Improved capacitive detection method for Coriolis mass flow sensors enabling range/sensitivity tuning

Dennis Alveringh, D. Tsoukalas (Editor), Remco J. Wiegerink (Editor), Jarno Groenesteijn, U. Staufer (Editor), Joost Conrad Lötters

    Research output: Contribution to journalArticleAcademicpeer-review

    4 Citations (Scopus)
    86 Downloads (Pure)

    Abstract

    We report on a novel capacitive detection principle for Coriolis mass flow sensors which allows for three times increased sensitivity. Capacitive Coriolis mass flow sensors are normally read out by two electrodes that measure the ratio between the actuation mode and the Coriolis mode, which is induced by the mass flow. This ratio results in a phase shift between the two electrodes. By adding two additional read out electrodes, the actuation mode signal is partially canceled, allowing for higher sensitivity to the Coriolis mode, and thus larger phase shifts for the same mass flows. An analytical model is derived and corresponds with the measurements. It is also proven that the range and sensitivity of the sensor can be tuned by changing the size of the additional readout electrodes. This readout method does not increase the readout time.
    Original languageUndefined
    Pages (from-to)1-5
    Number of pages5
    JournalMicroelectronic engineering
    Volume159
    DOIs
    Publication statusPublished - 15 Jun 2016

    Keywords

    • EWI-26815
    • Coriolis flow sensor
    • Phase detection
    • Actuation mode cancelation
    • IR-99599
    • Capacitive readout
    • METIS-316038

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