学术数据库优秀期刊 《中文科技期刊数据库》来源期刊

To address the reliability assessment blind spot caused by the “non-inspectable and non-repairable” nature of unit pyrotechnic devices throughout their life cycle, this paper presents a in-situ monitoring technique based on embedded microelectromechanical systems (MEMS) sensors that requires no interface modification. A dual-bridge, four-pin electric detonator is employed as the host platform. SOI piezoresistive pressure microsensors and semiconductor bridge (SCB) ignition chips are co-mounted into the symmetric dual cavities of the electrode plug. Calibration results show that the pressure sensor achieves a sensitivity of 1.636 mV·MPa-1 with linearity R2≥0.999 over the 0~5 MPa range. Under a safe current of 1 A, a transient pressure peak of 1.3 MPa, attributed to thermo-solid expansion, was observed for the first time, revealing the constrained stress mechanism at the bridge-energetic material interface. During ignition (5 A), the embedded sensor records a peak pressure of 21.7 MPa, approximately 6 MPa higher than that measured by a conventional side-mounted reference sensor, with a response lag of less than 0.3 ms. This approach upgrades reliability evaluation from indirect electrical indicators (e.g., bridge resistance) to direct physical measurements of temperature and pressure. With advantages such as interface compatibility, functional scalability, and batch manufacturability, the proposed method offers a versatile and practical solution for health monitoring and data-driven design of pyrotechnic devices.