• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2022, Vol. 58 ›› Issue (17): 206-214.doi: 10.3901/JME.2022.17.206

• 数字化设计与制造 • 上一篇    下一篇

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微火工品用高结构强度MEMS安保装置

胡腾江1, 任炜1,2, 赵玉龙1, 王柯心1   

  1. 1. 西安交通大学机械制造系统工程国家重点实验室 西安 710049;
    2. 陕西应用物理化学研究所应用物理化学重点实验室 西安 710061
  • 收稿日期:2021-09-11 修回日期:2022-04-16 发布日期:2022-11-07
  • 作者简介:任炜,男,1982年出生,硕士,高级工程师。主要研究方向为MEMS火工技术。E-mail:rw0192@163.com;赵玉龙,男,1968年出生,博士,教授。主要研究方向为MEMS器件设计。E-mail:zhaoyulong@xjtu.edu.cn;王柯心,男,1997年出生,博士研究生。主要研究方向为MEMS火工品技术。E-mail:wkx741565@stu.xjtu.edu.cn

Research on High Structural Strength MEMS S & A Device for Micro Initiator

HU Tengjiang1, REN Wei1,2, ZHAO Yulong1, WANG Kexin1   

  1. 1. State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an 710049;
    2. Science and Technology on Applied Physical Chemistry Laboratory, Shaanxi Applied Physics and Chemistry Research Institute, Xi'an 710061
  • Received:2021-09-11 Revised:2022-04-16 Published:2022-11-07
  • Contact: 中国博士后科学基金(2018M640977)和中央高校基本科研业务专项资金(xzy012019004)资助项目。

摘要: 为了在保证MEMS(Micro-electro-mechanical-system)安保装置高精度特征的同时大幅提高器件的结构强度,开展了具有金属/硅基复合结构的高强度MEMS安保装置研究。该MEMS安保装置以硅基为基础,通过在硅隔板上方制作金属增强层,解决了器件高精度与高强度的技术矛盾。该MEMS安保装置采用电热原理实现驱动,在11 V特定周期信号的作用下,器件可以在0.9 s内产生1 mm的往复位移,实现了对安保状态的主动控制。起爆隔爆测试结果表明,在解保状态下,复合隔板未对飞片的飞行状态产生影响,飞片可以顺利飞出;在安全状态下,复合隔板与飞片直接碰撞,硅隔板发生破碎但金属隔板保持完整。在金属隔板的限制下,破碎的硅不会飞出形成二次飞片,因此,有效提高了器件的结构强度,确保了MEMS安保装置良好的隔爆性能。MEMS安保装置的整体尺寸为8 mm×15 mm×0.75 mm,最小线宽为5 μm,抗过载能力为10 000 g。该MEMS安保装置具备微型化、集成化特征。

关键词: MEMS安保装置, 金属/硅基复合隔板, 电热驱动, 状态恢复

Abstract: In order to enhance the fabrication precision and the structural strength of MEMS S&A (Micro-Electro-Mechanical-System Safety-and-Arming)device simultaneously, a novel MEMS S&A device with the metal/silicon composite barrier has been introduced. The device is mainly based on the silicon substrate. By designing the reinforce metal layer on the silicon barrier, the technical contradiction between structural precision and strength can be solved. Based on the electro-thermal principle, the MEMS S&A device can generate 1 mm bi-direction displacement in 0.9 s to achieve status conversion. The detonation tests results show that: Under the armed mode, the flyer can fly out smoothly; Under the safe mode, the flyer will hit the composite barrier directly. The silicon part is broken, but the metal part remains intact. Confined by the metal part, the broken silicon will not fly out to form a secondary flyer. Therefore, the structural strength of the device is effectively improved. The total size of MEMS S&A device is 8 mm×15 mm× 0.75 mm, the minimum structure width is 5 μm, and the anti-overload ability is 10 000 g. This MEMS S&A device characterizes miniaturization and integration.

Key words: MEMS S & A device, metal/silicon composite barrier, electro-thermal actuation, status recovery

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