| Popis: |
In this paper, the technique of electronic sheraing speckle pattern interferometry with wide Audio-frequency driving vibration is used in non-destructive test of the multiply plywood structure. Test results show that we are able to evaluate promply the soundness of bonding of the plywood. In the process of test not only can we find any locations of defects from the synthesized intensity map very quickly, but also can obtain the shape, size and resonant frequency of every interior defect of the multiply plywood accurately. |
