Ultrasonic flowmeter

Details Ultrasonic flowmeter Ultrasonic flowmeter

1993-12-08

1995-02-21

Jaworski, Francis

Surgery

Truss

Pad

A61B 806

Patent

active

053906764

ABSTRACT:
A flowmeter employing an array of ultrasonic wave transducer elements, the flowmeter being arranged in such a way that reception signals of plural reception beams aligned in parallel with one another are formed from detection signals of reflection ultrasonic waves from the transducer elements; the Fourier transformation is performed with respect to a direction of alignment of the reception beams; a moving target indication processing is then performed among a plurality of reception signals derived from the repetitive transmissions; the result of the Fourier transformation is treated as two-dimensional signals of time series corresponding to the transmission of the ultrasonic wave, and with respect to a plurality of straight lines coinciding at respective angles with the origin of a coordinate, signal values on each of the straight lines are treated as a one-dimension sequence of numbers to perform the Fourier transformation; and an axial velocity component and a lateral (transverse) velocity component of a moving object are obtained on the basis of the resulting signal distribution.

REFERENCES:
patent: 4930513 (1990-06-01), Mayo et al.
patent: 5201313 (1993-04-01), Katakura

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