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首页> 外文OA文献 >High-sensitivity fiber Bragg grating temperature sensor at high temperature 一种高温下高灵敏光纤光栅温度传感器的制作方法ud
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High-sensitivity fiber Bragg grating temperature sensor at high temperature 一种高温下高灵敏光纤光栅温度传感器的制作方法ud

机译：High-sensitivity fiber Bragg grating temperature sensor at high temperature 一种高温下高灵敏光纤光栅温度传感器的制作方法ud

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摘要

A method of making full use of the durable strain which fiber Bragg grating (FBG) can undertake is presented, which hugely improves the sensitivities of FBG temperature sensors at high temperature. When a sensor is manufactured at room temperature, its FBG should be given a pre-relaxing length according to the temperature it is asked to measure; once the temperature rise to the asked one, its FBG starts to be stretched and it starts to work with high sensitivity. The relationship between the pre-relaxing length and the working temperature is analyzed. In experiments, when the pre-relaxing lengths are 0.2mm、0.5mm、0.6mm, the working temperatures rise 25℃、50℃、61℃, respectively, and the sensitivities are almost the same (675pm/℃). The facts that the experimental results agree well with the theoretical analyses verify this method’s validity.
机译：提出了一种充分利用光纤布拉格光栅（FBG）可以承受的持久应变的方法，该方法极大地提高了FBG温度传感器在高温下的灵敏度。当传感器在室温下制造时，应根据要求测量的温度为其FBG赋予预松弛长度；一旦温度升至要求的温度，其FBG就会开始伸展，并开始以高灵敏度工作。分析了预松弛长度与工作温度之间的关系。在实验中，当预松弛长度分别为0.2mm，0.5mm，0.6mm时，工作温度分别升高25℃，50℃，61℃，灵敏度几乎相同（675pm /℃）。实验结果与理论分析吻合良好，证明了该方法的有效性。

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