AN APPARATUS FOR MEASURING CHARACTERISTICS OF A MATERIAL FLOWING THROUGH THE APPARATUS AND A METHOD FOR AFFIXING A DRIVER MEANS TO AT LEAST ONE CONDUIT OF AN APPARATUS FOR MEASURING PROPERTIES OF A MATERIAL FLOWING THROUGH SAID AT LEAST ONE CONDUIT

摘要

A process parameter measurement device, and in particular a Coriolis mass flowmeter or vibrating tube densimeter, having a driver or drivers for inducing oscillation of at least one conduit. The drivers are attached at locations along the vibrating conduit selected to influence certain modes of interest. A driver is located near an area of maximum amplitude of a desired vibration mode and near an area of minimum amplitude of an undesired vibration mode. Various known experimental modal analysis or modeling techniques are used to determine the appropriate locations for one or more drivers. Multiple drivers located according to the present invention are used to influence, i.e., excite or suppress, multiple modes. In addition, multiple, separate drive circuits produce multiple, electronically isolated drive signals for delivering greater total power to the vibrating conduit.