MAGNETIC DISPLACEMENT SWITCH, MAGNETIC DISPLACEMENT SENSOR, SHAKE SENSOR, MAGNETIC DISPLACEMENT/SHAKE SENSOR AND BOLT LOOSENING CONTINUOUSLY MONITORING SYSTEM USING THEM

摘要

PROBLEM TO BE SOLVED: To provide a magnetic displacement switch utilizing change in needle direction of an azimuth magnetic needle in response to a change in a weak magnetic field, and a magnetic displacement sensor thereof.;SOLUTION: In the magnetic displacement switch, a switch function is provided to one end of the azimuth magnetic needle, and a change of close/open state of a needle and a contact point according to the change in the magnetic field is utilized. The open/close state of a magnetic displacement switch 34 changes according to a relative positional relationship between the magnet 33 attached to a bolt 31 or a nut 32, and the magnetic displacement switch 34. The change is utilized to remotely and continuously monitor the loosening of the bolt.;COPYRIGHT: (C)2014,JPO&INPIT