TY - GEN
T1 - Static characterization of a soft elastomeric capacitor for non destructive evaluation applications
AU - Saleem, Hussam
AU - Laflamme, Simon
AU - Zhang, Huanhuan
AU - Geiger, Randall
AU - Kessler, Michael
AU - Rajan, Krishna
PY - 2014
Y1 - 2014
N2 - A large and flexible strain transducer consisting of a soft elastomeric capacitor (SEC) has been proposed by the authors. Arranged in a network setup, the sensing strategy offers tremendous potential at conducting non-destructive evaluation of large-scale surfaces. In prior work, the authors have demonstrated the performance of the sensor at tracking strain history, localizing cracks, and detecting vibration signatures. In this paper, we characterize the static performance of the proposed SEC. The characterization includes sensitivity of the signal, and temperature and humidity dependences. Tests are conducted on a simply supported aluminum beam subjected to bending as well as on a free standing sensor. The performance of the SEC is compared against off-the-shelf resistance-based strain gauges with resolution of 1 με. A sensitivity of 1190 pF/ε is obtained experimentally, in agreement with theory. Results also show the sensor linearity over the given level of strain, showing the promise of the SEC at monitoring of surface strain.
AB - A large and flexible strain transducer consisting of a soft elastomeric capacitor (SEC) has been proposed by the authors. Arranged in a network setup, the sensing strategy offers tremendous potential at conducting non-destructive evaluation of large-scale surfaces. In prior work, the authors have demonstrated the performance of the sensor at tracking strain history, localizing cracks, and detecting vibration signatures. In this paper, we characterize the static performance of the proposed SEC. The characterization includes sensitivity of the signal, and temperature and humidity dependences. Tests are conducted on a simply supported aluminum beam subjected to bending as well as on a free standing sensor. The performance of the SEC is compared against off-the-shelf resistance-based strain gauges with resolution of 1 με. A sensitivity of 1190 pF/ε is obtained experimentally, in agreement with theory. Results also show the sensor linearity over the given level of strain, showing the promise of the SEC at monitoring of surface strain.
KW - Capacitive-Based Sensor
KW - Soft Capacitor
KW - Strain Gauge
KW - Structural Health Monitoring
UR - https://www.scopus.com/pages/publications/84903189428
U2 - 10.1063/1.4865032
DO - 10.1063/1.4865032
M3 - Conference contribution
AN - SCOPUS:84903189428
SN - 9780735412118
T3 - AIP Conference Proceedings
SP - 1729
EP - 1736
BT - 40th Annual Review of Progress in Quantitative Nondestructive Evaluation - Incorporating the 10th International Conference on Barkhausen Noise and Micromagnetic Testing
PB - American Institute of Physics Inc.
T2 - 40th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2013, Incorporating the 10th International Conference on Barkhausen and Micro-Magnetics, ICBM 2013
Y2 - 21 July 2013 through 26 July 2013
ER -