G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 3/32 (2006.01) G01H 1/00 (2006.01) G01H 1/16 (2006.01) G01M 7/00 (2006.01) G01M 7/02 (2006.01) G01N 3/30 (2006.01) G01N 29/04 (2006.01) G01N 29/11 (2006.01) G01N 29/12 (2006.01) G01N 3/00 (2006.01) G01N 3/06 (2006.01)
Patent
CA 2157364
The fatigue integrity of metallic ma- terials may be determined be either one of two methods. In a first method, an impulse of energy is introduced into the metallic ma- terial, such as by striking the metallic mate- rial (20), and the induced vibration is sensed and analyzed in order to compute the damp- ing factor thereof, the damping factor be- ing directly related to the fatigue thereof. With this method, a transducer (28) is cou- pled to the metallic material and its output is amplified by an amplifier (30) before being input to a computer (32) which determines the damping factor. In a second method, a continuous energy input is provided to the metallic material, such as by utilizing a fre- quency generator coupled to a power ampli- fier whose output drives a transducer such as a speaker or the like for inducing a con- tinuous vibration in the metallic material. This continuous vibration is measured with a transducer, an amplifier, and a damping factor calculated with a computer as in the first method.
Osler Hoskin & Harcourt Llp
Washington University
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