Patent ID: 8525658

Claim:
An interior tire power generation apparatus to be fixed on an interior surface of a tire, comprising: (i) a piezoelectric section having an inorganic piezoelectric body of a perovskite type oxide represented by the following General Formula (PX): (Bi x , A 1-x )(B y , C 1-y )O 3 (PX) where, A is an A-site element, other than Pb, with an average ionic valence of 2, B is a B-site element with an average ionic valence of 3, C is a B-site element with an average ionic valence of greater than 3, and each of A, B, and C is one or a plurality of types of metal elements; O is oxygen; B and C are of different compositions; and 0.6<x<1.0, x-0.2<y<x; (ii) a pair of electrodes for extracting an electric charge generated in the piezoelectric section when the section is strained by an external force exerted on the tire; and (iii) an energy storage unit for storing the extracted electric charge, wherein the piezoelectric section comprises a polymer composite piezoelectric body constituted by an organic polymer resin matrix and the inorganic piezoelectric body included in the matrix.