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首页> 外文期刊>Journal of Solid Mechanics and Materials Engineering >Development of Simultaneous Measurement System for Strain and AE Using FBG Sensors for Structural Health Monitoring of Solid Rocket Motor Composite Chamber
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Development of Simultaneous Measurement System for Strain and AE Using FBG Sensors for Structural Health Monitoring of Solid Rocket Motor Composite Chamber

机译：利用FBG传感器进行固体火箭发动机复合腔结构健康监测的应变和声光同时测量系统的开发。

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A structural health monitoring system using multiple fiber Bragg grating sensors (FBG sensors) was developed. The system was designed to measure a large and fast strain change and to measure acoustic emissions (AE) simultaneously. The strain up to 1% and up to 100 kHz was considered. A multiple fiber ring laser was adopted as a light source, consisted of a multiple erbium-doped fiber amplifier (EDFA), an optical circulator, optical couplers, and FBG sensors. Its lasing wavelengths depended on strains loaded to FBG sensors. A CFRP beam-bending test was conducted to confirm the possibility of simultaneous measurement of both strain and AE signals from a single FBG sensor. In the test, signals from a conventional electric resistive strain gage and a piezoelectric AE sensor were revealed to be equivalent to those from the FBG sensor, respectively. The system will be applied to the development of composite structures in the aerospace field, such as Epsilon Launch Vehicle.
机译：开发了使用多个光纤布拉格光栅传感器（FBG传感器）的结构健康监测系统。该系统旨在测量大而快速的应变变化，并同时测量声发射（AE）。考虑到高达1％和高达100 kHz的应变。采用多光纤环形激光器作为光源，由多掺-光纤放大器（EDFA），光环行器，光耦合器和FBG传感器组成。它的发射波长取决于加载到FBG传感器上的应变。进行了CFRP光束弯曲测试，以确认同时测量来自单个FBG传感器的应变和AE信号的可能性。在测试中，显示出来自常规电阻应变计和压电AE传感器的信号分别与来自FBG传感器的信号相同。该系统将用于航空航天领域的复合结构的开发，例如Epsilon运载火箭。

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