A Cylindrical Shell Coriolis Vibrating Gyroscope with Electrostatic Excitation and Detection

Abstract

The invention discloses a cylindrical shell Coriolis vibratory gyro based on electrostatic excitation and detection, and relates to the technical field of inertial devices. The cylindrical shell Coriolis vibratory gyro based on electrostatic excitation and detection includes a cylindrical shell resonator, an electrostatic excitation and detection integrated top cover, a gyro sealing shell, a gyrobuffer circuit board, a gyro electrode outgoing line and a gyro support outer wall; the electrostatic excitation and detection integrated top cover is fixedly arranged below the gyro buffer circuit board in a parallel manner; the electrostatic excitation and detection integrated top cover is fixedly connected with the gyro buffer circuit board through the gyro electrode outgoing line; the cylindrical shell resonator is fixedly arranged below the electrostatic excitation and detection integrated top cover; the gyro support outer wall is a hollow cylinder structure, and the gyro support outer wall coaxially sleeves between the lower surface of the electrostatic excitation and detection integrated top cover and the upper surface of the bottom surface of the cylindrical shell resonator; and the gyro sealing shell is arranged outside the gyro support outer wall. The cylindrical shell Coriolis vibratory gyro based on electrostatic excitation and detection has the advantages of simple structure, high vibration Q value, achieving of the high measurement precision through using an electrostatic excitation and electrostatic detection manner, and easiness in processing and assembling.

Description

technical field [0001] The invention relates to the technical field of inertial devices, in particular to a cylindrical shell Coriolis vibrating gyroscope for electrostatic excitation and detection. Background technique [0002] Gyroscopes are inertial devices that measure the rotational angular velocity or angle of moving objects, and play a pivotal role in satellite platforms, tactical guided weapons, inertial navigation, unmanned driving and other fields. With the development of technology in various application fields, the inertial measurement system puts forward higher and higher requirements for the accuracy, volume, power consumption, cost and other indicators of the gyroscope. The Coriolis vibrating gyroscope is a solid vibrating gyroscope based on the Coriolis effect. It has excellent characteristics such as simple structure, high precision, small size, light weight, low cost, and high reliability. It is used in tactical weapons, inertial navigation, micro-nano Sat...

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Problems solved by technology

[0003] Patents US4157041, US3644972, US5712427, etc. proposed a quartz hemispherical resonant gyro. The resonator adopts a hemispherical shell structure and is made of high-Q high-purity fused silica material. The excitation cover and the detection base are respectively made, and the resonator is precisely assembled. Hemispherical resonant gyroscope, the structure of the gyroscope is complicated, the assembly precision is extremely high, and the cost is high

[0004] The patent CN102254058A and the paper "Research on Key Technology of Cup-shaped Wave Gyroscope" proposed a bell-shaped or cylindrical shell-shaped vibrating gyroscope based on piezoelectric excitation and detection. A piezoelectric ceramic sheet is pasted on the bottom of the cylindrical shell for excitation and signal detection. The Q value of the metal vibrating gyroscope is low, and due to the poor detection accuracy of piezoelectricity, the gyroscope’s accuracy index is low.

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