Non-contact drive detecting system and non-contact drive detecting method for cup-shaped harmonic oscillator of cup-shaped fluctuation gyro

Abstract

The invention relates to a non-contact drive detecting system and a non-contact drive detecting method for a cup-shaped harmonic oscillator of a cup-shaped fluctuation gyro. The non-contact drive detecting system comprises a harmonic oscillator, a rotary table, a supporting platform, a rotary table motor, a closed hood and two closed hood supporting seats, wherein the harmonic oscillator is fixedly connected onto the rotary table through a mounting base at the bottom of the harmonic oscillator; the rotary table is arranged on the supporting platform; the rotary table motor is used for driving the rotary table to rotate; two closed hood supporting seats are correspondingly and vertically arranged on two sides of the supporting platform; the closed hood is erected between upper parts of the two closed hood supporting seats by a rectangular rod; the closed hood covers the harmonic oscillator through an open cover at the bottom of the closed hood; six open holes are formed in the circumferential direction of the lower part of the closed hood; two electromagnets are correspondingly respectively arranged at two of the open holes; four microphone chips are correspondingly respectively arranged at the rest four open holes; the electromagnets are used for enabling the harmonic oscillator to generate resonance and exciting to obtain a driving mode; the microphone chips are used for detecting the vibration of nodal points and antinodal points of the harmonic oscillator. The non-contact drive detecting system and the non-contact drive detecting method disclosed by the invention have the advantages of low cost, higher precision and no damage to the harmonic oscillator.

Description

technical field [0001] The invention relates to a method for detecting a harmonic oscillator of a gyroscope, in particular to a non-contact drive detection system and method for a cup-shaped undulating gyro cup-shaped harmonic oscillator. Background technique [0002] The cup-shaped wave gyroscope is a new type of solid wave gyroscope, which uses the inertial effect of elastic waves in the cup-shaped structure to achieve angular velocity measurement. The cup-shaped wave gyroscope has the unique advantages of solid wave gyroscopes, such as high precision, low energy consumption, short preparation time, wide operating temperature range, strong resistance to ionizing radiation, good shock resistance and vibration resistance, and long service life. It has extremely broad development and application prospects. [0003] The working principle of the cup-shaped wave gyroscope is as follows: apply AC voltage to the four piezoelectric excitation electrodes perpendicular to each other ...

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Problems solved by technology

[0004] However, in the manufacturing process of the cup-shaped wave gyro, the processing error of the cup-shaped wave gyro resonator will lead to the mode shape shift and natural frequency cracking of the resonator, which directly affects the accuracy and sensitivity of the cup-shaped wave gyro

Under the existing conditions, the laser vibrometer can be used to measure the mode shape of the resonator, which has high precision but is expensive and inconvenient to operate; the performance of the resonator can also be tested by pasting piezoelectric electrodes, but if there is a problem, It is necessary to rearrange the piezoelectric electrodes, and the operation of repeatedly pasting the piezoelectric electrodes is complicated and easy to adversely affect the resonator

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