Capacitive transducers

Consider a capacitor consisting of two parallel conducting plates with an insulator in between.

Its capictance is C = ε₀ε_r A/d

where ε_o is the dielectric constant of the vacuum, ε_r is the dielectric constant of the insulator, A is the area of the plates, and d is the distance between them.

Any one of these three variables can be changed by the displacement. However only variations of ε_r and the area overlap will produce a linear response.

 

Posted Date: 8/28/2012 6:52:47 AM | Location : United States

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