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无基底焦平面阵列结构优化设计及性能分析
  • 期刊名称：实验力学
  • 时间：0
  • 页码：673-681
  • 语言：中文
  • 分类：O32[理学—一般力学与力学基础;理学—力学] TB33[一般工业技术—材料科学与工程]
  • 作者机构：[1]中国科学技术大学近代力学系中国科学院材料力学行为与设计重点实验室,合肥230027
  • 相关基金：国家自然科学面上基金（批准号：10872191）和重点基金（批准号：10732080）资助,致谢：感谢廖国江同学对本文实验工作所提供的无私帮助.
  • 相关项目：微纳尺度实验力学中的传感、测量、识别新方法研究
作者： 陈焕斌|程腾|张青川|毛亮|高杰|蒋兴凯|史海涛|
关键词： FPA, 无基底, 加强梁, 固有频率, FPA, substrate-free, strengthened beam, inherence frequency
中文摘要：

基于光学读出非制冷红外成像技术,本文作者提出并成功设计制作了无基底焦平面阵列结构（Focal Plane Array,FPA）,不仅简化了制作工艺,而且大幅提升了成像性能。但由于其为单层膜结构,固有频率值低,可能会引起热机械振动噪声（NETDTM）,导致噪声等效温度差（NETD）上升。为解决这一问题,本文提出两种改进的加强梁结构,借助有限元简化模型和激光位移传感器,通过数值模拟和实验验证,证实这两种结构可以大幅度提高FPA固有频率值（分别从74Hz提升至835Hz和404Hz）,NETDTM降低约两个数量级,从而实现了对FPA的优化设计。

英文摘要：

A substrate-free focal plane array （FPA） was proposed and fabricated successfully by authors of this paper based on optical-readout uncooled infrared imaging technique. It has not only simplified the production process,but also improved the infrared imaging quality. However,it is susceptible to mechanical noise （NETDTM） due to the low inherence frequency of monolayer membrane structure,which could lead to the raise of noise equivalent temperature difference （NETD）. In order to solve the problem,two kinds of improved structure with strengthened beam were proposed. These two structures were proved to have a significantly increase of inherence frequency （from 74Hz to 835Hz and 404Hz respectively） and reduce NETDTM by two orders of magnitude based on finite element analysis and experimental results by using simplified model and laser displacement sensor,which consequently carry out the structural optimization of FPA.

同期刊论文项目
微梁传感技术在生化领域应用的基础研究
期刊论文 16 会议论文 20
微纳尺度实验力学中的传感、测量、识别新方法研究
期刊论文 140 会议论文 38 获奖 2
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