Method and apparatus for imaging thin structures
AssigneeGeneral Electric Company
InventorPeter William Lorraine
Life of this patent
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Abstract
An exemplary imaging apparatus includes a wave generator for generating a wave in an article; a detector for detecting a wave in the article; and a processor which: forms a matched filter based on a response of the article to a wave propagated through the article; directs the wave generator to generate a wave at a plurality of generation positions; directs the detector to detect a motion of the article at a plurality of detection positions; forms a scan data set from the detected motion of the article; multiplies the scan data set by the matched filter to produce a compensated data set; and coherently sums data points in the compensated data set to produce a focused image.
Claims29
A method of forming an image of an article comprising the steps of:
- propagating first waves in the article;
- measuring a response of the article to the first waves;
- forming a matched filter data set comprising first data points representing the response of the article to the first waves;
- generating second waves in the article at a plurality of generation positions on the article, which second waves propagate through the article;
- detecting a motion of the article at a plurality of detection positions to obtain second data points, the second data points forming a scan data set;
- multiplying the scan data set by the matched filter data set to generate a compensated data set comprising a plurality of third data points;
- and
- coherently summing the third data points in the compensated data set to form an image of the article.
A method of forming an image of an article comprising the steps of:
- analytically deriving data points representing a response of the article as a function of the distance to a source;
- forming a matched filter data set comprising first data points representing the response of the article as a function of the distance to a source;
- generating waves in the article at a plurality of generation positions on the article, which waves propagate through the article;
- detecting a motion of the article at a plurality of detecting positions to obtain second data points, the second data points forming a scan data set;
- multiplying the scan data set by the matched filter data set to generate a compensated data set comprising a plurality of third data points;
- and
- coherently summing the third data points in the compensated data set to form an image of the article.
An apparatus comprising;
- a wave generator for generating a wave in an article;
- a detector for detecting a wave in the article;
- and
- a processor for:
- sending first waves in the article;
- measuring a response of the article to the first waves;
- forming a matched filter based on the response of the article to the first waves;
- directing the wave generator to generate second waves at a plurality of generation positions;
- directing the detector to detect a motion of the article at a plurality of detection positions;
- forming a scan data set from the detected motion of the article;
- multiplying the scan data set by the matched filter to produce a compensated data set;
- and
- coherently summing data points in the compensated data set to produce a focused image.
Dependencies are inferred from the claim text.