Core temperature measurement using inductively coupled noise thermometry at 522MHz

Colm McCaffrey, Heikki Seppä, Pekka Pursula

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    Every material which dissipates electrical energy generates thermal noise power that is related to the temperature of that material. This work exploits this effect to measure the average absolute temperature within a vessel. We present a technique for the measurement of core temperature based on inductive noise telemetry; where a loop antenna is magnetically coupled to a saline solution. Dissipations in the antenna are dominated by the solution and therefore the noise measured in the antenna is dominated by the noise in the solution. This work demonstrates a noise measurement of 0.67 pV/°C/VHz, approaching the theoretical calculated noise in the solution. The noise thermometry system is demonstrated, in ideal conditions and a temperature measurement resolution of 0.2°C is achieved.
    Original languageEnglish
    Title of host publicationSENSORS, 2016 IEEE
    PublisherIEEE Institute of Electrical and Electronic Engineers
    ISBN (Electronic)978-1-4799-8287-5
    ISBN (Print)978-1-4799-8288-2
    Publication statusPublished - 9 Jan 2016
    MoE publication typeNot Eligible
    EventIEEE SENSORS 2016 - Caribe Royale All-Suite Hotel and Convention Center, Orlando, United States
    Duration: 30 Oct 20162 Nov 2016


    ConferenceIEEE SENSORS 2016
    Country/TerritoryUnited States


    • Nyguist fluctuation-dissipation theorem
    • noise thermometry
    • thermal noise
    • inductively coupled
    • core temperature
    • UHF
    • OtaNano


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