BOLT LOOSENESS DETECTION SYSTEM, BOLT LOOSENESS DETECTION DEVICE, AND BOLT MANAGEMENT IMPLEMENT

摘要

PROBLEM TO BE SOLVED: To provide a bolt looseness detection system for correctly and efficiently detecting bolt looseness with a simple structure.

SOLUTION: An RFID tag 11 is mounted on the head of a bolt 20. The RFID tag 11 and the bolt 20 are covered with a radio shielding cover 12. Among response waves transmitted from the RFID tag 11, the ones passing through a slit 13 provided on the radio shielding cover 12 are received by an RFID reader/writer. Because the intensity of a radio waves passing through the slit 13 changes corresponding to the looseness angle of the bolt 20, the looseness of the bolt 20 is detected based on whether the ID information included in the response waves is readable or not and the received electric field intensity.

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