. The deformation of the skeleton is greater than that of the quartz glass pendulum. Due to the mismatch of deformation, stress will inevitably be generated at the bonding surface of the pendulum component and spread to the surroundings.

Although the stress can be partially relieved by the adhesive layer through deformation, it cannot be completely eliminated

The unrelieved stress is transmitted through the bonding surface, which will eventually affect the flexible beam, resulting in errors in the detection of sensitive masses, and ultimately cause measurement errors in the accelerometer

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