Synthetic data collection method for full matrix capture using an ultrasound array
A method for efficiently achieving full-matrix ultrasonic data capture which includes the steps of providing an ultrasound array apparatus, the ultrasound array apparatus further comprising a probe, collecting data over a plurality of inspection locations, generating a plurality of data matrices, each of the data matrices reflecting data collected at the locations, and collecting, initially, a subset of a quantity of data needed for reconstruction of each of the inspection locations. In the method, as the probe moves from collection location to collection location, a data matrix at a prior collection location is gradually filled in as the probe moves to subsequent collection locations. In certain embodiments physical scanning of a probe with few elements is replaced by electronically scanning using an array with many elements.
1. A method for efficiently achieving full-matrix ultrasonic data capture comprising:
(a) providing a two-dimensional ultrasound array apparatus, the ultrasound array apparatus comprising a probe, the probe adapted for scanning and the probe comprising scan increments and nominal scan boundaries, wherein the two-dimensional ultrasound array apparatus has two array dimensions, an array dimension m along a long edge and an array dimension n along a short edge;
(b) moving the probe to a first location on the test piece;
(c) firing a first element in the long edge of the two-dimensional array and receiving data at all other elements of the array;
(d) subsequently firing at each of the remaining further elements along the long edge of array in turn, and receiving on all elements along the short edge of the array;
(e) moving the probe over a plurality of inspection locations in a raster scan; and
(f) repeating the steps of firing at a first element in the long edge of the two-dimensional array and receiving data at all other elements of the array, and subsequently firing at each of the remaining further elements along the long edge of array in turn, and receiving on all elements along the short edge of the array at the new inspection location.
2. The method of claim 1 , wherein the array is operated in pulse-echo mode.
3. The method of claim 1 , wherein the probe is scanned a predetermined distance beyond the nominal scan boundaries and the quantity of data is collected such that data matrices of the plurality of data matrices near the nominal scan boundaries are filled.
4. The method of claim 3 , wherein each of the dimensions has a number of elements along a length thereof, and wherein the distance the probe is scanned beyond the nominal scan boundaries is equal to the number of elements along each respective dimension minus one.
5. The method of claim 4 , wherein there are k scan points along the n dimension and 1 index, or step, points along the m dimension.