DISPLACEMENT DETECTOR, DISPLACEMENT DETECTION APPARATUS, DISPLACEMENT DETECTION SYSTEM, LOOSENING DETECTOR, LOOSENING DETECTION APPARATUS, AND SLACK LOOSENING DETECTION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a displacement detector that can readily and suitably detect relative displacements among members, a displacement detection apparatus and a displacement detection system, and more specifically, to provide a loosening detector that can readily and suitably detect loosening of a fastener to an object to be fastened, and to provide a loosening detection apparatus and a loosening detection system. SOLUTION: The loosening detector 10 is provided with a ring member 20 to be secured to objects 510 and 520 to be fastened and a cap member 30 that are rotated and moved to the objects 510 and 520, while being integrated with a bolt 100, wherein one is provided with an IC tag 35, capable of noncontact communication with a reader/writer 50 and the other is provided with a conductive piece 23 for intercepting communication with the IC tag 35. In the loosening detector jig 10, when the cap member 30 is rotated and moved by a regulated quantity or more to the ring member 20, propriety of communication between the IC tag 35 and the reader/writer 50 is changed. The loosening detector and the loosening detecting system detect the loosening of the bolt 100 by detecting such a change. COPYRIGHT: (C)2011,JPO&INPIT