A Temperature-independent Lateral Force Sensor using a Pair of FBGs
A Temperature-independent Lateral Force Sensor using a Pair of FBGs
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DOI：
10.1109/apmc.2007.4554686
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发表时间：
2007-12
期刊：
影响因子：
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通讯作者：
J. Hao;L. Ong;Y. Gong;Z. Cai;J. Ng;P. Varghese
中科院分区：
文献类型：
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作者：
J. Hao;L. Ong;Y. Gong;Z. Cai;J. Ng;P. Varghese
提出了一种新型的弧形光纤布拉格光栅(FBG)侧向力传感器，将一对FBG对称地埋入弹性弯曲梁中。制作了峰值波长间隔约为0.4 nm的FBG对。波长较短的FBG位于中性层上方，波长较长的FBG位于中性层下方。结果是，当施加侧向力时，FBG对的两个峰值波长分开，但当周围温度变化时，两个峰值波长一起向同一方向移动，两者都以线性方式移动。对这种结构的组件进行了理论和实验研究，结果表明，经过适当的标定，这种弧形FBG传感器可以同时测量温度和侧向力。在35℃到82℃的温度范围内，它的温度依赖性很低，只有0.04 pm/℃，这使得它适合于即使在环境温度变化的情况下也能进行动态侧向力的测量。
A novel arc-shaped FBG (fiber Bragg grating) lateral force sensor is developed with a pair of FBGs embedded symmetrically in an elastic bending beam. The FBG pair is produced with peak wavelength separation of about 0.4 nm. The FBG with shorter wavelength is located above the neutral layer and another with longer wavelength below the neutral layer. As a result, the two peak wavelengths of the FBG pair move apart with lateral force applied but move together in the same direction when surrounding temperature varies, both in a linear manner. A module with such structure has been studied both theoretically and experimentally, which proved that proper calibration makes such arc-shaped FBG sensor capable of simultaneous measurement of both temperature and lateral force. A very low temperature-dependency of only 0.04 pm/degC across the temperature range from 35degC to 82degC has been achieved, which makes it suitable for dynamic lateral force measurement even when the environmental temperature varies.