Detecting damage to a structural member

Details Detecting damage to a structural member Detecting damage to a structural member

2005-01-11

2005-01-11

Hofsass, Jeffery (Department: 2636)

Communications: electrical

Condition responsive indicating system

Specific condition

C052S118000, C212S348000

Reexamination Certificate

active

06842119

ABSTRACT:
A method of detecting damage to a structural member which is part of a working arm of a working apparatus, which arm is moveable relative to a body of the apparatus by an actuator. In use, the arm carries a load at another end thereof. The method including the steps of locating in or on the structural member in a position which is liable to damage, at least one filament. So long as the filament remains undamaged, a signal is transmitted along the length of the filament. In the event of an interruption of the transmitted signal, a fault signal is generated. The fault signal is used to disable operation of the actuator. The method is particularly useful for working arms made from light weight composite materials in the form of a matrix of fibers in a resin material which is susceptible to impact damage which may not be visible.

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