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.",
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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 -