Interior tire power generation apparatus and tire monitoring system using the same

A tire monitoring system, comprising:

• 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):
• (Bix, A1-x)(By, C1-y)O3 (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, ×−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;
• at least one sensor for detecting a predetermined property of the tire;
• and
• a wireless frequency unit for transmitting information obtained from the property detected by the sensor to a remote location so as to be monitored at the remote location,
• wherein the wireless frequency unit and/or the sensor is connected to the energy storage unit to receive power from the storage unit.