期刊
JOURNAL OF ENGINEERING MECHANICS
卷 139, 期 7, 页码 879-885出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)EM.1943-7889.0000530
关键词
Strain gages; Structural health monitoring; Monitoring; Probe instruments; Strain gauge; Structural health monitoring; Strain monitoring; Capacitive sensor; Dielectric polymer; Stretchable sensor; Flexible membrane; Sensing skin
资金
- WING initiative of the German Ministry of Education and Research [NMP/03X5511]
Early detection of possible defects in civil infrastructure is vital to ensuring timely maintenance and extending structure life expectancy. The authors recently proposed a novel method for structural health monitoring based on soft capacitors. The sensor consisted of an off-the-shelf flexible capacitor that could be easily deployed over large surfaces, the main advantages being cost-effectiveness, easy installation, and allowing simple signal processing. In this paper, a capacitive sensor with tailored mechanical and electrical properties is presented, resulting in greatly improved robustness while retaining measurement sensitivity. The sensor is fabricated from a thermoplastic elastomer mixed with titanium dioxide and sandwiched between conductive composite electrodes. Experimental verifications conducted on wood and concrete specimens demonstrate the improved robustness, as well as the ability of the sensing method to diagnose and locate strain.
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