首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >An Improved Metal-Packaged Strain Sensor Based on A Regenerated Fiber Bragg Grating in Hydrogen-Loaded Boron–Germanium Co-Doped Photosensitive Fiber for High-Temperature Applications
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An Improved Metal-Packaged Strain Sensor Based on A Regenerated Fiber Bragg Grating in Hydrogen-Loaded Boron–Germanium Co-Doped Photosensitive Fiber for High-Temperature Applications

机译:一种改进的基于再生光纤布拉格光栅的含氢硼-锗共掺杂光敏光纤中的金属包装应变传感器用于高温应用

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摘要

Local strain measurements are considered as an effective method for structural health monitoring of high-temperature components, which require accurate, reliable and durable sensors. To develop strain sensors that can be used in higher temperature environments, an improved metal-packaged strain sensor based on a regenerated fiber Bragg grating (RFBG) fabricated in hydrogen (H2)-loaded boron–germanium (B–Ge) co-doped photosensitive fiber is developed using the process of combining magnetron sputtering and electroplating, addressing the limitation of mechanical strength degradation of silica optical fibers after annealing at a high temperature for regeneration. The regeneration characteristics of the RFBGs and the strain characteristics of the sensor are evaluated. Numerical simulation of the sensor is conducted using a three-dimensional finite element model. Anomalous decay behavior of two regeneration regimes is observed for the FBGs written in H2-loaded B–Ge co-doped fiber. The strain sensor exhibits good linearity, stability and repeatability when exposed to constant high temperatures of up to 540 °C. A satisfactory agreement is obtained between the experimental and numerical results in strain sensitivity. The results demonstrate that the improved metal-packaged strain sensors based on RFBGs in H2-loaded B–Ge co-doped fiber provide great potential for high-temperature applications by addressing the issues of mechanical integrity and packaging.
机译:局部应变测量被认为是对高温部件进行结构健康监测的有效方法,该方法需要精确,可靠和耐用的传感器。为了开发可在高温环境中使用的应变传感器,一种改进的金属封装应变传感器,基于再生纤维布拉格光栅(RFBG)制成,该光栅由氢(H2)负载的硼锗(B–Ge)共掺杂光敏材料制成光纤是采用磁控溅射和电镀相结合的工艺开发的,解决了二氧化硅光纤在高温退火后再生后机械强度下降的局限性。评估了RFBG的再生特性和传感器的应变特性。使用三维有限元模型进行传感器的数值模拟。在用H2负载的B-Ge共掺杂光纤中写入的FBG,观察到两种再生方式的异常衰减行为。当暴露在高达540°C的恒定高温下时,应变传感器具有良好的线性,稳定性和可重复性。实验结果和数值结果之间在应变敏感性方面获得了令人满意的协议。结果表明,改进的基于RFBG的金属封装应变传感器可在H2负载的B-Ge共掺杂光纤中解决机械完整性和封装问题,为高温应用提供巨大潜力。

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