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. 2017 Sep 20;17(9):2158. doi: 10.3390/s17092158

Figure 3.

Figure 3

Model of the area-changed capacitive transducer. (a) Single area-changed capacitive displacement transducer; (b) Encoder-like area-changed capacitive transducer using the ideal plane-parallel capacitor model; (c) Encoder-like area-changed capacitive transducer model considering the fringe effect; (d) Model of Heerens’s formula for calculation fringe effect.