Study on the sensitive mechanism of thermal flow gyroscope

The effects of specific heat capacity, gas density, thermal conductivity of working gas, duty cycle and power of driving signal on the sensitivity of thermal flow gyroscope are investigated. The performance of gyroscope is optimized by setting the best parameters. By using finite element method and control variable method, the temperature field of the sensitive element is calculated by COMSOL software. The results show that the sensitivity of the gyroscope increases with the increase of the specific heat capacity of the working gas, and decreases with the increase of the density and thermal conductivity of the working gas. The optimal cycle of the driving signal and the optimal driving power are 60% and 0.1W, respectively. The sensitivity of the gyroscope increases by 3.02 times after optimization. This study lays a theoretical foundation for subsequent structural improvement and circuit design.