초록 ▼

The flowmeter of the present invention comprises at least one conduit with the two extremities respectively connected to an inlet and outlet legs, an electromagnetic vibrator generating flexural vibrations of the conduit, and a motion detector detecting the flexural vibrations of the conduit, wherei

The flowmeter of the present invention comprises at least one conduit with the two extremities respectively connected to an inlet and outlet legs, an electromagnetic vibrator generating flexural vibrations of the conduit, and a motion detector detecting the flexural vibrations of the conduit, wherein the flexural vibration of the conduit has amplitude increasing from one extremity to the other extremity of the conduit. The media moving through the conduit carries away energy and momentum belonging to the flexural vibrations of the conduit and, consequently, attenuate the flexural vibrations at a higher rate compared with the flexural vibration of a conduit containing stationary media. The mass flow rate of media moving through the conduit is determined from the convective portion of attenuation of the intermittently imposed flexural vibrations, or from the convective portion of the decrease of the kinetic energy of the continuously imposed flexural vibrations.

대표청구항 ▼

An apparatus for measuring mass flow rate comprising in combination: (a) at least one elongated member including at least one flow passage with one extremity secured to a support to restrain lateral movement thereof and the other extremity disposed in a laterally flexible arrangement; (b) another el

An apparatus for measuring mass flow rate comprising in combination: (a) at least one elongated member including at least one flow passage with one extremity secured to a support to restrain lateral movement thereof and the other extremity disposed in a laterally flexible arrangement; (b) another elongated member including at least two flow passages with one extremity secured to the support to restrain lateral movement thereof and the other extremity disposed in a laterally flexible arrangement, wherein said two flow passages are connected to one another alowing media to circulate therethrough under zero net flow condition; (c) means for imposing flexural vibrations on said one and another elongated members; (d) first means for determining time rate of loss of momentum associated with the flexural vibration of said one elongated member from said one elongated member; and (e) second means for determining time rate of loss of momentum associated with the flexural vibration of said another elongated member from said another elongated member; wherein mass flow rate of media moving through said one elongated member is determined from the difference in the time rates of loss of momentum respectively determined by said first and second means for determining the time rate of loss of momentum.