JST  Vol.3 No.3 , September 2013
A Wireless Inductive-Capacitive Resonant Circuit Sensor Array for Force Monitoring
ABSTRACT
A wireless passive sensor array based on inductive-capacitive (LC) resonant circuits capable of simultaneously tracking two points of force loading is described. The sensor consisted of a planar spiral inductor connected to two capacitors forming a resonant circuit with two resonant frequencies. When a load was applied to one or both of the parallel plate capacitors, the distance between the plates of the capacitor was altered, thus shifting the observed resonant peaks. Testing illustrated that applied loading to a particular capacitor caused a significant shift in one of the resonant peaks and also a smaller shift in another resonant peak. This interdependence resulted from each capacitive element being connected to the same inductive spiral and was accounted for with a developed analysis algorithm. To validate the experimental observation, a circuit simulation was also generated to model the sensor behavior with changing force/displacement. The novelty of this system lies not only in its wireless passive nature, but also in the fact that a single LC sensor was fashioned to detect more than one point simultaneously.

Cite this paper
A. DeRouin, B. Pereles, T. Sansom, P. Zang and K. Ong, "A Wireless Inductive-Capacitive Resonant Circuit Sensor Array for Force Monitoring," Journal of Sensor Technology, Vol. 3 No. 3, 2013, pp. 63-69. doi: 10.4236/jst.2013.33011.
References
[1]   R. A. Potyrailo, T. Wortley, C. Surman, D. Monk, W. G. Morris, M. Vincent, R. Diana, V. Pizzi, J. Carter, G. Gach, S. Klensmeden and H. Ehring, “Passive Multivariable Temperature and Conductivity RFID Sensors for Single-Use Biopharmaceutical Manufacturing Components,” Biotechnology Progress, Vol. 27, No. 3, 2011, pp. 875-884. doi:10.1002/btpr.586

[2]   C. A. Grimes. P. Stoyanov, Y. Liu, C. Tong, K. G. Ong, K. Loiselle, M. Shaw, S. A. Doherty and W. R. Seitz, “A Magnetostatic-Coupling Based Remote Query Sensor for Environmental Monitoring,” Journal of Physics D, Vol. 32, No. 12, 1999, pp. 1329-1335. doi:10.1088/0022-3727/32/12/308

[3]   E. L. Tan, W. N. Ng, R. Shao, B. Pereles and K. G. Ong, “A Wireless, Passive Sensor for Quantifying Packaged Food Quality,” Sensors, Vol. 7, No. 9, 2007, pp. 1747-1756. doi:10.3390/s7091747

[4]   L. Ruiz-Garcia, L. Lunadei, P. Barreiro and I. Robla, “A Review of Wireless Sensor Technologies and Applications in Agriculture and Food Industry: State of the Art and Current Trends,” Sensors, Vol. 9, No. 6, 2009, pp. 4728-4750. doi:10.3390/s90604728

[5]   G. Stojanovic, M. Radovanovic, M. Malesev and V. Radonjanin, “Monitoring of Water Content in Building Materials Using a Wireless Passive Sensor,” Sensors, Vol. 10, No. 5, 2010, pp. 4270-4280. doi:10.3390/s100504270

[6]   C. A. Grimes, D. Kouzoudis, K. G. Ong and R. Crump, “Thin-Film Magnetoelastic Micro Sensors for Remote Query Biomedical Monitoring,” Biomedical Microdevices, Vol. 2, No. 1, 2000, pp. 51-60. doi:10.1023/A:1009907316867

[7]   L. Reindl, G. Scholl, T. Ostertag, C. C. W. Ruppel, W.-E. Bulst and F. Seifert, “SAW Devices as Wireless Passive Sensors,” Proceedings of Ultrasonics Symposium, San Antonio, 3-6 November 1996, pp. 363-367.

[8]   C. A. Grimes, C. S. Mungle, K. Zeng, M. K. Jain, W. R. Dreschel, M. Paulose and K. G. Ong, “Wireless Magnetoelastic Resonance Sensors: A Critical Review,” Sensors, Vol. 2, No. 7, 2002, pp. 294-313. doi:10.3390/s20700294

[9]   J. C. Butler, A. J. Vigliotti, F. W. Verdi and S. M. Walsh, “Wireless, Passive Resonant Circuit, Inductively Coupled, Inductive Strain Sensor,” Sensors and Actuators A, Vol. 102, No. 1-2, 2002, pp. 61-66. doi:10.1016/S0924-4247(02)00342-4

[10]   K. G. Ong, C. A. Grimes, C. L. Robbins and R. S. Singh, “Design and Application of a Wireless, Passive, Resonant Circuit Environmental Monitoring Sensor,” Sensors and Actuators A, Vol. 93, No. 1, 2001, pp. 33-43. doi:10.1016/S0924-4247(01)00624-0

[11]   D. Corson and P Lorrain, “Introduction to Electromagnetic Fields and Waves,” W. H. Freeman and Company, New York, 1962, pp. 58-64.

 
 
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