Strain monitoring system

Details Strain monitoring system Strain monitoring system

G - Physics

01

L

73/70

G01L 1/10 (2006.01) G01B 7/16 (2006.01)

Patent

CA 1240851

ABSTRACT A vibrating wire strain meter has a steel proving ring across the bore of which extends a taut wire. The outer surface of the proving ring has sloping or tapered grooves extend- ing axially along the entire length of the ring. A pair of dia- metrically opposed wedges sloping at the same angle as the grooves are used to wedge the proving ring in a borehole. The tapered grooves provide positive guiding of the wedges such that the device can be positioned accurately and repeatably in relation to the borehole wall. Preferably, the wire extends across a diameter which is perpendicular to the diameter on which the grooves and wedges are located. A novel tool for inserting and withdrawing the strain meter is also described.

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