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A Novel Uniplanar Multi-Electrode Capacitive Sensor for In-Situ Weathering Damage Detection of nonmetallic materials

引用

稀有金属材料与工程 2006年第A3期35卷 630-633页

作者： Ensheng Dong Yonggui Dong Wener Lv Huibo Jia Jun Li State Key Laboratory of Precision Measurement Technology and Instruments Dept. of Precision Instrum~nts and Mechanology Tsinghua University Beijing 100084 China Dept of Aviation Control and Engineering Aviation University of Air Force Changchun 130022 China

A uniplanar capacitive sensor with 5-electrodes on one plane substrate and a large reflector electrode,was designed to get the corresponding capacitance information for weathering damage detection of non-metallic materials exposed to a service environment.A 2-D finite-element method was employed to simulate the electric potential distribution and capacitance measurements for the sensor.2 marble slabs,one was healthy and the other was notched,were experimentally *** the simulation and the preliminary experimental results show that the measured capacitances decrease after weathering damage occurs in nonmetallic *** reflector can enlarge the sensitive *** weathering assessment of nonmetallic materials can be done by processing the measured *** proposed approach can effectively detect the weathering damage of nonmetallic material and can be practically used for in-situ weathering damage evaluation.

关键词： capacitive sensor weathering damage detection reflector electrode non-metallic materials

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