概括
一个新的纤维布拉格格 (FBG) 应变传感器有效地弥补温度变化. 这项创新确保了99%以上的精度在应变测量,对于结构性健康监测至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 光学传感传感器是什么?
- 机械工程 机械工程
背景情况:
- 应变和温度之间的交叉敏感性是纤维布拉格格 (FBG) 传感的一个重大挑战.
- 粘合剂热膨胀不匹配可以放大包装的FBG应变传感器中的温度效应.
研究的目的:
- 开发一个专门设计的FBG应变传感器,具有广泛的温度补偿.
- 解决包装的FBG应变传感器中放大温度效应的问题.
主要方法:
- 制作一个紧的FBG应变传感器 (18毫米长,0.35克重量).
- 实验测试以确定应变和温度的敏感性.
- 补偿后分析,以评估测量的准确性.
主要成果:
- 传感器的应变灵敏度为1.35分钟/米,具有很高的线性 (R2 = 0.99951).
- 在 -50 °C至150 °C范围内,温度感应度为29.8 pm/°C (R2 = 0.9979).
- 在消除温度干扰后,达到超过99%的应变测量精度.
结论:
- 开发的FBG应变传感器有效地弥补温度变化.
- 这种传感器可以实时进行热补偿,用于诸如翼负载监控等应用.
- 通过在动态环境中精确的应变测量,可以实现更高的结构安全性.
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