Apparatus for the measurement of flowing media according to the

Details Apparatus for the measurement of flowing media according to the Apparatus for the measurement of flowing media according to the

1976-11-17

1978-11-28

Farley, Richard A.

Communications: electrical

Selective

Monitoring in addition to control

73194A, 128 205F, 128 205Z, G01S 966, A61B 1000

Patent

active

041278429

ABSTRACT:
To compensate the Doppler flow measurement for the angle of the ultrasonic beam relative to the flowing medium, the ultrasonic applicator includes a mechanical electrical angular position sensor for generating a signal as the applicator is shifted from a perpendicular relationship to the flow axis to a desired oblique angular relationship. As a particularly preferred embodiment, a rotary member is held relative to the flow axis as the applicator axis is rotated, placing a strain gauge under a proportional tension to unbalance a bridge circuit. A further development provides a sensor output as a function of the cosine of the angle of interest so that the bridge output is in the form required to compensate the flow measurement signal without a prior trigonometric operation thereon.

REFERENCES:
patent: 2859433 (1958-11-01), Saxton et al.
patent: 3541499 (1970-11-01), Lange
patent: 3554030 (1971-01-01), Peronneau

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