Measuring and testing – Volume or rate of flow – System
Patent
1975-12-17
1976-08-31
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
System
128 205F, G01F 166
Patent
active
039772470
ABSTRACT:
An arrangement for the measurement of the flow volume of flowing media, in particular of blood in its vessels, pursuant to the Ultrasonic-Doppler method, through the utilization of at least two ultrasound transmitter-receivers for the complete, or respectively, partial sounding of the volumetric section of a medium which is to be examined; a Doppler apparatus for determining the output power of the incident Doppler signals during the total, or respectively, partial sounding; as well as a ratio formulator for the output powers. A first ultrasound transmitter-receiver which only partly sounds through a volumetric section is constructed for the receipt of merely such Doppler signals which emanate from a test volume of predetermined dimensions of the flowing medium, which tests volume lies fully within, preferably at the median region, of that volumetric section which is fully sounded through by a further transmitter-receiver, and that a ratio formulator is constructed for the formation of the ratios of the power outputs of Doppler signals from the total volumetric section and from the test volume.
REFERENCES:
patent: 3554030 (1971-01-01), Peronneau
patent: 3675192 (1972-07-01), Fahrbach
Ruehl Charles A.
Siemens Aktiengesellschaft
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