Simultaneous measurement of strain and temperature using a tilted fiber Bragg grating
Simultaneous measurement of strain and temperature using a tilted fiber Bragg grating
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DOI：
10.1016/j.sna.2021.113346
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发表时间：
2022-01-15
影响因子：
4.6
通讯作者：
Ogasawara, Toshio
中科院分区：
文献类型：
--
作者：
Takeda, Shin-ichi;Sato, Masashi;Ogasawara, Toshio
倾斜光纤布拉格光栅(TFBG)透射谱中的布拉格模和包层模可以估算出材料的应变、温度和折射率。从这些指标的变化来评价树脂基复合材料的应变和温度。通过改变温度或机械应变，同时固定其他参数，获得了TFBG的灵敏度。然后将TFBG表面安装在更实际的环境中，在该环境中温度和应变都会发生变化。测试结果表明，同时测量是可能的，但传统的包层模式下提取任意峰的方法测量精度较低。为了改善这一情况，非任意提取了两个峰以最小化条件数。建议的提取方法明显提高了TFBG应变和温度测量的准确性。(C)2022 Elsevier B.V.保留所有权利。
The strain, temperature and refractive index of a material can be evaluated from the Bragg and cladding modes in the transmission spectrum of tilted fiber Bragg gratings (TFBGs). The strain and temperature of resin-based composite materials are evaluated from the changes of these indicators. The sensitivities of the TFBG were acquired by changing either the temperature or mechanical strain while fixing the other parameter. The TFBG was then surface-mounted in a more practical environment in which both the tem-perature and strain changed. The test results showed that simultaneous measurement was possible, but the conventional method of extracting arbitrary peaks in cladding mode had low measurement accuracy. To improve this situation, two peaks were non-arbitrarily extracted to minimize the condition number. The proposed extraction method clearly improved the accuracy of strain and temperature measurements by the TFBG.(c) 2022 Elsevier B.V. All rights reserved.