| 摘要 |
The invention relates to a nonlinear method that permits simple, fast and accurate detection of defects in a body made from brittle materials. In the case of the method, at least two temporally offset operations (A, B) are used such that the body is set vibrating (1a, 1b) with a different intensity, a vibrational response of the body in the time domain is picked up (2a, 2b), the vibrational response is normalized (3a, 3b), the beginning of the vibration is determined (4a, 4b) and a section of the vibrational response is determined (5a, 5b) whose start is formed by the previously determined beginning of the vibration, and which has a specific length, a correlation coefficient of the sections of the respective vibration responses of the at least two operations being formed as feature value for the detection of defects (6).
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