Abstract A phase-sensitive 2D motion estimator is useful for measurement of minute tissue motion. However, the effect conditions emission ultrasonic waves on accuracy such an has not been investigated thoroughly. In present study, was evaluated under a variety transmission conditions. Although plane wave imaging with single per frame achieved extremely high temporal resolution 10417 Hz, in esti...

Ultrasonic (US) flow meters are devices for a fluid measurement using the ultrasonic principle. Current research project dealing with developing flowmeter an innovative channel shape. Previously work was aimed to topology optimization CFD methods. The final prototype has be analyzed experimentally verify velocity profiles in US section. obtained this region necessary as input sensor data evalua...

The paper describes the development of a non-invasive flowmeter for lower flow rates and its first tests. This gauge is physically based on interaction fluid with an ultrasonic signal that passes through from transmitter to receiver. Ultrasonic flowmeters are currently relatively commonly used gauges, whose advantages such as non-invasiveness (i.e. zero pressure losses) ability seamlessly measu...

Ultrasonic properties of materials present a strong dependence on temperature and in turn the ultrasonic velocity of propagation in the material under test. It is precisely for this reason that most ultrasonic measurements are often carried out with thermostated samples by using either water tanks or climate chambers. This approach is viable in a laboratory and when the measured or characterize...

The objective of this study was to examine the potential of ultrasonic velocity as a rapid and nondestructive method to predict the dimensional stability of oak (Quercus petraea (Mattuschka) Lieblein) and chestnut (Castanea sativa Mill.) that are commonly used in flooring industry. Ultrasonic velocity, specific gravity, and radial, tangential and volumetric shrinkages were measured on seventy-f...

Steep mountain rivers have hydraulic and morphodynamic characteristics that hinder velocity measurements. The high spatial variability of hydraulic parameters, such as water depth (WD), river width and flow velocity, makes the choice of a representative cross-section to measure the velocity in detail challenging. Additionally, sediment transport and rapidly changing bed morphology exclude the u...

Experimental study of multi-path ultrasonic flowmeters measurement accuracy in complex flow fields was carried out in the water flowrate standard facility of National Water Large Flowrate Measurement Station. Several muti-path ultrasonic flowmeters with different path arrangement were studied. The flow disturbances were created by bend, tapered pipe, diverging pipe and butterfly valve. By study...

Background:  Some studies show that frozen shoulder is due to the pathologic changes in the muscles around the shoulder. Measurement of the ultrasonic thickness of a muscle is a method for measuring the muscle changes. There is no study about the reliability of measurement of the muscle’s ultrasonic thickness around the shoulder in patients with frozen shoulder. The present study aims to invest...

In this work the problem of measuring density and verifying structural integrity of wooden samples is approached by using non-contact ultrasonic transducers. The time of flight of the ultrasonic waves is measured in transmission mode using cross-correlation algorithms between emitted and received signals. Once known the times of flight, the propagation velocity through the wood, which is propor...