Simultaneous Strain and Temperature Multipoint Sensor Based on Microstructured Optical Fiber
Simultaneous Strain and Temperature Multipoint Sensor Based on Microstructured Optical Fiber
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DOI：
10.1109/jlt.2017.2752278
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发表时间：
2018-02
影响因子：
4.7
通讯作者：
A. Lopez-Aldaba;J. Auguste;R. Jamier;P. Roy;M. López-Amo
中科院分区：
文献类型：
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作者：
A. Lopez-Aldaba;J. Auguste;R. Jamier;P. Roy;M. López-Amo
本文提出了一种新的传感器系统，用于同时和独立的多点应变和温度测量。通过监测传感头的快速傅里叶变换相位变化来进行传感头的询问。特别地，每个微结构光纤腔干涉频率中的两个用于测量。该方法与信号幅度无关，并且还避免了跟踪光谱中的波长演变的必要性，当存在具有不同灵敏度的多个干涉频率分量时，这可能是一个障碍。传感头呈现双折射和多模态特性，因此，这两种特性导致其自身具有不同特性和灵敏度的干扰。传感头的多路复用能力和重复检测方法也已经过测试和验证。传感器在30 °C-80 °C的温度范围内操作，并施加10450 μ π ι的变形。测量之间的串扰可以通过简单的数学运算进行校正，从而形成独立的无串扰多点和多参数传感器。
In this paper, a new sensor system for simultaneous and independent multipoint strain and temperature measurements is presented. The interrogation of the sensing heads has been carried out by monitoring their fast Fourier transform phase variations. In particular, two of each microstructured optical fiber cavity interference frequencies were used for the measures. This method is independent of the signal amplitude and also avoids the necessity of tracking the wavelength evolution in the spectrum, which can be a handicap when there are multiple interference frequency components with different sensitivities. The sensing heads present birefringent and multimodal properties, and therefore, both characteristics lead to their own interference with different properties and sensitivities. The multiplexing capability of the sensing heads and the interrogator method has also been tested and validated. Sensors were operated within a range of temperature 30 °C–80 °C and a deformation of ∼450 μϵ was applied. Crosstalk between measurements can be corrected through simple math operations leading to independent and crosstalk-free multipoint and multiparameter sensors.