Pressure Mapping Using a Double Layer Dielectric System

Results of investigation of a double layer dielectric system applied for pressure distribution determination is discussed in the paper. The system consists of elastic and rigid solid dielectric layers. The trybo-charge is generated on the contact between the rough surface of the elastic and dielectric layers when the system is subjected to an external stress. It was shown that the local effective surface charge density on the rigid dielectric layer depends on the local pressure value. The generated charge produces a proportional voltage across the solid dielectric layer after removing the elastic one (foam). This way, the pressure may be converted into a voltage signal, which is 'memorised" by a solid dielectric layer. Finally, the "pressure map" converted into 'an electric potential map" can be visualised by potential distribution determination. The potential distributions obtained in the system for different cases of non-uniform pressure distributions and different elastic layers are presented in the paper.