Hydrogen leak detection using an optical fibre sensor for aerospace applications
Hydrogen leak detection using an optical fibre sensor for aerospace applications
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DOI：
10.1016/s0925-4005(00)00407-x
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发表时间：
2000-08-10
影响因子：
8.4
通讯作者：
Clément, M
中科院分区：
文献类型：
--
作者：
Bévenot, X;Trouillet, A;Clément, M
研制了一种用于探测欧洲阿丽亚娜5号火箭低温发动机氢泄漏的光纤传感器。该传感器的原理是基于沉积在多模光纤输出端面的钯膜反射率的变化。使用受监控的高功率激光二极管的实验装置提供了钯层的光学加热，这允许在-196摄氏度和+23摄氏度之间的宽温度范围内保持性能。根据浓度和温度，检测响应在1%和17%之间，响应时间短于5秒。对低于爆炸极限的氢气浓度进行了快速准确的检测。(C)2000 Elsevier Science S.A. All rights reserved.
An optical fibre sensor has been developed for the detection of hydrogen leakages on the cryotechnic engine of the European rocket ARIANE V. The principle of this sensor is based on the variation of reflectivity of a palladium micromirror deposited at the output end face of a multimode optical fibre. An experimental set-up using a monitored high power laser diode provides an optical heating of the palladium layer, which allows to keep up the performances in the wide range of temperatures between - 196 degrees C and + 23 degrees C. Depending on both the concentration and the temperature, detection responses between 1% and 17% with response times shorter than 5 s have been demonstrated. Fast and accurate detection of hydrogen concentrations inferior to the explosive limit has been performed. (C) 2000 Elsevier Science S.A. All rights reserved.