CAJ | 학술논문

设计了一个新型的结构完全对称的双向MEMS电容式惯性传感器.该传感器主要由可动质量块、栅形条、支撑梁、连接梁、阻尼调整梳齿组成.设计的结构采用变电容面积的检测方式,在降低空气阻尼的同时也降低了对DRIE工艺的要求,并通过加大测试信号电压来降低电路噪声,从而提高传感器的分辨率.用有限元工具ANSYS详细讨论了传感器的参数和性能,并模拟验证了设计的双向传感器的交叉效应近似为零.制作了滑膜阻尼测试器件,在大气压下,测得的品质因子可达514,验证了该结构设计可以提高传感器的分辨率和该工艺设计的可行性.
설계료일개신형적결구완전대칭적쌍향MEMS전용식관성전감기.해전감기주요유가동질량괴、책형조、지탱량、련접량、조니조정소치조성.설계적결구채용변전용면적적검측방식,재강저공기조니적동시야강저료대DRIE공예적요구,병통과가대측시신호전압래강저전로조성,종이제고전감기적분변솔.용유한원공구ANSYS상세토론료전감기적삼수화성능,병모의험증료설계적쌍향전감기적교차효응근사위령.제작료활막조니측시기건,재대기압하,측득적품질인자가체514,험증료해결구설계가이제고전감기적분변솔화해공예설계적가행성.
A novel capacitive biaxial microaccelerometer with a highly symmetrical microstructure is developed. The sensor is composed of a single seismic mass, grid strip, supporting beam,joint beam, and damping adjusting combs. The sensing method of changing capacitance area is used in the design, which depresses the requirement of the DRIE process, and de-creases electronic noise by increasing sensing voltage to improve the resolution. The parameters and characteristics of the biaxial microaccelerometer are discussed with the FEM tool ANSYS. The simulated results show that the transverse sensi-tivity of the sensor is equal to zero. The testing devices based on the slide-film damping effect are fabricated, and the tes-ting quality factor is 514, which shows that the designed structure can improve the resolution and proves the feasibility of the designed process.