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This paper presents an inexpensive high-sensitivity microphone based on polyvinylidene fluoride (PVDF) film. High sensitivity is achieved through pressure amplification created by the area ratio between the rigid surface exposed to acoustic waves and a crosshair-shaped PVDF film, in combination with the reduced capacitance created by a similarly shaped top electrode. The crosshair shape is obtained...
As one of tomographic imaging techniques, electrical capacitance tomography (ECT) has been successfully applied to many industrial applications. While ECT sensors are normally circular, some other shapes, such as square and parallel, are demanded for some specific applications. This paper introduces an ECT sensor with a two-plate structure, providing incomplete measurement data only. It is flexible...
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