Measuring and testing – Vibration – By mechanical waves
Patent
1981-01-12
1983-05-17
Ciarlante, Anthony V.
Measuring and testing
Vibration
By mechanical waves
73620, 128660, G01N 924, G01N 2900
Patent
active
043834477
ABSTRACT:
Focussing sound transducer head comprise at least one focussing sound transducer head for transmitting ultrasonic pulses to form a focussed sound beam having a relatively constricted depth zone, in which the sound beam is narrower than a sound beam that would be transmitted by a nonfocussing sound transducer head that is otherwise comparable to the sound transducer head which transmits said focussed sound beam, and for deriving echo signals from echoes generated in response to the pulses. A scanning mechanism moves the sound beam across a section surface in an object to be examined. Display controls are adapted to receive said echo signals and cause the echo signals to be displayed on a fluorescent screen at locations which are geometrically coordinated with the locations at which the corresponding echoes have originated in the section surface. Zone controls are operable to control the position of the relatively constricted length zone in such a manner that a plurality of relatively constricted length zones are successively obtained in different depth zones of the section surface. A signal selecting apparatus is operable to receive the echo signals and to deliver to the display control means only echo signals derived from echoes that have originated in the relatively constricted length zones.
REFERENCES:
patent: 3815409 (1974-06-01), Macouski
patent: 4028934 (1977-06-01), Sollish
patent: 4102204 (1978-07-01), Kretz
patent: 4135406 (1979-01-01), Kretz
patent: 4143554 (1979-03-01), Nagy et al.
patent: 4176658 (1979-12-01), Kossoff et al.
patent: 4177679 (1979-12-01), Soldner
patent: 4281549 (1981-08-01), Kretz
patent: 4287767 (1981-09-01), Kretz
patent: 4316390 (1982-02-01), Kretz
Carlson David V.
Ciarlante Anthony V.
Kelman Kurt
Kretztechnik Gesellschaft m.b.H.
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