Non-destructive testing of in-service wooden beams

Details Non-destructive testing of in-service wooden beams Non-destructive testing of in-service wooden beams

G - Physics

01

M

G01M 7/08 (2006.01) G01N 19/08 (2006.01) G01N 33/46 (2006.01)

Patent

CA 2484456

Wooden utility pole structures are nondestructively tested while in service, in particular utility pole cross-arms. A helicopter or boom truck brings an operator to the cross-arm. Manually striking the cross-arm using a hammer or other weight with an attached accelerometer senses and sends a shock wave through the cross-arm. The shock wave also is sensed using a second accelerometer sensor in a temporarily affixed sensor pod at the other end of the cross-arm, or a Itematively, a non- contact radar vibration sensor is trained on a fastener in the cross-arm, to sense vibration from the shock wave. Practical aspects include mounting particulars for affixing the sensor pod against the cross-arm, manipulating the sensor pod at an elevation below the helicopter working platform, measurements for dimensions and density, etc. The data is received at a processor and correlated with structural strength or used to rank the relative strength of cross-arms.

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