Apparatus for examining an object by ultrasonic echography

Details Apparatus for examining an object by ultrasonic echography Apparatus for examining an object by ultrasonic echography

1985-06-10

1987-07-21

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73629, G01N 2900

Patent

active

046809660

ABSTRACT:
An apparatus for examining objects by ultrasonic echography comprising an ultrasonic transmitting transducer (10) and an ultrasonic receiving transducer (20), with which are associated a transmitter stage (30), a receiver stage (40) constituted by a channel (100) for processing the echo signals reflected to the receiving transducer by the obstacles they meet in the said region and a storage and/or visualization stage (60), characterized in that the transmitting transducer (10) is at the same time a receiver and in that the receiver stage (40) also comprises a channel (200) for processing the output signals of the said transmitting/receiving transducer (10) thus formed and a subtraction device (500), whose output is connected to a first input (560) of the storage and/or visualization stage and whose two inputs receive the output signals of the said channels (100) and (200) representative of the real and theoretical travelling times, respectively, between the transducers.

REFERENCES:
patent: 4395909 (1983-08-01), Steinberg et al.
patent: 4566459 (1986-01-01), Umemura et al.
patent: 4570486 (1986-02-01), Volkmann

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