Abstract A strain gauge sensor based on Fiber Bragg Grating (FBG) for diameter measurement is proposed and experimentally demonstrated. The sensor is easily fabricated inserting the FBG on the strain gauge—it was fabricated using a 3D printer—and fixing the FBG in two points of this structure. The idea is to vary the diameter of the structure. We developed two experimental setups, the first one is used to evaluate the response of the FBG to strain and the second one to assess the possibility of using the structure developed to monitor the desired parameter. The results demonstrated that the structure can be used as a way to monitor the diameter variation in some applications. The sensor presented a sensitivity of 0.5361 nm/mm and a good linear response of 0.9976 using the Strain Gauge with FBG and fused taper.

中文翻译：

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基于光纤布拉格光栅的应变计测径传感器的实验研究

摘要 提出了一种用于直径测量的基于光纤布拉格光栅（FBG）的应变计传感器并进行了实验验证。通过将 FBG 插入应变计（它是使用 3D 打印机制造的）并将 FBG 固定在该结构的两个点上，可以轻松制造传感器。这个想法是改变结构的直径。我们开发了两个实验装置，第一个用于评估 FBG 对应变的响应，第二个用于评估使用开发的结构来监测所需参数的可能性。结果表明，该结构可用作在某些应用中监测直径变化的一种方式。该传感器使用具有 FBG 和熔融锥度的应变计呈现 0.5361 nm/mm 的灵敏度和 0.9976 的良好线性响应。