A Multi-Fork Z-Axis Quartz Micromachined Gyroscope

作者：Feng Lihui^*; Zhao Ke; Sun Yunan; Cui Jianmin; Cui Fang; Yang Aiying

来源：Sensors, 2013, 13(9): 12482-12496.

DOI：10.3390/s130912482

• quartz micromachined gyroscope
• multi-fork
• coriolis force
• anisotropic etching

A novel multi-fork z-axis gyroscope is presented in this paper. Different from traditional quartz gyroscopes, the lateral electrodes of the sense beam can be arranged in simple patterns; as a result, the fabrication is simplified. High sensitivity is achieved by the multi-fork design. The working principles are introduced, while the finite element method (FEM) is used to simulate the modal and sensitivity. A quartz fork is fabricated, and a prototype is assembled. Impedance testing shows that the drive frequency and sense frequency are similar to the simulations, and the quality factor is approximately 10,000 in air. The scale factor is measured to be 18.134 mV/(degrees/s) and the nonlinearity is 0.40% in a full-scale input range of +/- 250 degrees/s.

• 出版日期2013-9
• 单位北京理工大学