Smart Coriolis mass flowmeter

Abstract

A piezoelectric element is provided for a Coriolis flowmeter having a flow tube adapted to vibrate at a predetermined resonance frequency to determine mass flowrate of a fluid passing there through. The driver includes a strain element, such as an elongated piezoelectric element fastened axially along the wall of the tube. The piezoelectric element is adapted to oscillate in the axial direction along the wall of the tube to generate and/or sense vibration of the tube in response to. The piezoelectric element may be utilized as a driver or, alternately, as a sensor wherein the piezoelectric element is oscillated along with oscillation of tube wall in the axial direction to generate an output signal responsive thereto. The piezoelectric material PZT is placed at different locations for actuation and sensing and for various lengths like .35 m, .45 m, .55 m, .6 m. The different locations of actuation are centre actuation, side actuation, actuation near fixture. © 2009 Elsevier Ltd. All rights reserved.