双层CMUT的结构优化设计具有低功耗和高超声波接收性能
Jie Li1,2,3,4, Zhaohui Xiao1,5, Zutang Wu2
1The College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
Micromachines
|July 30, 2025
概括
一个新的双层电容微机超声波传感器 (CMUT) 设计提高了性能,降低了功耗. 这项创新提高了偏移和灵敏度,使CMUT适用于便携式设备和空气合超声波测试.
科学领域:
- 微电子机械系统 (MEMS) 是一种微电子机械系统.
- 声学转导是一种声学转导.
- 超声波设备 超声波设备
背景情况:
- 容量型微机超声波传感器 (CMUT) 对于非破坏性测试和3D成像等应用至关重要.
- 现有的CMUT在平衡低功耗与高性能方面面临挑战.
- 这种限制阻碍了它们在电力敏感和高需求领域的使用.
研究的目的:
- 引入和分析一种新的双层CMUT结构.
- 优化设计以提高性能和降低功耗要求.
- 为了研究这种设计对于先进的超声波应用的潜力.
主要方法:
- 一个双层CMUT架构被概念化,整合了顶层的圆形和底层的环状细胞.
- 一个可移动的支柱被整合起来连接两个层,增强膜的偏移和减少度.
- 用有限元法 (FEM) 模拟来分析结构和性能特征.
主要成果:
- 与传统设计相比,双层CMUT的倒塌电压降低了13.7%.
- 在最大屈曲率 (41.2%),平均屈曲率 (68.0%) 和机电合系数 (84.6%) 中观察到显著改善.
- 传输灵敏度增加了17.7%,接收灵敏度显著提高了101.6%.
结论:
- 拟议的双层CMUT设计有效地实现了低功耗和高接收性能,同时保持了传输能力.
- 这种优化的结构为便携式低功耗设备和空气合超声波非破坏性测试提供了有前途的解决方案.
- 设计的进步为更高效和多功能超声波传感器应用铺平了道路.
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