US Patent Number
An analyte, viscosity, or temperature sensing apparatus for operative arrangement within a time-varying magnetic field, including a sensor with an outer surface that is chemically, frictionally, or thermally responsive and adhered to a base magnetostrictive element, and a receiver to measure a first and second value for magneto-elastic emission intensity of the sensor taken at, respectively, a first and second interrogation frequency. A change in mass or a change in material stiffness of the sensor due to the responsiveness, the viscosity and mass density of a fluid therearound, or the temperature, can be identified. The receiver, alternatively, measures a plurality of successive values for magneto-elastic emission intensity of the sensor taken over an operating range of successive interrogation frequencies to identify a value for the sensor's magneto-elastic resonant frequency (a fundamental frequency or harmonic thereof). Several sensors in an ordered array will provide a “package” of information.
University of Kentucky Research Foundation, Lexington, KY (US)
Grimes, Craig A. and Stoyanov, Plamen G., "Remote Magneto-Elastic Analyte, Viscosity and Temperature Sensing Apparatus and Associated Methods of Sensing" (2002). Chemical and Materials Engineering Faculty Patents. 12.