Non-destructive contact-free determination of a hardness profile, especially for an energy absorbing solid body, whereby energetic radiation is applied to the surface and number of phase or intensity profiles determined

摘要

Method has the following steps: an excitation area on the surface of the body is exposed to energetic radiation with time varying intensity; the energy response of the body to the time varying excitation is measured in terms of intensity and-or phase displacement; a multiplicity of such measurements are made for different times; a phase or intensity profile is determined; a hardness profile is determined using a neuronal network; and a transfer function is numerically determined for different theoretical hardness profiles and-or comparison samples with predetermined hardness profiles. An Independent claim is made for a device for determining hardness profiles of energy absorbing solid bodies.