Statistical diagnosis using electrical resistance changes is performed to detect a
delamination crack in a CFRP beam. This method enables to reduce data required for damage
identification. First, a new measuring method of multiple electrical resistance changes is proposed to
perform statistical diagnosis. The proposed method measures electrical resistance changes of multiple
segments in a CFRP beam although electrical interference must be considered when multiple voltages
are charged at once. Next, statistical diagnosis is performed on loading to the CFRP beam. A
delamination crack is detected by the change of relative relationship between multiple electrical
resistance changes due to damage occurring. As a result, the monitored states of the CFRP beam are
diagnosed exactly by the proposed damage detection system.
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