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高灵敏度的压电MEMS加速仪用于矢量水电话.

Shuzheng Shi1,2, Liyong Ma1, Kai Kang1

  • 1School of Mechanical Engineering, Hebei University of Architecture, Zhangjiakou 075000, China.

Micromachines
|August 26, 2023
PubMed
概括

一个新的压电MEMS加速度计 (PMA) 为矢量水声机提供了高灵敏度. 这种轻量级的设备表现出卓越的性能,为先进的水下声学传感应用铺平了道路.

关键词:
悬臂梁梁可以使用.微电子机械系统 微电子机械系统压电加速度计是一种压电加速度计.灵敏度 灵敏度 灵敏度 灵敏度 灵敏度载波式水电话 载波式水电话

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科学领域:

  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程
  • 电气工程 电气工程
  • 声学 声学 在声学方面

背景情况:

  • 越来越多的需求对高灵敏度的加速度计在矢量声器.
  • 现有的加速度计技术在水下应用中的局限性.
  • 需要轻量级,灵敏和强大的振动传感元件.

研究的目的:

  • 提出和开发一种新的压电MEMS加速度计 (PMA).
  • 为了优化PMA设计,以增强振动采集能力.
  • 为了将PMA集成到压电向量水电话 (PVH) 中,并评估其性能.

主要方法:

  • 压电悬臂光束能量采集的理论建模.
  • 微设备几何尺寸和结构的优化.
  • 使用sol-gel制造PMA,并通过MEMS技术在基板上对PZT薄膜进行化.
  • 在振动测量平台上包装和测试PMA.
  • 将PMA集成到PVH中,用于校准系统中的测试.

主要成果:

  • 该PMA的共振频率为2300赫兹.
  • 观察到输入加速度和输出电压 (V = 8.412a - 0.212) 之间的线性关系.
  • 该PMA表现出高灵敏度和卓越的抗干扰能力.
  • 集成的PVH实现了178.99 dB@1000 Hz的灵敏度和20-1100 Hz的带宽.
  • PVH显示出良好的"8"形状定向性和通道一致性.

结论:

  • 开发的压电MEMS加速度计具有用于矢量水电声应用的卓越功能.
  • PMA的高灵敏度,线性响应和强度使其适合要求水下声学传感.
  • 成功融入PVH验证了PMA在先进水声系统方面的潜力.