WARNING METHOD FOR DAMAGE POSITION AND DETECTING SYSTEM THEREFOR

摘要

PURPOSE: To make a damaged position perform a self-warning by a light emis sion and to easily and effectively detect the damage position such as a crack generated to affect a base material surface layer or a base material. ;CONSTITUTION: A light emitting layer 2b is formed on the lower layer side of a base material surface layer 2c and the surface part or the inner part of a base material 1. If a damage such as a crack 3, etc., is so generated as to affect the layer 2c or the material 1, the emitting layer of the part emits a light by the incident light from the damage, and the damaged position is externally self-warned by the emission. The damage generated at the layer 2c or the material 1 such as the crack 3 is detected according to the difference between the emission for self-warning from the damage toward the exterior and the reflected light at the layer 2c.;COPYRIGHT: (C)1996,JPO