Measurement of the change in longitudinal force in a rail

Details Measurement of the change in longitudinal force in a rail Measurement of the change in longitudinal force in a rail

G - Physics

01

L

73/120

G01L 1/10 (2006.01)

Patent

CA 1048296

ABSTRACT A vibrating wire strain gauge for enabling the in-situ measurement of the change in longitudinal force in rails is set in a hole in the rail. The strain gauge comprises a ring to which the ends of the vibrating wire are secured and an electromagnetic coil arrangement for setting the wire in vibration and then detecting the vibration frequency of the wire. The electromagnetic coil arrangement comprises an annular coil surrounding a single pole piece and extending axially of the ring towards the wire. The pole piece is connected to the ring so that the magnetic circuit is completed through the body of the ring and the wire.

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