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首页> 外文会议>Conference on Sensors and Their Applications; 20030902-20030904; Limerick; IE >Simultaneous and Co-located Measurement of Strain and Temperature in Optical Fibre Using a Bragg Grating and Strain-independent Erbium Fluorescence
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Simultaneous and Co-located Measurement of Strain and Temperature in Optical Fibre Using a Bragg Grating and Strain-independent Erbium Fluorescence

机译：使用布拉格光栅和不依赖应变的b荧光同时并置地测量光纤中的应变和温度

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摘要

An optical fibre sensor for the simultaneous measurement of strain and temperature is presented. This is achieved using two sensing techniques within a single sensing element, namely a fibre Bragg grating located within a length of erbium-doped fibre, thereby achieving temperature and strain measurement at the same location. Green fluorescence, arising from the de-excitation of erbium ions, is used to provide the temperature through the fluorescence intensity ratio method of temperature sensing. This method has the advantage of a cross-sensitivity with strain that is essentially nil. Thus shifts in the Bragg grating output due to temperature changes are readily determined so that the applied strain can be calculated. The particular sensor arrangement described offers the added attraction of requiring only one excitation source to stimulate green fluorescence and illuminate the grating. The sensor was characterised by placing it in a tube oven and attaching weights to the end of the fibre with a pulley arrangement. Calibration of the sensor over various strain and temperature ranges resulted in temperature and strain accuracies better than 1 ℃ and around 15 με, respectively.
机译：提出了一种用于同时测量应变和温度的光纤传感器。这是通过在单个传感元件内使用两种传感技术实现的，即位于掺a光纤长度内的光纤布拉格光栅，从而在同一位置实现温度和应变测量。通过离子去激发而产生的绿色荧光通过温度感应的荧光强度比方法提供温度。该方法的优点是交叉敏感度基本上为零。因此，很容易确定由于温度变化引起的布拉格光栅输出的偏移，从而可以计算出所施加的应变。所描述的特定传感器布置提供了仅需一个激发源来激发绿色荧光并照射光栅的额外吸引力。该传感器的特点是将其放在管式烘箱中，并通过滑轮装置将砝码连接到光纤的末端。传感器在各种应变和温度范围内的校准导致温度和应变精度分别优于1℃和15με左右。

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