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
1975-03-07
1976-09-07
Goldstein, Herbert
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
G01N 2904
Patent
active
039787141
ABSTRACT:
In the course of checking an article, there are directed at the point on the article being checked, whereat ultrasonic oscillations generated by an ultrasonic flaw detecting transducer are applied, pulses of ultrasonic oscillations focused at this point, which pulses are sent by a side focusing ultrasonic transducer. The ultrasonic oscillations reflected from the surface of the article, in the form of a divergent beam, are received by two receiving ultrasonic transducers. The received ultrasonic oscillations are compared to obtain a difference signal; a detector head housing is then turned, depending on the magnitude and sign of said difference signal. As the difference signal disappears, the axis of the detector head housing becomes directed along a line normal to the surface of the article and the device serves for ultrasonic echo flaw detection and is provided with apparatus for maintaining constant the distance between the ultrasonic flaw detecting transducer and the surface of the article being checked; it also has apparatus for the orientation of the detector head, which slides over the surface of the article, around the point at which ultrasonic oscillations are applied, and for a deflection of the ultrasonic flaw detecting transducer from the normal by an angle to direct the ultrasonic beam refracted in a line material of the article along a line normal to the surface of the flaw.
REFERENCES:
patent: 2751783 (1956-06-01), Erdman
patent: 3257843 (1966-06-01), Cowan
patent: 3529466 (1970-09-01), Pryor et al.
patent: 3678736 (1972-07-01), May
Filippov Dmitry Alexandrovich
Genkin Mikhail Abramovich
Golodaev Boris Glebovich
Palkin Boris Alexandrovich
Razumovsky Anatoly Fedorovich
Beauchamp John P.
Goldstein Herbert
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