| US 7,584,062 B1 | ||
| Sub-wavelength ultrasound characterization of composite material | ||
| Hong H. Tat, Redmond, Wash. (US); Richard H. Bossi, Renton, Wash. (US); Yuan-Jye Wu, Issaquah, Wash. (US); and John-Paul N. Sabino, Bellevue, Wash. (US) | ||
| Assigned to The Boeing Company, Chicago, Ill. (US) | ||
| Filed on Jun. 20, 2008, as Appl. No. 12/143,662. | ||
| Int. Cl. G01B 5/02 (2006.01) | ||
| U.S. Cl. 702—39 [73/597; 73/639; 367/99; 702/171] | 20 Claims |
| 1. A method performed at least in part by a computer, comprising:
recording pulse data corresponding to an ultrasonic pulse emitted into a multi-layer structure of a material by a transducer
in a memory of a computer;
recording echo data resulting from the ultrasonic pulse in the memory of the computer;
defining a matrix “φ” including time-shifting the pulse data by predetermined amounts;
deriving an echo vector “Y” from the echo data;
determining a solution vector “X” within a predetermined tolerance in accordance with an expression: Y=φ*X; and
presenting the solution vector X as a B-scan display that represents the multi-layer structure of the material on a display
device.
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