通过可动触点延长接触时间的新型微冲击开关

蔡豪刚;丁桂甫;杨卓青;周镇威;汪红

振动与冲击 ›› 2009, Vol. 28 ›› Issue (7) : 147-152.

PDF(865 KB)
PDF(865 KB)
振动与冲击 ›› 2009, Vol. 28 ›› Issue (7) : 147-152.
论文

通过可动触点延长接触时间的新型微冲击开关

  • 蔡豪刚,丁桂甫,杨卓青,周镇威,汪红
作者信息 +

A NOVEL MEMS SHOCK SWITCH WITH MOVABLE CONTACT POINT TO PROLONG THE CONTACT TIME

  • CAI Hao-gang, DING Gui-fu, Yang Zhuo-qing, ZHOU Zhen-wei, WANG Hong
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摘要

摘 要:基于非硅表面微加工技术,设计并制造了一种用于振动监测的新型微机电系统(MEMS)冲击开关。开关主要由三部分构成:作为可动电极的质量块,作为固定电极的十字梁,和位于质量块中心的具有延时作用的可动触点。通过ANSYS有限元仿真对器件进行模态分析,考察了器件的横向抗干扰能力;并提取了器件的物理参数(如弹簧弹性系数和系统有效质量),以用于Simulink动态仿真。通过动态仿真验证了器件的工作原理,并与传统微冲击开关进行了比较。使用落锤实验对所制造出的微冲击开关进行测试,加载波形为脉宽1ms的半正弦冲击加速度,测得其阈值约为145g,并且接触时间可稳定在50μs以上。测试结果与仿真符合较好,证明了新型设计可以有效地增强接触效果,所建模型可以较准确地描述器件的动态响应。

Abstract

Abstract: A novel shock switch based on the micro-electro-mechanical system (MEMS) for vibration monitoring was designed and fabricated by non-silicon surface micromaching technology, which consists of three main parts: the proof mass as the movable electrode, the cross beam as the stationary electrode and the movable contact point to prolong the contact time. The ANSYS model was built, by which the modal analysis was carried out showing that the new design reduces the sensitivity to off-axis accelerations compared with the previous design, and the physical parameters was extracted from geometric structure to apply in the Simulink model. Based on the dynamic simulation, the contact-enhancing mechanism was confirmed and compared with the traditional design. The fabricated micro shock switch was tested by dropping hammer experiment. Test results indicate that the threshold acceleration was about 145g and a stable contact time of over 50μs was observed under half-sine wave acceleration with 1ms duration, in agreement with the simulation. The contact effect was improved significantly as expected and the models were able to describe the device behavior correctly.

关键词

微冲击开关 / 微机电系统 / 可动触点 / 接触时间

Key words

MEMS / shock switch / movable contact point / contact time

引用本文

导出引用
蔡豪刚;丁桂甫;杨卓青;周镇威;汪红. 通过可动触点延长接触时间的新型微冲击开关[J]. 振动与冲击, 2009, 28(7): 147-152
CAI Hao-gang;DING Gui-fu;Yang Zhuo-qing; ZHOU Zhen-wei;WANG Hong. A NOVEL MEMS SHOCK SWITCH WITH MOVABLE CONTACT POINT TO PROLONG THE CONTACT TIME[J]. Journal of Vibration and Shock, 2009, 28(7): 147-152

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