Hemispherical resonator mandrel vibration detection circuit and device

Abstract

The invention belongs to the field of hemispherical resonant gyroscopes, and particularly relates to a hemispherical resonator mandrel vibration detection circuit and a hemispherical resonator mandrelvibration detection device. The hemispherical resonator mandrel vibration detection circuit comprises a plurality of pairs of interdigital electrodes arranged around a hemispherical resonator mandrel, wherein each pair of interdigital electrodes and the hemispherical resonator mandrel locally form a detection capacitor; each detection capacitor is connected with a voltage detection circuit; eachvoltage detection circuit comprises an operational amplifier and an operational amplifier capacitor; two ends of each operational amplifier capacitor are connected to an inverting end and an output end of the corresponding operational amplifier respectively; one interdigital electrode of each detection capacitor applies a constant voltage, the other interdigital electrode of the detection capacitor is connected with the inverting end of the corresponding operational amplifier, and the non-inverting end of the operational amplifier is grounded; and an output end of each operational amplifier outputs an operational amplifier output voltage, and whether the mandrel vibrates or not is judged according to whether the voltage is changed or not. The hemispherical resonator mandrel vibration detection circuit and the hemispherical resonator mandrel vibration detection device are simple in structure, and can detect the vibration condition of the mandrel in a non-contact manner.

Description

technical field [0001] The invention relates to vibration excitation and detection of a quartz resonant oscillator of a hemispherical resonant gyroscope, which is used for quality leveling of the hemispherical resonant gyroscope, and belongs to the field of hemispherical resonant gyroscopes. Background technique [0002] Hemispherical resonant gyroscope is an all-solid-state vibrating gyroscope, which is made of high-quality fused silica glass material through precise machining and complex auxiliary processes. The hemispherical resonant gyro has the advantages of high reliability, high precision, long life, and strong radiation resistance, especially its unique working life of more than 15 years, making it very suitable for space applications such as space vehicles and satellites , is the preferred gyroscope for aerospace high-reliability applications. [0003] An ideal hemispherical harmonic oscillator is a completely axisymmetric umbrella structure, such as image 3 As sh...

AI Technical Summary

Problems solved by technology

A key technology in mass leveling is how to detect the vibration of the mandrel, because the mass imbalance of some modes will cause the mandrel to vibrate, and the amplitude and direction of the mandrel vibration can be detected, which in turn can determine the mass imbalance position and measurement, thus providing a basis for leveling; and there is no suitable solution in the prior art to test the vibration of the hemispherical resonator core shaft

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