| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an RFID (Radio Frequency Identification) tag usable by being burired in a concrete test specimen, the concrete test specimen having the buried tag and its manufacturing method, and a concrete quality control RFID system. <P>SOLUTION: The tag 2 is used, equipped with an antenna coil 2a formed by etching spirally a rolled copper foil on a plastic film, and provided with a hole 2c penetrating the plastic film and a heavy bob 9 for making the tag average density higher than the concrete density on an inside region of the antenna coil 2a. After concrete is injected into a formwork 6 while being tamped, the tag 2 is installed, and capping concrete 5b having weaker compressive strength than the concrete 5a used as a base is poured thereon, to thereby form the concrete test specimen. Hereby, the tag 2 can be buried into a prescribed position of the concrete test specimen upper part without damaging the tag 2 by a tamping rod. <P>COPYRIGHT: (C)2004,JPO |
