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DOE OSTI · 1335670

Remote temperature distribution sensing using permanent magnets

Chen, Yi·Guba, Oksana·Brooks, Carlton F.·Roberts, Christine C.·Van Bloemen Waanders, Bart G.·Nemer, Martin B.
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Abstract

Remote temperature sensing is essential for applications in enclosed vessels where feedthroughs or optical access points are not possible. A unique sensing method for measuring the temperature of multiple closely-spaced points is proposed using permanent magnets and several three-axis magnetic field sensors. The magnetic field theory for multiple magnets is discussed and a solution technique is presented. Experimental calibration procedures, solution inversion considerations and methods for optimizing the magnet orientations are described in order to obtain low-noise temperature estimates. The experimental setup and the properties of permanent magnets are shown. Finally, experiments were conducted to determine the temperature of nine magnets in different configurations over a temperature range of 5 to 60 degrees Celsius and for a sensor-to-magnet distance of up to 35 mm. Furthermore, to show the possible applications of this sensing system for measuring temperatures through metal walls, additional experiments were conducted inside an opaque 304 stainless steel cylinder.

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47 OTHER INSTRUMENTATION72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDSdesign optimizationdistributed multiple dipolesmagnetic field measurementmagnetic momentsmagnetic sensorspermanent magnetsperpendicular magnetic anisotropytemperature measurementtemperature sensors

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Chen, Yi, Guba, Oksana, Brooks, Carlton F., Roberts, Christine C., Van Bloemen Waanders, Bart G., Nemer, Martin B.. 2016-10-31. Remote temperature distribution sensing using permanent magnets. https://doi.org/10.1109/tmag.2016.2620964

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