Environmental monitoring using magnetoelastic sensors

Craig A. Grimes; Qingyun Cai; Keat Ghee Ong; Keith Loiselle

doi:10.1117/12.390572

30 June 2000 Environmental monitoring using magnetoelastic sensors

Craig A. Grimes, Qingyun Cai, Keat Ghee Ong, Keith Loiselle

Proceedings Volume 4097, Complex Mediums; (2000) https://doi.org/10.1117/12.390572
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

Magnetoelastic thin film sensors can be considered the magnetic analog of surface acoustic wave sensors, with the characteristic resonant frequency of the magnetoeleastic sensor changing in response to different environmental parameters. We report on the application of the magnetoeleastic sensors for remote query measurement of pressure, temperature, liquid viscosity and, in combination with a glucose- responding mass-changing polymer, glucose concentrations. The advantage of using magnetoelastic sensors is that no physical connections, such as wires or cables are required to obtain sensor information allowing the sensor to be monitored from inside sealed containers. Furthermore since it is the frequency response of the sensor that is monitored, rather than the amplitude, the relative orientation of the sensor with respect to the query field is unimportant.

Citation Download Citation

Craig A. Grimes, Qingyun Cai, Keat Ghee Ong, and Keith Loiselle "Environmental monitoring using magnetoelastic sensors", Proc. SPIE 4097, Complex Mediums, (30 June 2000); https://doi.org/10.1117/12.390572

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