Planar electromagnetic sensors : characterization and experimental results : a project report submitted in partial fulfilment of the requirements for the degree of Master of Engineering in Information and Telecommunications Engineering

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Massey University
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Planar type electromagnetic sensors have simple structures and are very useful for the inspection of material properties, in a non-destructive and non-invasive way. The operating principle of the sensing technique is based on the interaction of electromagnetic fields with the materials under test. Three types of planar sensors: meander, mesh and interdigital configuration have been analyzed to determine their characteristics. Finite element software has been used for the analysis of flux distribution for all three types of sensors. The nature of the impedance characteristics has also been obtained through experiments. It has been reported that meander and mesh type sensors respond well at moderately high frequencies. To avoid relatively costly instrumentation systems at high frequencies, interdigital sensors having good response at low frequencies have been considered. The response of all the sensors, especially the interdigital types to milk of varying fat content, quality estimation of saxophone reeds and non-invasive estimation of fat content of pork belly cuts have been determined. The different types of sensors can be made as a sensor array, to estimate the properties of mixtures of electric, magnetic and dielectric materials. A microcontroller based low cost sensing system is under development.
Content removed due to Copyright: C.Gooneratne and S.C.Mukhopadhyay, "Application of a Novel Planar Sensor to Estimate the Life of Turbine", Proceeding of AUPEC 2004 conference, paper no., 16, Sep. 26-Sep. 29, 2003, Brisbane, Australia, ISBN 1-884-99775-3. C Gooneratne, S.C. Mukhopadhyay, and G. Sen Gupta, "A Review of Sensing Technologies for Landmine Detection: Unmanned Vehicle Based Approach", Proceedings of Second International Conference on Autonomous Robots and Agents, December 13-15, 2004, Palmerston North, New Zealand, pp. 401-407. C. Gooneratne, S.C. Mukhopadhyay and Y, Yamada, "Novel Planar Electromagnetic Sensore - Characterization and Comparative Evaluation", IEEE Intermag Conference, April 4-8, 2005, Nagoya, Japan, paper number EF-07, Conference digests, page number 483. C.P.Gooneratne, S.C. Mukhopadhyay, G. Sen Gupta and K. Thakur, "Characterization and Comparative Evaluation of Novel Planar Electromagnetic Sensors", Proceedings of ISEMA 2005, 6th International Conference on Electromagnetic Wave Interaction with Water and Moist Substances, Weimer, Germany, May 29-June 1, 2005, page number 243-250. S.C. Mukhopadhyay, C.P.Gooneratne, S. Demidenko and G. Sen Gupta, "Low Cost Sensing System for Dairy Products Quality Monitoring", Proceedings of 2005 International Instrumentation and Measurement Technology Conference, May 17-19, 2005, Ottawa, Canada, IEEE Catalog Number 05CH37627C, ISBN 0-7803-8880-1, Page number 244-249. J. Akramy, C. Gooneratne, S>C> Mukhopadhyay and G. Sen Gupta, "A Controlled Frequency Signal Source for Electromagnetic Sensing Applications", Proceedings of 11th Electronics New Zealand Conference (ENZ Con), November 15-16, 2004, Palmerston North, New Zealand, pp. 124-29. S.C. Mukhopadhyay, C>P> Gooneratne, G. Sengupta and S. Yamada, "Characterization and Comparative Evaluation of Novel Planar Electromagnetic Sensors" IEEE Transactions on Magnetics, October 2005, Vol. 41, No. 10, pp. 3658-3660. C Gooneratne, S>C> Mukhopadhyay, R. Purchas and G. Sen Gupta, "Interaction of Planar Electromagnetic Sensors with Samples From Pork Belly Cuts", Paper accepted for the International Conference on Sensing Technology, November 21-23, 2005, Palmerston North, New Zealand. Please consult print copy held in Library.
Magnetic testing, Detectors