Sewerage tunnel leakage detection using a fibre optic moisture-detecting sensor system
Sewerage tunnel leakage detection using a fibre optic moisture-detecting sensor system
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DOI：
10.1016/j.sna.2014.09.018
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发表时间：
2014-12-01
影响因子：
4.6
通讯作者：
Roth, B.
中科院分区：
文献类型：
--
作者：
Bremer, K.;Meinhardt-Wollweber, M.;Roth, B.
设计和开发了一种新的光纤传感器系统，用于污水隧道泄漏的光学检测。所开发的系统克服了通常采用的基于相机的检查系统的缺点，所述检查系统相对复杂，并且另外需要预先清洁待监测的结构。该传感器概念结合了基于光纤布拉格光栅（FBG）的湿度传感器和可膨胀聚合物光纤传感器。这两个传感器都位于污水隧道的沿着，以便它们可以立即对可能发生的任何泄漏作出反应。可溶胀聚合物光纤传感器在水的存在下显示出34.2dB的响应，该性能上级迄今报道的其它可溶胀聚合物光纤传感器所见的性能。此外，两种传感器对高碱性环境（pH 13.4）的耐受性，这是这种传感器的重要特征，得到了验证。因此，与使用传统的检测技术相比，新型光纤传感器系统提供了一种非常适合在污水隧道中使用的鲁棒的、相对低成本的和连续的监测系统。(C)2014爱思唯尔有限公司版权所有。
The design and development of a new fibre optic sensor system for the optical detection of leakages in sewerage tunnels is reported. The system developed overcomes the disadvantages of the usually employed camera based inspection systems which are relatively complex and, in addition, require cleaning of the structures to be monitored beforehand. The sensor concept created combines a Fibre Bragg Grating (FBG)-based humidity sensor and a swellable polymeric fibre optic sensor. Both sensors are located along the sewerage tunnel so that they can response immediately to any leakages that may occur. The swellable polymeric fibre optic sensor shows a response of 34.2 dB in the presence of water, a performance which is superior to that seen form other swellable polymeric fibre optic sensors reported so far. Furthermore, the resistance of both sensors to highly alkaline environments (pH 13.4), an important feature of such sensors was verified. Consequently, when compared to the use of conventional inspection techniques, the novel fibre optic sensor system provides a robust, relatively low-cost and continuous monitoring system well suited to use in sewerage tunnels. (C) 2014 Elsevier B.V. All rights reserved.