Effect of Different Heating Methods on the Sensitivity of Thermal Expansion Gyroscopes

In this paper, a thermal expansion gyro was proposed, its sensitive mechanism was studied, and the effect of its heating method on sensitivity was explored. A 2D model of the structure was created by COMSOL, and finite element analysis was performed on it. The results show that: The input power is 5mW, when the input angular velocity range is - 400(°)/s~400(°)/s, The temperature sensitivity of the proposed complementary square wave thermal expansion gyro and DC loaded thermal expansion gyro are 6.39 mK·[(°)/s]
^-1
and 0.621 mK·[(°)/s]
^-1
. The sensitivity is respectively 2.39 mV·[(°)/s]
^-1
and 0.232 mV·[(°)/s]
^-1
. The nonlinearities are respectively 14.5% and 14.3%, which has a gyroscopic effect; Complementary square wave heating method with greater sensitivity. The gyro sensitivity is improved compared to the previous structure. The high-sensitivity thermal expansion gyro has the advantages of strong impact resistance, low production cost, simple process, and high reliability, and can be used in aerospace, consumer electronics, military and other fields.