Load to capacitance transfer using different spring elements in capacitive transducers

Wouter Olthuis, B.J. Kooi, Johan G. Bomer, Piet Bergveld

    Research output: Contribution to journalArticleAcademicpeer-review

    3 Citations (Scopus)

    Abstract

    Many physical sensors in which a displacement is the result of a change in the variable to be measured rely on the principle of capacitive transduction to transfer this displacement into a suitable electric signal. Commonly, the linearity of this transduction is one of the design criteria. The total transduction of physical load to capacitance change can be subdivided into the transfer from load to displacement and from displacement to capacitance change. The latter is non-linear due to its well-known hyperbolic behaviour. The first one — that of load to displacement — depends on the nature of the spring elements between the two plates of the capacitor. When, e.g., a rubber elastic spring is applied, the load to displacement transfer is also not linear. It is the aim of this paper to show that the two non-linear transfer functions of the mentioned subsystems result into a remarkably increased linearity for the transfer of the total capacitive transducer. The thus obtained theoretical relation is experimentally verified for the most favourable situation, using rubber elastic springs. The results are in good agreement with the theory.
    Original languageUndefined
    Pages (from-to)256-261
    Number of pages6
    JournalSensors and actuators. A: Physical
    Volume2000
    Issue number85
    DOIs
    Publication statusPublished - 2000

    Keywords

    • IR-74268
    • METIS-111853
    • Capacitive transducer
    • Linearity
    • Rubber elasticity

    Cite this

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    title = "Load to capacitance transfer using different spring elements in capacitive transducers",
    abstract = "Many physical sensors in which a displacement is the result of a change in the variable to be measured rely on the principle of capacitive transduction to transfer this displacement into a suitable electric signal. Commonly, the linearity of this transduction is one of the design criteria. The total transduction of physical load to capacitance change can be subdivided into the transfer from load to displacement and from displacement to capacitance change. The latter is non-linear due to its well-known hyperbolic behaviour. The first one — that of load to displacement — depends on the nature of the spring elements between the two plates of the capacitor. When, e.g., a rubber elastic spring is applied, the load to displacement transfer is also not linear. It is the aim of this paper to show that the two non-linear transfer functions of the mentioned subsystems result into a remarkably increased linearity for the transfer of the total capacitive transducer. The thus obtained theoretical relation is experimentally verified for the most favourable situation, using rubber elastic springs. The results are in good agreement with the theory.",
    keywords = "IR-74268, METIS-111853, Capacitive transducer, Linearity, Rubber elasticity",
    author = "Wouter Olthuis and B.J. Kooi and Bomer, {Johan G.} and Piet Bergveld",
    year = "2000",
    doi = "10.1016/S0924-4247(00)00409-X",
    language = "Undefined",
    volume = "2000",
    pages = "256--261",
    journal = "Sensors and actuators. A: Physical",
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    Load to capacitance transfer using different spring elements in capacitive transducers. / Olthuis, Wouter; Kooi, B.J.; Bomer, Johan G.; Bergveld, Piet.

    In: Sensors and actuators. A: Physical, Vol. 2000, No. 85, 2000, p. 256-261.

    Research output: Contribution to journalArticleAcademicpeer-review

    TY - JOUR

    T1 - Load to capacitance transfer using different spring elements in capacitive transducers

    AU - Olthuis, Wouter

    AU - Kooi, B.J.

    AU - Bomer, Johan G.

    AU - Bergveld, Piet

    PY - 2000

    Y1 - 2000

    N2 - Many physical sensors in which a displacement is the result of a change in the variable to be measured rely on the principle of capacitive transduction to transfer this displacement into a suitable electric signal. Commonly, the linearity of this transduction is one of the design criteria. The total transduction of physical load to capacitance change can be subdivided into the transfer from load to displacement and from displacement to capacitance change. The latter is non-linear due to its well-known hyperbolic behaviour. The first one — that of load to displacement — depends on the nature of the spring elements between the two plates of the capacitor. When, e.g., a rubber elastic spring is applied, the load to displacement transfer is also not linear. It is the aim of this paper to show that the two non-linear transfer functions of the mentioned subsystems result into a remarkably increased linearity for the transfer of the total capacitive transducer. The thus obtained theoretical relation is experimentally verified for the most favourable situation, using rubber elastic springs. The results are in good agreement with the theory.

    AB - Many physical sensors in which a displacement is the result of a change in the variable to be measured rely on the principle of capacitive transduction to transfer this displacement into a suitable electric signal. Commonly, the linearity of this transduction is one of the design criteria. The total transduction of physical load to capacitance change can be subdivided into the transfer from load to displacement and from displacement to capacitance change. The latter is non-linear due to its well-known hyperbolic behaviour. The first one — that of load to displacement — depends on the nature of the spring elements between the two plates of the capacitor. When, e.g., a rubber elastic spring is applied, the load to displacement transfer is also not linear. It is the aim of this paper to show that the two non-linear transfer functions of the mentioned subsystems result into a remarkably increased linearity for the transfer of the total capacitive transducer. The thus obtained theoretical relation is experimentally verified for the most favourable situation, using rubber elastic springs. The results are in good agreement with the theory.

    KW - IR-74268

    KW - METIS-111853

    KW - Capacitive transducer

    KW - Linearity

    KW - Rubber elasticity

    U2 - 10.1016/S0924-4247(00)00409-X

    DO - 10.1016/S0924-4247(00)00409-X

    M3 - Article

    VL - 2000

    SP - 256

    EP - 261

    JO - Sensors and actuators. A: Physical

    JF - Sensors and actuators. A: Physical

    SN - 0924-4247

    IS - 85

    ER -