期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 76, 期 -, 页码 187-193出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2014.11.067
关键词
Piezoelectric; Impedance; Concrete; Structural health monitoring
资金
- National Natural Science Foundation of China [51202089, 51202090]
- Shandong Province Higher Educational Science and Technology Program [J12LA05]
- State Key Laboratory of High Performance Civil Engineering Materials [2012CEM009]
- Program for Scientific Research Innovation Team in Colleges and Universities of Shandong Province
A kind of embedded impedance-based piezoelectric sensor was fabricated by using mixture of cement powder and epoxy resin as packaging layer. Effects of temperature and load on impedance and conductance spectra of the sensor were investigated. The results show that the baseline of conductance spectra shifts with increasing temperature, and the resonance peaks in the conductance spectra show obvious temperature dependence. The impedance spectra of the embedded sensor under external load from different direction was discussed. The results indicate that the sensor is sensitive to the initial load when the external load is parallel to the thickness direction of the sensor. When the load is along the planar direction of the sensor, the impedance spectra of the sensor show good correlation with the load variation. The root mean square deviation (RMSD) index was also employed here to intuitively indicate the impedance variation of the embedded PZT sensor under temperature and load. (C) 2014 Elsevier Ltd. All rights reserved.
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