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首页> 外文期刊>IEEE sensors journal >Temperature Compensated High-Resolution Interrogation of FBG Strain Sensor Based on Four Wave Mixing
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Temperature Compensated High-Resolution Interrogation of FBG Strain Sensor Based on Four Wave Mixing

机译：基于四波混合的FBG应变传感器温度补偿高分辨率询问

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摘要

Realization of temperature compensation and high sensitivity is a challenging task in the field of FBG based strain sensor. A unique scheme of high sensitive temperature compensated interrogation technique for FBG strain sensors is proposed. Two chirped FBGs are designed in such a way that effect of temperature on one FBG is compensated by the other FBG. The strain sensitivity is enhanced by a factor of sixteen compared to the signal reflected from the edge of the FBG using only third order Four wave mixing (FWM) product. The third order FWM product generated in the 1st stage FWM process is filtered and utilized in the 2nd stage FWM process to enhance the sensitivity. The proposed scheme attains high sensitivity of 0.312 dBm/mu epsilon with strain resolution of 0.032 mu epsilon using only 3rd order FWM product.
机译：实现温度补偿和高灵敏度是基于FBG的应变传感器领域的具有挑战性的任务。提出了一种用于FBG应变传感器的高敏感温度补偿询问技术的独特方案。两种啁啾的FBGS设计成这种方式，这种方式对一个FBG的温度的影响由其他FBG补偿。与仅使用三阶四波混合（FWM）产品的来自FBG边缘反射的信号相比，应变灵敏度增强了16倍。在第1阶段FWM工艺中产生的三阶FWM产品被过滤并在第2级FWM过程中使用，以增强灵敏度。该方案仅达到0.312dBm / muε的高灵敏度，其菌株分辨率为0.032μmε，仅使用3rd阶FWM产品。

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