The quantification of the flow distortion effect on measurement accuracy ultrasonic gas flowmeter downstream header is important but an area that has been less concern in research. By experiments and computational fluid dynamics (CFD), influence field was studied. Experimental results under three different installation conditions showed when there header, were 1% higher than those no distortion...

Ultrasonic flowmeters that use transit-time ultrasonic transducers face measurement errors due to “crosstalk,” whereby the working signal travels through pipe wall and couplings, interfering with from fluid. Although various procedures have been proposed solve issue of crosstalk, they’re limited low-frequency ranges, or they are not effective in high-pressure environments. We propose a mounting...

Intelligent magnetic flowmeter is one of main developing trend of magnetic flowmeter. This paper describes in detail the software and hardware designs of the intelligent magnetic flowmeter using MSP430 single chip computer, gives the realizing communication method based on HART protocol, and proposes the software and hardware technical stratagems for low power consumption design of magnetic flo...

Submarine ground water discharge can influence significantly the near-shore transport and flux of chemicals into the oceans. Quantification of the sources and rates of such discharge requires a ground water seepage meter that provides continuous measurements at high resolution over an extended period of time. An ultrasonic flowmeter has been adapted for such measurements in the submarine enviro...

We developed a new ultrasonic triangulation technique to measure regional wall thickness and shear motion of the left ventricular wall under normal conditions and during complete and partial coronary occlusions. In 10 open-chest dogs, a left ventricular micromanometer was inserted, and a screw-driven arterial clamp and flowmeter were placed around the left circumflex coronary artery. A single m...

This paper introduces research and development of a modern non-invasive device for determining flows velocity fields. is based on the ultrasonic method. The measured fluid flow surrounded by appropriate transmitters receivers, which communicate with each other. A physical principle this method consists in an interaction sound waves flow, generates certain delay transmission. found quantity thus...