In Situ Detection of Water Leakage for Textile-Reinforced Composites

Sensors

Julie Regnier¹  Aurélie Cayla¹  Eric Devaux¹  Christine Campagne¹ 

[1] ENSAIT (Ecole Nationale Supérieure des Arts et Industries Textiles), Institute Centrale Lille, GEMTEX, Laboratoire de Génie et Matériaux Textiles, 2 Allée Louise et Victor Champier, 59056 Roubaix CEDEX 1, F-59000 Lille, France;

关键词: water leak detection;    composite resin;    metallic and carbon-based conductive yarns;   

DOI  :  10.3390/s20226641

来源: DOAJ

【 摘 要 】

By incorporating electrically conductive yarns into a waterproof membrane, one can detect epoxy resin cracking or liquid leakage. Therefore, this study examined the electrical conductivity variations of several yarns (metallic or carbon-based) for cracking and water detection. The first observations concerned the detectors’ feasibility by investigating their conductivity variations during both their resin implementation processes and their resin cracking. Throughout this experiment, two phenomena were detected: the compression and the separation of the fibres by the resin. In addition, the resin cracking had an important role in decreasing the yarns’ conductivity. The second part of this study concerned water detection. Two principles were established and implemented, first with yarns and then with yarns incorporated into the resin. First, the principle of absorption was based on the conductivity variation with the yarns’ swelling after contact with water. A short circuit was established by the creation of a conductive path when a drop of water was deposited between two conductive, parallel yarns. Through the influence of the yarns’ properties, this study explored the metallic yarns’ capacity to better detect water with a short circuit and the ability of the carbon-based yarns to detect water by the principle of absorption.

【 授权许可】

Unknown