Comparison of pressure and ultrasound measurements in vortex flow meters

A new approach to detection of vortices using ultrasound

“…Different factors effect to the measurement uncertainty: Shape and position of the bluff body, position of the sensor, roughness of the inner surface of the pipeline, electronic signal processing etc. [7,14,17,21,25,27].…”

“…Using ultrasound, vortices can be detected at a lower flow rate, but the ultrasonic method of vortex detection is more sensitive to the turbulent fluctuation caused by eddies and secondary vortices. This is a key disadvantage of the ultrasonic vortex flow meters [21,22,25]. For the elimination of the effects of noise on the measurement signal caused by installation vibration and disturbances in the fluid flow, i.e.…”

Evaluation of uncertainty in a vortex flowmeter measurement

“…2 illustrates this arrangement. Compared with the conventional vortex flowmeters using pressure sensors [14], the differential pressure sensor in the experiments could detect both the upper and lower vortices behind the bluff body. In the experiment section, vortex signals were measured, amplified and saved.…”

Design and Performance of the Converging-Diverging Vortex Flowmeter

“…Hans and Windorfer applied ultrasound to vortex flowmeters with improved sensitivity [4]. These approaches may complicate the manufacture of the vortex flowmeter and lead to additional costs.…”