Pressure detection sensor

A pressure detection apparatus comprising:

• a pressure detection sensor;
• a signal processor connected to the pressure detection sensor and configured to process an electric signal generated by the pressure detection sensor;
• and
• a controller connected to the signal processor and configured to generate a control signal on the basis of the signal processed by the signal processor,
• wherein the pressure detection sensor includes:
• a first electrode layer including a channel portion configured to output a sensing signal and a wiring portion connected to the channel portion;
• a first elastic dielectric layer disposed on the first electrode layer;
• a second electrode layer disposed on the first elastic dielectric layer at a position corresponding to the channel portion;
• a second elastic dielectric layer disposed on the second electrode layer;
• and
• a third electrode layer disposed on the second elastic dielectric layer,
• wherein, when a pressure is applied to the third electrode layer, capacitances of the first elastic dielectric layer and the second elastic dielectric layer are changed.