Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1973-10-23
1976-03-02
Queisser, Richard C.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
73 715US, G01N 2904
Patent
active
039409520
ABSTRACT:
Apparatus for detecting an abnormality such as a discontinuity in a predetermined region of a material by directing an elastic mechanical wave, such as an ultrasonic or other acoustic wave, in a series of pulses to portions of the region and providing response to the wave pulses reflected therefrom. The amplitudes of pulses reflected from a normal portion of the region may approximate the amplitudes of pulses reflected from a portion where an abnormality is present and thus make it difficult to distinguish between such portions.
The directed wave is varied, as by rotating a transducer having an irregular cross-sectional radiation pattern, to provide randomlike variations in the shapes of successive pulses where reflected from a normal portion, differing detectably from any variations caused in the pulses where reflected from an abnormal portion.
Means responsive to a plurality of successive reflected pulses are provided for effectively superimposing them, either electrically or in an overlaid visual display, the types of wave shapes of the superimposed pulses being indicative selectively of a normal or an abnormal portion of the region.
REFERENCES:
patent: 3280621 (1966-10-01), Cardinal et al.
patent: 3470868 (1969-10-01), Krause et al.
patent: 3482434 (1969-12-01), Cowan et al.
patent: 3518697 (1970-06-01), Martens
patent: 3606791 (1971-09-01), Rathburn et al.
patent: 3721312 (1973-03-01), St. John
patent: 3817089 (1974-06-01), Eggleton
Battelle (Memorial Institute)
Dunson Philip M.
Kreitman Stephen A.
Queisser Richard C.
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