| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the transmission efficiency of tag information to a tag reading device. <P>SOLUTION: An autonomous tag includes: a piezoelectric part for creating electric energy from a mechanical energy; a radio transmission part for transmitting tag information by using electric energy generated by the piezoelectric part; and a transmission timing control part for controlling a timing in which the radio transmission part transmits the tag information. The piezoelectric part includes a plurality of laminated piezoelectric elements and a first repulsion member installed between the plurality of piezoelectric elements. The radio transmission part continuously transmits the tag information by successively using electric energy successively generated by the plurality of piezoelectric elements. <P>COPYRIGHT: (C)2010,JPO&INPIT |
