Echo sounding technique

Details Echo sounding technique Echo sounding technique

1977-02-23

1978-03-14

Farley, Richard A.

Communications: electrical

Selective

G01S 966, G01S 766

Patent

active

040793524

ABSTRACT:
An ultrasonic echo sounding technique for reducing unwanted echoes from reflectors outside the focal line of a focused ultrasonic field is disclosed. In this technique at least two pulse-defined ultrasonic waves are successively transmitted. The amplitudes of the said waves are functions of an angle .phi. which is generated about the axis of the source of ultrasound. Echoes from the reflected waves are received from reflectors both on and outside the focal line and multiplied by an amplitude factor which is a function of the above mentioned angle .phi.. Echo signals associated with echoes having the same transit time are then added together.

REFERENCES:
patent: 3086195 (1963-04-01), Halliday

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