Mass flow measuring device

Details Mass flow measuring device Mass flow measuring device

G - Physics

01

F

73/132

G01F 1/84 (2006.01)

Patent

CA 1300401

MASS FLOW MEASURING DEVICE Abstract of the Invention An apparatus for measuring the mass flow of a fluid flowing through a defined fluid stream by means of measuring the Coriolis reaction of the fluid in response to an imparted oscillation transverse to the flow. The appa- ratus generally includes inlet and outlet ends which are fixedly mounted with respect to one another and positioned along a single axis line. A flexible and continuous flow tube is formed between the inlet and outlet ends with the flow tube being substantially free floating, i.e. substan- tially free of restrictions or constraints along is periph- eral length. The flow tube generally forms at least one loop which is symmetrical with respect to the axis line and may take the form of a circular configuration and have inlet and outlet leg portions which deflect the flow from the inlet into the loop and from the loop into the outlet. The flow tube may also include two loops which are formed symmetrically about the single axis line and having a figure "8" or a "B"-shape. The flow tube may be osciallated by a driver at a frequency higher than its fundamental resonance so as to form nodal positions or local minimum amplitudes of vibration within its length which appear to be stationary and the adjacent portions of the flow tube oscillate.

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