Fabrication of a high-g micro impact switch
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摘要: 采用微机电系统(MEMS)技术设计制作了一种微冲击开关,其敏感元件由悬臂梁支撑的质量块和其下的微触点构成。在冲击加速度作用下,质量块与触点碰撞实现接通。开关芯片体积为5 mm5 mm0.5 mm,动作门限3 000g,响应时间84 s,能承受极端的高冲击而不破坏。Abstract: The impact switch is a kind of inertial device that can sense impact acceleration and output on-off signal. A micro-mechanical impact switch is designed and fabricated with MEMS technology. The sensitive unit of the micro impact switch consists of a seismic mass supported with a cantilever beam. The movable mass is displaced to contact the micro electrode tip when subjected to impact acceleration. The chip size of the switch is 5 mm5 mm0.5 mm and the switch threshold is 3 000g while the response time is 84 s. It can survive ultra-high g-loads impact.
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Key words:
- solid mechanics /
- impact response /
- MEMS /
- impact switch /
- high-g level
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