As an essential component of ammunition, pyrotechnics can control ignition with high reliability. However, due to limits of fabrication technology, traditional pyrotechnics are bulky. To achieve both functionality and miniaturization, MEMS pyrotechnics integrate initiator, safety-and-arming (S&A) device and lead charge and keep all components within a small size. MEMS S&A devices, as the core component to ensure system safety, are difficult to achieve active and rapid response to control signals with high safety and reliability. In order to overcome the difficulty, we propose the design and characterization of a MEMS pyrotechnic with a double-layer barrier S&A device. The MEMS pyrotechnic is a high-integrated device with an overall size of 13.4 × 8.5 × 5.2 mm³. The initiator is a NiCr bridge foil covered with an Al/CuO energetic film, which can generate flame when ignited by an excitation voltage. To match the flame energy, lead styphnate is chosen in this study as the lead charge. The S&A device contains four semi-circular barriers, which are directly driven by V-shape electro-thermal actuators to gain active control of the pyrotechnics' ignition condition with rapid response. To improve the system's reliability, the four barriers are axisymmetrically placed in two layers, two barriers for each layer, to constitute a double-layer structure with a thickness of 100 μm. The ignition test results show that the S&A device can prevent the initiator from detonating the lead charge in safety condition. In arming condition, the lead charge will be detonated.

作为弹药的重要组成部分，烟火可以高可靠性地控制点火。然而，由于制造技术的限制，传统的烟火技术体积庞大。为了实现功能性和小型化，MEMS 烟火集成了启动器、安全和布防 (S&A) 设备和铅电荷，并将所有组件保持在小尺寸内。MEMS S&A器件作为保障系统安全的核心部件，难以实现对控制信号的主动快速响应，具有较高的安全性和可靠性。为了克服这一困难，我们提出了具有双层屏障 S&A 装置的 MEMS 烟火装置的设计和表征。MEMS烟火是一种高度集成的器件，整体尺寸为13.4 × 8.5 × 5.2 mm ³. 引发剂是覆盖有 Al/CuO 高能膜的 NiCr 桥箔，当被激发电压点燃时会产生火焰。为了匹配火焰能量，在本研究中选择了铅作为铅装料。S&A装置包含四个半圆形屏障，由V型电热执行器直接驱动，以快速响应主动控制烟火的点火条件。为了提高系统的可靠性，将四个屏障轴对称放置在两层中，每层两个屏障，构成厚度为100μm的双层结构。点火试验结果表明，S&A装置可以防止起爆器在安全条件下引爆先导装药。在武装状态下，铅炸药将被引爆。