| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piezoelectric member reduced in cost by its simple structure and enhanced in safety, and also to provide a mobile body detector and a power generator. <P>SOLUTION: A piezoelectric member 12 is a member for converting oscillation generated when a train 3 passes on a track 6 into an electric signal by the piezoelectric effect. The piezoelectric member 12 functions as a mechanical-electrical conversion unit for converting the mechanical oscillation generated when the train 3 passes into the electric signal, and also functions as a sensor for detecting the train 3 by generating electric power when a load is applied thereon by the passing of the train 3. The piezoelectric member 12 is inserted between a rail 7R and a supporter 8, and is a piezoelectric track pad for converting the oscillation into the electric signal. A piezoelectric rubber part 12a is a member in which a piezoelectric material is dispersed in a rubber. The piezoelectric rubber part 12a is manufactured, for example, by vulcanizing a mixture of a rubber material such as nitrile rubber and piezoelectric ceramic powder, and applying a voltage to both ends of the mixture to polarize the mixture. <P>COPYRIGHT: (C)2010,JPO&INPIT |
