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Ultrasonic flow meter

About: Ultrasonic flow meter is a research topic. Over the lifetime, 3243 publications have been published within this topic receiving 29772 citations.


Papers
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Journal ArticleDOI
Abstract: Ultrasound Doppler velocimetry (UDV) was used to measure flow velocities at temperatures up to 620°C. To overcome the thermal restriction of the ultrasonic transducers an acoustic wave guide was used. The acoustic wave guide and the piezoelectric element are combined in the form of an integrated sensor. This approach allowed the first successful application of the ultrasound Doppler technique in liquid metals at temperatures above 200°C. The feasibility of this integrated sensor concept was demonstrated in experiments with metallic melts. Measurements were performed in a PbBi bubbly flow and in CuSn.

91 citations

Patent
26 Feb 1974
TL;DR: Inclusions in a flowing fluid, such as bubbles in a flow of blood, are detected by transmitting a continuous ultrasonic signal normally across the flow and detecting changes in the amplitude of the received ultrasonic signals as mentioned in this paper.
Abstract: Inclusions in a flowing fluid, such as bubbles in a flow of blood, are detected by transmitting a continuous ultrasonic signal normally across the flow and detecting changes in the amplitude of the received ultrasonic signal, these changes being caused by changes in the acoustic impedance of the fluid due to inclusions.

91 citations

Patent
24 Jan 1994
TL;DR: An inexpensive disposable plastic flow body interchangeably flow connects in line a conduit flowing fluid, and concurrently, acoustically connects to one or more ultrasonic transducers, so as to serve as an acoustic chamber for use with an ultrasonic flowmeter in the measurement of fluid flow velocity and/or volume as mentioned in this paper.
Abstract: An inexpensive disposable plastic flow body interchangeably flow connects in line a conduit flowing fluid, and also, concurrently, acoustically connects to one or more ultrasonic transducers, so as to serve as an acoustic chamber for use with an ultrasonic flowmeter in the measurement of fluid flow velocity and/or volume. The flow connection is preferably accomplished by plugging, preferably by inserting nozzles into surgical tubing. The external ultrasonic transducer(s) is (are) normally connected under pressured contact, typically under spring forces which are preferably of external origin. Acoustic-coupling elements in the walls of the acoustic chamber serve to match the acoustic impedance of the flow body to acoustic impedance of blood. The disposable plug-connected flow body is particularly safe, sterile and convenient for extracorporeal ultrasonic blood flow measurement.

91 citations

Journal ArticleDOI
TL;DR: In this paper, the combined influence of the location of thermocouples and heat flow meters, the size, shape and pasting angle of the heat flow meter on the measurement accuracy of the wall heat transfer coefficient (U-value) using the Heat Flow Meter method was determined.

90 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202334
202267
202142
202089
201983
201893