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兵工学报 ›› 2022, Vol. 43 ›› Issue (8): 1998-2006.doi: 10.12382/bgxb.2021.0464

• 论文 • 上一篇    下一篇

d31模式四悬臂梁压电MEMS加速度计

石树正1,2, 耿文平1, 刘勇3, 毕开西1, 李芬1, 丑修建1   

  1. (1.中北大学量子传感与精密测量山西省重点实验室, 山西 太原 030051;2. 河北建筑工程学院机械工程学院, 河北 张家口 075000;3.安徽埃克索医疗机器人有限公司, 安徽 巢湖 238008)
  • 上线日期:2022-05-30
  • 通讯作者: 耿文平(1985—),男,副教授,博士 E-mail:wenpinggeng@nuc.edu.cn
  • 作者简介:石树正(1984—),男,博士研究生。E-mail: shishuzheng2000@163.com
  • 基金资助:
    国家自然科学基金项目(62171415、51975542、51975541);河北省“三三三人才工程”资助项目(A202101021、C20221029);河北省高校基本科研业务费项目(2022QNJS01);河北省创新创业训练计划项目(202210084005)

Piezoelectric MEMS Accelerometer With d31 Mode Cantilever Structure

SHI Shuzheng1,2, GENG Wenping1, LIU Yong3, BI Kaixi1, LI Fen1, CHOU Xiujian1   

  1. (1.Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement, North University of China, Taiyuan 030051,Shanxi, China; 2.College of Mechanical Engineering, Hebei University of Architecture and Engineering, Zhangjiakou 075000,Hebei,China; 3.Anhui AKSO Medical Robot Co., Ltd., Chaohu 238008, Anhui, China)
  • Online:2022-05-30

摘要: 针对高灵敏度无源加速度计的集成制造需求,提出一种d31工作模式下四悬臂梁集成拾振微球的MEMS压电加速度计敏感结构。建立动力学振动和拾振理论模型,并使用COMSOL 5.0软件对传感器件结构进行建模仿真,通过优化确定满足拾振条件的微器件几何尺寸和结构。利用溶胶凝胶方法实现硅基高品质PZT压电薄膜的异质集成制造,使用MEMS工艺制造微器件并完成传感器的集成和组装。测试结果表明:该加速度计的输入加速度与输出电压的关系为V=1.881a-0.033,电压灵敏度在1 152 Hz时达到13.8 mV/g,表现出良好的灵敏度、线性度和抗干扰能力;新方法具有正确性和工艺方法的可行性,为高性能加速度传感器件提供了一种新的技术途径。

关键词: 微机电系统, d31压电加速度计, 灵敏度, 拾振微球, 锆钛酸铅

Abstract: To meet the requirements for integrated manufacturing of highly sensitive passive accelerometers, a MEMS piezoelectric accelerometer sensitive structure with four integrating cantilevers picking up microsphere under d31 operating mode is proposed. The theoretical models of dynamic vibration and vibration picking are established, and the structure of the sensor is modeled and simulated by COMSOL 5.0 software. The geometric size and structure of the micro-device satisfying vibration picking conditions are determined by optimization. Heterogeneous integrated fabrication of high-quality PZT piezoelectric thin film based on silicon is realized by sol-gel method. Micro-device is fabricated by MEMS process and the sensor is assembled. The test results show that the relationship between the input acceleration and the output voltage of the accelerometer is V=1.881a-0.033 and the voltage sensitivity reaches 13.8 mV/g at 1 152 Hz, exhibiting good sensitivity, linearity, and anti-interference capability. The correctness of the research method and the feasibility of the manufacturing process are verified, providing a new technological approach for the high-performance acceleration sensor.

Key words: micro-electro-mechanicalsystem, d31piezoelectricaccelerometer, sensitivity, vibration-pickingmicrosphere, leadzirconatetitanate

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