Abstract
In this study, a graphene beam was selected as a sensing element and used to form a graphene resonant gyroscope structure with direct frequency output and ultrahigh sensitivity. The structure of the graphene resonator gyroscope was simulated using the ANSYS finite element software, and the influence of the length, width, and thickness of the graphene resonant beam on the angular velocity sensitivity was studied. The simulation results show that the resonant frequency of the graphene resonant beam decreased with increasing the beam length and thickness, while the width had a negligible effect. The fundamental frequency of the designed graphene resonator gyroscope was more than 20 MHz, and the sensitivity of the angular velocity was able to reach 22,990 Hz/°/h. This work is of great significance for applications in environments that require high sensitivity to extremely weak angular velocity variation.
Highlights
Resonant gyroscopes with direct frequency output can directly convert a weak Coriolis angular velocity into a frequency-modulated wave by frequency modulation and demodulate a frequency-modulated wave to calculate the input angular velocity
The birth of graphene materials makes it possible to develop a resonant gyroscope with a direct frequency output that is sensitive to ultraweak angular velocity variation
In 2015, Kang et al conducted a study on the dynamic characteristics of an accelerometer based on a suspended cross-type graphene resonator; its theoretical model is shown in Figure 2 [11]
Summary
Resonant gyroscopes with direct frequency output can directly convert a weak Coriolis angular velocity into a frequency-modulated wave by frequency modulation and demodulate a frequency-modulated wave to calculate the input angular velocity. In 2015, Kang et al conducted a study on the dynamic characteristics of an accelerometer based on a suspended cross-type graphene resonator; its theoretical model is shown in Figure 2 [11]. University developed a single-layer with sensitivity characteristics for detecting acceleration was obtained [12].graphen nator with an electrical readout. The research group experimentally tested the va of the resonant frequency of the graphene resonator with the additional mass, e temperature, and voltage of the silicon electrodes [7]. 2013, Natsuki et al studied a graphene resonant nanomass sensor using continuous theory in which a double-layer graphene diaphragm was used as the resonator [. By simulating the influence of the length, width, and thickness of the graphene resonant beam on the resonant frequency of the gyroscope sensor, an optimized finite element simulation structure for the graphene resonant gyroscope was obtained
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