Parallel double-plate capacitive proximity sensor modelling based on effective theory

A semi-analytical model for a double-plate capacitive proximity sensor is presented according to the effective theory. Three physical models are established to derive the final equation of the sensor. Measured data are used to determine the coefficients. The final equation is verified by using measured data. The average relative error of the calculated and the measured sensor capacitance is less than 7.5%. The equation can be used to provide guidance to engineering design of the proximity sensors.

[1]  Alexander Mamishev,et al.  Evaluation of diffusion-driven material property profiles using three-wavelength interdigital sensor , 2001 .

[2]  Frédéric Taillade,et al.  Electromagnetic characterization of grouting materials of bridge post tensioned ducts for NDT using capacitive probe , 2013 .

[3]  Sigurd Wagner,et al.  Capacitive sensing of droplets for microfluidic devices based on thermocapillary actuation. , 2004, Lab on a chip.

[4]  A.V. Mamishev,et al.  Nondimensionalized Parametric Modeling of Fringing Electric-Field Sensors , 2006, IEEE Sensors Journal.

[5]  B. E. Noltingk,et al.  A novel proximity gauge , 1969 .

[6]  L. Byrd,et al.  Moisture content estimation in paper pulp using fringing field impedance spectroscopy , 2004, IEEE Sensors Journal.

[7]  H. Engan.  Surface Acoustic Wave Multielectrode Transducers , 1975, IEEE Transactions on Sonics and Ultrasonics.

[8]  Huanyu Cheng,et al.  Analysis of a concentric coplanar capacitor for epidermal hydration sensing , 2013 .

[9]  Alexander Mamishev,et al.  Optimization of multi-wavelength interdigital dielectrometry instrumentation and algorithms , 1998 .

[10]  Nicola Bowler,et al.  Analysis of Arc-Electrode Capacitive Sensors for Characterization of Dielectric Cylindrical Rods , 2012, IEEE Transactions on Instrumentation and Measurement.

[11]  M. Peskin,et al.  An Introduction To Quantum Field Theory , 1995 .

[12]  Wael W. El-Dakhakhni,et al.  Coplanar capacitance sensors for detecting water intrusion in composite structures , 2008 .

[13]  Jiang Tao,et al.  Design of automatic feeding system in standardization pond culture. , 2010 .

[14]  S. Datta,et al.  Element Factor for Periodic Transducers , 1980, IEEE Transactions on Sonics and Ultrasonics.

[15]  W. El-Dakhakhni,et al.  Damage Detection of FRP-Strengthened Concrete Structures Using Capacitance Measurements , 2009 .