Method and apparatus for measuring flow

Details Method and apparatus for measuring flow Method and apparatus for measuring flow

G - Physics

01

F

354/31

G01F 1/712 (2006.01) A61B 5/02 (2006.01) A61B 5/026 (2006.01)

Patent

CA 1210509

19 METHOD AND APPARATUS FOR MEASURING FLOW ABSTRACT OF THE DISCLOSURE Flow, and in particular nonuniform flow, as in a vascular system, is measured by applying a stochas- tic excitation signal to a system inlet which results in a measurable output signal at a downstream system outlet. Flow rate may be extracted by cross-correlating the excitation signal and the output signal. Calibration may be effected by conservation of mass principles whereby quantity type parameters are related to concen- tration type parameters. The stochastic signal has the characteristics of white noise, such that simplified spread spectral detection and signal extraction tech- niques may be employed to recover the desired intelli- gence. MMMMM1/9349-1

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